Table of Contents                                  Index to Financial Statements

 
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-K
þ
ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
 
For the Fiscal Year Ended December 31, 2018
 
OR
¨
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
 
For the Transition Period from              to             
Commission
File Number
 
Registrant, State of Incorporation,
Address and Telephone Number
 
I.R.S. Employer
Identification No.
1-3526
 
The Southern Company
 
58-0690070
 
 
(A Delaware Corporation)
 
 
 
 
30 Ivan Allen Jr. Boulevard, N.W.
 
 
 
 
Atlanta, Georgia 30308
 
 
 
 
(404) 506-5000
 
 
 
 
 
 
 
1-3164
 
Alabama Power Company
 
63-0004250
 
 
(An Alabama Corporation)
 
 
 
 
600 North 18th Street
 
 
 
 
Birmingham, Alabama 35291
 
 
 
 
(205) 257-1000
 
 
 
 
 
 
 
1-6468
 
Georgia Power Company
 
58-0257110
 
 
(A Georgia Corporation)
 
 
 
 
241 Ralph McGill Boulevard, N.E.
 
 
 
 
Atlanta, Georgia 30308
 
 
 
 
(404) 506-6526
 
 
 
 
 
 
 
001-11229
 
Mississippi Power Company
 
64-0205820
 
 
(A Mississippi Corporation)
 
 
 
 
2992 West Beach Boulevard
 
 
 
 
Gulfport, Mississippi 39501
 
 
 
 
(228) 864-1211
 
 
 
 
 
 
 
001-37803
 
Southern Power Company
 
58-2598670
 
 
(A Delaware Corporation)
 
 
 
 
30 Ivan Allen Jr. Boulevard, N.W.
 
 
 
 
Atlanta, Georgia 30308
 
 
 
 
(404) 506-5000
 
 
 
 
 
 
 
1-14174
 
Southern Company Gas
 
58-2210952
 
 
(A Georgia Corporation)
 
 
 
 
Ten Peachtree Place, N.E.
 
 
 
 
Atlanta, Georgia 30309
 
 
 
 
(404) 584-4000
 
 
 
 
 
 
 


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Securities registered pursuant to Section 12(b) of the Act: (1)  
Each of the following classes or series of securities registered pursuant to Section 12(b) of the Act is listed on the New York Stock Exchange.
Title of each class
 
 
 
Registrant
Common Stock, $5 par value
 
 
 
The Southern Company
 
 
 
 
 
Junior Subordinated Notes, $25 denominations
 
 
 
 
6.25% Series 2015A due 2075
 
 
 
 
5.25% Series 2016A due 2076
 
 
 
 
5.25% Series 2017B due 2077
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Class A preferred stock, cumulative, $25 stated capital
 
 
 
Alabama Power Company
5.00% Series
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Junior Subordinated Notes, $25 denominations
 
 
 
Georgia Power Company
5.00% Series 2017A due 2077
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Senior Notes
 
 
 
Southern Power Company
1.000% Series 2016A due 2022
 
 
 
 
1.850% Series 2016B due 2026
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Securities registered pursuant to Section 12(g) of the Act: (1)
 
 
 
 
 
 
 
Title of each class
 
 
 
Registrant
Preferred stock, cumulative, $100 par value
 
 
 
Alabama Power Company
4.20% Series                                      4.60% Series
 
4.72% Series        
 
 
4.52% Series                                      4.64% Series
 
4.92% Series        
 
 
 
 
 
 
 
(1)
At December 31, 2018.


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Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

Registrant
Yes
No
The Southern Company
X
 
Alabama Power Company
X
 
Georgia Power Company
X
 
Mississippi Power Company
 
X
Southern Power Company
X
 
Southern Company Gas
X
 
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ¨ No x (Response applicable to all registrants.)
Indicate by check mark whether the registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days. Yes x No ¨
Indicate by check mark whether the registrants have submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrants were required to submit such files). Yes x No ¨
Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrants' knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. ¨
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.
 
Registrant
Large
Accelerated
Filer
Accelerated
Filer
Non-accelerated
Filer
Smaller
Reporting
Company
Emerging Growth Company
The Southern Company
X
 
 
 
 
Alabama Power Company
 
 
X
 
 
Georgia Power Company
 
 
X
 
 
Mississippi Power Company
 
 
X
 
 
Southern Power Company
 
 
X
 
 
Southern Company Gas
 
 
X
 
 
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ¨
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ¨ No x (Response applicable to all registrants.)


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Aggregate market value of The Southern Company's common stock held by non-affiliates of The Southern Company at June 29, 2018 : $47.0 billion . All of the common stock of the other registrants is held by The Southern Company. A description of each registrant's common stock follows:

Registrant
 
Description of
Common Stock
 
Shares Outstanding at January 31, 2019
The Southern Company
 
Par Value $5 Per Share
 
1,034,564,279

Alabama Power Company
 
Par Value $40 Per Share
 
30,537,500

Georgia Power Company
 
Without Par Value
 
9,261,500

Mississippi Power Company
 
Without Par Value
 
1,121,000

Southern Power Company
 
Par Value $0.01 Per Share
 
1,000

Southern Company Gas
 
Par Value $0.01 Per Share
 
100

Documents incorporated by reference: specified portions of The Southern Company's Definitive Proxy Statement on Schedule 14A relating to the 2019 Annual Meeting of Stockholders are incorporated by reference into PART III. In addition, specified portions of the Definitive Information Statement on Schedule 14C of Alabama Power Company relating to its 2019 Annual Meeting of Shareholders are incorporated by reference into PART III.
Each of Georgia Power Company, Mississippi Power Company, Southern Power Company, and Southern Company Gas meets the conditions set forth in General Instructions I(1)(a) and (b) of Form 10-K and is therefore filing this Form 10-K with the reduced disclosure format specified in General Instructions I(2)(b), (c), and (d) of Form 10-K.
This combined Form 10-K is separately filed by The Southern Company, Alabama Power Company, Georgia Power Company, Mississippi Power Company, Southern Power Company, and Southern Company Gas. Information contained herein relating to any individual company is filed by such company on its own behalf. Each company makes no representation as to information relating to the other companies.


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Table of Contents

 
 
Page
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

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     Table of Contents                                  Index to Financial Statements
DEFINITIONS

When used in this Form 10-K, the following terms will have the meanings indicated.
Term
Meaning
2013 ARP
Alternative Rate Plan approved by the Georgia PSC in 2013 for Georgia Power for the years 2014 through 2016 and subsequently extended through 2019
AFUDC
Allowance for funds used during construction
Alabama Power
Alabama Power Company
AMEA
Alabama Municipal Electric Authority
AOCI
Accumulated other comprehensive income
ARO
Asset retirement obligation
ASC
Accounting Standards Codification
ASU
Accounting Standards Update
Atlanta Gas Light
Atlanta Gas Light Company, a wholly-owned subsidiary of Southern Company Gas
Atlantic Coast Pipeline
Atlantic Coast Pipeline, LLC, a joint venture to construct and operate a natural gas pipeline in which Southern Company Gas has a 5% ownership interest
Bcf
Billion cubic feet
Bechtel
Bechtel Power Corporation, the primary contractor for the remaining construction activities for Plant Vogtle Units 3 and 4
Bechtel Agreement
The October 23, 2017 construction completion agreement between the Vogtle Owners and Bechtel
CCR
Coal combustion residuals
CCR Rule
Disposal of Coal Combustion Residuals from Electric Utilities final rule published by the EPA in 2015
Chattanooga Gas
Chattanooga Gas Company, a wholly-owned subsidiary of Southern Company Gas
Clean Air Act
Clean Air Act Amendments of 1990
CO 2
Carbon dioxide
COD
Commercial operation date
Contractor Settlement Agreement
The December 31, 2015 agreement between Westinghouse and the Vogtle Owners resolving disputes between the Vogtle Owners and the EPC Contractor under the Vogtle 3 and 4 Agreement
Cooperative Energy
Electric cooperative in Mississippi
CPCN
Certificate of public convenience and necessity
Customer Refunds
Refunds issued to Georgia Power customers in 2018 as ordered by the Georgia PSC related to the Guarantee Settlement Agreement
CWIP
Construction work in progress
Dalton
City of Dalton, Georgia, an incorporated municipality in the State of Georgia, acting by and through its Board of Water, Light, and Sinking Fund Commissioners
Dalton Pipeline
A pipeline facility in Georgia in which Southern Company Gas has a 50% undivided ownership interest
DOE
U.S. Department of Energy
Duke Energy Florida
Duke Energy Florida, LLC
EBIT
Earnings before interest and taxes
ECM
Mississippi Power's energy cost management clause
ECO Plan
Mississippi Power's environmental compliance overview plan
Eligible Project Costs
Certain costs of construction relating to Plant Vogtle Units 3 and 4 that are eligible for financing under the loan guarantee program established under Title XVII of the Energy Policy Act of 2005
EMC
Electric membership corporation
EPA
U.S. Environmental Protection Agency
EPC Contractor
Westinghouse and its affiliate, WECTEC Global Project Services Inc.; the former engineering, procurement, and construction contractor for Plant Vogtle Units 3 and 4

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DEFINITIONS
(continued)


Term
Meaning
FASB
Financial Accounting Standards Board
FERC
Federal Energy Regulatory Commission
FFB
Federal Financing Bank
Fitch
Fitch Ratings, Inc.
FMPA
Florida Municipal Power Agency
GAAP
U.S. generally accepted accounting principles
Georgia Power
Georgia Power Company
Georgia Power 2019 Base Rate Case
Georgia Power's base rate case scheduled to be filed by July 1, 2019
Georgia Power Tax Reform Settlement Agreement
A settlement agreement between Georgia Power and the staff of the Georgia PSC regarding the retail rate impact of the Tax Reform Legislation, as approved by the Georgia PSC on April 3, 2018
GHG
Greenhouse gas
Guarantee Settlement Agreement
The June 9, 2017 settlement agreement between the Vogtle Owners and Toshiba related to certain payment obligations of the EPC Contractor guaranteed by Toshiba
Gulf Power
Gulf Power Company
Heating Degree Days
A measure of weather, calculated when the average daily temperatures are less than 65 degrees Fahrenheit
Heating Season
The period from November through March when Southern Company Gas' natural gas usage and operating revenues are generally higher
HLBV
Hypothetical liquidation at book value
Horizon Pipeline
Horizon Pipeline Company, LLC
IBEW
International Brotherhood of Electrical Workers
IGCC
Integrated coal gasification combined cycle, the technology originally approved for Mississippi Power's Kemper County energy facility (Plant Ratcliffe)
IIC
Intercompany Interchange Contract
Illinois Commission
Illinois Commerce Commission
Interim Assessment Agreement
Agreement entered into by the Vogtle Owners and the EPC Contractor to allow construction to continue after the EPC Contractor's bankruptcy filing
Internal Revenue Code
Internal Revenue Code of 1986, as amended
IPP
Independent Power Producer
IRP
Integrated Resource Plan
IRS
Internal Revenue Service
ITAAC
Inspections, Tests, Analyses, and Acceptance Criteria, standards established by the NRC
ITC
Investment tax credit
JEA
Jacksonville Electric Authority
KUA
Kissimmee Utility Authority
KW
Kilowatt
KWH
Kilowatt-hour
LIBOR
London Interbank Offered Rate
LIFO
Last-in, first-out
LNG
Liquefied natural gas
Loan Guarantee Agreement
Loan guarantee agreement entered into by Georgia Power with the DOE in 2014, under which the proceeds of borrowings may be used to reimburse Georgia Power for Eligible Project Costs incurred in connection with its construction of Plant Vogtle Units 3 and 4
LOCOM
Lower of weighted average cost or current market price
LTSA
Long-term service agreement
Marketers
Marketers selling retail natural gas in Georgia and certificated by the Georgia PSC

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DEFINITIONS
(continued)


Term
Meaning
MEAG
Municipal Electric Authority of Georgia
Merger
The merger, effective July 1, 2016, of a wholly-owned, direct subsidiary of Southern Company with and into Southern Company Gas, with Southern Company Gas continuing as the surviving corporation
MGP
Manufactured gas plant
Mississippi Power
Mississippi Power Company
mmBtu
Million British thermal units
Moody's
Moody's Investors Service, Inc.
MPUS
Mississippi Public Utilities Staff
MRA
Municipal and Rural Associations
MW
Megawatt
MWH
Megawatt hour
natural gas distribution utilities
Southern Company Gas' natural gas distribution utilities (Nicor Gas, Atlanta Gas Light, Virginia Natural Gas, Elizabethtown Gas, Florida City Gas, Chattanooga Gas, and Elkton Gas as of June 30, 2018) (Nicor Gas, Atlanta Gas Light, Virginia Natural Gas, and Chattanooga Gas as of July 29, 2018)
NCCR
Georgia Power's Nuclear Construction Cost Recovery
NDR
Alabama Power's Natural Disaster Reserve
NextEra Energy
NextEra Energy, Inc.
Nicor Gas
Northern Illinois Gas Company, a wholly-owned subsidiary of Southern Company Gas
NO X
Nitrogen oxide
NRC
U.S. Nuclear Regulatory Commission
NYMEX
New York Mercantile Exchange, Inc.
NYSE
New York Stock Exchange
OCI
Other comprehensive income
OPC
Oglethorpe Power Corporation (an Electric Membership Corporation)
OTC
Over-the-counter
OUC
Orlando Utilities Commission
PATH Act
Protecting Americans from Tax Hikes Act
PennEast Pipeline
PennEast Pipeline Company, LLC, a joint venture to construct and operate a natural gas pipeline in which Southern Company Gas has a 20% ownership interest
PEP
Mississippi Power's Performance Evaluation Plan
Piedmont
Piedmont Natural Gas Company, Inc.
Pivotal Home Solutions
Nicor Energy Services Company, until June 4, 2018 a wholly-owned subsidiary of Southern Company Gas, doing business as Pivotal Home Solutions
Pivotal Utility Holdings
Pivotal Utility Holdings, Inc., until July 29, 2018 a wholly-owned subsidiary of Southern Company Gas, doing business as Elizabethtown Gas (until July 1, 2018), Elkton Gas (until July 1, 2018), and Florida City Gas
power pool
The operating arrangement whereby the integrated generating resources of the traditional electric operating companies and Southern Power (excluding subsidiaries) are subject to joint commitment and dispatch in order to serve their combined load obligations
PowerSecure
PowerSecure Inc.
PowerSouth
PowerSouth Energy Cooperative
PPA
Power purchase agreements, as well as, for Southern Power, contracts for differences that provide the owner of a renewable facility a certain fixed price for the electricity sold to the grid
PRP
Pipeline Replacement Program, Atlanta Gas Light's 15-year infrastructure replacement program, which ended in December 2013
PSC
Public Service Commission
PTC
Production tax credit

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DEFINITIONS
(continued)


Term
Meaning
Rate CNP
Alabama Power's Rate Certificated New Plant
Rate CNP Compliance
Alabama Power's Rate Certificated New Plant Compliance
Rate CNP PPA
Alabama Power's Rate Certificated New Plant Power Purchase Agreement
Rate ECR
Alabama Power's Rate Energy Cost Recovery
Rate NDR
Alabama Power's Rate Natural Disaster Reserve
Rate RSE
Alabama Power's Rate Stabilization and Equalization
registrants
Southern Company, Alabama Power, Georgia Power, Mississippi Power, Southern Power Company, and Southern Company Gas
revenue from contracts with customers
Revenue from contracts accounted for under the guidance of ASC 606, Revenue from Contracts with Customers
ROE
Return on equity
RUS
Rural Utilities Service
S&P
S&P Global Ratings, a division of S&P Global Inc.
SCS
Southern Company Services, Inc. (the Southern Company system service company)
SEC
U.S. Securities and Exchange Commission
SEGCO
Southern Electric Generating Company
SEPA
Southeastern Power Administration
Sequent
Sequent Energy Management, L.P.
SERC
Southeastern Electric Reliability Council
SNG
Southern Natural Gas Company, L.L.C.
SO 2
Sulfur dioxide
Southern Company
The Southern Company
Southern Company Gas
Southern Company Gas and its subsidiaries
Southern Company Gas Capital
Southern Company Gas Capital Corporation, a 100%-owned subsidiary of Southern Company Gas
Southern Company Gas Dispositions
Southern Company Gas' disposition of Pivotal Home Solutions, Pivotal Utility Holdings' disposition of Elizabethtown Gas and Elkton Gas, and NUI Corporation's disposition of Pivotal Utility Holdings, which primarily consisted of Florida City Gas
Southern Company system
Southern Company, the traditional electric operating companies, Southern Power, Southern Company Gas (as of July 1, 2016), SEGCO, Southern Nuclear, SCS, Southern Linc, PowerSecure (as of May 9, 2016), and other subsidiaries
Southern Holdings
Southern Company Holdings, Inc.
Southern Linc
Southern Communications Services, Inc.
Southern Nuclear
Southern Nuclear Operating Company, Inc.
Southern Power
Southern Power Company and its subsidiaries
SouthStar
SouthStar Energy Services, LLC
SP Solar
SP Solar Holdings I, LP
SP Wind
SP Wind Holdings II, LLC
SRR
Mississippi Power's System Restoration Rider, a tariff for retail property damage reserve
STRIDE
Atlanta Gas Light's Strategic Infrastructure Development and Enhancement program
Subsidiary Registrants
Alabama Power, Georgia Power, Mississippi Power, Southern Power, and Southern Company Gas
Tax Reform Legislation
The Tax Cuts and Jobs Act, which became effective on January 1, 2018
Toshiba
Toshiba Corporation, parent company of Westinghouse
traditional electric operating companies
Alabama Power, Georgia Power, Gulf Power, and Mississippi Power through December 31, 2018; Alabama Power, Georgia Power, and Mississippi Power as of January 1, 2019
Triton
Triton Container Investments, LLC

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DEFINITIONS
(continued)


Term
Meaning
VCM
Vogtle Construction Monitoring
VIE
Variable interest entity
Virginia Commission
Virginia State Corporation Commission
Virginia Natural Gas
Virginia Natural Gas, Inc., a wholly-owned subsidiary of Southern Company Gas
Vogtle 3 and 4 Agreement
Agreement entered into with the EPC Contractor in 2008 by Georgia Power, acting for itself and as agent for the Vogtle Owners, and rejected in bankruptcy in July 2017, pursuant to which the EPC Contractor agreed to design, engineer, procure, construct, and test Plant Vogtle Units 3 and 4
Vogtle Owners
Georgia Power, Oglethorpe Power Corporation, MEAG, and Dalton
Vogtle Services Agreement
The June 9, 2017 services agreement between the Vogtle Owners and the EPC Contractor, as amended and restated on July 20, 2017, for the EPC Contractor to transition construction management of Plant Vogtle Units 3 and 4 to Southern Nuclear and to provide ongoing design, engineering, and procurement services to Southern Nuclear
WACOG
Weighted average cost of gas
Westinghouse
Westinghouse Electric Company LLC

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CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATION
This Annual Report on Form 10-K contains forward-looking statements. Forward-looking statements include, among other things, statements concerning regulated rates, the strategic goals for the business, customer and sales growth, economic conditions, fuel and environmental cost recovery and other rate actions, projected equity ratios, current and proposed environmental regulations and related compliance plans and estimated expenditures, pending or potential litigation matters, access to sources of capital, projections for the qualified pension plans, postretirement benefit plans, and nuclear decommissioning trust fund contributions, financing activities, completion dates of construction projects, completion of announced dispositions, filings with state and federal regulatory authorities, federal and state income tax benefits, estimated sales and purchases under power sale and purchase agreements, and estimated construction plans and expenditures. In some cases, forward-looking statements can be identified by terminology such as "may," "will," "could," "would," "should," "expects," "plans," "anticipates," "believes," "estimates," "projects," "predicts," "potential," or "continue" or the negative of these terms or other similar terminology. There are various factors that could cause actual results to differ materially from those suggested by the forward-looking statements; accordingly, there can be no assurance that such indicated results will be realized. These factors include:

the impact of recent and future federal and state regulatory changes, including environmental laws and regulations, and also changes in tax (including the Tax Reform Legislation) and other laws and regulations to which Southern Company and its subsidiaries are subject, as well as changes in application of existing laws and regulations;
the extent and timing of costs and liabilities to comply with federal and state laws, regulations, and legal requirements related to CCR, including amounts for required closure of ash ponds and ground water monitoring;
current and future litigation or regulatory investigations, proceedings, or inquiries, including litigation and other disputes related to the Kemper County energy facility;
the effects, extent, and timing of the entry of additional competition in the markets in which Southern Company's subsidiaries operate, including from the development and deployment of alternative energy sources;
variations in demand for electricity and natural gas;
available sources and costs of natural gas and other fuels;
the ability to complete necessary or desirable pipeline expansion or infrastructure projects, limits on pipeline capacity, and operational interruptions to natural gas distribution and transmission activities;
transmission constraints;
effects of inflation;
the ability to control costs and avoid cost and schedule overruns during the development, construction, and operation of facilities, including Plant Vogtle Units 3 and 4 which includes components based on new technology that only recently began initial operation in the global nuclear industry at this scale, including changes in labor costs, availability, and productivity; challenges with management of contractors, subcontractors, or vendors; adverse weather conditions; shortages, increased costs, or inconsistent quality of equipment, materials, and labor; contractor or supplier delay; non-performance under construction, operating, or other agreements; operational readiness, including specialized operator training and required site safety programs; engineering or design problems; design and other licensing-based compliance matters, including the timely resolution of ITAAC and the related approvals by the NRC; challenges with start-up activities, including major equipment failure and system integration; and/or operational performance;
the ability to construct facilities in accordance with the requirements of permits and licenses (including satisfaction of NRC requirements), to satisfy any environmental performance standards and the requirements of tax credits and other incentives, and to integrate facilities into the Southern Company system upon completion of construction;
investment performance of the employee and retiree benefit plans and nuclear decommissioning trust funds;
advances in technology;
the ability to control operating and maintenance costs;
ongoing renewable energy partnerships and development agreements;
state and federal rate regulations and the impact of pending and future rate cases and negotiations, including rate actions relating to ROE, equity ratios, and fuel and other cost recovery mechanisms;

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CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATION
(continued)
the ability to successfully operate the electric utilities' generating, transmission, and distribution facilities and Southern Company Gas' natural gas distribution and storage facilities and the successful performance of necessary corporate functions;
legal proceedings and regulatory approvals and actions related to Plant Vogtle Units 3 and 4, including Georgia PSC approvals and NRC actions;
under certain specified circumstances, a decision by holders of more than 10% of the ownership interests of Plant Vogtle Units 3 and 4 not to proceed with construction and the ability of other Vogtle Owners to tender a portion of their ownership interests to Georgia Power following certain construction cost increases;
in the event Georgia Power becomes obligated to provide funding to MEAG with respect to the portion of MEAG's ownership interest in Plant Vogtle Units 3 and 4 involving JEA, any inability of Georgia Power to receive repayment of such funding;
the inherent risks involved in operating and constructing nuclear generating facilities;
the inherent risks involved in transporting and storing natural gas;
the performance of projects undertaken by the non-utility businesses and the success of efforts to invest in and develop new opportunities;
internal restructuring or other restructuring options that may be pursued;
potential business strategies, including acquisitions or dispositions of assets or businesses, including the proposed disposition of Plant Mankato, which cannot be assured to be completed or beneficial to Southern Company or its subsidiaries;
the ability of counterparties of Southern Company and its subsidiaries to make payments as and when due and to perform as required;
the ability to obtain new short- and long-term contracts with wholesale customers;
the direct or indirect effect on the Southern Company system's business resulting from cyber intrusion or physical attack and the threat of physical attacks;
interest rate fluctuations and financial market conditions and the results of financing efforts;
access to capital markets and other financing sources;
changes in Southern Company's and any of its subsidiaries' credit ratings;
the ability of Southern Company's electric utilities to obtain additional generating capacity (or sell excess generating capacity) at competitive prices;
catastrophic events such as fires, earthquakes, explosions, floods, tornadoes, hurricanes and other storms, droughts, pandemic health events, or other similar occurrences;
the direct or indirect effects on the Southern Company system's business resulting from incidents affecting the U.S. electric grid, natural gas pipeline infrastructure, or operation of generating or storage resources;
impairments of goodwill or long-lived assets;
the effect of accounting pronouncements issued periodically by standard-setting bodies; and
other factors discussed elsewhere herein and in other reports filed by the registrants from time to time with the SEC.
The registrants expressly disclaim any obligation to update any forward-looking statements.

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PART I
Item 1.
BUSINESS
Southern Company was incorporated under the laws of Delaware on November 9, 1945. Southern Company owns all of the outstanding common stock of Alabama Power, Georgia Power, and Mississippi Power, each of which is an operating public utility company. The traditional electric operating companies supply electric service in the states of Alabama, Georgia, and Mississippi. More particular information relating to each of the traditional electric operating companies is as follows:
Alabama Power is a corporation organized under the laws of the State of Alabama on November 10, 1927, by the consolidation of a predecessor Alabama Power Company, Gulf Electric Company, and Houston Power Company. The predecessor Alabama Power Company had been in continuous existence since its incorporation in 1906.
Georgia Power was incorporated under the laws of the State of Georgia on June 26, 1930.
Mississippi Power was incorporated under the laws of the State of Mississippi on July 12, 1972 and effective December 21, 1972, by the merger into it of the predecessor Mississippi Power Company, succeeded to the business and properties of the latter company. The predecessor Mississippi Power Company was incorporated under the laws of the State of Maine on November 24, 1924.
On January 1, 2019, Southern Company completed its sale of Gulf Power to NextEra Energy for an aggregate cash purchase price of approximately $5.8 billion (less $1.3 billion of indebtedness assumed), subject to customary working capital adjustments. Gulf Power is an electric utility serving retail customers in the northwestern portion of Florida. See Note 15 to the financial statements under " Southern Company's Sale of Gulf Power " in Item 8 herein for additional information.
In addition, Southern Company owns all of the common stock of Southern Power Company, which is also an operating public utility company. The term "Southern Power" when used herein refers to Southern Power Company and its subsidiaries, while the term "Southern Power Company" when used herein refers only to the Southern Power parent company. Southern Power develops, constructs, acquires, owns, and manages power generation assets, including renewable energy projects, and sells electricity at market-based rates in the wholesale market. Southern Power Company is a corporation organized under the laws of Delaware on January 8, 2001. On May 22, 2018, Southern Power sold a noncontrolling 33% equity interest in SP Solar, a limited partnership indirectly owning substantially all of Southern Power's solar facilities, for approximately $1.2 billion and, on December 11, 2018, Southern Power sold a noncontrolling tax equity interest in SP Wind, a holding company owning a portfolio of eight operating wind facilities, for approximately $1.2 billion. Southern Power also sold all of its equity interests in Plant Oleander and Plant Stanton Unit A (together, the Florida Plants) to NextEra Energy on December 4, 2018 for $203 million. On November 5, 2018, Southern Power entered into an agreement to sell all of its equity interests in Plant Mankato (including the 385-MW expansion currently under construction) for approximately $650 million. The transaction is subject to FERC and state commission approvals and is expected to close mid-2019. The ultimate outcome of this matter cannot be determined at this time. See "The Southern Company System – Southern Power" herein and Note 15 to the financial statements in Item 8 herein for additional information.
Southern Company acquired all of the common stock of Southern Company Gas in July 2016. Southern Company Gas is an energy services holding company whose primary business is the distribution of natural gas in four states - Illinois, Georgia, Virginia, and Tennessee - through the natural gas distribution utilities. Southern Company Gas is also involved in several other businesses that are complementary to the distribution of natural gas. Southern Company Gas was incorporated under the laws of the State of Georgia on November 27, 1995 for the primary purpose of becoming the holding company for Atlanta Gas Light, which was founded in 1856. In July 2018, Southern Company Gas completed sales of three of its natural gas distribution utilities (Elizabethtown Gas, Florida City Gas, and Elkton Gas). In June 2018, Southern Company Gas also completed the sale of Pivotal Home Solutions, which provided home equipment protection products and services. See "The Southern Company System – Southern Company Gas" herein and Note 15 to the financial statements in Item 8 herein for additional information.
Southern Company also owns all of the outstanding common stock or membership interests of SCS, Southern Linc, Southern Holdings, Southern Nuclear, PowerSecure, and other direct and indirect subsidiaries. SCS, the system service company, has contracted with Southern Company, each traditional electric operating company, Southern Power, Southern Company Gas, Southern Nuclear, SEGCO, and other subsidiaries to furnish, at direct or allocated cost and upon request, the following services: general executive and advisory, general and design engineering, operations, purchasing, accounting, finance, treasury, legal, tax, information technology, marketing, auditing, insurance and pension administration, human resources, systems and procedures, digital wireless communications, cellular tower space, and other services with respect to business and operations, construction management, and power pool transactions. Southern Linc provides digital wireless communications for use by Southern Company and its subsidiary companies and also markets these services to the public and provides fiber optics services within the Southeast. Southern Holdings is an intermediate holding company subsidiary, primarily for Southern Company's investments in leveraged leases and energy-related funds and companies, and for other electric and natural gas products and

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services. Southern Nuclear operates and provides services to the Southern Company system's nuclear power plants and is currently managing construction of and developing Plant Vogtle Units 3 and 4, which are co-owned by Georgia Power. PowerSecure is a provider of energy solutions, including distributed energy infrastructure, energy efficiency products and services, and utility infrastructure services, to customers.
Alabama Power and Georgia Power each own 50% of the outstanding common stock of SEGCO. SEGCO is an operating public utility company that owns electric generating units with an aggregate capacity of 1,020 MWs at Plant Gaston on the Coosa River near Wilsonville, Alabama. Alabama Power and Georgia Power are each entitled to one-half of SEGCO's capacity and energy. Alabama Power acts as SEGCO's agent in the operation of SEGCO's units and furnishes fuel to SEGCO for its units. See Note 7 to the financial statements in Item 8 herein for additional information.
Segment information for Southern Company and Southern Company Gas is included in Note 16 to the financial statements in Item 8 herein.
The registrants' Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and any amendments to those reports are made available on Southern Company's website, free of charge, as soon as reasonably practicable after such material is electronically filed with or furnished to the SEC. Southern Company's internet address is www.southerncompany.com.
The Southern Company System
Traditional Electric Operating Companies
The traditional electric operating companies are vertically integrated utilities that own generation, transmission, and distribution facilities. See PROPERTIES in Item 2 herein for additional information on the traditional electric operating companies' generating facilities. Each company's transmission facilities are connected to the respective company's own generating plants and other sources of power (including certain generating plants owned by Southern Power) and are interconnected with the transmission facilities of the other traditional electric operating companies and SEGCO. For information on the State of Georgia's integrated transmission system, see "Territory Served by the Southern Company System – Traditional Electric Operating Companies and Southern Power" herein.
Agreements in effect with principal neighboring utility systems provide for capacity and energy transactions that may be entered into from time to time for reasons related to reliability or economics. Additionally, the traditional electric operating companies have entered into various reliability agreements with certain neighboring utilities, each of which provides for the establishment and periodic review of principles and procedures for planning and operation of generation and transmission facilities, maintenance schedules, load retention programs, emergency operations, and other matters affecting the reliability of bulk power supply. The traditional electric operating companies have joined with other utilities in the Southeast to form the SERC to augment further the reliability and adequacy of bulk power supply. Through the SERC, the traditional electric operating companies are represented on the North American Electric Reliability Council.
The utility assets of the traditional electric operating companies and certain utility assets of Southern Power Company are operated as a single integrated electric system, or power pool, pursuant to the IIC. Activities under the IIC are administered by SCS, which acts as agent for the traditional electric operating companies and Southern Power Company. The fundamental purpose of the power pool is to provide for the coordinated operation of the electric facilities in an effort to achieve the maximum possible economies consistent with the highest practicable reliability of service. Subject to service requirements and other operating limitations, system resources are committed and controlled through the application of centralized economic dispatch. Under the IIC, each traditional electric operating company and Southern Power Company retains its lowest cost energy resources for the benefit of its own customers and delivers any excess energy to the power pool for use in serving customers of other traditional electric operating companies or Southern Power Company or for sale by the power pool to third parties. The IIC provides for the recovery of specified costs associated with the affiliated operations thereunder, as well as the proportionate sharing of costs and revenues resulting from power pool transactions with third parties. In connection with the sale of Gulf Power, an appendix was added to the IIC setting forth terms and conditions governing Gulf Power's continued participation in the IIC for a defined transition period that, subject to certain potential adjustments, is scheduled to end on January 1, 2024.
Southern Power and Southern Linc have secured from the traditional electric operating companies certain services which are furnished in compliance with FERC regulations.
Alabama Power and Georgia Power each have agreements with Southern Nuclear to operate the Southern Company system's existing nuclear plants, Plants Farley, Hatch, and Vogtle. In addition, Georgia Power has an agreement with Southern Nuclear to develop, license, construct, and operate Plant Vogtle Units 3 and 4. See "Regulation – Nuclear Regulation" herein for additional information.

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Southern Power
Southern Power develops, constructs, acquires, owns, and manages power generation assets, including renewable energy facilities, and sells electricity at market-based rates (under authority from the FERC) in the wholesale market. Southern Power continually seeks opportunities to execute its strategy to create value through various transactions including acquisitions, dispositions, and sales of partnership interests, development and construction of new generating facilities, and entry into PPAs primarily with investor-owned utilities, IPPs, municipalities, electric cooperatives, and other load-serving entities, as well as commercial and industrial customers. Southern Power's business activities are not subject to traditional state regulation like the traditional electric operating companies, but the majority of its business activities are subject to regulation by the FERC. Southern Power has attempted to insulate itself from significant fuel supply, fuel transportation, and electric transmission risks by generally making such risks the responsibility of the counterparties to its PPAs. However, Southern Power's future earnings will depend on the parameters of the wholesale market and the efficient operation of its wholesale generating assets, as well as Southern Power's ability to execute its growth strategy and to develop and construct generating facilities. For additional information on Southern Power's business activities, see MANAGEMENT'S DISCUSSION AND ANALYSIS – OVERVIEW – "Business Activities" of Southern Power in Item 7 herein.
Southern Power Company directly owns and manages generation assets primarily in the Southeast, which are included in the power pool, and has various subsidiaries, which were created to own and operate natural gas and renewable generation facilities either wholly or in partnership with various third parties. At December 31, 2018 , Southern Power's generation fleet, which is owned in part with its various partners, totaled 11,888 MWs of nameplate capacity in commercial operation (including 4,508 MWs of nameplate capacity owned by its subsidiaries and including Plant Mankato, which is classified as held for sale in the financial statements). In addition, Southern Power Company has other subsidiaries that are pursuing additional natural gas generation and other renewable generation development opportunities. The generation assets of Southern Power Company's subsidiaries are not included in the power pool.
On May 22, 2018, Southern Power sold a noncontrolling 33% equity interest in SP Solar, a limited partnership indirectly owning substantially all of Southern Power's solar facilities. On December 11, 2018, Southern Power sold a noncontrolling tax equity interest in SP Wind, a holding company which owns a portfolio of eight operating wind farms.
In addition, on December 4, 2018, Southern Power sold all of its equity interests in the Florida Plants and, in November 2018, entered into an agreement to sell Plant Mankato. The completion of the disposition of Plant Mankato is subject to the expansion unit reaching commercial operation as well as various other customary conditions to closing, including FERC and state commission approvals, and is expected to close mid-2019. The ultimate outcome of this matter cannot be determined at this time.
A majority of Southern Power's partnerships in renewable facilities allow for the sharing of cash distributions and tax benefits at differing percentages, with Southern Power being the controlling member and thus consolidating the assets and operations of the partnerships. At December 31, 2018, Southern Power has three tax-equity partnership arrangements where the tax-equity investors receive substantially all of the tax benefits, including ITCs and PTCs. In addition, Southern Power holds controlling interests in eight partnerships in solar facilities through SP Solar. For seven of these solar partnerships, Southern Power and its new 33% partner, Global Atlantic, are entitled to 51% of all cash distributions and the respective partner that holds the Class B membership interests is entitled to 49% of all cash distributions. For the Desert Stateline partnership, Southern Power and Global Atlantic are entitled to 66% of all cash distributions and the Class B member is entitled to 34% of all cash distributions. In addition, Southern Power and Global Atlantic are entitled to substantially all of the federal tax benefits with respect to these eight partnership entities. Finally, for the Roserock partnership, Southern Power is entitled to 51% of all cash distributions and substantially all of the federal tax benefits, with the Class B member entitled to 49% of all cash distributions.
See PROPERTIES in Item 2 herein and Note 15 to the financial statements under "Southern Power" in Item 8 herein for additional information regarding Southern Power's acquisitions, dispositions, construction, and development projects.
Southern Power calculates an investment coverage ratio for its generating assets based on the ratio of investment under contract to total investment using the respective generation facilities' net book value (or expected in-service value for facilities under construction or being acquired) as the investment amount. With the inclusion of investments associated with the wind and natural gas facilities currently under construction, as well as other capacity and energy contracts, Southern Power has an average investment coverage ratio, at December 31, 2018, of 93 % through 2023 and 91 % through 2028, with an average remaining contract duration of approximately 14 years (including Plant Mankato, which is classified as held for sale in the financial statements).
Southern Power's natural gas and biomass sales are primarily through long-term PPAs that consist of two types of agreements. The first type, referred to as a unit or block sale, is a customer purchase from a dedicated plant unit where all or a portion of the generation from that unit is reserved for that customer. Southern Power typically has the ability to serve the unit or block sale customer from an alternate resource. The second type, referred to as requirements service, provides that Southern Power serves

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     Table of Contents                                  Index to Financial Statements

the customer's capacity and energy requirements from a combination of the customer's own generating units and from Southern Power resources not dedicated to serve unit or block sales. Southern Power has rights to purchase power provided by the requirements customers' resources when economically viable. Capacity charges that form part of the PPA payments are designed to recover fixed and variable operations and maintenance costs based on dollars-per-kilowatt year and to provide a return on investment.
Southern Power's electricity sales from solar and wind generating facilities are predominantly through long-term PPAs; however, these solar and wind PPAs do not have a capacity charge and customers either purchase the energy output of a dedicated renewable facility through an energy charge or provide Southern Power a certain fixed price for the electricity sold to the grid. As a result, Southern Power's ability to recover fixed and variable operations and maintenance expenses is dependent upon the level of energy generated from these facilities, which can be impacted by weather conditions, equipment performance, transmission constraints, and other factors.
The following tables set forth Southern Power's PPAs as of December 31, 2018:
Block Sales PPAs
Facility/Source
 
Counterparty
 
MWs (1)

 
 
 
Contract Term
Addison Units 1 and 3
 
Georgia Power
 
297

 
 
 
through May 2030
Addison Unit 2
 
MEAG Power
 
149

 
 
 
through April 2029
Addison Unit 4
 
Georgia Energy Cooperative
 
146

 
 
 
through May 2030
Cleveland County Unit 1
 
North Carolina EMC (NCEMC)
 
90-180

 
 
 
through Dec. 2036
Cleveland County Unit 2
 
NCEMC
 
183

 
 
 
through Dec. 2036
Cleveland County Unit 3
 
North Carolina Municipal Power Agency 1
 
183

 
 
 
through Dec. 2031
Dahlberg Units 1, 3, and 5
 
Cobb EMC
 
224

 
 
 
through Dec. 2027
Dahlberg Units 2, 6, 8, and 10
 
Georgia Power
 
298

 
 
 
through May 2025
Dahlberg Unit 4
 
Georgia Power
 
74

 
 
 
through May 2030
Franklin Unit 1
 
Duke Energy Florida
 
434

 
 
 
through May 2021
Franklin Unit 2
 
Morgan Stanley Capital Group
 
250

 
 
 
through Dec. 2025
Franklin Unit 2
 
Jackson EMC
 
60-65

 
 
 
through Dec. 2035
Franklin Unit 2
 
GreyStone Power Corporation
 
35

 
 
 
through Dec. 2035
Franklin Unit 2
 
Cobb EMC
 
100

 
 
 
through Dec. 2027
Franklin Unit 3
 
Morgan Stanley Capital Group
 
200-300

 
 
 
through Dec. 2033
Franklin Unit 3
 
Dalton
 
70

 
 
 
through Dec. 2027
Franklin Unit 3
 
Dalton
 
16

 
 
 
through Dec. 2019
Harris Unit 1
 
Georgia Power
 
640

 
 
 
through May 2030
Harris Unit 2
 
Georgia Power
 
657

 
 
 
through May 2019
Harris Unit 2
 
AMEA (2)
 
25

 
 
 
through Dec. 2025
Mankato (3)
 
Northern States Power Company
 
375

 
 
 
through July 2026
Mankato (3)
 
Northern States Power Company
 
345

 
 
 
June 2019 – May 2039 (4)
Nacogdoches
 
City of Austin, Texas
 
100

 
 
 
through May 2032
NCEMC PPA (5)
 
EnergyUnited
 
100

 
 
 
through Dec. 2021
Rowan CT Unit 1
 
North Carolina Municipal Power Agency 1
 
150

 
 
 
through Dec. 2030
Rowan CT Units 2 and 3
 
EnergyUnited
 
100-175

 
 
 
Jan. 2022 – Dec. 2025
Rowan CT Unit 3
 
EnergyUnited
 
113

 
 
 
through Dec. 2023
Rowan CC Unit 4
 
EnergyUnited
 
23-328

 
 
 
through Dec. 2025

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     Table of Contents                                  Index to Financial Statements

Block Sales PPAs (continued)
Facility/Source
 
Counterparty
 
MWs (1)

 
 
 
Contract Term
Rowan CC Unit 4
 
Duke Energy Progress, LLC
 
150

 
 
 
through Dec. 2019
Rowan CC Unit 4
 
Macquarie
 
150-250

 
 
 
Jan. 2019 – Nov. 2020
Wansley Unit 6
 
Century Aluminum
 
158

 
 
 
Jan. 2019 – Dec. 2020
Wansley Unit 7
 
JEA (6)
 
200

 
 
 
through Dec. 2019
(1)
The MWs and related facility units may change due to unit rating changes or assignment of units to contracts.
(2)
AMEA will also be served by Plant Franklin Unit 1 through December 2019.
(3)
On November 5, 2018, Southern Power entered into an agreement with Northern States Power to sell all of its equity interests in Plant Mankato (including the 385-MW expansion currently under construction). The ultimate outcome of this matter cannot be determined at this time. See Note 15 to the financial statements under "Southern Power – Sales of Natural Gas Plants" in Item 8 herein for additional information.
(4)
Subject to commercial operation of the 385-MW expansion project.
(5)
Represents sale of power purchased from NCEMC under a PPA.
(6)
JEA will also be served by Plant Wansley Unit 6 during 2019.
Requirements Services PPAs
Counterparty
 
MWs (1)
 
Contract Term
Nine Georgia EMCs
 
294-376
 
through Dec. 2024
Sawnee EMC
 
267-639
 
through Dec. 2027
Cobb EMC
 
0-145
 
through Dec. 2027
Flint EMC
 
135-194
 
through Dec. 2024
Dalton
 
53-92
 
through Dec. 2027
EnergyUnited
 
78-159
 
through Dec. 2025
City of Blountstown, Florida
 
10
 
through April 2022
(1)
Represents forecasted incremental capacity needs over the contract term.
Solar/Wind PPAs
Facility
Counterparty
MWs (1)

Contract Term
Solar (2)
 
 
 
Adobe
Southern California Edison Company
20

through June 2034
Apex
Nevada Power Company
20

through Dec. 2037
Boulder 1
Nevada Power Company
100

through Dec. 2036
Butler
Georgia Power
100

through Dec. 2046
Butler Solar Farm
Georgia Power
20

through Feb. 2036
Calipatria
San Diego Gas & Electric Company
20

through Feb. 2036
Campo Verde
San Diego Gas & Electric Company
139

through Oct. 2033
Cimarron
Tri-State Generation and Transmission Association, Inc.
30

through Dec. 2035
Decatur County
Georgia Power
19

through Dec. 2035
Decatur Parkway
Georgia Power
80

through Dec. 2040
Desert Stateline
Southern California Edison Company
300

through Sept. 2036
East Pecos
Austin Energy
119

through April 2032
Garland A
Southern California Edison Company
20

through Sept. 2036
Garland
Southern California Edison Company
180

through Oct. 2031
Gaskell West 1
Southern California Edison Company
20

through March 2038
Granville
Duke Energy Progress, LLC
3

through Oct. 2032
Henrietta
Pacific Gas & Electric Company (3)
100

through Sept. 2036
Imperial Valley
San Diego Gas & Electric Company
150

through Nov. 2039

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     Table of Contents                                  Index to Financial Statements

Solar/Wind PPAs (continued)
Facility
Counterparty
MWs (1)

Contract Term
Lamesa
City of Garland, Texas
102

through April 2032
Lost Hills Blackwell
99% to Pacific Gas & Electric Company (3)  and 1% to City of Roseville, California
32

through Dec. 2043
Macho Springs
El Paso Electric Company
50

through May 2034
Morelos
Pacific Gas & Electric Company (3)
15

through Feb. 2036
North Star
Pacific Gas & Electric Company (3)
60

through June 2035
Pawpaw
Georgia Power
30

through March 2046
Roserock
Austin Energy
157

through Nov. 2036
Rutherford
Duke Energy Carolinas, LLC
75

through Dec. 2031
Sandhills
Cobb EMC
111

through Oct. 2041
Sandhills
Flint EMC
15

through Oct. 2041
Sandhills
Sawnee EMC
15

through Oct. 2041
Sandhills
Middle Georgia and Irwin EMC
2

through Oct. 2041
Spectrum
Nevada Power Company
30

through Dec. 2038
Tranquillity
Shell Energy North America (US), LP
204

through Nov. 2019
Tranquillity
Southern California Edison Company
204

Dec. 2019 – Nov. 2034
Wind (4)
 
 
 
Bethel
Google Inc.
225

through Jan. 2029
Cactus Flats
General Mills, Inc.
98

through July 2033
Cactus Flats
General Motors Company
50

through July 2030
Grant Plains
Oklahoma Municipal Power Authority
41

Jan. 2020 – Dec. 2039
Grant Plains
Steelcase Inc.
25

through Dec. 2028
Grant Plains
Allianz Risk Transfer (Bermuda) Ltd.
81-122

through March 2027
Grant Wind
East Texas Electric Cooperative
50

through April 2036
Grant Wind
Northeast Texas Electric Cooperative
50

through April 2036
Grant Wind
Western Farmers Electric Cooperative
50

through April 2036
Kay Wind
Westar Energy Inc.
200

through Dec. 2035
Kay Wind
Grand River Dam Authority
99

through Dec. 2035
Passadumkeag
Western Massachusetts Electric Company
40

through June 2031
Reading (5)
Royal Caribbean Cruises Ltd.
200

April 2020 – March 2032
Salt Fork Wind
City of Garland, Texas
150

through Nov. 2030
Salt Fork Wind
Salesforce.com, Inc.
24

through Nov. 2028
Tyler Bluff Wind
The Proctor & Gamble Company
96

through Dec. 2028
Wake Wind
Equinix Enterprises, Inc.
100

through Oct. 2028
Wake Wind
Owens Corning
125

through Oct. 2028
Wildhorse (5)
Arkansas Electric Cooperative Corporation
100

Oct. 2019 – Sept. 2039
(1) MWs shown are for 100% of the PPA, which is based on demonstrated capacity of the facility.
(2) In May 2018, Southern Power sold a noncontrolling 33% equity interest in SP Solar (a limited partnership indirectly owning all of Southern Power's solar facilities, except the Roserock and Gaskell West facilities). SP Solar is the 51% majority owner of Boulder 1, Garland, Henrietta, Imperial Valley, Lost Hills Blackwell, North Star, and Tranquillity; the 66% majority owner of Desert Stateline; and the sole owner of the remaining SP Solar facilities. Southern Power is the 51% majority owner of Roserock and also the controlling partner in a tax equity partnership owning Gaskell West. All of these entities are consolidated subsidiaries of Southern Power.
(3) See Note 1 to the financial statements under " Revenues Concentration of Revenue " in Item 8 herein for additional information on Pacific Gas & Electric Company's bankruptcy filing.
(4) In December 2018, Southern Power sold a noncontrolling tax equity interest in SP Wind (which owns all of Southern Power's wind facilities, except Cactus Flats and the two wind projects under construction, Reading and Wildhorse). SP Wind is the 90.1% majority owner of Wake Wind and owns 100% of the remaining SP Wind facilities. Southern Power owns 100% of Reading and Wildhorse and is the controlling partner in a tax equity partnership owning Cactus Flats. All of these entities are consolidated subsidiaries of Southern Power.
(5) Subject to commercial operation.

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     Table of Contents                                  Index to Financial Statements

For the year ended December 31, 2018 , approximately 9.8% of Southern Power's revenues were derived from Georgia Power. Southern Power actively pursues replacement PPAs prior to the expiration of its current PPAs and anticipates that the revenues attributable to one customer may be replaced by revenues from a new customer; however, the expiration of any of Southern Power's current PPAs without the successful remarketing of a replacement PPA could have a material negative impact on Southern Power's earnings but is not expected to have a material impact on Southern Company's earnings.
Southern Company Gas
Southern Company Gas is an energy services holding company whose primary business is the distribution of natural gas through the natural gas distribution utilities. Southern Company Gas is also involved in several other businesses that are complementary to the distribution of natural gas, including gas pipeline investments, wholesale gas services, and gas marketing services. During the fourth quarter 2018, Southern Company Gas changed its reportable segments to further align with the way its new Chief Operating Decision Maker reviews operating results and has reclassified prior years' data to conform to the new reportable segment presentation. This change resulted in a new reportable segment, gas pipeline investments, which was formerly included in gas midstream operations. Gas pipeline investments consists primarily of joint ventures in natural gas pipeline investments including a 50% interest in SNG, two significant pipeline construction projects, and a 50% joint ownership interest in the Dalton Pipeline. Gas distribution operations, wholesale gas services, and gas marketing services continue to remain as separate reportable segments and reflect the impact of the Southern Company Gas Dispositions. The all other non-reportable segment includes segments below the quantitative threshold for separate disclosure, including the storage and fuels operations that were formerly included in gas midstream operations, and other subsidiaries that fall below the quantitative threshold for separate disclosure.
Gas distribution operations, the largest segment of Southern Company Gas' business, operates, constructs, and maintains approximately 75,200 miles of natural gas pipelines and 14 storage facilities, with total capacity of 158 Bcf, to provide natural gas to residential, commercial, and industrial customers. Gas distribution operations serves approximately 4.2 million customers across four states.
On July 1, 2018, a Southern Company Gas subsidiary, Pivotal Utility Holdings, completed the sales of the assets of two of its natural gas distribution utilities, Elizabethtown Gas and Elkton Gas, to South Jersey Industries, Inc. On July 29, 2018, Southern Company Gas and its wholly-owned direct subsidiary, NUI Corporation, completed the stock sale of Pivotal Utility Holdings, which then primarily consisted of Florida City Gas, to NextEra Energy. The transactions raised approximately $2.3 billion in proceeds. See Note 15 to the financial statements under "Southern Company Gas" in Item 8 herein for additional information.
Gas pipeline investments includes joint ventures in natural gas pipeline investments that enable the provision of diverse sources of natural gas supplies to the customers of Southern Company Gas. SNG, the largest natural gas pipeline investment, is the owner of a 7,000-mile pipeline connecting natural gas supply basins in Texas, Louisiana, Mississippi, and Alabama to markets in Louisiana, Mississippi, Alabama, Florida, Georgia, South Carolina, and Tennessee.
Wholesale gas services consists of Sequent and engages in natural gas storage and gas pipeline arbitrage and provides natural gas asset management and related logistical services to most of the natural gas distribution utilities as well as non-affiliate companies.
Gas marketing services is comprised of SouthStar and provides natural gas commodity and related services to customers in competitive markets or markets that provide for customer choice. SouthStar, serving approximately 697,000 natural gas commodity customers, markets gas to residential, commercial, and industrial customers and offers energy-related products that provide natural gas price stability and utility bill management.
On June 4, 2018, Southern Company Gas completed the stock sale of Pivotal Home Solutions to American Water Enterprises LLC for $365 million. See Note 15 to the financial statements under "Southern Company Gas" in Item 8 herein for additional information.
Other Businesses
PowerSecure, which was acquired by Southern Company in 2016, provides energy solutions, including distributed energy infrastructure, energy efficiency products and services, and utility infrastructure services, to customers.
Southern Holdings is an intermediate holding subsidiary, primarily for Southern Company's investments in leveraged leases and energy-related funds and companies, and also for other electric and natural gas products and services.
Southern Linc provides digital wireless communications for use by Southern Company and its subsidiary companies and also markets these services to the public. Southern Linc delivers multiple wireless communication options including push to talk, cellular service, text messaging, wireless internet access, and wireless data. Its system covers approximately 127,000 square

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     Table of Contents                                  Index to Financial Statements

miles in the Southeast. Southern Linc also provides fiber optics services within the Southeast through its subsidiary, Southern Telecom, Inc.
These efforts to invest in and develop new business opportunities may offer potential returns exceeding those of rate-regulated operations. However, these activities often involve a higher degree of risk.
Construction Programs
The subsidiary companies of Southern Company are engaged in continuous construction programs to accommodate existing and estimated future loads on their respective systems. For estimated construction and environmental expenditures for the periods 2019 through 2023 , see MANAGEMENT'S DISCUSSION AND ANALYSIS – FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements and Contractual Obligations" of each registrant in Item 7 herein. The Southern Company system's construction program consists of capital investment and capital expenditures to comply with environmental laws and regulations. In 2019 , the construction program is expected to be apportioned approximately as follows:
 
Southern
Company
    system (a)(b)
Alabama
Power (a)
Georgia
Power (a)
Mississippi
Power
 
(in billions)
New generation
$
1.6

$

$
1.6

$

Environmental compliance (c)
0.5

0.2

0.2


Generation maintenance
0.9

0.4

0.4

0.1

Transmission
1.0

0.3

0.6


Distribution
1.1

0.5

0.5

0.1

Nuclear fuel
0.2

0.1

0.1


General plant
0.5

0.2

0.2


 
5.8

1.8

3.7

0.2

Southern Power (d)
0.3

 
 
 
Southern Company Gas (e)
1.6

 
 
 
Other subsidiaries
0.3

 
 
 
Total (a)
$
8.0

$
1.8

$
3.7

$
0.2

(a)
Totals may not add due to rounding.
(b)
Includes the Subsidiary Registrants, as well as the other subsidiaries. See "Other Businesses" herein for additional information.
(c)
Reflects cost estimates for environmental regulations. These estimated expenditures do not include any potential compliance costs associated with pending regulation of CO 2 emissions from fossil-fuel-fired electric generating units or costs associated with ash pond closure and groundwater monitoring under the CCR Rule and the related state rules. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Laws and Regulations" and FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements and Contractual Obligations" of Southern Company and each traditional electric operating company in Item 7 herein for additional information.
(d)
Excludes up to approximately $0.5 billion for planned expenditures for plant acquisitions and placeholder growth, which may vary materially due to market opportunities and Southern Power's ability to execute its growth strategy.
(e)
Includes costs for ongoing capital projects associated with infrastructure improvement programs for certain natural gas distribution utilities that have been previously approved by their applicable state regulatory agencies. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – " Infrastructure Replacement Programs and Capital Projects " of Southern Company Gas in Item 7 herein for additional information.
The construction programs are subject to periodic review and revision, and actual construction costs may vary from these estimates because of numerous factors. These factors include: changes in business conditions; changes in load projections; changes in environmental laws and regulations; the outcome of any legal challenges to environmental rules; changes in electric generating plants, including unit retirements and replacements and adding or changing fuel sources at existing electric generating units, to meet regulatory requirements; changes in FERC rules and regulations; state regulatory agency approvals; changes in the expected environmental compliance program; changes in legislation; the cost and efficiency of construction labor, equipment, and materials; project scope and design changes; storm impacts; and the cost of capital. In addition, there can

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be no assurance that costs related to capital expenditures will be fully recovered. Additionally, planned expenditures for plant acquisitions may vary due to market opportunities and Southern Power's ability to execute its growth strategy.
The construction program also includes Plant Vogtle Units 3 and 4, which includes components based on new technology that only recently began initial operation in the global nuclear industry at this scale and which may be subject to additional revised cost estimates during construction. The ability to control costs and avoid cost and schedule overruns during the development, construction, and operation of new facilities is subject to a number of factors, including, but not limited to, changes in labor costs, availability, and productivity; challenges with management of contractors, subcontractors, or vendors; adverse weather conditions; shortages, increased costs, or inconsistent quality of equipment, materials, and labor; contractor or supplier delay; non-performance under construction, operating, or other agreements; operational readiness, including specialized operator training and required site safety programs; engineering or design problems; design and other licensing-based compliance matters, including the timely resolution of ITAAC and the related approvals by the NRC; challenges with start-up activities, including major equipment failure and system integration; and/or operational performance. See Note 2 to the financial statements under " Georgia Power Nuclear Construction " in Item 8 herein for additional information regarding Georgia Power's construction of Plant Vogtle Units 3 and 4.
Also see "Regulation – Environmental Laws and Regulations" herein for additional information with respect to certain existing and proposed environmental requirements and PROPERTIES – "Electric – Jointly-Owned Facilities" and – "Natural Gas – Jointly-Owned Facilities" in Item 2 herein and Note 5 to the financial statements under " Joint Ownership Agreements " in Item 8 herein for additional information concerning Alabama Power's, Georgia Power's, and Southern Power's joint ownership of certain generating units and related facilities with certain non-affiliated utilities and Southern Company Gas' joint ownership of a pipeline facility.
Financing Programs
See each of the registrant's MANAGEMENT'S DISCUSSION AND ANALYSIS – FINANCIAL CONDITION AND LIQUIDITY in Item 7 herein and Note  8 to the financial statements in Item 8 herein for information concerning financing programs.
Fuel Supply
Electric
The traditional electric operating companies' and SEGCO's supply of electricity is primarily fueled by natural gas and coal. Southern Power's supply of electricity is primarily fueled by natural gas. See MANAGEMENT'S DISCUSSION AND ANALYSIS – RESULTS OF OPERATION – "Electricity Business – Fuel and Purchased Power Expenses" of Southern Company and MANAGEMENT'S DISCUSSION AND ANALYSIS – RESULTS OF OPERATION – "Fuel and Purchased Power Expenses" of each traditional electric operating company in Item 7 herein for information regarding the electricity generated and the average cost of fuel in cents per net KWH generated for the years 2016 through 2018 .
The traditional electric operating companies have agreements in place from which they expect to receive substantially all of their 2019 coal burn requirements. These agreements have terms ranging between one and four years. In 2018 , the weighted average sulfur content of all coal burned by the traditional electric operating companies was 1.06%. This sulfur level, along with banked SO 2 allowances, allowed the traditional electric operating companies to remain within limits set by Phase I of the Cross-State Air Pollution Rule (CSAPR) under the Clean Air Act. In 2018 , the Southern Company system did not purchase any SO 2 allowances, annual NOx emission allowances, or seasonal NOx emission allowances from the market. As any additional environmental regulations are proposed that impact the utilization of coal, the traditional electric operating companies' fuel mix will be monitored to help ensure that the traditional electric operating companies remain in compliance with applicable laws and regulations. Additionally, Southern Company and the traditional electric operating companies will continue to evaluate the need to purchase additional emissions allowances, the timing of capital expenditures for emissions control equipment, and potential unit retirements and replacements. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Environmental Matters" of Southern Company, each traditional electric operating company, and Southern Power in Item 7 herein for additional information on environmental matters.
SCS, acting on behalf of the traditional electric operating companies and Southern Power Company, has agreements in place for the natural gas burn requirements of the Southern Company system. For 2019 , SCS has contracted for 557 Bcf of natural gas supply under agreements with remaining terms up to 15 years. In addition to natural gas supply, SCS has contracts in place for both firm natural gas transportation and storage. Management believes these contracts provide sufficient natural gas supplies, transportation, and storage to ensure normal operations of the Southern Company system's natural gas generating units.
Alabama Power and Georgia Power have multiple contracts covering their nuclear fuel needs for uranium, conversion services, enrichment services, and fuel fabrication. The uranium, conversion services, and fuel fabrication contracts have remaining

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terms ranging from one to 17 years. The remaining term lengths for the enrichment services contracts range from five to 10 years. Management believes suppliers have sufficient nuclear fuel production capability to permit the normal operation of the Southern Company system's nuclear generating units.
Changes in fuel prices to the traditional electric operating companies are generally reflected in fuel adjustment clauses contained in rate schedules. See "Rate Matters – Rate Structure and Cost Recovery Plans" herein for additional information. Southern Power's natural gas and biomass PPAs generally provide that the counterparty is responsible for substantially all of the cost of fuel.
Alabama Power and Georgia Power have contracts with the United States, acting through the DOE, that provide for the permanent disposal of spent nuclear fuel. The DOE failed to begin disposing of spent fuel in 1998, as required by the contracts, and Alabama Power and Georgia Power have pursued and are pursuing legal remedies against the government for breach of contract. See Note 3 to the financial statements under " Nuclear Fuel Disposal Costs " in Item 8 herein for additional information.
Natural Gas
Advances in natural gas drilling in shale producing regions of the United States have resulted in historically high supplies of natural gas and relatively low prices for natural gas. Procurement plans for natural gas supply and transportation to serve regulated utility customers are reviewed and approved by the regulatory agencies in the states where Southern Company Gas operates. Southern Company Gas purchases natural gas supplies in the open market by contracting with producers and marketers and, for the natural gas distribution utilities except Nicor Gas, from its wholly-owned subsidiary, Sequent, under asset management agreements approved by the applicable state regulatory agency. Southern Company Gas also contracts for transportation and storage services from interstate pipelines that are regulated by the FERC. When firm pipeline services are temporarily not needed, Southern Company Gas may release the services in the secondary market under FERC-approved capacity release provisions or utilize asset management arrangements, thereby reducing the net cost of natural gas charged to customers for most of the natural gas distribution utilities. Peak-use requirements are met through utilization of company-owned storage facilities, pipeline transportation capacity, purchased storage services, peaking facilities, and other supply sources, arranged by either transportation customers or Southern Company Gas.
Territory Served by the Southern Company System
Traditional Electric Operating Companies and Southern Power
As of January 1, 2019, the territory in which the traditional electric operating companies provide retail electric service comprises most of the states of Alabama and Georgia, together with southeastern Mississippi. See Note 15 to the financial statements under " Southern Company's Sale of Gulf Power " in Item 8 herein for information on the sale of Gulf Power. In this territory there are non-affiliated electric distribution systems that obtain some or all of their power requirements either directly or indirectly from the traditional electric operating companies. As of January 1, 2019, the territory had an area of approximately 114,000 square miles and an estimated population of approximately 16 million. Southern Power sells electricity at market-based rates in the wholesale market, primarily to investor-owned utilities, IPPs, municipalities, and other load-serving entities, as well as commercial and industrial customers.
Alabama Power is engaged, within the State of Alabama, in the generation, transmission, distribution, and purchase of electricity and the sale of electric service, at retail in approximately 400 cities and towns (including Anniston, Birmingham, Gadsden, Mobile, Montgomery, and Tuscaloosa), as well as in rural areas, and at wholesale to 11 municipally-owned electric distribution systems, all of which are served indirectly through sales to AMEA, and two rural distributing cooperative associations. The sales contract with AMEA is scheduled to expire on December 31, 2025. Alabama Power owns coal reserves near its Plant Gorgas and uses the output of coal from the reserves in its generating plants. Alabama Power also sells, and cooperates with dealers in promoting the sale of, electric appliances and products and markets and sells outdoor lighting services.
Georgia Power is engaged in the generation, transmission, distribution, and purchase of electricity and the sale of electric service within the State of Georgia, at retail in over 600 communities (including Athens, Atlanta, Augusta, Columbus, Macon, Rome, and Savannah), as well as in rural areas, and at wholesale to OPC, MEAG Power, Dalton, various EMCs, and non-affiliated utilities. Georgia Power also markets and sells outdoor lighting services.
Mississippi Power is engaged in the generation, transmission, distribution, and purchase of electricity and the sale of electric service within 23 counties in southeastern Mississippi, at retail in 123 communities (including Biloxi, Gulfport, Hattiesburg, Laurel, Meridian, and Pascagoula), as well as in rural areas, and at wholesale to one municipality, six rural electric distribution cooperative associations, and one generating and transmitting cooperative.

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For information relating to KWH sales by customer classification for the traditional electric operating companies, see MANAGEMENT'S DISCUSSION AND ANALYSIS – RESULTS OF OPERATIONS of Southern Company and each traditional electric operating company in Item 7 herein. For information relating to the number of retail customers served by customer classification for the traditional electric operating companies, see SELECTED FINANCIAL DATA of Southern Company and each traditional electric operating company in Item 6 herein. Also, for information relating to the sources of revenues for Southern Company, each traditional electric operating company, and Southern Power, reference is made to Item 7 herein.
The RUS has authority to make loans to cooperative associations or corporations to enable them to provide electric service to customers in rural sections of the country. As of January 1, 2019, there were approximately 58 electric cooperative distribution systems operating in the territory in which the traditional electric operating companies provide electric service at retail or wholesale.
One of these organizations, PowerSouth, is a generating and transmitting cooperative selling power to several distributing cooperatives, municipal systems, and other customers in south Alabama. As of December 31, 2018 , PowerSouth owned generating units with approximately 2,100 MWs of nameplate capacity, including an undivided 8.16% ownership interest in Alabama Power's Plant Miller Units 1 and 2. PowerSouth's facilities were financed with RUS loans secured by long-term contracts requiring distributing cooperatives to take their requirements from PowerSouth to the extent such energy is available. See PROPERTIES – "Jointly-Owned Facilities" in Item 2 herein and Note 5 to the financial statements under " Joint Ownership Agreements " in Item 8 herein for details of Alabama Power's joint-ownership with PowerSouth of a portion of Plant Miller. Alabama Power has a system supply agreement with PowerSouth to provide 200 MWs of capacity service through December 31, 2030 with an option to extend and renegotiate in the event Alabama Power builds new generation or contracts for new capacity.
Alabama Power has entered into a separate agreement with PowerSouth involving interconnection between their systems. The delivery of capacity and energy from PowerSouth to certain distributing cooperatives in the service territory of Alabama Power is governed by the Southern Company/PowerSouth Network Transmission Service Agreement. The rates for this service to PowerSouth are on file with the FERC.
OPC is an EMC owned by its 38 retail electric distribution cooperatives, which provide retail electric service to customers in Georgia. OPC provides wholesale electric power to its members through its generation assets, some of which are jointly owned with Georgia Power, and power purchased from other suppliers. OPC and the 38 retail electric distribution cooperatives are members of Georgia Transmission Corporation, an EMC (GTC), which provides transmission services to its members and third parties. See PROPERTIES – "Electric – Jointly-Owned Facilities" in Item 2 herein and Note 5 to the financial statements under " Joint Ownership Agreements " in Item 8 herein for additional information regarding Georgia Power's jointly-owned facilities.
Mississippi Power has an interchange agreement with Cooperative Energy, a generating and transmitting cooperative, pursuant to which various services are provided.
As of January 1, 2019, there were approximately 71 municipally-owned electric distribution systems operating in the territory in which the traditional electric operating companies provide electric service at retail or wholesale.
As of December 31, 2018 , 48 municipally-owned electric distribution systems and one county-owned system received their requirements through MEAG Power, which was established by a Georgia state statute in 1975. MEAG Power serves these requirements from self-owned generation facilities, some of which are jointly-owned with Georgia Power, and purchases from other resources. MEAG Power also has a pseudo scheduling and services agreement with Georgia Power. Dalton serves its requirements from self-owned generation facilities, some of which are jointly-owned with Georgia Power, and through purchases from Southern Power through a service agreement. See PROPERTIES – "Jointly-Owned Facilities" in Item 2 herein and Note 5 to the financial statements under " Joint Ownership Agreements " in Item 8 herein for additional information.
Georgia Power has entered into substantially similar agreements with GTC, MEAG Power, and Dalton providing for the establishment of an integrated transmission system to carry the power and energy of all parties. The agreements require an investment by each party in the integrated transmission system in proportion to its respective share of the aggregate system load. See PROPERTIES – "Jointly-Owned Facilities" in Item 2 herein for additional information.
Southern Power assumed or entered into PPAs with Georgia Power, investor-owned utilities, IPPs, municipalities, electric cooperatives, and other load-serving entities, as well as commercial and industrial customers. See "The Southern Company System – Southern Power" above and MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Power Sales Agreements" of Southern Power in Item 7 herein for additional information concerning Southern Power's PPAs.
SCS, acting on behalf of the traditional electric operating companies, also has a contract with SEPA providing for the use of the traditional electric operating companies' facilities at government expense to deliver to certain cooperatives and municipalities,

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entitled by federal statute to preference in the purchase of power from SEPA, quantities of power equivalent to the amounts of power allocated to them by SEPA from certain U.S. government hydroelectric projects.
Southern Company Gas
Southern Company Gas is engaged in the distribution of natural gas in four states through the natural gas distribution utilities. The natural gas distribution utilities construct, manage, and maintain intrastate natural gas pipelines and distribution facilities. Details of the natural gas distribution utilities at December 31, 2018 are as follows:
Utility
State
Number of customers

Approximate miles of pipe

 
 
(in thousands)
 
Nicor Gas
Illinois
2,237

34,285

Atlanta Gas Light
Georgia
1,643

33,610

Virginia Natural Gas
Virginia
301

5,650

Chattanooga Gas
Tennessee
67

1,655

Total
 
4,248

75,200

For information relating to the sources of revenue for Southern Company Gas, see MANAGEMENT'S DISCUSSION AND ANALYSIS – RESULTS OF OPERATIONS and – FUTURE EARNINGS POTENTIAL of Southern Company Gas in Item 7 herein.
Competition
Electric
The electric utility industry in the U.S. is continuing to evolve as a result of regulatory and competitive factors. Among the early primary agents of change was the Energy Policy Act of 1992, which allowed IPPs to access a utility's transmission network in order to sell electricity to other utilities.
The competition for retail energy sales among competing suppliers of energy is influenced by various factors, including price, availability, technological advancements, service, and reliability. These factors are, in turn, affected by, among other influences, regulatory, political, and environmental considerations, taxation, and supply.
The retail service rights of all electric suppliers in the State of Georgia are regulated by the Territorial Electric Service Act of 1973. Pursuant to the provisions of this Act, all areas within existing municipal limits were assigned to the primary electric supplier therein. Areas outside of such municipal limits were either to be assigned or to be declared open for customer choice of supplier by action of the Georgia PSC pursuant to standards set forth in this Act. Consistent with such standards, the Georgia PSC has assigned substantially all of the land area in the state to a supplier. Notwithstanding such assignments, this Act provides that any new customer locating outside of 1973 municipal limits and having a connected load of at least 900 KWs may exercise a one-time choice for the life of the premises to receive electric service from the supplier of its choice.
Pursuant to the 1956 Utility Act, the Mississippi PSC issued "Grandfather Certificates" of public convenience and necessity to Mississippi Power and to six distribution rural cooperatives operating in southeastern Mississippi, then served in whole or in part by Mississippi Power, authorizing them to distribute electricity in certain specified geographically described areas of the state. The six cooperatives serve approximately 325,000 retail customers in a certificated area of approximately 10,300  square miles. In areas included in a "Grandfather Certificate," the utility holding such certificate may extend or maintain its electric system subject to certain regulatory approvals; extensions of facilities by such utility, or extensions of facilities into that area by other utilities, may not be made except upon a showing of, and a grant of a certificate of, public convenience and necessity. Areas included in a CPCN that are subsequently annexed to municipalities may continue to be served by the holder of the CPCN, irrespective of whether it has a franchise in the annexing municipality. On the other hand, the holder of the municipal franchise may not extend service into such newly annexed area without authorization by the Mississippi PSC.
Generally, the traditional electric operating companies have experienced, and expect to continue to experience, competition in their respective retail service territories in varying degrees from the development and deployment of alternative energy sources such as self-generation (as described below) and distributed generation technologies, as well as other factors.
Southern Power competes with investor-owned utilities, IPPs, and others for wholesale energy sales across various U.S. utility markets. The needs of these markets are driven by the demands of end users and the generation available. Southern Power's success in wholesale energy sales is influenced by various factors including reliability and availability of Southern Power's plants, availability of transmission to serve the demand, price, and Southern Power's ability to contain costs.

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As of December 31, 2018 , Alabama Power had cogeneration contracts in effect with nine industrial customers. Under the terms of these contracts, Alabama Power purchases excess energy generated by such companies. During 2018 , Alabama Power purchased approximately 99 million KWHs from such companies at a cost of $3 million .
As of December 31, 2018 , Georgia Power had contracts in effect with 28 small power producers whereby Georgia Power purchases their excess generation. During 2018 , Georgia Power purchased 2.1 billion KWHs from such companies at a cost of $140 million . Georgia Power also has PPAs for electricity with four cogeneration facilities. Payments are subject to reductions for failure to meet minimum capacity output. During 2018 , Georgia Power purchased 26 million KWHs at a cost of $0.8 million from these facilities.
Also during 2018 , Georgia Power purchased energy from three customer-owned generating facilities. These customers provide energy with no capacity commitment and are not dispatched by Georgia Power. During 2018 , Georgia Power purchased a total of 341 million KWHs from the three customers at a cost of approximately $28 million .
As of December 31, 2018 , Mississippi Power had a cogeneration agreement in effect with one of its industrial customers. Under the terms of this contract, Mississippi Power purchases any excess generation. During 2018 , Mississippi Power did not purchase any excess generation from this customer.
Natural Gas
Southern Company Gas' natural gas distribution utilities do not compete with other distributors of natural gas in their exclusive franchise territories but face competition from other energy products. Their principal competitors are electric utilities and fuel oil and propane providers serving the residential, commercial, and industrial markets in their service areas for customers who are considering switching to or from a natural gas appliance.
Competition for heating as well as general household and small commercial energy needs generally occurs at the initial installation phase when the customer or builder makes decisions as to which types of equipment to install. Customers generally use the chosen energy source for the life of the equipment.
Customer demand for natural gas could be affected by numerous factors, including:
changes in the availability or price of natural gas and other forms of energy;
general economic conditions;
energy conservation, including state-supported energy efficiency programs;
legislation and regulations;
the cost and capability to convert from natural gas to alternative energy products; and
technological changes resulting in displacement or replacement of natural gas appliances.
The natural gas-related programs generally emphasize natural gas as the fuel of choice for customers and seek to expand the use of natural gas through a variety of promotional activities. In addition, Southern Company Gas partners with third-party entities to market the benefits of natural gas appliances.
The availability and affordability of natural gas have provided cost advantages and further opportunity for growth of the businesses.
Seasonality
The demand for electric power and natural gas supply is affected by seasonal differences in the weather. While the electric power sales of some of the traditional electric operating companies peak in the summer, others peak in the winter. In the aggregate, electric power sales peak during the summer with a smaller peak during the winter. In most of the areas Southern Company Gas serves, natural gas demand peaks during the winter. As a result, the overall operating results of Southern Company, the traditional electric operating companies, Southern Power, and Southern Company Gas in the future may fluctuate substantially on a seasonal basis. In addition, the traditional electric operating companies, Southern Power, and Southern Company Gas have historically sold less power and natural gas when weather conditions are milder.
Regulation
States
The traditional electric operating companies and the natural gas distribution utilities are subject to the jurisdiction of their respective state PSCs or applicable state regulatory agencies. These regulatory bodies have broad powers of supervision and regulation over public utilities operating in the respective states, including their rates, service regulations, sales of securities (except for the Mississippi PSC), and, in the cases of the Georgia PSC and the Mississippi PSC, in part, retail service territories. See "Territory Served by the Southern Company System" and "Rate Matters" herein for additional information.

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Federal Power Act
The traditional electric operating companies, Southern Power Company and certain of its generation subsidiaries, and SEGCO are all public utilities engaged in wholesale sales of energy in interstate commerce and, therefore, are subject to the rate, financial, and accounting jurisdiction of the FERC under the Federal Power Act. The FERC must approve certain financings and allows an "at cost standard" for services rendered by system service companies such as SCS and Southern Nuclear. The FERC is also authorized to establish regional reliability organizations which enforce reliability standards, address impediments to the construction of transmission, and prohibit manipulative energy trading practices.
Alabama Power and Georgia Power are also subject to the provisions of the Federal Power Act or the earlier Federal Water Power Act applicable to licensees with respect to their hydroelectric developments. As of December 31, 2018 , among the hydroelectric projects subject to licensing by the FERC are 14 existing Alabama Power generating stations having an aggregate installed capacity of 1,670,000 KWs and 17 existing Georgia Power generating stations and one generating station partially owned by Georgia Power, with a combined aggregate installed capacity of 1,101,402 KWs.
In 2013, the FERC issued a new 30-year license to Alabama Power for Alabama Power's seven hydroelectric developments on the Coosa River (Weiss, Henry, Logan Martin, Lay, Mitchell, Jordan, and Bouldin). Alabama Power filed a petition requesting rehearing of the FERC order granting the relicense seeking revisions to several conditions of the license. Alabama Rivers Alliance, American Rivers, the Georgia Environmental Protection Division, and the Atlanta Regional Commission also filed petitions for rehearing of the FERC order. In 2016, the FERC issued an order granting in part and denying in part Alabama Power's rehearing request. The order also denied all of the other rehearing requests. Also in 2016, Alabama Rivers Alliance and American Rivers filed a second rehearing request and also filed a petition with the U.S. Court of Appeals for the District of Columbia Circuit for review of the license and the rehearing denial order. The FERC issued an order in 2016 denying the second rehearing request, and American Rivers and Alabama Rivers Alliance subsequently filed an appeal of that order at the U.S. Court of Appeals for the District of Columbia Circuit. The U.S. Court of Appeals for the District of Columbia Circuit consolidated the two appeals into one proceeding and, on July 6, 2018, vacated the FERC's 2013 order for the new 30-year license and remanded the proceeding to the FERC. Alabama Power continues to operate the Coosa River developments under annual licenses issued by the FERC. The ultimate outcome of this matter cannot be determined at this time.
In 2018 , Alabama Power continued the process of developing an application to relicense the Harris Dam project on the Tallapoosa River, which is expected to be filed with the FERC by November 30, 2021. The current Harris Dam project license will expire on November 30, 2023.
On May 31, 2018 , Georgia Power filed an application to relicense the Wallace Dam project on the Oconee River. The current Wallace Dam project license will expire on June 1, 2020. On July 3, 2018, Georgia Power filed a Notice of Intent to relicense the Lloyd Shoals project on the Ocmulgee River. The application to relicense the Lloyd Shoals project is expected to be filed with the FERC by December 31, 2021. The current Lloyd Shoals project license will expire on December 31, 2023. On December 18, 2018, Georgia Power filed applications to surrender the Langdale and Riverview hydroelectric projects on the Chattahoochee River upon their license expirations on December 31, 2023. Both projects together represent 1,520 KWs of Georgia Power's hydro fleet capacity.
Georgia Power and OPC also have a license, expiring in 2027, for the Rocky Mountain project, a pure pumped storage facility of 903,000 KW installed capacity. See PROPERTIES – "Jointly-Owned Facilities" in Item 2 herein for additional information.
Licenses for all projects, excluding those discussed above, expire in the years 2034-2066 in the case of Alabama Power's projects and in the years 2035-2044 in the case of Georgia Power's projects.
Upon or after the expiration of each license, the U.S. Government, by act of Congress, may take over the project or the FERC may relicense the project either to the original licensee or to a new licensee. In the event of takeover or relicensing to another, the original licensee is to be compensated in accordance with the provisions of the Federal Power Act, such compensation to reflect the net investment of the licensee in the project, not in excess of the fair value of the property, plus reasonable damages to other property of the licensee resulting from the severance therefrom of the property. The FERC may grant relicenses subject to certain requirements that could result in additional costs.
The ultimate outcome of these matters cannot be determined at this time.
Nuclear Regulation
Alabama Power, Georgia Power, and Southern Nuclear are subject to regulation by the NRC. The NRC is responsible for licensing and regulating nuclear facilities and materials and for conducting research in support of the licensing and regulatory process, as mandated by the Atomic Energy Act of 1954, as amended; the Energy Reorganization Act of 1974, as amended; and the Nuclear Nonproliferation Act of 1978, as amended; and in accordance with the National Environmental Policy Act of 1969, as amended, and other applicable statutes. These responsibilities also include protecting public health and safety, protecting the

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environment, protecting and safeguarding nuclear materials and nuclear power plants in the interest of national security, and assuring conformity with antitrust laws.
The NRC licenses for Georgia Power's Plant Hatch Units 1 and 2 expire in 2034 and 2038, respectively. The NRC licenses for Alabama Power's Plant Farley Units 1 and 2 expire in 2037 and 2041, respectively. The NRC licenses for Plant Vogtle Units 1 and 2 expire in 2047 and 2049, respectively.
In 2012, the NRC issued combined construction and operating licenses (COLs) for Plant Vogtle Units 3 and 4. Receipt of the COLs allowed full construction to begin. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Nuclear Construction" of Georgia Power in Item 7 herein and Note 2 to the financial statements under " Georgia Power Nuclear Construction " in Item 8 herein for additional information.
See Notes 3 and 6 to the financial statements under " Nuclear Insurance " and " Nuclear Decommissioning ," respectively, in Item 8 herein for information on nuclear insurance and nuclear decommissioning costs.
Environmental Laws and Regulations
The Southern Company system's operations are regulated by state and federal environmental agencies through a variety of laws and regulations governing air, water, land, and protection of other natural resources. Compliance with these existing environmental requirements involves significant capital and operating costs, a major portion of which is expected to be recovered through existing ratemaking provisions or through market-based contracts. There is no assurance, however, that all such costs will be recovered.
For Southern Company Gas, substantially all of these costs are related to former MGP sites, which are generally recovered through existing ratemaking provisions. See Note 3 to the financial statements under "Environmental Matters" in Item 8 herein for additional information.
Compliance with environmental laws and resulting regulations, including, but not limited to, proposed and existing regulations related to air quality, water quality, CCR, and global climate issues, has been, and will continue to be, a significant focus for each of the registrants and SEGCO. Compliance with any new or revised environmental laws and regulations could affect many areas of the traditional electric operating companies', Southern Power's, SEGCO's, and Southern Company Gas' operations. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Environmental Matters" of each of the registrants in Item 7 herein for additional information about environmental issues.
The Southern Company system's ultimate environmental compliance strategy and future environmental expenditures will depend on various factors, such as state adoption and implementation of requirements, the availability and cost of any deployed control technology, fuel prices, and the outcome of pending and/or future legal challenges. Compliance costs may result from the installation of additional environmental controls, closure and monitoring of CCR facilities, unit retirements, or changing fuel sources for certain existing units, as well as related upgrades to the transmission and distribution (electric and natural gas) systems. Environmental compliance spending over the next several years may differ materially from the amounts estimated. Such expenditures could affect results of operations, cash flows, and/or financial condition if such costs are not recovered on a timely basis through regulated rates for the traditional electric operating companies and the natural gas distribution utilities or through long-term wholesale agreements for the traditional electric operating companies and Southern Power. Further, higher costs that are recovered through regulated rates could contribute to reduced demand for energy, which could negatively affect results of operations, cash flows, and financial condition. Additionally, many commercial and industrial customers may also be affected by existing and future environmental requirements, which for some may have the potential to ultimately affect their demand for electricity and natural gas. See "Construction Program" herein and MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Environmental Matters" of each of the registrants in Item 7 herein for additional information. The ultimate outcome of these matters cannot be determined at this time.
Rate Matters
Rate Structure and Cost Recovery Plans
Electric
The rates and service regulations of the traditional electric operating companies are uniform for each class of service throughout their respective retail service territories. Rates for residential electric service are generally of the block type based upon KWHs used and include minimum charges. Residential and other rates contain separate customer charges. Rates for commercial service are presently of the block type and, for large customers, the billing demand is generally used to determine capacity and minimum bill charges. These large customers' rates are generally based upon usage by the customer and include rates with special features to encourage off-peak usage. Additionally, Alabama Power and Mississippi Power are generally allowed by

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their respective state PSCs to negotiate the terms and cost of service to large customers. Such terms and cost of service, however, are subject to final state PSC approval.
The traditional electric operating companies recover certain costs through a variety of forward-looking, cost-based rate mechanisms. Fuel and net purchased energy costs are recovered through specific fuel cost recovery provisions. These fuel cost recovery provisions are adjusted to reflect increases or decreases in such costs as needed or on schedules as required by the respective PSCs. Approved compliance, storm damage, and certain other costs are recovered at Alabama Power and Mississippi Power through specific cost recovery mechanisms approved by their respective PSCs. Certain similar costs at Georgia Power are recovered through various base rate tariffs as approved by the Georgia PSC. Costs not recovered through specific cost recovery mechanisms are recovered at Alabama Power and Mississippi Power through annual, formulaic cost recovery proceedings and at Georgia Power through periodic base rate proceedings.
See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Regulatory Matters" of Southern Company and each of the traditional electric operating companies in Item 7 herein and Note  2 to the financial statements in Item 8 herein for a discussion of rate matters and certain cost recovery mechanisms. Also, see Note  1 to the financial statements in Item 8 herein for a discussion of recovery of fuel costs, storm damage costs, and compliance costs through rate mechanisms.
See "Integrated Resource Planning" herein and Note 2 to the financial statements under " Georgia Power Integrated Resource Plan " in Item 8 herein for a discussion of Georgia PSC certification of new demand-side or supply-side resources for Georgia Power. In addition, see MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Nuclear Construction" of Georgia Power in Item 7 herein and Note 2 to the financial statements under " Georgia Power Nuclear Construction " in Item 8 herein for a discussion of the Georgia Nuclear Energy Financing Act and the Georgia PSC certification of Plant Vogtle Units 3 and 4, which have allowed Georgia Power to recover financing costs for construction of Plant Vogtle Units 3 and 4 since 2011.
See Note 2 to the financial statements under "Kemper County Energy Facility" in Item 8 herein and MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Kemper County Energy Facility – Rate Recovery" of Mississippi Power in Item 7 herein for information on cost recovery plans for the Kemper County energy facility.
The traditional electric operating companies and Southern Power Company and certain of its generation subsidiaries are authorized by the FERC to sell power to non-affiliates, including short-term opportunity sales, at market-based prices. Specific FERC approval must be obtained with respect to a market-based contract with an affiliate.
Mississippi Power serves long-term contracts with rural electric cooperative associations and a municipality located in southeastern Mississippi under cost-based electric tariffs which are subject to regulation by the FERC. The contracts with these wholesale customers represented 17.3% of Mississippi Power's total operating revenues in 2018 and are generally subject to 10-year rolling cancellation notices. Historically, these wholesale customers have acted as a group and any changes in contractual relationships for one customer are likely to be followed by the other wholesale customers.
Natural Gas
Southern Company Gas' natural gas distribution utilities are subject to regulation and oversight by their respective state regulatory agencies. Rates charged to these customers vary according to customer class (residential, commercial, or industrial) and rate jurisdiction. These agencies approve rates designed to provide each natural gas distribution utility the opportunity to generate revenues to recover all prudently-incurred costs, including a return on rate base sufficient to pay interest on debt, and provide a reasonable return.
With the exception of Atlanta Gas Light, which operates in a deregulated environment in which Marketers rather than a traditional utility sell natural gas to end-use customers and earns revenue by charging rates to its customers based primarily on monthly fixed charges that are set by the Georgia PSC, the earnings of the natural gas distribution utilities can be affected by customer consumption patterns that are largely a function of weather conditions and price levels for natural gas.
The natural gas distribution utilities, excluding Atlanta Gas Light, are authorized to use natural gas cost recovery mechanisms that adjust rates to reflect changes in the wholesale cost of natural gas and ensure recovery of all costs prudently incurred in purchasing natural gas for customers. In addition to natural gas cost recovery mechanisms, the natural gas distribution utilities have other cost recovery mechanisms, such as regulatory riders, which vary by utility but allow recovery of certain costs, such as those related to infrastructure replacement programs as well as environmental remediation and energy efficiency plans.
See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Regulatory Matters – Utility Regulation and Rate Design" of Southern Company Gas in Item 7 herein and Note 2 to the financial statements under "Southern Company Gas" in Item 8 herein for a discussion of rate matters and certain cost recovery mechanisms.

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Integrated Resource Planning
Each of the traditional electric operating companies continually evaluates its electric generating resources in order to ensure that it maintains a cost-effective and reliable mix of resources to meet the existing and future demand requirements of its customers. See "Environmental Laws and Regulations" above for a discussion of existing and potential environmental regulations that may impact the future generating resource needs of the traditional electric operating companies.
Alabama Power
Triennially, Alabama Power provides an IRP report to the Alabama PSC. This report overviews Alabama Power's resource planning process and contains information that serves as the foundation for certain decisions affecting Alabama Power's portfolio of supply-side and demand-side resources. The IRP report facilitates Alabama Power's ability to provide reliable and cost-effective electric service to customers, while accounting for the risks and uncertainties inherent in planning for resources sufficient to meet expected customer demand. Under State of Alabama law, a CPCN must be obtained from the Alabama PSC before Alabama Power constructs any new generating facility, unless such construction is deemed an ordinary extension in the usual course of business.
Georgia Power
Triennially, Georgia Power must file an IRP with the Georgia PSC that specifies how it intends to meet the future electric service needs of its customers through a combination of demand-side and supply-side resources. The Georgia PSC, under state law, must certify any new demand-side or supply-side resources for Georgia Power to receive cost recovery. Once certified, the lesser of actual or certified construction costs and purchased power costs is recoverable through rates. Certified costs may be excluded from recovery only on the basis of fraud, concealment, failure to disclose a material fact, imprudence, or criminal misconduct. See Note 2 to the financial statements under "Georgia Power – Rate Plans," " – Integrated Resource Plan," and " – Nuclear Construction " in Item 8 herein for additional information.
Mississippi Power
On February 6, 2018, the Mississippi PSC approved a settlement agreement related to cost recovery for the Kemper County energy facility, pursuant to which Mississippi Power filed a Reserve Margin Plan (RMP) on August 6, 2018. The RMP includes many of the same aspects of a traditional IRP, but the RMP also contains alternatives proposed by Mississippi Power to address its existing reserve capacity, which is greater than the level required to meet Mississippi Power's projected summer peak demand. Mississippi Power developed the alternatives by evaluating the economics of each unit in Mississippi Power's fleet, the opportunities currently available in the wholesale market, and the operational constraints of the Southern Company system. The ultimate outcome of this matter cannot be determined at this time. For additional information, see Note 2 to the financial statements under "Kemper County Energy Facility" in Item 8 herein.
Employee Relations
The Southern Company system had a total of 29,192 employees on its payroll at January 1, 2019.
 
Employees at
January 1, 2019
Alabama Power
6,650

Georgia Power
6,967

Mississippi Power
1,053

PowerSecure
1,743

SCS
3,799

Southern Company Gas
4,389

Southern Nuclear
3,870

Southern Power
491

Other
230

Total
29,192

The traditional electric operating companies and the natural gas distribution utilities have separate agreements with local unions of the IBEW and the Utilities Workers Union of America generally covering wages, working conditions, and procedures for handling grievances and arbitration. These agreements apply with certain exceptions to operating, maintenance, and construction employees.

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Alabama Power has agreements with the IBEW in effect through August 15, 2019. Upon notice given at least 60 days prior to that date, negotiations may be initiated with respect to agreement terms to be effective after such date.
Georgia Power has an agreement with the IBEW covering wages and working conditions, which is in effect through June 30, 2021.
Mississippi Power has an agreement with the IBEW covering wages and working conditions, which is in effect through May 1, 2019. In 2015, Mississippi Power signed a separate agreement with the IBEW related solely to the Kemper County energy facility; that current agreement is in effect through March 15, 2021. In August 2017, Mississippi Power signed an agreement with the IBEW that added several job classifications and provided guidelines related to the reorganization at the Kemper County energy facility.
Southern Nuclear has a five-year agreement with the IBEW covering certain employees at Plants Hatch and Plant Vogtle Units 1 and 2, which is in effect through June 30, 2021. A five-year agreement between Southern Nuclear and the IBEW representing certain employees at Plant Farley is in effect through August 15, 2019. Upon notice given at least 60 days prior to that date, negotiations may be initiated with respect to agreement terms to be effective after such date.
The agreements also make the terms of the pension plans for the companies discussed above subject to collective bargaining with the unions at either a five-year or a 10-year cycle, depending upon union and company actions.
The natural gas distribution utilities have separate agreements with local unions of the IBEW and Utilities Workers Union of America covering wages, working conditions, and procedures for handling grievances and arbitration. Nicor Gas' agreement with the IBEW is effective through February 29, 2020. Virginia Natural Gas' agreement with the IBEW is effective through May 15, 2020. The agreements also make the terms of the Southern Company Gas pension plan subject to collective bargaining with the unions when significant changes to the benefit accruals are considered by Southern Company Gas.

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Item 1A. RISK FACTORS
In addition to the other information in this Form 10-K, including MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL in Item 7 of each registrant, and other documents filed by Southern Company and/or its subsidiaries with the SEC from time to time, the following factors should be carefully considered in evaluating Southern Company and its subsidiaries. Such factors could affect actual results and cause results to differ materially from those expressed in any forward-looking statements made by, or on behalf of, Southern Company and/or its subsidiaries.
UTILITY REGULATORY, LEGISLATIVE, AND LITIGATION RISKS
Southern Company and its subsidiaries are subject to substantial state and federal governmental   regulation. Compliance with current and future regulatory requirements and   procurement of necessary approvals, permits, and certificates may result in   substantial costs to Southern Company and its subsidiaries.
Southern Company and its subsidiaries are subject to substantial regulation from federal, state, and local regulatory agencies and are required to comply with numerous laws and regulations and to obtain numerous permits, approvals, and certificates from governmental agencies. The traditional electric operating companies and the natural gas distribution utilities seek to recover their costs (including a reasonable return on invested capital) through their retail rates, which must be approved by the applicable state PSC or other applicable state regulatory agency. A state PSC or other applicable state regulatory agency, in a future rate proceeding, may alter the timing or amount of certain costs for which recovery is allowed or modify the current authorized rate of return. Rate refunds may also be required. Additionally, the rates charged to wholesale customers by the traditional electric operating companies and by Southern Power and the rates charged to natural gas transportation customers by Southern Company Gas' pipeline investments and for some of its storage assets must be approved by the FERC. These wholesale rates could be affected by changes to Southern Power's and the traditional electric operating companies' ability to conduct business pursuant to FERC market-based rate authority. Retaining this authority from the FERC is important to the traditional electric operating companies' and Southern Power's ability to remain competitive in the wholesale electric markets.
The impact of any future revision or changes in interpretations of existing regulations or the adoption of new laws and regulations applicable to Southern Company or any of its subsidiaries is uncertain. Changes in regulation or the imposition of additional regulations could influence the operating environment of Southern Company and its subsidiaries and may result in substantial costs or otherwise negatively affect their results of operations.
The Southern Company system's costs of compliance with environmental laws and satisfying related AROs are significant. The costs of compliance with current and future environmental laws and related AROs and the incurrence of environmental liabilities could negatively impact the net income, cash flows, and financial condition of the registrants.
The Southern Company system's operations are subject to extensive regulation by state and federal environmental agencies through a variety of laws and regulations. Compliance with existing environmental requirements involves significant capital and operating costs including the settlement of AROs, a major portion of which is expected to be recovered through existing ratemaking provisions or through market-based contracts. There is no assurance, however, that all such costs will be recovered. The registrants expect future compliance expenditures will continue to be significant.
The EPA has adopted and is implementing regulations governing air and water quality under the Clean Air Act and regulations governing cooling water intake structures and effluent guidelines for steam electric generating plants under the Clean Water Act. The EPA has also adopted regulations governing the disposal of CCR, including coal ash and gypsum, in landfills and surface impoundments at active generating power plants. The cost estimates for AROs related to the disposal of CCR are based on information using various assumptions related to closure and post-closure costs, timing of future cash outlays, inflation and discount rates, and the potential methods for complying with the CCR Rule. The traditional electric operating companies will continue to periodically update their ARO cost estimates.
Additionally, environmental laws and regulations covering the handling and disposal of waste and release of hazardous substances could require the Southern Company system to incur substantial costs to clean up affected sites, including certain current and former operating sites, and locations affected by historical operations or subject to contractual obligations.
Existing environmental laws and regulations may be revised or new environmental laws and regulations may be adopted or become applicable to the Southern Company system. In addition, existing environmental laws and regulations may be impacted by related legal challenges.
Litigation over environmental issues and claims of various types, including property damage, personal injury, common law nuisance, and citizen enforcement of environmental requirements has occurred throughout the U.S. This litigation has included claims for damages alleged to have been caused by CO 2 and other emissions, CCR, releases of regulated substances, and alleged exposure to regulated substances, and/or requests for injunctive relief in connection with such matters.

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Compliance with any new or revised environmental laws or regulations could affect many areas of the Southern Company system's operations. The Southern Company system's ultimate environmental compliance strategy and future environmental expenditures will depend on various factors, such as state adoption and implementation of requirements, the availability and cost of any deployed control technology, and the outcome of pending and/or future legal challenges. Compliance costs may result from the installation of additional environmental controls, closure and monitoring of CCR facilities, unit retirements, or changing fuel sources for certain existing units, as well as related upgrades to the Southern Company system's transmission and distribution (electric and natural gas) systems. Environmental compliance spending over the next several years may differ materially from the amounts estimated. Such expenditures could affect results of operations, cash flows, and/or financial condition if such costs are not recovered on a timely basis through regulated rates for the traditional electric operating companies and the natural gas distribution utilities or through long-term wholesale agreements for the traditional electric operating companies and Southern Power. Further, higher costs that are recovered through regulated rates could contribute to reduced demand for energy, which could negatively affect results of operations, cash flows, and financial condition. Additionally, many commercial and industrial customers may also be affected by existing and future environmental requirements, which for some may have the potential to ultimately affect their demand for electricity or natural gas.
The Southern Company system may be exposed to regulatory and financial risks related to the impact of GHG legislation, regulation, and emission reduction goals.
The EPA has published rules limiting CO 2  emissions from new, modified, and reconstructed fossil fuel-fired electric generating units and guidelines for states to develop plans to meet EPA-mandated CO 2 emission performance standards for existing units (known as the Clean Power Plan or CPP). On August 31, 2018, the EPA published a proposed rule known as the Affordable Clean Energy (ACE) Rule, which is intended to replace a regulation enacted in 2015 known as the Clean Power Plan (CPP), that would limit CO 2 emissions from existing fossil fuel-fired electric generating units. The CPP has been stayed by the U.S. Supreme Court since 2016. The ACE Rule would require states to develop GHG unit-specific emission rate standards based on heat-rate efficiency improvements for existing fossil fuel-fired steam units. As proposed, combustion turbines, including natural gas combined cycles, are not affected sources. As of January 1, 2019, the Southern Company system has ownership interests in 40 fossil fuel-fired steam units to which the proposed ACE Rule is applicable. The ultimate impact of this rule to the Southern Company system is currently unknown and will depend on changes between the proposal and the final rule, subsequent state plan developments and requirements, and any associated legal challenges.
The EPA also has proposed a review of final rules adopted in 2015 to establish performance standards for new, modified, and reconstructed electric utility generating units. The impact of any changes will depend on the content of any final rule adopted by the EPA and the outcome of any related legal challenges.
In April 2018, Southern Company established an intermediate goal of a 50% reduction in carbon emissions from 2007 levels by 2030 and a long-term goal of low- to no-carbon operations by 2050. To achieve these goals, the Southern Company system expects to continue growing its renewable energy portfolio, optimize technology advancements to modernize its transmission and distribution systems, increase the use of natural gas for generation, complete ongoing construction projects, including Georgia Power's interest in Plant Vogtle Units 3 and 4, invest in energy efficiency, and continue research and development efforts focused on technologies to lower GHG emissions. The Southern Company system's ability to achieve these goals also will be dependent on many external factors, including supportive national energy policies, low natural gas prices, and the development, deployment, and advancement of relevant energy technologies.
Costs associated with GHG legislation, regulation, and emission reduction goals could be significant. However, the ultimate impact will depend on various factors, such as state adoption and implementation of requirements, low natural gas prices, the development, deployment, and advancement of relevant energy technologies, the ability to recover costs through existing ratemaking provisions, and the outcome of pending and/or future legal challenges.
Because natural gas is a fossil fuel with lower carbon content relative to other fossil fuels, future GHG constraints, including, but not limited to, the imposition of a carbon tax, may create additional demand for natural gas, both for production of electricity and direct use in homes and businesses. Future GHG constraints designed to minimize emissions from natural gas could likewise result in increased costs to the Southern Company system and affect the demand for natural gas as well as the prices charged to customers and the competitive position of natural gas.

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The net income of Southern Company, the traditional electric operating companies, and Southern Power could be negatively impacted by changes in regulations related to transmission planning processes and competition in the wholesale electric markets.
The traditional electric operating companies currently own and operate transmission facilities as part of a vertically integrated utility. A small percentage of transmission revenues are collected through the wholesale electric tariff but the majority are collected through retail rates. FERC rules pertaining to regional transmission planning and cost allocation present challenges to transmission planning and the wholesale market structure. The key impacts of these rules include:
possible disruption of the integrated resource planning processes within the states in the Southern Company system's service territory;
delays and additional processes for developing transmission plans; and
possible impacts on state jurisdiction of approving, certifying, and pricing new transmission facilities.
The FERC rules related to transmission are intended to spur the development of new transmission infrastructure to promote and encourage the integration of renewable sources of supply as well as facilitate competition in the wholesale market by providing more choices to wholesale power customers. Technology changes in the power and fuel industries continue to create significant impacts to wholesale transaction cost structures. The impact of these and other such developments and the effect of changes in levels of wholesale supply and demand are uncertain. The financial condition, net income, and cash flows of Southern Company, the traditional electric operating companies, and Southern Power could be adversely affected by these and other changes.
The traditional electric operating companies and Southern Power could be subject to higher costs as a result of implementing and maintaining compliance with the North American Electric Reliability Corporation mandatory reliability standards along with possible associated penalties for non-compliance.
Owners and operators of bulk power systems, including the traditional electric operating companies, are subject to mandatory reliability standards enacted by the North American Electric Reliability Corporation and enforced by the FERC. Compliance with or changes in the mandatory reliability standards may subject the traditional electric operating companies and Southern Power to higher operating costs and/or increased capital expenditures. If any traditional electric operating company or Southern Power is found to be in noncompliance with these standards, such traditional electric operating company or Southern Power could be subject to sanctions, including substantial monetary penalties.
OPERATIONAL RISKS
The financial performance of Southern Company and its subsidiaries may be adversely affected if the subsidiaries are unable to successfully operate their facilities or perform certain corporate functions.
The financial performance of Southern Company and its subsidiaries depends on the successful operation of the electric generation, transmission, and distribution facilities and natural gas distribution and storage facilities and the successful performance of necessary corporate functions. There are many risks that could affect these operations and performance of corporate functions, including:
operator error or failure of equipment or processes;
accidents;
operating limitations that may be imposed by environmental or other regulatory requirements or in connection with joint owner arrangements;
labor disputes;
physical attacks;
fuel or material supply interruptions and/or shortages;
transmission disruption or capacity constraints, including with respect to the Southern Company system's and third parties' transmission, storage, and transportation facilities;
compliance with mandatory reliability standards, including mandatory cyber security standards;
implementation of new technologies;
information technology system failures;
cyber intrusions;
environmental events, such as spills or releases; and
catastrophic events such as fires, earthquakes, explosions, floods, tornadoes, hurricanes and other storms, droughts, pandemic health events, or other similar occurrences.
A decrease or elimination of revenues from the electric generation, transmission, or distribution facilities or natural gas distribution or storage facilities or an increase in the cost of operating the facilities would reduce the net income and cash flows and could adversely impact the financial condition of the affected registrant.

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Operation of nuclear facilities involves inherent risks, including environmental,   safety, health, regulatory, natural disasters, cyber intrusions or physical attacks, and financial risks, that could result in fines or the   closure of the nuclear units owned by Alabama Power or Georgia Power   and which may present potential exposures in excess of insurance coverage.
Alabama Power owns, and contracts for the operation of, two nuclear units and Georgia Power holds undivided interests in, and contracts for the operation of, four existing nuclear units. The six existing units are operated by Southern Nuclear and represent approximately 3,680 MWs, or 8% of the Southern Company system's electric generation capacity at January 1, 2019. In addition, these units generated approximately 25% of the total KWHs generated by each of Alabama Power and Georgia Power in the year ended December 31, 2018 . In addition, Southern Nuclear, on behalf of Georgia Power and the other Vogtle Owners, is managing the construction of Plant Vogtle Units 3 and 4. Due solely to the increase in nuclear generating capacity, the below risks are expected to increase incrementally once Plant Vogtle Units 3 and 4 are operational. Nuclear facilities are subject to environmental, safety, health, operational, and financial risks such as:
the potential harmful effects on the environment and human health and safety resulting from a release of radioactive materials in connection with the operation of nuclear facilities and the storage, handling, and disposal of radioactive material, including spent nuclear fuel;
uncertainties with respect to the ability to dispose of spent nuclear fuel and the need for longer term on-site storage;
uncertainties with respect to the technological and financial aspects of decommissioning nuclear plants at the end of licensed lives and the ability to maintain and anticipate adequate capital reserves for decommissioning;
limitations on the amounts and types of insurance commercially available to cover losses that might arise in connection with the nuclear operations of Alabama Power and Georgia Power or those of other commercial nuclear facility owners in the U.S.;
potential liabilities arising out of the operation of these facilities;
significant capital expenditures relating to maintenance, operation, security, and repair of these facilities, including repairs and upgrades required by the NRC;
actual or threatened cyber intrusions or physical attacks; and
the potential impact of an accident or natural disaster.
It is possible that damages, decommissioning, or other costs could exceed the amount of decommissioning trusts or external insurance coverage, including statutorily required nuclear incident insurance.
The NRC has broad authority under federal law to impose licensing and safety-related requirements for the operation of nuclear generation facilities. In the event of non-compliance, the NRC has the authority to impose fines and/or shut down any unit, depending upon its assessment of the severity of the situation, until compliance is achieved. NRC orders or regulations related to increased security measures and any future safety requirements promulgated by the NRC could require Alabama Power and Georgia Power to make substantial operating and capital expenditures at their nuclear plants. In addition, if a serious nuclear incident were to occur, it could result in substantial costs to Alabama Power or Georgia Power and Southern Company. A major incident at a nuclear facility anywhere in the world could cause the NRC to delay or prohibit construction of new nuclear units or require additional safety measures at new and existing units. Moreover, a major incident at any nuclear facility in the U.S., including facilities owned and operated by third parties, could require Alabama Power and Georgia Power to make material contributory payments.
In addition, actual or potential threats of cyber intrusions or physical attacks could result in increased nuclear licensing or compliance costs that are difficult to predict.
Transporting and storing natural gas involves risks that may result in accidents and other operating risks and costs.
Southern Company Gas' natural gas distribution and storage activities involve a variety of inherent hazards and operating risks, such as leaks, accidents, explosions, and mechanical problems, which could result in serious injury to employees and non-employees, loss of life, significant damage to property, environmental pollution, and impairment of its operations. The location of pipelines and storage facilities near populated areas could increase the level of damage resulting from these risks. Additionally, these pipeline and storage facilities are subject to various state and other regulatory requirements. Failure to comply with these regulatory requirements could result in substantial monetary penalties or potential early retirement of storage facilities, which could trigger an associated impairment. The occurrence of any of these events not fully covered by insurance or otherwise could adversely affect Southern Company Gas' and Southern Company's financial condition and results of operations.
Physical attacks, both threatened and actual, could impact the ability of the Subsidiary Registrants to operate and could adversely affect financial results and liquidity.
The Subsidiary Registrants face the risk of physical attacks, both threatened and actual, against their respective generation and storage facilities and the transmission and distribution infrastructure used to transport energy, which could negatively impact

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their ability to generate, transport, and deliver power, or otherwise operate their respective facilities, or, with respect to Southern Company Gas, its ability to distribute or store natural gas, or otherwise operate its facilities, in the most efficient manner or at all. In addition, physical attacks against third-party providers could have a similar effect on Southern Company and its subsidiaries.
Despite the implementation of robust security measures, all assets are potentially vulnerable to disability, failures, or unauthorized access due to human error, natural disasters, technological failure, or internal or external physical attacks. If assets were to fail, be physically damaged, or be breached and were not restored in a timely manner, the affected Subsidiary Registrant may be unable to fulfill critical business functions. Moreover, the amount and scope of insurance maintained against losses resulting from any such events or physical security breaches may not be sufficient to cover losses or otherwise adequately compensate for any disruptions to business that could result.
These events could harm the reputation of and negatively affect the financial results of the registrants through lost revenues and costs to repair damage, if such costs cannot be recovered.
An information security incident, including a cybersecurity breach, or the failure of one or more key information technology systems, networks, or processes could impact the ability of the registrants to operate and could adversely affect financial results and liquidity.
Information security risks have generally increased in recent years as a result of the proliferation of new technology and increased sophistication and frequency of cyber attacks and data security breaches. The Subsidiary Registrants operate in highly regulated industries that require the continued operation of sophisticated information technology systems and network infrastructure, which are part of interconnected distribution systems. Because of the critical nature of the infrastructure, increased connectivity to the internet, and technology systems' inherent vulnerability to disability or failures due to hacking, viruses, acts of war or terrorism, or other types of data security breaches, Southern Company and its subsidiaries face a heightened risk of cyberattack. Parties that wish to disrupt the U.S. bulk power system or Southern Company system operations could view these computer systems, software, or networks as targets. The registrants and their third-party vendors have been subject, and will likely continue to be subject, to attempts to gain unauthorized access to their information technology systems and confidential data or to attempts to disrupt utility operations. As a result, Southern Company and its subsidiaries face on-going threats to their assets, including assets deemed critical infrastructure, where databases and systems have been, and will likely continue to be, subject to advanced computer viruses or other malicious codes, unauthorized access attempts, phishing, and other cyber attacks. While there have been immaterial incidents of phishing and attempted financial fraud across the Southern Company system, there has been no material impact on business or operations from these attacks. However, the registrants cannot guarantee that security efforts will prevent breaches, operational incidents, or other breakdowns of information technology systems and network infrastructure and cannot provide any assurance that such incidents will not have a material adverse effect in the future.
In addition, in the ordinary course of business, Southern Company and its subsidiaries collect and retain sensitive information, including personally identifiable information about customers, employees, and stockholders, and other confidential information. In some cases, administration of certain functions may be outsourced to third-party service providers that could also be targets of cyber attacks. Generally, Southern Company and its subsidiaries enter certain contractual security guarantees and assurances with these third parties to help ensure the security and safety of this information.
Despite the implementation of robust security measures, all assets are potentially vulnerable to disability, failures, or unauthorized access due to human error, natural disasters, technological failure, or internal or external cyber attacks. If assets were to fail or be breached and were not restored in a timely manner, the affected registrant may be unable to fulfill critical business functions, and sensitive and other data could be compromised. Any cyber breach or theft, damage, or improper disclosure of sensitive electronic data may also subject the affected registrant to penalties and claims from regulators or other third parties. Moreover, the amount and scope of insurance maintained against losses resulting from any such events or security breaches may not be sufficient to cover losses or otherwise adequately compensate for any disruptions to business that could result. In addition, as cybercriminals become more sophisticated, the cost of proactive defensive measures may increase.
These events could negatively affect the financial results of the registrants through lost revenues, costs to recover and repair damage, costs associated with governmental actions in response to such attacks, and litigation costs if such costs cannot be recovered through insurance or otherwise.
The Southern Company system may not be able to obtain adequate natural gas, fuel supplies, and other resources required to operate the traditional electric operating companies' and Southern Power's electric generating plants or serve Southern Company Gas' natural gas customers.
The traditional electric operating companies and Southern Power purchase fuel, including coal, natural gas, uranium, fuel oil, and biomass, as applicable, from a number of suppliers. Additionally, the traditional electric operating companies and Southern

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Power need adequate access to water, which is drawn from nearby sources to aid in the production of electricity and, once it is used, returned to its source. Disruption in the delivery of fuel, including disruptions as a result of, among other things, transportation delays, weather, labor relations, force majeure events, or environmental regulations affecting any of these fuel suppliers, or the availability of water, could limit the ability of the traditional electric operating companies and Southern Power to operate certain facilities, which could result in higher fuel and operating costs and potentially reduce the net income of the affected traditional electric operating company or Southern Power and Southern Company.
Southern Company Gas' primary business is the distribution and sale of natural gas through its regulated and unregulated subsidiaries. Natural gas supplies can be subject to disruption in the event production or distribution is curtailed, such as in the event of a hurricane or a pipeline failure. Southern Company Gas also relies on natural gas pipelines and other storage and transportation facilities owned and operated by third parties to deliver natural gas to wholesale markets and to Southern Company Gas' distribution systems. The availability of shale gas and potential regulations affecting its accessibility may have a material impact on the supply and cost of natural gas. Disruption in natural gas supplies could limit the ability to fulfill these contractual obligations.
The traditional electric operating companies and Southern Power have become more dependent on natural gas for a portion of their electric generating capacity and expect to continue to increase such dependence. In many instances, the cost of purchased power for the traditional electric operating companies and Southern Power is influenced by natural gas prices. Historically, natural gas prices have been more volatile than prices of other fuels. In recent years, domestic natural gas prices have been depressed by robust supplies, including production from shale gas. These market conditions, together with additional regulation of coal-fired generating units, have increased the traditional electric operating companies' reliance on natural gas-fired generating units.
The traditional electric operating companies are also dependent on coal for a portion of their electric generating capacity. The traditional electric operating companies depend on coal supply contracts, and the counterparties to these agreements may not fulfill their obligations to supply coal to the traditional electric operating companies. The suppliers may experience financial or technical problems that inhibit their ability to fulfill their obligations. In addition, the suppliers may not be required to supply coal under certain circumstances, such as in the event of a natural disaster. If the traditional electric operating companies are unable to obtain their coal requirements under these contracts, they may be required to purchase their coal requirements at higher prices, which may not be recoverable through rates.
The revenues of Southern Company, the traditional electric operating companies, and Southern   Power depend in   part on sales under PPAs. The failure of a counterparty to one of these PPAs to   perform its obligations, the failure of the traditional electric operating companies or Southern Power to satisfy minimum requirements under the PPAs, or the failure to renew the PPAs or successfully remarket the related generating capacity could have a negative   impact on the net income and cash flows of the affected traditional electric operating company   or Southern Power and of Southern Company.
Most of Southern Power's generating capacity has been sold to purchasers under PPAs. Southern Power's top three customers, Georgia Power, Duke Energy Corporation, and Southern California Edison accounted for 9.8%, 6.8%, and 6.2%, respectively, of Southern Power's total revenues for the year ended December 31, 2018 . In addition, the traditional electric operating companies enter into PPAs with non-affiliated parties. Revenues are dependent on the continued performance by the purchasers of their obligations under these PPAs. The failure of one of the purchasers to perform its obligations, including as a result of a general default or bankruptcy, could have a negative impact on the net income and cash flows of the affected traditional electric operating company or Southern Power and of Southern Company. Although the credit evaluations undertaken and contractual protections implemented by Southern Power and the traditional electric operating companies take into account the possibility of default by a purchaser, actual exposure to a default by a purchaser may be greater than predicted or specified in the applicable contract. See Note 1 to the financial statements under " Revenues Concentration of Revenue " in Item 8 herein for additional information on Pacific Gas & Electric Company's bankruptcy filing.
Additionally, neither Southern Power nor any traditional electric operating company can predict whether the PPAs will be renewed at the end of their respective terms or on what terms any renewals may be made. The failure of the traditional electric operating companies or Southern Power to satisfy minimum operational or availability requirements under these PPAs could result in payment of damages or termination of the PPAs.
The asset management arrangements between Southern Company Gas' wholesale gas services and its customers, including the natural gas distribution utilities, may not be renewed or may be renewed at lower levels, which could have a significant impact on Southern Company Gas' financial results.
Southern Company Gas' wholesale gas services currently manages the storage and transportation assets of the natural gas distribution utilities (except Nicor Gas) as well as certain non-affiliated customers. Southern Company Gas' wholesale gas

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services has a concentration of credit risk for services it provides to its counterparties, which is generally concentrated in 20 of its counterparties.
The profits earned from the management of affiliate assets are shared with the respective affiliate's customers (and for Atlanta Gas Light with the Georgia PSC's Universal Service Fund), except for Chattanooga Gas where wholesale gas services are provided under annual fixed-fee agreements. These asset management agreements are subject to regulatory approval and such agreements may not be renewed or may be renewed with less favorable terms.
The financial results of Southern Company Gas' wholesale gas services could be significantly impacted if any of its agreements with its affiliated or non-affiliated customers are not renewed or are amended or renewed with less favorable terms. Sustained low natural gas prices could reduce the demand for these types of asset management arrangements.
Increased competition could negatively impact Southern Company's and its subsidiaries' revenues, results of operations, and financial condition.
The Southern Company system faces increasing competition from other companies that supply energy or generation and storage technologies. Changes in technology may make the Southern Company system's electric generating facilities owned by the traditional electric operating companies and Southern Power less competitive. Southern Company Gas' business is dependent on natural gas prices remaining competitive as compared to other forms of energy. Southern Company Gas also faces competition in its unregulated markets.
A key element of the business models of the traditional electric operating companies and Southern Power is that generating power at central station power plants achieves economies of scale and produces power at a competitive cost. There are distributed generation and storage technologies that produce and store power, including fuel cells, microturbines, wind turbines, solar cells, and batteries. Advances in technology or changes in laws or regulations could reduce the cost of these or other alternative methods of producing power to a level that is competitive with that of most central station power electric production or result in smaller-scale, more fuel efficient, and/or more cost effective distributed generation that allows for increased self-generation by customers. Broader use of distributed generation by retail energy customers may also result from customers' changing perceptions of the merits of utilizing existing generation technology or tax or other economic incentives. Additionally, a state PSC or legislature may modify certain aspects of the traditional electric operating companies' business as a result of these advances in technology.
It is also possible that rapid advances in central station power generation technology could reduce the value of the current electric generating facilities owned by the traditional electric operating companies and Southern Power. Changes in technology could also alter the channels through which electric customers buy or utilize power, which could reduce the revenues or increase the expenses of Southern Company, the traditional electric operating companies, or Southern Power.
Southern Company Gas' gas marketing services is affected by competition from other energy marketers providing similar services in Southern Company Gas' service territories, most notably in Illinois and Georgia. Southern Company Gas' wholesale gas services competes for sales with national and regional full-service energy providers, energy merchants and producers, and pipelines based on the ability to aggregate competitively-priced commodities with transportation and storage capacity. Southern Company Gas competes with natural gas facilities in the Gulf Coast region of the U.S., as the majority of the existing and proposed high deliverability salt-dome natural gas storage facilities in North America are located in the Gulf Coast region.
If new technologies become cost competitive and achieve sufficient scale, the market share of the Subsidiary Registrants could be eroded, and the value of their respective electric generating facilities or natural gas distribution and storage facilities could be reduced. Additionally, Southern Company Gas' market share could be reduced if Southern Company Gas cannot remain price competitive in its unregulated markets. If state PSCs or other applicable state regulatory agencies fail to adjust rates to reflect the impact of any changes in loads, increasing self-generation, and the growth of distributed generation, the financial condition, results of operations, and cash flows of Southern Company and the affected traditional electric operating company or Southern Company Gas could be materially adversely affected.
Failure to attract and retain an appropriately qualified workforce could negatively impact Southern Company's and its subsidiaries' results of operations.
Events such as an aging workforce without appropriate replacements, mismatch of skill sets to future needs, or unavailability of contract resources may lead to operating challenges such as lack of resources, loss of knowledge, and a lengthy time period associated with skill development, including with the workforce needs associated with major construction projects and ongoing operations. The Southern Company system's costs, including costs for contractors to replace employees, productivity costs, and safety costs, may rise. Failure to hire and adequately obtain replacement employees, including the ability to transfer significant internal historical knowledge and expertise to the new employees, or the future availability and cost of contract labor may adversely affect Southern Company and its subsidiaries' ability to manage and operate their businesses. If Southern Company

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and its subsidiaries are unable to successfully attract and retain an appropriately qualified workforce, results of operations could be negatively impacted.
CONSTRUCTION RISKS
The registrants may incur   additional costs or delays in the construction of new plants or other facilities and may not be able to recover their investments. Also, existing facilities of   the Subsidiary Registrants require   ongoing expenditures, including those to meet AROs and other environmental standards and goals.
General
The businesses of the registrants require substantial expenditures for investments in new facilities and, for the traditional electric operating companies, capital improvements to transmission, distribution, and generation facilities, for Southern Power, capital improvements to generation facilities, and, for Southern Company Gas, capital improvements to natural gas distribution and storage facilities. These expenditures also include those to meet AROs and environmental standards and goals. Certain of the traditional electric operating companies and Southern Power are in the process of constructing new generating facilities and adding environmental controls equipment at existing generating facilities. Southern Company Gas is replacing certain pipelines in its natural gas distribution system and is involved in two new gas pipeline construction projects. The Southern Company system intends to continue its strategy of developing and constructing other new facilities, expanding or updating existing facilities, and adding environmental control equipment. These types of projects are long term in nature and in some cases may include the development and construction of facilities with designs that have not been finalized or previously constructed. The completion of these types of projects without delays or significant cost overruns is subject to substantial risks, including:
shortages, increased costs, or inconsistent quality of equipment, materials, and labor;
changes in labor costs, availability, and productivity;
challenges related to management of contractors, subcontractors, or vendors;
work stoppages;
contractor or supplier delay;
non-performance under construction, operating, or other agreements;
delays in or failure to receive necessary permits, approvals, tax credits, and other regulatory authorizations;
delays in start-up activities (including major equipment failure and system integration) and/or operational performance;
operational readiness, including specialized operator training and required site safety programs;
impacts of new and existing laws and regulations, including environmental laws and regulations;
the outcome of any legal challenges to projects, including legal challenges to regulatory approvals;
failure to construct in accordance with permitting and licensing requirements (including satisfaction of NRC requirements);
failure to satisfy any environmental performance standards and the requirements of tax credits and other incentives;
continued public and policymaker support for projects;
adverse weather conditions or natural disasters;
engineering or design problems;
changes in project design or scope;
environmental and geological conditions;
delays or increased costs to interconnect facilities to transmission grids; and
increased financing costs as a result of changes in market interest rates or as a result of project delays.
If a Subsidiary Registrant is unable to complete the development or construction of a project or decides to delay or cancel construction of a project, it may not be able to recover its investment in that project and may incur substantial cancellation payments under equipment purchase orders or construction contracts, as well as other costs associated with the closure and/or abandonment of the construction project. See Note 2 to the financial statements under "Kemper County Energy Facility" for information related to the abandonment of and related closure activities and costs for the mine and gasifier-related assets at the Kemper County energy facility.
Additionally, each Southern Company Gas pipeline construction project involves separate joint venture participants, Southern Power participates in partnership agreements with respect to renewable energy projects, and Georgia Power jointly owns Plant Vogtle Units 3 and 4 with other co-owners. Any failure by a partner or co-owner to perform its obligations under the applicable agreements could have a material negative impact on the applicable project under construction. In addition, partnership and joint ownership agreements may provide partners or co-owners with certain decision-making authority in connection with projects under construction, including rights to cause the cancellation of a construction project under certain circumstances.
Even if a construction project (including a joint venture construction project) is completed, the total costs may be higher than estimated and may not be recoverable through regulated rates, if applicable. In addition, construction delays and contractor

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performance shortfalls can result in the loss of revenues and may, in turn, adversely affect the net income and financial position of the affected registrant. See Note 2 to the financial statements under "FERC Matters – Southern Company Gas" for information regarding the Atlantic Coast Pipeline construction delays and the associated cost increase.
Construction delays could result in the loss of otherwise available tax credits and incentives. Furthermore, if construction projects are not completed according to specification, a registrant may incur liabilities and suffer reduced plant efficiency, higher operating costs, and reduced net income.
Once facilities become operational, ongoing capital expenditures are required to maintain reliable levels of operation. Significant portions of the traditional electric operating companies' existing facilities were constructed many years ago. Older equipment, even if maintained in accordance with good engineering practices, may require significant expenditures to maintain efficiency, to comply with changing environmental requirements, to provide safe and reliable operations, and/or to meet related retirement obligations.
The largest construction project currently underway in the Southern Company system is Plant Vogtle Units 3 and 4.
Plant Vogtle Units 3 and 4 construction and rate recovery
Background
In 2009, the Georgia PSC certified construction of Plant Vogtle Units 3 and 4. Georgia Power holds a 45.7% ownership interest in Plant Vogtle Units 3 and 4. In 2012, the NRC issued the related combined construction and operating licenses, which allowed full construction of the two AP1000 nuclear units (with electric generating capacity of approximately 1,100 MWs each) and related facilities to begin. Until March 2017, construction on Plant Vogtle Units 3 and 4 continued under the Vogtle 3 and 4 Agreement, which was a substantially fixed price agreement. In March 2017, the EPC Contractor filed for bankruptcy protection under Chapter 11 of the U.S. Bankruptcy Code.
In connection with the EPC Contractor's bankruptcy filing, Georgia Power, acting for itself and as agent for the Vogtle Owners, entered into the Interim Assessment Agreement with the EPC Contractor to allow construction to continue. The Interim Assessment Agreement expired in July 2017 when Georgia Power, acting for itself and as agent for the other Vogtle Owners, and the EPC Contractor entered into the Vogtle Services Agreement. Under the Vogtle Services Agreement, Westinghouse provides facility design and engineering services, procurement and technical support, and staff augmentation on a time and materials cost basis.
In October 2017, Georgia Power, acting for itself and as agent for the other Vogtle Owners, executed the Bechtel Agreement, a cost reimbursable plus fee arrangement, whereby Bechtel is reimbursed for actual costs plus a base fee and an at-risk fee, which is subject to adjustment based on Bechtel's performance against cost and schedule targets.
Cost and Schedule
Georgia Power's approximate proportionate share of the remaining estimated capital cost to complete Plant Vogtle Units 3 and 4 by the expected in-service dates of November 2021 and November 2022, respectively, is as follows:
 
(in billions)
Base project capital cost forecast (a)(b)
$
8.0

Construction contingency estimate
0.4

Total project capital cost forecast (a)(b)
8.4

Net investment as of December 31, 2018 (b)
(4.6
)
Remaining estimate to complete (a)
$
3.8

(a)
Excludes financing costs expected to be capitalized through AFUDC of approximately $315 million .
(b)
Net of $1.7 billion received from Toshiba under the Guarantee Settlement Agreement and approximately $188 million in related Customer Refunds.
Georgia Power estimates that its financing costs for construction of Plant Vogtle Units 3 and 4 will total approximately $3.1 billion , of which $1.9 billion had been incurred through December 31, 2018.
As construction continues, challenges with management of contractors, subcontractors, and vendors; labor productivity, availability, and/or cost escalation; procurement, fabrication, delivery, assembly, and/or installation and testing, including any required engineering changes, of plant systems, structures, and components (some of which are based on new technology that only recently began initial operation in the global nuclear industry at this scale); or other issues could arise and change the projected schedule and estimated cost. Monthly construction production targets required to maintain the current project schedule will continue to increase significantly throughout 2019. To meet these increasing monthly targets, existing craft construction productivity must improve and additional craft laborers must be retained and deployed.

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Georgia Power and Southern Nuclear believe it is a leading practice in connection with a construction project of this size and complexity to periodically validate recent construction progress in comparison to the projected schedule and to verify and update quantities of commodities remaining to install, labor productivity, and forecasted staffing needs. This verification process, led by Southern Nuclear, was underway as of December 31, 2018 and is expected to be completed during the second quarter 2019. Georgia Power currently does not anticipate any material changes to the total estimated project capital cost forecast for Plant Vogtle Units 3 and 4 or the expected in-service dates of November 2021 and November 2022, respectively, resulting from this verification process. However, the ultimate impact on cost and schedule, if any, will not be known until the verification process is completed. Georgia Power is required to report the results and any project impacts to the Georgia PSC by May 15, 2019.
There have been technical and procedural challenges to the construction and licensing of Plant Vogtle Units 3 and 4 at the federal and state level and additional challenges may arise. Processes are in place that are designed to assure compliance with the requirements specified in the Westinghouse Design Control Document and the combined construction and operating licenses, including inspections by Southern Nuclear and the NRC that occur throughout construction. As a result of such compliance processes, certain license amendment requests have been filed and approved or are pending before the NRC. Various design and other licensing-based compliance matters, including the timely resolution of ITAAC and the related approvals by the NRC, may arise, which may result in additional license amendments or require other resolution. If any license amendment requests or other licensing-based compliance issues are not resolved in a timely manner, there may be delays in the project schedule that could result in increased costs.
The ultimate outcome of these matters cannot be determined at this time. However, any extension of the project schedule is currently estimated to result in additional base capital costs of approximately $50 million per month, based on Georgia Power's ownership interests, and AFUDC of approximately $12 million per month. While Georgia Power is not precluded from seeking recovery of any future capital cost forecast increase, management will ultimately determine whether or not to seek recovery. Any further changes to the capital cost forecast that are not expected to be recoverable through regulated rates will be required to be charged to income and such charges could be material.
Joint Owner Contracts
In November 2017, the Vogtle Owners entered into an amendment to their joint ownership agreements for Plant Vogtle Units 3 and 4 to provide for, among other conditions, additional Vogtle Owner approval requirements. Effective August 31, 2018, the Vogtle Owners further amended the joint ownership agreements to clarify and provide procedures for certain provisions of the joint ownership agreements related to adverse events that require the vote of the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 to continue construction (as amended, and together with the November 2017 amendment, the Vogtle Joint Ownership Agreements).
As a result of the increase in the total project capital cost forecast and Georgia Power's decision not to seek rate recovery of the increase in the base capital costs as described below, the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 were required to vote to continue construction. On September 26, 2018, the Vogtle Owners unanimously voted to continue construction of Plant Vogtle Units 3 and 4.
Amendments to the Vogtle Joint Ownership Agreements
In connection with the vote to continue construction, Georgia Power entered into (i) a binding term sheet (Vogtle Owner Term Sheet) with the other Vogtle Owners and MEAG's wholly-owned subsidiaries MEAG Power SPVJ, LLC (MEAG SPVJ), MEAG Power SPVM, LLC (MEAG SPVM), and MEAG Power SPVP, LLC (MEAG SPVP) to take certain actions which partially mitigate potential financial exposure for the other Vogtle Owners, including additional amendments to the Vogtle Joint Ownership Agreements and the purchase of PTCs from the other Vogtle Owners, and (ii) a term sheet (MEAG Term Sheet) with MEAG and MEAG SPVJ to provide funding with respect to MEAG SPVJ's ownership interest in Plant Vogtle Units 3 and 4 (Project J) under certain circumstances. On January 14, 2019, Georgia Power, MEAG, and MEAG SPVJ entered into an agreement to implement the provisions of the MEAG Term Sheet (MEAG Funding Agreement). On February 18, 2019, Georgia Power, the other Vogtle Owners, and MEAG's wholly-owned subsidiaries MEAG SPVJ, MEAG SPVM, and MEAG SPVP entered into certain amendments to the Vogtle Joint Ownership Agreements to implement the provisions of the Vogtle Owner Term Sheet (Global Amendments).
Pursuant to the Global Amendments, and consistent with the Vogtle Owner Term Sheet, the Vogtle Joint Ownership Agreements were modified as follows: (i) each Vogtle Owner must pay its proportionate share of qualifying construction costs for Plant Vogtle Units 3 and 4 based on its ownership percentage up to the estimated cost at completion (EAC) for Plant Vogtle Units 3 and 4 which formed the basis of Georgia Power's forecast of $8.4 billion in the nineteenth VCM plus $800 million; (ii) Georgia Power will be responsible for 55.7% of actual qualifying construction costs between $800 million and $1.6 billion over the EAC in the nineteenth VCM (resulting in $80 million of potential additional costs to Georgia Power), with the remaining Vogtle Owners responsible for 44.3% of such costs pro rata in accordance with their respective ownership interests; and (iii) Georgia

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Power will be responsible for 65.7% of qualifying construction costs between $1.6 billion and $2.1 billion over the EAC in the nineteenth VCM (resulting in a further $100 million of potential additional costs to Georgia Power), with the remaining Vogtle Owners responsible for 34.3% of such costs pro rata in accordance with their respective ownership interests.
If the EAC is revised and exceeds the EAC in the nineteenth VCM by more than $2.1 billion, each of the other Vogtle Owners will have a one-time option at the time the project budget forecast is so revised to tender a portion of its ownership interest to Georgia Power in exchange for Georgia Power's agreement to pay 100% of such Vogtle Owner's remaining share of total construction costs in excess of the EAC in the nineteenth VCM plus $2.1 billion. In this event, Georgia Power will have the option of cancelling the project in lieu of purchasing a portion of the ownership interest of any other Vogtle Owner. If Georgia Power accepts the offer to purchase a portion of another Vogtle Owner's ownership interest in Plant Vogtle Units 3 and 4, the ownership interest(s) to be conveyed from the tendering Vogtle Owner(s) to Georgia Power will be calculated based on the proportion of the cumulative amount of construction costs paid by each such tendering Vogtle Owner(s) and by Georgia Power as of the COD of Plant Vogtle Unit 4. For purposes of this calculation, payments made by Georgia Power on behalf of another Vogtle Owner in accordance with the second and third items described in the paragraph above will be treated as payments made by the applicable Vogtle Owner.
In the event the actual costs of construction at completion of a Unit are less than the EAC reflected in the nineteenth VCM report and such Unit is placed in service in accordance with the schedule projected in the nineteenth VCM report (i.e., Plant Vogtle Unit 3 is placed in service by November 2021 or Plant Vogtle Unit 4 is placed in service by November 2022), Georgia Power will be entitled to 60.7% of the cost savings with respect to the relevant Unit and the remaining Vogtle Owners will be entitled to 39.3% of such savings on a pro rata basis in accordance with their respective ownership interests.
For purposes of the foregoing provisions, qualifying construction costs will not include costs (i) resulting from force majeure events, including governmental actions or inactions (or significant delays associated with issuance of such actions) that affect the licensing, completion, start-up, operations, or financing of Plant Vogtle Units 3 and 4, administrative proceedings or litigation regarding ITAAC or other regulatory challenges to commencement of operation of Plant Vogtle Units 3 and 4, and changes in laws or regulations governing Plant Vogtle Units 3 and 4, (ii) legal fees and legal expenses incurred due to litigation with contractors or subcontractors that are not subsidiaries or affiliates of Southern Company, and (iii) additional costs caused by requests from the Vogtle Owners other than Georgia Power, except for the exercise of a right to vote granted under the Vogtle Joint Ownership Agreements, that increase costs by $100,000 or more.
Pursuant to the Global Amendments, and consistent with the Vogtle Owner Term Sheet, the provisions of the Vogtle Joint Ownership Agreements requiring that Vogtle Owners holding 90% of the ownership interests in Plant Vogtle Units 3 and 4 vote to continue construction following certain adverse events (Project Adverse Events) were modified. Pursuant to the Global Amendments, the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 must vote to continue construction if certain Project Adverse Events occur, including: (i) the bankruptcy of Toshiba; (ii) the termination or rejection in bankruptcy of certain agreements, including the Vogtle Services Agreement, the Bechtel Agreement, or the agency agreement with Southern Nuclear; (iii) Georgia Power publicly announces its intention not to submit for rate recovery any portion of its investment in Plant Vogtle Units 3 and 4 or the Georgia PSC determines that any of Georgia Power's costs relating to the construction of Plant Vogtle Units 3 and 4 will not be recovered in retail rates, excluding any additional amounts paid by Georgia Power on behalf of the other Vogtle Owners pursuant to the Global Amendments described above and the first 6% of costs during any six-month VCM reporting period that are disallowed by the Georgia PSC for recovery, or for which Georgia Power elects not to seek cost recovery, through retail rates; and (iv) an incremental extension of one year or more over the most recently approved schedule. Under the Global Amendments, Georgia Power may cancel the project at any time in its sole discretion.
In addition, pursuant to the Vogtle Joint Ownership Agreements, the required approval of holders of ownership interests in Plant Vogtle Units 3 and 4 is at least (i) 90% for a change of the primary construction contractor and (ii) 67% for material amendments to the Vogtle Services Agreement or agreements with Southern Nuclear or the primary construction contractor, including the Bechtel Agreement.
The Global Amendments provide that if the holders of at least 90% of the ownership interests fail to vote in favor of continuing the project following any future Project Adverse Event, work on Plant Vogtle Units 3 and 4 will continue for a period of 30 days if the holders of more than 50% of the ownership interests vote in favor of continuing construction (Majority Voting Owners). In such a case, the Vogtle Owners (i) have agreed to negotiate in good faith towards the resumption of the project, (ii) if no agreement is reached during such 30-day period, the project will be cancelled, and (iii) in the event of such a cancellation, the Majority Voting Owners will be obligated to reimburse any other Vogtle Owner for the incremental costs it incurred during such 30-day negotiation period.

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Purchase of PTCs During Commercial Operation
Pursuant to the Global Amendments, and consistent with the Vogtle Owner Term Sheet, Georgia Power has agreed to purchase additional PTCs from OPC, Dalton, MEAG SPVM, MEAG SPVP, and MEAG SPVJ (to the extent any MEAG SPVJ PTC rights remain after any purchases required under the MEAG Funding Agreement as described below) at varying purchase prices dependent upon the actual cost to complete construction of Plant Vogtle Units 3 and 4 as compared to the EAC reflected in the nineteenth VCM report. The purchases are at the option of the applicable Vogtle Owner.
Potential Funding to MEAG Project J
Pursuant to the MEAG Funding Agreement, and consistent with the MEAG Term Sheet, if MEAG SPVJ is unable to make its payments due under the Vogtle Joint Ownership Agreements solely as a result of the occurrence of one of the following situations that materially impedes access to capital markets for MEAG for Project J: (i) the conduct of JEA or the City of Jacksonville, such as JEA's legal challenges of its obligations under a PPA with MEAG (PPA-J), or (ii) PPA-J is declared void by a court of competent jurisdiction or rejected by JEA under the applicable provisions of the U.S. Bankruptcy Code (each of (i) and (ii), a JEA Default), at MEAG's request, Georgia Power will purchase from MEAG SPVJ the rights to PTCs attributable to MEAG SPVJ's share of Plant Vogtle Units 3 and 4 (approximately 206 MWs) within 30 days of such request at varying prices dependent upon the stage of construction of Plant Vogtle Units 3 and 4. The aggregate purchase price of the PTCs, together with any advances made as described in the next paragraph, shall not exceed $300 million.
At the option of MEAG, as an alternative or supplement to Georgia Power's purchase of PTCs as described above, Georgia Power has agreed to provide up to $250 million in funding to MEAG for Project J in the form of advances (either advances under the Vogtle Joint Ownership Agreements or the purchase of MEAG Project J bonds, at the discretion of Georgia Power), subject to any required approvals of the Georgia PSC and the DOE.
In the event MEAG SPVJ certifies to Georgia Power that it is unable to fund its obligations under the Vogtle Joint Ownership Agreements as a result of a JEA Default and Georgia Power becomes obligated to provide funding as described above, MEAG is required to (i) assign to Georgia Power its right to vote on any future Project Adverse Event and (ii) diligently pursue JEA for its breach of PPA-J. In addition, Georgia Power agreed that it will not sue MEAG for any amounts due from MEAG SPVJ under MEAG's guarantee of MEAG SPVJ's obligations so long as MEAG SPVJ complies with the terms of the MEAG Funding Agreement as to its payment obligations and the other non-payment provisions of the Vogtle Joint Ownership Agreements.
Under the terms of the MEAG Funding Agreement, Georgia Power may cancel the project in lieu of providing funding in the form of advances or PTC purchases.
Regulatory Matters
In December 2017, the Georgia PSC voted to approve (and issued its related order on January 11, 2018) Georgia Power's recommendation to continue construction and resolved the following regulatory matters related to Plant Vogtle Units 3 and 4: (i) none of the $3.3 billion of costs incurred through December 31, 2015 and reflected in the fourteenth VCM report should be disallowed from rate base on the basis of imprudence; (ii) the Contractor Settlement Agreement was reasonable and prudent and none of the amounts paid pursuant to the Contractor Settlement Agreement should be disallowed from rate base on the basis of imprudence; (iii) (a) capital costs incurred up to $5.68 billion would be presumed to be reasonable and prudent with the burden of proof on any party challenging such costs, (b) Georgia Power would have the burden to show that any capital costs above $5.68 billion were prudent, and (c) a revised capital cost forecast of $7.3 billion (after reflecting the impact of payments received under the Guarantee Settlement Agreement and related Customer Refunds) was found reasonable; (iv) construction of Plant Vogtle Units 3 and 4 should be completed, with Southern Nuclear serving as project manager and Bechtel as primary contractor; (v) approved and deemed reasonable Georgia Power's revised schedule placing Plant Vogtle Units 3 and 4 in service in November 2021 and November 2022, respectively; (vi) confirmed that the revised cost forecast does not represent a cost cap and that prudence decisions on cost recovery will be made at a later date, consistent with applicable Georgia law; (vii) reduced the ROE used to calculate the NCCR tariff (a) from 10.95% (the ROE rate setting point authorized by the Georgia PSC in the 2013 ARP) to 10.00% effective January 1, 2016, (b) from 10.00% to 8.30%, effective January 1, 2020, and (c) from 8.30% to 5.30%, effective January 1, 2021 (provided that the ROE in no case will be less than Georgia Power's average cost of long-term debt); (viii) reduced the ROE used for AFUDC equity for Plant Vogtle Units 3 and 4 from 10.00% to Georgia Power's average cost of long-term debt, effective January 1, 2018; and (ix) agreed that upon Unit 3 reaching commercial operation, retail base rates would be adjusted to include carrying costs on those capital costs deemed prudent in the Vogtle Cost Settlement Agreement. The January 11, 2018 order also stated that if Plant Vogtle Units 3 and 4 are not commercially operational by June 1, 2021 and June 1, 2022, respectively, the ROE used to calculate the NCCR tariff will be further reduced by 10 basis points each month (but not lower than Georgia Power's average cost of long-term debt) until the respective Unit is commercially operational. The ROE reductions negatively impacted earnings by approximately $100 million, $25 million, and $20 million in 2018, 2017, and 2016, respectively, and are estimated to have negative earnings impacts of approximately $75 million in 2019 and an aggregate of approximately $615 million from 2020 to 2022.

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In its January 11, 2018 order, the Georgia PSC also stated if other conditions change and assumptions upon which Georgia Power's seventeenth VCM report are based do not materialize, the Georgia PSC reserved the right to reconsider the decision to continue construction.
On February 12, 2018, Georgia Interfaith Power & Light, Inc. (GIPL) and Partnership for Southern Equity, Inc. (PSE) filed a petition appealing the Georgia PSC's January 11, 2018 order with the Fulton County Superior Court. On March 8, 2018, Georgia Watch filed a similar appeal to the Fulton County Superior Court for judicial review of the Georgia PSC's decision and denial of Georgia Watch's motion for reconsideration. On December 21, 2018, the Fulton County Superior Court granted Georgia Power's motion to dismiss the two appeals. On January 9, 2019, GIPL, PSE, and Georgia Watch filed an appeal of this decision with the Georgia Court of Appeals. Georgia Power believes the appeal has no merit; however, an adverse outcome in the appeal combined with subsequent adverse action by the Georgia PSC could have a material impact on Southern Company's and Georgia Power's results of operations, financial condition, and liquidity.
In preparation for its nineteenth VCM filing, Georgia Power requested Southern Nuclear to perform a full cost reforecast for the project. This reforecast, performed prior to the nineteenth VCM filing, resulted in a $0.7 billion increase to the base capital cost forecast reported in the second quarter 2018. This base cost increase primarily resulted from changed assumptions related to the finalization of contract scopes and management responsibilities for Bechtel and over 60 subcontractors, labor productivity rates, and craft labor incentives, as well as the related levels of project management, oversight, and support, including field supervision and engineering support.
Although Georgia Power believes these incremental costs are reasonable and necessary to complete the project and the Georgia PSC's order in the seventeenth VCM proceeding specifically states that the construction of Plant Vogtle Units 3 and 4 is not subject to a cost cap, Georgia Power did not seek rate recovery for these cost increases included in the current base capital cost forecast (or any related financing costs) in the nineteenth VCM report. In connection with future VCM filings, Georgia Power may request the Georgia PSC to evaluate costs currently included in the construction contingency estimate for rate recovery as and when they are appropriately included in the base capital cost forecast. After considering the significant level of uncertainty that exists regarding the future recoverability of costs included in the construction contingency estimate since the ultimate outcome of these matters is subject to the outcome of future assessments by management, as well as Georgia PSC decisions in these future regulatory proceedings, Georgia Power recorded a total pre-tax charge to income of $1.1 billion ($0.8 billion after tax) in the second quarter 2018, which includes the total increase in the base capital cost forecast and construction contingency estimate.
The ultimate outcome of these matters cannot be determined at this time.
See Note 2 to the financial statements under "Georgia Power – Nuclear Construction " in Item 8 herein for additional information regarding Plant Vogtle Units 3 and 4.
Southern Company Gas' significant investments in pipelines and pipeline development projects involve financial and execution risks.
Southern Company Gas has made significant investments in existing pipelines and pipeline development projects. Many of the existing pipelines are, and when completed many of the pipeline development projects will be, operated by third parties. If one of these agents fails to perform in a proper manner, the value of the investment could decline and Southern Company Gas could lose part or all of its investment. In addition, from time to time, Southern Company Gas may be required to contribute additional capital to a pipeline joint venture or guarantee the obligations of such joint venture.
With respect to certain pipeline development projects, Southern Company Gas will rely on its joint venture partners for construction management and will not exercise direct control over the process. All of the pipeline development projects are dependent on contractors for the successful and timely completion of the projects. Further, the development of pipeline projects involves numerous regulatory, environmental, construction, safety, political, and legal uncertainties and may require the expenditure of significant amounts of capital. These projects may not be completed on schedule, at the budgeted cost, or at all. There may be cost overruns and construction difficulties that cause Southern Company Gas' capital expenditures to exceed its initial expectations. Moreover, Southern Company Gas' income will not increase immediately upon the expenditure of funds on a pipeline project. Pipeline construction occurs over an extended period of time and Southern Company Gas will not receive material increases in income until the project is placed in service.
Work continues with state and federal agencies to obtain the required permits to begin construction on the PennEast Pipeline. Any material delays may impact forecasted capital expenditures and the expected in-service date.
The Atlantic Coast Pipeline has experienced challenges to its permits since construction began in 2018. During the third and fourth quarters 2018, a FERC stop work order, together with delays in obtaining permits necessary for construction and construction delays due to judicial actions, impacted the cost and schedule for the project. As a result, total project cost estimates have increased and the operator of the joint venture currently expects to achieve a late 2020 in-service date for at least

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key segments of the Atlantic Coast Pipeline, while the remainder may extend into early 2021. Abnormal weather, work delays (including due to judicial or regulatory action), and other conditions may result in additional cost or schedule modifications, which could result in an impairment of Southern Company Gas' investment and could have a material impact on Southern Company's and Southern Company Gas' financial statements.
The ultimate outcome of these matters cannot be determined at this time and the occurrence of these or any other of the foregoing events could adversely affect the results of operations, cash flows, and financial condition of Southern Company Gas and Southern Company.
FINANCIAL, ECONOMIC, AND MARKET RISKS
The electric generation and energy marketing operations of the traditional electric operating companies and Southern Power and the natural gas operations of Southern Company Gas are subject to risks, many of which are beyond their control, including changes in energy prices and fuel costs, which may reduce revenues and increase costs.
The generation, energy marketing, and natural gas operations of the Southern Company system are subject to changes in energy prices and fuel costs, which could increase the cost of producing power, decrease the amount received from the sale of energy, and/or make electric generating facilities less competitive. The market prices for these commodities may fluctuate significantly over relatively short periods of time. Among the factors that could influence energy prices and fuel costs are:
prevailing market prices for coal, natural gas, uranium, fuel oil, biomass, and other fuels, as applicable, used in the generation facilities of the traditional electric operating companies and Southern Power and, in the case of natural gas, distributed by Southern Company Gas, including associated transportation costs, and supplies of such commodities;
demand for energy and the extent of additional supplies of energy available from current or new competitors;
liquidity in the general wholesale electricity and natural gas markets;
weather conditions impacting demand for electricity and natural gas;
seasonality;
transmission or transportation constraints, disruptions, or inefficiencies;
availability of competitively priced alternative energy sources;
forced or unscheduled plant outages for the Southern Company system, its competitors, or third party providers;
the financial condition of market participants;
the economy in the Southern Company system's service territory, the nation, and worldwide, including the impact of economic conditions on demand for electricity and the demand for fuels, including natural gas;
natural disasters, wars, embargos, physical or cyber attacks, and other catastrophic events; and
federal, state, and foreign energy and environmental regulation and legislation.
These factors could increase the expenses and/or reduce the revenues of the registrants. For the traditional electric operating companies and Southern Company Gas' regulated gas distribution operations, such impacts may not be fully recoverable through rates.
Historically, the traditional electric operating companies and Southern Company Gas from time to time have experienced underrecovered fuel and/or purchased gas cost balances and may experience such balances in the future. While the traditional electric operating companies and Southern Company Gas are generally authorized to recover fuel and/or purchased gas costs through cost recovery clauses, recovery may be denied if costs are deemed to be imprudently incurred, and delays in the authorization of such recovery, both of which could negatively impact the cash flows of the affected traditional electric operating company or Southern Company Gas and of Southern Company.
The registrants are subject to risks associated with a changing economic environment, customer behaviors, including increased energy conservation, and adoption patterns of technologies by the customers of the Subsidiary Registrants.
The consumption and use of energy are fundamentally linked to economic activity. This relationship is affected over time by changes in the economy, customer behaviors, and technologies. Any economic downturn could negatively impact customer growth and usage per customer, thus reducing the sales of energy and revenues. Additionally, any economic downturn or disruption of financial markets, both nationally and internationally, could negatively affect the financial stability of customers and counterparties of the Subsidiary Registrants.
Outside of economic disruptions, changes in customer behaviors in response to energy efficiency programs, changing conditions and preferences, or changes in the adoption of technologies could affect the relationship of economic activity to the consumption of energy.
Both federal and state programs exist to influence how customers use energy, and several of the traditional electric operating companies and Southern Company Gas have PSC or other applicable state regulatory agency mandates to promote energy efficiency. Conservation programs could impact the financial results of the registrants in different ways. For example, if any traditional electric operating company or Southern Company Gas is required to invest in conservation measures that result in

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reduced sales from effective conservation, regulatory lag in adjusting rates for the impact of these measures could have a negative financial impact on such traditional electric operating company or Southern Company Gas and Southern Company. Customers could also voluntarily reduce their consumption of energy in response to decreases in their disposable income, increases in energy prices, or individual conservation efforts.
In addition, the adoption of technology by customers can have both positive and negative impacts on sales. Many new technologies utilize less energy than in the past. However, electric and natural gas technologies such as electric and natural gas vehicles can create additional demand. The Southern Company system uses best available methods and experience to incorporate the effects of changes in customer behavior, state and federal programs, PSC or other applicable state regulatory agency mandates, and technology, but the Southern Company system's planning processes may not appropriately estimate and incorporate these effects.
All of the factors discussed above could adversely affect a registrant's results of operations, financial condition, and liquidity.
The operating results of the registrants are affected by weather conditions and may fluctuate on a seasonal and   quarterly basis. In addition, catastrophic events, such as fires, earthquakes, hurricanes, tornadoes, floods, droughts, and storms, could result in substantial damage to or limit the operation of the properties of a Subsidiary Registrant and could negatively impact results of operation, financial condition, and liquidity.
Electric power and natural gas supply are generally seasonal businesses. In many parts of the country, demand for power peaks during the summer months, with market prices also peaking at that time. In other areas, power demand peaks during the winter months. While the electric power sales of some of the traditional electric operating companies peak in the summer, others peak in the winter. In the aggregate, electric power sales peak during the summer with a smaller peak during the winter. Additionally, Southern Power has variability in its revenues from renewable generation facilities due to seasonal weather patterns primarily from wind and sun. In most of the areas Southern Company Gas serves, natural gas demand peaks during the winter. As a result, the overall operating results of the registrants may fluctuate substantially on a seasonal basis. In addition, the Subsidiary Registrants have historically sold less power and natural gas when weather conditions are milder. Unusually mild weather in the future could reduce the revenues, net income, and available cash of the affected registrant.
Further, volatile or significant weather events could result in substantial damage to the transmission and distribution lines of the traditional electric operating companies, the generating facilities of the traditional electric operating companies and Southern Power, and the natural gas distribution and storage facilities of Southern Company Gas. The Subsidiary Registrants have significant investments in the Atlantic and Gulf Coast regions and Southern Power and Southern Company Gas have investments in various states which could be subject to severe weather and natural disasters, including wildfires. Further, severe drought conditions can reduce the availability of water and restrict or prevent the operation of certain generating facilities. There have been multiple significant hurricanes in the Southern Company system service territory in recent years.
In the event a traditional electric operating company or Southern Company Gas experiences any of these weather events or any natural disaster or other catastrophic event, recovery of costs in excess of reserves and insurance coverage is subject to the approval of its state PSC or other applicable state regulatory agency. Historically, the traditional electric operating companies from time to time have experienced deficits in their storm cost recovery reserve balances and may experience such deficits in the future. For example, at December 31, 2018, Georgia Power had a substantial underrecovered balance in its storm cost recovery balance as a result of multiple recent significant hurricanes in its service territory. Any denial by the applicable state PSC or other applicable state regulatory agency or delay in recovery of any portion of such costs could have a material negative impact on a traditional electric operating company's or Southern Company Gas' and on Southern Company's results of operations, financial condition, and liquidity.
In addition, damages resulting from significant weather events within the service territory of any traditional electric operating company or Southern Company Gas or affecting Southern Power's customers may result in the loss of customers and reduced demand for energy for extended periods and may impact customers' ability to perform under existing PPAs. See Note 1 to the financial statements under " Revenues Concentration of Revenue " in Item 8 herein for additional information on Pacific Gas & Electric Company's bankruptcy filing. Any significant loss of customers or reduction in demand for energy could have a material negative impact on a registrant's results of operations, financial condition, and liquidity.
Acquisitions, dispositions, or other strategic ventures or investments may not result in anticipated benefits and may present risks not originally contemplated, which may have a material adverse effect on the liquidity, results of operations, and financial condition of Southern Company and its subsidiaries.
Southern Company and its subsidiaries have made significant acquisitions and investments in the past, as well as recent dispositions, and may in the future make additional acquisitions, dispositions, or other strategic ventures or investments, including the pending disposition by Southern Power of Plant Mankato, which cannot be assured to be completed or beneficial to Southern Company or its subsidiaries. Southern Company and its subsidiaries continually seek opportunities to create value

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through various transactions, including acquisitions or sales of assets. Specifically, Southern Power continually seeks opportunities to execute its strategy to create value through various transactions, including acquisitions, dispositions, and sales of partnership interests, development and construction of new generating facilities, and entry into PPAs primarily with investor-owned utilities, IPPs, municipalities, and other load-serving entities, as well as commercial and industrial customers.
Southern Company and its subsidiaries may face significant competition for transactional opportunities and anticipated transactions may not be completed on acceptable terms or at all. In addition, these transactions are intended to, but may not, result in the generation of cash or income, the realization of savings, the creation of efficiencies, or the reduction of risk. These transactions may also affect the liquidity, results of operations, and financial condition of Southern Company and its subsidiaries.
These transactions also involve risks, including:
they may not result in an increase in income or provide adequate or expected funds or return on capital or other anticipated benefits;
they may result in Southern Company or its subsidiaries entering into new or additional lines of business, which may have new or different business or operational risks;
they may not be successfully integrated into the acquiring company's operations and/or internal control processes;
the due diligence conducted prior to a transaction may not uncover situations that could result in financial or legal exposure or may not appropriately evaluate the likelihood or quantify the exposure from identified risks;
they may result in decreased earnings, revenues, or cash flow;
Southern Company, Southern Company Gas, and certain of their subsidiaries have retained obligations in connection with transitional agreements related to dispositions that subject these companies to additional risk;
Southern Company or the applicable subsidiary may not be able to achieve the expected financial benefits from the use of funds generated by any dispositions;
expected benefits of a transaction may be dependent on the cooperation or performance of a counterparty; or
for the traditional electric operating companies and Southern Company Gas, costs associated with such investments that were expected to be recovered through regulated rates may not be recoverable.
Southern Company and Southern Company Gas are holding companies and Southern Power owns many of its assets indirectly through subsidiaries. Each of these companies is dependent on cash flows from their respective subsidiaries to meet their ongoing and future financial obligations, including making interest and principal payments on outstanding indebtedness and, for Southern Company, to pay dividends on its common stock.
Southern Company and Southern Company Gas are holding companies and, as such, they have no operations of their own. Substantially all of Southern Company's and Southern Company Gas' and many of Southern Power's respective consolidated assets are held by subsidiaries. A significant portion of Southern Company Gas' debt is issued by its 100%-owned subsidiary, Southern Company Gas Capital, and is fully and unconditionally guaranteed by Southern Company Gas. Southern Company's, Southern Company Gas' and, to a certain extent, Southern Power's ability to meet their respective financial obligations, including making interest and principal payments on outstanding indebtedness, and, for Southern Company, to pay dividends on its common stock, is dependent on the net income and cash flows of their respective subsidiaries and the ability of those subsidiaries to pay upstream dividends or to repay borrowed funds. Prior to funding Southern Company, Southern Company Gas, or Southern Power, the respective subsidiaries have financial obligations and, with respect to Southern Company and Southern Company Gas, regulatory restrictions that must be satisfied, including among others, debt service and preferred stock dividends. These subsidiaries are separate legal entities and, except as described below, have no obligation to provide Southern Company, Southern Company Gas, or Southern Power with funds. Certain of Southern Power's assets are held through controlling interests in subsidiaries. In certain cases, distributions without partner consent are limited to available cash, and the subsidiaries are obligated to distribute all available cash to their owners each quarter. In addition, Southern Company, Southern Company Gas, and Southern Power may provide capital contributions or debt financing to subsidiaries under certain circumstances, which would reduce the funds available to meet their respective financial obligations, including making interest and principal payments on outstanding indebtedness, and to pay dividends on Southern Company's common stock.
A downgrade in the credit ratings of any of the registrants, Southern Company Gas Capital, or Nicor Gas could negatively affect their ability to access capital at reasonable costs and/or could require posting of collateral or replacing certain indebtedness.
There are a number of factors that rating agencies evaluate to arrive at credit ratings for the registrants, Southern Company Gas Capital, and Nicor Gas, including capital structure, regulatory environment, the ability to cover liquidity requirements, and other commitments for capital. The registrants, Southern Company Gas Capital, and Nicor Gas could experience a downgrade in their ratings if any rating agency concludes that the level of business or financial risk of the industry or the applicable company has deteriorated. Changes in ratings methodologies by the agencies could also have a negative impact on credit ratings. If one or more rating agencies downgrade any registrant, Southern Company Gas Capital, or Nicor Gas, borrowing

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costs likely would increase, including automatic increases in interest rates under applicable term loans and credit facilities, the pool of investors and funding sources would likely decrease, and, particularly for any downgrade to below investment grade, significant collateral requirements may be triggered in a number of contracts. Any credit rating downgrades could require altering the mix of debt financing currently used, and could require the issuance of secured indebtedness and/or indebtedness with additional restrictive covenants binding the applicable company.
Uncertainty in demand for energy can result in lower earnings or higher costs. If demand for energy falls short of expectations, it could result in potentially stranded assets. If demand for energy exceeds expectations, it could result in increased costs for purchasing capacity in the open market or building additional electric generation and transmission facilities or natural gas distribution and storage facilities.
Southern Company, the traditional electric operating companies, and Southern Power each engage in a long-term planning process to estimate the optimal mix and timing of new generation assets required to serve future load obligations. Southern Company Gas engages in a long-term planning process to estimate the optimal mix and timing of building new pipelines and storage facilities, replacing existing pipelines, rewatering storage facilities, and entering new markets and/or expanding in existing markets. These planning processes must look many years into the future in order to accommodate the long lead times associated with the permitting and construction of new generation and associated transmission facilities and natural gas distribution and storage facilities. Inherent risk exists in predicting demand as future loads are dependent on many uncertain factors, including economic conditions, customer usage patterns, efficiency programs, and customer technology adoption. Because regulators may not permit the traditional electric operating companies or Southern Company Gas' regulated operating companies to adjust rates to recover the costs of new generation and associated transmission assets and/or new pipelines and related infrastructure in a timely manner or at all, Southern Company and its subsidiaries may not be able to fully recover these costs or may have exposure to regulatory lag associated with the time between the incurrence of costs and the recovery in customers' rates. In addition, under Southern Power's model of selling capacity and energy at negotiated market-based rates under long-term PPAs, Southern Power might not be able to fully execute its business plan if market prices drop below original forecasts. Southern Power and/or the traditional electric operating companies may not be able to extend existing PPAs or find new buyers for existing generation assets as existing PPAs expire, or they may be forced to market these assets at prices lower than originally intended. These situations could have negative impacts on net income and cash flows for the affected registrant.
The traditional electric operating companies are currently obligated to supply power to retail customers and wholesale customers under long-term PPAs. Southern Power is currently obligated to supply power to wholesale customers under long-term PPAs. At peak times, the demand for power required to meet this obligation could exceed the Southern Company system's available generation capacity. Market or competitive forces may require that the traditional electric operating companies purchase capacity on the open market or build additional generation and transmission facilities and that Southern Power purchase energy or capacity on the open market. Because regulators may not permit the traditional electric operating companies to pass all of these purchase or construction costs on to their customers, the traditional electric operating companies may not be able to recover some or all of these costs or may have exposure to regulatory lag associated with the time between the incurrence of costs of purchased or constructed capacity and the traditional electric operating companies' recovery in customers' rates. Under Southern Power's long-term fixed price PPAs, Southern Power may not be able to recover all of these costs. These situations could have negative impacts on net income and cash flows for the affected registrant.
The businesses of the registrants, SEGCO, and Nicor Gas are dependent on their ability to successfully access funds through capital markets and financial institutions. The inability of any of the registrants, SEGCO, or Nicor Gas to access funds may limit its ability to execute its business plan by impacting its ability to fund capital investments or acquisitions that it may otherwise rely on to achieve future earnings and cash flows.
The registrants, SEGCO, and Nicor Gas rely on access to both short-term money markets and longer-term capital markets as a significant source of liquidity for capital requirements not satisfied by the cash flow from their respective operations. If any of the registrants, SEGCO, or Nicor Gas is not able to access capital at competitive rates or on favorable terms, its ability to implement its business plan will be limited by impacting its ability to fund capital investments or acquisitions that it may otherwise rely on to achieve future earnings and cash flows. In addition, the registrants, SEGCO, and Nicor Gas rely on committed bank lending agreements as back-up liquidity which allows them to access low cost money markets. Each of the registrants, SEGCO, and Nicor Gas believes that it will maintain sufficient access to these financial markets based upon current credit ratings. However, certain events or market disruptions may increase the cost of borrowing or adversely affect the ability to raise capital through the issuance of securities or other borrowing arrangements or the ability to secure committed bank lending agreements used as back-up sources of capital. Such disruptions could include:
an economic downturn or uncertainty;
bankruptcy or financial distress at an unrelated energy company, financial institution, or sovereign entity;
capital markets volatility and disruption, either nationally or internationally;
changes in tax policy, including further interpretation and guidance on tax reform;

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volatility in market prices for electricity and natural gas;
actual or threatened cyber or physical attacks on the Southern Company system's facilities or unrelated energy companies' facilities;
war or threat of war; or
the overall health of the utility and financial institution industries.
Georgia Power's ability to make future borrowings through its term loan credit facility with the FFB is subject to the satisfaction of customary conditions, as well as certification of compliance with the requirements of the loan guarantee program under Title XVII of the Energy Policy Act of 2005, including accuracy of project-related representations and warranties, delivery of updated project-related information and evidence of compliance with the prevailing wage requirements of the Davis-Bacon Act of 1931, as amended, and certification from the DOE's consulting engineer that proceeds of the advances are used to reimburse certain costs of construction relating to Plant Vogtle Units 3 and 4 that are eligible for financing under the Title XVII Loan Guarantee Program. Prior to obtaining any further advances under Georgia Power's loan guarantee agreement with the DOE, Georgia Power is required to obtain the DOE's approval of the Bechtel Agreement.
Failure to comply with debt covenants or conditions could adversely affect the ability of the registrants, SEGCO, Southern Company Gas Capital, or Nicor Gas to execute future borrowings.
The debt and credit agreements of the registrants, SEGCO, Southern Company Gas Capital, and Nicor Gas contain various financial and other covenants. Georgia Power's loan guarantee agreement with the DOE contains additional covenants, events of default, and mandatory prepayment events relating to the construction of Plant Vogtle Units 3 and 4. Failure to meet those covenants beyond applicable grace periods could result in accelerated due dates and/or termination of the agreements, which would negatively affect the applicable company's financial condition and liquidity.
Volatility in the securities markets, interest rates, and other factors could substantially increase defined benefit pension and other postretirement plan costs and the funding available for nuclear decommissioning.
The costs of providing pension and other postretirement benefit plans are dependent on a number of factors, such as the rates of return on plan assets, discount rates, the level of interest rates used to measure the required minimum funding levels of the plan, changes in actuarial assumptions, government regulations, and/or life expectancy, and the frequency and amount of the Southern Company system's required or voluntary contributions made to the plans. Changes in actuarial assumptions and differences between the assumptions and actual values, as well as a significant decline in the value of investments that fund the pension and other postretirement plans, if not offset or mitigated by a decline in plan liabilities, could increase pension and other postretirement expense, and the Southern Company system could be required from time to time to fund the pension plans with significant amounts of cash. Such cash funding obligations could have a material impact on liquidity by reducing cash flows and could negatively affect results of operations. Additionally, Alabama Power and Georgia Power each hold significant assets in their nuclear decommissioning trusts to satisfy obligations to decommission Alabama Power's and Georgia Power's nuclear plants. The rate of return on assets held in those trusts can significantly impact both the funding available for decommissioning and the funding requirements for the trusts.
The registrants are subject to risks associated with their ability to obtain adequate insurance at acceptable costs.
The financial condition of some insurance companies, actual or threatened physical or cyber attacks, and natural disasters, among other things, could have disruptive effects on insurance markets. The availability of insurance covering risks that the registrants and their respective competitors typically insure against may decrease, and the insurance that the registrants are able to obtain may have higher deductibles, higher premiums, and more restrictive policy terms. Further, the insurance policies may not cover all of the potential exposures or the actual amount of loss incurred.
Any losses not covered by insurance, or any increases in the cost of applicable insurance, could adversely affect the results of operations, cash flows, or financial condition of the affected registrant.
The use of derivative contracts by Southern Company and its subsidiaries in the   normal course of business could result in financial losses that negatively impact the   net income of the registrants or in reported net income volatility.
Southern Company and its subsidiaries use derivative instruments, such as swaps, options, futures, and forwards, to manage their commodity and interest rate exposures and, to a lesser extent, manage foreign currency exchange rate exposure and engage in limited trading activities. The registrants could recognize financial losses as a result of volatility in the market values of these contracts or if a counterparty fails to perform. These risks are managed through risk management policies, limits, and procedures, which might not work as planned and cannot entirely eliminate the risks associated with these activities. In addition, derivative contracts entered into for hedging purposes might not offset the underlying exposure being hedged as expected, resulting in financial losses. In the absence of actively quoted market prices and pricing information from external sources, the valuation of these financial instruments can involve management's judgment or use of estimates. The factors used in the valuation of these instruments become more difficult to predict and the calculations become less reliable further into the

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future. As a result, changes in the underlying assumptions or use of alternative valuation methods could affect the reported fair value of these contracts.
In addition, Southern Company Gas utilizes derivative instruments to lock in economic value in wholesale gas services, which may not qualify as, or may not be designated as, hedges for accounting purposes. The difference in accounting treatment for the underlying position and the financial instrument used to hedge the value of the contract can cause volatility in reported net income of Southern Company and Southern Company Gas while the positions are open due to mark-to-market accounting.
Future impairments of goodwill or long-lived assets could have a material adverse effect on the registrants' results of operations.
Goodwill is assessed for impairment at least annually and more frequently if events or circumstances occur that would more likely than not reduce the fair value of a reporting unit below its carrying value and long-lived assets are assessed for impairment whenever events or circumstances indicate that an asset's carrying amount may not be recoverable. In connection with the completion of the Merger, the application of the acquisition method of accounting was pushed down to Southern Company Gas. The excess of the purchase price over the fair values of Southern Company Gas' assets and liabilities was recorded as goodwill. This resulted in a significant increase in the goodwill recorded on Southern Company's and Southern Company Gas' consolidated balance sheets. At December 31, 2018, goodwill was $5.3 billion and $5.0 billion for Southern Company and Southern Company Gas, respectively.
In addition, Southern Company and its subsidiaries have long-lived assets recorded on their balance sheets. To the extent the value of goodwill or long-lived assets become impaired, the affected registrant may be required to incur impairment charges that could have a material impact on their results of operations. For example, a wholly-owned subsidiary of Southern Company Gas owns and operates a natural gas storage facility consisting of two salt dome caverns where recent seismic mapping indicates that proximity of one of the caverns to the edge of the salt dome may be less than the required minimum and could result in Southern Company Gas retiring the cavern early. Early retirement of the cavern could trigger impairment of other long-lived assets associated with the natural gas storage facility. In addition, a subsidiary of Southern Company has several leveraged lease agreements, with terms ranging up to 45 years, which relate to international and domestic energy generation, distribution, and transportation assets. Southern Company receives federal income tax deductions for depreciation and amortization, as well as interest on long-term debt related to these investments. Southern Company reviews all important lease assumptions at least annually, or more frequently if events or changes in circumstances indicate that a change in assumptions has occurred or may occur. With respect to Southern Company's subsidiary's investments in leveraged leases, the recovery of its investment is dependent on the profitable operation of the leased assets by the respective lessees. A significant deterioration in the performance of the leased asset could result in the impairment of the related lease receivable.
Item 1B.
UNRESOLVED STAFF COMMENTS.
None.

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Item 2. PROPERTIES
Electric
Electric Properties
The traditional electric operating companies, Southern Power, and SEGCO, at January 1, 2019, owned and/or operated 33 hydroelectric generating stations, 26 fossil fuel generating stations, three nuclear generating stations, 13 combined cycle/cogeneration stations, 40 solar facilities, nine wind facilities, and one biomass facility. The amounts of capacity for each company, at January 1, 2019, are shown in the table below.
Generating Station
Location
Nameplate
Capacity (1)

 
 
 
(KWs)

 
FOSSIL STEAM
 
 
 
Gadsden
Gadsden, AL
120,000

 
Gorgas
Jasper, AL
1,021,250

(2
)
Barry
Mobile, AL
1,300,000

 
Greene County
Demopolis, AL
300,000

(3
)
Gaston Unit 5
Wilsonville, AL
880,000

 
Miller
Birmingham, AL
2,532,288

(4
)
Alabama Power Total
 
6,153,538

 
Bowen
Cartersville, GA
3,160,000

 
Hammond
Rome, GA
800,000

(5
)
McIntosh
Effingham County, GA
163,117

(5
)
Scherer
Macon, GA
750,924

(6
)
Wansley
Carrollton, GA
925,550

(7
)
Yates
Newnan, GA
700,000

 
Georgia Power Total
 
6,499,591

 
Daniel
Pascagoula, MS
500,000

(8
)
Greene County
Demopolis, AL
200,000

(3
)
Watson
Gulfport, MS
750,000

 
Mississippi Power Total
 
1,450,000

 
Gaston Units 1-4
Wilsonville, AL
 
 
SEGCO Total
 
1,000,000

(9
)
Total Fossil Steam
 
15,103,129

 
NUCLEAR STEAM
 
 
 
Farley
Dothan, AL
 
 
Alabama Power Total
 
1,720,000

 
Hatch
Baxley, GA
899,612

(10
)
Vogtle Units 1 and 2
Augusta, GA
1,060,240

(11
)
Georgia Power Total
 
1,959,852

 
Total Nuclear Steam
 
3,679,852

 

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Generating Station
Location
Nameplate
Capacity (1)

 
COMBUSTION TURBINES
 
 
 
Greene County
Demopolis, AL
 
 
Alabama Power Total
 
720,000

 
Boulevard
Savannah, GA
19,700

 
McDonough Unit 3
Atlanta, GA
78,800

 
McIntosh Units 1 through 8
Effingham County, GA
640,000

 
McManus
Brunswick, GA
481,700

 
Robins
Warner Robins, GA
158,400

 
Wansley
Carrollton, GA
26,322

(7
)
Wilson
Augusta, GA
354,100

 
Georgia Power Total
 
1,759,022

 
Chevron Cogenerating Station
Pascagoula, MS
147,292

(12
)
Sweatt
Meridian, MS
39,400

 
Watson
Gulfport, MS
39,360

 
Mississippi Power Total
 
226,052

 
Addison
Thomaston, GA
668,800

 
Cleveland County
Cleveland County, NC
720,000

 
Dahlberg
Jackson County, GA
756,000

 
Rowan
Salisbury, NC
455,250

 
Southern Power Total
 
2,600,050

 
Gaston (SEGCO)
Wilsonville, AL
19,680

(9
)
Total Combustion Turbines
 
5,324,804

 
COGENERATION
 
 
 
Washington County
Washington County, AL
123,428

 
Lowndes County
Burkeville, AL
104,800

 
Theodore
Theodore, AL
236,418

 
Alabama Power Total
 
464,646

 
COMBINED CYCLE
 
 
 
Barry
Mobile, AL
 
 
Alabama Power Total
 
1,070,424

 
McIntosh Units 10 and 11
Effingham County, GA
1,318,920

 
McDonough-Atkinson Units 4 through 6
Atlanta, GA
2,520,000

 
Georgia Power Total
 
3,838,920

 
Daniel
Pascagoula, MS
1,070,424

 
Ratcliffe
Kemper County, MS
769,898

(13)

Mississippi Power Total
 
1,840,322

 
Franklin
Smiths, AL
1,857,820

 
Harris
Autaugaville, AL
1,318,920

 
Mankato
Mankato, MN
375,000

(14)
Rowan
Salisbury, NC
530,550

 
Wansley Units 6 and 7
Carrollton, GA
1,073,000

 
Southern Power Total
 
5,155,290

 
Total Combined Cycle
 
11,904,956

 

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     Table of Contents                                  Index to Financial Statements

Generating Station
Location
Nameplate
Capacity (1)

 
HYDROELECTRIC FACILITIES
 
 
 
Bankhead
Holt, AL
53,985

 
Bouldin
Wetumpka, AL
225,000

 
Harris
Wedowee, AL
132,000

 
Henry
Ohatchee, AL
72,900

 
Holt
Holt, AL
46,944

 
Jordan
Wetumpka, AL
100,000

 
Lay
Clanton, AL
177,000

 
Lewis Smith
Jasper, AL
157,500

 
Logan Martin
Vincent, AL
135,000

 
Martin
Dadeville, AL
182,000

 
Mitchell
Verbena, AL
170,000

 
Thurlow
Tallassee, AL
81,000

 
Weiss
Leesburg, AL
87,750

 
Yates
Tallassee, AL
47,000

 
Alabama Power Total
 
1,668,079

 
Bartletts Ferry
Columbus, GA
173,000

 
Goat Rock
Columbus, GA
38,600

 
Lloyd Shoals
Jackson, GA
14,400

 
Morgan Falls
Atlanta, GA
16,800

 
North Highlands
Columbus, GA
29,600

 
Oliver Dam
Columbus, GA
60,000

 
Rocky Mountain
Rome, GA
215,256

(15
)
Sinclair Dam
Milledgeville, GA
45,000

 
Tallulah Falls
Clayton, GA
72,000

 
Terrora
Clayton, GA
16,000

 
Tugalo
Clayton, GA
45,000

 
Wallace Dam
Eatonton, GA
321,300

 
Yonah
Toccoa, GA
22,500

 
6 Other Plants
Various Georgia locations
18,080

 
Georgia Power Total
 
1,087,536

 
Total Hydroelectric Facilities
 
2,755,615

 

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Generating Station
Location
Nameplate
Capacity (1)

 
RENEWABLE SOURCES:
 
 
 
SOLAR FACILITIES
 
 
 
Fort Rucker
Calhoun County, AL
10,560

 
Anniston Army Depot
Dale County, AL
7,380

 
Alabama Power Total
 
17,940

 
Fort Benning
Columbus, GA
30,005

 
Fort Gordon
Augusta, GA
30,000

 
Fort Stewart
Fort Stewart, GA
30,000

 
Kings Bay
Camden County, GA
30,161

 
Dalton
Dalton, GA
6,508

 
Marine Corps Logistics Base
Albany, GA
31,161

 
4 Other Plants
Various Georgia locations
5,171

 
Georgia Power Total
 
163,006

 
Adobe
Kern County, CA
20,000

 
Apex
North Las Vegas, NV
20,000

 
Boulder I
Clark County, NV
100,000

 
Butler
Taylor County, GA
103,700

 
Butler Solar Farm
Taylor County, GA
22,000

 
Calipatria
Imperial County, CA
20,000

 
Campo Verde
Imperial County, CA
147,420

 
Cimarron
Springer, NM
30,640

 
Decatur County
Decatur County, GA
20,000

 
Decatur Parkway
Decatur County, GA
84,000

 
Desert Stateline
San Bernadino County, CA
299,900

 
East Pecos
Pecos County, TX
120,000

 
Garland
Kern County, CA
205,130

 
Gaskell West I
Kern County, CA
20,000

 
Granville
Oxford, NC
2,500

 
Henrietta
Kings County, CA
102,000

 
Imperial Valley
Imperial County, CA
163,200

 
Lamesa
Dawson County, TX
102,000

 
Lost Hills - Blackwell
Kern County, CA
33,440

 
Macho Springs
Luna County, NM
55,000

 
Morelos del Sol
Kern County, CA
15,000

 
North Star
Fresno County, CA
61,600

 
Pawpaw
Taylor County, GA
30,480

 
Roserock
Pecos County, TX
160,000

 
Rutherford
Rutherford County, NC
74,800

 
Sandhills
Taylor County, GA
146,890

 
Spectrum
Clark County, NV
30,240

 
Tranquillity
Fresno County, CA
205,300

 
Southern Power Total
 
2,395,240

(16
)
Total Solar
 
2,576,186

 

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Generating Station
Location
Nameplate
Capacity (1)

 
WIND FACILITIES
 
 
 
Bethel
Castro County, TX
276,000

 
Cactus Flats
Concho County, TX
148,350

 
Grant Plains
Grant County, OK
147,200

 
Grant Wind
Grant County, OK
151,800

 
Kay Wind
Kay County, OK
299,000

 
Passadumkeag
Penobscot County, ME
42,900

 
Salt Fork
Donley & Gray Counties TX
174,000

 
Tyler Bluff
Cooke County, TX
125,580

 
Wake Wind
Crosby & Floyd Counties, TX
257,250

 
Southern Power Total
 
1,622,080

(17)
BIOMASS FACILITY
 
 
 
Nacogdoches
Sacul, TX
 
 
Southern Power Total
 
115,500

 
 
 
 
 
Total Alabama Power Generating Capacity
 
11,814,627

 
Total Georgia Power Generating Capacity
 
15,307,927

 
Total Mississippi Power Generating Capacity
 
3,516,374

 
Total Southern Power Generating Capacity
 
11,888,160

 
Total Generating Capacity
 
43,546,768

 
Notes:
(1)
See "Jointly-Owned Facilities" herein and Note 5 to the financial statements under "Joint Ownership Agreements" in Item 8 herein for additional information.
(2)
As part of its environmental compliance strategy, Alabama Power plans to retire Plant Gorgas Units 8, 9, and 10 by April 15, 2019. See Note 2 to the financial statements under "Alabama Power – Environmental Accounting Order" in Item 8 herein for additional information.
(3)
Owned by Alabama Power and Mississippi Power as tenants in common in the proportions of 60% and 40%, respectively. Capacity shown for each company represents its portion of total plant capacity.
(4)
Capacity shown is Alabama Power's portion (95.92%) of total plant capacity.
(5)
Georgia Power has requested to decertify and retire Plant Hammond Units 1 through 4 and Plant McIntosh Unit 1 upon approval of its 2019 IRP filing. See Note 2 to the financial statements under "Georgia Power – Integrated Resource Plan" in Item 8 herein for additional information.
(6)
Capacity shown for Georgia Power is 8.4% of Units 1 and 2 and 75% of Unit 3.
(7)
Capacity shown is Georgia Power's portion (53.5%) of total plant capacity.
(8)
Capacity shown is Mississippi Power's portion (50%) of total plant capacity.
(9)
SEGCO is jointly-owned by Alabama Power and Georgia Power. See BUSINESS in Item 1 herein for additional information. Also see Note 7 to the financial statements under "SEGCO" in Item 8 herein.
(10)
Capacity shown is Georgia Power's portion (50.1%) of total plant capacity.
(11)
Capacity shown is Georgia Power's portion (45.7%) of total plant capacity.
(12)
Generation is dedicated to a single industrial customer. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FINANCIAL CONDITION AND LIQUIDITY – "Credit Rating Risk" of Mississippi Power in Item 7 herein.
(13)
The capacity shown is the gross capacity using natural gas fuel without supplemental firing.
(14)
On November 5, 2018, Southern Power entered into an agreement with Northern States Power to sell all of its equity interests in Plant Mankato (including the 385-MW expansion currently under construction). The ultimate outcome of this matter cannot be determined at this time. See Note 15 to the financial statements under "Southern Power – Sales of Natural Gas Plants" in Item 8 herein for additional information.
(15)
Capacity shown is Georgia Power's portion (25.4%) of total plant capacity. OPC operates the plant.
(16)
In May 2018, Southern Power sold a noncontrolling 33% equity interest in SP Solar (a limited partnership indirectly owning all of Southern Power's solar facilities, except the Roserock and Gaskell West facilities). SP Solar is the 51% majority owner of Boulder 1, Garland, Henrietta, Imperial Valley, Lost Hills Blackwell, North Star, and Tranquillity; the 66% majority owner of Desert Stateline; and the sole owner of the remaining SP Solar facilities. Southern Power is the 51% majority owner of Roserock and also the controlling partner in a tax equity partnership owning Gaskell West. All of these entities are consolidated subsidiaries of Southern Power and the capacity shown in the table is 100% of the nameplate capacity for the respective facility.
(17)
In December 2018, Southern Power sold a noncontrolling tax equity interest in SP Wind (which owns all of Southern Power's wind facilities, except Cactus Flats). SP Wind is the 90.1% majority owner of Wake Wind and owns 100% of the remaining SP Wind facilities. Southern Power is the controlling partner in a tax equity partnership owning Cactus Flats. All of these entities are consolidated subsidiaries of Southern Power and the capacity shown in the table is 100% of the nameplate capacity for the respective facility.

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Except as discussed below under "Titles to Property," the principal plants and other important units of the traditional electric operating companies, Southern Power, and SEGCO are owned in fee by the respective companies. It is the opinion of management of each such company that its operating properties are adequately maintained and are substantially in good operating condition, and suitable for their intended purpose.
Mississippi Power owns a 79-mile length of 500-kilovolt transmission line which is leased to Entergy Gulf States Louisiana, LLC. The line extends from Plant Daniel to the Louisiana state line. Entergy Gulf States Louisiana, LLC is paying a use fee over a 40-year period through 2024 covering all expenses and the amortization of the original cost. At December 31, 2018 , the unamortized portion was approximately $12 million.
Mississippi Power owns a lignite mine and equipment that were intended to provide fuel for the Kemper IGCC. Mississippi Power also has acquired mineral reserves located around the Kemper County energy facility. Liberty Fuels Company, LLC, the operator of the mine, has a legal obligation to perform mine reclamation and Mississippi Power has a contractual obligation to fund all reclamation activities. As a result of the abandonment of the Kemper IGCC, final mine reclamation began in 2018 and is expected to be substantially completed in 2020, with monitoring expected to continue through 2027. Mississippi Power is currently evaluating its options regarding the final disposition of the CO 2 pipeline, including removal of the pipeline. This evaluation is expected to be complete later in 2019. The ultimate outcome of these matters cannot be determined at this time. See Note 2 to the financial statements under " Mississippi Power – Kemper County Energy Facility – Lignite Mine and CO 2 Pipeline Facilities " in Item 8 herein for additional information on the lignite mine and CO 2 pipeline.
In August 2018, Mississippi Power filed a RMP which identified alternatives that, if implemented, could impact Mississippi Power's generating stations as well as Plant Greene County, jointly owned by Mississippi Power and Alabama Power. See BUSINESS in Item 1 herein under "Rate Matters – Integrated Resource Planning – Mississippi Power" for additional information.
In conjunction with Southern Company's sale of Gulf Power, Mississippi Power and Gulf Power have committed to seek a restructuring of their 50% undivided ownership interests in Plant Daniel such that each of them would, after the restructuring, own 100% of a generating unit. On January 15, 2019, Gulf Power provided notice to Mississippi Power that Gulf Power will retire its share of the generating capacity of Plant Daniel on January 15, 2024. Mississippi Power has the option to purchase Gulf Power's ownership interest for $1 on January 15, 2024, provided that Mississippi Power exercises the option no later than 120 days prior to that date. Mississippi Power is assessing the potential operational and economic effects of Gulf Power's notice. The ultimate outcome of these matters remains subject to completion of Mississippi Power's evaluations and applicable regulatory approvals, including the FERC and the Mississippi PSC, and cannot now be determined. See Note 15 to the financial statements under " Southern Company's Sale of Gulf Power " in Item 8 herein for information regarding the sale of Gulf Power.
In 2018 , the maximum demand on the traditional electric operating companies, Southern Power Company, and SEGCO was 36,429,000 KWs and occurred on January 18, 2018 . The all-time maximum demand of 38,777,000 KWs on the traditional electric operating companies, Southern Power Company, and SEGCO occurred on August 22, 2007. These amounts exclude demand served by capacity retained by MEAG Power, OPC, and SEPA. The reserve margin for the traditional electric operating companies, Southern Power Company, and SEGCO in 2018 was 29.8 %. See SELECTED FINANCIAL DATA in Item 6 herein for additional information.
Jointly-Owned Facilities
Alabama Power, Georgia Power, and Mississippi Power at January 1, 2019 had undivided interests in certain generating plants and other related facilities with non-affiliated parties. The percentages of ownership of the total plant or facility are as follows:
 
 
 
 
Percentage Ownership
 
 
 
 
Total
Capacity
 
Alabama
Power
 
Power
South
 
Georgia
Power
 
Mississippi
Power
 
OPC
 
MEAG
Power
 
Dalton
 
Gulf
Power
 
 
(MWs)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Plant Miller Units 1 and 2
 
1,320

 
91.8
%
 
8.2
%
 
%
 
%
 
%
 
%
 
%
 
%
Plant Hatch
 
1,796

 

 

 
50.1

 

 
30.0

 
17.7

 
2.2

 

Plant Vogtle Units 1 and 2
 
2,320

 

 

 
45.7

 

 
30.0

 
22.7

 
1.6

 

Plant Scherer Units 1 and 2
 
1,636

 

 

 
8.4

 

 
60.0

 
30.2

 
1.4

 

Plant Scherer Unit 3
 
818

 

 

 
75.0

 

 

 

 

 
25.0

Plant Wansley
 
1,779

 

 

 
53.5

 

 
30.0

 
15.1

 
1.4

 

Rocky Mountain
 
903

 

 

 
25.4

 

 
74.6

 

 

 

Plant Daniel Units 1 and 2
 
1,000

 

 

 

 
50.0

 

 

 

 
50.0


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Alabama Power, Georgia Power, and Mississippi Power have contracted to operate and maintain the respective units in which each has an interest (other than Rocky Mountain) as agent for the joint owners. Southern Nuclear operates and provides services to Alabama Power's and Georgia Power's nuclear plants.
In addition, Georgia Power has commitments regarding a portion of a 5% interest in Plant Vogtle Units 1 and 2 owned by MEAG Power that are in effect until the later of retirement of the plant or the latest stated maturity date of MEAG Power's bonds issued to finance such ownership interest. The payments for capacity are required whether any capacity is available. The energy cost is a function of each unit's variable operating costs. Except for the portion of the capacity payments related to the Georgia PSC's disallowances of Plant Vogtle Units 1 and 2 costs, the cost of such capacity and energy is included in purchased power from non-affiliates in Georgia Power's statements of income in Item 8 herein. Also see Note 9 to the financial statements under " Fuel and Power Purchase Agreements " in Item 8 herein for additional information.
Construction continues on Plant Vogtle Units 3 and 4, which are jointly owned by the Vogtle Owners (with each owner holding the same undivided ownership interest as shown in the table above with respect to Plant Vogtle Units 1 and 2). See Note 2 to the financial statements under " Georgia Power Nuclear Construction " in Item 8 herein.
On December 4, 2018, Southern Power completed the sale of its 65% ownership interest in Plant Stanton Unit A, which Southern Power previously jointly-owned with OUC, FMPA, and KUA, to NextEra Energy. See Note 15 to the financial statements under " Southern Power Sales of Natural Gas Plants " in Item 8 herein for additional information.
Titles to Property
The traditional electric operating companies', Southern Power's, and SEGCO's interests in the principal plants and other important units of the respective companies are owned in fee by such companies, subject to the following major encumbrances: (1) liens pursuant to the assumption of debt obligations by Mississippi Power in connection with the acquisition of Plant Daniel Units 3 and 4, (2) a leasehold interest granted by Mississippi Power's largest retail customer, Chevron Products Company (Chevron), at the Chevron refinery, on which five combustion turbines of Mississippi Power are located, (3) liens pursuant to the agreements entered into with Chevron in October 2017 on Mississippi Power's co-generation assets located at the Chevron refinery, (4) liens associated with Georgia Power's reimbursement obligations to the DOE under its loan guarantee, which are secured by a first priority lien on (a) Georgia Power's 45.7% undivided ownership interest in Plant Vogtle Units 3 and 4 and (b) Georgia Power's rights and obligations under the principal contracts relating to Plant Vogtle Units 3 and 4, and (5) liens associated with two PPAs assumed as part of the acquisition of Plant Mankato in 2016 by Southern Power Company. See Note  5 to the financial statements under " Assets Subject to Lien ," Note 8 to the financial statements under " Secured Debt " and " Long-term Debt DOE Loan Guarantee Borrowings ," and Note 15 to the financial statements under " Southern Power Sales of Natural Gas Plants " in Item 8 herein for additional information. The traditional electric operating companies own the fee interests in certain of their principal plants as tenants in common. See "Jointly-Owned Facilities" herein and Note 5 to the financial statements under " Joint Ownership Agreements " in Item 8 herein for additional information. Properties such as electric transmission and distribution lines, steam heating mains, and gas pipelines are constructed principally on rights-of-way, which are maintained under franchise or are held by easement only. A substantial portion of lands submerged by reservoirs is held under flood right easements. In addition, certain of the renewable generating facilities occupy or use real property that is not owned, primarily through various leases, easements, rights-of-way, permits, or licenses from private landowners or governmental entities.
Natural Gas
Southern Company Gas considers its properties to be adequately maintained, substantially in good operating condition, and suitable for their intended purpose. The following provides the location and general character of the materially important properties that are used by the segments of Southern Company Gas. Substantially all of Nicor Gas' properties are subject to the lien of the indenture securing its first mortgage bonds. See Note 8 to the financial statements under " Long-term Debt Other Long-Term Debt Southern Company Gas " in Item 8 herein for additional information.
Distribution and Transmission Mains – Southern Company Gas' distribution systems transport natural gas from its pipeline suppliers to customers in its service areas. These systems consist primarily of distribution and transmission mains, compressor stations, peak shaving/storage plants, service lines, meters, and regulators. At December 31, 2018 , Southern Company Gas' gas distribution operations segment owned approximately 75,200 miles of underground distribution and transmission mains, which are located on easements or rights-of-way that generally provide for perpetual use.
Storage Assets – Gas Distribution Operations – Southern Company Gas owns and operates eight underground natural gas storage fields in Illinois with a total working capacity of approximately 150 Bcf, approximately 135 Bcf of which is usually cycled on an annual basis. This system is designed to meet about 50% of the estimated peak-day deliveries and approximately 40% of the normal winter deliveries in Illinois. This level of storage capability provides Nicor Gas with supply flexibility, improves the reliability of deliveries, and helps mitigate the risk associated with seasonal price movements.

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Southern Company Gas also has four LNG plants located in Georgia and Tennessee with total LNG storage capacity of approximately 7.4 Bcf. In addition, Southern Company Gas owns two propane storage facilities in Virginia, each with storage capacity of approximately 0.3 Bcf. The LNG plants and propane storage facility are used by Southern Company Gas' gas distribution operations segment to supplement natural gas supply during peak usage periods.
Storage Assets – All Other – Southern Company Gas subsidiaries own three high-deliverability natural gas storage and hub facilities that are included in the all other segment. Jefferson Island Storage & Hub, LLC operates a storage facility in Louisiana consisting of two salt dome gas storage caverns. Golden Triangle Storage, Inc. operates a storage facility in Texas consisting of two salt dome caverns. Central Valley Gas Storage, LLC operates a depleted field storage facility in California. In addition, Southern Company Gas has a LNG facility in Alabama that produces LNG for Pivotal LNG, Inc. to support its business of selling LNG as a substitute fuel in various markets.
In August 2017, in connection with an ongoing integrity project into the salt dome gas storage caverns in Louisiana, updated seismic mapping indicated the proximity of one of the caverns to the edge of the salt dome may be less than the required minimum and could result in Southern Company Gas retiring the cavern e arly. See FUTURE EARNINGS POTENTIAL – "Other Matters" of Southern Company Gas in Item 7 herein and Note 3 to the financial statements under " Other Matters Southern Company Gas " in Item 8 herein for additional information.
Jointly-Owned Properties – Southern Company Gas' gas pipeline investments segment has a 50% undivided ownership interest in a 115 -mile pipeline facility in northwest Georgia that was placed in service in August 2017 . Southern Company Gas also has an agreement to lease its 50% undivided ownership in the pipeline facility. See Note 5 to the financial statements under " Joint Ownership Agreements " in Item 8 herein for additional information.
Southern Company Gas owns a 50% interest in a LNG liquefaction and storage facility in Jacksonville, Florida, which was placed in service in October 2018 and is included in the all other segment. The facility is outfitted with a 2.0 million gallon storage tank with the capacity to produce in excess of 120,000 gallons of LNG per day.

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     Table of Contents                                  Index to Financial Statements

Item 3.
LEGAL PROCEEDINGS
See Note  3 to the financial statements in Item 8 herein for descriptions of legal and administrative proceedings discussed therein.
Item 4.
MINE SAFETY DISCLOSURES
Not applicable.

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     Table of Contents                                  Index to Financial Statements

EXECUTIVE OFFICERS OF SOUTHERN COMPANY
(Identification of executive officers of Southern Company is inserted in Part I in accordance with Regulation S-K, Item 401(b), Instruction 3.) The ages of the officers set forth below are as of December 31, 2018 .
Thomas A. Fanning
Chairman, President, and Chief Executive Officer
Age 61
First elected in 2003. Chairman and Chief Executive Officer since December 2010 and President since August 2010.
Andrew W. Evans
Executive Vice President and Chief Financial Officer
Age 52
First elected in 2016. Executive Vice President since July 2016 and Chief Financial Officer since June 2018. Previously served as Chief Executive Officer and Chairman of Southern Company Gas' Board of Directors from January 2016 through June 2018, President of Southern Company Gas from May 2015 through June 2018, Chief Operating Officer of Southern Company Gas from May 2015 through December 2015, and Executive Vice President and Chief Financial Officer of Southern Company Gas from May 2006 through May 2015.
W. Paul Bowers
Chairman, President and Chief Executive Officer of Georgia Power
Age 62
First elected in 2001. Chief Executive Officer, President, and Director of Georgia Power since January 2011. Chairman of Georgia Power's Board of Directors since May 2014.
S. W. Connally, Jr.
Executive Vice President of SCS
Age 49
First elected in 2012. Executive Vice President for Operations of SCS since June 2018. Previously served as President, Chief Executive Officer, and Director of Gulf Power from July 2012 through December 2018 and Chairman of Gulf Power's Board of Directors from July 2015 through December 2018.
Mark A. Crosswhite
Chairman, President and Chief Executive Officer of Alabama Power
Age 56
First elected in 2010. President, Chief Executive Officer, and Director of Alabama Power since March 2014. Chairman of Alabama Power's Board of Directors since May 2014. Previously served as Executive Vice President and Chief Operating Officer of Southern Company from July 2012 through February 2014.
Kimberly S. Greene
Chairman, President, and Chief Executive Officer of Southern Company Gas
Age 52
First elected in 2013. Chairman, President, and Chief Executive Officer of Southern Company Gas since June 2018. Director of Southern Company Gas since July 2016. Previously served as Executive Vice President and Chief Operating Officer of Southern Company from March 2014 through June 2018 and President and Chief Executive Officer of SCS from April 2013 through February 2014.
James Y. Kerr II
Executive Vice President, Chief Legal Officer, and Chief Compliance Officer
Age 54
First elected in 2014. Executive Vice President, Chief Legal Officer (formerly known as General Counsel), and Chief Compliance Officer since March 2014. Before joining Southern Company, Mr. Kerr was a partner with McGuireWoods LLP and a senior advisor at McGuireWoods Consulting LLC from 2008 through February 2014.
Stephen E. Kuczynski
Chairman, President, and Chief Executive Officer of Southern Nuclear
Age 56
First elected in 2011. Chairman, President, and Chief Executive Officer of Southern Nuclear since July 2011.

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     Table of Contents                                  Index to Financial Statements

Mark S. Lantrip
Executive Vice President
Age 64
First elected in 2014. Executive Vice President since February 2019. Chairman, President, and Chief Executive Officer of SCS since March 2014 and Chairman, President, and Chief Executive Officer of Southern Power since March 2018. Previously served as Treasurer of Southern Company from October 2007 to February 2014 and Executive Vice President of SCS from November 2010 to March 2014.
Anthony L. Wilson
Chairman, President, and Chief Executive Officer of Mississippi Power
Age 54
First elected in 2015. President of Mississippi Power since October 2015 and Chief Executive Officer and Director since January 2016. Chairman of Mississippi Power's Board of Directors since August 2016. Previously served as Executive Vice President of Mississippi Power from May 2015 to October 2015 and Executive Vice President of Georgia Power from January 2012 to May 2015.
Christopher C. Womack
Executive Vice President
Age 60
First elected in 2008. Executive Vice President and President of External Affairs since January 2009.
The officers of Southern Company were elected at the first meeting of the directors following the last annual meeting of stockholders held on May 23, 2018 , for a term of one year or until their successors are elected and have qualified, except for Mr. Lantrip, whose election as Executive Vice President was effective February 11, 2019.


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EXECUTIVE OFFICERS OF ALABAMA POWER
(Identification of executive officers of Alabama Power is inserted in Part I in accordance with Regulation S-K, Item 401(b), Instruction 3.) The ages of the officers set forth below are as of December 31, 2018 .
Mark A. Crosswhite
Chairman, President, and Chief Executive Officer
Age 56
First elected in 2014. President, Chief Executive Officer, and Director since March 1, 2014. Chairman since May 2014. Previously served as Executive Vice President and Chief Operating Officer of Southern Company from July 2012 through February 2014.
Greg J. Barker
Executive Vice President
Age 55
First elected in 2016. Executive Vice President for Customer Services since February 2016. Previously served as Senior Vice President of Marketing and Economic Development from April 2012 to February 2016.
Philip C. Raymond
Executive Vice President, Chief Financial Officer, and Treasurer
Age 59
First elected in 2010. Executive Vice President, Chief Financial Officer, and Treasurer since August 2010.
Zeke W. Smith
Executive Vice President
Age 59
First elected in 2010. Executive Vice President of External Affairs since November 2010.
James P. Heilbron
Senior Vice President and Senior Production Officer
Age 47
First elected in 2013. Senior Vice President and Senior Production Officer of Alabama Power since March 2013 and Senior Vice President and Senior Production Officer – West of SCS and Senior Production Officer of Mississippi Power since October 2018.
R. Scott Moore
Senior Vice President
Age 51
First elected in 2017. Senior Vice President of Power Delivery since May 2017. Previously served as Vice President of Transmission from August 2012 to May 2017.
The officers of Alabama Power were elected at the meeting of the directors held on April 27, 2018 for a term of one year or until their successors are elected and have qualified.

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PART II

Item 5.
MARKET FOR REGISTRANTS' COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES
(a)(1) The common stock of Southern Company is listed and traded on the NYSE under the ticker symbol SO. The common stock is also traded on regional exchanges across the U.S.
There is no market for the other registrants' common stock, all of which is owned by Southern Company.
(a)(2) Number of Southern Company's common stockholders of record at January 31, 2019 : 115,847
Each of the other registrants have one common stockholder, Southern Company.
(a)(3) Securities authorized for issuance under equity compensation plans.
See Part III, Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.
(b) Use of Proceeds
Not applicable.
(c) Issuer Purchases of Equity Securities
None.

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     Table of Contents                                  Index to Financial Statements

Item 6.
SELECTED FINANCIAL DATA
 
Page

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     Table of Contents                                  Index to Financial Statements

SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2014 - 2018
Southern Company and Subsidiary Companies 2018 Annual Report
 
2018

 
2017

 
2016 (d)

 
2015

 
2014

Operating Revenues (in millions)
$
23,495

 
$
23,031

 
$
19,896

 
$
17,489

 
$
18,467

Total Assets (in millions) (a)
$
116,914

 
$
111,005

 
$
109,697

 
$
78,318

 
$
70,233

Gross Property Additions (in millions)
$
8,205

 
$
5,984

 
$
7,624

 
$
6,169

 
$
6,522

Return on Average Common Equity (percent) (b)
9.11

 
3.44

 
10.80

 
11.68

 
10.08

Cash Dividends Paid Per Share of
 Common Stock
$
2.3800

 
$
2.3000

 
$
2.2225

 
$
2.1525

 
$
2.0825

Consolidated Net Income Attributable to
   Southern Company (in millions) (b)
$
2,226

 
$
842

 
$
2,448

 
$
2,367

 
$
1,963

Earnings Per Share —
 
 
 
 
 
 
 
 
 
Basic
$
2.18

 
$
0.84

 
$
2.57

 
$
2.60

 
$
2.19

Diluted
2.17

 
0.84

 
2.55

 
2.59

 
2.18

Capitalization (in millions):
 
 
 
 
 
 
 
 
 
Common stockholders' equity
$
24,723

 
$
24,167

 
$
24,758

 
$
20,592

 
$
19,949

Preferred and preference stock of subsidiaries and
   noncontrolling interests
4,316

 
1,361

 
1,854

 
1,390

 
977

Redeemable preferred stock of subsidiaries
291

 
324

 
118

 
118

 
375

Redeemable noncontrolling interests

 

 
164

 
43

 
39

Long-term debt (a)(c)
40,736

 
44,462

 
42,629

 
24,688

 
20,644

Total (excluding amounts due within one year) (c)
$
70,066

 
$
70,314

 
$
69,523

 
$
46,831

 
$
41,984

Capitalization Ratios (percent):
 
 
 
 
 
 
 
 
 
Common stockholders' equity
35.3

 
34.4

 
35.6

 
44.0

 
47.5

Preferred and preference stock of subsidiaries and
   noncontrolling interests
6.2

 
1.9

 
2.7

 
3.0

 
2.3

Redeemable preferred stock of subsidiaries
0.4

 
0.5

 
0.2

 
0.3

 
0.9

Redeemable noncontrolling interests

 

 
0.2

 
0.1

 
0.1

Long-term debt (a)(c)
58.1

 
63.2

 
61.3

 
52.6

 
49.2

Total (excluding amounts due within one year) (c)
100.0

 
100.0

 
100.0

 
100.0

 
100.0

Other Common Stock Data:
 
 
 
 
 
 
 
 
 
Book value per share
$
23.91

 
$
23.99

 
$
25.00

 
$
22.59

 
$
21.98

Market price per share:
 
 
 
 
 
 
 
 
 
High
$
49.43

 
$
53.51

 
$
54.64

 
$
53.16

 
$
51.28

Low
42.38

 
46.71

 
46.00

 
41.40

 
40.27

Close (year-end)
43.92

 
48.09

 
49.19

 
46.79

 
49.11

Market-to-book ratio (year-end) (percent)
183.7

 
200.5

 
196.8

 
207.2

 
223.4

Price-earnings ratio (year-end) (times)
20.1

 
57.3

 
19.1

 
18.0

 
22.4

Dividends paid (in millions)
$
2,425

 
$
2,300

 
$
2,104

 
$
1,959

 
$
1,866

Dividend yield (year-end) (percent)
5.4

 
4.8

 
4.5

 
4.6

 
4.2

Dividend payout ratio (percent)
108.9

 
273.2

 
86.0

 
82.7

 
95.0

Shares outstanding (in thousands):
 
 
 
 
 
 
 
 
 
Average
1,020,247

 
1,000,336

 
951,332

 
910,024

 
897,194

Year-end
1,033,788

 
1,007,603

 
990,394

 
911,721

 
907,777

Stockholders of record (year-end)
116,135

 
120,803

 
126,338

 
131,771

 
137,369

(a)
A reclassification of debt issuance costs from Total Assets to Long-term debt of $202 million and a reclassification of deferred tax assets from Total Assets to Accumulated deferred income taxes of $488 million is reflected for 2014, in accordance with new accounting standards adopted in 2015 and applied retrospectively.
(b)
Georgia Power recorded a pre-tax estimated probable loss of $1.1 billion ($0.8 billion after tax) in the second quarter 2018 to reflect its revised estimate to complete construction and start-up of Plant Vogtle Units 3 and 4. In addition, a significant loss to income was recorded by Mississippi Power related to the suspension of the Kemper IGCC in June 2017. Earnings in all periods presented were impacted by losses related to the Kemper IGCC. See Note 2 to the financial statements in Item 8 herein for additional information.
(c)
Amounts related to Gulf Power have been reclassified to liabilities held for sale at December 31, 2018. See Note 15 to the financial statements under "Southern Company's Sale of Gulf Power" in Item 8 herein for additional information.
(d)
The 2016 selected financial and operating data includes the operations of Southern Company Gas from the date of the Merger, July 1, 2016, through December 31, 2016. See Note 15 to the financial statements under "Southern Company Merger with Southern Company Gas" in Item 8 herein for additional information.

II-3

     Table of Contents                                  Index to Financial Statements

SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2014 - 2018 (continued)
Southern Company and Subsidiary Companies 2018 Annual Report
 
2018

 
2017

 
2016 (a)

 
2015

 
2014

Operating Revenues (in millions):
 
 
 
 
 
 
 
 
 
Residential
$
6,608

 
$
6,515

 
$
6,614

 
$
6,383

 
$
6,499

Commercial
5,266

 
5,439

 
5,394

 
5,317

 
5,469

Industrial
3,224

 
3,262

 
3,171

 
3,172

 
3,449

Other
124

 
114

 
55

 
115

 
133

Total retail
15,222

 
15,330

 
15,234

 
14,987

 
15,550

Wholesale
2,516

 
2,426

 
1,926

 
1,798

 
2,184

Total revenues from sales of electricity
17,738

 
17,756

 
17,160

 
16,785

 
17,734

Natural gas revenues
3,854

 
3,791

 
1,596

 

 

Other revenues
1,903

 
1,484

 
1,140

 
704

 
733

Total
$
23,495

 
$
23,031

 
$
19,896

 
$
17,489

 
$
18,467

Kilowatt-Hour Sales (in millions):
 
 
 
 
 
 
 
 
 
Residential
54,590

 
50,536

 
53,337

 
52,121

 
53,347

Commercial
53,451

 
52,340

 
53,733

 
53,525

 
53,243

Industrial
53,341

 
52,785

 
52,792

 
53,941

 
54,140

Other
799

 
846

 
883

 
897

 
909

Total retail
162,181

 
156,507

 
160,745

 
160,484

 
161,639

Wholesale sales
49,963

 
49,034

 
37,043

 
30,505

 
32,786

Total
212,144

 
205,541

 
197,788

 
190,989

 
194,425

Average Revenue Per Kilowatt-Hour (cents):
 
 
 
 
 
 
 
 
 
Residential
12.10

 
12.89

 
12.40

 
12.25

 
12.18

Commercial
9.85

 
10.39

 
10.04

 
9.93

 
10.27

Industrial
6.04

 
6.18

 
6.01

 
5.88

 
6.37

Total retail
9.39

 
9.80

 
9.48

 
9.34

 
9.62

Wholesale
5.04

 
4.95

 
5.20

 
5.89

 
6.66

Total sales
8.36

 
8.64

 
8.68

 
8.79

 
9.12

Average Annual Kilowatt-Hour
 
 
 
 
 
 
 
 
 
Use Per Residential Customer
12,514

 
11,618

 
12,387

 
13,318

 
13,765

Average Annual Revenue
 
 
 
 
 
 
 
 
 
Per Residential Customer
$
1,555

 
$
1,498

 
$
1,541

 
$
1,630

 
$
1,679

Plant Nameplate Capacity
 
 
 
 
 
 
 
 
 
Ratings (year-end) (megawatts)
45,824

 
46,936

 
46,291

 
44,223

 
46,549

Maximum Peak-Hour Demand (megawatts):
 
 
 
 
 
 
 
 
 
Winter
36,429

 
31,956

 
32,272

 
36,794

 
37,234

Summer
34,841

 
34,874

 
35,781

 
36,195

 
35,396

System Reserve Margin (at peak) (percent)
29.8

 
30.8

 
34.2

 
33.2

 
19.8

Annual Load Factor (percent)
61.2

 
61.4

 
61.5

 
59.9

 
59.6

Plant Availability (percent):
 
 
 
 
 
 
 
 
 
Fossil-steam
81.4

 
84.5

 
86.4

 
86.1

 
85.8

Nuclear
94.0

 
94.7

 
93.3

 
93.5

 
91.5

(a)
The 2016 selected financial and operating data includes the operations of Southern Company Gas from the date of the Merger, July 1, 2016, through December 31, 2016. See Note 15 to the financial statements under "Southern Company Merger with Southern Company Gas" in Item 8 herein for additional information.

II-4

     Table of Contents                                  Index to Financial Statements

SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2014 - 2018 (continued)
Southern Company and Subsidiary Companies 2018 Annual Report
 
2018

 
2017

 
2016 (a)

 
2015

 
2014

Source of Energy Supply (percent):
 
 
 
 
 
 
 
 
 
Gas
41.6

 
41.9

 
41.7

 
42.7

 
37.0

Coal
27.0

 
27.0

 
30.3

 
32.3

 
39.3

Nuclear
13.8

 
14.5

 
14.5

 
15.2

 
14.8

Hydro
2.9

 
2.1

 
2.1

 
2.6

 
2.5

Other
5.4

 
5.4

 
2.4

 
0.8

 
0.4

Purchased power
9.3

 
9.1

 
9.0

 
6.4

 
6.0

Total
100.0

 
100.0

 
100.0

 
100.0

 
100.0

Gas Sales Volumes (mmBtu in millions):
 
 
 
 
 
 
 
 
 
Firm
791

 
729

 
296

 

 

Interruptible
109

 
109

 
53

 

 

Total
900

 
838

 
349

 

 

Traditional Electric Operating Company
   Customers (year-end) (in thousands):
 
 
 
 
 
 
 
 
 
Residential
4,053

 
4,011

 
3,970

 
3,928

 
3,890

Commercial (b)
603

 
599

 
595

 
590

 
586

Industrial (b)
17

 
18

 
17

 
17

 
17

Other
12

 
12

 
11

 
11

 
11

Total electric customers
4,685

 
4,640

 
4,593

 
4,546

 
4,504

Gas distribution operations customers
4,248

 
4,623

 
4,586

 

 

Total utility customers
8,933

 
9,263

 
9,179

 
4,546

 
4,504

Employees (year-end)
30,286

 
31,344

 
32,015

 
26,703

 
26,369

(a)
The 2016 selected financial and operating data includes the operations of Southern Company Gas from the date of the Merger, July 1, 2016, through December 31, 2016. See Note 15 to the financial statements under "Southern Company Merger with Southern Company Gas" in Item 8 herein for additional information.
(b)
A reclassification of customers from commercial to industrial is reflected for years 2014-2015 to be consistent with the rate structure approved by the Georgia PSC. The impact to operating revenues, kilowatt-hour sales, and average revenue per kilowatt-hour by class is not material.


II-5

     Table of Contents                                  Index to Financial Statements

SELECTED FINANCIAL AND OPERATING DATA 2014 - 2018
Alabama Power Company 2018 Annual Report
 
2018

 
2017

 
2016

 
2015

 
2014

Operating Revenues (in millions)
$
6,032

 
$
6,039

 
$
5,889

 
$
5,768

 
$
5,942

Net Income After Dividends
on Preferred and Preference Stock (in millions)
$
930

 
$
848

 
$
822

 
$
785

 
$
761

Cash Dividends on Common Stock (in millions)
$
801

 
$
714

 
$
765

 
$
571

 
$
550

Return on Average Common Equity (percent)
13.00

 
12.89

 
13.34

 
13.37

 
13.52

Total Assets (in millions) (*)
$
26,730

 
$
23,864

 
$
22,516

 
$
21,721

 
$
20,493

Gross Property Additions (in millions)
$
2,273

 
$
1,949

 
$
1,338

 
$
1,492

 
$
1,543

Capitalization (in millions):
 
 
 
 
 
 
 
 
 
Common stockholder's equity
$
7,477

 
$
6,829

 
$
6,323

 
$
5,992

 
$
5,752

Preference stock

 

 
196

 
196

 
343

Redeemable preferred stock
291

 
291

 
85

 
85

 
342

Long-term debt (*)
7,923

 
7,628

 
6,535

 
6,654

 
6,137

Total (excluding amounts due within one year)
$
15,691

 
$
14,748

 
$
13,139

 
$
12,927

 
$
12,574

Capitalization Ratios (percent):
 
 
 
 
 
 
 
 
 
Common stockholder's equity
47.7

 
46.3

 
48.1

 
46.4

 
45.8

Preference stock

 

 
1.5

 
1.5

 
2.7

Redeemable preferred stock
1.9

 
2.0

 
0.7

 
0.7

 
2.7

Long-term debt (*)
50.4

 
51.7

 
49.7

 
51.4

 
48.8

Total (excluding amounts due within one year)
100.0

 
100.0

 
100.0

 
100.0

 
100.0

Customers (year-end):
 
 
 
 
 
 
 
 
 
Residential
1,273,526

 
1,268,271

 
1,262,752

 
1,253,875

 
1,247,061

Commercial
200,032

 
199,840

 
199,146

 
197,920

 
197,082

Industrial
6,158

 
6,171

 
6,090

 
6,056

 
6,032

Other
760

 
766

 
762

 
757

 
753

Total
1,480,476

 
1,475,048

 
1,468,750

 
1,458,608

 
1,450,928

Employees (year-end)
6,650

 
6,613

 
6,805

 
6,986

 
6,935

(*)
A reclassification of debt issuance costs from Total Assets to Long-term debt of $40 million and a reclassification of deferred tax assets from Total Assets to Accumulated deferred income taxes of $20 million is reflected for 2014, in accordance with new accounting standards adopted in 2015 and applied retrospectively.

























II-6

     Table of Contents                                  Index to Financial Statements

SELECTED FINANCIAL AND OPERATING DATA 2014 - 2018 (continued)
Alabama Power Company 2018 Annual Report
 
2018

 
2017

 
2016

 
2015

 
2014

Operating Revenues ( in millions ):
 
 
 
 
 
 
 
 
 
Residential
$
2,335

 
$
2,302

 
$
2,322

 
$
2,207

 
$
2,209

Commercial
1,578

 
1,649

 
1,627

 
1,564

 
1,533

Industrial
1,428

 
1,477

 
1,416

 
1,436

 
1,480

Other
26

 
30

 
(43
)
 
27

 
27

Total retail
5,367

 
5,458

 
5,322

 
5,234

 
5,249

Wholesale — non-affiliates
279

 
276

 
283

 
241

 
281

Wholesale — affiliates
119

 
97

 
69

 
84

 
189

Total revenues from sales of electricity
5,765

 
5,831

 
5,674

 
5,559

 
5,719

Other revenues
267

 
208

 
215

 
209

 
223

Total
$
6,032

 
$
6,039

 
$
5,889

 
$
5,768

 
$
5,942

Kilowatt-Hour Sales ( in millions ):
 
 
 
 
 
 
 
 
 
Residential
18,626

 
17,219

 
18,343

 
18,082

 
18,726

Commercial
13,868

 
13,606

 
14,091

 
14,102

 
14,118

Industrial
23,006

 
22,687

 
22,310

 
23,380

 
23,799

Other
187

 
198

 
208

 
201

 
211

Total retail
55,687

 
53,710

 
54,952

 
55,765

 
56,854

Wholesale — non-affiliates
5,018

 
5,415

 
5,744

 
3,567

 
3,588

Wholesale — affiliates
4,565

 
4,166

 
3,177

 
4,515

 
6,713

Total
65,270

 
63,291

 
63,873

 
63,847

 
67,155

Average Revenue Per Kilowatt-Hour ( cents ):
 
 
 
 
 
 
 
 
 
Residential
12.54

 
13.37

 
12.66

 
12.21

 
11.80

Commercial
11.38

 
12.12

 
11.55

 
11.09

 
10.86

Industrial
6.21

 
6.51

 
6.35

 
6.14

 
6.22

Total retail
9.64

 
10.16

 
9.68

 
9.39

 
9.23

Wholesale
4.15

 
3.89

 
3.95

 
4.02

 
4.56

Total sales
8.83

 
9.21

 
8.88

 
8.71

 
8.52

Residential Average Annual
Kilowatt-Hour Use Per Customer
14,660

 
13,601

 
14,568

 
14,454

 
15,051

Residential Average Annual
Revenue Per Customer
$
1,878

 
$
1,819

 
$
1,844

 
$
1,764

 
$
1,775

Plant Nameplate Capacity
Ratings ( year-end ) ( megawatts )
11,815

 
11,797

 
11,797

 
11,797

 
12,222

Maximum Peak-Hour Demand ( megawatts ):
 
 
 
 
 
 
 
 
 
Winter
11,744

 
10,513

 
10,282

 
12,162

 
11,761

Summer
10,652

 
10,711

 
10,932

 
11,292

 
11,054

Annual Load Factor ( percent )
60.1

 
63.5

 
63.5

 
58.4

 
61.4

Plant Availability ( percent ):
 
 
 
 
 
 
 
 
 
Fossil-steam
81.6

 
82.8

 
83.0

 
81.5

 
82.5

Nuclear
91.6

 
97.6

 
88.0

 
92.1

 
93.3

Source of Energy Supply ( percent ):
 
 
 
 
 
 
 
 
 
Coal
43.8

 
44.8

 
47.1

 
49.1

 
49.0

Nuclear
20.5

 
22.2

 
20.3

 
21.3

 
20.7

Gas
17.2

 
18.1

 
17.1

 
14.6

 
15.4

Hydro
6.7

 
5.4

 
4.8

 
5.6

 
5.5

Purchased power —
 
 
 
 
 
 
 
 
 
From non-affiliates
5.4

 
4.6

 
4.8

 
4.4

 
3.6

From affiliates
6.4

 
4.9

 
5.9

 
5.0

 
5.8

Total
100.0

 
100.0

 
100.0

 
100.0

 
100.0



II-7

     Table of Contents                                  Index to Financial Statements

SELECTED FINANCIAL AND OPERATING DATA 2014 - 2018
Georgia Power Company 2018 Annual Report
 
2018

 
2017

 
2016

 
2015

 
2014

Operating Revenues (in millions)
$
8,420

 
$
8,310

 
$
8,383

 
$
8,326

 
$
8,988

Net Income After Dividends
on Preferred and Preference Stock (in millions)
(a)
$
793

 
$
1,414

 
$
1,330

 
$
1,260

 
$
1,225

Cash Dividends on Common Stock (in millions)
$
1,396

 
$
1,281

 
$
1,305

 
$
1,034

 
$
954

Return on Average Common Equity (percent)
6.04

 
12.15

 
12.05

 
11.92

 
12.24

Total Assets (in millions) (b)
$
40,365

 
$
36,779

 
$
34,835

 
$
32,865

 
$
30,872

Gross Property Additions (in millions)
$
3,176

 
$
1,080

 
$
2,314

 
$
2,332

 
$
2,146

Capitalization (in millions):

 
 
 
 
 
 
 
 
Common stockholder's equity
$
14,323

 
$
11,931

 
$
11,356

 
$
10,719

 
$
10,421

Preferred and preference stock

 

 
266

 
266

 
266

Long-term debt (b)
9,364

 
11,073

 
10,225

 
9,616

 
8,563

Total (excluding amounts due within one year)
$
23,687

 
$
23,004

 
$
21,847

 
$
20,601

 
$
19,250

Capitalization Ratios (percent):

 
 
 
 
 
 
 
 
Common stockholder's equity
60.5

 
51.9

 
52.0

 
52.0

 
54.1

Preferred and preference stock

 

 
1.2

 
1.3

 
1.4

Long-term debt (b)
39.5

 
48.1

 
46.8

 
46.7

 
44.5

Total (excluding amounts due within one year)
100.0

 
100.0

 
100.0

 
100.0

 
100.0

Customers (year-end):
 
 
 
 
 
 
 
 
 
Residential
2,220,240

 
2,185,782

 
2,155,945

 
2,127,658

 
2,102,673

Commercial (c)
312,474

 
308,939

 
305,488

 
302,891

 
300,186

Industrial (c)
10,571

 
10,644

 
10,537

 
10,429

 
10,192

Other
9,838

 
9,766

 
9,585

 
9,261

 
9,003

Total
2,553,123

 
2,515,131

 
2,481,555

 
2,450,239

 
2,422,054

Employees (year-end)
6,967

 
6,986

 
7,527

 
7,989

 
7,909

(a)
Georgia Power recorded a pre-tax estimated probable loss of $1.1 billion ($0.8 billion after tax) in the second quarter 2018 to reflect its revised estimate to complete construction and start-up of Plant Vogtle Units 3 and 4.
(b)
A reclassification of debt issuance costs from Total Assets to Long-term debt of $124 million and a reclassification of deferred tax assets from Total Assets to Accumulated deferred income taxes of $34 million is reflected for 2014, in accordance with new accounting standards adopted in 2015 and applied retrospectively.
(c)
A reclassification of customers from commercial to industrial is reflected for years 2014-2015 to be consistent with the rate structure approved by the Georgia PSC. The impact to operating revenues, kilowatt-hour sales, and average revenue per kilowatt-hour by class is not material.


II-8

     Table of Contents                                  Index to Financial Statements

SELECTED FINANCIAL AND OPERATING DATA 2014 - 2018 (continued)
Georgia Power Company 2018 Annual Report
 
2018

 
2017

 
2016

 
2015

 
2014

Operating Revenues (in millions):
 
 
 
 
 
 
 
 
 
Residential
$
3,301

 
$
3,236

 
$
3,318

 
$
3,240

 
$
3,350

Commercial
3,023

 
3,092

 
3,077

 
3,094

 
3,271

Industrial
1,344

 
1,321

 
1,291

 
1,305

 
1,525

Other
84

 
89

 
86

 
88

 
94

Total retail
7,752

 
7,738

 
7,772

 
7,727

 
8,240

Wholesale — non-affiliates
163

 
163

 
175

 
215

 
335

Wholesale — affiliates
24

 
26

 
42

 
20

 
42

Total revenues from sales of electricity
7,939

 
7,927

 
7,989

 
7,962

 
8,617

Other revenues
481

 
383

 
394

 
364

 
371

Total
$
8,420

 
$
8,310

 
$
8,383

 
$
8,326

 
$
8,988

Kilowatt-Hour Sales (in millions):
 
 
 
 
 
 
 
 
 
Residential
28,331

 
26,144

 
27,585

 
26,649

 
27,132

Commercial
32,958

 
32,155

 
32,932

 
32,719

 
32,426

Industrial
23,655

 
23,518

 
23,746

 
23,805

 
23,549

Other
549

 
584

 
610

 
632

 
633

Total retail
85,493

 
82,401

 
84,873

 
83,805

 
83,740

Wholesale — non-affiliates
3,140

 
3,277

 
3,415

 
3,501

 
4,323

Wholesale — affiliates
526

 
800

 
1,398

 
552

 
1,117

Total
89,159

 
86,478

 
89,686

 
87,858

 
89,180

Average Revenue Per Kilowatt-Hour (cents):
 
 
 
 
 
 
 
 
 
Residential
11.65

 
12.38

 
12.03

 
12.16

 
12.35

Commercial
9.17

 
9.62

 
9.34

 
9.46

 
10.09

Industrial
5.68

 
5.62

 
5.44

 
5.48

 
6.48

Total retail
9.07

 
9.39

 
9.16

 
9.22

 
9.84

Wholesale
5.10

 
4.64

 
4.51

 
5.80

 
6.93

Total sales
8.90

 
9.17

 
8.91

 
9.06

 
9.66

Residential Average Annual
Kilowatt-Hour Use Per Customer
12,849

 
12,028

 
12,864

 
12,582

 
12,969

Residential Average Annual
Revenue Per Customer
$
1,555

 
$
1,489

 
$
1,557

 
$
1,529

 
$
1,605

Plant Nameplate Capacity
Ratings (year-end) (megawatts)
15,308

 
15,274

 
15,274

 
15,455

 
17,593

Maximum Peak-Hour Demand (megawatts):
 
 
 
 
 
 
 
 
 
Winter
15,372

 
13,894

 
14,527

 
15,735

 
16,308

Summer
15,748

 
16,002

 
16,244

 
16,104

 
15,777

Annual Load Factor (percent)
64.5

 
61.1

 
61.9

 
61.9

 
61.2

Plant Availability (percent):
 
 
 
 
 
 
 
 
 
Fossil-steam
81.5

 
85.0

 
87.4

 
85.6

 
86.3

Nuclear
95.0

 
93.5

 
95.6

 
94.1

 
90.8

Source of Energy Supply (percent):
 
 
 
 
 
 
 
 
 
Gas
29.1

 
28.6

 
28.2

 
28.3

 
26.3

Coal
21.1

 
22.4

 
26.4

 
24.5

 
30.9

Nuclear
17.6

 
17.8

 
17.6

 
17.6

 
16.7

Hydro
1.9

 
1.0

 
1.1

 
1.6

 
1.3

Other
0.3

 
0.3

 

 

 

Purchased power —
 
 
 
 
 
 
 
 
 
From non-affiliates
7.3

 
7.8

 
6.7

 
5.0

 
3.8

From affiliates
22.7

 
22.1

 
20.0

 
23.0

 
21.0

Total
100.0

 
100.0

 
100.0

 
100.0

 
100.0



II-9

     Table of Contents                                  Index to Financial Statements

SELECTED FINANCIAL AND OPERATING DATA 2014 - 2018
Mississippi Power Company 2018 Annual Report
 
2018

 
2017

 
2016

 
2015

 
2014

Operating Revenues (in millions)
$
1,265

 
$
1,187

 
$
1,163

 
$
1,138

 
$
1,243

Net Income (Loss) After Dividends
on Preferred Stock (in millions)
(a)(b)
$
235

 
$
(2,590
)
 
$
(50
)
 
$
(8
)
 
$
(329
)
Return on Average Common Equity (percent) (a)(b)
15.83

 
(120.43
)
 
(1.87
)
 
(0.34
)
 
(15.43
)
Total Assets (in millions) (c)
$
4,886

 
$
4,866

 
$
8,235

 
$
7,840

 
$
6,642

Gross Property Additions (in millions)
$
206

 
$
536

 
$
946

 
$
972

 
$
1,389

Capitalization (in millions):
 
 
 
 
 
 
 
 
 
Common stockholder's equity
$
1,609

 
$
1,358

 
$
2,943

 
$
2,359

 
$
2,084

Redeemable preferred stock

 
33

 
33

 
33

 
33

Long-term debt (c)
1,539

 
1,097

 
2,424

 
1,886

 
1,621

Total (excluding amounts due within one year)
$
3,148

 
$
2,488

 
$
5,400

 
$
4,278

 
$
3,738

Capitalization Ratios (percent):
 
 
 
 
 
 
 
 
 
Common stockholder's equity
51.1

 
54.6

 
54.5

 
55.1

 
55.8

Redeemable preferred stock

 
1.3

 
0.6

 
0.8

 
0.9

Long-term debt (c)
48.9

 
44.1

 
44.9

 
44.1

 
43.3

Total (excluding amounts due within one year)
100.0

 
100.0

 
100.0

 
100.0

 
100.0

Customers (year-end):
 
 
 
 
 
 
 
 
 
Residential
153,423

 
153,115

 
153,172

 
153,158

 
152,453

Commercial
33,968

 
33,992

 
33,783

 
33,663

 
33,496

Industrial
445

 
452

 
451

 
467

 
482

Other
188

 
173

 
175

 
175

 
175

Total
188,024

 
187,732

 
187,581

 
187,463

 
186,606

Employees (year-end)
1,053

 
1,242

 
1,484

 
1,478

 
1,478

(a)
As a result of the Tax Reform Legislation, Mississippi Power recorded an income tax expense (benefit) of $(35) million and $372 million in 2018 and 2017, respectively.
(b)
A significant loss to income was recorded by Mississippi Power related to the suspension of the Kemper IGCC in June 2017. Earnings in all periods presented were impacted by losses related to the Kemper IGCC.
(c)
A reclassification of debt issuance costs from Total Assets to Long-term debt of $9 million and a reclassification of deferred tax assets from Total Assets to Accumulated deferred income taxes of $105 million is reflected for 2014, in accordance with new accounting standards adopted in 2015 and applied retrospectively.


II-10

     Table of Contents                                  Index to Financial Statements

SELECTED FINANCIAL AND OPERATING DATA 2014 - 2018 (continued)
Mississippi Power Company 2018 Annual Report
 
2018

 
2017

 
2016

 
2015

 
2014

Operating Revenues (in millions):
 
 
 
 
 
 
 
 
 
Residential
$
273

 
$
257

 
$
260

 
$
238

 
$
239

Commercial
286

 
285

 
279

 
256

 
257

Industrial
321

 
321

 
313

 
287

 
291

Other
9

 
(9
)
 
7

 
(5
)
 
8

Total retail
889

 
854

 
859

 
776

 
795

Wholesale — non-affiliates
263

 
259

 
261

 
270

 
323

Wholesale — affiliates
91

 
56

 
26

 
76

 
107

Total revenues from sales of electricity
1,243

 
1,169

 
1,146

 
1,122

 
1,225

Other revenues
22

 
18

 
17

 
16

 
18

Total
$
1,265

 
$
1,187

 
$
1,163

 
$
1,138

 
$
1,243

Kilowatt-Hour Sales (in millions):
 
 
 
 
 
 
 
 
 
Residential
2,113

 
1,944

 
2,051

 
2,025

 
2,126

Commercial
2,797

 
2,764

 
2,842

 
2,806

 
2,860

Industrial
4,924

 
4,841

 
4,906

 
4,958

 
4,943

Other
37

 
39

 
39

 
40

 
40

Total retail
9,871

 
9,588

 
9,838

 
9,829

 
9,969

Wholesale — non-affiliates
3,980

 
3,672

 
3,920

 
3,852

 
4,191

Wholesale — affiliates
2,584

 
2,024

 
1,108

 
2,807

 
2,900

Total
16,435

 
15,284

 
14,866

 
16,488

 
17,060

Average Revenue Per Kilowatt-Hour (cents):
 
 
 
 
 
 
 
 
 
Residential
12.92

 
13.22

 
12.68

 
11.75

 
11.26

Commercial
10.23

 
10.31

 
9.82

 
9.12

 
8.99

Industrial
6.52

 
6.63

 
6.38

 
5.79

 
5.89

Total retail
9.01

 
8.91

 
8.73

 
7.90

 
7.97

Wholesale
5.39

 
5.53

 
5.71

 
5.20

 
6.06

Total sales
7.56

 
7.65

 
7.71

 
6.80

 
7.18

Residential Average Annual
Kilowatt-Hour Use Per Customer
13,768

 
12,692

 
13,383

 
13,242

 
13,934

Residential Average Annual
Revenue Per Customer
$
1,780

 
$
1,680

 
$
1,697

 
$
1,556

 
$
1,568

Plant Nameplate Capacity
Ratings (year-end) (megawatts)
3,516

 
3,628

 
3,481

 
3,561

 
3,867

Maximum Peak-Hour Demand (megawatts):
 
 
 
 
 
 
 
 
 
Winter
2,763

 
2,390

 
2,195

 
2,548

 
2,618

Summer
2,346

 
2,322

 
2,384

 
2,403

 
2,345

Annual Load Factor (percent)
55.8

 
63.1

 
64.0

 
60.6

 
59.4

Plant Availability Fossil-Steam (percent)
82.4

 
89.1

 
91.4

 
90.6

 
87.6

Source of Energy Supply (percent):
 
 
 
 
 
 
 
 
 
Gas
86.1

 
88.0

 
84.9

 
81.6

 
55.3

Coal
6.9

 
7.5

 
8.0

 
16.5

 
39.7

Purchased power —
 
 
 
 
 
 
 
 
 
From non-affiliates
4.7

 
0.5

 
(0.3
)
 
0.4

 
1.4

From affiliates
2.3

 
4.0

 
7.4

 
1.5

 
3.6

Total
100.0

 
100.0

 
100.0

 
100.0

 
100.0



II-11

     Table of Contents                                  Index to Financial Statements

SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2014 - 2018
Southern Power Company and Subsidiary Companies 2018 Annual Report
 
2018

 
2017

 
2016

 
2015

 
2014

Operating Revenues (in millions):
 
 
 
 
 
 
 
 
 
Wholesale — non-affiliates
$
1,757

 
$
1,671

 
$
1,146

 
$
964

 
$
1,116

Wholesale — affiliates
435

 
392

 
419

 
417

 
383

Total revenues from sales of electricity
2,192

 
2,063

 
1,565

 
1,381

 
1,499

Other revenues
13

 
12

 
12

 
9

 
2

Total
$
2,205

 
$
2,075

 
$
1,577

 
$
1,390

 
$
1,501

Net Income Attributable to
   Southern Power (in millions) (a)
$
187

 
$
1,071

 
$
338

 
$
215

 
$
172

Cash Dividends
   on Common Stock (in millions)
$
312

 
$
317

 
$
272

 
$
131

 
$
131

Return on Average Common Equity (percent) (a)
4.62

 
22.39

 
9.79

 
10.16

 
10.39

Total Assets (in millions) (b)
$
14,883

 
$
15,206

 
$
15,169

 
$
8,905

 
$
5,233

Property, Plant, and Equipment
   In Service (in millions)
$
13,271

 
$
13,755

 
$
12,728

 
$
7,275

 
$
5,657

Capitalization (in millions):
 
 
 
 
 
 
 
 
 
Common stockholders' equity
$
2,968

 
$
5,138

 
$
4,430

 
$
2,483

 
$
1,752

Noncontrolling interests
4,316

 
1,360

 
1,245

 
781

 
219

Redeemable noncontrolling interests

 

 
164

 
43

 
39

Long-term debt (b)
4,418

 
5,071

 
5,068

 
2,719

 
1,085

Total (excluding amounts due within one year)
$
11,702

 
$
11,569

 
$
10,907

 
$
6,026

 
$
3,095

Capitalization Ratios (percent):
 
 
 
 
 
 
 
 
 
Common stockholders' equity
25.4

 
44.4

 
40.6

 
41.2

 
56.6

Noncontrolling interests
36.9

 
11.8

 
11.4

 
13.0

 
7.1

Redeemable noncontrolling interests

 

 
1.5

 
0.7

 
1.3

Long-term debt (b)
37.7

 
43.8

 
46.5

 
45.1

 
35.0

Total (excluding amounts due within one year)
100.0

 
100.0

 
100.0

 
100.0

 
100.0

Kilowatt-Hour Sales (in millions):
 
 
 
 
 
 
 
 
 
Wholesale — non-affiliates
37,164

 
35,920

 
23,213

 
18,544

 
19,014

Wholesale — affiliates
12,603

 
12,811

 
15,950

 
16,567

 
11,194

Total
49,767

 
48,731

 
39,163

 
35,111

 
30,208

Plant Nameplate Capacity
   Ratings (year-end) (megawatts)
11,888

 
12,940

 
12,442

 
9,808

 
9,185

Maximum Peak-Hour Demand (megawatts):
 
 
 
 
 
 
 
 
 
Winter
2,867

 
3,421

 
3,469

 
3,923

 
3,999

Summer
4,210

 
4,224

 
4,303

 
4,249

 
3,998

Annual Load Factor (percent)
52.2

 
49.1

 
50.0

 
49.0

 
51.8

Plant Availability (percent)
99.9

 
99.9

 
91.6

 
93.1

 
91.8

Source of Energy Supply (percent):
 
 
 
 
 
 
 
 
 
Natural gas
68.1

 
67.7

 
79.4

 
89.5

 
86.0

Solar, Wind, and Biomass
23.6

 
22.8

 
12.1

 
4.3

 
2.9

Purchased power —
 
 
 
 
 
 
 
 
 
From non-affiliates
6.6

 
7.8

 
6.8

 
4.7

 
6.4

From affiliates
1.7

 
1.7

 
1.7

 
1.5

 
4.7

Total
100.0

 
100.0

 
100.0

 
100.0

 
100.0

Employees (year-end) (c)
491

 
541

 

 

 

(a)
As a result of the Tax Reform Legislation, Southern Power recorded an income tax expense (benefit) of $79 million and $(743) million in 2018 and 2017, respectively.
(b)
A reclassification of debt issuance costs from Total Assets to Long-term debt of $11 million and a reclassification of deferred tax assets from Total Assets to Accumulated deferred income taxes of $306 million is reflected for 2014, in accordance with new accounting standards adopted in 2015 and applied retrospectively.
(c)
Prior to December 2017, Southern Power had no employees but was billed for employee-related costs from SCS.

II-12

     Table of Contents                                  Index to Financial Statements

SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2014 - 2018
Southern Company Gas and Subsidiary Companies 2018 Annual Report
 
Successor (a)
 
 
Predecessor (a)
 
2018 (b)
 
2017
 
July 1, 2016 through December 31, 2016
 
 
January 1, 2016 through June 30, 2016
 
2015
 
2014
Operating Revenues (in millions)
$
3,909

 
$
3,920

 
$
1,652

 
 
$
1,905

 
$
3,941

 
$
5,385

Net Income Attributable to
Southern Company Gas
(in millions)
(c)
$
372

 
$
243

 
$
114

 
 
$
131

 
$
353

 
$
482

Cash Dividends on Common Stock
(in millions)
$
468

 
$
443

 
$
126

 
 
$
128

 
$
244

 
$
233

Return on Average Common Equity
(percent)
(c)
4.23

 
2.68

 
1.74

 
 
3.31

 
9.05

 
12.96

Total Assets (in millions)
$
21,448

 
$
22,987

 
$
21,853

 
 
$
14,488

 
$
14,754

 
$
14,888

Gross Property Additions
(in millions)
$
1,399

 
$
1,525

 
$
632

 
 
$
548

 
$
1,027

 
$
769

Capitalization (in millions):
 
 
 
 
 
 
 
 
 
 
 
 
Common stockholders' equity
$
8,570

 
$
9,022

 
$
9,109

 
 
$
3,933

 
$
3,975

 
$
3,828

Long-term debt
5,583

 
5,891

 
5,259

 
 
3,709

 
3,275

 
3,581

Total (excluding amounts due within
one year)
$
14,153

 
$
14,913

 
$
14,368

 
 
$
7,642

 
$
7,250

 
$
7,409

Capitalization Ratios (percent):
 
 
 
 
 
 
 
 
 
 
 
 
Common stockholders' equity
60.6

 
60.5

 
63.4

 
 
51.5

 
54.8

 
51.7

Long-term debt
39.4

 
39.5

 
36.6

 
 
48.5

 
45.2

 
48.3

Total (excluding amounts due within
one year)
100.0

 
100.0

 
100.0

 
 
100.0

 
100.0

 
100.0

Service Contracts (period-end)

 
1,184,257

 
1,198,263

 
 
1,197,096

 
1,205,476

 
1,162,065

Customers (period-end)
 
 
 
 
 
 
 
 
 
 
 
 
Gas distribution operations
4,247,804

 
4,623,249

 
4,586,477

 
 
4,544,489

 
4,557,729

 
4,529,114

Gas marketing services
697,384

 
773,984

 
655,999

 
 
630,475

 
654,475

 
633,460

Total
4,945,188

 
5,397,233

 
5,242,476

 
 
5,174,964

 
5,212,204

 
5,162,574

Employees (period-end)
4,389

 
5,318

 
5,292

 
 
5,284

 
5,203

 
5,165

(a)
As a result of the Merger, pushdown accounting was applied to create a new cost basis for Southern Company Gas' assets, liabilities, and equity as of the acquisition date. Accordingly, the successor financial statements reflect the new basis of accounting, and successor and predecessor period financial results are presented but are not comparable.
(b)
During 2018, Southern Company Gas completed the Southern Company Gas Dispositions. See Note 15 to the financial statements under "Southern Company Gas" in Item 8 herein for additional information.
(c)
As a result of the Tax Reform Legislation, Southern Company Gas recorded income tax expense (benefit) of $(3) million and $93 million in 2018 and 2017, respectively.


II-13

     Table of Contents                                  Index to Financial Statements

SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2014 - 2018 (continued)
Southern Company Gas and Subsidiary Companies 2018 Annual Report
 
Successor (a)
 
 
Predecessor (a)
 
2018 (b)
 
2017
 
July 1, 2016 through December 31, 2016
 
 
January 1, 2016 through June 30, 2016
 
2015
 
2014
Operating Revenues (in millions)
 
 
 
 
 
 
 
 
 
 
 
 
Residential
$
1,886

 
$
2,100

 
$
899

 
 
$
1,101

 
$
2,129

 
$
2,877

Commercial
546

 
641

 
260

 
 
310

 
617

 
861

Transportation
944

 
811

 
269

 
 
290

 
526

 
458

Industrial
140

 
159

 
74

 
 
72

 
203

 
242

Other
393

 
209

 
150

 
 
132

 
466

 
947

Total
$
3,909

 
$
3,920

 
$
1,652

 
 
$
1,905

 
$
3,941

 
$
5,385

Heating Degree Days:
 
 
 
 
 
 
 
 
 
 
 
 
Illinois
6,101

 
5,246

 
1,903

 
 
3,340

 
5,433

 
6,556

Georgia
2,588

 
1,970

 
727

 
 
1,448

 
2,204

 
2,882

Gas Sales Volumes
(mmBtu in millions):
 
 
 
 
 
 
 
 
 
 
 
 
Gas distribution operations
 
 
 
 
 
 
 
 
 
 
 
 
Firm
721

 
667

 
274

 
 
396

 
695

 
766

Interruptible
95

 
95

 
47

 
 
49

 
99

 
106

Total
816

 
762

 
321

 
 
445

 
794

 
872

Gas marketing services
 
 
 
 
 
 
 
 
 
 
 
 
Firm:
 
 
 
 
 
 
 
 
 
 
 
 
Georgia
37

 
32

 
13

 
 
21

 
35

 
41

Illinois
13

 
12

 
4

 
 
8

 
13

 
17

Other
20

 
18

 
5

 
 
7

 
11

 
10

Interruptible large commercial and
industrial
14

 
14

 
6

 
 
8

 
14

 
17

Total
84

 
76

 
28

 
 
44

 
73

 
85

Market share in Georgia (percent)
29.0

 
29.2

 
29.4

 
 
29.3

 
29.7

 
30.6

Wholesale gas services
 
 
 
 
 
 
 
 
 
 
 
 
Daily physical sales ( mmBtu in
millions/day
)
6.7

 
6.4

 
7.2

 
 
7.6

 
6.8

 
6.3

(a)
As a result of the Merger, pushdown accounting was applied to create a new cost basis for Southern Company Gas' assets, liabilities, and equity as of the acquisition date. Accordingly, the successor financial statements reflect the new basis of accounting, and successor and predecessor period financial results are presented but are not comparable.
(b)
During 2018, Southern Company Gas completed the Southern Company Gas Dispositions. See Note 15 to the financial statements under "Southern Company Gas" in Item 8 herein for additional information.


II-14

     Table of Contents                                  Index to Financial Statements

Item 7.
MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
Page

II-15

     Table of Contents                                  Index to Financial Statements     

MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
Southern Company and Subsidiary Companies 2018 Annual Report



OVERVIEW
Business Activities
Southern Company is a holding company that owns all of the common stock of the traditional electric operating companies and the parent entities of Southern Power and Southern Company Gas and owns other direct and indirect subsidiaries. The primary businesses of the Southern Company system are electricity sales by the traditional electric operating companies and Southern Power and the distribution of natural gas by Southern Company Gas.
The traditional electric operating companies are vertically integrated utilities providing electric service in three Southeastern states as of January 1, 2019. On January 1, 2019, Southern Company completed its sale of Gulf Power to NextEra Energy for an aggregate cash purchase price of approximately $5.8 billion (less $1.3 billion of indebtedness assumed), subject to customary working capital adjustments. At December 31, 2018, the assets and liabilities of Gulf Power were classified as held for sale on Southern Company's balance sheet. Unless otherwise noted, the disclosures herein related to specific asset and liability balances at December 31, 2018 exclude assets and liabilities held for sale. See Note 15 under " Assets Held for Sale " for additional information. A preliminary gain of $2.5 billion pre-tax ($1.3 billion after tax) associated with the sale of Gulf Power is expected to be recorded in 2019.
Southern Power develops, constructs, acquires, owns, and manages power generation assets, including renewable energy projects, and sells electricity at market-based rates in the wholesale market. On May 22, 2018, Southern Power sold a noncontrolling 33% equity interest in SP Solar, a limited partnership indirectly owning substantially all of Southern Power's solar facilities, for approximately $1.2 billion and, on December 11, 2018, Southern Power sold a noncontrolling tax equity interest in SP Wind, a holding company owning a portfolio of eight operating wind facilities, for approximately $1.2 billion. On November 5, 2018, Southern Power entered into an agreement to sell all of its equity interests in Plant Mankato (including the 385-MW expansion currently under construction) for an aggregate purchase price of approximately $650 million, which is expected to close mid-2019. The ultimate outcome of this matter cannot be determined at this time.
Southern Company Gas distributes natural gas through its natural gas distribution utilities and is involved in several other complementary businesses including gas pipeline investments, wholesale gas services, and gas marketing services. In July 2018, Southern Company Gas completed sales of three of its natural gas distribution utilities.
See FUTURE EARNINGS POTENTIAL – "General" herein and Note 15 to the financial statements for additional information regarding disposition activities.
Many factors affect the opportunities, challenges, and risks of the Southern Company system's electricity and natural gas businesses. These factors include the ability to maintain constructive regulatory environments, to maintain and grow sales and customers, and to effectively manage and secure timely recovery of costs. These costs include those related to projected long-term demand growth, stringent environmental standards, including CCR rules, reliability, fuel, restoration following major storms, and capital expenditures, including constructing new electric generating plants, expanding and improving the electric transmission and distribution systems, and updating and expanding the natural gas distribution systems.
The traditional electric operating companies and natural gas distribution utilities have various regulatory mechanisms that operate to address cost recovery. Effectively operating pursuant to these regulatory mechanisms and appropriately balancing required costs and capital expenditures with customer prices will continue to challenge the Southern Company system for the foreseeable future. See Note 2 to the financial statements for additional information.
In 2018, Alabama Power, Georgia Power, Mississippi Power, Atlanta Gas Light, and Nicor Gas reached agreements with their respective state PSCs or other applicable state regulatory agencies relating to the regulatory impacts of the Tax Reform Legislation, which, for some companies, included capital structure adjustments expected to help mitigate the potential adverse impacts to certain of their credit metrics. See Note 2 to the financial statements for additional information regarding state PSC or other regulatory agency actions related to the Tax Reform Legislation. Also see MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Income Tax Matters" and FINANCIAL CONDITION AND LIQUIDITY – "Credit Rating Risk" herein and Note 10 to the financial statements for information regarding the Tax Reform Legislation.
Another major factor affecting the Southern Company system's businesses is the profitability of the competitive market-based wholesale generating business. Southern Power's strategy is to create value through various transactions including acquisitions, dispositions, and sales of partnership interests, development and construction of new generating facilities, and entry into PPAs primarily with investor-owned utilities, IPPs, municipalities, electric cooperatives, and other load-serving entities, as well as commercial and industrial customers. In general, Southern Power commits to the construction or acquisition of new generating capacity only after entering into or assuming long-term PPAs for the new facilities.

II-16

     Table of Contents                                  Index to Financial Statements         

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report


Southern Company's other business activities include providing energy solutions, including distributed energy infrastructure, energy efficiency products and services, and utility infrastructure services, to customers. Other business activities also include investments in telecommunications, leveraged lease projects, and gas storage facilities. Management continues to evaluate the contribution of each of these activities to total shareholder return and may pursue acquisitions, dispositions, and other strategic ventures or investments accordingly.
In striving to achieve attractive risk-adjusted returns while providing cost-effective energy to more than eight million electric and gas utility customers, the Southern Company system continues to focus on several key performance indicators. These indicators include, but are not limited to, customer satisfaction, plant availability, electric and natural gas system reliability, execution of major construction projects, and earnings per share (EPS). Southern Company's financial success is directly tied to customer satisfaction. Key elements of ensuring customer satisfaction include outstanding service, high reliability, and competitive prices. Management uses customer satisfaction surveys and reliability indicators to evaluate the results of the Southern Company system.
See RESULTS OF OPERATIONS herein for information on Southern Company's financial performance.
Plant Vogtle Units 3 and 4 Status
In 2009, the Georgia PSC certified construction of Plant Vogtle Units 3 and 4 (with electric generating capacity of approximately 1,100 MWs each). Georgia Power holds a 45.7% ownership interest in Plant Vogtle Units 3 and 4. In March 2017, the EPC Contractor filed for bankruptcy protection under Chapter 11 of the U.S. Bankruptcy Code. In December 2017, the Georgia PSC approved Georgia Power's recommendation to continue construction. The current expected in-service dates remain November 2021 for Unit 3 and November 2022 for Unit 4.
In the second quarter 2018, Georgia Power revised its base capital cost forecast and estimated contingency to complete construction and start-up of Plant Vogtle Units 3 and 4 to $8.0 billion and $0.4 billion , respectively, for a total project capital cost forecast of $8.4 billion (net of $1.7 billion received under the Guarantee Settlement Agreement and approximately $188 million in related Customer Refunds), with respect to Georgia Power's ownership interest. Although Georgia Power believes these incremental costs are reasonable and necessary to complete the project and the Georgia PSC's order in the seventeenth VCM proceeding specifically states that the construction of Plant Vogtle Units 3 and 4 is not subject to a cost cap, Georgia Power did not seek rate recovery for the $0.7 billion increase in costs included in the current base capital cost forecast (or any related financing costs) in the nineteenth VCM report that was approved by the Georgia PSC on February 19, 2019. In connection with future VCM filings, Georgia Power may request the Georgia PSC to evaluate costs currently included in the construction contingency estimate for rate recovery as and when they are appropriately included in the base capital cost forecast. After considering the significant level of uncertainty that exists regarding the future recoverability of costs included in the construction contingency estimate since the ultimate outcome of these matters is subject to the outcome of future assessments by management, as well as Georgia PSC decisions in these future regulatory proceedings, Georgia Power recorded a total pre-tax charge to income of $1.1 billion ( $0.8 billion after tax) in the second quarter 2018.
As a result of the increase in the total project capital cost forecast and Georgia Power's decision not to seek rate recovery of the increase in the base capital costs, the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 were required to vote to continue construction. On September 26, 2018, the Vogtle Owners unanimously voted to continue construction of Plant Vogtle Units 3 and 4. In connection with the vote to continue construction, Georgia Power entered into (i) a binding term sheet (Vogtle Owner Term Sheet) with the other Vogtle Owners and certain of MEAG's wholly-owned subsidiaries, including MEAG Power SPVJ, LLC (MEAG SPVJ), to take certain actions which partially mitigate potential financial exposure for the other Vogtle Owners and (ii) a term sheet (MEAG Term Sheet) with MEAG and MEAG SPVJ to provide funding with respect to MEAG SPVJ's ownership interest in Plant Vogtle Units 3 and 4 under certain circumstances. On January 14, 2019, Georgia Power, MEAG, and MEAG SPVJ entered into an agreement to implement the provisions of the MEAG Term Sheet. On February 18, 2019, Georgia Power, the other Vogtle Owners, and certain of MEAG's wholly-owned subsidiaries entered into certain amendments to their joint ownership agreements to implement the provisions of the Vogtle Owner Term Sheet.
The ultimate outcome of these matters cannot be determined at this time.
See FUTURE EARNINGS POTENTIAL – " Construction Program Nuclear Construction " herein for additional information on Plant Vogtle Units 3 and 4.
Earnings
Consolidated net income attributable to Southern Company was $2.2 billion in 2018 , an increase of $1.4 billion , or 164.4% , from the prior year. The increase was primarily due to charges of $3.4 billion ($2.4 billion after tax) in 2017 related to the Kemper IGCC at Mississippi Power, partially offset by a $1.1 billion ($0.8 billion after tax) charge in the second quarter 2018 for an

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report


estimated probable loss on Georgia Power's construction of Plant Vogtle Units 3 and 4. The increase also reflects lower federal income tax expense as a result of the Tax Reform Legislation, partially offset by impairment charges, primarily associated with asset sales at Southern Power and Southern Company Gas.
Consolidated net income attributable to Southern Company was $842 million in 2017 , a decrease of $1.6 billion , or 65.6% , from the prior year. The decrease was primarily due to pre-tax charges of $3.4 billion ($2.4 billion after tax) related to the Kemper IGCC at Mississippi Power. Also contributing to the change were increases of $240 million in net income from Southern Company Gas (excluding the impact of $111 million in additional expense related to the Tax Reform Legislation) reflecting the 12-month period in 2017 compared to the six-month period following the Merger closing on July 1, 2016, $264 million related to net tax benefits from the Tax Reform Legislation, higher retail electric revenues resulting from increases in base rates partially offset by milder weather and lower customer usage, and increases in renewable energy sales at Southern Power. These increases were partially offset by higher interest and depreciation and amortization.
See Note 15 to the financial statements under " Southern Company Merger with Southern Company Gas " for additional information regarding the Merger.
Basic EPS was $2.18 in 2018 , $0.84 in 2017 , and $2.57 in 2016 . Diluted EPS, which factors in additional shares related to stock-based compensation, was $2.17 in 2018 , $0.84 in 2017 , and $2.55 in 2016 . EPS for 2018 , 2017, and 2016 was negatively impacted by $0.04, $0.04, and $0.12 per share, respectively, as a result of increases in the average shares outstanding. See FINANCIAL CONDITION AND LIQUIDITY – " Financing Activities " herein for additional information.
Dividends
Southern Company has paid dividends on its common stock since 1948. Dividends paid per share of common stock were $2.38 in 2018 , $2.30 in 2017 , and $2.22 in 2016 . In January 2019 , Southern Company declared a quarterly dividend of 60 cents per share. This is the 285th consecutive quarter that Southern Company has paid a dividend equal to or higher than the previous quarter. For 2018 , the dividend payout ratio was 109% compared to 273% for 2017 . The decrease was due to an increase in earnings in 2018 resulting from charges related to the Kemper IGCC in 2017, partially offset by the charge related to construction of Plant Vogtle Units 3 and 4 in 2018. See " Earnings " and RESULTS OF OPERATIONS – " Electricity Business Estimated Loss on Projects Under Construction " herein and Note 2 to the financial statements under " Georgia Power Nuclear Construction " and " Mississippi Power Kemper County Energy Facility " for additional information.
RESULTS OF OPERATIONS
Discussion of the results of operations is divided into three parts – the Southern Company system's primary business of electricity sales, its gas business, and its other business activities.
 
2018
 
2017
 
2016
 
(in millions)
Electricity business
$
2,304

 
$
878

 
$
2,571

Gas business
372

 
243

 
114

Other business activities
(450
)
 
(279
)
 
(237
)
Net Income
$
2,226

 
$
842

 
$
2,448


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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report


Electricity Business
Southern Company's electric utilities generate and sell electricity to retail and wholesale customers. The results of operations discussed below include the results of Gulf Power through December 31, 2018. See Note 15 to the financial statements under " Southern Company's Sale of Gulf Power " for additional information.
A condensed statement of income for the electricity business follows:
 
Amount
 
Increase (Decrease)
from Prior Year
 
2018
 
2018
 
2017
 
(in millions)
Electric operating revenues
$
18,571

 
$
31

 
$
599

Fuel
4,637

 
237

 
39

Purchased power
971


108

 
113

Cost of other sales
66

 
(3
)
 
11

Other operations and maintenance
4,635

 
45

 
(76
)
Depreciation and amortization
2,565

 
108

 
224

Taxes other than income taxes
1,098

 
35

 
24

Estimated loss on plants under construction
1,097

 
(2,265
)
 
2,934

Impairment charges
156

 
156

 

Gain on dispositions, net

 
40

 
(41
)
Total electric operating expenses
15,225

 
(1,539
)
 
3,228

Operating income
3,346

 
1,570

 
(2,629
)
Allowance for equity funds used during construction
131

 
(21
)
 
(48
)
Interest expense, net of amounts capitalized
1,035

 
24

 
80

Other income (expense), net
144

 
17

 
58

Income taxes
207

 
125

 
(1,009
)
Net income
2,379

 
1,417

 
(1,690
)
Less:
 
 
 
 
 
Dividends on preferred and preference stock of subsidiaries
16

 
(22
)
 
(7
)
Net income attributable to noncontrolling interests
59

 
13

 
10

Net Income Attributable to Southern Company
$
2,304

 
$
1,426

 
$
(1,693
)

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report


Electric Operating Revenues
Electric operating revenues for 2018 were $18.6 billion , reflecting a $31 million increase from 2017. Details of electric operating revenues were as follows:
 
2018
 
2017
 
(in millions)
Retail electric — prior year
$
15,330

 
$
15,234

Estimated change resulting from —
 
 
 
Rates and pricing
(773
)
 
508

Sales growth (decline)
84

 
(71
)
Weather
300

 
(281
)
Fuel and other cost recovery
281

 
(60
)
Retail electric — current year
15,222

 
15,330

Wholesale electric revenues
2,516

 
2,426

Other electric revenues
664

 
681

Other revenues
169

 
103

Electric operating revenues
$
18,571

 
$
18,540

Percent change
0.2
%
 
3.3
%
Retail electric revenues decreased $108 million , or 0.7% , in 2018 as compared to the prior year. The significant factors driving this change are shown in the preceding table. The decrease in rates and pricing in 2018 was primarily due to revenues deferred as regulatory liabilities for customer bill credits related to the Tax Reform Legislation and expected customer refunds at Alabama Power and Georgia Power.
Retail electric revenues increased $96 million , or 0.6% , in 2017 as compared to the prior year. The significant factors driving this change are shown in the preceding table. The increase in rates and pricing in 2017 was primarily due to a Rate RSE increase at Alabama Power effective in January 2017, the recovery of Plant Vogtle Units 3 and 4 construction financing costs under the NCCR tariff at Georgia Power, and an increase in retail base rates effective July 2017 at Gulf Power.
See Note 2 to the financial statements under " Southern Company Gulf Power ," " Alabama Power Rate RSE " and " – Rate CNP Compliance ," " Georgia Power Rate Plans ," and " – Nuclear Construction " for additional information. Also see "Energy Sales" below for a discussion of changes in the volume of energy sold, including changes related to sales growth (decline) and weather.
Electric rates for the traditional electric operating companies include provisions to adjust billings for fluctuations in fuel costs, including the energy component of purchased power costs. Under these provisions, fuel revenues generally equal fuel expenses, including the energy component of PPA costs, and do not affect net income. The traditional electric operating companies each have one or more regulatory mechanisms to recover other costs such as environmental and other compliance costs, storm damage, new plants, and PPA capacity costs.
Wholesale electric revenues consist of PPAs and short-term opportunity sales. Wholesale electric revenues from PPAs (other than solar and wind PPAs) have both capacity and energy components. Capacity revenues generally represent the greatest contribution to net income and are designed to provide recovery of fixed costs plus a return on investment. Energy revenues will vary depending on fuel prices, the market prices of wholesale energy compared to the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and the availability of the Southern Company system's generation. Increases and decreases in energy revenues that are driven by fuel prices are accompanied by an increase or decrease in fuel costs and do not have a significant impact on net income. Energy sales from solar and wind PPAs do not have a capacity charge and customers either purchase the energy output of a dedicated renewable facility through an energy charge or through a fixed price related to the energy. As a result, the ability to recover fixed and variable operations and maintenance expenses is dependent upon the level of energy generated from these facilities, which can be impacted by weather conditions, equipment performance, transmission constraints, and other factors. Wholesale electric revenues at Mississippi Power include FERC-regulated MRA sales as well as market-based sales. Short-term opportunity sales are made at market-based rates that generally provide a margin above the Southern Company system's variable cost to produce the energy.

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Southern Company and Subsidiary Companies 2018 Annual Report


Wholesale electric revenues from power sales were as follows:
 
2018
 
2017
 
2016
 
(in millions)
Capacity and other
$
620

 
$
642

 
$
570

Energy
1,896

 
1,784

 
1,356

Total
$
2,516

 
$
2,426

 
$
1,926

In 2018 , wholesale revenues increased $90 million , or 3.7% , as compared to the prior year due to a $112 million increase in energy revenues, partially offset by a $22 million decrease in capacity revenues. The increase in energy revenues was primarily related to Southern Power and includes new PPAs related to existing natural gas facilities, new renewable facilities, and an increase in the volume of KWHs sold at existing renewable facilities, partially offset by a decrease in non-PPA revenues from short-term sales. The decrease in capacity revenues was primarily due to the expiration of a wholesale contract in the fourth quarter 2017 at Georgia Power.
In 2017 , wholesale revenues increased $500 million , or 26.0% , as compared to the prior year due to a $428 million increase in energy revenues and a $72 million increase in capacity revenues, primarily at Southern Power. The increase in energy revenues was primarily due to increases in renewable energy sales arising from new solar and wind facilities and non-PPA revenues from short-term sales. The increase in capacity revenues was primarily due to a PPA related to new natural gas facilities and additional customer capacity requirements.
Other Electric Revenues
Other electric revenues decreased $17 million , or 2.5% , in 2018 as compared to the prior year. The decrease is primarily related to a decrease in open access transmission tariff revenues, largely due to a lower rate related to the Tax Reform Legislation. Other electric revenues decreased $17 million , or 2.4% , in 2017 , as compared to the prior year. The decrease reflects a $15 million decrease in open access transmission tariff revenues, primarily as a result of the expiration of long-term transmission services contracts at Georgia Power.
Energy Sales
Changes in revenues are influenced heavily by the change in the volume of energy sold from year to year. KWH sales for 2018 and the percent change from the prior year were as follows:
 
Total
KWHs
 
Total KWH
Percent Change
 
Weather-Adjusted
Percent Change
 
2018
 
2018
 
2017
 
2018
 
2017
 
(in billions)
 
 
 
 
 
 
 
 
Residential
54.6

 
8.0
 %
 
(5.3
)%
 
1.2
 %
 
(0.3
)%
Commercial
53.5

 
2.1

 
(2.6
)
 
0.5

 
(0.9
)
Industrial
53.3

 
1.1

 

 
1.1

 

Other
0.8

 
(5.5
)
 
(4.0
)
 
(5.7
)
 
(3.9
)
Total retail
162.2

 
3.6

 
(2.6
)
 
0.9
 %
 
(0.4
)%
Wholesale
49.9

 
1.9

 
32.4

 
 
 
 
Total energy sales
212.1

 
3.2
 %
 
3.9
 %
 
 
 
 
Changes in retail energy sales are generally the result of changes in electricity usage by customers, changes in weather, and changes in the number of customers. Retail energy sales increased 5.7 billion KWHs in 2018 as compared to the prior year. This increase was primarily due to colder weather in the first quarter 2018 and warmer weather in the second and third quarters 2018 compared to the corresponding periods in 2017. Weather-adjusted residential KWH sales increased primarily due to customer growth. Weather-adjusted commercial KWH sales increased primarily due to customer growth, partially offset by decreased customer usage resulting from customer initiatives in energy savings and an ongoing migration to the electronic commerce business model. Industrial KWH energy sales increased primarily due to increased sales in the primary metals sector, partially offset by decreased sales in the paper sector.
Retail energy sales decreased 4.2 billion KWHs in 2017 as compared to the prior year. This decrease was primarily due to milder weather and decreased customer usage, partially offset by customer growth. Weather-adjusted residential KWH sales decreased

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report


primarily due to decreased customer usage resulting from an increase in penetration of energy-efficient residential appliances and an increase in multi-family housing, partially offset by customer growth. Weather-adjusted commercial KWH sales decreased primarily due to decreased customer usage resulting from customer initiatives in energy savings and an ongoing migration to the electronic commerce business model, partially offset by customer growth. Industrial KWH energy sales were flat primarily due to decreased sales in the paper, stone, clay, and glass, transportation, and chemicals sectors, offset by increased sales in the primary metals and textile sectors. Additionally, Hurricane Irma negatively impacted customer usage for all customer classes.
See "Electric Operating Revenues" above for a discussion of significant changes in wholesale revenues related to changes in price and KWH sales.
Other Revenues
Other revenues increased $66 million , or 64.1% , in 2018 as compared to the prior year. The increase was primarily due to unregulated sales of products and services that were reclassified from other income (expense), net as a result of the adoption of ASC 606, Revenue from Contracts with Customers (ASC 606). See Note 1 to the financial statements for additional information regarding the adoption of ASC 606.
Other revenues increased $20 million in 2017 as compared to the prior year. The increase was primarily due to additional third party infrastructure services.
Fuel and Purchased Power Expenses
The mix of fuel sources for the generation of electricity is determined primarily by demand, the unit cost of fuel consumed, and the availability of generating units. Additionally, the electric utilities purchase a portion of their electricity needs from the wholesale market.
Details of the Southern Company system's generation and purchased power were as follows:
 
2018
 
2017
 
2016
Total generation (in billions of KWHs)
200

 
194

 
188

Total purchased power (in billions of KWHs)
21

 
20

 
19

Sources of generation (percent)  —
 
 
 
 
 
Gas
46

 
46

 
46

Coal
30

 
30

 
33

Nuclear
15

 
16

 
16

Hydro
3

 
2

 
2

Other
6

 
6

 
3

Cost of fuel, generated (in cents per net KWH) (a)  
 
 
 
 
 
Gas
2.89

 
2.79

 
2.48

Coal
2.80

 
2.81

 
3.04

Nuclear
0.80

 
0.79

 
0.81

Average cost of fuel, generated (in cents per net KWH) (a)
2.50

 
2.44

 
2.40

Average cost of purchased power (in cents per net KWH) (b )
5.46

 
5.19

 
4.81

(a)
For 2018, cost of fuel, generated and average cost of fuel, generated excludes a $30 million adjustment associated with a May 2018 Alabama PSC accounting order related to excess deferred income taxes.
(b)
Average cost of purchased power includes fuel purchased by the Southern Company system for tolling agreements where power is generated by the provider.
In 2018 , total fuel and purchased power expenses were $5.6 billion , an increase of $345 million , or 6.6% , as compared to the prior year. The increase was primarily the result of a $178 million increase in the volume of KWHs generated and purchased primarily due to colder weather in the first quarter 2018 and warmer weather in the second and third quarters 2018 compared to the corresponding periods in 2017 and a $137 million increase in the average cost of fuel and purchased power primarily due to higher natural gas prices.
In addition, fuel expense increased $30 million in 2018 as a result of an Alabama PSC accounting order authorizing the amortization of a regulatory liability to offset under recovered fuel costs. See FUTURE EARNINGS POTENTIAL – "Regulatory Matters – Alabama Power – Tax Reform Accounting Order " herein for additional information.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report


In 2017 , total fuel and purchased power expenses were $5.3 billion , an increase of $152 million , or 3.0% , as compared to the prior year. The increase was primarily the result of a $196 million increase in the average cost of fuel and purchased power primarily due to higher natural gas prices, partially offset by a $44 million net decrease in the volume of KWHs generated and purchased.
Fuel and purchased power energy transactions at the traditional electric operating companies are generally offset by fuel revenues and do not have a significant impact on net income. See FUTURE EARNINGS POTENTIAL – " Regulatory Matters Fuel Cost Recovery " herein for additional information. Fuel expenses incurred under Southern Power's PPAs are generally the responsibility of the counterparties and do not significantly impact net income.
Fuel
In 2018 , fuel expense was $4.6 billion , an increase of $237 million , or 5.4% , as compared to the prior year. The increase was primarily due to a 3.6% increase in the average cost of natural gas per KWH generated, a 3.5% increase in the volume of KWHs generated by coal, and a 2.8% increase in the volume of KWHs generated by natural gas.
In 2017 , fuel expense was $4.4 billion , an increase of $39 million , or 0.9% , as compared to the prior year. The increase was primarily due to a 12.5% increase in the average cost of natural gas per KWH generated and a 2.8% increase in the volume of KWHs generated by natural gas, partially offset by a 7.9% decrease in the volume of KWHs generated by coal and a 7.6% decrease in the average cost of coal per KWH generated.
Purchased Power
In 2018 , purchased power expense was $971 million , an increase of $108 million , or 12.5% , as compared to the prior year. The increase was primarily due to a 5.2% increase in the average cost per KWH purchased, primarily as a result of higher natural gas prices, and a 5.2% increase in the volume of KWHs purchased.
In 2017 , purchased power expense was $863 million , an increase of $113 million , or 15.1% , as compared to the prior year. The increase was primarily due to a 7.9% increase in the average cost per KWH purchased, primarily as a result of higher natural gas prices, and a 5.0% increase in the volume of KWHs purchased.
Energy purchases will vary depending on demand for energy within the Southern Company system's electric service territory, the market prices of wholesale energy as compared to the cost of the Southern Company system's generation, and the availability of the Southern Company system's generation.
Other Operations and Maintenance Expenses
Other operations and maintenance expenses increased $45 million , or 1.0% , in 2018 as compared to the prior year. The increase was primarily due to a $74 million increase in transmission and distribution costs, primarily related to additional vegetation management at Georgia Power, and $74 million in expenses from unregulated sales of products and services that were reclassified to other operations and maintenance expenses as a result of the adoption of ASC 606. In prior periods, these expenses were included in other income (expense), net. These increases were partially offset by a $32.5 million charge in the first quarter 2017 related to the write-down of Gulf Power's ownership of Plant Scherer Unit 3 in accordance with a rate case settlement agreement, a $30 million net decrease in employee compensation and benefits, including pension costs, largely due to a decrease in active medical costs at Alabama Power and a 2017 employee attrition plan at Georgia Power, and a $27 million decrease in customer accounts, service, and sales costs primarily due to cost-saving initiatives. See Note 1 to the financial statements for additional information regarding the adoption of ASC 606.
Other operations and maintenance expenses decreased $76 million , or 1.6% , in 2017 as compared to the prior year. The decrease was primarily due to cost containment and modernization activities implemented at Georgia Power that contributed to decreases of $85 million in generation maintenance costs, $46 million in transmission and distribution overhead line maintenance, $22 million in other employee compensation and benefits, and $22 million in customer accounts, service, and sales costs. Additionally, there was a $34 million decrease in scheduled outage and maintenance costs at generation facilities. These decreases were partially offset by a $56 million increase associated with new facilities at Southern Power, a $37 million increase in transmission and distribution costs primarily due to vegetation management at Alabama Power, and $32.5 million resulting from the write-down of Gulf Power's ownership of Plant Scherer Unit 3 in accordance with a rate case settlement agreement.
Production expenses and transmission and distribution expenses fluctuate from year to year due to variations in outage and maintenance schedules and normal changes in the cost of labor and materials.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report


Depreciation and Amortization
Depreciation and amortization increased $108 million , or 4.4% , in 2018 as compared to the prior year. The increase was primarily related to additional plant in service. Additionally, the increase reflects $34 million in depreciation credits recognized in 2017, as authorized in Gulf Power's 2013 rate case settlement.
Depreciation and amortization increased $224 million , or 10.0% , in 2017 as compared to the prior year. The increase reflects $203 million related to additional plant in service at the traditional electric operating companies and Southern Power and a $13 million increase in amortization related to environmental compliance at Mississippi Power. The increase was partially offset by $34 million in depreciation credits recognized in accordance with Gulf Power's 2013 rate case settlement.
See Note 2 to the financial statements under " Southern Company Regulatory Assets and Liabilities " and Note 5 to the financial statements under " Depreciation and Amortization " for additional information.
Taxes Other Than Income Taxes
Taxes other than income taxes increased $35 million , or 3.3% , in 2018 as compared to the prior year primarily due to increased property taxes associated with higher assessed values and an increase in municipal franchise fees primarily related to higher retail revenues at Georgia Power.
Taxes other than income taxes increased $24 million , or 2.3% , in 2017 as compared to the prior year primarily due to an increase in property taxes due to new facilities at Southern Power.
Estimated Loss on Projects Under Construction
In the second quarter 2018, an estimated probable loss of $1.1 billion was recorded to reflect Georgia Power's revised estimate to complete construction and start-up of Plant Vogtle Units 3 and 4, which reflects the increase in costs included in the revised base capital cost forecast for which Georgia Power did not seek rate recovery and costs included in the revised construction contingency estimate for which Georgia Power may seek rate recovery as and when such costs are appropriately included in the base capital cost forecast. See Note 2 to the financial statements under " Georgia Power Nuclear Construction " for additional information.
Charges associated with the Kemper IGCC of $37 million , $3.4 billion , and $428 million were recorded in 2018 , 2017 , and 2016 , respectively. The 2018 pre-tax charge of $37 million primarily resulted from the abandonment and related closure activities and ongoing period costs, net of sales proceeds, for the mine and gasifier-related assets at the Kemper County energy facility. On June 28, 2017, Mississippi Power suspended the gasifier portion of the project and recorded a charge to earnings for the remaining $2.8 billion book value of the gasifier portion of the project. Prior to the suspension, Mississippi Power recorded losses for revisions of estimated costs expected to be incurred on construction of the Kemper IGCC in excess of the $2.88 billion cost cap established by the Mississippi PSC, net of $245 million of grants awarded to the project by the DOE under the Clean Coal Power Initiative Round 2 and excluding the cost of the lignite mine and equipment, the cost of the CO 2 pipeline facilities, AFUDC, and certain general exceptions. See Note 2 to the financial statements under " Mississippi Power Kemper County Energy Facility " for additional information.
Impairment Charges
In the second quarter 2018, Southern Power recorded a $119 million asset impairment charge in contemplation of the sale of Plant Oleander and Plant Stanton Unit A (together, the Florida Plants) and in the third quarter 2018 recorded a $36 million asset impairment charge on wind turbine equipment held for development projects. There were no asset impairment charges recorded in 2017 or 2016. See Note 15 to the financial statements under "Southern Power – Sales of Natural Gas Plants " and " – Development Projects" for additional information.
Gain on Dispositions, Net
Gain on dispositions, net decreased $40 million in 2018 and increased $41 million in 2017 as compared to the prior periods primarily due to gains on sales of assets at Georgia Power recorded in 2017.
Allowance for Equity Funds Used During Construction
AFUDC equity decreased $21 million , or 13.8% , in 2018 as compared to the prior year primarily due to Mississippi Power's suspension of the Kemper IGCC construction in June 2017, partially offset by a higher AFUDC rate resulting from a higher equity ratio and lower short-term borrowings at Georgia Power and a higher AFUDC base related to steam and transmission construction projects at Alabama Power.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report


AFUDC equity decreased $48 million , or 24.0% , in 2017 as compared to the prior year primarily due to Mississippi Power's suspension of the Kemper IGCC in June 2017.
See Note 2 to the financial statements under " Mississippi Power Kemper County Energy Facility " for additional information.
Interest Expense, Net of Amounts Capitalized
Interest expense, net of amounts capitalized increased $24 million , or 2.4% , in 2018 as compared to the prior year. The increase was primarily related to Mississippi Power and reflects a $33 million net reduction in interest recorded in 2017 following a settlement with the IRS related to research and experimental deductions and a $29 million reduction in interest capitalized related to the Kemper IGCC suspension in June 2017. The increase also reflects an increase in outstanding borrowings and higher interest rates at Alabama Power, partially offset by a decrease in outstanding borrowings at Georgia Power. See Note 10 to the financial statements under "Section 174 Research and Experimental Deduction" for additional information.
Interest expense, net of amounts capitalized increased $80 million , or 8.6% , in 2017 as compared to the prior year primarily due to an increase in average outstanding long-term debt, primarily at Southern Power and Georgia Power, and a $37 million decrease in interest capitalized, primarily at Southern Power and Mississippi Power, partially offset by a net reduction of $33 million following Mississippi Power's settlement with the IRS related to research and experimental deductions. See Note 10 to the financial statements under " Unrecognized Tax Benefits " for additional information.
See Note 8 to the financial statements for additional information.
Other Income (Expense), Net
Other income (expense), net increased $17 million , or 13.4% , in 2018 as compared to the prior year primarily due to the settlement of Mississippi Power's Deepwater Horizon claim in May 2018 and a gain from a joint-development wind project at Southern Power, which is attributable to Southern Power's partner in the project and fully offset within noncontrolling interests, partially offset by an increase in charitable donations. See Note 3 to the financial statements under "General Litigation Matters – Mississippi Power" and Note 7 to the financial statements under "Southern Power" for additional information.
Other income (expense), net increased $58 million , or 84.1% , in 2017 as compared to the prior year primarily due to a decrease in non-service cost components of net periodic pension and other postretirement benefits costs, partially offset by increases in charitable donations. The change also includes an increase of $159 million in currency losses arising from a translation of euro-denominated fixed-rate notes into U.S. dollars, fully offset by an equal change in gains on the foreign currency hedges that were reclassified from accumulated OCI into earnings at Southern Power. See Note 1 under " Recently Adopted Accounting Standards " and Note 11 to the financial statements for additional information on net periodic pension and other postretirement benefit costs.
Income Taxes
Income taxes increased $125 million , or 152.4% , in 2018 as compared to the prior year. The increase was primarily due to an increase in pre-tax earnings, primarily resulting from charges recorded in 2017 related to the Kemper IGCC at Mississippi Power, partially offset by the estimated probable loss on Plant Vogtle Units 3 and 4 at Georgia Power recognized in the second quarter 2018. This increase was partially offset by lower federal income tax expense, as well as benefits from the flowback of excess deferred income taxes as a result of the Tax Reform Legislation.
Income taxes decreased $1.0 billion , or 92.5% , in 2017 as compared to the prior year primarily due to $809 million in tax benefits related to estimated losses on the Kemper IGCC at Mississippi Power and $346 million in net tax benefits resulting from the Tax Reform Legislation.
See Note 10 to the financial statements for additional information.
Dividends on Preferred and Preference Stock of Subsidiaries
Dividends on preferred and preference stock of subsidiaries decreased $22 million , or 57.9% , in 2018 as compared to 2017 and decreased $7 million , or 15.6% , in 2017 as compared to 2016 . These decreases were primarily due to the 2017 redemptions of all outstanding shares of preferred and preference stock at Georgia Power and Gulf Power. See Note 8 to the financial statements for additional information.
Net Income Attributable to Noncontrolling Interests
Substantially all noncontrolling interests relate to renewable projects at Southern Power. Net income attributable to noncontrolling interests increased $13 million , or 28.3% , in 2018 , as compared to the prior year. The increase was primarily due to $20 million of net income allocations due to the sale of a noncontrolling 33% equity interest in SP Solar in 2018 and $14

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Southern Company and Subsidiary Companies 2018 Annual Report


million of other income allocations attributable to a joint-development wind project, partially offset by a reduction of $19 million due to HLBV income allocations between Southern Power and tax equity partners for partnerships entered into during 2018. In 2017, noncontrolling interests increased $10 million, or 28%, compared to 2016 primarily due to additional net income allocations from new solar partnerships.
See Note 15 under " Southern Power " for additional information.
Gas Business
Southern Company Gas distributes natural gas through utilities in four states and is involved in several other complementary businesses including gas pipeline investments, wholesale gas services, and gas marketing services.
A condensed statement of income for the gas business follows:
 
Amount
 
Increase (Decrease)
from Prior Year
 
2018
 
2018
 
2017
 
(in millions)
Operating revenues
$
3,909

 
$
(11
)
 
$
2,268

Cost of natural gas
1,539

 
(62
)
 
988

Cost of other sales
12

 
(17
)
 
19

Other operations and maintenance
981

 
36

 
424

Depreciation and amortization
500

 
(1
)
 
263

Taxes other than income taxes
211

 
27

 
113

Impairment charges
42

 
42

 

Gain on dispositions, net
(291
)
 
(291
)
 

Total operating expenses
2,994

 
(266
)
 
1,807

Operating income
915

 
255

 
461

Earnings from equity method investments
148

 
42

 
46

Interest expense, net of amounts capitalized
228

 
28

 
119

Other income (expense), net
1

 
(43
)
 
32

Income taxes
464

 
97

 
291

Net income
$
372

 
$
129

 
$
129

In the table above, the 2018 changes for Southern Company Gas reflect the year ended December 31, 2018 compared to 2017. The Southern Company Gas Dispositions were completed by July 29, 2018 and represent the primary variance driver for the 2018 changes. Additional detailed variance explanations are provided herein. The 2017 changes reflect the 12-month period in 2017 compared to the six-month period following the Merger closing on July 1, 2016, which is the primary variance driver. Additionally, earnings from equity method investments include Southern Company Gas' acquisition of a 50% equity interest in SNG completed in September 2016. See Note 15 to the financial statements under "Southern Company Gas" for additional information on Southern Company Gas' investment in SNG and the Southern Company Gas Dispositions.
Seasonality of Results
During the period from November through March when natural gas usage and operating revenues are generally higher (Heating Season), more customers are connected to Southern Company Gas' distribution systems, and natural gas usage is higher in periods of colder weather. Occasionally in the summer, operating revenues are impacted due to peak usage by power generators in response to summer energy demands. Southern Company Gas' base operating expenses, excluding cost of natural gas, bad debt expense, and certain incentive compensation costs, are incurred relatively equally over any given year. Thus, operating results can vary significantly from quarter to quarter as a result of seasonality. For 2018 , the percentage of operating revenues and net income generated during the Heating Season (January through March and November through December) were 68.7% and 96.0% , respectively. For 2017 , the percentage of operating revenues and net income generated during the Heating Season were 67.3% and 73.7% , respectively. The 2017 net income generated during the Heating Season was significantly impacted by additional tax expense recorded in the fourth quarter resulting from the Tax Reform Legislation. See FUTURE EARNINGS POTENTIAL – " Income Tax Matters Federal Tax Reform Legislation " herein for additional information.

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Southern Company and Subsidiary Companies 2018 Annual Report


Operating Revenues
Operating revenues in 2018 were $3.9 billion , reflecting an $11 million decrease from 2017. Details of operating revenues were as follows:
 
(in millions)
 
(% change)
Operating revenues – prior year
$
3,920

 
 
Estimated change resulting from –
 
 
 
Infrastructure replacement programs and base rate changes
31

 
0.8

Gas costs and other cost recovery
3

 
0.1

Weather
13

 
0.3

Wholesale gas services
138

 
3.5

Southern Company Gas Dispositions (*)
(228
)
 
(5.8
)
Other
32

 
0.8

Operating revenues – current year
$
3,909

 
(0.3
)%
(*)
Includes a $154 million decrease related to natural gas revenues, including alternative revenue programs, and a $74 million decrease related to other revenues. See Note 15 to the financial statements under "Southern Company Gas" for additional information.
Revenues from infrastructure replacement programs and base rate changes increased in 2018 primarily due to a $48 million increase at Nicor Gas, partially offset by a $12 million decrease at Atlanta Gas Light. These amounts include the natural gas distribution utilities' continued investments recovered through infrastructure replacement programs and base rate increases less revenue reductions for the impacts of the Tax Reform Legislation. See Note 2 to the financial statements under " Southern Company Gas " for additional information.
Revenues increased due to colder weather, as determined by Heating Degree Days, in 2018 compared to 2017 .
Revenues from wholesale gas services increased in 2018 primarily due to increased commercial activity, partially offset by derivative losses.
Other revenues increased in 2018 primarily due to a $15 million increase from the Dalton Pipeline being placed in service in August 2017 and a $14 million increase in Nicor Gas' revenue taxes.
Natural gas distribution rates include provisions to adjust billings for fluctuations in natural gas costs. Therefore, gas costs recovered through natural gas revenues generally equal the amount expensed in cost of natural gas and do not affect net income from the natural gas distribution utilities.
Cost of Natural Gas
Excluding Atlanta Gas Light, which does not sell natural gas to end-use customers, the natural gas distribution utilities charge their utility customers for natural gas consumed using natural gas cost recovery mechanisms set by the applicable state regulatory agencies. Under these mechanisms, all prudently-incurred natural gas costs are passed through to customers without markup, subject to regulatory review. The natural gas distribution utilities defer or accrue the difference between the actual cost of natural gas and the amount of commodity revenue earned in a given period. The deferred or accrued amount is either billed or refunded to customers prospectively through adjustments to the commodity rate. Deferred natural gas costs are reflected as regulatory assets and accrued natural gas costs are reflected as regulatory liabilities. Therefore, gas costs recovered through natural gas revenues generally equal the amount expensed in cost of natural gas and do not affect net income from the natural gas distribution utilities. Cost of natural gas at the natural gas distribution utilities represented 83.2% of the total cost of natural gas for 2018 .
Gas marketing services customers are charged for actual and estimated natural gas consumed. Cost of natural gas includes the cost of fuel and associated transportation costs, lost and unaccounted for gas, adjustments to reduce the value of inventories to market value, if applicable, and gains and losses associated with certain derivatives.
Cost of natural gas in 2018 was $1.5 billion , a decrease of $62 million , or 3.9% , compared to 2017 , which was substantially all as a result of the Southern Company Gas Dispositions.

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Southern Company and Subsidiary Companies 2018 Annual Report


Cost of Other Sales
Cost of other sales in 2018 was $12 million , a decrease of $17 million , or 58.6% , compared to 2017 primarily related to the disposition of Pivotal Home Solutions.
Other Operations and Maintenance Expenses
Other operations and maintenance expenses increase d $36 million , or 3.8% , in 2018 compared to the prior year. Excluding a $39 million decrease related to the Southern Company Gas Dispositions, other operations and maintenance expenses increased $75 million. This increase was primarily due to a $53 million increase in compensation and benefit costs, including a $12 million one-time increase for the adoption of a new paid time off policy to align with the Southern Company system, a $28 million increase in disposition-related costs, and an $11 million expense for a litigation settlement to facilitate the sale of Pivotal Home Solutions. These increases were partially offset by a $27 million decrease in bad debt expense primarily at Nicor Gas, which was offset by a decrease in revenues as a result of the related regulatory recovery mechanism. See Note 3 to the financial statements under " General Litigation Matters – Southern Company Gas" for additional information on the litigation settlement.
Depreciation and Amortization
Depreciation and amortization decrease d $1 million , or 0.2% , in 2018 compared to the prior year. Excluding a $37 million decrease related to the Southern Company Gas Dispositions, depreciation and amortization increased $36 million. The increase was primarily due to continued infrastructure investments at the natural gas distribution utilities, partially offset by lower amortization of intangible assets as a result of fair value adjustments in acquisition accounting at gas marketing services. See Note 2 to the financial statements under " Southern Company Gas " for additional information on infrastructure replacement programs.
Taxes Other Than Income Taxes
Taxes other than income taxes increase d $27 million , or 14.7% , in 2018 compared to the prior year. Excluding a $4 million decrease related to the Southern Company Gas Dispositions, taxes other than income taxes increased $31 million. This increase primarily reflects a $13 million increase in revenue tax expenses as a result of higher natural gas revenues, a $12 million increase in Nicor Gas' invested capital tax that reflects a $7 million credit in 2017 to establish a related regulatory asset, and a $4 million increase in property taxes. See Note 15 to the financial statements under " Southern Company Gas " for additional information on the Southern Company Gas Dispositions.
Impairment Charges
A goodwill impairment charge of $ 42 million was r ecorded in 2018 in contemplation of the sale of Pivotal Home Solutions. See Notes 1 and 15 to the financial statements under " Goodwill and Other Intangible Assets and Liabilities " and " Southern Company Gas Sale of Pivotal Home Solutions ," respectively, for additional information.
Gain on Dispositions, Net
Gain on dispositions, net was $ 291 million in 2018 and was associated with the Southern Company Gas Dispositions. The income tax expense on these gains included income tax expense on goodwill not deductible for tax purposes and for which a deferred tax liability had not been recorded previously.
Earnings from Equity Method Investments
Earnings from equity method investments increase d $42 million , or 39.6% , in 2018 compared to the prior year. The increase was primarily due to higher earnings from Southern Company Gas' equity method investment in SNG from new rates effective September 2018 and lower operations and maintenance expenses due to the timing of pipeline maintenance. See Note 7 to the financial statements under " Southern Company Gas Equity Method Investments " for additional information.
Interest Expense, Net of Amounts Capitalized
Interest expense, net of amounts capitalized increase d $28 million , or 14.0% , in 2018 compared to the prior year. The increase was primarily due to $21 million of additional interest expense related to new debt issuances and a $4 million reduction in capitalized interest primarily due to the Dalton Pipeline being placed in service in August 2017.
Other Income (Expense), Net
Other income (expense), net decrease d $43 million , or 97.7% , in 2018 compared to the prior year. Excluding a $3 million decrease related to the Southern Company Gas Dispositions, other income (expense), net decreased $40 million. This decrease

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Southern Company and Subsidiary Companies 2018 Annual Report


was primarily due to a $23 million increase in charitable donations and a $13 million decrease in gains from the settlement of contractor litigation claims. See Note 2 to the financial statements under " Southern Company Gas Infrastructure Replacement Programs and Capital Projects – PRP" for additional information on the contractor litigation settlement.
Income Taxes
Income taxes increase d $97 million , or 26.4% , in 2018 compared to the prior year. Excluding a $329 million increase related to the Southern Company Gas Dispositions, including tax expense on the goodwill for which a deferred tax liability had not been previously provided, income taxes decreased $232 million. This decrease was primarily due to a lower federal income tax rate and the flowback of excess deferred taxes as a result of the Tax Reform Legislation. In addition, 2017 included additional tax expense of $130 million from the revaluation of deferred tax assets associated with the Tax Reform Legislation, the enactment of the State of Illinois income tax legislation, and new income tax apportionment factors in several states. See Note 10 to the financial statements for additional information.
Other Business Activities
Southern Company's other business activities primarily include the parent company (which does not allocate operating expenses to business units); PowerSecure, which was acquired on May 9, 2016 and is a provider of energy solutions, including distributed infrastructure, energy efficiency products and services, and utility infrastructure services, to customers; Southern Company Holdings, Inc. (Southern Holdings), which invests in various projects, including leveraged lease projects; and Southern Linc, which provides digital wireless communications for use by Southern Company and its subsidiary companies and also markets these services to the public and provides fiber optics services within the Southeast.
A condensed statement of income for Southern Company's other business activities follows:
 
Amount
 
Increase (Decrease)
from Prior Year
 
2018
 
2018
 
2017
 
(in millions)
Operating revenues
$
1,015

 
$
444

 
$
268

Cost of other sales
728

 
313

 
223

Other operations and maintenance
273

 
69

 
9

Depreciation and amortization
66

 
14

 
21

Taxes other than income taxes
6

 
3

 

Impairment charges
12

 
12

 

Total operating expenses
1,085

 
411

 
253

Operating income (loss)
(70
)
 
33

 
15

Interest expense
579

 
96

 
178

Other income (expense), net
(23
)
 
(23
)
 
30

Income taxes (benefit)
(222
)
 
85

 
(91
)
Net income (loss)
$
(450
)
 
$
(171
)
 
$
(42
)
In the table above, the 2018 changes for these other business activities reflect the inclusion of PowerSecure for the year ended December 31, 2018 compared to 2017. The 2017 changes reflect the inclusion of PowerSecure for the 12-month period in 2017 compared to the eight-month period following the acquisition on May 9, 2016, which is the primary variance driver. Additional detailed variance explanations are provided herein. See Note 15 to the financial statements under " Southern Company Acquisition of PowerSecure " for additional information.
Operating Revenues
Southern Company's operating revenues for these other business activities increased $444 million , or 77.8% , in 2018 as compared to the prior year. The increase was primarily related to PowerSecure's storm restoration services in Puerto Rico.
Cost of Other Sales
Cost of other sales for these other business activities increased $313 million , or 75.4% in 2018 . The increase was primarily related to PowerSecure's storm restoration services in Puerto Rico.

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Southern Company and Subsidiary Companies 2018 Annual Report


Other Operations and Maintenance Expenses
Other operations and maintenance expenses for these other business activities increased $69 million , or 33.8% , in 2018 as compared to the prior year. The increase was primarily due to PowerSecure's storm restoration services in Puerto Rico and parent company expenses related to the sale of Gulf Power. Other operations and maintenance expenses for these other business activities increased $9 million , or 4.6% , in 2017 as compared to the prior year. The increase was primarily due to a $44 million increase as a result of the inclusion of PowerSecure results for the 12-month period in 2017 compared to eight months in 2016, partially offset by a $35 million decrease in parent company expenses related to the Merger and the acquisition of PowerSecure.
Impairment Charges
Impairment charges for these other business activities were $12 million in 2018. These charges were associated with Southern Linc's tower leases and were recorded in contemplation of the sale of Gulf Power.
Interest Expense
Interest expense for these other business activities increased $96 million , or 19.9% , in 2018 as compared to the prior year primarily due to an increase in variable interest rates and average outstanding debt at the parent company. Interest expense for these other business activities increased $178 million , or 58.4% , in 2017 as compared to the prior year primarily due to an increase in average outstanding long-term debt at the parent company. See Note 8 to the financial statements for additional information.
Other Income (Expense), Net
Other income (expense), net for these other business activities decreased $23 million in 2018 as compared to the prior year primarily due to charitable donations, partially offset by leveraged lease income at Southern Holdings. See Note 1 to the financial statements for additional information. Other income (expense), net for these other business activities increased $30 million in 2017 as compared to the prior year primarily due to expenses associated with bridge financing for the Merger in 2016.
Income Taxes (Benefit)
The income tax benefit for these other business activities decreased $85 million , or 27.7% , in 2018 as compared to the prior year primarily as a result of the Tax Reform Legislation, partially offset by an increase in pre-tax losses at the parent company. The income tax benefit for these other business activities increased $91 million , or 42.1% , in 2017 as compared to the prior year primarily as a result of pre-tax earnings (losses) and net tax benefits related to the Tax Reform Legislation. See FUTURE EARNINGS POTENTIAL – " Income Tax Matters Federal Tax Reform Legislation " herein and Note 10 to the financial statements for additional information.
Effects of Inflation
The electric operating companies and natural gas distribution utilities are subject to rate regulation that is generally based on the recovery of historical and projected costs. The effects of inflation can create an economic loss since the recovery of costs could be in dollars that have less purchasing power. Southern Power is party to long-term contracts reflecting market-based rates, including inflation expectations. Any adverse effect of inflation on Southern Company's results of operations has not been substantial in recent years.
FUTURE EARNINGS POTENTIAL
General
The traditional electric operating companies operate as vertically integrated utilities providing electric service to customers within their service territories in the Southeast. On January 1, 2019, Southern Company completed the sale of Gulf Power, one of the traditional electric operating companies, to NextEra Energy. The natural gas distribution utilities provide service to customers in their service territories in Illinois, Georgia, Virginia, and Tennessee. In July 2018, Southern Company Gas completed sales of three of its natural gas distribution utilities. Prices for electricity provided and natural gas distributed to retail customers are set by state PSCs or other applicable state regulatory agencies under cost-based regulatory principles. Retail rates and earnings are reviewed and may be adjusted periodically within certain limitations. Prices for wholesale electricity sales and natural gas distribution, interconnecting transmission lines, and the exchange of electric power are regulated by the FERC. Southern Power continues to focus on long-term PPAs. In 2018, Southern Power completed sales of noncontrolling interests in entities indirectly owning substantially all of its solar facilities and eight of its wind facilities and also completed sales and entered into an agreement to sell certain of its natural gas plants. See ACCOUNTING POLICIES – " Application of Critical Accounting Policies

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Southern Company and Subsidiary Companies 2018 Annual Report


and Estimates Utility Regulation " herein and Note 2 to the financial statements for additional information about regulatory matters.
The results of operations for the past three years are not necessarily indicative of Southern Company's future earnings potential. Future earnings will be impacted by the 2018 disposition activities described herein and in Note 15 to the financial statements. The level of Southern Company's future earnings depends on numerous factors that affect the opportunities, challenges, and risks of the Southern Company system's primary businesses of selling electricity and distributing natural gas. These factors include the traditional electric operating companies' and the natural gas distribution utilities' ability to maintain constructive regulatory environments that allow for the timely recovery of prudently-incurred costs during a time of increasing costs, continued customer growth, and, for the traditional electric operating companies, the weak pace of growth in electricity use per customer, especially in residential and commercial markets. Plant Vogtle Units 3 and 4 construction and rate recovery and the profitability of Southern Power's competitive wholesale business are also major factors.
Earnings in the electricity business will also depend upon maintaining and growing sales, considering, among other things, the adoption and/or penetration rates of increasingly energy-efficient technologies, increasing volumes of electronic commerce transactions, and more multi-family home construction, all of which could contribute to a net reduction in customer usage. Earnings for both the electricity and natural gas businesses are subject to a variety of other factors. These factors include weather, competition, new energy contracts with other utilities and other wholesale customers, energy conservation practiced by customers, the use of alternative energy sources by customers, the prices of electricity and natural gas, the price elasticity of demand, and the rate of economic growth or decline in the service territory. In addition, the level of future earnings for the wholesale electric business also depends on numerous factors including regulatory matters, creditworthiness of customers, total electric generating capacity available and related costs, the development or acquisition of renewable facilities and other energy projects, and the successful remarketing of capacity as current contracts expire. Demand for electricity and natural gas is primarily driven by the pace of economic growth that may be affected by changes in regional and global economic conditions, which may impact future earnings. In addition, the volatility of natural gas prices has a significant impact on the natural gas distribution utilities' customer rates, long-term competitive position against other energy sources, and the ability of Southern Company Gas' gas marketing services and wholesale gas services businesses to capture value from locational and seasonal spreads. Additionally, changes in commodity prices subject a significant portion of Southern Company Gas' operations to earnings variability.
As part of its ongoing effort to adapt to changing market conditions, Southern Company continues to evaluate and consider a wide array of potential business strategies. These strategies may include business combinations, partnerships, and acquisitions involving other utility or non-utility businesses or properties, disposition of certain assets or businesses, internal restructuring, or some combination thereof. Furthermore, Southern Company may engage in new business ventures that arise from competitive and regulatory changes in the utility industry. Pursuit of any of the above strategies, or any combination thereof, may significantly affect the business operations, risks, and financial condition of Southern Company.
On January 1, 2019, Southern Company completed the sale of Gulf Power to NextEra Energy for an aggregate cash purchase price of approximately $5.8 billion (less $1.3 billion of indebtedness assumed), subject to customary working capital adjustments. In 2018, net income attributable to Gulf Power was $160 million.
On June 4, 2018, Southern Company Gas completed the stock sale of Pivotal Home Solutions to American Water Enterprises LLC for a total cash purchase price of $365 million. On July 1, 2018, a Southern Company Gas subsidiary, Pivotal Utility Holdings, completed the sales of the assets of two of its natural gas distribution utilities, Elizabethtown Gas and Elkton Gas, to South Jersey Industries, Inc. for a total cash purchase price of $1.7 billion. On July 29, 2018, Southern Company Gas and its wholly-owned direct subsidiary, NUI Corporation, completed the stock sale of Pivotal Utility Holdings, which primarily consisted of Florida City Gas, to NextEra Energy for a total cash purchase price of $587 million. The total cash purchase price for each transaction includes final working capital and other adjustments.
The Southern Company Gas Dispositions resulted in a net loss of $51 million, which includes $342 million of tax expense. The after-tax impacts of these dispositions included income tax expense on goodwill not deductible for tax purposes and for which a deferred tax liability had not been recorded previously. In addition, a goodwill impairment charge of $42 million was recorded during 2018 in contemplation of the sale of Pivotal Home Solutions.
On May 22, 2018, Southern Power sold a noncontrolling 33% equity interest in SP Solar, a limited partnership indirectly owning substantially all of Southern Power's solar facilities, for approximately $1.2 billion and, on December 11, 2018, sold a noncontrolling tax equity interest in SP Wind, a holding company owning a portfolio of eight operating wind facilities, for approximately $1.2 billion. Additionally, on November 5, 2018, Southern Power entered into an agreement to sell all of its equity interests in Plant Mankato (including the 385-MW expansion currently under construction) for an aggregate purchase price of approximately $650 million. The completion of the disposition is subject to the expansion unit reaching commercial operation as well as various other customary conditions to closing, including FERC and state commission approvals, and the sale is expected

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Southern Company and Subsidiary Companies 2018 Annual Report


to close mid-2019. The ultimate outcome of this matter cannot be determined at this time. On December 4, 2018, Southern Power sold of all of its equity interests in the Florida Plants to NextEra Energy for approximately $203 million.
See Note 15 to the financial statements for additional information regarding disposition activities.
Environmental Matters
The Southern Company system's operations are regulated by state and federal environmental agencies through a variety of laws and regulations governing air, water, land, and protection of other natural resources. The Southern Company system maintains comprehensive environmental compliance and GHG strategies to assess upcoming requirements and compliance costs associated with these environmental laws and regulations. The costs, including capital expenditures, operations and maintenance costs, and costs reflected in ARO liabilities, required to comply with environmental laws and regulations and to achieve stated goals may impact future electric generating unit retirement and replacement decisions, results of operations, cash flows, and/or financial condition. Related costs may result from the installation of additional environmental controls, closure and monitoring of CCR facilities, unit retirements, or changing fuel sources for certain existing units, as well as related upgrades to the Southern Company system's transmission and distribution (electric and natural gas) systems. A major portion of these costs is expected to be recovered through retail and wholesale rates. The ultimate impact of environmental laws and regulations and the GHG goals discussed herein will depend on various factors, such as state adoption and implementation of requirements, the availability and cost of any deployed technology, fuel prices, and the outcome of pending and/or future legal challenges.
New or revised environmental laws and regulations could affect many areas of the traditional electric operating companies', Southern Power's, and the natural gas distribution utilities' operations. The impact of any such changes cannot be determined at this time. Environmental compliance costs could affect earnings if such costs cannot continue to be recovered in rates on a timely basis for the traditional electric operating companies and the natural gas distribution utilities or through long-term wholesale agreements for the traditional electric operating companies and Southern Power . Further, increased costs that are recovered through regulated rates could contribute to reduced demand for electricity and natural gas , which could negatively affect results of operations, cash flows, and/or financial condition. Additionally, many commercial and industrial customers may also be affected by existing and future environmental requirements, which for some may have the potential to ultimately affect their demand for electricity and natural gas .
The Southern Company system's commitment to the environment has been demonstrated in many ways, including participating in partnerships resulting in approximately $140 million of funding that has restored or enhanced more than 2 million acres of habitat since 2003; the removal of more than 15.5 million pounds of trash and debris from waterways between 2000 and 2018 through the Renew Our Rivers program; a 21.2% reduction in surface water withdrawal from 2015 to 2017; reductions in SO 2 and NO X air emissions of 98% and 89%, respectively, from 1990 to 2017; the reduction of mercury air emissions of over 95% from 2005 to 2017; and the Southern Company system's changing energy mix.
Through 2018 , the traditional electric operating companies have invested approximately $14.2 billion in environmental capital retrofit projects to comply with environmental requirements, with annual totals of approximately $1.3 billion, $0.9 billion, and $0.5 billion for 2018 , 2017 , and 2016 , respectively. Although the timing, requirements, and estimated costs could change as environmental laws and regulations are adopted or modified, as compliance plans are revised or updated, and as legal challenges to rules are initiated or completed, the Southern Company system's current compliance strategy estimates capital expenditures of $1.4 billion from 2019 through 2023 , with annual totals of approximately $0.5 billion , $0.2 billion , $0.3 billion , $0.3 billion , and $0.2 billion for 2019 , 2020 , 2021 , 2022 , and 2023 , respectively. These estimates do not include any potential compliance costs associated with pending regulation of CO 2 emissions from fossil fuel-fired electric generating units. See " Global Climate Issues " herein for additional information. The Southern Company system also anticipates substantial expenditures associated with ash pond closure and ground water monitoring under the CCR Rule, which are reflected in Southern Company's ARO liabilities. See FINANCIAL CONDITION AND LIQUIDITY – " Capital Requirements and Contractual Obligations " herein and Note 6 to the financial statements for additional information.
Environmental Laws and Regulations
Air Quality
The EPA has set National Ambient Air Quality Standards (NAAQS) for six air pollutants (carbon monoxide, lead, nitrogen dioxide, ozone, particulate matter, and SO 2 ) to protect and improve the nation's air quality, which it reviews and revises periodically. Following a NAAQS revision, states are required to develop an EPA-approved plan to protect air quality. These state plans can require additional emission controls, improvements in control efficiency, or fuel changes which can result in increased compliance and operational costs. NAAQS requirements can also adversely affect the siting of new electric generating facilities. All areas within the Southern Company system's electric service territory have been designated as attainment for all NAAQS

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Southern Company and Subsidiary Companies 2018 Annual Report


except for a seven-county area within metropolitan Atlanta that is not in attainment with the 2015 ozone NAAQS and the area surrounding Plant Hammond , in Georgia , which will not be designated attainment or nonattainment for the 2010 SO 2 standard until December 2020 . If areas are designated as nonattainment in the future, increased compliance costs could result. See "Regulatory Matters – Georgia Power – Integrated Resource Plan" herein for information regarding Georgia Power's request to decertify and retire Plant Hammond.
In 2011, the EPA finalized the Cross-State Air Pollution Rule (CSAPR) to address impacts of SO 2 and NO X emissions from fossil fuel-fired electric generating plants. CSAPR establishes emissions trading programs and budgets for certain states and allocates emissions allowances for sources in those states. In 2016, the EPA published a final rule establishing more stringent ozone season NO X emissions budgets in Alabama , Mississippi , and Texas . Georgia's ozone season NO X emissions budget remained unchanged. The EPA also removed North Carolina from this particular CSAPR program. The outcome of ongoing CSAPR litigation concerning the 2016 CSAPR rule, to which Mississippi Power is a party, could have an impact on the State of Mississippi's ozone season NO X emissions budget. Increases in either future fossil fuel-fired generation or the availability or cost of CSAPR allowances could have a negative financial impact on results of operations for Southern Company .
The EPA finalized regional haze regulations in 2005 and 2017. These regulations require states, tribal governments, and various federal agencies to develop and implement plans to reduce pollutants that impair visibility and demonstrate reasonable progress toward the goal of restoring natural visibility conditions in certain areas, including national parks and wilderness areas. States must submit a revised state implementation plan (SIP) to the EPA demonstrating continued reasonable progress towards achieving visibility improvement goals. These plans could require reductions in certain pollutants, such as particulate matter, SO 2 , and NO X , which could result in increased compliance costs. The EPA approved the regional progress SIPs for the States of Alabama and Georgia, but only issued a limited approval of the regional progress SIP for the State of Mississippi because Mississippi must revise the best available retrofit technology (BART) provisions of its SIP. Therefore, Mississippi Power's Plant Daniel is the only electric generating unit in the Southern Company system that continues to be evaluated under the regional haze BART provisions. Mississippi Power is required to submit Plant Daniel's BART analysis to the State of Mississippi by summer 2019. Requirements for further reduction of these pollutants at Plant Daniel could increase compliance costs.
Water Quality
In 2014, the EPA finalized requirements under Section 316(b) of the Clean Water Act (CWA) to regulate cooling water intake structures (CWIS) to minimize their effects on fish and other aquatic life at existing power plants (e.g. coal, natural gas, oil, and nuclear generating plants) and manufacturing facilities. The regulation requires plant-specific studies to determine applicable CWIS changes to protect organisms that either get caught on the intake screens (impingement) or are drawn into the cooling system (entrainment). The Southern Company system is conducting these studies and currently anticipates applicable CWIS changes may include fish-friendly CWIS screens with fish return systems and minor additions of monitoring equipment at certain plants. However, the ultimate impact of this rule will depend on the outcome of these plant-specific studies, any additional protective measures required to be incorporated into each plant's National Pollutant Discharge Elimination System (NPDES) permit based on site-specific factors, and the outcome of any legal challenges.
In 2015, the EPA finalized the steam electric effluent limitations guidelines (ELG) rule (2015 ELG Rule) that set national standards for wastewater discharges from new and existing steam electric generating units generating greater than 50 MWs. The 2015 ELG Rule prohibits effluent discharges of certain waste streams and imposes stringent limits on flue gas desulfurization (scrubber) wastewater discharges. The revised technology-based limits and the CCR Rule require extensive changes to existing ash and wastewater management systems or the installation and operation of new ash and wastewater management systems. Compliance with the 2015 ELG Rule is expected to require capital expenditures and increased operational costs primarily for the traditional electric operating companies' coal-fired electric generation. State environmental agencies will incorporate specific compliance applicability dates in the NPDES permitting process for each ELG waste stream no later than December 31, 2023. The EPA is scheduled to issue a new rulemaking by December 2019 that could revise the limitations and applicability dates of two of the waste streams regulated in the 2015 ELG Rule. The impact of any changes to the 2015 ELG Rule will depend on the content of the new rule and the outcome of any legal challenges.
In 2015, the EPA and the U.S. Army Corps of Engineers (Corps) jointly published a final rule that revised the regulatory definition of waters of the United States (WOTUS) for all CWA programs. The rule significantly expanded the scope of federal jurisdiction over waterbodies (such as rivers, streams, canals, and wastewater treatment ponds), which could impact new generation projects and permitting and reporting requirements associated with the installation, expansion, and maintenance of transmission , distribution, and pipeline projects. The EPA and the Corps are expected to publish a final rule in 2019 to replace the 2015 WOTUS definition. The impact of any changes to the 2015 WOTUS rule will depend on the content of this final rule and the outcome of any legal challenges.

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Coal Combustion Residuals
In 2015, the EPA finalized non-hazardous solid waste regulations for the disposal of CCR, including coal ash and gypsum, in landfills and surface impoundments (ash ponds) at active generating power plants. In addition to the EPA's CCR Rule, the States of Alabama and Georgia have also finalized regulations regarding the handling of CCR within their respective states. The EPA's CCR Rule requires landfills and ash ponds to be evaluated against a set of performance criteria and potentially closed if minimum criteria are not met. Closure of existing landfills and ash ponds could require installation of equipment and infrastructure to manage CCR in accordance with the CCR Rule. Based on cost estimates for closure and monitoring of landfills and ash ponds pursuant to the CCR Rule, the Southern Company system recorded AROs for each CCR unit in 2015. As further analysis was performed and closure details were developed, the traditional electric operating companies have continued to periodically update these cost estimates, as discussed further below.
The EPA published certain amendments to the CCR Rule, which became effective August 29, 2018. These amendments extend the date from April 2019 to October 31, 2020 to cease sending CCR and other waste streams to ash ponds that demonstrate compliance with all except two of the specified performance criteria.
On August 21, 2018, the U.S. Court of Appeals for the District of Columbia Circuit issued a decision suggesting the EPA should regulate previously-excluded inactive ash ponds located at retired generation facilities and questioning both the ability of unlined ash ponds to continue operating no matter the performance criteria results and the classification of clay-lined landfills and ash ponds. These developments could impact the expected timing of the traditional electric operating companies' landfill and ash pond closure activities, but the extent of any impact will depend on the outcome of ongoing litigation, anticipated EPA rulemaking action to establish further guidance, and the outcome of any legal challenges.
In June 2018, Alabama Power recorded an increase of approximately $1.2 billion to its AROs related to the CCR Rule. The revised cost estimates were based on information from feasibility studies performed on ash ponds in use at plants operated by Alabama Power , including at a plant jointly-owned by Mississippi Power. During the second quarter 2018, Alabama Power's management completed its analysis of these studies which indicated that additional closure costs, primarily related to increases in estimated ash volume, water management requirements, and design revisions, will be required to close these ash ponds under the planned closure-in-place methodology. As the level of work becomes more defined in the next 12 months, it is likely that these cost estimates will change and the change could be material.
In December 2018, Georgia Power recorded an increase of approximately $3.1 billion to its AROs related to the CCR Rule and the related state rule. During the second half of 2018, Georgia Power completed a strategic assessment related to its plans to close the ash ponds at all of its generating plants in compliance with the CCR Rule and the related state rule. This assessment included engineering and constructability studies related to design assumptions for ash pond closures and advanced engineering methods. The results indicated that additional closure costs will be required to close these ash ponds, primarily due to changes in closure strategies, the estimated amount of ash to be excavated, and additional water management requirements necessary to support closure strategies. These factors also impact the estimated timing of future cash outlays.
The traditional electric operating companies expect to periodically update their ARO cost estimates. Absent continued recovery of ARO costs through regulated rates, Southern Company's results of operations, cash flows, and financial condition could be materially impacted. See FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements and Contractual Obligations" herein and Note 6 to the financial statements for additional information.
The ultimate outcome of these matters cannot be determined at this time.
Nuclear Decommissioning
In June 2018, Alabama Power completed an updated decommissioning cost site study for Plant Farley. The estimated cost of decommissioning based on the study resulted in an increase in Alabama Power's ARO liability of approximately $300 million. Amounts previously contributed to Alabama Power's external trust funds are currently projected to be adequate to meet the updated decommissioning obligations.
In December 2018, Georgia Power completed updated decommissioning cost site studies for Plant Hatch and Plant Vogtle Units 1 and 2. The estimated cost of decommissioning based on the studies resulted in an increase in Georgia Power's ARO liability of approximately $130 million. Georgia Power currently collects $4 million and $2 million annually in rates, which is used to fund external nuclear decommissioning trusts for Plant Hatch and Plant Vogtle Units 1 and 2, respectively. Georgia Power expects the Georgia PSC to review and adjust, if necessary, these amounts in the Georgia Power 2019 Base Rate Case.
See Note 6 to the financial statements for additional information.

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Environmental Remediation
The Southern Company system must comply with environmental laws and regulations governing the handling and disposal of waste and releases of hazardous substances. Under these various laws and regulations, the Southern Company system could incur substantial costs to clean up affected sites. The traditional electric operating companies and the natural gas distribution utilities conduct studies to determine the extent of any required cleanup and Southern Company has recognized the estimated costs to clean up known impacted sites in its financial statements. Amounts for cleanup and ongoing monitoring costs were not material for any year presented. The traditional electric operating companies and the natural gas distribution utilities in Illinois and Georgia have all received authority from their respective state PSCs or other applicable state regulatory agencies to recover approved environmental compliance costs through regulatory mechanisms. These regulatory mechanisms are adjusted annually or as necessary within limits approved by the state PSCs or other applicable state regulatory agencies. The traditional electric operating companies and Southern Company Gas may be liable for some or all required cleanup costs for additional sites that may require environmental remediation. See Note 3 to the financial statements under " Environmental Remediation " for additional information.
Global Climate Issues
On August 31, 2018, the EPA published a proposed rule known as the Affordable Clean Energy (ACE) Rule, which is intended to replace a regulation enacted in 2015 known as the Clean Power Plan (CPP), that would limit CO 2 emissions from existing fossil fuel-fired electric generating units. The CPP has been stayed by the U.S. Supreme Court since 2016. The ACE Rule would require states to develop GHG unit-specific emission rate standards based on heat-rate efficiency improvements for existing fossil fuel-fired steam units. As proposed, combustion turbines, including natural gas combined cycles, are not affected sources. As of January 1, 2019, the Southern Company system has ownership interests in 40 fossil fuel-fired steam units to which the proposed ACE Rule is applicable. The ultimate impact of this rule to the Southern Company system is currently unknown and will depend on changes between the proposal and the final rule, subsequent state plan developments and requirements, and any associated legal challenges.
On December 20, 2018, the EPA published a proposed review of the Standards of Performance for Greenhouse Gas Emissions from New, Modified, and Reconstructed Stationary Sources: Electric Utility Generating Units final rule (2015 NSPS rule). The EPA's final 2015 NSPS rule set standards of performance for new, modified, and reconstructed electric utility generating units which included stationary combustion turbines and fossil-fired steam boilers. This proposal reduces the stringency of the 2015 NSPS rule by not basing the new and reconstructed fossil-fired steam boiler and IGCC standards on partial carbon capture and sequestration. The impact of any changes to this rule will depend on the content of the final rule and the outcome of any legal challenges.
Additional domestic GHG policies may emerge in the future requiring the United States to transition to a lower GHG emitting economy. The Southern Company system has transitioned from an electric generating mix of 70% coal and 15% natural gas in 2007 to a mix of 30% coal and 46% natural gas in 2018, along with over 8,000 MWs of renewable resources. This transition has been supported in part by the Southern Company system retiring 4,226 MWs of coal- and oil-fired generating capacity since 2010 and converting 3,280 MWs of generating capacity from coal to natural gas since 2015. In addition, Southern Company Gas has replaced approximately 5,600 miles of bare steel and cast-iron pipe, resulting in removal of approximately 2.5 million metric tons of GHG from its natural gas distribution system since 1998. Based on ownership or financial control of facilities, the Southern Company system's 2017 GHG emissions (CO 2 equivalent) were approximately 98 million metric tons, with 2018 emissions estimated at 98 million metric tons. This equates to a reduction of 36% between 2007 and 2018. The 2018 estimates include GHG emissions attributable to each of Elizabethtown Gas, Elkton Gas, Florida City Gas, and the Florida Plants through the date of the applicable disposition. See Note 15 to the financial statements for additional information regarding disposition activities.
In April 2018, Southern Company established an intermediate goal of a 50% reduction in carbon emissions from 2007 levels by 2030 and a long-term goal of low- to no-carbon operations by 2050. To achieve these goals, the Southern Company system expects to continue growing its renewable energy portfolio, optimize technology advancements to modernize its transmission and distribution systems, increase the use of natural gas for generation, complete ongoing construction projects, including Georgia Power's interest in Plant Vogtle Units 3 and 4, invest in energy efficiency, and continue research and development efforts focused on technologies to lower GHG emissions. The Southern Company system's ability to achieve these goals also will be dependent on many external factors, including supportive national energy policies, low natural gas prices, and the development, deployment, and advancement of relevant energy technologies.

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FERC Matters
Open Access Transmission Tariff
On May 10, 2018, AMEA and Cooperative Energy filed with the FERC a complaint against SCS and the traditional electric operating companies claiming that the current 11.25% base ROE used in calculating the annual transmission revenue requirements of the traditional electric operating companies' open access transmission tariff is unjust and unreasonable as measured by the applicable FERC standards. The complaint requested that the base ROE be set no higher than 8.65% and that the FERC order refunds for the difference in revenue requirements that results from applying a just and reasonable ROE established in this proceeding upon determining the current ROE is unjust and unreasonable. On June 18, 2018, SCS and the traditional electric operating companies filed their response challenging the adequacy of the showing presented by the complainants and offering support for the current ROE. On September 6, 2018, the FERC issued an order establishing a refund effective date of May 10, 2018 in the event a refund is due and initiating an investigation and settlement procedures regarding the current base ROE. Through December 31, 2018, the estimated maximum potential refund is not expected to be material to Southern Company's results of operations or cash flows. The ultimate outcome of this matter cannot be determined at this time.
Southern Company Gas
Southern Company Gas' gas pipeline investments business is involved in two significant pipeline construction projects, the Atlantic Coast Pipeline (5% ownership) and the PennEast Pipeline (20% ownership), which received FERC approval in October 2017 and January 2018, respectively. Southern Company Gas' total capital expenditures, excluding AFUDC, at completion are expected to be between $350 million and $390 million for the Atlantic Coast Pipeline and $276 million for the PennEast Pipeline. These projects, along with Southern Company Gas' existing pipelines, are intended to provide diverse sources of natural gas supplies to customers, resolve current and long-term supply planning for new capacity, enhance system reliability, and generate economic development in the areas served.
Work continues with state and federal agencies to obtain the required permits to begin construction on the PennEast Pipeline. Any material delays may impact forecasted capital expenditures and the expected in-service date.
The Atlantic Coast Pipeline has experienced challenges to its permits since construction began in 2018. During the third and fourth quarters 2018, a FERC stop work order, together with delays in obtaining permits necessary for construction and construction delays due to judicial actions, impacted the cost and schedule for the project. As a result, total project cost estimates have increased from between $6.0 billion and $6.5 billion to between $7.0 billion and $7.8 billion, excluding financing costs. Southern Company Gas' share of the total project costs is 5% and Southern Company Gas' investment at December 31, 2018 totaled $83 million. The operator of the joint venture currently expects to achieve a late 2020 in-service date for at least key segments of the Atlantic Coast Pipeline, while the remainder may extend into early 2021. Southern Company Gas has evaluated the recoverability of its investment and determined there was no impairment as of December 31, 2018. Abnormal weather, work delays (including due to judicial or regulatory action), and other conditions may result in additional cost or schedule modifications, which could result in an impairment of Southern Company Gas' investment and could have a material impact on Southern Company's financial statements.
The ultimate outcome of these matters cannot be determined at this time. See Notes 7 and 9 to the financial statements under " Southern Company Gas Equity Method Investments " and " Guarantees ," respectively, for additional information on these pipeline projects.
Regulatory Matters
Alabama Power
Alabama Power 's revenues from regulated retail operations are collected through various rate mechanisms subject to the oversight of the Alabama PSC. Alabama Power currently recovers its costs from the regulated retail business primarily through Rate RSE, Rate CNP, Rate ECR, and Rate NDR. In addition, the Alabama PSC issues accounting orders to address current events impacting Alabama Power. See Note 2 to the financial statements under " Alabama Power " for additional information regarding Alabama Power's rate mechanisms and accounting orders.
Rate RSE
The Alabama PSC has adopted Rate RSE that provides for periodic annual adjustments based upon Alabama Power's projected weighted common equity return (WCER) compared to an allowable range. Rate RSE adjustments are based on forward-looking information for the applicable upcoming calendar year. Rate RSE adjustments for any two-year period, when averaged together, cannot exceed 4.0% and any annual adjustment is limited to 5.0%. When the projected WCER is under the allowed range, there is

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an adjusting point of 5.98% and eligibility for a performance-based adder of seven basis points, or 0.07%, to the WCER adjusting point if Alabama Power (i) has an "A" credit rating equivalent with at least one of the recognized rating agencies or (ii) is in the top one-third of a designated customer value benchmark survey. If Alabama Power's actual retail return is above the allowed WCER range, the excess will be refunded to customers unless otherwise directed by the Alabama PSC; however, there is no provision for additional customer billings should the actual retail return fall below the WCER range. Prior to January 2019, retail rates remained unchanged when the WCER range was between 5.75% and 6.21%.
On May 1, 2018, the Alabama PSC approved modifications to Rate RSE and other commitments designed to position Alabama Power to address the growing pressure on its credit quality resulting from the Tax Reform Legislation, without increasing retail rates under Rate RSE in the near term. Alabama Power plans to reduce growth in total debt by increasing equity, with corresponding reductions in debt issuances, thereby de-leveraging its capital structure. Alabama Power's goal is to achieve an equity ratio of approximately 55% by the end of 2025. At December 31, 2018, Alabama Power's equity ratio was approximately 47%.
The approved modifications to Rate RSE began for billings in January 2019. The modifications include reducing the top of the allowed WCER range from 6.21% to 6.15% and modifications to the refund mechanism applicable to prior year actual results. The modifications to the refund mechanism allow Alabama Power to retain a portion of the revenue that causes the actual WCER for a given year to exceed the allowed range.
Generally, if Alabama Power's actual WCER is between 6.15% and 7.65%, customers will receive 25% of the amount between 6.15% and 6.65%, 40% of the amount between 6.65% and 7.15%, and 75% of the amount between 7.15% and 7.65%. Customers will receive all amounts in excess of an actual WCER of 7.65%.
In conjunction with these modifications to Rate RSE, on May 8, 2018, Alabama Power consented to a moratorium on any upward adjustments under Rate RSE for 2019 and 2020 and will also return $50 million to customers through bill credits in 2019.
On November 30, 2018, Alabama Power made its required annual Rate RSE submission to the Alabama PSC of projected data for calendar year 2019. Projected earnings were within the specified range; therefore, retail rates under Rate RSE remain unchanged for 2019.
At December 31, 2018, Alabama Power's retail return exceeded the allowed WCER range, which resulted in Alabama Power establishing a regulatory liability of $109 million for Rate RSE refunds. In accordance with an Alabama PSC order issued on February 5, 2019, Alabama Power will apply $75 million to reduce the Rate ECR under recovered balance and the remaining $34 million will be refunded to customers through bill credits in July through September 2019.
Rate CNP PPA
Alabama Power's retail rates, approved by the Alabama PSC, provide for adjustments under Rate CNP to recognize the placing of new generating facilities into retail service. Alabama Power may also recover retail costs associated with certificated PPAs under Rate CNP PPA. No adjustments to Rate CNP PPA occurred during the period 2016 through 2018 and no adjustment is expected in 2019.
In accordance with an accounting order issued in February 2017 by the Alabama PSC, Alabama Power reclassified $69 million of the December 31, 2016 Rate CNP PPA under recovered balance to a separate regulatory asset. The amortization of the new regulatory asset through Rate RSE will begin concurrently with the effective date of Alabama Power's next depreciation study, which is expected to occur no later than 2022.
Rate CNP Compliance
Rate CNP Compliance allows for the recovery of Alabama Power's retail costs associated with laws, regulations, and other such mandates directed at the utility industry involving the environment, security, reliability, safety, sustainability, or similar considerations impacting Alabama Power's facilities or operations. Rate CNP Compliance is based on forward-looking information and provides for the recovery of these costs pursuant to a factor that is calculated annually. Compliance costs to be recovered include operations and maintenance expenses, depreciation, and a return on certain invested capital. Revenues for Rate CNP Compliance, as recorded on the financial statements, are adjusted for differences in actual recoverable costs and amounts billed in current regulated rates. Accordingly, changes in the billing factor will have no significant effect on revenues or net income, but will affect annual cash flow. Changes in Rate CNP Compliance-related operations and maintenance expenses and depreciation generally will have no effect on net income.
In accordance with an accounting order issued in February 2017 by the Alabama PSC, Alabama Power reclassified $36 million of its under recovered balance in Rate CNP Compliance to a separate regulatory asset. The amortization of the new regulatory asset

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through Rate RSE will begin concurrently with the effective date of Alabama Power's next depreciation study, which is expected to occur no later than 2022.
On November 30, 2018, Alabama Power submitted calculations associated with its cost of complying with environmental mandates, as provided under Rate CNP Compliance. The filing reflected a projected unrecovered retail revenue requirement for environmental compliance of approximately $205 million, which is being recovered in the billing months of January 2019 through December 2019.
Tax Reform Accounting Order
On May 1, 2018, the Alabama PSC approved an accounting order that authorized Alabama Power to defer the benefits of federal excess deferred income taxes associated with the Tax Reform Legislation for the year ended December 31, 2018 as a regulatory liability and to use up to $30 million of such deferrals to offset under recovered amounts under Rate ECR. The estimated deferrals for the year ended December 31, 2018 totaled approximately $63 million, subject to adjustment following the filing of the 2018 tax return, of which $30 million was used to offset the Rate ECR under recovered balance and $33 million is recorded in other regulatory liabilities, deferred on the balance sheet to be used for the benefit of customers as determined by the Alabama PSC at a future date. See Note 10 to the financial statements under "Current and Deferred Income Taxes" for additional information.
Environmental Accounting Order
Based on an order from the Alabama PSC (Environmental Accounting Order), Alabama Power is allowed to establish a regulatory asset to record the unrecovered investment costs, including the unrecovered plant asset balance and the unrecovered costs associated with site removal and closure associated with future unit retirements caused by environmental regulations. The regulatory asset is being amortized and recovered over the affected unit's remaining useful life, as established prior to the decision regarding early retirement through Rate CNP Compliance. At December 31, 2018, this regulatory asset had a balance of $42 million. See " Environmental Matters Environmental Laws and Regulations " herein for additional information regarding environmental regulations.
Subsequent to December 31, 2018, Alabama Power determined that Plant Gorgas Units 8, 9, and 10 (approximately 1,000 MWs) will be retired by April 15, 2019 due to the expected costs of compliance with federal and state environmental regulations. In accordance with the Environmental Accounting Order, approximately $740 million of net investment costs will be transferred to a regulatory asset at the retirement date and recovered over the affected units' remaining useful lives, as established prior to the decision to retire.
Georgia Power
Georgia Power's revenues from regulated retail operations are collected through various rate mechanisms subject to the oversight of the Georgia PSC. Georgia Power currently recovers its costs from the regulated retail business through the 2013 ARP, which includes traditional base tariff rates, Demand-Side Management (DSM) tariffs, Environmental Compliance Cost Recovery (ECCR) tariffs, and Municipal Franchise Fee (MFF) tariffs. Georgia Power is scheduled to file a base rate case by July 1, 2019, which may continue or modify these tariffs. In addition, financing costs on certified construction costs of Plant Vogtle Units 3 and 4 are being collected through the NCCR tariff and fuel costs are collected through a separate fuel cost recovery tariff. See Note 2 to the financial statements under " Georgia Power " for additional information.
Rate Plans
Pursuant to the terms and conditions of a settlement agreement related to Southern Company's acquisition of Southern Company Gas approved by the Georgia PSC in 2016, the 2013 ARP will continue in effect until December 31, 2019, and Georgia Power will be required to file its next base rate case by July 1, 2019. Furthermore, through December 31, 2019, Georgia Power will retain its merger savings, net of transition costs, as defined in the settlement agreement; through December 31, 2022, such net merger savings will be shared on a 60/40 basis with customers; thereafter, all merger savings will be retained by customers. See Note 15 to the financial statements under " Southern Company Merger with Southern Company Gas " for additional information regarding the Merger.
There were no changes to Georgia Power's traditional base tariff rates, ECCR tariff, DSM tariffs, or MFF tariff in 2017 or 2018.
Under the 2013 ARP, Georgia Power's retail ROE is set at 10.95% and earnings are evaluated against a retail ROE range of 10.00% to 12.00%. Two-thirds of any earnings above 12.00% will be directly refunded to customers, with the remaining one-third retained by Georgia Power. There will be no recovery of any earnings shortfall below 10.00% on an actual basis. In 2016, Georgia Power's retail ROE exceeded 12.00%, and Georgia Power refunded to retail customers in 2018 approximately $40 million as approved by the Georgia PSC. On February 5, 2019, the Georgia PSC approved a settlement between Georgia Power and the staff

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of the Georgia PSC under which Georgia Power's retail ROE for 2017 was stipulated to exceed 12.00% and Georgia Power will reduce certain regulatory assets by approximately $4 million in lieu of providing refunds to retail customers. In 2018, Georgia Power's retail ROE exceeded 12.00%, and Georgia Power accrued approximately $100 million to refund to retail customers, subject to review and approval by the Georgia PSC.
On April 3, 2018, the Georgia PSC approved the Georgia Power Tax Reform Settlement Agreement. Pursuant to the Georgia Power Tax Reform Settlement Agreement, to reflect the federal income tax rate reduction impact of the Tax Reform Legislation, Georgia Power will refund to customers a total of $330 million through bill credits. Georgia Power issued bill credits of approximately $130 million in 2018 and will issue bill credits of approximately $95 million in June 2019 and $105 million in February 2020. In addition, Georgia Power is deferring as a regulatory liability (i) the revenue equivalent of the tax expense reduction resulting from legislation lowering the Georgia state income tax rate from 6.00% to 5.75% in 2019 and (ii) the entire benefit of federal and state excess accumulated deferred income taxes, which is expected to total approximately $700 million at December 31, 2019. At December 31, 2018, the related regulatory liability balance totaled $610 million . The amortization of these regulatory liabilities is expected to be addressed in the Georgia Power 2019 Base Rate Case. If there is not a base rate case in 2019, customers will receive $185 million in annual bill credits beginning in 2020, with any additional federal and state income tax savings deferred as a regulatory liability, until Georgia Power's next base rate case.
To address some of the negative cash flow and credit quality impacts of the Tax Reform Legislation, the Georgia PSC also approved an increase in Georgia Power's retail equity ratio to the lower of (i) Georgia Power's actual common equity weight in its capital structure or (ii) 55% , until the Georgia Power 2019 Base Rate Case. At December 31, 2018, Georgia Power's actual retail common equity ratio (on a 13-month average basis) was approximately 55% . Benefits from reduced federal income tax rates in excess of the amounts refunded to customers will be retained by Georgia Power to cover the carrying costs of the incremental equity in 2018 and 2019.
Integrated Resource Plan
See " Environmental Matters " herein for additional information regarding proposed and final EPA rules and regulations, including revisions to ELG for steam electric power plants and additional regulations of CCR and CO 2 .
In 2016, the Georgia PSC approved Georgia Power's triennial Integrated Resource Plan (2016 IRP) including the reclassification of the remaining net book value of Plant Mitchell Unit 3 and costs associated with materials and supplies remaining at the unit retirement date to a regulatory asset. Recovery of the unit's net book value will continue through December 31, 2019, as provided in the 2013 ARP. The timing of the recovery of the remaining balance of the unit's net book value as of December 31, 2019 and costs associated with materials and supplies remaining at the unit retirement date was deferred for consideration in the Georgia Power 2019 Base Rate Case.
In the 2016 IRP, the Georgia PSC also approved recovery of costs up to $99 million through June 30, 2019 to preserve nuclear generation as an option at a future generation site in Stewart County, Georgia. In March 2017, the Georgia PSC approved Georgia Power's decision to suspend work at the site due to changing economics, including lower load forecasts and fuel costs. The timing of recovery for costs incurred of approximately $50 million is expected to be determined by the Georgia PSC in the Georgia Power 2019 Base Rate Case.
On January 31, 2019, Georgia Power filed its triennial IRP (2019 IRP). The filing includes a request to decertify and retire Plant Hammond Units 1 through 4 (840 MWs) and Plant McIntosh Unit 1 (142.5 MWs) upon approval of the 2019 IRP.
In the 2019 IRP, Georgia Power requested approval to reclassify the remaining net book value of Plant Hammond Units 1 through 4 (approximately $520 million at December 31, 2018) upon retirement to a regulatory asset to be amortized ratably over a period equal to the applicable unit's remaining useful life through 2035. For Plant McIntosh Unit 1, Georgia Power requested approval to reclassify the remaining net book value (approximately $40 million at December 31, 2018) upon retirement to a regulatory asset to be amortized over a three -year period to be determined in the Georgia Power 2019 Base Rate Case. Georgia Power also requested approval to reclassify any unusable material and supplies inventory balances remaining at the applicable unit's retirement date to a regulatory asset for recovery over a period to be determined in the Georgia Power 2019 Base Rate Case.
The 2019 IRP also includes a request to certify approximately 25 MWs of capacity at Plant Scherer Unit 3 for the retail jurisdiction beginning January 1, 2020, following the expiration of a wholesale PPA.
The 2019 IRP also includes details regarding ARO costs associated with ash pond and landfill closures and post-closure care. Georgia Power requested the timing and rate of recovery of these costs be determined by the Georgia PSC in the Georgia Power 2019 Base Rate Case. See "Environmental Matters – Environmental Laws and Regulations – Coal Combustion Residuals" and FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements and Contractual Obligations" herein and Note 6 to the financial statements for additional information regarding Georgia Power's AROs.

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Georgia Power also requested approval to issue two capacity-based requests for proposals (RFP). If approved, the first capacity-based RFP will seek resources that can provide capacity beginning in 2022 or 2023 and the second capacity-based RFP will seek resources that can provide capacity beginning in 2026, 2027, or 2028. Additionally, the 2019 IRP includes a request to procure an additional 1,000 MWs of renewable resources through a competitive bidding process. Georgia Power also proposed to invest in a portfolio of up to 50 MWs of battery energy storage technologies.
A decision from the Georgia PSC on the 2019 IRP is expected in mid-2019.
The ultimate outcome of these matters cannot be determined at this time.
Storm Damage Recovery
Georgia Power is accruing $30 million annually through December 31, 2019, as provided in the 2013 ARP, for incremental operations and maintenance costs of damage from major storms to its transmission and distribution facilities. At December 31, 2018, the total balance in the regulatory asset related to storm damage was $416 million. During October 2018, Hurricane Michael caused significant damage to Georgia Power's transmission and distribution facilities. The incremental restoration costs related to this hurricane deferred in the regulatory asset for storm damage totaled approximately $115 million. Hurricanes Irma and Matthew also caused significant damage to Georgia Power's transmission and distribution facilities during September 2017 and October 2016, respectively. The incremental restoration costs related to Hurricanes Irma and Matthew deferred in Georgia Power's regulatory asset for storm damage totaled approximately $250 million . The rate of storm damage cost recovery is expected to be adjusted as part of the Georgia Power 2019 Base Rate Case and further adjusted in future regulatory proceedings as necessary. The ultimate outcome of this matter cannot be determined at this time. See Note 2 to the financial statements under " Georgia Power Storm Damage Recovery " for additional information regarding Georgia Power's storm damage reserve.
Mississippi Power
Mississippi Power's retail base rates generally are set under the PEP, a rate plan approved by the Mississippi PSC. Two filings are made for each calendar year: the PEP projected filing, which is typically filed prior to the beginning of the year based on a projected revenue requirement, and the PEP lookback filing, which is filed after the end of the year and allows for review of the actual revenue requirement compared to the projected filing.
On February 7, 2018, Mississippi Power revised its annual projected PEP filing for 2018 to reflect the impacts of the Tax Reform Legislation. The revised filing requested an increase of $26 million in annual revenues, based on a performance adjusted ROE of 9.33% and an increased equity ratio of 55%. On July 27, 2018, Mississippi Power and the MPUS entered into a settlement agreement with respect to the 2018 PEP filing and all unresolved PEP filings for prior years (PEP Settlement Agreement), which was approved by the Mississippi PSC on August 7, 2018. Rates under the PEP Settlement Agreement became effective with the first billing cycle of September 2018. The PEP Settlement Agreement provides for an increase of approximately $21.6 million in annual base retail revenues, which excludes certain compensation costs contested by the MPUS, as well as approximately $2 million which was subsequently approved for recovery through Mississippi Power's 2018 Energy Efficiency Cost Rider.
Pursuant to the PEP Settlement Agreement, Mississippi Power's performance-adjusted allowed ROE is 9.31% and its allowed equity ratio is capped at 51%, pending further review by the Mississippi PSC. In lieu of the requested equity ratio increase, Mississippi Power retained $44 million of excess accumulated deferred income taxes resulting from the Tax Reform Legislation until the conclusion of Mississippi Power's next base rate case, which is scheduled to be filed in the fourth quarter 2019 (Mississippi Power 2019 Base Rate Case). Further, Mississippi Power agreed to seek equity contributions sufficient to restore its equity ratio to 50% by December 31, 2018.
Pursuant to the PEP Settlement Agreement, PEP proceedings are suspended until after the conclusion of the Mississippi Power 2019 Base Rate Case and Mississippi Power is not required to make any PEP filings for regulatory years 2018, 2019, and 2020. The PEP Settlement Agreement also resolved all open PEP filings with no change to customer rates.
Kemper County Energy Facility
In 2018, Mississippi Power recorded pre-tax charges to income of $37 million ( $27 million after tax), primarily resulting from the abandonment and related closure activities and ongoing period costs, net of sales proceeds, for the mine and gasifier-related assets at the Kemper County energy facility. In addition, Mississippi Power recorded a credit to earnings of $95 million in the fourth quarter 2018 primarily resulting from the reduction of a valuation allowance for a state income tax net operating loss (NOL) carryforward associated with the Kemper County energy facility. Additional closure costs for the mine and gasifier-related assets, currently estimated at up to $10 million pre-tax (excluding salvage, net of dismantlement costs), may be incurred through the first half of 2020. In addition, period costs, including, but not limited to, costs for compliance and safety, ARO accretion, and property taxes for the mine and gasifier-related assets, are estimated to total $11 million in 2019 and $2 million to $4 million annually in

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2020 through 2023. Mississippi Power is currently evaluating its options regarding the final disposition of the CO 2 pipeline, including removal of the pipeline. This evaluation is expected to be complete later in 2019. If Mississippi Power ultimately decides to remove the CO 2 pipeline, the cost of removal could have a material impact on Southern Company's financial statements. The ultimate outcome of these matters cannot be determined at this time.
The combined cycle and associated common facilities portions of the Kemper County energy facility were dedicated as Plant Ratcliffe on April 27, 2018.
For additional information on the Kemper County energy facility, see Note 2 to the financial statements under " Mississippi Power Kemper County Energy Facility ."
Reserve Margin Plan
On August 6, 2018, Mississippi Power filed its proposed Reserve Margin Plan (RMP), as required by the Mississippi PSC's order in the docket established for the purposes of pursuing a global settlement of the costs related to the Kemper County energy facility. Under the RMP, Mississippi Power proposed alternatives that would reduce its reserve margin, with the most economic of the alternatives being the two-year and seven-year acceleration of the retirement of Plant Watson Units 4 and 5, respectively, to the first quarter 2022 and the four-year acceleration of the retirement of Plant Greene County Units 1 and 2 to the third quarter 2021 and the third quarter 2022, respectively, in order to lower or avoid operating costs. The Plant Greene County unit retirements would require the completion by Alabama Power of proposed transmission and system reliability improvements, as well as agreement by Alabama Power. The RMP filing also states that, in the event the Mississippi PSC ultimately approves an alternative that includes an accelerated retirement, Mississippi Power would require authorization to defer in a regulatory asset for future recovery the remaining net book value of the units at the time of retirement. A decision by the Mississippi PSC that does not include recovery of the remaining book value of any generating units retired could have a material impact on Southern Company's financial statements. The ultimate outcome of this matter cannot be determined at this time.
Government Grants
In 2010, the DOE, through a cooperative agreement with SCS, agreed to fund $270 million of the Kemper County energy facility through the grants awarded to the project by the DOE under the Clean Coal Power Initiative Round 2. Through December 31, 2018, Mississippi Power received total DOE grants of $387 million , of which $382 million reduced the construction costs of the Kemper County energy facility and $5 million reimbursed Mississippi Power for expenses associated with DOE reporting. On December 12, 2018, Mississippi Power filed with the DOE its request for property closeout certification under the contract related to the grants received. Mississippi Power and the DOE are currently in discussions regarding the requested closeout and property disposition, which may require payment to the DOE for a portion of certain property that is to be retained by Mississippi Power. The ultimate outcome of this matter cannot be determined at this time; however, it could have a significant impact on Southern Company's financial statements.
Southern Company Gas
The natural gas distribution utilities are subject to regulation and oversight by their respective state regulatory agencies for the rates charged to their customers and other matters.
The natural gas market for Atlanta Gas Light was deregulated in 1997. Accordingly, Marketers, rather than a traditional utility, sell natural gas to end-use customers in Georgia and handle customer billing functions. Atlanta Gas Light earns revenue for its distribution services by charging rates to its customers based primarily on monthly fixed charges that are set by the Georgia PSC and adjusted periodically.
With the exception of Atlanta Gas Light, the natural gas distribution utilities are authorized by the relevant regulatory agencies in the states in which they serve to use natural gas cost recovery mechanisms that adjust rates to reflect changes in the wholesale cost of natural gas and ensure recovery of all costs prudently incurred in purchasing natural gas for customers. Natural gas cost recovery revenues are adjusted for differences in actual recoverable natural gas costs and amounts billed in current regulated rates. Changes in the billing factor will not have a significant effect on revenues or net income, but will affect cash flows. In addition to natural gas cost recovery mechanisms, there are other cost recovery mechanisms, such as regulatory riders, which vary by utility but allow recovery of certain costs, such as those related to infrastructure replacement programs, as well as environmental remediation and energy efficiency plans. See Note 1 to the financial statements under " Cost of Natural Gas " for additional information.

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Infrastructure Replacement Programs and Capital Projects
In addition to capital expenditures recovered through base rates by each of the natural gas distribution utilities, Nicor Gas and Virginia Natural Gas have separate rate riders that provide timely recovery of capital expenditures for specific infrastructure replacement programs. These infrastructure replacement programs and capital projects are risk-based and designed to update and replace cast iron, bare steel, and mid-vintage plastic materials or expand the natural gas distribution systems to improve reliability and meet operational flexibility and growth. The total expected investment under the infrastructure replacement programs for 2019 is $408 million . See Note 2 to the financial statements under " Southern Company Gas Infrastructure Replacement Programs and Capital Projects " for additional information.
Rate Proceedings
On February 23, 2018, Atlanta Gas Light revised its annual base rate filing to reflect the impacts of the Tax Reform Legislation and requested a $16 million rate reduction in 2018. On May 15, 2018, the Georgia PSC approved a stipulation for Atlanta Gas Light's annual base rates to remain at the 2017 level for 2018 and 2019, with customer credits of $8 million in each of July 2018 and October 2018 to reflect the impacts of the Tax Reform Legislation. The Georgia PSC maintained Atlanta Gas Light's previously authorized earnings band based on a ROE between 10.55% and 10.95% and increased the allowed equity ratio by 4% to an equity ratio of 55% to address the negative cash flow and credit metric impacts of the Tax Reform Legislation. Additionally, Atlanta Gas Light is required to file a traditional base rate case on or before June 1, 2019 for rates effective January 1, 2020.
On January 31, 2018, the Illinois Commission approved a $137 million increase in Nicor Gas' annual base rate revenues, including $93 million related to the recovery of investments under Nicor Gas' infrastructure program, effective February 8, 2018, based on a ROE of 9.8%.
On May 2, 2018, the Illinois Commission approved Nicor Gas' rehearing request for revised base rates to incorporate the reduction in the federal income tax rate as a result of the Tax Reform Legislation. The resulting decrease of approximately $44 million in annual base rate revenues became effective May 5, 2018. Nicor Gas' previously-authorized capital structure and ROE of 9.80% were not addressed in the rehearing and remain unchanged. On November 9, 2018, Nicor Gas filed a general base rate case with the Illinois Commission requesting a $230 million increase in annual base rate revenues. The requested increase is based on a projected test year for the 12-month period ending September 30, 2020, a ROE of 10.6%, and an increase in the equity ratio from 52.0% to 54.0% to address the negative cash flow and credit metric impacts of the Tax Reform Legislation. The Illinois Commission is expected to rule on the requested increase within the 11-month statutory time limit, after which rate adjustments will be effective. The ultimate outcome of this matter cannot be determined at this time.
Fuel Cost Recovery
The traditional electric operating companies each have established fuel cost recovery rates approved by their respective state PSCs. Fuel cost recovery revenues are adjusted for differences in actual recoverable fuel costs and amounts billed in current regulated rates. Accordingly, changes in the billing factor will not have a significant effect on Southern Company's revenues or net income, but will affect cash flow. The traditional electric operating companies continuously monitor their under or over recovered fuel cost balances and make appropriate filings with their state PSCs to adjust fuel cost recovery rates as necessary.
See Note 1 to the financial statements under " Revenues " and Note 2 to the financial statements under " Alabama Power Rate ECR ," " Georgia Power Fuel Cost Recovery ," and " Mississippi Power Fuel Cost Recovery " for additional information.
Construction Program
Overview
The subsidiary companies of Southern Company are engaged in continuous construction programs to accommodate existing and estimated future loads on their respective systems. The Southern Company system intends to continue its strategy of developing and constructing new electric generating facilities, adding environmental modifications to certain existing units, expanding and improving the electric transmission and distribution systems, and updating and expanding the natural gas distribution systems. For the traditional electric operating companies, major generation construction projects are subject to state PSC approval in order to be included in retail rates. While Southern Power generally constructs and acquires generation assets covered by long-term PPAs, any uncontracted capacity could negatively affect future earnings. Southern Company Gas is engaged in various infrastructure improvement programs designed to update or expand the natural gas distribution systems of the natural gas distribution utilities to improve reliability and meet operational flexibility and growth. The natural gas distribution utilities recover their investment and a return associated with these infrastructure programs through their regulated rates. See Note 15 to the financial statements under " Southern Power " for additional information about costs relating to Southern Power's acquisitions that involve construction of renewable energy facilities and Note 2 to the financial statements under " Southern Company Gas Infrastructure Replacement

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Programs and Capital Projects " for additional information regarding infrastructure improvement programs at the natural gas distribution utilities.
The Southern Company system's construction program is currently estimated to total approximately $8.0 billion , $7.7 billion , $6.7 billion , $6.3 billion , and $6.0 billion for 2019 , 2020 , 2021 , 2022 , and 2023 , respectively. The largest construction project currently underway in the Southern Company system is Plant Vogtle Units 3 and 4 (45.7% ownership interest by Georgia Power in the two units, each with approximately 1,100 MWs). See FINANCIAL CONDITION AND LIQUIDITY – " Capital Requirements and Contractual Obligations " herein for additional information regarding Southern Company's capital requirements for its subsidiaries' construction programs.
Nuclear Construction
In 2009, the Georgia PSC certified construction of Plant Vogtle Units 3 and 4. Georgia Power holds a 45.7% ownership interest in Plant Vogtle Units 3 and 4. In 2012, the NRC issued the related combined construction and operating licenses, which allowed full construction of the two AP1000 nuclear units (with electric generating capacity of approximately 1,100 MWs each) and related facilities to begin. Until March 2017, construction on Plant Vogtle Units 3 and 4 continued under the Vogtle 3 and 4 Agreement, which was a substantially fixed price agreement. In March 2017, the EPC Contractor filed for bankruptcy protection under Chapter 11 of the U.S. Bankruptcy Code.
In connection with the EPC Contractor's bankruptcy filing, Georgia Power, acting for itself and as agent for the Vogtle Owners, entered into the Interim Assessment Agreement with the EPC Contractor to allow construction to continue. The Interim Assessment Agreement expired in July 2017 when Georgia Power, acting for itself and as agent for the other Vogtle Owners, and the EPC Contractor entered into the Vogtle Services Agreement. Under the Vogtle Services Agreement, Westinghouse provides facility design and engineering services, procurement and technical support, and staff augmentation on a time and materials cost basis. The Vogtle Services Agreement provides that it will continue until the start-up and testing of Plant Vogtle Units 3 and 4 are complete and electricity is generated and sold from both units. The Vogtle Services Agreement is terminable by the Vogtle Owners upon 30 days' written notice.
In October 2017, Georgia Power, acting for itself and as agent for the other Vogtle Owners, executed the Bechtel Agreement, a cost reimbursable plus fee arrangement, whereby Bechtel is reimbursed for actual costs plus a base fee and an at-risk fee, which is subject to adjustment based on Bechtel's performance against cost and schedule targets. Each Vogtle Owner is severally (not jointly) liable for its proportionate share, based on its ownership interest, of all amounts owed to Bechtel under the Bechtel Agreement. The Vogtle Owners may terminate the Bechtel Agreement at any time for their convenience, provided that the Vogtle Owners will be required to pay amounts related to work performed prior to the termination (including the applicable portion of the base fee), certain termination-related costs, and, at certain stages of the work, the applicable portion of the at-risk fee. Bechtel may terminate the Bechtel Agreement under certain circumstances, including certain Vogtle Owner suspensions of work, certain breaches of the Bechtel Agreement by the Vogtle Owners, Vogtle Owner insolvency, and certain other events. Pursuant to the Loan Guarantee Agreement between Georgia Power and the DOE, Georgia Power is required to obtain the DOE's approval of the Bechtel Agreement prior to obtaining any further advances under the Loan Guarantee Agreement.
Cost and Schedule
Georgia Power's approximate proportionate share of the remaining estimated capital cost to complete Plant Vogtle Units 3 and 4 by the expected in-service dates of November 2021 and November 2022, respectively, is as follows:
 
(in billions)
Base project capital cost forecast (a)(b)
$
8.0

Construction contingency estimate
0.4

Total project capital cost forecast (a)(b)
8.4

Net investment as of December 31, 2018 (b)
(4.6
)
Remaining estimate to complete (a)
$
3.8

(a)
Excludes financing costs expected to be capitalized through AFUDC of approximately $315 million .
(b)
Net of $1.7 billion received from Toshiba under the Guarantee Settlement Agreement and approximately $188 million in related Customer Refunds.
Georgia Power estimates that its financing costs for construction of Plant Vogtle Units 3 and 4 will total approximately $3.1 billion , of which $1.9 billion had been incurred through December 31, 2018 .
As construction continues, challenges with management of contractors, subcontractors, and vendors; labor productivity, availability, and/or cost escalation; procurement, fabrication, delivery, assembly, and/or installation and testing, including any

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required engineering changes, of plant systems, structures, and components (some of which are based on new technology that only recently began initial operation in the global nuclear industry at this scale); or other issues could arise and change the projected schedule and estimated cost. Monthly construction production targets required to maintain the current project schedule will continue to increase significantly throughout 2019. To meet these increasing monthly targets, existing craft construction productivity must improve and additional craft laborers must be retained and deployed.
Georgia Power and Southern Nuclear believe it is a leading practice in connection with a construction project of this size and complexity to periodically validate recent construction progress in comparison to the projected schedule and to verify and update quantities of commodities remaining to install, labor productivity, and forecasted staffing needs. This verification process, led by Southern Nuclear, was underway as of December 31, 2018 and is expected to be completed during the second quarter 2019. Georgia Power currently does not anticipate any material changes to the total estimated project capital cost forecast for Plant Vogtle Units 3 and 4 or the expected in-service dates of November 2021 and November 2022, respectively, resulting from this verification process. However, the ultimate impact on cost and schedule, if any, will not be known until the verification process is completed. Georgia Power is required to report the results and any project impacts to the Georgia PSC by May 15, 2019.
There have been technical and procedural challenges to the construction and licensing of Plant Vogtle Units 3 and 4 at the federal and state level and additional challenges may arise. Processes are in place that are designed to assure compliance with the requirements specified in the Westinghouse Design Control Document and the combined construction and operating licenses, including inspections by Southern Nuclear and the NRC that occur throughout construction. As a result of such compliance processes, certain license amendment requests have been filed and approved or are pending before the NRC. Various design and other licensing-based compliance matters, including the timely resolution of ITAAC and the related approvals by the NRC, may arise, which may result in additional license amendments or require other resolution. If any license amendment requests or other licensing-based compliance issues are not resolved in a timely manner, there may be delays in the project schedule that could result in increased costs.
The ultimate outcome of these matters cannot be determined at this time. However, any extension of the project schedule is currently estimated to result in additional base capital costs of approximately $50 million per month, based on Georgia Power's ownership interests, and AFUDC of approximately $12 million per month. While Georgia Power is not precluded from seeking recovery of any future capital cost forecast increase, management will ultimately determine whether or not to seek recovery. Any further changes to the capital cost forecast that are not expected to be recoverable through regulated rates will be required to be charged to income and such charges could be material.
Joint Owner Contracts
In November 2017, the Vogtle Owners entered into an amendment to their joint ownership agreements for Plant Vogtle Units 3 and 4 to provide for, among other conditions, additional Vogtle Owner approval requirements. Effective August 31, 2018, the Vogtle Owners further amended the joint ownership agreements to clarify and provide procedures for certain provisions of the joint ownership agreements related to adverse events that require the vote of the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 to continue construction (as amended, and together with the November 2017 amendment, the Vogtle Joint Ownership Agreements). The Vogtle Joint Ownership Agreements also confirm that the Vogtle Owners' sole recourse against Georgia Power or Southern Nuclear for any action or inaction in connection with their performance as agent for the Vogtle Owners is limited to removal of Georgia Power and/or Southern Nuclear as agent, except in cases of willful misconduct.
As a result of the increase in the total project capital cost forecast and Georgia Power's decision not to seek rate recovery of the increase in the base capital costs as described below, the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 were required to vote to continue construction. On September 26, 2018, the Vogtle Owners unanimously voted to continue construction of Plant Vogtle Units 3 and 4.
Amendments to the Vogtle Joint Ownership Agreements
In connection with the vote to continue construction, Georgia Power entered into (i) the Vogtle Owner Term Sheet with the other Vogtle Owners and MEAG's wholly-owned subsidiaries MEAG SPVJ, MEAG Power SPVM, LLC (MEAG SPVM), and MEAG Power SPVP, LLC (MEAG SPVP) to take certain actions which partially mitigate potential financial exposure for the other Vogtle Owners, including additional amendments to the Vogtle Joint Ownership Agreements and the purchase of PTCs from the other Vogtle Owners, and (ii) the MEAG Term Sheet with MEAG and MEAG SPVJ to provide funding with respect to MEAG SPVJ's ownership interest in Plant Vogtle Units 3 and 4 (Project J) under certain circumstances. On January 14, 2019, Georgia Power, MEAG, and MEAG SPVJ entered into an agreement to implement the provisions of the MEAG Term Sheet (MEAG Funding Agreement). On February 18, 2019, Georgia Power, the other Vogtle Owners, and MEAG's wholly-owned subsidiaries MEAG SPVJ, MEAG SPVM, and MEAG SPVP entered into certain amendments to the Vogtle Joint Ownership Agreements to implement the provisions of the Vogtle Owner Term Sheet (Global Amendments).

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Pursuant to the Global Amendments, and consistent with the Vogtle Owner Term Sheet, the Vogtle Joint Ownership Agreements were modified as follows: (i) each Vogtle Owner must pay its proportionate share of qualifying construction costs for Plant Vogtle Units 3 and 4 based on its ownership percentage up to the estimated cost at completion (EAC) for Plant Vogtle Units 3 and 4 which formed the basis of Georgia Power's forecast of $8.4 billion in the nineteenth VCM plus $800 million ; (ii) Georgia Power will be responsible for 55.7% of actual qualifying construction costs between $800 million and $1.6 billion over the EAC in the nineteenth VCM (resulting in $80 million of potential additional costs to Georgia Power), with the remaining Vogtle Owners responsible for 44.3% of such costs pro rata in accordance with their respective ownership interests; and (iii) Georgia Power will be responsible for 65.7% of qualifying construction costs between $1.6 billion and $2.1 billion over the EAC in the nineteenth VCM (resulting in a further $100 million of potential additional costs to Georgia Power), with the remaining Vogtle Owners responsible for 34.3% of such costs pro rata in accordance with their respective ownership interests.
If the EAC is revised and exceeds the EAC in the nineteenth VCM by more than $2.1 billion , each of the other Vogtle Owners will have a one-time option at the time the project budget forecast is so revised to tender a portion of its ownership interest to Georgia Power in exchange for Georgia Power's agreement to pay 100% of such Vogtle Owner's remaining share of total construction costs in excess of the EAC in the nineteenth VCM plus $2.1 billion . In this event, Georgia Power will have the option of cancelling the project in lieu of purchasing a portion of the ownership interest of any other Vogtle Owner. If Georgia Power accepts the offer to purchase a portion of another Vogtle Owner's ownership interest in Plant Vogtle Units 3 and 4, the ownership interest(s) to be conveyed from the tendering Vogtle Owner(s) to Georgia Power will be calculated based on the proportion of the cumulative amount of construction costs paid by each such tendering Vogtle Owner(s) and by Georgia Power as of the COD of Plant Vogtle Unit 4. For purposes of this calculation, payments made by Georgia Power on behalf of another Vogtle Owner in accordance with the second and third items described in the paragraph above will be treated as payments made by the applicable Vogtle Owner.
In the event the actual costs of construction at completion of a Unit are less than the EAC reflected in the nineteenth VCM report and such Unit is placed in service in accordance with the schedule projected in the nineteenth VCM report (i.e., Plant Vogtle Unit 3 is placed in service by November 2021 or Plant Vogtle Unit 4 is placed in service by November 2022), Georgia Power will be entitled to 60.7% of the cost savings with respect to the relevant Unit and the remaining Vogtle Owners will be entitled to 39.3% of such savings on a pro rata basis in accordance with their respective ownership interests.
For purposes of the foregoing provisions, qualifying construction costs will not include costs (i) resulting from force majeure events, including governmental actions or inactions (or significant delays associated with issuance of such actions) that affect the licensing, completion, start-up, operations, or financing of Plant Vogtle Units 3 and 4, administrative proceedings or litigation regarding ITAAC or other regulatory challenges to commencement of operation of Plant Vogtle Units 3 and 4, and changes in laws or regulations governing Plant Vogtle Units 3 and 4, (ii) legal fees and legal expenses incurred due to litigation with contractors or subcontractors that are not subsidiaries or affiliates of Southern Company, and (iii) additional costs caused by requests from the Vogtle Owners other than Georgia Power, except for the exercise of a right to vote granted under the Vogtle Joint Ownership Agreements, that increase costs by $100,000 or more.
Pursuant to the Global Amendments, and consistent with the Vogtle Owner Term Sheet, the provisions of the Vogtle Joint Ownership Agreements requiring that Vogtle Owners holding 90% of the ownership interests in Plant Vogtle Units 3 and 4 vote to continue construction following certain adverse events (Project Adverse Events) were modified. Pursuant to the Global Amendments, the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 must vote to continue construction if certain Project Adverse Events occur, including: (i) the bankruptcy of Toshiba; (ii) the termination or rejection in bankruptcy of certain agreements, including the Vogtle Services Agreement, the Bechtel Agreement, or the agency agreement with Southern Nuclear; (iii) Georgia Power publicly announces its intention not to submit for rate recovery any portion of its investment in Plant Vogtle Units 3 and 4 or the Georgia PSC determines that any of Georgia Power's costs relating to the construction of Plant Vogtle Units 3 and 4 will not be recovered in retail rates, excluding any additional amounts paid by Georgia Power on behalf of the other Vogtle Owners pursuant to the Global Amendments described above and the first 6% of costs during any six -month VCM reporting period that are disallowed by the Georgia PSC for recovery, or for which Georgia Power elects not to seek cost recovery, through retail rates; and (iv) an incremental extension of one year or more over the most recently approved schedule. Under the Global Amendments, Georgia Power may cancel the project at any time in its sole discretion.
In addition, pursuant to the Vogtle Joint Ownership Agreements, the required approval of holders of ownership interests in Plant Vogtle Units 3 and 4 is at least (i) 90% for a change of the primary construction contractor and (ii) 67% for material amendments to the Vogtle Services Agreement or agreements with Southern Nuclear or the primary construction contractor, including the Bechtel Agreement.
The Global Amendments provide that if the holders of at least 90% of the ownership interests fail to vote in favor of continuing the project following any future Project Adverse Event, work on Plant Vogtle Units 3 and 4 will continue for a period of 30 days if

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the holders of more than 50% of the ownership interests vote in favor of continuing construction (Majority Voting Owners). In such a case, the Vogtle Owners (i) have agreed to negotiate in good faith towards the resumption of the project, (ii) if no agreement is reached during such 30 -day period, the project will be cancelled, and (iii) in the event of such a cancellation, the Majority Voting Owners will be obligated to reimburse any other Vogtle Owner for the incremental costs it incurred during such 30 -day negotiation period.
Purchase of PTCs During Commercial Operation
Pursuant to the Global Amendments, and consistent with the Vogtle Owner Term Sheet, Georgia Power has agreed to purchase additional PTCs from OPC, Dalton, MEAG SPVM, MEAG SPVP, and MEAG SPVJ (to the extent any MEAG SPVJ PTC rights remain after any purchases required under the MEAG Funding Agreement as described below) at varying purchase prices dependent upon the actual cost to complete construction of Plant Vogtle Units 3 and 4 as compared to the EAC reflected in the nineteenth VCM report. The purchases are at the option of the applicable Vogtle Owner.
Potential Funding to MEAG Project J
Pursuant to the MEAG Funding Agreement, and consistent with the MEAG Term Sheet, if MEAG SPVJ is unable to make its payments due under the Vogtle Joint Ownership Agreements solely as a result of the occurrence of one of the following situations that materially impedes access to capital markets for MEAG for Project J: (i) the conduct of JEA or the City of Jacksonville, such as JEA's legal challenges of its obligations under a PPA with MEAG (PPA-J), or (ii) PPA-J is declared void by a court of competent jurisdiction or rejected by JEA under the applicable provisions of the U.S. Bankruptcy Code (each of (i) and (ii), a JEA Default), at MEAG's request, Georgia Power will purchase from MEAG SPVJ the rights to PTCs attributable to MEAG SPVJ's share of Plant Vogtle Units 3 and 4 (approximately 206 MWs) within 30 days of such request at varying prices dependent upon the stage of construction of Plant Vogtle Units 3 and 4. The aggregate purchase price of the PTCs, together with any advances made as described in the next paragraph, shall not exceed $300 million .
At the option of MEAG, as an alternative or supplement to Georgia Power's purchase of PTCs as described above, Georgia Power has agreed to provide up to $250 million in funding to MEAG for Project J in the form of advances (either advances under the Vogtle Joint Ownership Agreements or the purchase of MEAG Project J bonds, at the discretion of Georgia Power), subject to any required approvals of the Georgia PSC and the DOE.
In the event MEAG SPVJ certifies to Georgia Power that it is unable to fund its obligations under the Vogtle Joint Ownership Agreements as a result of a JEA Default and Georgia Power becomes obligated to provide funding as described above, MEAG is required to (i) assign to Georgia Power its right to vote on any future Project Adverse Event and (ii) diligently pursue JEA for its breach of PPA-J. In addition, Georgia Power agreed that it will not sue MEAG for any amounts due from MEAG SPVJ under MEAG's guarantee of MEAG SPVJ's obligations so long as MEAG SPVJ complies with the terms of the MEAG Funding Agreement as to its payment obligations and the other non-payment provisions of the Vogtle Joint Ownership Agreements.
Under the terms of the MEAG Funding Agreement, Georgia Power may cancel the project in lieu of providing funding in the form of advances or PTC purchases.
The ultimate outcome of these matters cannot be determined at this time.
Regulatory Matters
In 2009, the Georgia PSC voted to certify construction of Plant Vogtle Units 3 and 4 with a certified capital cost of $4.418 billion . In addition, in 2009 the Georgia PSC approved inclusion of the Plant Vogtle Units 3 and 4 related CWIP accounts in rate base, and the State of Georgia enacted the Georgia Nuclear Energy Financing Act, which allows Georgia Power to recover financing costs for Plant Vogtle Units 3 and 4. Financing costs are recovered on all applicable certified costs through annual adjustments to the NCCR tariff up to the certified capital cost of $4.418 billion . At December 31, 2018 , Georgia Power had recovered approximately $1.9 billion of financing costs. Financing costs related to capital costs above $4.418 billion will be recovered through AFUDC; however, Georgia Power will not record AFUDC related to any capital costs in excess of the total deemed reasonable by the Georgia PSC (currently $7.3 billion ) and not requested for rate recovery. On December 18, 2018, the Georgia PSC approved Georgia Power's request to increase the NCCR tariff by $88 million annually, effective January 1, 2019.
Georgia Power is required to file semi-annual VCM reports with the Georgia PSC by February 28 and August 31 of each year. In 2013, in connection with the eighth VCM report, the Georgia PSC approved a stipulation between Georgia Power and the staff of the Georgia PSC to waive the requirement to amend the Plant Vogtle Units 3 and 4 certificate in accordance with the 2009 certification order until the completion of Plant Vogtle Unit 3, or earlier if deemed appropriate by the Georgia PSC and Georgia Power.

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In 2016, the Georgia PSC voted to approve a settlement agreement (Vogtle Cost Settlement Agreement) resolving certain prudency matters in connection with the fifteenth VCM report. In December 2017, the Georgia PSC voted to approve (and issued its related order on January 11, 2018) Georgia Power's seventeenth VCM report, which included a recommendation to continue construction with Southern Nuclear as project manager and Bechtel serving as the primary construction contractor, and modified the Vogtle Cost Settlement Agreement. The Vogtle Cost Settlement Agreement, as modified by the January 11, 2018 order, resolved the following regulatory matters related to Plant Vogtle Units 3 and 4: (i) none of the $3.3 billion of costs incurred through December 31, 2015 and reflected in the fourteenth VCM report should be disallowed from rate base on the basis of imprudence; (ii) the Contractor Settlement Agreement was reasonable and prudent and none of the amounts paid pursuant to the Contractor Settlement Agreement should be disallowed from rate base on the basis of imprudence; (iii) (a) capital costs incurred up to $5.68 billion would be presumed to be reasonable and prudent with the burden of proof on any party challenging such costs, (b) Georgia Power would have the burden to show that any capital costs above $5.68 billion were prudent, and (c) a revised capital cost forecast of $7.3 billion (after reflecting the impact of payments received under the Guarantee Settlement Agreement and related Customer Refunds) was found reasonable; (iv) construction of Plant Vogtle Units 3 and 4 should be completed, with Southern Nuclear serving as project manager and Bechtel as primary contractor; (v) approved and deemed reasonable Georgia Power's revised schedule placing Plant Vogtle Units 3 and 4 in service in November 2021 and November 2022, respectively; (vi) confirmed that the revised cost forecast does not represent a cost cap and that prudence decisions on cost recovery will be made at a later date, consistent with applicable Georgia law; (vii) reduced the ROE used to calculate the NCCR tariff (a) from 10.95% (the ROE rate setting point authorized by the Georgia PSC in the 2013 ARP) to 10.00% effective January 1, 2016, (b) from 10.00% to 8.30% , effective January 1, 2020, and (c) from 8.30% to 5.30% , effective January 1, 2021 (provided that the ROE in no case will be less than Georgia Power's average cost of long-term debt); (viii) reduced the ROE used for AFUDC equity for Plant Vogtle Units 3 and 4 from 10.00% to Georgia Power's average cost of long-term debt, effective January 1, 2018; and (ix) agreed that upon Unit 3 reaching commercial operation, retail base rates would be adjusted to include carrying costs on those capital costs deemed prudent in the Vogtle Cost Settlement Agreement. The January 11, 2018 order also stated that if Plant Vogtle Units 3 and 4 are not commercially operational by June 1, 2021 and June 1, 2022, respectively, the ROE used to calculate the NCCR tariff will be further reduced by 10 basis points each month (but not lower than Georgia Power's average cost of long-term debt) until the respective Unit is commercially operational. The ROE reductions negatively impacted earnings by approximately $100 million , $25 million , and $20 million in 2018, 2017, and 2016, respectively, and are estimated to have negative earnings impacts of approximately $75 million in 2019 and an aggregate of approximately $615 million from 2020 to 2022.
In its January 11, 2018 order, the Georgia PSC also stated if other conditions change and assumptions upon which Georgia Power's seventeenth VCM report are based do not materialize, the Georgia PSC reserved the right to reconsider the decision to continue construction.
On February 12, 2018, Georgia Interfaith Power & Light, Inc. (GIPL) and Partnership for Southern Equity, Inc. (PSE) filed a petition appealing the Georgia PSC's January 11, 2018 order with the Fulton County Superior Court. On March 8, 2018, Georgia Watch filed a similar appeal to the Fulton County Superior Court for judicial review of the Georgia PSC's decision and denial of Georgia Watch's motion for reconsideration. On December 21, 2018, the Fulton County Superior Court granted Georgia Power's motion to dismiss the two appeals. On January 9, 2019, GIPL, PSE, and Georgia Watch filed an appeal of this decision with the Georgia Court of Appeals. Georgia Power believes the appeal has no merit; however, an adverse outcome in the appeal combined with subsequent adverse action by the Georgia PSC could have a material impact on Southern Company's results of operations, financial condition, and liquidity.
In preparation for its nineteenth VCM filing, Georgia Power requested Southern Nuclear to perform a full cost reforecast for the project. This reforecast, performed prior to the nineteenth VCM filing, resulted in a $0.7 billion increase to the base capital cost forecast reported in the second quarter 2018. This base cost increase primarily resulted from changed assumptions related to the finalization of contract scopes and management responsibilities for Bechtel and over 60 subcontractors, labor productivity rates, and craft labor incentives, as well as the related levels of project management, oversight, and support, including field supervision and engineering support.
Although Georgia Power believes these incremental costs are reasonable and necessary to complete the project and the Georgia PSC's order in the seventeenth VCM proceeding specifically states that the construction of Plant Vogtle Units 3 and 4 is not subject to a cost cap, Georgia Power did not seek rate recovery for these cost increases included in the current base capital cost forecast (or any related financing costs) in the nineteenth VCM report. In connection with future VCM filings, Georgia Power may request the Georgia PSC to evaluate costs currently included in the construction contingency estimate for rate recovery as and when they are appropriately included in the base capital cost forecast. After considering the significant level of uncertainty that exists regarding the future recoverability of costs included in the construction contingency estimate since the ultimate outcome of these matters is subject to the outcome of future assessments by management, as well as Georgia PSC decisions in these future regulatory proceedings, Georgia Power recorded a total pre-tax charge to income of $1.1 billion ( $0.8 billion after

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tax) in the second quarter 2018, which includes the total increase in the base capital cost forecast and construction contingency estimate.
On August 31, 2018, Georgia Power filed its nineteenth VCM report with the Georgia PSC, which requested approval of $578 million of construction capital costs incurred from January 1, 2018 through June 30, 2018. On February 19, 2019, the Georgia PSC approved the nineteenth VCM, but deferred approval of $51.6 million of expenditures related to Georgia Power's portion of an administrative claim filed in the Westinghouse bankruptcy proceedings. Through the nineteenth VCM, the Georgia PSC has approved total construction capital costs incurred through June 30, 2018 of $5.4 billion (before $1.7 billion of payments received under the Guarantee Settlement Agreement and approximately $188 million in related Customer Refunds). In addition, the staff of the Georgia PSC requested, and Georgia Power agreed, to file its twentieth VCM report concurrently with the twenty-first VCM report by August 31, 2019.
The ultimate outcome of these matters cannot be determined at this time.
DOE Financing
At December 31, 2018 , Georgia Power had borrowed $2.6 billion related to Plant Vogtle Units 3 and 4 costs through the Loan Guarantee Agreement and a multi-advance credit facility among Georgia Power, the DOE, and the FFB, which provides for borrowings of up to $3.46 billion , subject to the satisfaction of certain conditions. In September 2017, the DOE issued a conditional commitment to Georgia Power for up to approximately $1.67 billion in additional guaranteed loans under the Loan Guarantee Agreement. In September 2018, the DOE extended the conditional commitment to March 31, 2019. Any further extension must be approved by the DOE. Final approval and issuance of these additional loan guarantees by the DOE cannot be assured and are subject to the negotiation of definitive agreements, completion of due diligence by the DOE, receipt of any necessary regulatory approvals, and satisfaction of other conditions. See Note 8 to the financial statements under " Long-term Debt DOE Loan Guarantee Borrowings " for additional information, including applicable covenants, events of default, mandatory prepayment events (including any decision not to continue construction of Plant Vogtle Units 3 and 4), and conditions to borrowing.
The ultimate outcome of these matters cannot be determined at this time.
Income Tax Matters
Federal Tax Reform Legislation
In December 2017, the Tax Reform Legislation was signed into law and became effective on January 1, 2018. The Tax Reform Legislation, among other things, reduced the federal corporate income tax rate to 21%, retained normalization provisions for public utility property and existing renewable energy incentives, and repealed the corporate alternative minimum tax. In addition, under the Tax Reform Legislation, NOLs generated after December 31, 2017 can no longer be carried back to previous tax years but can be carried forward indefinitely, with utilization limited to 80% of taxable income of the subsequent tax year. The projected reduction of the consolidated income tax liability resulting from the tax rate reduction also delays the expected utilization of existing tax credit carryforwards.
Following the enactment of the Tax Reform Legislation, the SEC staff issued Staff Accounting Bulletin 118 – "Income Tax Accounting Implications of the Tax Cuts and Jobs Act" (SAB 118), which provided for a measurement period of up to one year from the enactment date to complete accounting under GAAP for the tax effects of the legislation. Due to the complex and comprehensive nature of the enacted tax law changes and their application under GAAP, Southern Company considered all amounts recorded in the financial statements as a result of the Tax Reform Legislation "provisional" as discussed in SAB 118 and subject to revision prior to filing its 2017 tax return in the fourth quarter 2018. Southern Company recognized tax benefits of $30 million and $264 million in 2018 and 2017, respectively, for a total net tax benefit of $294 million as a result of the Tax Reform Legislation. In addition, in total, Southern Company recorded a $417 million decrease in regulatory assets and a $6.2 billion increase in regulatory liabilities as a result of the Tax Reform Legislation and $16 million of stranded excess deferred tax balances in AOCI at December 31, 2017 were adjusted through retained earnings in 2018. As of December 31, 2018, Southern Company considered the measurement of impacts from the Tax Reform Legislation on deferred income tax assets and liabilities, primarily due to the impact of the reduction of the corporate income tax rate, to be complete.
However, the IRS continues to issue regulations that provide further interpretation and guidance on the law and each state's adoption of the provisions contained in the Tax Reform Legislation remains uncertain. In addition, the regulatory treatment of certain impacts of the Tax Reform Legislation is subject to the discretion of the FERC and each state's regulatory commission. The ultimate impact of these matters cannot be determined at this time. See Note 2 to the financial statements for additional information regarding the traditional electric operating companies' and the natural gas distribution utilities' rate filings, including

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amounts returned to customers during 2018, to reflect the impacts of the Tax Reform Legislation. Also see FINANCIAL CONDITION AND LIQUIDITY – "Credit Rating Risk" herein and Note 10 to the financial statements under " Current and Deferred Income Taxes " for additional information.
Bonus Depreciation
Under the Tax Reform Legislation, projects with binding contracts prior to September 28, 2017 and placed in service after September 27, 2017 remain eligible for bonus depreciation under the PATH Act. The PATH Act allowed for 50% bonus depreciation for 2015 through 2017, 40% bonus depreciation for 2018, and 30% bonus depreciation for 2019 and certain long-lived assets placed in service in 2020. Based on provisional estimates, bonus depreciation is expected to result in positive cash flows of approximately $300 million for the 2018 tax year and approximately $130 million for the 2019 tax year. The ultimate outcome of this matter cannot be determined at this time.
Tax Credits
The Tax Reform Legislation retained the renewable energy incentives that were included in the PATH Act. The PATH Act allows for 30% ITC for solar projects that commence construction by December 31, 2019; 26% ITC for solar projects that commence construction in 2020; 22% ITC for solar projects that commence construction in 2021; and a permanent 10% ITC for solar projects that commence construction on or after January 1, 2022. In addition, the PATH Act allows for 100% PTC for wind projects that commenced construction in 2016; 80% PTC for wind projects that commenced construction in 2017; 60% PTC for wind projects that commenced construction in 2018 and 40% PTC for wind projects that commence construction in 2019. Wind projects commencing construction after 2019 will not be entitled to any PTCs. Southern Company has received ITCs and PTCs in connection with investments in solar, wind, and biomass facilities primarily at Southern Power and Georgia Power. See Note 1 to the financial statements under " Income Taxes " and Note 10 to the financial statements under " Current and Deferred Income Taxes Tax Credit Carryforwards " for additional information regarding the utilization and amortization of credits and the tax benefit related to basis differences.
Other Matters
Southern Company and its subsidiaries are involved in various other matters being litigated and regulatory matters that could affect future earnings. In addition, Southern Company and its subsidiaries are subject to certain claims and legal actions arising in the ordinary course of business. The business activities of Southern Company's subsidiaries are subject to extensive governmental regulation related to public health and the environment, such as laws and regulations governing air, water, land, and protection of other natural resources. Litigation over environmental issues and claims of various types, including property damage, personal injury, common law nuisance, and citizen enforcement of environmental laws and regulations, has occurred throughout the U.S. This litigation has included claims for damages alleged to have been caused by CO 2 and other emissions, CCR, and alleged exposure to hazardous materials, and/or requests for injunctive relief in connection with such matters.
The ultimate outcome of such pending or potential litigation or regulatory matters cannot be predicted at this time; however, for current proceedings not specifically reported herein or in Notes 2 and 3 to the financial statements, management does not anticipate that the ultimate liabilities, if any, arising from such current proceedings would have a material effect on Southern Company's financial statements. See Notes 2 and 3 to the financial statements for a discussion of various other contingencies, regulatory matters, and other matters being litigated which may affect future earnings potential.
Litigation
In January 2017, a putative securities class action complaint was filed against Southern Company, certain of its officers, and certain former Mississippi Power officers in the U.S. District Court for the Northern District of Georgia, Atlanta Division, by Monroe County Employees' Retirement System on behalf of all persons who purchased shares of Southern Company's common stock between April 25, 2012 and October 29, 2013. The complaint alleges that Southern Company, certain of its officers, and certain former Mississippi Power officers made materially false and misleading statements regarding the Kemper County energy facility in violation of certain provisions under the Securities Exchange Act of 1934, as amended. The complaint seeks, among other things, compensatory damages and litigation costs and attorneys' fees. In June 2017, the plaintiffs filed an amended complaint that provided additional detail about their claims, increased the purported class period by one day, and added certain other former Mississippi Power officers as defendants. In July 2017, the defendants filed a motion to dismiss the plaintiffs' amended complaint with prejudice, to which the plaintiffs filed an opposition in September 2017. On March 29, 2018, the U.S. District Court for the Northern District of Georgia, Atlanta Division, issued an order granting, in part, the defendants' motion to dismiss. The court dismissed certain claims against certain officers of Southern Company and Mississippi Power and dismissed the allegations related to a number of the statements that plaintiffs challenged as being false or misleading. On April 26, 2018, the

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defendants filed a motion for reconsideration of the court's order, seeking dismissal of the remaining claims in the lawsuit. On August 10, 2018, the court denied the motion for reconsideration and denied a motion to certify the issue for interlocutory appeal.
In February 2017, Jean Vineyard filed a shareholder derivative lawsuit and, in May 2017, Judy Mesirov filed a shareholder derivative lawsuit, each in the U.S. District Court for the Northern District of Georgia. Each of these lawsuits names as defendants Southern Company, certain of its directors, certain of its officers, and certain former Mississippi Power officers. In August 2017, these two shareholder derivative lawsuits were consolidated in the U.S. District Court for the Northern District of Georgia. The complaints allege that the defendants caused Southern Company to make false or misleading statements regarding the Kemper County energy facility cost and schedule. Further, the complaints allege that the defendants were unjustly enriched and caused the waste of corporate assets and also allege that the individual defendants violated their fiduciary duties. Each plaintiff seeks to recover, on behalf of Southern Company, unspecified actual damages and, on each plaintiff's own behalf, attorneys' fees and costs in bringing the lawsuit. Each plaintiff also seeks certain changes to Southern Company's corporate governance and internal processes. On April 25, 2018, the court entered an order staying this lawsuit until 30 days after the resolution of any dispositive motions or any settlement, whichever is earlier, in the putative securities class action.
In May 2017, Helen E. Piper Survivor's Trust filed a shareholder derivative lawsuit in the Superior Court of Gwinnett County, State of Georgia that names as defendants Southern Company, certain of its directors, certain of its officers, and certain former Mississippi Power officers. The complaint alleges that the individual defendants, among other things, breached their fiduciary duties in connection with schedule delays and cost overruns associated with the construction of the Kemper County energy facility. The complaint further alleges that the individual defendants authorized or failed to correct false and misleading statements regarding the Kemper County energy facility schedule and cost and failed to implement necessary internal controls to prevent harm to Southern Company. The plaintiff seeks to recover, on behalf of Southern Company, unspecified actual damages and disgorgement of profits and, on its behalf, attorneys' fees and costs in bringing the lawsuit. The plaintiff also seeks certain unspecified changes to Southern Company's corporate governance and internal processes. On May 4, 2018, the court entered an order staying this lawsuit until 30 days after the resolution of any dispositive motions or any settlement, whichever is earlier, in the putative securities class action.
On May 18, 2018, Southern Company and Mississippi Power received a notice of dispute and arbitration demand filed by Martin Product Sales, LLC (Martin) based on two agreements, both related to Kemper IGCC byproducts for which Mississippi Power provided termination notices in September 2017. Martin alleges breach of contract, breach of good faith and fair dealing, fraud and misrepresentation, and civil conspiracy and makes a claim for damages in the amount of approximately $143 million, as well as additional unspecified damages, attorney's fees, costs, and interest. In the first quarter 2019, Mississippi Power and Southern Company filed motions to dismiss.
Southern Company believes these legal challenges have no merit; however, an adverse outcome in any of these proceedings could have an impact on Southern Company's results of operations, financial condition, and liquidity. Southern Company will vigorously defend itself in these matters, the ultimate outcome of which cannot be determined at this time.
Investments in Leveraged Leases
A subsidiary of Southern Holdings has several leveraged lease agreements, with original terms ranging up to 45 years , which relate to international and domestic energy generation, distribution, and transportation assets. Southern Company receives federal income tax deductions for depreciation and amortization, as well as interest on long-term debt related to these investments. Southern Company reviews all important lease assumptions at least annually, or more frequently if events or changes in circumstances indicate that a change in assumptions has occurred or may occur. These assumptions include the effective tax rate, the residual value, the credit quality of the lessees, and the timing of expected tax cash flows. See Note 1 to the financial statements under " Leveraged Leases " for additional information.
The ability of the lessees to make required payments to the Southern Holdings subsidiary is dependent on the operational performance of the assets. In 2017, the financial and operational performance of one of the lessees and the associated generation assets raised significant concerns about the short-term ability of the generation assets to produce cash flows sufficient to support ongoing operations and the lessee's contractual obligations and its ability to make the remaining semi-annual lease payments to the Southern Holdings subsidiary beginning in June 2018. As a result of operational improvements in 2018, the 2018 lease payments were paid in full. However, operational issues and the resulting cash liquidity challenges persist and significant concerns continue regarding the lessee's ability to make the remaining semi-annual lease payments. These operational challenges may also impact the expected residual value of the assets at the end of the lease term in 2047. If any future lease payment is not paid in full, the Southern Holdings subsidiary may be unable to make its corresponding payment to the holders of the underlying non-recourse debt related to the generation assets. Failure to make the required payment to the debtholders could represent an event of default that would give the debtholders the right to foreclose on, and take ownership of, the generation assets from the

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Southern Holdings subsidiary, in effect terminating the lease and resulting in the write-off of the related lease receivable, which would result in a reduction in net income of approximately $86 million after tax based on the lease receivable balance at December 31, 2018 . Southern Company has evaluated the recoverability of the lease receivable and the expected residual value of the generation assets at the end of the lease under various scenarios and has concluded that its investment in the leveraged lease is not impaired at December 31, 2018 . Southern Company will continue to monitor the operational performance of the underlying assets and evaluate the ability of the lessee to continue to make the required lease payments. The ultimate outcome of this matter cannot be determined at this time.
Mississippi Power
In conjunction with Southern Company's sale of Gulf Power, Mississippi Power and Gulf Power have committed to seek a restructuring of their 50% undivided ownership interests in Plant Daniel such that each of them would, after the restructuring, own 100% of a generating unit. On January 15, 2019, Gulf Power provided notice to Mississippi Power that Gulf Power will retire its share of the generating capacity of Plant Daniel on January 15, 2024. Mississippi Power has the option to purchase Gulf Power's ownership interest for $1 on January 15, 2024, provided that Mississippi Power exercises the option no later than 120 days prior to that date. Mississippi Power is assessing the potential operational and economic effects of Gulf Power's notice. The ultimate outcome of these matters remains subject to completion of Mississippi Power's evaluations and applicable regulatory approvals, including the FERC and the Mississippi PSC, and cannot now be determined. See Note 15 to the financial statements under " Southern Company's Sale of Gulf Power " for information regarding the sale of Gulf Power.
Southern Power
On January 29, 2019, Pacific Gas & Electric Company (PG&E) filed petitions to reorganize under Chapter 11 of the U.S. Bankruptcy Code. Southern Power, together with its noncontrolling partners, owns four solar facilities where PG&E is the energy off-taker for approximately 207 MWs of capacity under long-term PPAs. PG&E is also the transmission provider for these facilities and two of Southern Power's other solar facilities. Southern Power has evaluated the recoverability of its investments in these solar facilities under various scenarios, including selling the related energy into the competitive markets, and has concluded they are not impaired. At December 31, 2018, Southern Power had outstanding accounts receivables due from PG&E of $1 million related to the PPAs and $36 million related to the transmission interconnections. Southern Company does not expect a material impact to its financial statements if, as a result of the bankruptcy proceedings, PG&E does not perform in accordance with the PPAs or the terms of the PPAs are renegotiated; however, the ultimate outcome of this matter cannot be determined at this time.
Southern Company Gas
A wholly-owned subsidiary of Southern Company Gas owns and operates a natural gas storage facility consisting of two salt dome caverns in Louisiana. Periodic integrity tests are required in accordance with rules of the Louisiana Department of Natural Resources (DNR). In August 2017, in connection with an ongoing integrity project, updated seismic mapping indicated the proximity of one of the caverns to the edge of the salt dome may be less than the required minimum and could result in Southern Company Gas retiring the cavern early. At December 31, 2018, the facility's property, plant, and equipment had a net book value of $109 million, of which the cavern itself represents approximately 20%. A potential early retirement of this cavern is dependent upon several factors including compliance with an order from the Louisiana DNR detailing the requirements to place the cavern back in service, which includes, among other things, obtaining core samples to determine the composition of the sheath surrounding the edge of the salt dome.
The cavern continues to maintain its pressures and overall structural integrity. Southern Company Gas intends to monitor the cavern and comply with the Louisiana DNR order through 2020 and place the cavern back in service in 2021. These events were considered in connection with Southern Company Gas' annual long-lived asset impairment analysis, which determined there was no impairment as of December 31, 2018. Any changes in results of monitoring activities, rates at which expiring capacity contracts are re-contracted, timing of placing the cavern back in service, or Louisiana DNR requirements could trigger impairment. Further, early retirement of the cavern could trigger impairment of other long-lived assets associated with the natural gas storage facility. The ultimate outcome of this matter cannot be determined at this time, but could have a significant impact on Southern Company's financial statements.
ACCOUNTING POLICIES
Application of Critical Accounting Policies and Estimates
Southern Company prepares its consolidated financial statements in accordance with GAAP. Significant accounting policies are described in Notes 1 , 5 , and 6 to the financial statements. In the application of these policies, certain estimates are made that may

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have a material impact on Southern Company's results of operations and related disclosures. Different assumptions and measurements could produce estimates that are significantly different from those recorded in the financial statements. Senior management has reviewed and discussed the following critical accounting policies and estimates with the Audit Committee of Southern Company's Board of Directors.
Utility Regulation
Southern Company's traditional electric operating companies and natural gas distribution utilities, which collectively comprised approximately 85% of Southern Company's total operating revenues for 2018 , are subject to retail regulation by their respective state PSCs or other applicable state regulatory agencies and wholesale regulation by the FERC. These regulatory agencies set the rates the traditional electric operating companies and the natural gas distribution utilities are permitted to charge customers based on allowable costs, including a reasonable ROE. As a result, the traditional electric operating companies and the natural gas distribution utilities apply accounting standards which require the financial statements to reflect the effects of rate regulation. Through the ratemaking process, the regulators may require the inclusion of costs or revenues in periods different than when they would be recognized by a non-regulated company. This treatment may result in the deferral of expenses and the recording of related regulatory assets based on anticipated future recovery through rates or the deferral of gains or creation of liabilities and the recording of related regulatory liabilities. The application of the accounting standards has a further effect on Southern Company's financial statements as a result of the estimates of allowable costs used in the ratemaking process. These estimates may differ from those actually incurred by the traditional electric operating companies and the natural gas distribution utilities; therefore, the accounting estimates inherent in specific costs such as depreciation, AROs, and pension and other postretirement benefits have less of a direct impact on Southern Company's results of operations and financial condition than they would on a non-regulated company. See Note 15 to the financial statements for information regarding the sale of Gulf Power and three of Southern Company Gas' natural gas distribution utilities.
As reflected in Note 2 to the financial statements under " Southern Company Regulatory Assets and Liabilities ," significant regulatory assets and liabilities have been recorded. Management reviews the ultimate recoverability of these regulatory assets and any requirement to refund these regulatory liabilities based on applicable regulatory guidelines and GAAP. However, adverse legislative, judicial, or regulatory actions could materially impact the amounts of such regulatory assets and liabilities and could adversely impact Southern Company's financial statements.
Estimated Cost, Schedule, and Rate Recovery for the Construction of Plant Vogtle Units 3 and 4
In 2016, the Georgia PSC approved the Vogtle Cost Settlement Agreement, which resolved certain prudency matters in connection with Georgia Power's fifteenth VCM report. In December 2017, the Georgia PSC approved Georgia Power's seventeenth VCM report, which included a recommendation to continue construction of Plant Vogtle Units 3 and 4, with Southern Nuclear serving as project manager and Bechtel serving as the primary construction contractor, as well as a modification of the Vogtle Cost Settlement Agreement. The Georgia PSC's related order stated that under the modified Vogtle Cost Settlement Agreement, (i) none of the $3.3 billion of costs incurred through December 31, 2015 should be disallowed as imprudent; (ii) capital costs incurred up to $5.68 billion would be presumed to be reasonable and prudent with the burden of proof on any party challenging such costs; (iii) Georgia Power would have the burden of proof to show that any capital costs above $5.68 billion were prudent; (iv) Georgia Power's total project capital cost forecast of $7.3 billion (net of $1.7 billion received under the Guarantee Settlement Agreement and approximately $188 million in related Customer Refunds) was found reasonable and did not represent a cost cap; and (v) prudence decisions would be made subsequent to achieving fuel load for Unit 4.
In its order, the Georgia PSC also stated if other conditions change and assumptions upon which Georgia Power's seventeenth VCM report are based do not materialize, the Georgia PSC reserved the right to reconsider the decision to continue construction.
In the second quarter 2018, Georgia Power revised its base cost forecast and estimated contingency to complete construction and start-up of Plant Vogtle Units 3 and 4 to $8.0 billion and $0.4 billion, respectively, for a total project capital cost forecast of $8.4 billion (net of $1.7 billion received under the Guarantee Settlement Agreement and approximately $188 million in related Customer Refunds). Although Georgia Power believes these incremental costs are reasonable and necessary to complete the project and the Georgia PSC's order in the seventeenth VCM proceeding specifically states that the construction of Plant Vogtle Units 3 and 4 is not subject to a cost cap, Georgia Power did not seek rate recovery for the $0.7 billion increase in costs included in the current base capital cost forecast in the nineteenth VCM report. In connection with future VCM filings, Georgia Power may request the Georgia PSC to evaluate costs currently included in the construction contingency estimate for rate recovery as and when they are appropriately included in the base capital cost forecast. After considering the significant level of uncertainty that exists regarding the future recoverability of costs included in the construction contingency estimate since the ultimate outcome of these matters is subject to the outcome of future assessments by management, as well as Georgia PSC decisions in these future

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regulatory proceedings, Georgia Power recorded a total pre-tax charge to income of $1.1 billion ($0.8 billion after tax) in the second quarter 2018.
Georgia Power's revised cost estimate reflects an expected in-service date of November 2021 for Unit 3 and November 2022 for Unit 4.
As construction continues, challenges with management of contractors, subcontractors, and vendors; labor productivity, availability, and/or cost escalation; procurement, fabrication, delivery, assembly, and/or installation and testing, including any required engineering changes, of plant systems, structures, and components (some of which are based on new technology that only recently began initial operation in the global nuclear industry at this scale); or other issues could arise and change the projected schedule and estimated cost. Monthly construction production targets required to maintain the current project schedule will continue to increase significantly throughout 2019. To meet these increasing monthly targets, existing craft construction productivity must improve and additional craft laborers must be retained and deployed.
Georgia Power and Southern Nuclear believe it is a leading practice in connection with a construction project of this size and complexity to periodically validate recent construction progress in comparison to the projected schedule and to verify and update quantities of commodities remaining to install, labor productivity, and forecasted staffing needs. This verification process, led by Southern Nuclear, was underway as of December 31, 2018 and is expected to be completed during the second quarter 2019. Georgia Power currently does not anticipate any material changes to the total estimated project capital cost forecast for Plant Vogtle Units 3 and 4 or the expected in-service dates of November 2021 and November 2022, respectively, resulting from this verification process. However, the ultimate impact on cost and schedule, if any, will not be known until the verification process is completed. Georgia Power is required to report the results and any project impacts to the Georgia PSC by May 15, 2019.
There have been technical and procedural challenges to the construction and licensing of Plant Vogtle Units 3 and 4 at the federal and state level and additional challenges may arise. Processes are in place that are designed to assure compliance with the requirements specified in the Westinghouse Design Control Document and the combined construction and operating licenses, including inspections by Southern Nuclear and the NRC that occur throughout construction. As a result of such compliance processes, certain license amendment requests have been filed and approved or are pending before the NRC. Various design and other licensing-based compliance matters, including the timely resolution of ITAAC and the related approvals by the NRC, may arise, which may result in additional license amendments or require other resolution. If any license amendment requests or other licensing-based compliance issues are not resolved in a timely manner, there may be delays in the project schedule that could result in increased costs.
The ultimate outcome of these matters cannot be determined at this time. Any extension of the in-service dates of November 2021 for Unit 3 and November 2022 for Unit 4 is currently estimated to result in additional base capital costs of approximately $50 million per month, based on Georgia Power's ownership interests, and AFUDC of approximately $12 million per month. While Georgia Power is not precluded from seeking recovery of any future capital cost forecast increase, management will ultimately determine whether or not to seek recovery. Any further changes to the capital cost forecast that are not expected to be recoverable through regulated rates will be required to be charged to income and such charges could be material.
Given the significant complexity involved in estimating the future costs to complete construction and start-up of Plant Vogtle Units 3 and 4 and the significant management judgment necessary to assess the related uncertainties surrounding future rate recovery of any projected cost increases, as well as the potential impact on Southern Company's results of operations and cash flows, Southern Company considers these items to be critical accounting estimates. See Note 2 to the financial statements under " Georgia Power Nuclear Construction " for additional information.
Accounting for Income Taxes
The consolidated income tax provision and deferred income tax assets and liabilities, as well as any unrecognized tax benefits and valuation allowances, require significant judgment and estimates. These estimates are supported by historical tax return data, reasonable projections of taxable income, and interpretations of applicable tax laws and regulations across multiple taxing jurisdictions. The effective tax rate reflects the statutory tax rates and calculated apportionments for the various states in which the Southern Company system operates.
Southern Company files a consolidated federal income tax return and various state income tax returns, some of which are combined or unitary. Under a joint consolidated income tax allocation agreement, each Southern Company subsidiary's current and deferred tax expense is computed on a stand-alone basis and no subsidiary is allocated more current expense than would be paid if it filed a separate income tax return. Certain deductions and credits can be limited at the consolidated or combined level resulting in NOL and tax credit carryforwards that would not otherwise result on a stand-alone basis. Utilization of NOL and tax credit carryforwards and the assessment of valuation allowances are based on significant judgment and extensive analysis of

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Southern Company's current financial position and result of operations, including currently available information about future years, to estimate when future taxable income will be realized.
Current and deferred state income tax liabilities and assets are estimated based on laws of multiple states that determine the income to be apportioned to their jurisdictions. States utilize various formulas to calculate the apportionment of taxable income, primarily using sales, assets, or payroll within the jurisdiction compared to the consolidated totals. In addition, each state varies as to whether a stand-alone, combined, or unitary filing methodology is required. The calculation of deferred state taxes considers apportionment factors and filing methodologies that are expected to apply in future years. The apportionments and methodologies which are ultimately finalized in a manner inconsistent with expectations could have a material effect on Southern Company's financial statements.
Given the significant judgment involved in estimating NOL and tax credit carryforwards and multi-state apportionments for all subsidiaries, Southern Company considers federal and state deferred income tax liabilities and assets to be critical accounting estimates.
Asset Retirement Obligations
AROs are computed as the fair value of the estimated costs for an asset's future retirement and are recorded in the period in which the liability is incurred. The estimated costs are capitalized as part of the related long-lived asset and depreciated over the asset's useful life. In the absence of quoted market prices, AROs are estimated using present value techniques in which estimates of future cash outlays associated with the asset retirements are discounted using a credit-adjusted risk-free rate. Estimates of the timing and amounts of future cash outlays are based on projections of when and how the assets will be retired and the cost of future removal activities.
The liability for AROs primarily relates to facilities that are subject to the CCR Rule and the related state rules, principally ash ponds, and the decommissioning of the Southern Company system's nuclear facilities – Alabama Power's Plant Farley and Georgia Power's ownership interests in Plant Hatch and Plant Vogtle Units 1 and 2. In addition, the Southern Company system has AROs related to various landfill sites, asbestos removal, mine reclamation, land restoration related to solar and wind facilities, and disposal of polychlorinated biphenyls in certain transformers.
The traditional electric operating companies and Southern Company Gas also have identified retirement obligations, such as obligations related to certain electric transmission and distribution facilities, certain asbestos containing material within long-term assets not subject to ongoing repair and maintenance activities, certain wireless communication towers, the disposal of polychlorinated biphenyls in certain transformers, leasehold improvements, equipment on customer property, and property associated with the Southern Company system's rail lines and natural gas pipelines. However, liabilities for the removal of these assets have not been recorded as the fair value of the retirement obligations cannot be reasonably estimated. A liability for these retirement obligations will be recognized when sufficient information becomes available to support a reasonable estimation of the retirement obligation.
The cost estimates for AROs related to the disposal of CCR are based on information using various assumptions related to closure and post-closure costs, timing of future cash outlays, inflation and discount rates, and the potential methods for complying with the CCR Rule. During 2018, Alabama Power and Georgia Power recorded increases of approximately $1.2 billion and $3.1 billion, respectively, to their AROs related to the disposal of CCR and increases of approximately $300 million and $130 million, respectively, to their AROs related to updated nuclear decommissioning cost site studies. Alabama Power's CCR-related update resulted from feasibility studies performed on ash ponds in use at the plants it operates, which indicated that additional closure costs, primarily related to increases in estimated ash volume, water management requirements, and design revisions, will be required to close these ash ponds under the planned closure-in-place methodology. Georgia Power's CCR-related update resulted from a strategic assessment which indicated additional closure costs will be required to close its ash ponds, primarily due to changes in closure strategies, the estimated amount of ash to be excavated, and additional water management requirements necessary to support closure strategies. The traditional electric operating companies expect to periodically update their ARO cost estimates. See FUTURE EARNINGS POTENTIAL – " Environmental Matters Environmental Laws and Regulations Coal Combustion Residuals " herein and Note 6 to the financial statements for additional information.
Given the significant judgment involved in estimating AROs, Southern Company considers the liabilities for AROs to be critical accounting estimates.
Pension and Other Postretirement Benefits
Southern Company's calculation of pension and other postretirement benefits expense is dependent on a number of assumptions. These assumptions include discount rates, healthcare cost trend rates, expected long-term return on plan assets, mortality rates, expected salary and wage increases, and other factors. Components of pension and other postretirement benefits expense include

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Southern Company and Subsidiary Companies 2018 Annual Report


interest and service cost on the pension and other postretirement benefit plans, expected return on plan assets, and amortization of certain unrecognized costs and obligations. Actual results that differ from the assumptions utilized are accumulated and amortized over future periods and, therefore, generally affect recognized expense and the recorded obligation in future periods. While Southern Company believes that the assumptions used are appropriate, differences in actual experience or significant changes in assumptions would affect its pension and other postretirement benefit costs and obligations.
Key elements in determining Southern Company's pension and other postretirement benefit expense are the expected long-term return on plan assets and the discount rate used to measure the benefit plan obligations and the periodic benefit plan expense for future periods. The expected long-term return on pension and other postretirement benefit plan assets is based on Southern Company's investment strategy, historical experience, and expectations for long-term rates of return that consider external actuarial advice. Southern Company determines the long-term return on plan assets by applying the long-term rate of expected returns on various asset classes to Southern Company's target asset allocation. For purposes of determining its liability related to the pension and other postretirement benefit plans, Southern Company discounts the future related cash flows using a single-point discount rate for each plan developed from the weighted average of market-observed yields for high quality fixed income securities with maturities that correspond to expected benefit payments.
The following table illustrates the sensitivity to changes in Southern Company's long-term assumptions with respect to the discount rate, salary increases, and the long-term rate of return on plan assets:
Change in Assumption
Increase/(Decrease) in Total Benefit Expense for 2019
 
Increase/(Decrease) in Projected Obligation for Pension Plan at December 31, 2018
 
Increase/(Decrease) in Projected Obligation for Other Postretirement Benefit Plans at December 31, 2018
 
(in millions)
25 basis point change in discount rate
$37/$(36)
 
$434/$(411)
 
$50/$(48)
25 basis point change in salaries
$11/$(11)
 
$105/$(101)
 
$–/$–
25 basis point change in long-term return on plan assets
$33/$(33)
 
N/A
 
N/A
N/A – Not applicable
See Note 11 to the financial statements for additional information regarding pension and other postretirement benefits.
Goodwill and Other Intangible Assets
The acquisition method of accounting requires the assets acquired and liabilities assumed to be recorded at the date of acquisition at their respective estimated fair values. Southern Company recognizes goodwill as of the acquisition date, as a residual over the fair values of the identifiable net assets acquired. Goodwill is tested for impairment on an annual basis in the fourth quarter of the year as well as on an interim basis as events and changes in circumstances occur. Primarily as a result of the acquisitions of Southern Company Gas and PowerSecure in 2016, goodwill totaled approximately $5.3 billion at December 31, 2018 . As a result of the Southern Company Gas Dispositions, goodwill was reduced by $910 million during 2018. In addition, Southern Company Gas recorded a $42 million goodwill impairment charge in 2018 in contemplation of the sale of Pivotal Home Solutions.
Definite-lived intangible assets acquired are amortized over the estimated useful lives of the respective assets to reflect the pattern in which the economic benefits of the intangible assets are consumed. Whenever events or changes in circumstances indicate that the carrying amount of the intangible assets may not be recoverable, the intangible assets will be reviewed for impairment. Primarily as a result of the acquisitions of Southern Company Gas and PowerSecure and PPA fair value adjustments resulting from Southern Power's acquisitions, other intangible assets, net of amortization totaled approximately $613 million at December 31, 2018 .
The judgments made in determining the estimated fair value assigned to each class of assets acquired and liabilities assumed, as well as asset lives, can significantly impact Southern Company's results of operations. Fair values and useful lives are determined based on, among other factors, the expected future period of benefit of the asset, the various characteristics of the asset, and projected cash flows. As the determination of an asset's fair value and useful life involves management making certain estimates and because these estimates form the basis for the determination of whether or not an impairment charge should be recorded, Southern Company considers these estimates to be critical accounting estimates.
See Note 1 to the financial statements under " Goodwill and Other Intangible Assets and Liabilities " for additional information regarding Southern Company's goodwill and other intangible assets and Note 15 to the financial statements for additional

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Southern Company and Subsidiary Companies 2018 Annual Report


information related to Southern Company's 2016 acquisitions of Southern Company Gas and PowerSecure, as well as the Southern Company Gas Dispositions.
Derivatives and Hedging Activities
Derivative instruments are recorded on the balance sheets as either assets or liabilities measured at their fair value, unless the transactions qualify for the normal purchases or normal sales scope exception and are instead subject to traditional accrual accounting. For those transactions that do not qualify as a normal purchase or normal sale, changes in the derivatives' fair values are recognized concurrently in earnings unless specific hedge accounting criteria are met. If the derivatives meet those criteria, derivative gains and losses offset related results of the hedged item in the income statement in the case of a fair value hedge, or gains and losses are deferred in OCI until the hedged transaction affects earnings in the case of a cash flow hedge. Certain subsidiaries of Southern Company enter into energy-related derivatives that are designated as regulatory hedges where gains and losses are initially recorded as regulatory liabilities and assets and then are included in fuel expense as the underlying fuel is used in operations and ultimately recovered through billings to customers.
Southern Company uses derivative instruments to reduce the impact to the results of operations due to the risk of changes in the price of natural gas, to manage fuel hedging programs per guidelines of state regulatory agencies, and to mitigate residual changes in the price of electricity, weather, interest rates, and foreign currency exchange rates. The fair value of commodity derivative instruments used to manage exposure to changing prices reflects the estimated amounts that Southern Company would receive or pay to terminate or close the contracts at the reporting date. To determine the fair value of the derivative instruments, Southern Company utilizes market data or assumptions that market participants would use in pricing the derivative asset or liability, including assumptions about risk and the risks inherent in the inputs of the valuation technique.
Southern Company classifies derivative assets and liabilities based on the lowest level of input that is significant to the fair value measurement. The assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy. The determination of the fair value of the derivative instruments incorporates various required factors. These factors include:
the creditworthiness of the counterparties involved and the impact of credit enhancements (such as cash deposits and letters of credit);
events specific to a given counterparty; and
the impact of Southern Company's nonperformance risk on its liabilities.
Given the assumptions used in pricing the derivative asset or liability, Southern Company considers the valuation of derivative assets and liabilities a critical accounting estimate. See FINANCIAL CONDITION AND LIQUIDITY – " Market Price Risk " herein and Note 14 to the financial statements for more information.
Contingent Obligations
Southern Company is subject to a number of federal and state laws and regulations as well as other factors and conditions that subject it to environmental, litigation, and other risks. See FUTURE EARNINGS POTENTIAL herein and Notes 2 and 3 to the financial statements for more information regarding certain of these contingencies. Southern Company periodically evaluates its exposure to such risks and records reserves for those matters where a non-tax-related loss is considered probable and reasonably estimable. The adequacy of reserves can be significantly affected by external events or conditions that can be unpredictable; thus, the ultimate outcome of such matters could materially affect Southern Company's results of operations, cash flows, or financial condition.
Recently Issued Accounting Standards
See Note 1 to the financial statements under " Recently Adopted Accounting Standards " for additional information.
In 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 requires lessees to recognize on the balance sheet a lease liability and a right-of-use asset for all leases. ASU 2016-02 also changes the recognition, measurement, and presentation of expense associated with leases and provides clarification regarding the identification of certain components of contracts that would represent a lease. The accounting required by lessors is relatively unchanged and there is no change to the accounting for existing leveraged leases. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018 and Southern Company adopted the new standard effective January 1, 2019.
Southern Company elected the transition methodology provided by ASU No. 2018-11, Leases (Topic 842): Targeted Improvements , whereby the requirements of ASU 2016-02 are applied on a prospective basis as of the adoption date of January 1, 2019, without restating prior periods. Southern Company elected the package of practical expedients provided by ASU 2016-02

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Southern Company and Subsidiary Companies 2018 Annual Report


that allows prior determinations of whether existing contracts are, or contain, leases and the classification of existing leases to continue without reassessment. Additionally, Southern Company applied the use-of-hindsight practical expedient in determining lease terms as of the date of adoption and elected the practical expedient that allows existing land easements not previously accounted for as leases not to be reassessed. Southern Company also made accounting policy elections to account for short-term leases in all asset classes as off-balance sheet leases and combined lease and non-lease components in the computations of lease obligations and right-of-use assets for most asset classes.
The Southern Company system completed the implementation of a new application to track and account for its leases and updated its internal controls and accounting policies to support the accounting for leases under ASU 2016-02. The Southern Company system completed its lease inventory and determined its most significant leases involve PPAs, real estate, and communication towers where certain of Southern Company's subsidiaries are the lessee and PPAs where certain of Southern Company's subsidiaries are the lessor. In the first quarter 2019, the adoption of ASU 2016-02 resulted in recording lease liabilities and right-of-use assets on Southern Company's balance sheet each totaling approximately $2.0 billion , with no impact on Southern Company's statement of income.
FINANCIAL CONDITION AND LIQUIDITY
Overview
Earnings in all periods presented were negatively affected by charges associated with plants under construction; however, Southern Company's financial condition remained stable at December 31, 2018 .
The Southern Company system's cash requirements primarily consist of funding ongoing operations, common stock dividends, capital expenditures, and debt maturities. The Southern Company system's capital expenditures and other investing activities include investments to meet projected long-term demand requirements, including to build new electric generation facilities, to maintain existing electric generation facilities, to comply with environmental regulations including adding environmental modifications to certain existing electric generating units and closures of ash ponds, to expand and improve electric transmission and distribution facilities, to update and expand natural gas distribution systems, and for restoration following major storms. Operating cash flows provide a substantial portion of the Southern Company system's cash needs. For the three-year period from 2019 through 2021 , Southern Company's projected common stock dividends, capital expenditures, and debt maturities are expected to exceed operating cash flows. Southern Company plans to finance future cash needs in excess of its operating cash flows primarily by accessing borrowings from financial institutions and through debt and equity issuances in the capital markets. Southern Company intends to continue to monitor its access to short-term and long-term capital markets as well as bank credit arrangements to meet future capital and liquidity needs. See " Sources of Capital ," " Financing Activities ," and " Capital Requirements and Contractual Obligations " herein for additional information.
Southern Company's investments in the qualified pension plans and the nuclear decommissioning trust funds decreased in value at December 31, 2018 as compared to December 31, 2017 . No contributions to the qualified pension plan were made for the year ended December 31, 2018 and no mandatory contributions to the qualified pension plans are anticipated during 2019 . See " Contractual Obligations " herein and Notes 6 and 11 to the financial statements under " Nuclear Decommissioning " and " Pension Plans ," respectively, for additional information.
Net cash provided from operating activities in 2018 totaled $6.9 billion , an increase of $0.6 billion from 2017 . The increase in net cash provided from operating activities was primarily due to the timing of vendor payments and increased fuel cost recovery. Net cash provided from operating activities in 2017 totaled $6.4 billion , an increase of $1.5 billion from 2016 . Significant changes in operating cash flow for 2017 as compared to 2016 included increases of $1.2 billion related to operating activities of Southern Company Gas, which was acquired on July 1, 2016, and $1.0 billion related to voluntary contributions to the qualified pension plan in 2016, partially offset by the timing of vendor payments.
Net cash used for investing activities in 2018 , 2017 , and 2016 totaled $5.8 billion , $7.2 billion , and $20.0 billion , respectively. The cash used for investing activities in 2018 was primarily due to the traditional electric operating companies' installation of equipment to comply with environmental standards and construction of electric generation, transmission, and distribution facilities and capital expenditures for Southern Company Gas' infrastructure replacement programs, partially offset by proceeds from the sale transactions described in Note 15 to the financial statements. The cash used for investing activities in 2017 was primarily due to the traditional electric operating companies' installation of equipment to comply with environmental standards and construction of electric generation, transmission, and distribution facilities, capital expenditures for Southern Company Gas' infrastructure replacement programs, and Southern Power's renewable acquisitions. The cash used for investing activities in 2016 was primarily due to the closing of the Merger, the acquisition of PowerSecure, Southern Company Gas' investment in SNG, the traditional electric operating companies' construction of electric generation, transmission, and distribution facilities and

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Southern Company and Subsidiary Companies 2018 Annual Report


installation of equipment at electric generating facilities to comply with environmental standards, and Southern Power's acquisitions and construction of renewable facilities and a natural gas facility.
Net cash used for financing activities totaled $1.8 billion in 2018 primarily due to net redemptions and repurchases of long-term debt, common stock dividend payments, and a decrease in commercial paper borrowings, partially offset by net issuances of short-term bank debt, proceeds from Southern Power's sales of non-controlling equity interests in entities indirectly owning substantially all of its solar facilities and eight of its wind facilities, and the issuance of common stock. Net cash provided from financing activities totaled $1.0 billion in 2017 primarily due to net issuances of long-term and short-term debt, partially offset by common stock dividend payments. Net cash provided from financing activities totaled $15.7 billion in 2016 primarily due to issuances of long-term debt and common stock associated with completing the Merger and funding the subsidiaries' continuous construction programs, Southern Power's acquisitions, and Southern Company Gas' investment in SNG, partially offset by redemptions of long-term debt and common stock dividend payments. Fluctuations in cash flow from financing activities vary from year to year based on capital needs and the maturity or redemption of securities.
Significant balance sheet changes in 2018 included the reclassification of $5.7 billion and $3.3 billion in total assets and liabilities held for sale, respectively, primarily associated with Gulf Power, as well as decreases of $3.0 billion and $0.4 billion in total assets and liabilities, respectively, associated with the sales described in Note 15 to the financial statements under " Southern Power " and " Southern Company Gas ." Also see Note 15 to the financial statements under " Southern Company's Sale of Gulf Power " and " Assets Held for Sale " for additional information. After adjusting for these changes, other significant balance sheet changes included an increase of $7.1 billion in total property, plant, and equipment primarily related to the $4.7 billion increase in AROs at Alabama Power and Georgia Power, as well as the traditional electric operating companies' installation of equipment to comply with environmental standards and construction of electric generation, transmission, and distribution facilities and Southern Company Gas' capital expenditures for infrastructure replacement programs, partially offset by the second quarter 2018 charge related to the construction of Plant Vogtle Units 3 and 4; a decrease of $3.1 billion in long-term debt (including amounts due within one year) resulting from the repayment of long-term debt; an increase of $3.0 billion in noncontrolling interests at Southern Power as a result of sales of interests in entities indirectly owning substantially all of its solar facilities and eight of its wind facilities; and an increase of $1.9 billion in other regulatory assets, deferred primarily related to AROs at Georgia Power. See Notes 2 and 15 to the financial statements under " Georgia Power Nuclear Construction " and " Southern Power Sales of Renewable Facility Interests ," respectively, as well as Notes 6 and 8 to the financial statements and "Financing Activities" herein for additional information.
At the end of 2018 , the market price of Southern Company's common stock was $43.92 per share (based on the closing price as reported on the NYSE) and the book value was $23.91 per share, representing a market-to-book value ratio of 184% , compared to $48.09 , $23.99 , and 201% , respectively, at the end of 2017 .
Southern Company's consolidated ratio of common equity to total capitalization plus short-term debt was 32.5% and 31.5% at December 31, 2018 and 2017 , respectively. See Note 8 to the financial statements for additional information.
Sources of Capital
Southern Company intends to meet its future capital needs through operating cash flows, borrowings from financial institutions, and debt and equity issuances in the capital markets. Equity capital can be provided from any combination of Southern Company's stock plans, private placements, or public offerings. The amount and timing of additional equity and debt issuances in 2019 , as well as in subsequent years, will be contingent on Southern Company's investment opportunities and the Southern Company system's capital requirements and will depend upon prevailing market conditions and other factors. See " Capital Requirements and Contractual Obligations " herein for additional information.
Except as described herein, the traditional electric operating companies, Southern Power, and Southern Company Gas plan to obtain the funds required for construction and other purposes from operating cash flows, external security issuances, borrowings from financial institutions, and equity contributions or loans from Southern Company. Southern Power also plans to utilize tax equity partnership contributions, as well as funds resulting from its pending sale of Plant Mankato. However, the amount, type, and timing of any future financings, if needed, will depend upon prevailing market conditions, regulatory approval, and other factors. See Note 15 to the financial statements under " Southern Power Sales of Natural Gas Plants " herein for additional information.
In addition, in 2014, Georgia Power entered into the Loan Guarantee Agreement with the DOE, under which the proceeds of borrowings may be used to reimburse Georgia Power for Eligible Project Costs incurred in connection with its construction of Plant Vogtle Units 3 and 4. Under the Loan Guarantee Agreement, the DOE agreed to guarantee borrowings of up to $3.46 billion (not to exceed 70% of Eligible Project Costs) to be made by Georgia Power under a multi-advance credit facility (FFB Credit Facility) among Georgia Power, the DOE, and the FFB. At December 31, 2018 , Georgia Power had borrowed $2.6 billion under

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the FFB Credit Facility. In July 2017, Georgia Power entered into an amendment to the Loan Guarantee Agreement, which provides that further advances are conditioned upon the DOE's approval of any agreements entered into in replacement of the Vogtle 3 and 4 Agreement and satisfaction of certain other conditions.
In September 2017, the DOE issued a conditional commitment to Georgia Power for up to approximately $1.67 billion of additional guaranteed loans under the Loan Guarantee Agreement. This conditional commitment expires on March 31, 2019, subject to any further extension approved by the DOE. Final approval and issuance of these additional loan guarantees by the DOE cannot be assured and are subject to the negotiation of definitive agreements, completion of due diligence by the DOE, receipt of any necessary regulatory approvals, and satisfaction of other conditions. See Note 8 to the financial statements under " Long-term Debt DOE Loan Guarantee Borrowings " for additional information regarding the Loan Guarantee Agreement, including applicable covenants, events of default, mandatory prepayment events (including any decision not to continue construction of Plant Vogtle Units 3 and 4), and additional conditions to borrowing. Also see Note 2 to the financial statements under " Georgia Power Nuclear Construction " for additional information regarding Plant Vogtle Units 3 and 4.
The issuance of securities by the traditional electric operating companies and Nicor Gas is generally subject to the approval of the applicable state PSC or other applicable state regulatory agency. The issuance of all securities by Mississippi Power and short-term securities by Georgia Power is generally subject to regulatory approval by the FERC. Additionally, with respect to the public offering of securities, Southern Company and certain of its subsidiaries file registration statements with the SEC under the Securities Act of 1933, as amended (1933 Act). The amounts of securities authorized by the appropriate regulatory authorities, as well as the securities registered under the 1933 Act, are continuously monitored and appropriate filings are made to ensure flexibility in the capital markets.
Southern Company, each traditional electric operating company, and Southern Power generally obtain financing separately without credit support from any affiliate. The Southern Company system does not maintain a centralized cash or money pool. Therefore, funds of each company are not commingled with funds of any other company in the Southern Company system.
In addition, Southern Company Gas Capital obtains external financing for Southern Company Gas and its subsidiaries, other than Nicor Gas, which obtains financing separately without credit support from any affiliates. Nicor Gas' commercial paper program supports its working capital needs as Nicor Gas is not permitted to make money pool loans to affiliates. All of the other Southern Company Gas subsidiaries benefit from Southern Company Gas Capital's commercial paper program.
See Note 8 to the financial statements under " Bank Credit Arrangements " for additional information.
At December 31, 2018 , Southern Company's current liabilities exceeded current assets by $4.7 billion , primarily due to $3.2 billion of long-term debt that is due within one year (including approximately $1.3 billion at the parent company, $0.2 billion at Alabama Power, $0.6 billion at Georgia Power, $0.6 billion at Southern Power, and $0.4 billion at Southern Company Gas) and $2.9 billion of notes payable (including approximately $1.8 billion at the parent company, $0.3 billion at Georgia Power, $0.1 billion at Southern Power, and $0.7 billion at Southern Company Gas). Subsequent to December 31, 2018, using proceeds from the sale of Gulf Power, the Southern Company parent entity repaid $0.7 billion of its long-term debt due within one year and all $1.8 billion of its notes payable at December 31, 2018 . See " Financing Activities " herein for additional information. To meet short-term cash needs and contingencies, the Southern Company system has substantial cash flow from operating activities and access to capital markets and financial institutions. Southern Company, the traditional electric operating companies, Southern Power, and Southern Company Gas intend to utilize operating cash flows, as well as commercial paper, lines of credit, bank notes, and securities issuances, as market conditions permit, as well as, under certain circumstances for the traditional electric operating companies, Southern Power, and Southern Company Gas, equity contributions and/or loans from Southern Company to meet their short-term capital needs.

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Southern Company and Subsidiary Companies 2018 Annual Report


At December 31, 2018 , Southern Company and its subsidiaries had approximately $1.4 billion of cash and cash equivalents. Committed credit arrangements with banks at December 31, 2018 were as follows:
 
Expires
 
 
 
Executable Term Loans
 
Expires Within One Year
Company
2019

2020

2022
 
Total
 
Unused (d)
 
One
Year
 
Two
Years
 
Term Out
 
No Term Out
 
(in millions)
Southern Company (a)
$

 
$

 
$
2,000

 
$
2,000

 
$
1,999

 
$

 
$

 
$

 
$

Alabama Power
33

 
500

 
800

 
1,333

 
1,333

 

 

 

 
33

Georgia Power

 

 
1,750

 
1,750

 
1,736

 

 

 

 

Mississippi Power
100

 

 

 
100

 
100

 

 

 

 
100

Southern Power (b)

 

 
750

 
750

 
727

 

 

 

 

Southern Company Gas (c)

 

 
1,900

 
1,900

 
1,895

 

 

 

 

Other
30

 

 

 
30

 
30

 

 

 

 
30

Southern Company Consolidated (e)
$
163

 
$
500

 
$
7,200

 
$
7,863

 
$
7,820

 
$

 
$

 
$

 
$
163

(a)
Represents the Southern Company parent entity.
(b)
Does not include Southern Power Company's $120 million continuing letter of credit facility for standby letters of credit expiring in 2021, of which $17 million was unused at December 31, 2018 . Southern Power's subsidiaries are not parties to its bank credit arrangement.
(c)
Southern Company Gas, as the parent entity, guarantees the obligations of Southern Company Gas Capital, which is the borrower of $1.4 billion of this arrangement. Southern Company Gas' committed credit arrangement also includes $500 million for which Nicor Gas is the borrower and which is restricted for working capital needs of Nicor Gas. Pursuant to this multi-year credit arrangement, the allocations between Southern Company Gas Capital and Nicor Gas may be adjusted.
(d)
Amounts used are for letters of credit.
(e)
Excludes $280 million of committed credit arrangements of Gulf Power, which was sold on January 1, 2019. See Note 15 to the financial statements under " Southern Company's Sale of Gulf Power " for additional information.
See Note 8 to the financial statements under " Bank Credit Arrangements " for additional information.
Most of these bank credit arrangements, as well as the term loan arrangements of Alabama Power and Southern Power Company, contain covenants that limit debt levels and contain cross-acceleration or cross-default provisions to other indebtedness (including guarantee obligations) that are restricted only to the indebtedness of the individual company. Such cross-default provisions to other indebtedness would trigger an event of default if the applicable borrower defaulted on indebtedness or guarantee obligations over a specified threshold. Such cross-acceleration provisions to other indebtedness would trigger an event of default if the applicable borrower defaulted on indebtedness, the payment of which was then accelerated. At December 31, 2018 , Southern Company, the traditional electric operating companies, Southern Power Company, Southern Company Gas, and Nicor Gas were in compliance with all such covenants. None of the bank credit arrangements contain material adverse change clauses at the time of borrowings.
Subject to applicable market conditions, Southern Company and its subsidiaries expect to renew or replace their bank credit arrangements as needed, prior to expiration. In connection therewith, Southern Company and its subsidiaries may extend the maturity dates and/or increase or decrease the lending commitments thereunder.
A portion of the unused credit with banks is allocated to provide liquidity support to the revenue bonds of the traditional electric operating companies and the commercial paper programs of Southern Company, the traditional electric operating companies, Southern Power Company, Southern Company Gas, and Nicor Gas. The amount of variable rate revenue bonds of the traditional electric operating companies outstanding requiring liquidity support at December 31, 2018 was approximately $1.6 billion , which included $82 million related to Gulf Power. In addition, at December 31, 2018 , the traditional electric operating companies had approximately $403 million of revenue bonds outstanding that are required to be remarketed within the next 12 months, which included $58 million related to Gulf Power. See Note 15 to the financial statements under " Southern Company's Sale of Gulf Power " for information regarding the sale of Gulf Power on January 1, 2019. Subsequent to December 31, 2018, Georgia Power redeemed approximately $108 million of obligations related to outstanding variable rate pollution control revenue bonds.
Southern Company, Alabama Power, Georgia Power, Southern Power Company, Southern Company Gas, Nicor Gas, and SEGCO make short-term borrowings primarily through commercial paper programs that have the liquidity support of the committed bank credit arrangements described above. Short-term borrowings are included in notes payable in the balance sheets.

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Details of short-term borrowings were as follows:
 
Short-term Debt at the End of the Period
 
Short-term Debt During the Period  (*)
 
Amount Outstanding
 
Weighted Average Interest Rate
 
Average Amount Outstanding
 
Weighted Average Interest Rate
 
Maximum Amount Outstanding
 
(in millions)
 
 
 
(in millions)
 
 
 
(in millions)
December 31, 2018:
 
 
 
 
 
 
 
 
 
Commercial paper
$
1,064

 
3.0
%
 
$
1,655

 
2.3
%
 
$
3,042

Short-term bank debt
1,851

 
3.1
%
 
1,722

 
2.9
%
 
2,504

Total
$
2,915

 
3.1
%
 
$
3,377

 
2.6
%
 
 
December 31, 2017:
 
 
 
 
 
 
 
 
 
Commercial paper
$
1,832

 
1.8
%
 
$
2,117

 
1.3
%
 
$
2,946

Short-term bank debt
607

 
2.3
%
 
555

 
2.1
%
 
1,020

Total
$
2,439

 
1.9
%
 
$
2,672

 
1.5
%
 
 
December 31, 2016:
 
 
 
 
 
 
 
 
 
Commercial paper
$
1,909

 
1.1
%
 
$
976

 
0.8
%
 
$
1,970

Short-term bank debt
123

 
1.7
%
 
176

 
1.7
%
 
500

Total
$
2,032

 
1.1
%
 
$
1,152

 
1.1
%
 
 
(*)
Average and maximum amounts are based upon daily balances during the 12-month periods ended December 31, 2018 , 2017 , and 2016 .
In addition to the short-term borrowings of Southern Power Company included in the table above, at December 31, 2016, Southern Power Company subsidiaries assumed credit agreements (Project Credit Facilities) with the acquisition of certain solar facilities, which were non-recourse to Southern Power Company, the proceeds of which were used to finance project costs related to such solar facilities. The Project Credit Facilities were fully repaid in January 2017. For the year ended December 31, 2016, the Project Credit Facilities had a maximum amount outstanding of $828 million and an average amount outstanding of $566 million at a weighted average interest rate of 2.1% and had total amounts outstanding of $209 million at a weighted average interest rate of 2.1% at December 31, 2016.
Southern Company believes the need for working capital can be adequately met by utilizing commercial paper programs, lines of credit, bank term loans, and operating cash flows.
Financing Activities
During 2018 , Southern Company issued approximately 11.6 million shares of common stock primarily through employee equity compensation plans and received proceeds of approximately $442 million .
In addition, during the third and fourth quarters 2018 , Southern Company issued a total of approximately 12.1 million and 2.5 million shares, respectively, of common stock through at-the-market issuances pursuant to sales agency agreements related to Southern Company's continuous equity offering program and received cash proceeds of approximately $540 million and $108 million , respectively, net of $5 million and $1 million in commissions, respectively.

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Southern Company and Subsidiary Companies 2018 Annual Report


The following table outlines the long-term debt financing activities for Southern Company and its subsidiaries for the year ended December 31, 2018:
Company
Senior
Note
Issuances
 
Senior Note
Maturities, Redemptions, and Repurchases
 
Revenue
Bond
Issuances and
Reofferings
of Purchased
Bonds
 
Revenue
Bond
Maturities, Redemptions,
 and Repurchases
 
Other
Long-Term
Debt
Issuances
 
Other
Long-Term
Debt
Redemptions
and
Maturities (a)
 
(in millions)
Southern Company (b)
$
750

 
$
1,000

 
$

 
$

 
$

 
$

Alabama Power
500

 

 
120

 
120

 

 
1

Georgia Power

 
1,500

 
108

 
469

 

 
111

Mississippi Power
600

 
155

 

 
43

 

 
900

Southern Power

 
350

 

 

 

 
420

Southern Company Gas

 
155

 

 
200

 
300

 

Other (c)

 
100

 

 

 
100

 
13

Elimination (d)

 

 

 

 

 
(4
)
Southern Company Consolidated
$
1,850

 
$
3,260

 
$
228

 
$
832

 
$
400

 
$
1,441

(a)
Includes reductions in capital lease obligations resulting from cash payments under capital leases.
(b)
Represents the Southern Company parent entity.
(c)
In November 2018, SEGCO, as borrower, and Alabama Power, as guarantor, entered into a $100 million long-term delayed draw floating rate bank term loan bearing interest based on three-month LIBOR, which SEGCO used to repay at maturity $100 million aggregate principal amount of Series 2013A Senior Notes due December 1, 2018. See Note 9 to the financial statements under " Guarantees " for additional information.
(d)
Represents reductions in affiliate capital lease obligations at Georgia Power, which are eliminated in Southern Company's consolidated financial statements.
Except as otherwise described herein, Southern Company and its subsidiaries used the proceeds of debt issuances for their redemptions and maturities shown in the table above, to repay short-term indebtedness, and for general corporate purposes, including working capital. The subsidiaries also used the proceeds for their construction programs.
In March 2018, Southern Company entered into a $900 million short-term floating rate bank loan bearing interest based on one-month LIBOR, which was repaid in August 2018.
In April 2018, Southern Company borrowed $250 million pursuant to a short-term uncommitted bank credit arrangement, bearing interest at a rate agreed upon by Southern Company and the bank from time to time and payable on no less than 30 days' demand by the bank. Subsequent to December 31, 2018, Southern Company repaid this loan.
In June 2018, Southern Company repaid at maturity two $100 million short-term floating rate bank term loans.
In August 2018, Southern Company issued $750 million aggregate principal amount of Series 2018A Floating Rate Senior Notes due February 14, 2020 bearing interest based on three-month LIBOR, entered into a $1.5 billion short-term floating rate bank loan bearing interest based on one-month LIBOR, and repaid $250 million borrowed in August 2017 pursuant to a short-term uncommitted bank credit arrangement. Subsequent to December 31, 2018, Southern Company repaid the $1.5 billion short-term floating rate bank loan.
In the third quarter 2018, Southern Company repaid at maturity $500 million aggregate principal amount of 1.55% Senior Notes and $500 million aggregate principal amount of Series 2013A 2.45% Senior Notes.
Subsequent to December 31, 2018, through cash tender offers, Southern Company repurchased and retired approximately $522 million of the $1.0 billion aggregate principal amount outstanding of its 1.85% Senior Notes due July 1, 2019 ( 1.85% Notes), approximately $180 million of the $350 million aggregate principal amount outstanding of its Series 2014B 2.15% Senior Notes due September 1, 2019 (Series 2014B Notes), and approximately $504 million of the $750 million aggregate principal amount outstanding of its Series 2018A Floating Rate Notes due February 14, 2020 (Series 2018A Notes), for an aggregate purchase price, excluding accrued and unpaid interest, of approximately $1.2 billion . In addition, subsequent to December 31, 2018, and following the completion of the cash tender offers, Southern Company completed the redemption of all of the Series 2018A Notes remaining outstanding and called for redemption all of the 1.85% Notes and Series 2014B Notes remaining outstanding.

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Subsequent to December 31, 2018, Alabama Power repaid at maturity $200 million aggregate principal amount of Series Z 5.125% Senior Notes.
In January 2018, Georgia Power repaid its outstanding $150 million short-term floating rate bank loan due May 31, 2018.
In May 2018, through cash tender offers, Georgia Power repurchased and retired $89 million of the $250 million aggregate principal amount outstanding of its Series 2007A 5.65% Senior Notes due March 1, 2037, $326 million of the $500 million aggregate principal amount outstanding of its Series 2009A 5.95% Senior Notes due February 1, 2039, and $335 million of the $600 million aggregate principal amount outstanding of its Series 2010B 5.40% Senior Notes due June 1, 2040, for an aggregate purchase price, excluding accrued and unpaid interest, of $902 million.
Subsequent to December 31, 2018, Georgia Power redeemed approximately $13 million, $20 million, and $75 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), First Series 1992, Eighth Series 1994, and Second Series 1995, respectively.
In March 2018, Mississippi Power entered into a $300 million short-term floating rate bank loan bearing interest based on one-month LIBOR, of which $200 million was repaid in the second quarter 2018 and $100 million was repaid in the third quarter 2018. The proceeds of this loan, together with the proceeds of Mississippi Power's $600 million senior notes issuances, were used to repay Mississippi Power's $900 million unsecured floating rate term loan.
In October 2018, Mississippi Power completed the redemption of all 334,210 outstanding shares of its preferred stock (as well as related depositary shares), with an aggregate par value of approximately $33.4 million.
In May 2018, Southern Power entered into two short-term floating rate bank loans, each for an aggregate principal amount of $100 million, which bear interest based on one-month LIBOR. In November 2018, Southern Power repaid one of these short-term loans.
During 2018, Southern Power received approximately $148 million of third-party tax equity related to certain of its renewable facilities. See Note 15 to the financial statements under " Southern Power " for additional information.
Prior to its sale, in the second quarter 2018, Pivotal Utility Holdings caused $200 million aggregate principal amount of gas facility revenue bonds to be redeemed.
In May 2018, Southern Company Gas Capital borrowed $95 million pursuant to a short-term uncommitted bank credit arrangement, guaranteed by Southern Company Gas, bearing interest at a rate agreed upon by Southern Company Gas Capital and the bank from time to time and payable on no less than 30 days' demand by the bank. In July 2018, Southern Company Gas Capital repaid this loan.
Other long-term debt issuances for Southern Company Gas include the issuance by Nicor Gas of $300 million aggregate principal amount of first mortgage bonds in a private placement, of which $100 million was issued in August 2018 and $200 million was issued in November 2018.
In addition to any financings that may be necessary to meet capital requirements and contractual obligations, Southern Company and its subsidiaries plan to continue, when economically feasible, a program to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit.
Credit Rating Risk
At December 31, 2018 , Southern Company and its subsidiaries did not have any credit arrangements that would require material changes in payment schedules or terminations as a result of a credit rating downgrade.
There are certain contracts that could require collateral, but not accelerated payment, in the event of a credit rating change of certain subsidiaries to BBB and/or Baa2 or below. These contracts are for physical electricity and natural gas purchases and sales, fuel purchases, fuel transportation and storage, energy price risk management, transmission, interest rate management, and construction of new generation at Plant Vogtle Units 3 and 4.

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Southern Company and Subsidiary Companies 2018 Annual Report


The maximum potential collateral requirements under these contracts at December 31, 2018 were as follows:
Credit Ratings
Maximum
Potential
Collateral
Requirements (a)
 
(in millions)
At BBB and/or Baa2
$
30

At BBB- and/or Baa3
$
542

At BB+ and/or Ba1 (b)
$
2,176

(a)
Includes potential collateral requirements related to Gulf Power of $111 million and $221 million at a credit rating of BBB- and/or Baa3 and BB+ and/or Ba1, respectively. See Note 15 to the financial statements under " Southern Company's Sale of Gulf Power " for information regarding the sale of Gulf Power on January 1, 2019.
(b)
Any additional credit rating downgrades at or below BB- and/or Ba3 could increase collateral requirements up to an additional $38 million.
Generally, collateral may be provided by a Southern Company guaranty, letter of credit, or cash. Additionally, a credit rating downgrade could impact the ability of Southern Company and its subsidiaries to access capital markets and would be likely to impact the cost at which they do so.
On February 26, 2018, Moody's revised its rating outlook for Mississippi Power from stable to positive. On August 8, 2018, Moody's upgraded Mississippi Power's senior unsecured rating to Baa3 from Ba1 and maintained the positive rating outlook.
On February 28, 2018, Fitch removed Mississippi Power from rating watch negative and revised its rating outlook from stable to positive.
Also on February 28, 2018, Fitch downgraded the senior unsecured long-term debt rating of Southern Company to BBB+ from A- with a stable outlook and of Georgia Power to A from A+ with a negative outlook. On August 9, 2018, Fitch downgraded the senior unsecured long-term debt rating of Georgia Power to A- from A.
On March 14, 2018, S&P upgraded the senior unsecured long-term debt rating of Mississippi Power to A- from BBB+. The outlook remained negative.
On August 8, 2018, Moody's downgraded the senior unsecured debt rating of Georgia Power to Baa1 from A3.
On September 28, 2018, Moody's revised its rating outlooks for Southern Company, Alabama Power, and Georgia Power from negative to stable.
Also on September 28, 2018, Fitch assigned a negative rating outlook to the ratings of Southern Company and its subsidiaries (excluding Mississippi Power).
As a result of the Tax Reform Legislation, certain financial metrics, such as the funds from operations to debt percentage, used by the credit rating agencies to assess Southern Company and its subsidiaries may be negatively impacted. Southern Company and most of its regulated subsidiaries have taken actions to mitigate the resulting impacts, which, among other alternatives, include adjusting capital structure. Absent actions by Southern Company and its subsidiaries that fully mitigate the impacts, the credit ratings of Southern Company and certain of its subsidiaries could be negatively affected. See Note 2 to the financial statements for additional information related to state PSC or other regulatory agency actions related to the Tax Reform Legislation, including approvals of capital structure adjustments for Alabama Power, Georgia Power, and Atlanta Gas Light by their respective state PSCs, which are expected to help mitigate the potential adverse impacts to certain of their credit metrics.
Market Price Risk
The Southern Company system is exposed to market risks, including commodity price risk, interest rate risk, weather risk, and occasionally foreign currency exchange rate risk. To manage the volatility attributable to these exposures, the applicable company nets the exposures, where possible, to take advantage of natural offsets and enters into various derivative transactions for the remaining exposures pursuant to the applicable company's policies in areas such as counterparty exposure and risk management practices. Southern Company Gas' wholesale gas operations use various contracts in its commercial activities that generally meet the definition of derivatives. For the traditional electric operating companies, Southern Power, and Southern Company Gas' other businesses, each company's policy is that derivatives are to be used primarily for hedging purposes and mandates strict adherence to all applicable risk management policies. Derivative positions are monitored using techniques including, but not limited to, market valuation, value at risk, stress testing, and sensitivity analysis.

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Southern Company and Subsidiary Companies 2018 Annual Report


To mitigate future exposure to a change in interest rates, Southern Company and certain of its subsidiaries enter into derivatives that have been designated as hedges. Derivatives that have been designated as hedges outstanding at December 31, 2018 have a notional amount of $2.0 billion and are intended to mitigate interest rate volatility related to existing fixed rate obligations. The weighted average interest rate on $5.8 billion of long-term variable interest rate exposure at December 31, 2018 was 3.02%. If Southern Company sustained a 100 basis point change in interest rates for all long-term variable interest rate exposure, the change would affect annualized interest expense by approximately $58 million at December 31, 2018 . See Note 1 to the financial statements under " Financial Instruments " and Note 14 to the financial statements for additional information.
Southern Power Company had foreign currency denominated debt of €1.1 billion at December 31, 2018 . Southern Power Company has mitigated its exposure to foreign currency exchange rate risk through the use of foreign currency swaps converting all interest and principal payments to fixed-rate U.S. dollars.
Due to cost-based rate regulation and other various cost recovery mechanisms, the traditional electric operating companies and natural gas distribution utilities continue to have limited exposure to market volatility in interest rates, foreign currency exchange rates, commodity fuel prices, and prices of electricity. In addition, Southern Power's exposure to market volatility in commodity fuel prices and prices of electricity is limited because its long-term sales contracts shift substantially all fuel cost responsibility to the purchaser. However, Southern Power has been and may continue to be exposed to market volatility in energy-related commodity prices as a result of uncontracted generating capacity. To mitigate residual risks relative to movements in electricity prices, the traditional electric operating companies and Southern Power may enter into physical fixed-price contracts for the purchase and sale of electricity through the wholesale electricity market and, to a lesser extent, financial hedge contracts for natural gas purchases; however, a significant portion of contracts are priced at market. The traditional electric operating companies and certain of the natural gas distribution utilities manage fuel-hedging programs implemented per the guidelines of their respective state PSCs or other applicable state regulatory agencies. Southern Company had no material change in market risk exposure for the year ended December 31, 2018 when compared to the year ended December 31, 2017 .
The changes in fair value of energy-related derivative contracts are substantially attributable to both the volume and the price of natural gas. For the years ended December 31, the changes in fair value of energy-related derivative contracts, the majority of which are composed of regulatory hedges, were as follows:
 
2018
 
2017
 
(in millions)
Contracts outstanding at the beginning of the period, assets (liabilities), net
$
(163
)
 
$
41

Contracts realized or settled
93

 
(8
)
Current period changes (a)
(131
)
 
(196
)
Contracts outstanding at the end of the period, assets (liabilities), net (b)(c)
$
(201
)
 
$
(163
)
(a)
Current period changes also include the changes in fair value of new contracts entered into during the period, if any.
(b)
Excludes premium and intrinsic value associated with weather derivatives of $8 million and $11 million at December 31, 2018 and 2017 , respectively.
(c)
Includes $6 million of net liabilities related to Gulf Power. See Note 15 to the financial statements under " Southern Company's Sale of Gulf Power " for information regarding the sale of Gulf Power on January 1, 2019.
The net hedge volumes of energy-related derivative contracts were 431 million mmBtu and 621 million mmBtu at December 31, 2018 and 2017 , respectively.
For the traditional electric operating companies and Southern Power, the weighted average swap contract cost above market prices was approximately $0.12 per mmBtu at December 31, 2018 and $0.15 per mmBtu at December 31, 2017 . The majority of the natural gas hedge gains and losses are recovered through the traditional electric operating companies' fuel cost recovery clauses.
At December 31, 2018 and 2017 , a portion of the Southern Company system's energy-related derivative contracts were designated as regulatory hedges and were related to the applicable company's fuel-hedging program. Therefore, gains and losses are initially recorded as regulatory liabilities and assets, respectively, and then are included in fuel expense as they are recovered through the energy cost recovery clause. Certain other gains and losses on energy-related derivatives, designated as cash flow hedges, are initially deferred in OCI before being recognized in income in the same period as the hedged transaction. Gains and losses on energy-related derivative contracts that are not designated or fail to qualify as hedges are recognized in the statements of income as incurred. See Note 14 to the financial statements for additional information.
The Southern Company system uses exchange-traded market-observable contracts, which are categorized as Level 1 of the fair value hierarchy, and over-the-counter contracts that are not exchange traded but are fair valued using prices which are market

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Southern Company and Subsidiary Companies 2018 Annual Report


observable, and thus fall into Level 2 of the fair value hierarchy. See Note 13 to the financial statements for further discussion of fair value measurements. The maturities of the energy-related derivative contracts at December 31, 2018 were as follows:
 
Fair Value Measurements
 
December 31, 2018
 
Total
Fair Value
 
Maturity
 
 
Year 1
 
Years 2&3
 
Years 4&5
 
(in millions)
Level 1
$
(179
)
 
$
(59
)
 
$
(86
)
 
$
(34
)
Level 2
(22
)
 
20

 
(17
)
 
(25
)
Level 3

 

 

 

Fair value of contracts outstanding at end of period
$
(201
)
 
$
(39
)
 
$
(103
)
 
$
(59
)
The Southern Company system is exposed to market price risk in the event of nonperformance by counterparties to energy-related and interest rate derivative contracts. The Southern Company system only enters into agreements and material transactions with counterparties that have investment grade credit ratings by Moody's and S&P, or with counterparties who have posted collateral to cover potential credit exposure. Therefore, the Southern Company system does not anticipate market risk exposure from nonperformance by the counterparties. For additional information, see Note 1 to the financial statements under " Financial Instruments " and Note 14 to the financial statements.
With the exception of Southern Company Gas' subsidiary, Atlanta Gas Light, and the Southern Company Gas wholesale gas services business, the Southern Company system is not exposed to concentrations of credit risk. Concentration of credit risk occurs at Atlanta Gas Light for amounts billed for services and other costs to its customers, which consist of 15 Marketers in Georgia responsible for the retail sale of natural gas to end-use customers in Georgia. For 2018 , the four largest Marketers based on customer count, which includes SouthStar, accounted for 20% of Southern Company Gas' adjusted operating margin. Southern Company Gas' wholesale gas services business has a concentration of credit risk for services it provides to its counterparties as measured by its 30-day receivable exposure plus forward exposure. At December 31, 2018 , Southern Company Gas' wholesale gas services business' top 20 counterparties represented approximately 48% , or $298 million , of its total counterparty exposure and had a weighted average S&P equivalent credit rating of A-, all of which is consistent with the prior year.
Southern Company performs periodic reviews of its leveraged lease transactions, both domestic and international, and the creditworthiness of the lessees, including a review of the value of the underlying leased assets and the credit ratings of the lessees. Southern Company's domestic lease transactions generally do not have any credit enhancement mechanisms; however, the lessees in its international lease transactions have pledged various deposits as additional security to secure the obligations. The lessees in Southern Company's international lease transactions are also required to provide additional collateral in the event of a credit downgrade below a certain level.
Capital Requirements and Contractual Obligations
The Southern Company system's construction program is currently estimated to total approximately $8.0 billion for 2019 , $7.7 billion for 2020 , $6.7 billion for 2021 , $6.3 billion for 2022 , and $6.0 billion for 2023 . These amounts include expenditures of approximately $1.5 billion , $1.2 billion , $1.0 billion , and $0.5 billion for the construction of Plant Vogtle Units 3 and 4 in 2019 , 2020 , 2021 , and 2022 , respectively. These amounts do not include up to approximately $0.5 billion per year on average for 2019 through 2023 for Southern Power's planned expenditures for plant acquisitions and placeholder growth. These amounts also include capital expenditures related to contractual purchase commitments for nuclear fuel and capital expenditures covered under LTSAs. Estimated capital expenditures to comply with environmental laws and regulations included in these amounts are $0.5 billion , $0.2 billion , $0.3 billion , $0.3 billion , and $0.2 billion for 2019 , 2020 , 2021 , 2022 , and 2023 , respectively. These estimated expenditures do not include any potential compliance costs associated with pending regulation of CO 2 emissions from fossil fuel-fired electric generating units. See FUTURE EARNINGS POTENTIAL – " Environmental Matters Environmental Laws and Regulations " and " – Global Climate Issues " herein for additional information.
The traditional electric operating companies also anticipate costs associated with closure and monitoring of ash ponds in accordance with the CCR Rule, which are reflected in Southern Company's ARO liabilities. These costs, which are expected to change and could change materially as underlying assumptions are refined and the cost and the method and timing of compliance activities continue to be evaluated, are currently estimated to be approximately $0.5 billion , $0.5 billion , $0.7 billion , $0.9 billion , and $0.9 billion for 2019 , 2020 , 2021 , 2022 , and 2023 , respectively. See FUTURE EARNINGS POTENTIAL – " Environmental

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Matters Environmental Laws and Regulations Coal Combustion Residuals " herein and Note 6 to the financial statements for additional information.
The construction programs are subject to periodic review and revision, and actual construction costs may vary from these estimates because of numerous factors. These factors include: changes in business conditions; changes in load projections; changes in environmental laws and regulations; the outcome of any legal challenges to environmental rules; changes in electric generating plants, including unit retirements and replacements and adding or changing fuel sources at existing electric generating units, to meet regulatory requirements; changes in FERC rules and regulations; state regulatory agency approvals; changes in the expected environmental compliance program; changes in legislation; the cost and efficiency of construction labor, equipment, and materials; project scope and design changes; storm impacts; and the cost of capital. In addition, there can be no assurance that costs related to capital expenditures will be fully recovered. Additionally, planned expenditures for plant acquisitions may vary due to market opportunities and Southern Power's ability to execute its growth strategy. See Note 15 to the financial statements under " Southern Power " for additional information regarding Southern Power's plant acquisitions.
The construction program also includes Plant Vogtle Units 3 and 4, which includes components based on new technology that only recently began initial operation in the global nuclear industry at this scale and which may be subject to additional revised cost estimates during construction. The ability to control costs and avoid cost and schedule overruns during the development, construction, and operation of new facilities is subject to a number of factors, including, but not limited to, changes in labor costs, availability, and productivity; challenges with management of contractors, subcontractors, or vendors; adverse weather conditions; shortages, increased costs, or inconsistent quality of equipment, materials, and labor; contractor or supplier delay; non-performance under construction, operating, or other agreements; operational readiness, including specialized operator training and required site safety programs; engineering or design problems; design and other licensing-based compliance matters, including the timely resolution of ITAAC and the related approvals by the NRC; challenges with start-up activities, including major equipment failure and system integration; and/or operational performance. See Note 2 to the financial statements under " Georgia Power Nuclear Construction " for information regarding Plant Vogtle Units 3 and 4 and additional factors that may impact construction expenditures.
As a result of NRC requirements, Alabama Power and Georgia Power have external trust funds for nuclear decommissioning costs; however, Alabama Power currently has no additional funding requirements. For additional information, see Note 6 to the financial statements under " Nuclear Decommissioning ."
In addition, as discussed in Note 11 to the financial statements, the Southern Company system provides postretirement benefits to the majority of its employees and funds trusts to the extent required by PSCs, other applicable state regulatory agencies, or the FERC.
Funding requirements related to obligations associated with scheduled maturities of long-term debt, as well as the related interest, derivative obligations, preferred stock dividends of subsidiaries, leases, pipeline charges, storage capacity, gas supply, asset management agreements, other purchase commitments, ARO settlements, and trusts are detailed in the contractual obligations table that follows. See Notes 1 , 6 , 8 , 9 , 11 , and 14 to the financial statements for additional information.

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Southern Company and Subsidiary Companies 2018 Annual Report


Contractual Obligations
The Southern Company system's contractual obligations at December 31, 2018 (excluding Gulf Power) were as follows:
 
2019
 
2020- 2021
 
2022- 2023
 
After 2023
 
Total
 
(in millions)
Long-term debt (a)  —
 
 
 
 
 
 
 
 
 
Principal
$
3,133

 
$
7,204

 
$
4,354

 
$
28,950

 
$
43,641

Interest
1,668

 
3,082

 
2,270

 
25,796

 
32,816

Preferred stock dividends of subsidiaries (b)
15

 
29

 
29

 

 
73

Financial derivative obligations (c)
610

 
243

 
109

 

 
962

Operating leases (d)
156

 
244

 
177

 
1,040

 
1,617

Capital leases (d)
25

 
22

 
8

 
143

 
198

Pipeline charges, storage capacity, and gas supply (e)
781

 
1,104

 
901

 
1,871

 
4,657

Asset management agreements (f)
10

 
8

 

 

 
18

Purchase commitments  
 
 
 
 
 
 
 
 


Capital (g)
7,600

 
13,608

 
11,486

 

 
32,694

Fuel (h)
3,168

 
3,854

 
1,863

 
5,862

 
14,747

Purchased power (i)
304

 
653

 
545

 
2,494

 
3,996

Other (j)
328

 
642

 
464

 
2,265

 
3,699

ARO settlements (k)
451

 
1,186

 
1,841

 

 
3,478

Trusts —
 
 
 
 
 
 
 
 


Nuclear decommissioning (l)
5

 
11

 
11

 
88

 
115

Pension and other postretirement benefit plans (m)
137

 
265

 

 

 
402

Total
$
18,391

 
$
32,155

 
$
24,058

 
$
68,509

 
$
143,113

(a)
All amounts are reflected based on final maturity dates except for amounts related to FFB borrowings and certain revenue bonds. As it relates to the FFB borrowings, the final maturity date is February 20, 2044; however, principal amortization is reflected beginning in 2020. See Note 8 to the financial statements under " Long-term Debt DOE Loan Guarantee Borrowings " and " Securities Due Within One Year " for additional information. Southern Company and its subsidiaries plan to continue, when economically feasible, to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit. Variable rate interest obligations are estimated based on rates at December 31, 2018 , as reflected in the statements of capitalization. Fixed rates include, where applicable, the effects of interest rate derivatives employed to manage interest rate risk. Long-term debt excludes capital lease amounts (shown separately).
(b)
Represents preferred stock of Alabama Power. Preferred stock does not mature; therefore, amounts are provided for the next five years only.
(c)
See Notes 1 and 14 to the financial statements.
(d)
Excludes PPAs that are accounted for as leases and included in "Purchased power."
(e)
Includes charges recoverable through a natural gas cost recovery mechanism, or alternatively billed to Marketers selling retail natural gas, and demand charges associated with Southern Company Gas' wholesale gas services. The gas supply balance includes amounts for gas commodity purchase commitments associated with Southern Company Gas' gas marketing services of 47 million mmBtu at floating gas prices calculated using forward natural gas prices at December 31, 2018 and valued at $150 million . Southern Company Gas provides guarantees to certain gas suppliers for certain of its subsidiaries in support of payment obligations.
(f)
Represents fixed-fee minimum payments for asset management agreements associated with wholesale gas services.
(g)
The Southern Company system provides estimated capital expenditures for a five-year period, including capital expenditures associated with environmental regulations. These amounts exclude contractual purchase commitments for nuclear fuel, capital expenditures covered under LTSAs, and estimated capital expenditures for AROs, which are reflected in "Fuel," "Other," and "ARO settlements," respectively. These amounts also exclude up to approximately $0.5 billion per year on average for 2019 through 2023 for Southern Power's planned expenditures for plant acquisitions and placeholder growth. At December 31, 2018 , significant purchase commitments were outstanding in connection with the construction program. See FUTURE EARNINGS POTENTIAL – " Environmental Matters Environmental Laws and Regulations " and "Construction Programs" herein for additional information.
(h)
Primarily includes commitments to purchase coal, nuclear fuel, and natural gas, as well as the related transportation and storage. In most cases, these contracts contain provisions for price escalation, minimum purchase levels, and other financial commitments. Natural gas purchase commitments are based on various indices at the time of delivery. Amounts reflected for natural gas purchase commitments have been estimated based on the NYMEX future prices at December 31, 2018 .
(i)
Estimated minimum long-term obligations for various PPA purchases from gas-fired, biomass, and wind-powered facilities and capacity payments related to Plant Vogtle Units 1 and 2. See Note 9 to the financial statements under " Fuel and Power Purchase Agreements " for additional information.

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Southern Company and Subsidiary Companies 2018 Annual Report


(j)
Includes LTSAs, contracts for the procurement of limestone, contractual environmental remediation liabilities, and operation and maintenance agreements. LTSAs include price escalation based on inflation indices.
(k)
Represents estimated costs for a five-year period associated with closing and monitoring ash ponds in accordance with the CCR Rule and the related state rules, which are reflected in Southern Company's ARO liabilities. Material expenditures in future years for ARO settlements also will be required for ash ponds, nuclear decommissioning, and other liabilities reflected in Southern Company's AROs. See FUTURE EARNINGS POTENTIAL – " Environmental Matters Environmental Laws and Regulations Coal Combustion Residuals " herein and Note 6 to the financial statements for additional information.
(l)
Projections of nuclear decommissioning trust fund contributions for Plant Hatch and Plant Vogtle Units 1 and 2 are based on the 2013 ARP for Georgia Power. Alabama Power also has external trust funds for nuclear decommissioning costs; however, Alabama Power currently has no additional funding requirements. See Note 6 to the financial statements under "Nuclear Decommissioning" for additional information.
(m)
The Southern Company system forecasts contributions to the pension and other postretirement benefit plans over a three-year period. Southern Company anticipates no mandatory contributions to the qualified pension plans during the next three years. Amounts presented represent estimated benefit payments for the nonqualified pension plans, estimated non-trust benefit payments for the other postretirement benefit plans, and estimated contributions to the other postretirement benefit plan trusts, all of which will be made from corporate assets of Southern Company's subsidiaries. See Note 11 to the financial statements for additional information related to the pension and other postretirement benefit plans, including estimated benefit payments. Certain benefit payments will be made through the related benefit plans. Other benefit payments will be made from corporate assets of Southern Company's subsidiaries.

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MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
Alabama Power Company 2018 Annual Report



OVERVIEW
Business Activities
Alabama Power operates as a vertically integrated utility providing electric service to retail and wholesale customers within its traditional service territory located in the State of Alabama in addition to wholesale customers in the Southeast.
Many factors affect the opportunities, challenges, and risks of Alabama Power's business of providing electric service. These factors include the ability to maintain a constructive regulatory environment, to maintain and grow energy sales and customers, and to effectively manage and secure timely recovery of costs. These costs include those related to projected long-term demand growth, stringent environmental standards, including CCR rules, reliability, fuel, capital expenditures, including improving the electric transmission and distribution systems, and restoration following major storms. Alabama Power has various regulatory mechanisms that operate to address cost recovery. Effectively operating pursuant to these regulatory mechanisms and appropriately balancing required costs and capital expenditures with customer prices will continue to challenge Alabama Power for the foreseeable future. On May 1, 2018, the Alabama PSC approved modifications to Rate RSE and other commitments designed to position Alabama Power to address the retail rate impact and the growing pressure on its credit quality resulting from the Tax Reform Legislation. See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters" and FINANCIAL CONDITION AND LIQUIDITY – "Credit Rating Risk" herein for additional information.
Alabama Power continues to focus on several key performance indicators including, but not limited to, customer satisfaction, plant availability, system reliability, and net income after dividends on preferred stock. Alabama Power's financial success is directly tied to customer satisfaction. Key elements of ensuring customer satisfaction include outstanding service, high reliability, and competitive prices. Management uses customer satisfaction surveys to evaluate Alabama Power's results and generally targets the top quartile of these surveys in measuring performance.
See RESULTS OF OPERATIONS herein for information on Alabama Power's financial performance.
Earnings
Alabama Power's 2018 net income after dividends on preferred and preference stock was $930 million , representing an $82 million , or 9.7% , increase over the previous year. The increase was primarily due to a decrease in income tax expense, partially offset by a decrease in retail revenues associated with customer bill credits related to the Tax Reform Legislation. The increase also reflects an increase in revenues associated with colder weather in the first quarter 2018 and warmer weather in the second and third quarters 2018 compared to the corresponding periods in 2017, partially offset by an accrual for a Rate RSE refund. See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Rate RSE" herein for additional information.
Alabama Power's 2017 net income after dividends on preferred and preference stock was $848 million , representing a $26 million, or 3.2%, increase over the previous year. The increase was primarily due to an increase in rates under Rate RSE effective in January 2017 and the impact of a Rate RSE refund recorded in 2016. These increases to income were partially offset by a decrease in retail revenues associated with milder weather, lower customer usage, and an increase in non-fuel operations and maintenance expenses in 2017 as compared to 2016. See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Rate RSE" herein for additional information.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2018 Annual Report

RESULTS OF OPERATIONS
A condensed income statement for Alabama Power follows:
 
Amount
 
Increase (Decrease)
from Prior Year
 
2018
 
2018
 
2017
 
(in millions)
Operating revenues
$
6,032

 
$
(7
)
 
$
150

Fuel
1,301

 
76

 
(72
)
Purchased power
432

 
104

 
(6
)
Other operations and maintenance
1,669

 
(40
)
 
152

Depreciation and amortization
764

 
28

 
33

Taxes other than income taxes
389

 
5

 
4

Total operating expenses
4,555

 
173

 
111

Operating income
1,477

 
(180
)
 
39

Allowance for equity funds used during construction
62

 
23

 
11

Interest expense, net of amounts capitalized
323

 
18

 
3

Other income (expense), net
20

 
(23
)
 
17

Income taxes
291

 
(277
)
 
37

Net income
945

 
79

 
27

Dividends on preferred and preference stock
15

 
(3
)
 
1

Net income after dividends on preferred and preference stock
$
930

 
$
82

 
$
26

Operating Revenues
Operating revenues for 2018 were $6.0 billion , reflecting a $7 million decrease from 2017. Details of operating revenues were as follows:
 
2018
 
2017
 
(in millions)
Retail — prior year
$
5,458

 
$
5,322

Estimated change resulting from —
 
 
 
Rates and pricing
(354
)
 
362

Sales decline
(10
)
 
(44
)
Weather
137

 
(89
)
Fuel and other cost recovery
136

 
(93
)
Retail — current year
5,367

 
5,458

Wholesale revenues —
 
 
 
Non-affiliates
279

 
276

Affiliates
119

 
97

Total wholesale revenues
398

 
373

Other operating revenues
267

 
208

Total operating revenues
$
6,032

 
$
6,039

Percent change
(0.1
)%
 
2.6
%
Retail revenues in 2018 were $5.4 billion . These revenues decreased $ 91 million , or 1.7% , in 2018 as compared to the prior year. The decrease in 2018 was primarily due to customer bill credits related to the Tax Reform Legislation and an accrual for a Rate RSE refund, partially offset by an increase in fuel revenues and colder weather in the first quarter and warmer weather in the second and third quarters 2018 as compared to the corresponding periods in 2017.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2018 Annual Report

Retail revenues in 2017 were $5.5 billion. These revenues increased $136 million , or 2.6% , in 2017 as compared to the prior year. The increase in 2017 was primarily due to an increase in rates under Rate RSE effective in January 2017, partially offset by a decrease in fuel revenues and milder weather in the first and third quarters 2017 as compared to the corresponding periods in 2016.
See Note 2 to the financial statements under "Alabama Power – Rate RSE" for additional information. See "Energy Sales" herein for a discussion of changes in the volume of energy sold, including changes related to sales decline and weather.
Electric rates include provisions to recognize the recovery of fuel costs, purchased power costs, PPAs certificated by the Alabama PSC, and costs associated with the natural disaster reserve. Under these provisions, fuel and other cost recovery revenues generally equal fuel and other cost recovery expenses and do not affect net income. See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Rate ECR" herein for additional information.
Wholesale revenues from power sales to non-affiliated utilities were as follows:
 
2018
 
2017
 
2016
 
(in millions)
Capacity and other
$
101

 
$
96

 
$
93

Energy
178

 
180

 
190

Total non-affiliated
$
279

 
$
276

 
$
283

Wholesale revenues from sales to non-affiliates will vary depending on fuel prices, the market prices of wholesale energy compared to the cost of Alabama Power's and the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and availability of the Southern Company system's generation. Increases and decreases in energy revenues that are driven by fuel prices are accompanied by an increase or decrease in fuel costs and do not affect net income. Short-term opportunity energy sales are also included in wholesale energy sales to non-affiliates. These opportunity sales are made at market-based rates that generally provide a margin above Alabama Power's variable cost to produce the energy.
In 2018, wholesale revenues from sales to non-affiliates increased $ 3 million , or 1.1% , as compared to the prior year. In 2017, wholesale revenues from sales to non-affiliates decreased $7 million, or 2.5%, as compared to the prior year.
Wholesale revenues from sales to affiliated companies will vary depending on demand and the availability and cost of generating resources at each company. These affiliate sales and purchases are made in accordance with the IIC, as approved by the FERC. These transactions do not have a significant impact on earnings since this energy is generally sold at marginal cost and energy purchases are generally offset by energy revenues through Alabama Power's energy cost recovery clause.
In 2018, wholesale revenues from sales to affiliates increased $22 million , or 22.7% , as compared to the prior year. In 2018, the price of energy increased 12.3% as a result of higher natural gas prices and KWH sales increased 10.0% primarily due to an increase in hydro generation. In 2017, wholesale revenues from sales to affiliates increased $28 million, or 40.6%, as compared to the prior year. In 2017, KWH sales increased 31.1% as a result of supporting Southern Company system transmission reliability and a 6.9% increase in the price of energy primarily due to higher natural gas prices.
In 2018, other operating revenues increased $59 million , or 28.4% , as compared to the prior year primarily due to revenues related to unregulated sales of products and services that were reclassified as other revenues as a result of the adoption of ASC 606, Revenue from Contracts with Customers (ASC 606). In prior periods, these revenues were included in other income (expense), net. See Note 1 to the financial statements for additional information regarding Alabama Power's adoption of ASC 606. This increase was partially offset by decreases in open access transmission tariff revenues primarily due to a lower rate related to the Tax Reform Legislation.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2018 Annual Report

Energy Sales
Changes in revenues are influenced heavily by the change in the volume of energy sold from year to year. KWH sales for 2018 and the percent change from the prior year were as follows:
 
Total
KWHs
 
Total KWH
Percent Change
 
Weather-Adjusted
Percent Change
 
2018
 
2018
 
2017
 
2018
 
2017
 
(in billions)
 
 
 
 
 
 
 
 
Residential
18.6

 
8.2
%
 
(6.1
)%
 
(0.4
)%
 
(1.2
)%
Commercial
13.9

 
1.9

 
(3.4
)
 
(1.0
)
 
(1.3
)
Industrial
23.0

 
1.4

 
1.7

 
1.4

 
1.7

Other
0.2

 
(5.7
)
 
(5.0
)
 
(5.7
)
 
(5.0
)
Total retail
55.7

 
3.7

 
(2.3
)
 
0.2
 %
 
(0.1
)%
Wholesale
 
 
 
 
 
 
 
 
 
Non-affiliates
5.0

 
(8.7
)
 
(6.5
)
 
 
 
 
Affiliates
4.6

 
9.6

 
31.1

 
 
 
 
Total wholesale
9.6

 
(0.9
)
 
6.6

 
 
 
 
Total energy sales
65.3

 
3.0
%
 
(1.0
)%
 
 
 
 
Changes in retail energy sales are generally the result of changes in electricity usage by customers, changes in weather, and changes in the number of customers. Retail energy sales in 2018 were 3.7% higher than in 2017. Residential sales and commercial sales increased 8.2% and 1.9% in 2018, respectively, primarily due to colder weather in the first quarter and warmer weather in the second and third quarters 2018 as compared to the corresponding periods in 2017. Weather-adjusted residential sales were 0.4% lower in 2018 primarily due to lower customer usage resulting from an increase in penetration of energy-efficient residential appliances. Weather-adjusted commercial sales were 1.0% lower in 2018 primarily due to lower customer usage resulting from customer initiatives in energy savings and an ongoing migration to the electronic commerce business model. Industrial sales increased 1.4% in 2018 as compared to 2017 as a result of an increase in demand resulting from changes in production levels primarily in the primary metals, pipelines, and mining sectors offset by the paper sector.
Retail energy sales in 2017 were 2.3% lower than in 2016. Residential sales and commercial sales decreased 6.1% and 3.4% in 2017, respectively, primarily due to milder weather in the first and third quarters 2017 as compared to the corresponding periods in 2016. Weather-adjusted residential sales were 1.2% lower in 2017 primarily due to lower customer usage resulting from an increase in penetration of energy-efficient residential appliances, partially offset by customer growth. Weather-adjusted commercial sales were 1.3% lower in 2017 primarily due to lower customer usage resulting from customer initiatives in energy savings and an ongoing migration to the electronic commerce business model, partially offset by customer growth. Industrial sales increased 1.7% in 2017 as compared to 2016 as a result of an increase in demand resulting from changes in production levels primarily in the primary metals, chemicals, and mining sectors offset by the pipelines and paper sectors.
See "Operating Revenues" above for a discussion of significant changes in wholesale revenues from sales to non-affiliates and wholesale revenues from sales to affiliated companies related to changes in price and KWH sales.
Fuel and Purchased Power Expenses
The mix of fuel sources for generation of electricity is determined primarily by the unit cost of fuel consumed, demand, and the availability of generating units. Additionally, Alabama Power purchases a portion of its electricity needs from the wholesale market.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2018 Annual Report

Details of Alabama Power's generation and purchased power were as follows:
 
2018
 
2017
 
2016
Total generation (in billions of KWHs)
60.5

 
60.3

 
60.2

Total purchased power (in billions of KWHs)
8.1

 
6.4

 
7.1

Sources of generation (percent)  —
 
 
 
 
 
Coal
50

 
50

 
53

Nuclear
23

 
24

 
23

Gas
19

 
20

 
19

Hydro
8

 
6

 
5

Cost of fuel, generated (in cents per net KWH)  —
 
 
 
 
 
Coal
2.73

 
2.60

 
2.75

Nuclear
0.77

 
0.75

 
0.78

Gas
2.84

 
2.72

 
2.67

Average cost of fuel, generated (in cents per net KWH) (a)(b)
2.26

 
2.14

 
2.26

Average cost of purchased power (in cents per net KWH) (c)
5.47

 
5.29

 
4.80

(a)
For 2018, cost of fuel, generated and average cost of fuel, generated excludes a $30 million adjustment associated with a May 2018 Alabama PSC accounting order related to excess deferred income taxes. See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Tax Reform Accounting Order" herein for additional information.
(b)
KWHs generated by hydro are excluded from the average cost of fuel, generated.
(c)
Average cost of purchased power includes fuel, energy, and transmission purchased by Alabama Power for tolling agreements where power is generated by the provider.
Fuel and purchased power expenses were $1.73 billion in 2018, an increase of $180 million , or 11.6% , compared to 2017. The increase was primarily due to an $81 million net increase related to the volume of KWHs purchased and generated, a $54 million increase in the average cost of fuel, and a $15 million increase in the average cost of purchased power.
In addition, fuel expense increased $30 million in 2018 as a result of an Alabama PSC accounting order authorizing the amortization of a regulatory liability to offset under recovered fuel costs. See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Tax Reform Accounting Order" herein for additional information.
Fuel and purchased power expenses were $1.55 billion in 2017, a decrease of $78 million, or 4.8%, compared to 2016. The decrease was primarily due to a $67 million net decrease related to the volume of KWHs generated and purchased and a $42 million decrease in the average cost of fuel, partially offset by a $31 million increase in the average cost of purchased power.
Fuel and purchased power energy transactions do not have a significant impact on earnings, since energy expenses are generally offset by energy revenues through Alabama Power's energy cost recovery clause. Alabama Power, along with the Alabama PSC, continuously monitors the under/over recovered balance to determine whether adjustments to billing rates are required. See Note 2 to the financial statements under "Alabama Power – Rate ECR" for additional information.
Fuel
Fuel expenses were $1.3 billion in 2018, an increase of $76 million , or 6.2% , compared to 2017. The increase was primarily due to a 5.0% increase in the average cost of KWHs generated by coal and a 4.4% increase in the average cost of KWHs generated by natural gas, which excludes tolling agreements. These increases were partially offset by a 28.3% increase in the volume of KWHs generated by hydro and a 2.1% decrease in the volume of KWHs generated by natural gas. Fuel expenses were $1.2 billion in 2017, a decrease of $72 million, or 5.6%, compared to 2016. The decrease was primarily due to a 12.2% increase in the volume of KWHs generated by hydro, a 5.8% decrease in the volume of KWHs generated by coal, and a 5.5% and 3.9% decrease in the average cost of KWHs generated by coal and nuclear fuel, respectively. These decreases were partially offset by an 8.1% increase in the volume of KWHs generated by nuclear fuel and a 4.0% increase in the volume of KWHs generated by natural gas.
In addition, fuel expense increased $30 million in 2018 as a result of an Alabama PSC accounting order authorizing the amortization of a regulatory liability to offset under recovered fuel costs. See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Tax Reform Accounting Order" herein for additional information.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2018 Annual Report

Purchased Power Non-Affiliates
Purchased power expense from non-affiliates was $216 million in 2018, an increase of $46 million , or 27.1% , compared to 2017. This increase was primarily due to an 18.9% increase in the amount of energy purchased due to colder weather in the first quarter and warmer weather in the second and third quarters 2018 as compared to the corresponding periods in 2017 and a 6.6% increase in the average cost per KWH purchased due to higher natural gas prices. Purchased power expense from non-affiliates was $170 million in 2017, an increase of $4 million, or 2.4%, compared to 2016.
Energy purchases from non-affiliates will vary depending on the market prices of wholesale energy as compared to the cost of the Southern Company system's generation, demand for energy within the Southern Company system's service territory, and the availability of the Southern Company system's generation.
Purchased Power Affiliates
Purchased power expense from affiliates was $216 million in 2018, an increase of $58 million , or 36.7% , compared to 2017. This increase was primarily due to a 34.5% increase in the amount of energy purchased due to colder weather in the first quarter and warmer weather in the second and third quarters 2018 as compared to the corresponding periods in 2017 and a 1.4% increase in the average cost per KWH purchased due to higher natural gas prices. Purchased power expense from affiliates was $158 million in 2017, a decrease of $10 million, or 6.0%, compared to 2016. This decrease was primarily due to a 17.2% decrease in the amount of energy purchased due to milder weather partially offset by a 13.9% increase in the average cost per KWH purchased due to higher natural gas prices.
Energy purchases from affiliates will vary depending on demand for energy and the availability and cost of generating resources at each company within the Southern Company system. These purchases are made in accordance with the IIC or other contractual agreements, as approved by the FERC.
Other Operations and Maintenance Expenses
In 2018, other operations and maintenance expenses decreased $40 million , or 2.3% , as compared to the prior year. Generation costs decreased $34 million primarily due to fewer outages resulting in lower costs. Employee benefit costs, including pension costs, decreased $26 million primarily due to lower active medical costs. Customer service costs decreased $10 million primarily due to cost-saving initiatives. These decreases were partially offset by a $47 million increase in expenses from unregulated sales of products and services that were reclassified as other operations and maintenance expenses as a result of the adoption of ASC 606. In prior periods, these expenses were included in other income (expense), net. See Note 1 to the financial statements under "Revenue" for additional information.
In 2017, other operations and maintenance expenses increased $152 million, or 9.8%, as compared to the prior year. Distribution and transmission expenses increased $58 million primarily due to vegetation management expenses. Generation costs increased $38 million primarily due to outage costs. Employee benefit costs, including pension costs, increased $32 million.
See Note 11 to the financial statements under "Pension Plans" for additional information.
Depreciation and Amortization
Depreciation and amortization increased $28 million , or 3.8% , in 2018 as compared to the prior year primarily due to additional plant in service related to distribution, transmission, compliance-related steam, and other generation production projects. Depreciation and amortization increased $33 million, or 4.7%, in 2017 as compared to the prior year primarily due to additional plant in service and an increase in generation-related depreciation rates, effective January 1, 2017, associated with compliance-related steam projects and ARO recovery, partially offset by a decrease in distribution-related depreciation rates. See Note 5 to the financial statements under "Depreciation and Amortization" for additional information.
Allowance for Equity Funds Used During Construction
AFUDC equity increased $23 million , or 59.0% , in 2018 as compared to the prior year. The increase was primarily associated with steam and transmission construction projects. AFUDC equity increased $11 million, or 39.3%, in 2017 as compared to the prior year. The increase was primarily associated with steam, transmission, and nuclear construction projects. See Note 1 to financial statements under "Allowance for Funds Used During Construction" for additional information.
Interest Expense, Net of Amounts Capitalized
Interest expense, net of amounts capitalized increased $18 million , or 5.9% , in 2018 as compared to the prior year primarily due to an increase in debt outstanding and higher interest rates, partially offset by an increase in the amounts capitalized. Interest

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2018 Annual Report

expense, net of amounts capitalized increased $3 million, or 1.0%, in 2017 as compared to the prior year. See FUTURE EARNINGS POTENTIAL – "Financing Activities" herein for additional information.
Other Income (Expense), Net
Other income (expense), net decreased $23 million , or 53.5% , in 2018 as compared to the prior year primarily due to an increase in charitable donations and the reclassification of revenues and expenses associated with unregulated sales of products and services to other revenues and operations and maintenance expenses, respectively, as a result of the adoption of ASC 606. See Note 1 to the financial statements under "Revenue" for additional information. Other income (expense), net increased $17 million, or 65.4%, in 2017 as compared to the prior year primarily due to increases in unregulated lighting services and a decrease in the non-service cost components of net periodic pension and other postretirement benefits costs. See Note 1 to the financial statements under " Recently Adopted Accounting Standards " and Note 11 to the financial statements for additional information on net periodic pension and other postretirement benefit costs.
Income Taxes
Income taxes decreased $277 million , or 48.8% , in 2018 as compared to the prior year primarily due to the reduction in the federal income tax rate, the benefit from the flowback of excess deferred income taxes as a result of the Tax Reform Legislation, and lower pre-tax earnings. Income taxes increased $37 million, or 7.0%, in 2017 as compared to the prior year primarily due to higher pre-tax earnings, an increase related to prior year tax return actualization, and an increase in income tax reserves, partially offset by an increase in state income tax credits. The impact to net income as a result of the Tax Reform Legislation was not material due to the application of regulatory accounting. See FUTURE EARNINGS POTENTIAL – "Income Tax Matters – Federal Tax Reform Legislation " herein and Note 10 to the financial statements for additional information.
Effects of Inflation
Alabama Power is subject to rate regulation that is generally based on the recovery of historical and projected costs. The effects of inflation can create an economic loss since the recovery of costs could be in dollars that have less purchasing power. Any adverse effect of inflation on Alabama Power's results of operations has not been substantial in recent years. See Note 2 to the financial statements under "Alabama Power – Rate RSE" for additional information.
FUTURE EARNINGS POTENTIAL
General
Alabama Power operates as a vertically integrated utility providing electric service to retail and wholesale customers within its traditional service territory located in the State of Alabama and to wholesale customers in the Southeast. Prices for electric service provided by Alabama Power to retail customers are set by the Alabama PSC under cost-based regulatory principles. Retail rates and earnings are reviewed and may be adjusted periodically within certain limitations. Prices for wholesale electric service, interconnecting transmission lines, and the exchange of electric power are regulated by the FERC. See ACCOUNTING POLICIES – "Application of Critical Accounting Policies and Estimates – Utility Regulation" herein and Note 2 to the financial statements under "Alabama Power" for additional information about regulatory matters.
The results of operations for the past three years are not necessarily indicative of future earnings potential. The level of Alabama Power's future earnings depends on numerous factors that affect the opportunities, challenges, and risks of Alabama Power's primary business of providing electric service. These factors include Alabama Power's ability to maintain a constructive regulatory environment that continues to allow for the timely recovery of prudently-incurred costs during a time of increasing costs and the weak pace of growth in new customers and electricity use per customer, especially in residential and commercial markets. Earnings will also depend upon maintaining and growing sales, considering, among other things, the adoption and/or penetration rates of increasingly energy-efficient technologies and increasing volumes of electronic commerce transactions, both of which could contribute to a net reduction in customer usage. Earnings are subject to a variety of other factors. These factors include weather, competition, new energy contracts with other utilities, energy conservation practiced by customers, the use of alternative energy sources by customers, the price of electricity, the price elasticity of demand, and the rate of economic growth or decline in Alabama Power's service territory. Demand for electricity is primarily driven by the pace of economic growth that may be affected by changes in regional and global economic conditions, which may impact future earnings.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2018 Annual Report

Environmental Matters
Alabama Power's operations are regulated by state and federal environmental agencies through a variety of laws and regulations governing air, water, land, and protection of other natural resources. Alabama Power maintains comprehensive environmental compliance and GHG strategies to assess upcoming requirements and compliance costs associated with these environmental laws and regulations. The costs, including capital expenditures, operations and maintenance costs, and costs reflected in ARO liabilities, required to comply with environmental laws and regulations and to achieve stated goals may impact future electric generating unit retirement and replacement decisions, results of operations, cash flows, and/or financial condition. Related costs may result from the installation of additional environmental controls, closure and monitoring of CCR facilities, unit retirements, or changing fuel sources for certain existing units, as well as related upgrades to Alabama Power's transmission and distribution systems. A major portion of these costs is expected to be recovered through existing ratemaking provisions. The ultimate impact of environmental laws and regulations and the GHG goals discussed herein will depend on various factors, such as state adoption and implementation of requirements, the availability and cost of any deployed technology, fuel prices, and the outcome of pending and/or future legal challenges.
New or revised environmental laws and regulations could affect many areas of Alabama Power's operations. The impact of any such changes cannot be determined at this time. Environmental compliance costs could affect earnings if such costs cannot continue to be recovered in rates on a timely basis . Environmental compliance costs are recovered through Rate CNP Compliance. See Note 2 to the financial statements under "Alabama Power – Rate CNP Compliance" for additional information . Further, increased costs that are recovered through regulated rates could contribute to reduced demand for electricity , which could negatively affect results of operations, cash flows, and/or financial condition. Additionally, many commercial and industrial customers may also be affected by existing and future environmental requirements, which for some may have the potential to ultimately affect their demand for electricity .
Through 2018 , Alabama Power has invested approximately $5.4 billion in environmental capital retrofit projects to comply with environmental requirements, with annual totals of approximately $681 million, $491 million, and $260 million for 2018 , 2017 , and 2016 , respectively. Although the timing, requirements, and estimated costs could change as environmental laws and regulations are adopted or modified, as compliance plans are revised or updated, and as legal challenges to rules are initiated or completed, Alabama Power's current compliance strategy estimates capital expenditures of $635 million from 2019 through 2023 , with annual totals of approximately $226 million in 2019 , $68 million in 2020 , $118 million in 2021 , $112 million in 2022 , and $111 million in 2023 . These estimates do not include any potential compliance costs associated with pending regulation of CO 2 emissions from fossil fuel-fired electric generating units. See "Global Climate Issues" herein for additional information. Alabama Power also anticipates substantial expenditures associated with ash pond closure and ground water monitoring under the CCR Rule, which are reflected in Alabama Power's ARO liabilities. See FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements and Contractual Obligations" herein and Note 6 to the financial statements for additional information.
Environmental Laws and Regulations
Air Quality
The EPA has set National Ambient Air Quality Standards (NAAQS) for six air pollutants (carbon monoxide, lead, nitrogen dioxide, ozone, particulate matter, and SO 2 ) to protect and improve the nation's air quality, which it reviews and revises periodically. Following a NAAQS revision, states are required to develop an EPA-approved plan to protect air quality. These state plans can require additional emission controls, improvements in control efficiency, or fuel changes which can result in increased compliance and operational costs. NAAQS requirements can also adversely affect the siting of new electric generating facilities. No areas within Alabama Power's service territory are currently designated nonattainment for any NAAQS. If areas are designated as nonattainment in the future, increased compliance costs could result.
In 2011, the EPA finalized the Cross-State Air Pollution Rule (CSAPR) to address impacts of SO 2 and NO X emissions from fossil fuel-fired electric generating plants. CSAPR establishes emissions trading programs and budgets for certain states and allocates emissions allowances for sources in those states. In 2016, the EPA published a final rule establishing more stringent ozone season NO X emissions budgets in Alabama . Increases in either future fossil fuel-fired generation or the availability or cost of CSAPR allowances could have a negative financial impact on results of operations for Alabama Power .
The EPA finalized regional haze regulations in 2005 and 2017. These regulations require states, tribal governments, and various federal agencies to develop and implement plans to reduce pollutants that impair visibility and demonstrate reasonable progress toward the goal of restoring natural visibility conditions in certain areas, including national parks and wilderness areas. States must submit a revised state implementation plan (SIP) to the EPA demonstrating continued reasonable progress towards achieving visibility improvement goals. The EPA approved the regional progress SIP for the State of Alabama.

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Water Quality
In 2014, the EPA finalized requirements under Section 316(b) of the Clean Water Act (CWA) to regulate cooling water intake structures (CWIS) to minimize their effects on fish and other aquatic life at existing power plants (e.g. coal, natural gas, oil, and nuclear generating plants) and manufacturing facilities. The regulation requires plant-specific studies to determine applicable CWIS changes to protect organisms that either get caught on the intake screens (impingement) or are drawn into the cooling system (entrainment). Alabama Power is conducting these studies and currently anticipates applicable CWIS changes may include fish-friendly CWIS screens with fish return systems and minor additions of monitoring equipment at certain plants. However, the ultimate impact of this rule will depend on the outcome of these plant-specific studies, any additional protective measures required to be incorporated into each plant's National Pollutant Discharge Elimination System (NPDES) permit based on site-specific factors, and the outcome of any legal challenges.
In 2015, the EPA finalized the steam electric effluent limitations guidelines (ELG) rule (2015 ELG Rule) that set national standards for wastewater discharges from new and existing steam electric generating units generating greater than 50 MWs. The 2015 ELG Rule prohibits effluent discharges of certain waste streams and imposes stringent limits on flue gas desulfurization (scrubber) wastewater discharges. The revised technology-based limits and the CCR Rule require extensive changes to existing ash and wastewater management systems or the installation and operation of new ash and wastewater management systems. Compliance with the 2015 ELG Rule is expected to require capital expenditures and increased operational costs primarily for Alabama Power's coal-fired electric generation. State environmental agencies will incorporate specific compliance applicability dates in the NPDES permitting process for each ELG waste stream no later than December 31, 2023. The EPA is scheduled to issue a new rulemaking by December 2019 that could revise the limitations and applicability dates of two of the waste streams regulated in the 2015 ELG Rule. The impact of any changes to the 2015 ELG Rule will depend on the content of the new rule and the outcome of any legal challenges. Alabama Power does not anticipate that the unavailability of any units as a result of the ELG rule will have a material impact on Alabama Power's operations or financial condition.
In 2015, the EPA and the U.S. Army Corps of Engineers (Corps) jointly published a final rule that revised the regulatory definition of waters of the United States (WOTUS) for all CWA programs. The rule significantly expanded the scope of federal jurisdiction over waterbodies (such as rivers, streams, canals, and wastewater treatment ponds), which could impact new generation projects and permitting and reporting requirements associated with the installation, expansion, and maintenance of transmission and distribution projects. The EPA and the Corps are expected to publish a final rule in 2019 to replace the 2015 WOTUS definition. The impact of any changes to the 2015 WOTUS rule will depend on the content of this final rule and the outcome of any legal challenges.
Coal Combustion Residuals
In 2015, the EPA finalized non-hazardous solid waste regulations for the disposal of CCR, including coal ash and gypsum, in landfills and surface impoundments (ash ponds) at active generating power plants. In addition to the EPA's CCR Rule, the State of Alabama has also finalized regulations regarding the handling of CCR that have been provided to the EPA for review. This state CCR rule is generally consistent with the federal CCR Rule. The EPA's CCR Rule requires landfills and ash ponds to be evaluated against a set of performance criteria and potentially closed if minimum criteria are not met. Closure of existing landfills and ash ponds could require installation of equipment and infrastructure to manage CCR in accordance with the CCR Rule. Based on cost estimates for closure in place and monitoring of ash ponds pursuant to the CCR Rule, Alabama Power recorded AROs for each CCR unit in 2015. As further analysis was performed and closure details were developed, Alabama Power has continued to periodically update these cost estimates, as discussed further below.
The EPA published certain amendments to the CCR Rule, which became effective August 29, 2018. These amendments extend the date from April 2019 to October 31, 2020 to cease sending CCR and other waste streams to ash ponds that demonstrate compliance with all except two of the specified performance criteria.
On August 21, 2018, the U.S. Court of Appeals for the District of Columbia Circuit issued a decision suggesting the EPA should regulate previously-excluded inactive ash ponds located at retired generation facilities and questioning both the ability of unlined ash ponds to continue operating no matter the performance criteria results and the classification of clay-lined landfills and ash ponds. These developments could impact the expected timing of Alabama Power's landfill and ash pond closure activities, but the extent of any impact will depend on the outcome of ongoing litigation, anticipated EPA rulemaking action to establish further guidance, and the outcome of any legal challenges.
In June 2018, Alabama Power recorded an increase of approximately $1.2 billion to its AROs related to the CCR Rule. The revised cost estimates were based on information from feasibility studies performed on ash ponds in use at plants operated by Alabama Power . During the second quarter 2018, Alabama Power's management completed its analysis of these studies which indicated that additional closure costs, primarily related to increases in estimated ash volume, water management requirements,

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and design revisions, will be required to close these ash ponds under the planned closure-in-place methodology. As the level of work becomes more defined in the next 12 months, it is likely that these cost estimates will change and the change could be material.
Alabama Power expects to periodically update its ARO cost estimates. Absent continued recovery of ARO costs through regulated rates, Alabama Power's results of operations, cash flows, and financial condition could be materially impacted. See FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements and Contractual Obligations" herein and Note 6 to the financial statements for additional information.
The ultimate outcome of these matters cannot be determined at this time.
Nuclear Decommissioning
In June 2018, Alabama Power completed an updated decommissioning cost site study for Plant Farley. The estimated cost of decommissioning based on the study resulted in an increase in Alabama Power's ARO liability of approximately $300 million. Amounts previously contributed to Alabama Power's external trust funds are currently projected to be adequate to meet the updated decommissioning obligations. See Note 6 to the financial statements for additional information.
Global Climate Issues
On August 31, 2018, the EPA published a proposed rule known as the Affordable Clean Energy (ACE) Rule, which is intended to replace a regulation enacted in 2015 known as the Clean Power Plan (CPP), that would limit CO 2 emissions from existing fossil fuel-fired electric generating units. The CPP has been stayed by the U.S. Supreme Court since 2016. The ACE Rule would require states to develop GHG unit-specific emission rate standards based on heat-rate efficiency improvements for existing fossil fuel-fired steam units. As proposed, combustion turbines, including natural gas combined cycles, are not affected sources. As of January 1, 2019, Alabama Power has ownership interests in 20 fossil fuel-fired steam units to which the proposed ACE Rule is applicable. The ultimate impact of this rule to Alabama Power is currently unknown and will depend on changes between the proposal and the final rule, subsequent state plan developments and requirements, and any associated legal challenges.
On December 20, 2018, the EPA published a proposed review of the Standards of Performance for Greenhouse Gas Emissions from New, Modified, and Reconstructed Stationary Sources: Electric Utility Generating Units final rule (2015 NSPS rule). The EPA's final 2015 NSPS rule set standards of performance for new, modified, and reconstructed electric utility generating units which included stationary combustion turbines and fossil-fired steam boilers. This proposal reduces the stringency of the 2015 NSPS rule by not basing the new and reconstructed fossil-fired steam boiler and IGCC standards on partial carbon capture and sequestration. The impact of any changes to this rule will depend on the content of the final rule and the outcome of any legal challenges.
The EPA's GHG reporting rule requires annual reporting of GHG emissions expressed in terms of metric tons of CO 2 equivalent emissions for a company's operational control of facilities. Based on ownership or financial control of facilities, Alabama Power's 2017 GHG emissions were approximately 37 million metric tons of CO 2 equivalent. The preliminary estimate of Alabama Power's 2018 GHG emissions on the same basis is approximately 36 million metric tons of CO 2 equivalent.
Through 2017, the Southern Company system has achieved an estimated GHG emission reduction of 36% since 2007. In April 2018, Southern Company established an intermediate goal of a 50% reduction in carbon emissions from 2007 levels by 2030 and a long-term goal of low- to no-carbon operations by 2050. To achieve these goals, the Southern Company system expects to continue growing its renewable energy portfolio, optimize technology advancements to modernize its transmission and distribution systems, increase the use of natural gas for generation, complete ongoing construction projects, invest in energy efficiency, and continue research and development efforts focused on technologies to lower GHG emissions. The Southern Company system's ability to achieve these goals also will be dependent on many external factors, including supportive national energy policies, low natural gas prices, and the development, deployment, and advancement of relevant energy technologies.
FERC Matters
Open Access Transmission Tariff
On May 10, 2018, AMEA and Cooperative Energy filed with the FERC a complaint against SCS and the traditional electric operating companies (including Alabama Power) claiming that the current 11.25% base ROE used in calculating the annual transmission revenue requirements of the traditional electric operating companies' (including Alabama Power's) open access transmission tariff is unjust and unreasonable as measured by the applicable FERC standards. The complaint requested that the base ROE be set no higher than 8.65% and that the FERC order refunds for the difference in revenue requirements that results from applying a just and reasonable ROE established in this proceeding upon determining the current ROE is unjust and

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unreasonable. On June 18, 2018, SCS and the traditional electric operating companies (including Alabama Power) filed their response challenging the adequacy of the showing presented by the complainants and offering support for the current ROE. On September 6, 2018, the FERC issued an order establishing a refund effective date of May 10, 2018 in the event a refund is due and initiating an investigation and settlement procedures regarding the current base ROE. Through December 31, 2018, the estimated maximum potential refund is not expected to be material to Alabama Power's results of operations or cash flows. The ultimate outcome of this matter cannot be determined at this time.
Retail Regulatory Matters
Alabama Power 's revenues from regulated retail operations are collected through various rate mechanisms subject to the oversight of the Alabama PSC. Alabama Power currently recovers its costs from the regulated retail business primarily through Rate RSE, Rate CNP, Rate ECR, and Rate NDR. In addition, the Alabama PSC issues accounting orders to address current events impacting Alabama Power. See Note 2 to the financial statements under "Alabama Power" for additional information regarding Alabama Power's rate mechanisms and accounting orders.
Rate RSE
The Alabama PSC has adopted Rate RSE that provides for periodic annual adjustments based upon Alabama Power's projected weighted common equity return (WCER) compared to an allowable range. Rate RSE adjustments are based on forward-looking information for the applicable upcoming calendar year. Rate RSE adjustments for any two-year period, when averaged together, cannot exceed 4.0% and any annual adjustment is limited to 5.0%. When the projected WCER is under the allowed range, there is an adjusting point of 5.98% and eligibility for a performance-based adder of seven basis points, or 0.07%, to the WCER adjusting point if Alabama Power (i) has an "A" credit rating equivalent with at least one of the recognized rating agencies or (ii) is in the top one-third of a designated customer value benchmark survey. If Alabama Power's actual retail return is above the allowed WCER range, the excess will be refunded to customers unless otherwise directed by the Alabama PSC; however, there is no provision for additional customer billings should the actual retail return fall below the WCER range. Prior to January 2019, retail rates remained unchanged when the WCER range was between 5.75% and 6.21%.
On May 1, 2018, the Alabama PSC approved modifications to Rate RSE and other commitments designed to position Alabama Power to address the growing pressure on its credit quality resulting from the Tax Reform Legislation, without increasing retail rates under Rate RSE in the near term. Alabama Power plans to reduce growth in total debt by increasing equity, with corresponding reductions in debt issuances, thereby de-leveraging its capital structure. Alabama Power's goal is to achieve an equity ratio of approximately 55% by the end of 2025. At December 31, 2018, Alabama Power's equity ratio was approximately 47%.
The approved modifications to Rate RSE began for billings in January 2019. The modifications include reducing the top of the allowed WCER range from 6.21% to 6.15% and modifications to the refund mechanism applicable to prior year actual results. The modifications to the refund mechanism allow Alabama Power to retain a portion of the revenue that causes the actual WCER for a given year to exceed the allowed range.
Generally, if Alabama Power's actual WCER is between 6.15% and 7.65%, customers will receive 25% of the amount between 6.15% and 6.65%, 40% of the amount between 6.65% and 7.15%, and 75% of the amount between 7.15% and 7.65%. Customers will receive all amounts in excess of an actual WCER of 7.65%.
In conjunction with these modifications to Rate RSE, on May 8, 2018, Alabama Power consented to a moratorium on any upward adjustments under Rate RSE for 2019 and 2020 and will also return $50 million to customers through bill credits in 2019.
On November 30, 2018, Alabama Power made its required annual Rate RSE submission to the Alabama PSC of projected data for calendar year 2019. Projected earnings were within the specified range; therefore, retail rates under Rate RSE remain unchanged for 2019.
At December 31, 2018, Alabama Power's retail return exceeded the allowed WCER range, which resulted in Alabama Power establishing a regulatory liability of $109 million for Rate RSE refunds. In accordance with an Alabama PSC order issued on February 5, 2019, Alabama Power will apply $75 million to reduce the Rate ECR under recovered balance and the remaining $34 million will be refunded to customers through bill credits in July through September 2019.
Rate CNP PPA
Alabama Power's retail rates, approved by the Alabama PSC, provide for adjustments under Rate CNP to recognize the placing of new generating facilities into retail service. Alabama Power may also recover retail costs associated with certificated PPAs under

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Rate CNP PPA. No adjustments to Rate CNP PPA occurred during the period 2016 through 2018 and no adjustment is expected in 2019.
In accordance with an accounting order issued in February 2017 by the Alabama PSC, Alabama Power reclassified $69 million of the December 31, 2016 Rate CNP PPA under recovered balance to a separate regulatory asset. The amortization of the new regulatory asset through Rate RSE will begin concurrently with the effective date of Alabama Power's next depreciation study, which is expected to occur no later than 2022.
Rate CNP Compliance
Rate CNP Compliance allows for the recovery of Alabama Power's retail costs associated with laws, regulations, and other such mandates directed at the utility industry involving the environment, security, reliability, safety, sustainability, or similar considerations impacting Alabama Power's facilities or operations. Rate CNP Compliance is based on forward-looking information and provides for the recovery of these costs pursuant to a factor that is calculated annually. Compliance costs to be recovered include operations and maintenance expenses, depreciation, and a return on certain invested capital. Revenues for Rate CNP Compliance, as recorded on the financial statements, are adjusted for differences in actual recoverable costs and amounts billed in current regulated rates. Accordingly, changes in the billing factor will have no significant effect on Alabama Power's revenues or net income, but will affect annual cash flow. Changes in Rate CNP Compliance-related operations and maintenance expenses and depreciation generally will have no effect on net income.
In accordance with an accounting order issued in February 2017 by the Alabama PSC, Alabama Power reclassified $36 million of its under recovered balance in Rate CNP Compliance to a separate regulatory asset. The amortization of the new regulatory asset through Rate RSE will begin concurrently with the effective date of Alabama Power's next depreciation study, which is expected to occur no later than 2022.
On November 30, 2018, Alabama Power submitted calculations associated with its cost of complying with environmental mandates, as provided under Rate CNP Compliance. The filing reflected a projected unrecovered retail revenue requirement for environmental compliance of approximately $205 million, which is being recovered in the billing months of January 2019 through December 2019.
Rate ECR
Alabama Power has established energy cost recovery rates under Alabama Power's Rate ECR as approved by the Alabama PSC. Rates are based on an estimate of future energy costs and the current over or under recovered balance. Revenues recognized under Rate ECR and recorded on the financial statements are adjusted for the difference in actual recoverable fuel costs and amounts billed in current regulated rates. The difference in the recoverable fuel costs and amounts billed give rise to the over or under recovered amounts recorded as regulatory assets or liabilities. Alabama Power, along with the Alabama PSC, continually monitors the over or under recovered cost balance to determine whether an adjustment to billing rates is required. Changes in the Rate ECR factor have no significant effect on Alabama Power's net income, but will impact operating cash flows. Currently, the Alabama PSC may approve billing rates under Rate ECR of up to 5.910 cents per KWH.
In accordance with an accounting order issued in February 2017 by the Alabama PSC, Alabama Power reclassified $36 million of its under recovered balance in Rate ECR to a separate regulatory asset. The amortization of the new regulatory asset through Rate RSE will begin concurrently with the effective date of Alabama Power's next depreciation study, which is expected to occur no later than 2022. Alabama Power's current depreciation study became effective January 1, 2017.
On May 1, 2018, the Alabama PSC approved an increase to Rate ECR from 2.015 cents per KWH to 2.353 cents per KWH effective July 2018 through December 2018. On December 4, 2018, the Alabama PSC issued a consent order to leave this rate in effect through December 31, 2019. This change is expected to increase collections by approximately $183 million in 2019. Absent any further order from the Alabama PSC, in January 2020, the rates will return to the originally authorized 5.910 cents per KWH.
As discussed herein under "Rate RSE," in accordance with an Alabama PSC order issued on February 5, 2019, Alabama Power will utilize $75 million of the 2018 Rate RSE refund liability to reduce the Rate ECR under recovered balance.
Tax Reform Accounting Order
On May 1, 2018, the Alabama PSC approved an accounting order that authorized Alabama Power to defer the benefits of federal excess deferred income taxes associated with the Tax Reform Legislation for the year ended December 31, 2018 as a regulatory liability and to use up to $30 million of such deferrals to offset under recovered amounts under Rate ECR. The estimated deferrals for the year ended December 31, 2018 totaled approximately $63 million, subject to adjustment following the filing of the 2018 tax return, of which $30 million was used to offset the Rate ECR under recovered balance and $33 million is recorded in other

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regulatory liabilities, deferred on the balance sheet to be used for the benefit of customers as determined by the Alabama PSC at a future date. See Note 10 to the financial statements under "Current and Deferred Income Taxes" for additional information.
Software Accounting Order
On February 5, 2019, the Alabama PSC approved an accounting order that authorizes Alabama Power to establish a regulatory asset for operations and maintenance costs associated with software implementation projects. The regulatory asset will be amortized ratably over the life of the related software.
Plant Greene County
Alabama Power jointly owns Plant Greene County with an affiliate, Mississippi Power. See Note 5 to the financial statements under " Joint Ownership Agreements " for additional information regarding the joint ownership agreement. On August 6, 2018, Mississippi Power filed its proposed Reserve Margin Plan (RMP) with the Mississippi PSC, which proposes a four-year acceleration of the retirement of Plant Greene County Units 1 and 2 to the third quarter 2021 and the third quarter 2022, respectively. Mississippi Power's proposed Plant Greene County unit retirements would require the completion of proposed transmission and system reliability improvements, as well as agreement by Alabama Power. Alabama Power will continue to monitor the status of Mississippi Power's proposed RMP and associated regulatory process as well as the proposed transmission and system reliability improvements. Alabama Power will review all the facts and circumstances and will evaluate all its alternatives prior to reaching a final determination on the ongoing operations of Plant Greene County. The ultimate outcome of this matter cannot be determined at this time.
Request for Proposals for Future Generation
On September 21, 2018, Alabama Power issued a request for proposals of between 100 MWs and 1,200 MWs of capacity beginning no later than 2023. On November 9, 2018, bids were received and an evaluation of those bids is in progress. Any purchases will depend upon the cost competitiveness of the respective offers as well as other options available to Alabama Power. The ultimate outcome of this matter cannot be determined at this time.
Rate NDR
Based on an order from the Alabama PSC, Alabama Power maintains a reserve for operations and maintenance expenses to cover the cost of damages from major storms to its transmission and distribution facilities. The order approves a separate monthly Rate NDR charge to customers consisting of two components. The first component is intended to establish and maintain a reserve balance for future storms and is an on-going part of customer billing. When the reserve balance falls below $50 million , a reserve establishment charge will be activated (and the on-going reserve maintenance charge concurrently suspended) until the reserve balance reaches $75 million . In December 2017, the reserve maintenance charge was suspended and the reserve establishment charge was activated as a result of the NDR balance falling below $50 million . Alabama Power expects to collect approximately $16 million annually until the reserve balance is restored to $75 million. The NDR balance at December 31, 2018 was $20 million and is included in other regulatory liabilities, deferred on the balance sheet.
The second component of the Rate NDR charge is intended to allow recovery of any existing deferred storm-related operations and maintenance costs and any future reserve deficits over a 24 -month period. The Alabama PSC order gives Alabama Power authority to record a deficit balance in the NDR when costs of storm damage exceed any established reserve balance. Absent further Alabama PSC approval, the maximum total Rate NDR charge consisting of both components is $10 per month per non-residential customer account and $5 per month per residential customer account. Alabama Power has the authority, based on an order from the Alabama PSC, to accrue certain additional amounts as circumstances warrant.
As revenue from the Rate NDR charge is recognized, an equal amount of operations and maintenance expenses related to the NDR will also be recognized. As a result, the Rate NDR charge will not have an effect on net income but will impact operating cash flows.
Environmental Accounting Order
Based on an order from the Alabama PSC (Environmental Accounting Order), Alabama Power is allowed to establish a regulatory asset to record the unrecovered investment costs, including the unrecovered plant asset balance and the unrecovered costs associated with site removal and closure associated with future unit retirements caused by environmental regulations. The regulatory asset is being amortized and recovered over the affected unit's remaining useful life, as established prior to the decision regarding early retirement through Rate CNP Compliance. At December 31, 2018, this regulatory asset had a balance of $42 million. See "Environmental Matters – Environmental Laws and Regulations" herein for additional information regarding environmental regulations.

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Subsequent to December 31, 2018, Alabama Power determined that Plant Gorgas Units 8, 9, and 10 (approximately 1,000 MWs) will be retired by April 15, 2019 due to the expected costs of compliance with federal and state environmental regulations. In accordance with the Environmental Accounting Order, approximately $740 million of net investment costs will be transferred to a regulatory asset at the retirement date and recovered over the affected units' remaining useful lives, as established prior to the decision to retire.
Income Tax Matters
Federal Tax Reform Legislation
In December 2017, the Tax Reform Legislation was signed into law and became effective on January 1, 2018. The Tax Reform Legislation, among other things, reduced the federal corporate income tax rate to 21%, retained normalization provisions for public utility property and existing renewable energy incentives, and repealed the corporate alternative minimum tax. In addition, under the Tax Reform Legislation, net operating losses (NOLs) generated after December 31, 2017 can no longer be carried back to previous tax years but can be carried forward indefinitely, with utilization limited to 80% of taxable income of the subsequent tax year. The projected reduction of Southern Company's consolidated income tax liability resulting from the tax rate reduction also delays the expected utilization of existing tax credit carryforwards. See Note 10 to the financial statements for information on Southern Company's joint consolidated income tax allocation agreement.
Following the enactment of the Tax Reform Legislation, the SEC staff issued Staff Accounting Bulletin 118 – "Income Tax Accounting Implications of the Tax Cuts and Jobs Act" (SAB 118), which provided for a measurement period of up to one year from the enactment date to complete accounting under GAAP for the tax effects of the legislation. Due to the complex and comprehensive nature of the enacted tax law changes and their application under GAAP, Alabama Power considered all amounts recorded in the financial statements as a result of the Tax Reform Legislation "provisional" as discussed in SAB 118 and subject to revision prior to filing its 2017 tax return in the fourth quarter 2018. Alabama Power recognized tax expense of $3 million in 2017 as a result of the Tax Reform Legislation. In addition, in total, Alabama Power recorded a $281 million decrease in regulatory assets and a $2.0 billion increase in regulatory liabilities as a result of the Tax Reform Legislation. As of December 31, 2018, Alabama Power considered the measurement of impacts from the Tax Reform Legislation on deferred income tax assets and liabilities, primarily due to the impact of the reduction of the corporate income tax rate, to be complete.
However, the IRS continues to issue regulations that provide further interpretation and guidance on the law and each state's adoption of the provisions contained in the Tax Reform Legislation remains uncertain. The regulatory treatment of certain impacts of the Tax Reform Legislation is subject to the discretion of the FERC. The ultimate impact of this matter cannot be determined at this time. See Note 2 to the financial statements under "Alabama Power – Rate RSE" for additional information regarding modifications to Rate RSE to reflect the impacts of the Tax Reform Legislation. Also see FINANCIAL CONDITION AND LIQUIDITY – "Credit Rating Risk" herein and Note 10 to the financial statements under "Current and Deferred Income Taxes" for additional information.
Bonus Depreciation
Under the Tax Reform Legislation, projects with binding contracts prior to September 28, 2017 and placed in service after September 27, 2017 remain eligible for bonus depreciation under the PATH Act. The PATH Act allowed for 50% bonus depreciation for 2015 through 2017, 40% bonus depreciation for 2018, and 30% bonus depreciation for 2019 and certain long-lived assets placed in service in 2020. Based on provisional estimates, bonus depreciation is expected to result in positive cash flows of approximately $100 million for the 2018 tax year and approximately $30 million for the 2019 tax year. See Note 10 to the financial statements under "Current and Deferred Income Taxes" for additional information. The ultimate outcome of this matter cannot be determined at this time.
Other Matters
Alabama Power is involved in various other matters being litigated and regulatory matters that could affect future earnings. In addition, Alabama Power is subject to certain claims and legal actions arising in the ordinary course of business. Alabama Power's business activities are subject to extensive governmental regulation related to public health and the environment, such as laws and regulations governing air, water, land, and protection of other natural resources. Litigation over environmental issues and claims of various types, including property damage, personal injury, common law nuisance, and citizen enforcement of environmental laws and regulations, has occurred throughout the U.S. This litigation has included claims for damages alleged to have been caused by CO 2 and other emissions, CCR, and alleged exposure to hazardous materials, and/or requests for injunctive relief in connection with such matters.

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The ultimate outcome of such pending or potential litigation or regulatory matters cannot be predicted at this time; however, for current proceedings not specifically reported herein or in Notes 2 and 3 to the financial statements, management does not anticipate that the ultimate liabilities, if any, arising from such current proceedings would have a material effect on Alabama Power's financial statements. See Notes 2 and 3 to the financial statements for a discussion of various other contingencies, regulatory matters, and other matters being litigated which may affect future earnings potential.
ACCOUNTING POLICIES
Application of Critical Accounting Policies and Estimates
Alabama Power prepares its financial statements in accordance with GAAP. Significant accounting policies are described in Notes 1 , 5 , and 6 to the financial statements. In the application of these policies, certain estimates are made that may have a material impact on Alabama Power's results of operations and related disclosures. Different assumptions and measurements could produce estimates that are significantly different from those recorded in the financial statements. Senior management has reviewed and discussed the following critical accounting policies and estimates with the Audit Committee of Southern Company's Board of Directors.
Utility Regulation
Alabama Power is subject to retail regulation by the Alabama PSC and wholesale regulation by the FERC. As a result, Alabama Power applies accounting standards which require the financial statements to reflect the effects of rate regulation. Through the ratemaking process, the regulators may require the inclusion of costs or revenues in periods different than when they would be recognized by a non-regulated company. This treatment may result in the deferral of expenses and the recording of related regulatory assets based on anticipated future recovery through rates or the deferral of gains or creation of liabilities and the recording of related regulatory liabilities. The application of the accounting standards has a further effect on Alabama Power's financial statements as a result of the estimates of allowable costs used in the ratemaking process. These estimates may differ from those actually incurred by Alabama Power; therefore, the accounting estimates inherent in specific costs such as depreciation, AROs, and pension and other postretirement benefits have less of a direct impact on Alabama Power's results of operations and financial condition than they would on a non-regulated company.
As reflected in Note 2 to the financial statements under " Alabama Power Regulatory Assets and Liabilities ," significant regulatory assets and liabilities have been recorded. Management reviews the ultimate recoverability of these regulatory assets and any requirement to refund these regulatory liabilities based on applicable regulatory guidelines and GAAP. However, adverse legislative, judicial, or regulatory actions could materially impact the amounts of such regulatory assets and liabilities and could adversely impact Alabama Power's financial statements.
Asset Retirement Obligations
AROs are computed as the fair value of the estimated costs for an asset's future retirement and are recorded in the period in which the liability is incurred. The estimated costs are capitalized as part of the related long-lived asset and depreciated over the asset's useful life. In the absence of quoted market prices, AROs are estimated using present value techniques in which estimates of future cash outlays associated with the asset retirements are discounted using a credit-adjusted risk-free rate. Estimates of the timing and amounts of future cash outlays are based on projections of when and how the assets will be retired and the cost of future removal activities.
The liability for AROs primarily relates to the decommissioning of Alabama Power's nuclear facility, Plant Farley, and facilities that are subject to the CCR Rule and the related state rule, principally ash ponds. In addition, Alabama Power has AROs related to various landfill sites, underground storage tanks, asbestos removal related to ongoing repair and maintenance, disposal of polychlorinated biphenyls in certain transformers, and disposal of sulfur hexafluoride gas in certain substation breakers.
Alabama Power also has identified retirement obligations related to certain transmission and distribution facilities, asbestos containing material within long-term assets not subject to ongoing repair and maintenance activities, and certain wireless communication towers. However, liabilities for the removal of these assets have not been recorded because the settlement timing for the retirement obligations related to these assets is indeterminable and, therefore, the fair value of the retirement obligations cannot be reasonably estimated. A liability for these retirement obligations will be recognized when sufficient information becomes available to support a reasonable estimation of the retirement obligation.
The cost estimates for AROs related to the disposal of CCR are based on information using various assumptions related to closure and post-closure costs, timing of future cash outlays, inflation and discount rates, and the potential methods for complying with the CCR Rule requirements for closure in place. In June 2018, Alabama Power recorded increases of approximately $1.2 billion

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to its AROs related to the CCR Rule and approximately $300 million to its AROs related to updated nuclear decommissioning cost site studies. The revised CCR-related cost estimates as of June 30, 2018 were based on information from feasibility studies performed on ash ponds in use at the plants Alabama Power operates. During the second quarter 2018, Alabama Power's management completed its analysis of these studies which indicated that additional closure costs, primarily related to increases in estimated ash volume, water management requirements, and design revisions, will be required to close these ash ponds under the planned closure-in-place methodology. As the level of work becomes more defined in the next 12 months, it is likely that these cost estimates will change and the change could be material. Alabama Power expects to periodically update its ARO cost estimates. See FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Laws and Regulations – Coal Combustion Residuals" herein and Note 6 to the financial statements for additional information.
Given the significant judgment involved in estimating AROs, Alabama Power considers the liabilities for AROs to be critical accounting estimates.
Pension and Other Postretirement Benefits
Alabama Power's calculation of pension and other postretirement benefits expense is dependent on a number of assumptions. These assumptions include discount rates, healthcare cost trend rates, expected long-term return on plan assets, mortality rates, expected salary and wage increases, and other factors. Components of pension and other postretirement benefits expense include interest and service cost on the pension and other postretirement benefit plans, expected return on plan assets, and amortization of certain unrecognized costs and obligations. Actual results that differ from the assumptions utilized are accumulated and amortized over future periods and, therefore, generally affect recognized expense and the recorded obligation in future periods. While Alabama Power believes that the assumptions used are appropriate, differences in actual experience or significant changes in assumptions would affect its pension and other postretirement benefit costs and obligations.
Key elements in determining Alabama Power's pension and other postretirement benefit expense are the expected long-term return on plan assets and the discount rate used to measure the benefit plan obligations and the periodic benefit plan expense for future periods. The expected long-term return on pension and other postretirement benefit plan assets is based on Southern Company's investment strategy, historical experience, and expectations for long-term rates of return that consider external actuarial advice. Southern Company determines the long-term return on plan assets by applying the long-term rate of expected returns on various asset classes to Southern Company's target asset allocation. For purposes of determining Alabama Power's liability related to the pension and other postretirement benefit plans, Southern Company discounts the future related cash flows using a single-point discount rate developed from the weighted average of market-observed yields for high quality fixed income securities with maturities that correspond to expected benefit payments.
A 25 basis point change in any significant assumption (discount rate, salary increases, or long-term rate of return on plan assets) would result in a $9 million or less change in total annual benefit expense, a $99 million or less change in the projected obligation for the pension plan, and an $11 million or less change in the projected obligation for other post retirement benefit plans.
Alabama Power recorded pension costs of $27 million, $9 million, and $11 million in 2018, 2017, and 2016, respectively. Postretirement benefit costs for Alabama Power were $2 million, $3 million, and $4 million in 2018, 2017, and 2016, respectively. Such amounts are dependent on several factors including trust earnings and changes to the plans. A portion of pension and other postretirement benefit costs is capitalized based on construction-related labor charges. Pension and other postretirement benefit costs are a component of the regulated rates and generally do not have a long-term effect on net income.
See Note 11 to the financial statements for additional information regarding pension and other postretirement benefits.
Contingent Obligations
Alabama Power is subject to a number of federal and state laws and regulations, as well as other factors and conditions that subject it to environmental, litigation, and other risks. See FUTURE EARNINGS POTENTIAL herein and Notes 2 and 3 to the financial statements for more information regarding certain of these contingencies. Alabama Power periodically evaluates its exposure to such risks and records reserves for those matters where a non-tax-related loss is considered probable and reasonably estimable. The adequacy of reserves can be significantly affected by external events or conditions that can be unpredictable; thus, the ultimate outcome of such matters could materially affect Alabama Power's results of operations, cash flows, or financial condition.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2018 Annual Report

Recently Issued Accounting Standards
See Note 1 to the financial statements under " Recently Adopted Accounting Standards " for additional information.
In 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 requires lessees to recognize on the balance sheet a lease liability and a right-of-use asset for all leases. ASU 2016-02 also changes the recognition, measurement, and presentation of expense associated with leases and provides clarification regarding the identification of certain components of contracts that would represent a lease. The accounting required by lessors is relatively unchanged . ASU 2016-02 is effective for fiscal years beginning after December 15, 2018 and Alabama Power adopted the new standard effective January 1, 2019.
Alabama Power elected the transition methodology provided by ASU No. 2018-11, Leases (Topic 842): Targeted Improvements , whereby the requirements of ASU 2016-02 are applied on a prospective basis as of the adoption date of January 1, 2019, without restating prior periods. Alabama Power elected the package of practical expedients provided by ASU 2016-02 that allows prior determinations of whether existing contracts are, or contain, leases and the classification of existing leases to continue without reassessment. Additionally, Alabama Power applied the use-of-hindsight practical expedient in determining lease terms as of the date of adoption and elected the practical expedient that allows existing land easements not previously accounted for as leases not to be reassessed. Alabama Power also made accounting policy elections to account for short-term leases in all asset classes as off-balance sheet leases and combined lease and non-lease components in the computations of lease obligations and right-of-use assets for most asset classes.
Alabama Power completed the implementation of a new application to track and account for its leases and updated its internal controls and accounting policies to support the accounting for leases under ASU 2016-02. Alabama Power completed its lease inventory and determined its most significant leases involve PPAs. In the first quarter 2019, the adoption of ASU 2016-02 resulted in recording lease liabilities and right-of-use assets on Alabama Power's balance sheet each totaling approximately $195 million , with no impact on Alabama Power's statement of income.
FINANCIAL CONDITION AND LIQUIDITY
Overview
Alabama Power's financial condition remained stable at December 31, 2018. Alabama Power's cash requirements primarily consist of funding ongoing operations, common stock dividends, capital expenditures, and debt maturities. Capital expenditures and other investing activities include investments to meet projected long-term demand requirements, to maintain existing generation facilities, to comply with environmental regulations including adding environmental modifications to certain existing generating units and closures of ash ponds, to expand and improve transmission and distribution facilities, and for restoration following major storms. Operating cash flows provide a substantial portion of Alabama Power's cash needs. For the three-year period from 2019 through 2021, Alabama Power's projected common stock dividends, capital expenditures, and debt maturities are expected to exceed operating cash flows. Alabama Power plans to finance future cash needs in excess of its operating cash flows primarily through external securities issuances, borrowings from financial institutions, or equity contributions from Southern Company. Alabama Power plans to use commercial paper to manage seasonal variations in operating cash flows and for other working capital needs. Alabama Power intends to continue to monitor its access to short-term and long-term capital markets as well as its bank credit arrangements to meet future capital and liquidity needs. See "Sources of Capital," "Financing Activities," and "Capital Requirements and Contractual Obligations" herein for additional information.
Alabama Power's investments in the qualified pension plan and the nuclear decommissioning trust funds decreased in value as of December 31, 2018 as compared to December 31, 2017. No contributions to the qualified pension plan were made for the year ended December 31, 2018 and no mandatory contributions to the qualified pension plan are anticipated during 2019 . Alabama Power's funding obligations for the nuclear decommissioning trust funds are based on the most recent site study completed in 2018, and the next study is expected to be conducted by 2023. See Notes 6 and 11 to the financial statements under " Nuclear Decommissioning " and " Pension Plans ," respectively, for additional information.
Net cash provided from operating activities totaled $ 1.9 billion for 2018, an increase of $44 million as compared to 2017. The increase in cash provided from operating activities was primarily due to an increase in weather-related revenues, fuel cost recovery, and income tax refunds received in 2018, partially offset by materials and supplies purchases, the timing of vendor payments, and settlement of AROs. Net cash provided from operating activities totaled $1.8 billion for 2017, a decrease of $112 million as compared to 2017. The decrease in cash provided from operating activities was primarily due to the timing of income tax payments in 2017 and the receipt of income tax refunds in 2016 as a result of bonus depreciation, partially offset by the voluntary contribution to the qualified pension plan in 2016.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2018 Annual Report

Net cash used for investing activities totaled $2.3 billion for 2018, $1.9 billion for 2017, and $1.4 billion for 2016. These activities were primarily related to gross property additions for environmental, distribution, transmission, and steam generation assets.
Net cash provided from financing activities totaled $177 million in 2018 primarily due to issuances of long-term debt and additional capital contributions from Southern Company, partially offset by the payment of common stock dividends and a maturity of long-term debt. Net cash provided from financing activities totaled $163 million in 2017 primarily due to issuances of long-term debt and additional capital contributions from Southern Company, partially offset by the payment of common stock dividends and maturities of long-term debt. Fluctuations in cash flow from financing activities vary from year to year based on capital needs and the maturity or redemption of securities.
Significant balance sheet changes for 2018 included increases of $2.84 billion in property, plant, and equipment primarily due to $1.35 billion in AROs and additions to nuclear, distribution, and transmission assets. Other changes include $522 million in capital contributions from Southern Company and $295 million in long-term debt primarily due to a senior notes issuance. See Notes 6 and 8 to the financial statements for additional information related to changes in Alabama Power's AROs and financing activities, respectively.
Alabama Power's ratio of common equity to total capitalization plus short-term debt was 47.0% and 46.3% at December 31, 2018 and 2017, respectively. See Note 8 to the financial statements for additional information.
Sources of Capital
Alabama Power plans to obtain the funds to meet its future capital needs from sources similar to those used in the past, which were primarily from operating cash flows, external security issuances, borrowings from financial institutions, and equity contributions from Southern Company. However, the amount, type, and timing of any future financings, if needed, will depend upon prevailing market conditions, regulatory approval, and other factors. Subsequent to December 31, 2018, Alabama Power received a capital contribution totaling $1.225 billion from Southern Company.
Security issuances are subject to regulatory approval by the Alabama PSC. Additionally, with respect to the public offering of securities, Alabama Power files registration statements with the SEC under the Securities Act of 1933, as amended. The amounts of securities authorized by the Alabama PSC are continuously monitored and appropriate filings are made to ensure flexibility in the capital markets.
Alabama Power obtains financing separately without credit support from any affiliate. See Note 8 to the financial statements under "Bank Credit Arrangements" for additional information. The Southern Company system does not maintain a centralized cash or money pool. Therefore, funds of Alabama Power are not commingled with funds of any other company in the Southern Company system.
At December 31, 2018, Alabama Power's current liabilities exceeded current assets by $50 million. Alabama Power's current liabilities sometimes exceed current assets because of long-term debt maturities and the periodic use of short-term debt as a funding source, as well as significant seasonal fluctuations in cash needs.
At December 31, 2018, Alabama Power had approximately $313 million of cash and cash equivalents. Committed credit arrangements with banks at December 31, 2018 were as follows:
Expires
 
 
 
 
 
Expires Within One Year
2019
 
2020
 
2022
 
Total
 
Unused
 
Term Out
 
No Term Out
(in millions)
 
(in millions)
 
(in millions)
$
33

 
$
500

 
$
800

 
$
1,333

 
$
1,333

 
$

 
$
33

See Note 8 to the financial statements under "Bank Credit Arrangements" for additional information.
Most of these bank credit arrangements, as well as Alabama Power's term loan arrangements, contain covenants that limit debt levels and contain cross-acceleration provisions to other indebtedness (including guarantee obligations) of Alabama Power. Such cross-acceleration provisions to other indebtedness would trigger an event of default if Alabama Power defaulted on indebtedness, the payment of which was then accelerated. At December 31, 2018, Alabama Power was in compliance with all such covenants. None of the bank credit arrangements contain material adverse change clauses at the time of borrowings.
Subject to applicable market conditions, Alabama Power expects to renew or replace its bank credit arrangements as needed prior to expiration. In connection therewith, Alabama Power may extend the maturity dates and/or increase or decrease the lending commitments thereunder.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2018 Annual Report

A portion of the unused credit with banks is allocated to provide liquidity support to Alabama Power's pollution control revenue bonds and commercial paper programs. The amount of variable rate pollution control revenue bonds outstanding requiring liquidity support was $854 million at December 31, 2018.
Alabama Power also has substantial cash flow from operating activities and access to the capital markets, including a commercial paper program, to meet liquidity needs. Alabama Power may meet short-term cash needs through its commercial paper program. Alabama Power may also meet short-term cash needs through a Southern Company subsidiary organized to issue and sell commercial paper at the request and for the benefit of Alabama Power and the other traditional electric operating companies. Proceeds from such issuances for the benefit of Alabama Power are loaned directly to Alabama Power. The obligations of each traditional electric operating company under these arrangements are several and there is no cross-affiliate credit support.
Details of short-term borrowings were as follows:
 
Short-term Debt at the End of the Period
 
Short-term Debt During the Period (*)
 
Amount Outstanding
 
Weighted Average Interest Rate
 
Average
Amount Outstanding
 
Weighted
Average
Interest
Rate
 
Maximum
Amount
Outstanding
 
(in millions)
 
 
 
(in millions)
 
 
 
(in millions)
December 31, 2018
$

 
%
 
$
27

 
2.3
%
 
$
258

December 31, 2017
$
3

 
3.7
%
 
$
25

 
1.3
%
 
$
223

December 31, 2016
$

 
%
 
$
16

 
0.6
%
 
$
200

(*)
Average and maximum amounts are based upon daily balances during the 12-month periods ended December 31, 2018, 2017, and 2016.
Alabama Power believes that the need for working capital can be adequately met by utilizing commercial paper programs, lines of credit, and operating cash flows.
Financing Activities
In June 2018, Alabama Power issued $500 million aggregate principal amount of Series 2018A 4.300% Senior Notes due July 15, 2048. The proceeds were used to repay outstanding commercial paper and for general corporate purposes, including Alabama Power's continuous construction program.
In October 2018, Alabama Power purchased and held $120 million aggregate principal amount of The Industrial Development Board of the City of Mobile, Alabama Pollution Control Revenue Bonds (Alabama Power Company Plant Barry Project), Series 2008. Alabama Power reoffered these bonds to the public in November 2018.
In November 2018, Alabama Power guaranteed a $100 million three-year bank term loan for SEGCO. See Note 9 to the financial statements under "Guarantees" for additional information.
Subsequent to December 31, 2018, Alabama Power repaid at maturity $200 million aggregate principal amount of Series Z 5.125% Senior Notes due February 15, 2019.
In addition to any financings that may be necessary to meet capital requirements and contractual obligations, Alabama Power plans to continue, when economically feasible, a program to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit.
Credit Rating Risk
At December 31, 2018, Alabama Power did not have any credit arrangements that would require material changes in payment schedules or terminations as a result of a credit rating downgrade.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2018 Annual Report

There are certain contracts that could require collateral, but not accelerated payment, in the event of a credit rating change to BBB and/or Baa2 or below. These contracts are primarily for physical electricity purchases, fuel purchases, fuel transportation and storage, energy price risk management, and transmission.
The maximum potential collateral requirements under these contracts at December 31, 2018 were as follows:
Credit Ratings
Maximum Potential
Collateral
Requirements
 
(in millions)
At BBB and/or Baa2
$
1

At BBB- and/or Baa3
$
1

Below BBB- and/or Baa3
$
356

Included in these amounts are certain agreements that could require collateral in the event that either Alabama Power or Georgia Power (an affiliate of Alabama Power) has a credit rating change to below investment grade. Generally, collateral may be provided by a Southern Company guaranty, letter of credit, or cash. Additionally, a credit rating downgrade could impact the ability of Alabama Power to access capital markets and would be likely to impact the cost at which it does so.
On September 28, 2018, Fitch assigned a negative rating outlook to the ratings of Southern Company and certain of its subsidiaries (including Alabama Power).
Also on September 28, 2018, Moody's revised its rating outlook for Alabama Power from negative to stable.
As a result of the Tax Reform Legislation, certain financial metrics, such as the funds from operations to debt percentage, used by the credit rating agencies to assess Southern Company and its subsidiaries, including Alabama Power, may be negatively impacted. The modifications to Rate RSE and other commitments approved by the Alabama PSC are expected to help mitigate these potential adverse impacts to certain credit metrics and will help Alabama Power meet its goal of achieving an equity ratio of approximately 55% by the end of 2025. See Note 2 to the financial statements under "Alabama Power – Rate RSE" for additional information.
Market Price Risk
Due to cost-based rate regulation and other various cost recovery mechanisms, Alabama Power continues to have limited exposure to market volatility in interest rates, commodity fuel prices, and prices of electricity. To manage the volatility attributable to these exposures, Alabama Power nets the exposures, where possible, to take advantage of natural offsets and enters into various derivative transactions for the remaining exposures pursuant to Alabama Power's policies in areas such as counterparty exposure and risk management practices. Alabama Power's policy is that derivatives are to be used primarily for hedging purposes and mandates strict adherence to all applicable risk management policies. Derivative positions are monitored using techniques including, but not limited to, market valuation, value at risk, stress testing, and sensitivity analysis.
To mitigate future exposure to changes in interest rates, Alabama Power may enter into derivatives designated as hedges. The weighted average interest rate on $1.1 billion of long-term variable interest rate exposure at December 31, 2018 was 2.5%. If Alabama Power sustained a 100 basis point change in interest rates for all long-term variable interest rate exposure, the change would affect annualized interest expense by approximately $11 million at December 31, 2018. See Note 1 to the financial statements under "Financial Instruments" and Note 14 to the financial statements for additional information.
To mitigate residual risks relative to movements in electricity prices, Alabama Power enters into physical fixed-price contracts for the purchase and sale of electricity through the wholesale electricity market and financial hedge contracts for natural gas purchases. Alabama Power continues to manage a retail fuel-hedging program implemented per the guidelines of the Alabama PSC. Alabama Power had no material change in market risk exposure for the year ended December 31, 2018 when compared to the year ended December 31, 2017.
In addition, Rate ECR allows the recovery of specific costs associated with the sales of natural gas that become necessary due to operating considerations at Alabama Power's electric generating facilities. Rate ECR also allows recovery of the cost of financial instruments used for hedging market price risk up to 75% of the budgeted annual amount of natural gas purchases. Alabama Power may not engage in natural gas hedging activities that extend beyond a rolling 42-month window. Also, the premiums paid for natural gas financial options may not exceed 5% of Alabama Power's natural gas budget for that year.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2018 Annual Report

The changes in fair value of energy-related derivative contracts are substantially attributable to both the volume and the price of natural gas. For the years ended December 31, the changes in fair value of energy-related derivative contracts, the majority of which are composed of regulatory hedges, were as follows:
 
2018
Changes
 
2017
Changes
 
Fair Value
 
(in millions)
Contracts outstanding at the beginning of the period, assets (liabilities), net
$
(6
)
 
$
12

Contracts realized or settled
(2
)
 
(1
)
Current period changes (*)
4

 
(17
)
Contracts outstanding at the end of the period, assets (liabilities), net
$
(4
)
 
$
(6
)
(*)
Current period changes also include the changes in fair value of new contracts entered into during the period, if any.
The net hedge volumes of energy-related derivative contracts at December 31, 2018 and 2017 were as follows:
 
2018
 
2017
 
mmBtu Volume
 
(in millions)
Commodity – Natural gas swaps
65

 
64

Commodity – Natural gas options
9

 
5

Total hedge volume
74

 
69

The weighted average swap contract cost above market prices was approximately $0.08 per mmBtu at December 31, 2018 and December 31, 2017. The change in option fair value is primarily attributable to the volatility of the market and the underlying change in the natural gas price. Substantially all of the natural gas hedge gains and losses are recovered through Alabama Power's retail energy cost recovery clause.
At December 31, 2018 and 2017, substantially all of Alabama Power's energy-related derivative contracts were designated as regulatory hedges and were related to Alabama Power's fuel-hedging program. Therefore, gains and losses are initially recorded as regulatory liabilities and assets, respectively, and then are included in fuel expense as they are recovered through the energy cost recovery clause. Certain other gains and losses on energy-related derivatives, designated as cash flow hedges, are initially deferred in OCI before being recognized in income in the same period as the hedged transaction. Gains and losses on energy-related derivative contracts that are not designated or fail to qualify as hedges are recognized in the statements of income as incurred and were not material for any year presented.
Alabama Power uses over-the-counter contracts that are not exchange traded but are fair valued using prices which are market observable, and thus fall into Level 2 of the fair value hierarchy. See Note 13 to the financial statements for further discussion of fair value measurements. The maturities of the energy-related derivative contracts, which are primarily Level 2 of the fair value hierarchy, at December 31, 2018 were as follows:
 
 
 
Fair Value Measurements
 
 
 
December 31, 2018
 
Total
 
Maturity
 
Fair Value 
 
Year 1 
 
Years 2&3
 
(in millions)
Level 1
$

 
$

 
$

Level 2
(4
)
 
(1
)
 
(3
)
Level 3

 

 

Fair value of contracts outstanding at end of period
$
(4
)
 
$
(1
)
 
$
(3
)
Alabama Power is exposed to market price risk in the event of nonperformance by counterparties to energy-related and interest rate derivative contracts. Alabama Power only enters into agreements and material transactions with counterparties that have

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2018 Annual Report

investment grade credit ratings by Moody's and S&P, or with counterparties who have posted collateral to cover potential credit exposure. Therefore, Alabama Power does not anticipate market risk exposure from nonperformance by the counterparties. For additional information, see Note 1 to the financial statements under "Financial Instruments" and Note 14 to the financial statements.
Capital Requirements and Contractual Obligations
The construction program of Alabama Power is currently estimated to total $1.8 billion for 2019, $1.6 billion for 2020, $1.6 billion for 2021, $1.4 billion for 2022, and $1.5 billion for 2023. The construction program includes capital expenditures related to contractual purchase commitments for nuclear fuel and capital expenditures covered under LTSAs. Estimated capital expenditures to comply with environmental laws and regulations included in these amounts are $226 million for 2019, $68 million for 2020, $118 million for 2021, $112 million for 2022, and $111 million for 2023. These estimated expenditures do not include any potential compliance costs associated with pending regulation of CO 2 emissions from fossil-fuel-fired electric generating units. See FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Laws and Regulations" and "– Global Climate Issues" herein for additional information.
Alabama Power also anticipates costs associated with closure-in-place and monitoring of ash ponds in accordance with the CCR Rule, which are reflected in Alabama Power's ARO liabilities. These costs, which are expected to change and could change materially as underlying assumptions are refined and the cost, method, and timing of compliance activities continue to be evaluated, are currently estimated to be $232 million for 2019, $238 million for 2020, $246 million for 2021, $252 million for 2022, and $258 million for 2023. See FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Laws and Regulations – Coal Combustion Residuals" herein and Note 6 to the financial statements for additional information. Costs associated with the CCR Rule are expected to be recovered through Rate CNP Compliance.
The construction program is subject to periodic review and revision, and actual construction costs may vary from these estimates because of numerous factors. These factors include: changes in business conditions; changes in load projections; changes in environmental laws and regulations; the outcome of any legal challenges to environmental rules; changes in generating plants, including unit retirements and replacements and adding or changing fuel sources at existing generating units, to meet regulatory requirements; changes in the expected environmental compliance program; changes in FERC rules and regulations; Alabama PSC approvals; changes in legislation; the cost and efficiency of construction labor, equipment, and materials; project scope and design changes; storm impacts; and the cost of capital. In addition, there can be no assurance that costs related to capital expenditures will be fully recovered.
As a result of NRC requirements, Alabama Power has external trust funds for nuclear decommissioning costs; however, Alabama Power currently has no additional funding requirements. For additional information, see Note 6 to the financial statements under "Nuclear Decommissioning."
In addition, as discussed in Note 11 to the financial statements, Alabama Power provides postretirement benefits to substantially all employees and funds trusts to the extent required by the Alabama PSC and the FERC.
Funding requirements related to obligations associated with scheduled maturities of long-term debt, as well as the related interest, derivative obligations, pension and other postretirement benefit plans, preferred stock dividends, leases, other purchase commitments, and ARO settlements are detailed in the contractual obligations table that follows. See Notes 1 , 6 , 8 , 9 , 11 , and 14 to the financial statements for additional information.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2018 Annual Report

Contractual Obligations
Contractual obligations at December 31, 2018 were as follows:
 
2019
 
2020- 2021
 
2022- 2023
 
After 2023
 
Total
 
(in millions)
Long-term debt (a)  —
 
 
 
 
 
 
 
 
 
Principal
$
200

 
$
560

 
$
1,050

 
$
6,377

 
$
8,187

Interest
330

 
630

 
575

 
4,751

 
6,286

Preferred stock dividends (b)
15

 
29

 
29

 

 
73

Financial derivative obligations (c)
4

 
6

 

 

 
10

Operating leases (d)
12

 
17

 
9

 
1

 
39

Capital lease
1

 
1

 
1

 
1

 
4

Purchase commitments —
 
 
 
 
 
 
 
 
 
Capital (e)
1,671

 
3,049

 
2,536

 

 
7,256

Fuel (f)
1,072

 
1,342

 
531

 
1,108

 
4,053

Purchased power (g)
83

 
178

 
140

 
512

 
913

Other (h)
42

 
61

 
61

 
277

 
441

ARO settlements (i)
232

 
485

 
510

 

 
1,227

Pension and other postretirement benefit plans (j)
16

 
32

 

 

 
48

Total
$
3,678

 
$
6,390

 
$
5,442

 
$
13,027

 
$
28,537

(a)
All amounts are reflected based on final maturity dates. Alabama Power plans to continue, when economically feasible, to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit. Variable rate interest obligations are estimated based on rates at December 31, 2018, as reflected in the statements of capitalization. Fixed rates include, where applicable, the effects of interest rate derivatives employed to manage interest rate risk. Long-term debt excludes capital lease amounts (shown separately).
(b)
Preferred stock does not mature; therefore, amounts are provided for the next five years only.
(c)
Includes derivative liabilities related to cash flow hedges of forecasted debt, as well as energy-related derivatives. For additional information, see Notes 1 and 14 to the financial statements.
(d)
Excludes PPAs that are accounted for as leases and are included in purchased power.
(e)
Alabama Power provides estimated capital expenditures for a five-year period, including capital expenditures associated with environmental regulations. These amounts exclude contractual purchase commitments for nuclear fuel, capital expenditures covered under LTSAs, and estimated capital expenditures for AROs, which are reflected in "Fuel," "Other," and "ARO settlements," respectively. At December 31, 2018 , purchase commitments were outstanding in connection with the construction program. See FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Laws and Regulations" herein for additional information.
(f)
Includes commitments to purchase coal, nuclear fuel, and natural gas, as well as the related transportation and storage. In most cases, these contracts contain provisions for price escalation, minimum purchase levels, and other financial commitments. Natural gas purchase commitments are based on various indices at the time of delivery. Amounts reflected for natural gas purchase commitments have been estimated based on the NYMEX future prices at December 31, 2018 .
(g)
Estimated minimum long-term obligations for various long-term commitments for the purchase of capacity and energy.
(h)
Includes LTSAs and contracts for the procurement of limestone. LTSAs include price escalation based on inflation indices.
(i)
Represents estimated costs for a five-year period associated with closing and monitoring ash ponds in accordance with the CCR Rule and the related state rule, which are reflected in Alabama Power's ARO liabilities. Material expenditures in future years for ARO settlements also will be required for ash ponds, nuclear decommissioning, and other liabilities reflected in Alabama Power's AROs. See FUTURE EARNINGS POTENTIAL – " Environmental Matters Environmental Laws and Regulations Coal Combustion Residuals " herein and Note 6 to the financial statements for additional information.
(j)
Alabama Power forecasts contributions to the pension and other postretirement benefit plans over a three-year period. Alabama Power anticipates no mandatory contributions to the qualified pension plan during the next three years. Amounts presented represent estimated benefit payments for the nonqualified pension plans, estimated non-trust benefit payments for the other postretirement benefit plans, and estimated contributions to the other postretirement benefit plan trusts, all of which will be made from Alabama Power's corporate assets. See Note 11 to the financial statements for additional information related to the pension and other postretirement benefit plans, including estimated benefit payments. Certain benefit payments will be made through the related benefit plans. Other benefit payments will be made from Alabama Power's corporate assets.

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MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
Georgia Power Company 2018 Annual Report



OVERVIEW
Business Activities
Georgia Power operates as a vertically integrated utility providing electric service to retail customers within its traditional service territory located within the State of Georgia and to wholesale customers in the Southeast.
Many factors affect the opportunities, challenges, and risks of Georgia Power's business of providing electric service. These factors include the ability to maintain a constructive regulatory environment, to maintain and grow energy sales and customers, and to effectively manage and secure timely recovery of costs. These costs include those related to projected long-term demand growth, stringent environmental standards, including CCR rules, reliability, fuel, capital expenditures, including new generating facilities and expanding and improving transmission and distribution facilities, and restoration following major storms. Georgia Power has various regulatory mechanisms that operate to address cost recovery. Effectively operating pursuant to these regulatory mechanisms and appropriately balancing required costs and capital expenditures with customer prices will continue to challenge Georgia Power for the foreseeable future. On April 3, 2018, the Georgia PSC approved the Georgia Power Tax Reform Settlement Agreement, which provides for a total of $330 million in customer refunds for 2018 and 2019 and the deferral of certain revenues and tax benefits to be addressed in the Georgia Power 2019 Base Rate Case. The Georgia PSC also approved an increase to Georgia Power's retail equity ratio to address some of the negative cash flow and credit metric impacts of the Tax Reform Legislation. See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Rate Plans" herein for additional information on the Georgia Power Tax Reform Settlement Agreement.
Georgia Power continues to focus on several key performance indicators, including, but not limited to, customer satisfaction, plant availability, system reliability, the execution of major construction projects, and net income. Georgia Power's financial success is directly tied to customer satisfaction. Key elements of ensuring customer satisfaction include outstanding service, high reliability, and competitive prices. Management uses customer satisfaction surveys to evaluate Georgia Power's results and generally targets the top quartile of these surveys in measuring performance.
See RESULTS OF OPERATIONS herein for information on Georgia Power's financial performance.
Plant Vogtle Units 3 and 4 Status
In 2009, the Georgia PSC certified construction of Plant Vogtle Units 3 and 4 (with electric generating capacity of approximately 1,100 MWs each). Georgia Power holds a 45.7% ownership interest in Plant Vogtle Units 3 and 4. In March 2017, the EPC Contractor filed for bankruptcy protection under Chapter 11 of the U.S. Bankruptcy Code. In December 2017, the Georgia PSC approved Georgia Power's recommendation to continue construction. The current expected in-service dates remain November 2021 for Unit 3 and November 2022 for Unit 4.
In the second quarter 2018, Georgia Power revised its base capital cost forecast and estimated contingency to complete construction and start-up of Plant Vogtle Units 3 and 4 to $8.0 billion and $0.4 billion , respectively, for a total project capital cost forecast of $8.4 billion (net of $1.7 billion received under the Guarantee Settlement Agreement and approximately $188 million in related Customer Refunds), with respect to Georgia Power's ownership interest. Although Georgia Power believes these incremental costs are reasonable and necessary to complete the project and the Georgia PSC's order in the seventeenth VCM proceeding specifically states that the construction of Plant Vogtle Units 3 and 4 is not subject to a cost cap, Georgia Power did not seek rate recovery for the $0.7 billion increase in costs included in the current base capital cost forecast (or any related financing costs) in the nineteenth VCM report that was approved by the Georgia PSC on February 19, 2019. In connection with future VCM filings, Georgia Power may request the Georgia PSC to evaluate costs currently included in the construction contingency estimate for rate recovery as and when they are appropriately included in the base capital cost forecast. After considering the significant level of uncertainty that exists regarding the future recoverability of costs included in the construction contingency estimate since the ultimate outcome of these matters is subject to the outcome of future assessments by management, as well as Georgia PSC decisions in these future regulatory proceedings, Georgia Power recorded a total pre-tax charge to income of $1.1 billion ( $0.8 billion after tax) in the second quarter 2018.
As a result of the increase in the total project capital cost forecast and Georgia Power's decision not to seek rate recovery of the increase in the base capital costs, the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 were required to vote to continue construction. On September 26, 2018, the Vogtle Owners unanimously voted to continue construction of Plant Vogtle Units 3 and 4. In connection with the vote to continue construction, Georgia Power entered into (i) a binding term sheet (Vogtle Owner Term Sheet) with the other Vogtle Owners and certain of MEAG's wholly-owned subsidiaries, including MEAG Power SPVJ, LLC (MEAG SPVJ), to take certain actions which partially mitigate potential financial exposure for the other Vogtle Owners and (ii) a term sheet (MEAG Term Sheet) with MEAG and MEAG SPVJ to provide funding with respect to MEAG

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Georgia Power Company 2018 Annual Report

SPVJ's ownership interest in Plant Vogtle Units 3 and 4 under certain circumstances. On January 14, 2019, Georgia Power, MEAG, and MEAG SPVJ entered into an agreement to implement the provisions of the MEAG Term Sheet. On February 18, 2019, Georgia Power, the other Vogtle Owners, and certain of MEAG's wholly-owned subsidiaries entered into certain amendments to their joint ownership agreements to implement the provisions of the Vogtle Owner Term Sheet.
The ultimate outcome of these matters cannot be determined at this time.
See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Nuclear Construction" herein for additional information on Plant Vogtle Units 3 and 4.
Earnings
Georgia Power's 2018 net income after dividends on preferred and preference stock was $0.8 billion , representing a $621 million , or 43.9% , decrease from the previous year. The decrease was due primarily to a $1.1 billion ($0.8 billion after tax) charge in the second quarter 2018 for an estimated probable loss related to Georgia Power's construction of Plant Vogtle Units 3 and 4, revenues deferred as a regulatory liability for customer bill credits related to the Tax Reform Legislation, an adjustment for an expected refund to retail customers as a result of Georgia Power's retail ROE exceeding the allowed retail ROE range under the 2013 ARP in 2018, and higher non-fuel operations and maintenance expenses. Partially offsetting the decrease were lower federal income tax expense as a result of the Tax Reform Legislation and an increase in retail revenues associated with colder weather in the first quarter 2018 and warmer weather in the second and third quarters 2018 compared to the corresponding periods in 2017.
Georgia Power's 2017 net income after dividends on preferred and preference stock was $1.4 billion , representing an $84 million , or 6.3% , increase from the previous year. The increase was due primarily to lower non-fuel operations and maintenance expenses, primarily as a result of cost containment and modernization initiatives, partially offset by lower revenues resulting from milder weather and lower customer usage as compared to 2016.
RESULTS OF OPERATIONS
A condensed income statement for Georgia Power follows:
 
Amount
 
Increase (Decrease)
from Prior Year
 
2018
 
2018
 
2017
 
(in millions)
Operating revenues
$
8,420

 
$
110

 
$
(73
)
Fuel
1,698

 
27

 
(136
)
Purchased power
1,153

 
115

 
159

Other operations and maintenance
1,860

 
136

 
(279
)
Depreciation and amortization
923

 
28

 
40

Taxes other than income taxes
437

 
28

 
4

Estimated loss on Plant Vogtle Units 3 and 4
1,060

 
1,060

 

Total operating expenses
7,131

 
1,394

 
(212
)
Operating income
1,289

 
(1,284
)
 
139

Interest expense, net of amounts capitalized
397

 
(22
)
 
31

Other income (expense), net
115

 
11

 
23

Income taxes
214

 
(616
)
 
50

Net income
793

 
(635
)
 
81

Dividends on preferred and preference stock

 
(14
)
 
(3
)
Net income after dividends on preferred and preference stock
$
793

 
$
(621
)
 
$
84


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Georgia Power Company 2018 Annual Report

Operating Revenues
Operating revenues for 2018 were $8.4 billion , reflecting a $110 million increase from 2017 . Details of operating revenues were as follows:
 
2018
 
2017
 
(in millions)
Retail — prior year
$
7,738

 
$
7,772

Estimated change resulting from —
 
 
 
Rates and pricing
(363
)
 
114

Sales growth (decline)
92

 
(33
)
Weather
131

 
(166
)
Fuel cost recovery
154

 
51

Retail — current year
7,752

 
7,738

Wholesale revenues —
 
 
 
Non-affiliates
163

 
163

Affiliates
24

 
26

Total wholesale revenues
187

 
189

Other operating revenues
481

 
383

Total operating revenues
$
8,420

 
$
8,310

Percent change
1.3
%
 
(0.9
)%
Retail revenues of $7.8 billion in 2018 increased $14 million , or 0.2% , compared to 2017 . The significant factors driving this change are shown in the preceding table. The decrease in rates and pricing was primarily due to revenues deferred as a regulatory liability for customer bill credits related to the Tax Reform Legislation and an adjustment for an expected refund to retail customers as a result of Georgia Power's retail ROE exceeding the allowed retail ROE range under the 2013 ARP in 2018. See Note 2 to the financial statements under "Georgia Power – Rate Plans" for additional information.
Retail revenues of $7.7 billion in 2017 decreased $34 million , or 0.4% , compared to 2016 . The significant factors driving this change are shown in the preceding table. The increase in rates and pricing was primarily due to an increase in revenues related to the recovery of Plant Vogtle Units 3 and 4 construction financing costs under the NCCR tariff. See Note 2 to the financial statements under "Georgia Power – Nuclear Construction – Regulatory Matters" for additional information on the NCCR tariff.
See "Energy Sales" below for a discussion of changes in the volume of energy sold, including changes related to sales growth (decline) and weather.
Electric rates include provisions to adjust billings for fluctuations in fuel costs, including the energy component of purchased power costs. Under these fuel cost recovery provisions, fuel revenues generally equal fuel expenses and do not affect net income. See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Fuel Cost Recovery" herein for additional information.
Wholesale revenues from power sales to non-affiliated utilities were as follows:
 
2018
 
2017
 
2016
 
(in millions)
Capacity and other
$
54

 
$
67

 
$
72

Energy
109

 
96

 
103

Total non-affiliated
$
163

 
$
163

 
$
175

Wholesale capacity revenues from PPAs are recognized either on a levelized basis over the appropriate contract period or the amounts billable under the contract terms and provide for recovery of fixed costs and a return on investment. Wholesale revenues from sales to non-affiliates will vary depending on fuel prices, the market prices of wholesale energy compared to the cost of Georgia Power's and the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and the availability of the Southern Company system's generation. Increases and decreases in energy revenues that are driven by fuel prices are accompanied by an increase or decrease in fuel costs and do not have a significant

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Georgia Power Company 2018 Annual Report

impact on net income. Short-term opportunity sales are made at market-based rates that generally provide a margin above Georgia Power's variable cost of energy.
Wholesale revenues from non-affiliated sales remained flat in 2018 as compared to 2017 . Capacity revenues decreased $13 million, offset by a $13 million increase in energy revenues. The decrease in capacity revenues was primarily due to the expiration of a wholesale contract in the fourth quarter 2017. The increase in energy revenues was primarily due to increased demand, partially offset by the effects of expired contracts. Wholesale revenues from non-affiliated sales decrease d $12 million , or 6.9% , in 2017 as compared to 2016 . The decrease was related to decreases of $5 million in capacity revenues and $7 million in energy revenues. The decrease in capacity revenues reflects the expiration of wholesale contracts in the first and second quarters of 2016. The decrease in energy revenues was primarily due to lower demand and the effects of the expired contracts.
Wholesale revenues from sales to affiliated companies will vary depending on demand and the availability and cost of generating resources at each company. These affiliate sales are made in accordance with the IIC, as approved by the FERC. These transactions do not have a significant impact on earnings since this energy is generally sold at marginal cost. In 2018 , wholesale revenues from sales to affiliates decrease d $2 million as compared to 2017 . In 2017 , wholesale revenues from sales to affiliates decrease d $16 million as compared to 2016 due to a 42.8% decrease in KWH sales as a result of the lower market cost of available energy compared to the cost of Georgia Power-owned generation.
Other operating revenues increase d $98 million , or 25.6% , in 2018 from the prior year largely due to $94 million of revenues primarily from unregulated sales of products and services that were reclassified as other revenues as a result of the adoption of ASC 606, Revenue from Contracts with Customers (ASC 606). In prior periods, these revenues were included in other income (expense), net. See Note 1 to the financial statements for additional information regarding Georgia Power's adoption of ASC 606.
Other operating revenues decrease d $11 million , or 2.8% , in 2017 from the prior year primarily due to a $15 million decrease in open access transmission tariff revenues, primarily as a result of the expiration of long-term transmission services contracts, and a $14 million adjustment in 2016 for customer temporary facilities services revenues, partially offset by a $13 million increase in outdoor lighting sales revenues due to increased sales in new and replacement markets, primarily attributable to LED conversions.
Energy Sales
Changes in revenues are influenced heavily by the change in the volume of energy sold from year to year. KWH sales for 2018 and the percent change from the prior year were as follows:
 
Total
KWHs
 
Total KWH
Percent Change
 
Weather-Adjusted
Percent Change
 
2018
 
2018
 
2017
 
2018
 
2017
 
(in billions)
 
 
 
 
 
 
 
 
Residential
28.3

 
8.4
 %
 
(5.2
)%
 
2.6
%
 
(0.2
)%
Commercial
33.0

 
2.5

 
(2.4
)
 
1.6

 
(0.9
)
Industrial
23.7

 
0.6

 
(1.0
)
 
0.2

 
(0.1
)
Other
0.5

 
(6.0
)
 
(4.2
)
 
(6.3
)
 
(4.0
)
Total retail
85.5

 
3.8

 
(2.9
)
 
1.5
%
 
(0.4
)%
Wholesale
 
 
 
 
 
 
 
 
 
Non-affiliates
3.2

 
(4.2
)
 
(4.0
)
 
 
 
 
Affiliates
0.5

 
(34.2
)
 
(42.8
)
 
 
 
 
Total wholesale
3.7

 
(10.1
)
 
(15.3
)
 
 
 
 
Total energy sales
89.2

 
3.1
 %
 
(3.6
)%
 
 
 
 
Changes in retail energy sales are generally the result of changes in electricity usage by customers, changes in weather, and changes in the number of customers.
In 2018 , KWH sales for the residential class increased 8.4% compared to 2017 primarily due to colder weather in the first quarter 2018 and warmer weather in the second and third quarters 2018 compared to the corresponding periods in 2017. Weather-adjusted residential KWH sales and weather-adjusted commercial KWH sales increased by 2.6% and 1.6%, respectively, largely due to customer growth. Weather-adjusted industrial KWH sales were essentially flat primarily due to increased demand in the primary and fabricated metal sectors, offset by decreased demand in the textiles and stone, clay, and glass sectors. Additionally, customer usage for all customer classes increased due to the negative impacts of Hurricane Irma in 2017.

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Georgia Power Company 2018 Annual Report

In 2017 , KWH sales for the residential class decreased 5.2% compared to 2016 primarily due to milder weather in 2017. Weather-adjusted residential KWH sales decreased by 0.2% primarily due to a decline in average customer usage resulting from an increase in multi-family housing and energy saving initiatives, partially offset by customer growth. Weather-adjusted commercial KWH sales decreased by 0.9% primarily due to a decline in average customer usage resulting from an increase in electronic commerce transactions and energy saving initiatives, partially offset by customer growth. Weather-adjusted industrial KWH sales were essentially flat primarily due to decreased demand in the chemicals and paper sectors, offset by increased demand in the textile, non-manufacturing, and rubber sectors. Additionally, Hurricane Irma negatively impacted customer usage for all customer classes in 2017.
See "Operating Revenues" above for a discussion of significant changes in wholesale sales to non-affiliates and affiliated companies.
Fuel and Purchased Power Expenses
Fuel costs constitute one of the largest expenses for Georgia Power. The mix of fuel sources for the generation of electricity is determined primarily by demand, the unit cost of fuel consumed, and the availability of generating units. Additionally, Georgia Power purchases a portion of its electricity needs from the wholesale market.
Details of Georgia Power's generation and purchased power were as follows:
 
2018
 
2017
 
2016
Total generation (in billions of KWHs)
65.2

 
63.2

 
68.4

Total purchased power (in billions of KWHs)
27.9

 
26.9

 
24.8

Sources of generation (percent)  —
 
 
 
 
 
Gas
42

 
41

 
38

Coal
30

 
32

 
36

Nuclear
25

 
25

 
24

Hydro
3

 
2

 
2

Cost of fuel, generated (in cents per net KWH)  
 
 
 
 
 
Gas
2.75

 
2.68

 
2.36

Coal
3.21

 
3.17

 
3.28

Nuclear
0.82

 
0.83

 
0.85

Average cost of fuel, generated (in cents per net KWH)
2.40

 
2.36

 
2.33

Average cost of purchased power (in cents per net KWH) ( *)
4.79

 
4.62

 
4.53

(*) Average cost of purchased power includes fuel purchased by Georgia Power for tolling agreements where power is generated by the provider.
Fuel and purchased power expenses were $2.9 billion in 2018 , an increase of $142 million , or 5.2% , compared to 2017 . The increase was primarily due to a $74 million increase in the average cost of fuel and purchased power primarily related to higher natural gas and energy prices and an increase of $68 million related to the volume of KWHs generated and purchased primarily due to colder weather in the first quarter 2018 and warmer weather in the second and third quarters 2018 compared to the corresponding periods in 2017.
Fuel and purchased power expenses were $2.7 billion in 2017 , an increase of $23 million , or 0.9% , compared to 2016 . The increase was primarily due to an $84 million increase in the average cost of fuel and purchased power primarily related to higher natural gas prices, partially offset by a net decrease of $61 million related to the volume of KWHs generated and purchased primarily due to milder weather, resulting in lower customer demand.
Fuel and purchased power energy transactions do not have a significant impact on earnings since these fuel expenses are generally offset by fuel revenues through Georgia Power's fuel cost recovery mechanism. See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Fuel Cost Recovery" herein for additional information.
Fuel
Fuel expense was $1.7 billion in 2018 , an increase of $27 million , or 1.6% , compared to 2017 . The increase was primarily due to an increase of 2.6% in the average cost of natural gas per KWH generated and an increase of 1.9% in the volume of KWHs generated largely due to colder weather in the first quarter 2018 and warmer weather in the second and third quarters 2018 compared to the corresponding periods in 2017. Fuel expense was $1.7 billion in 2017 , a decrease of $136 million , or 7.5% ,

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Georgia Power Company 2018 Annual Report

compared to 2016 . The decrease was primarily due to a decrease of 7.7% in the volume of KWHs generated largely due to milder weather, resulting in lower customer demand, partially offset by an increase of 13.6% in the average cost of natural gas per KWH generated.
Purchased Power - Non-Affiliates
Purchased power expense from non-affiliates was $430 million in 2018 , an increase of $14 million , or 3.4% , compared to 2017 . The increase was primarily due to an 8.5% increase in the average cost per KWH purchased primarily due to higher energy prices, partially offset by a decrease of 3.8% in volume of KWHs purchased primarily due to the higher market cost of available energy as compared to Southern Company system resources. Purchased power expense from non-affiliates was $416 million in 2017 , an increase of $55 million , or 15.2% , compared to 2016 . The increase was primarily due to a 13.4% increase in the volume of KWHs purchased primarily due to unplanned outages at Georgia Power-owned generating units.
Energy purchases from non-affiliates will vary depending on the market prices of wholesale energy as compared to the cost of the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and the availability of the Southern Company system's generation.
Purchased Power - Affiliates
Purchased power expense from affiliates was $723 million in 2018 , an increase of $101 million , or 16.2% , compared to 2017 . The increase was primarily due to a 6.3% increase in the volume of KWHs purchased due to colder weather in the first quarter 2018 and scheduled generation outages and warmer weather in the second and third quarters 2018 and a 3.0% increase in the average cost per KWH purchased primarily resulting from higher energy prices. Purchased power expense from affiliates was $622 million in 2017 , an increase of $104 million , or 20.1% , compared to 2016 . The increase was primarily due to a 7.0% increase in the volume of KWHs purchased to support Southern Company system transmission reliability and as a result of unplanned outages at Georgia Power-owned generating units and a 1.8% increase in the average cost per KWH purchased primarily resulting from higher natural gas prices.
Energy purchases from affiliates will vary depending on the demand and the availability and cost of generating resources at each company within the Southern Company system. These purchases are made in accordance with the IIC or other contractual agreements, all as approved by the FERC.
Other Operations and Maintenance Expenses
In 2018 , other operations and maintenance expenses increase d $136 million , or 7.9% , compared to 2017 . The increase was primarily due to $88 million of expenses from unregulated sales of products and services that were reclassified to other operations and maintenance expenses as a result of the adoption of ASC 606. In prior periods, these expenses were included in other income (expense), net. Also contributing to the increase were a $39 million decrease in gains on sales of assets and a $28 million increase in transmission and distribution overhead line maintenance, primarily related to additional vegetation management, partially offset by a decrease of $18 million associated with an employee attrition plan in 2017. See Note 1 to the financial statements for additional information regarding Georgia Power's adoption of ASC 606.
In 2017 , other operations and maintenance expenses decrease d $279 million , or 13.9% , compared to 2016 . The decrease was primarily due to cost containment and modernization activities implemented in the third quarter 2016 that contributed to decreases of $85 million in generation maintenance costs, $46 million in transmission and distribution overhead line maintenance, $22 million in employee benefits, and $22 million in customer accounts and sales costs. Other factors include a $40 million increase in gains on sales of assets, a $19 million decrease in scheduled generation outage costs, and a $15 million decrease in customer assistance expenses, primarily in demand-side management costs related to the timing of new programs.
Depreciation and Amortization
Depreciation and amortization increase d $28 million , or 3.1% , in 2018 compared to 2017 . The increase was primarily due to additional plant in service.
Depreciation and amortization increase d $40 million , or 4.7% , in 2017 compared to 2016 . The increase was primarily due to a $33 million increase related to additional plant in service and a $14 million decrease in amortization of regulatory liabilities related to other cost of removal obligations that expired in December 2016, partially offset by a $9 million decrease in depreciation related to generating unit retirements in 2016 and amortization of regulatory assets related to certain cancelled environmental and fuel conversion projects that expired in December 2016.
See Note 5 to the financial statements under "Depreciation and Amortization" for additional information.

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Georgia Power Company 2018 Annual Report

Taxes Other Than Income Taxes
In 2018 , taxes other than income taxes increase d $28 million , or 6.8% , compared to 2017 primarily due to increases of $19 million in property taxes as a result of an increase in the assessed value of property and $11 million in municipal franchise fees largely related to higher retail revenues. In 2017 , taxes other than income taxes increase d $4 million , or 1.0% , compared to 2016 .
Estimated Loss on Plant Vogtle Units 3 and 4
In the second quarter 2018, an estimated probable loss of $1.1 billion was recorded to reflect Georgia Power's revised estimate to complete construction and start-up of Plant Vogtle Units 3 and 4, which reflects the increase in costs included in the revised base capital cost forecast for which Georgia Power did not seek rate recovery and costs included in the revised construction contingency estimate for which Georgia Power may seek rate recovery as and when such costs are appropriately included in the base capital cost forecast. See Note 2 to the financial statements under "Georgia Power – Nuclear Construction" for additional information.
Interest Expense, Net of Amounts Capitalized
In 2018 , interest expense, net of amounts capitalized decrease d $22 million , or 5.3% , compared to 2017 and increase d $31 million , or 8.0% , compared to 2016 primarily due to changes in outstanding borrowings.
Other Income (Expense), Net
In 2018 , other income (expense), net increase d $11 million compared to the prior year primarily due to an increase in AFUDC equity of $29 million resulting from a higher AFUDC rate due to a higher equity ratio and lower short-term borrowings, partially offset by a decrease of $21 million associated with revenues and expenses, net primarily from unregulated sales of products and services. In 2018, these revenues and expenses are included in other revenues and other operations and maintenance expenses, respectively, as a result of the adoption of ASC 606. See Note 1 to the financial statements for additional information regarding Georgia Power's adoption of ASC 606.
In 2017 , other income (expense), net increase d $23 million compared to the prior year primarily due to a $28 million decrease in the non-service cost components of net periodic pension and other postretirement benefit costs, a $7 million increase in third party infrastructure services revenue, and a $6 million increase in wholesale operating fee revenue associated with contractual targets, partially offset by a $10 million increase in charitable donations and an $8 million decrease in AFUDC equity resulting from higher short-term borrowings. See Notes 1 under " Recently Adopted Accounting Standards " and 11 to the financial statements for additional information on Georgia Power's net periodic pension and other postretirement benefit costs.
Income Taxes
Income taxes decrease d $616 million , or 74.2% , in 2018 compared to the prior year primarily due to a lower federal income tax rate as a result of the Tax Reform Legislation and the reduction in pre-tax earnings resulting from the estimated probable loss related to Plant Vogtle Units 3 and 4.
Income taxes increase d $50 million , or 6.4% , in 2017 compared to the prior year primarily due to higher pre-tax earnings, partially offset by an adjustment related to the Tax Reform Legislation.
See Note 10 to the financial statements for additional information.
Dividends on Preferred and Preference Stock
Dividends on preferred and preference stock decrease d $14 million , or 100.0% , in 2018 compared to 2017 and decrease d $3 million , or 17.6% , in 2017 compared to 2016 . The decreases were due to the redemption in October 2017 of all outstanding shares of Georgia Power's preferred and preference stock. See Note 8 to the financial statements under "Outstanding Classes of Capital Stock – Georgia Power" for additional information.
Effects of Inflation
Georgia Power is subject to rate regulation that is generally based on the recovery of historical and projected costs. The effects of inflation can create an economic loss since the recovery of costs could be in dollars that have less purchasing power. Any adverse effect of inflation on Georgia Power's results of operations has not been substantial in recent years.

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Georgia Power Company 2018 Annual Report

FUTURE EARNINGS POTENTIAL
General
Georgia Power operates as a vertically integrated utility providing electric service to retail customers within its traditional service territory located in the State of Georgia and to wholesale customers in the Southeast. Prices for electricity provided by Georgia Power to retail customers are set by the Georgia PSC under cost-based regulatory principles. Retail rates and earnings are reviewed and may be adjusted periodically within certain limitations. Prices for wholesale electricity sales, interconnecting transmission lines, and the exchange of electric power are regulated by the FERC. See ACCOUNTING POLICIES – "Application of Critical Accounting Policies and Estimates – Utility Regulation" herein and Note 2 to the financial statements under "Georgia Power" for additional information about regulatory matters.
The results of operations for the past three years are not necessarily indicative of future earnings potential. The level of Georgia Power's future earnings depends on numerous factors that affect the opportunities, challenges, and risks of Georgia Power's business of providing electric service. These factors include Georgia Power's ability to maintain a constructive regulatory environment that continues to allow for the timely recovery of prudently-incurred costs during a time of increasing costs, continued customer growth, and the weak pace of growth in electricity use per customer, especially in residential and commercial markets. Plant Vogtle Units 3 and 4 construction and rate recovery are also major factors. Earnings will also depend upon maintaining and growing sales, considering, among other things, the adoption and/or penetration rates of increasingly energy-efficient technologies, increasing volumes of electronic commerce transactions, and more multi-family home construction, all of which could contribute to a net reduction in customer usage. Earnings are subject to a variety of other factors. These factors include weather, competition, new energy contracts with other utilities, energy conservation practiced by customers, the use of alternative energy sources by customers, the price of electricity, the price elasticity of demand, and the rate of economic growth or decline in Georgia Power's service territory. Demand for electricity is primarily driven by the pace of economic growth that may be affected by changes in regional and global economic conditions, which may impact future earnings.
Environmental Matters
Georgia Power's operations are regulated by state and federal environmental agencies through a variety of laws and regulations governing air, water, land, and protection of other natural resources. Georgia Power maintains comprehensive environmental compliance and GHG strategies to assess upcoming requirements and compliance costs associated with these environmental laws and regulations. The costs, including capital expenditures, operations and maintenance costs, and costs reflected in ARO liabilities, required to comply with environmental laws and regulations and to achieve stated goals may impact future electric generating unit retirement and replacement decisions, results of operations, cash flows, and/or financial condition. Related costs may result from the installation of additional environmental controls, closure and monitoring of CCR facilities, unit retirements, or changing fuel sources for certain existing units, as well as related upgrades to Georgia Power's transmission and distribution systems. A major portion of these costs is expected to be recovered through retail rates. The ultimate impact of environmental laws and regulations and the GHG goals discussed herein will depend on various factors, such as state adoption and implementation of requirements, the availability and cost of any deployed technology, fuel prices, and the outcome of pending and/or future legal challenges.
New or revised environmental laws and regulations could affect many areas of Georgia Power's operations. The impact of any such changes cannot be determined at this time. Environmental compliance costs could affect earnings if such costs cannot continue to be recovered in rates on a timely basis . Georgia Power's Environmental Compliance Cost Recovery (ECCR) tariff allows for the recovery of capital and operations and maintenance costs related to environmental controls mandated by state and federal regulations . Further, increased costs that are recovered through regulated rates could contribute to reduced demand for electricity , which could negatively affect results of operations, cash flows, and/or financial condition. Additionally, many commercial and industrial customers may also be affected by existing and future environmental requirements, which for some may have the potential to ultimately affect their demand for electricity .
Through 2018 , Georgia Power has invested approximately $6.0 billion in environmental capital retrofit projects to comply with environmental requirements, with annual totals of approximately $0.5 billion, $0.3 billion, and $0.2 billion for 2018 , 2017 , and 2016 , respectively. Although the timing, requirements, and estimated costs could change as environmental laws and regulations are adopted or modified, as compliance plans are revised or updated, and as legal challenges to rules are initiated or completed, Georgia Power's current compliance strategy estimates capital expenditures of $0.7 billion from 2019 through 2023 , with annual totals of approximately $0.2 billion , $0.1 billion , $0.1 billion , $0.2 billion , and $0.1 billion for 2019 , 2020 , 2021 , 2022 , and 2023 , respectively. These estimates do not include any potential compliance costs associated with pending regulation of CO 2 emissions from fossil fuel-fired electric generating units. See "Global Climate Issues" herein for additional information. Georgia Power also anticipates substantial expenditures associated with ash pond closure and ground water monitoring under the CCR Rule, which

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are reflected in Georgia Power's ARO liabilities. See FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements and Contractual Obligations" herein and Note 6 to the financial statements for additional information.
Environmental Laws and Regulations
Air Quality
The EPA has set National Ambient Air Quality Standards (NAAQS) for six air pollutants (carbon monoxide, lead, nitrogen dioxide, ozone, particulate matter, and SO 2 ) to protect and improve the nation's air quality, which it reviews and revises periodically. Following a NAAQS revision, states are required to develop an EPA-approved plan to protect air quality. These state plans can require additional emission controls, improvements in control efficiency, or fuel changes which can result in increased compliance and operational costs. NAAQS requirements can also adversely affect the siting of new electric generating facilities. All areas within Georgia Power's service territory have been designated as attainment for all NAAQS except for a seven-county area within metropolitan Atlanta that is not in attainment with the 2015 ozone NAAQS and the area surrounding Plant Hammond , which will not be designated attainment or nonattainment for the 2010 SO 2 standard until December 2020 . If areas are designated as nonattainment in the future, increased compliance costs could result. See "Retail Regulatory Matters – Integrated Resource Plan" herein for information regarding Georgia Power's request to decertify and retire Plant Hammond.
In 2011, the EPA finalized the Cross-State Air Pollution Rule (CSAPR) to address impacts of SO 2 and NO X emissions from fossil fuel-fired electric generating plants. CSAPR establishes emissions trading programs and budgets for certain states and allocates emissions allowances for sources in those states. In 2016, the EPA published a final rule establishing more stringent ozone season NO X emissions budgets in Alabama . Georgia's ozone season NO X emissions budget remained unchanged. Increases in either future fossil fuel-fired generation or the availability or cost of CSAPR allowances could have a negative financial impact on results of operations for Georgia Power .
The EPA finalized regional haze regulations in 2005 and 2017. These regulations require states, tribal governments, and various federal agencies to develop and implement plans to reduce pollutants that impair visibility and demonstrate reasonable progress toward the goal of restoring natural visibility conditions in certain areas, including national parks and wilderness areas. States must submit a revised state implementation plan (SIP) to the EPA demonstrating continued reasonable progress towards achieving visibility improvement goals. The EPA has approved the regional progress SIP for the State of Georgia.
Water Quality
In 2014, the EPA finalized requirements under Section 316(b) of the Clean Water Act (CWA) to regulate cooling water intake structures (CWIS) to minimize their effects on fish and other aquatic life at existing power plants (e.g. coal, natural gas, oil, and nuclear generating plants) and manufacturing facilities. The regulation requires plant-specific studies to determine applicable CWIS changes to protect organisms that either get caught on the intake screens (impingement) or are drawn into the cooling system (entrainment). Georgia Power is conducting these studies and currently anticipates applicable CWIS changes may include fish-friendly CWIS screens with fish return systems and minor additions of monitoring equipment at certain plants. However, the ultimate impact of this rule will depend on the outcome of these plant-specific studies, any additional protective measures required to be incorporated into each plant's National Pollutant Discharge Elimination System (NPDES) permit based on site-specific factors, and the outcome of any legal challenges.
In 2015, the EPA finalized the steam electric effluent limitations guidelines (ELG) rule (2015 ELG Rule) that set national standards for wastewater discharges from new and existing steam electric generating units generating greater than 50 MWs. The 2015 ELG Rule prohibits effluent discharges of certain waste streams and imposes stringent limits on flue gas desulfurization (scrubber) wastewater discharges. The revised technology-based limits and the CCR Rule require extensive changes to existing ash and wastewater management systems or the installation and operation of new ash and wastewater management systems. Compliance with the 2015 ELG Rule is expected to require capital expenditures and increased operational costs primarily for Georgia Power's coal-fired electric generation. State environmental agencies will incorporate specific compliance applicability dates in the NPDES permitting process for each ELG waste stream no later than December 31, 2023. The EPA is scheduled to issue a new rulemaking by December 2019 that could revise the limitations and applicability dates of two of the waste streams regulated in the 2015 ELG Rule. The impact of any changes to the 2015 ELG Rule will depend on the content of the new rule and the outcome of any legal challenges.
In 2015, the EPA and the U.S. Army Corps of Engineers (Corps) jointly published a final rule that revised the regulatory definition of waters of the United States (WOTUS) for all CWA programs. The rule significantly expanded the scope of federal jurisdiction over waterbodies (such as rivers, streams, canals, and wastewater treatment ponds), which could impact new generation projects and permitting and reporting requirements associated with the installation, expansion, and maintenance of transmission and distribution projects. The EPA and the Corps are expected to publish a final rule in 2019 to replace the 2015

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WOTUS definition. The impact of any changes to the 2015 WOTUS rule will depend on the content of this final rule and the outcome of any legal challenges.
Coal Combustion Residuals
In 2015, the EPA finalized non-hazardous solid waste regulations for the disposal of CCR, including coal ash and gypsum, in landfills and surface impoundments (ash ponds) at active generating power plants. In addition to the EPA's CCR Rule, the State of Georgia has also finalized its own regulations regarding the handling of CCR. The EPA's CCR Rule requires landfills and ash ponds to be evaluated against a set of performance criteria and potentially closed if minimum criteria are not met. Closure of existing landfills and ash ponds could require installation of equipment and infrastructure to manage CCR in accordance with the CCR Rule. Based on cost estimates for closure and monitoring of landfills and ash ponds pursuant to the CCR Rule, Georgia Power recorded an update to the AROs for each CCR unit in 2015. As further analysis is performed and closure details are developed, Georgia Power has continued to periodically update these cost estimates, as discussed further below.
The EPA published certain amendments to the CCR Rule, which became effective August 29, 2018. These amendments extend the date from April 2019 to October 31, 2020 to cease sending CCR and other waste streams to ash ponds that demonstrate compliance with all except two of the specified performance criteria. However, the Georgia Department of Natural Resources has not incorporated these amendments into its state CCR rule.
On August 21, 2018, the U.S. Court of Appeals for the District of Columbia Circuit issued a decision suggesting the EPA should regulate previously-excluded inactive ash ponds located at retired generation facilities and questioning both the ability of unlined ash ponds to continue operating no matter the performance criteria results and the classification of clay-lined landfills and ash ponds. These developments could impact the expected timing of Georgia Power's landfill and ash pond closure activities, but the extent of any impact will depend on the outcome of ongoing litigation, anticipated EPA rulemaking action to establish further guidance, and the outcome of any legal challenges.
In December 2018, Georgia Power recorded an increase of approximately $3.1 billion to its AROs related to the CCR Rule and the related state rule. During the second half of 2018, Georgia Power completed a strategic assessment related to its plans to close the ash ponds at all of its generating plants in compliance with the CCR Rule and the related state rule. This assessment included engineering and constructability studies related to design assumptions for ash pond closures and advanced engineering methods. The results indicated that additional closure costs will be required to close these ash ponds, primarily due to changes in closure strategies, the estimated amount of ash to be excavated, and additional water management requirements necessary to support closure strategies. These factors also impact the estimated timing of future cash outlays.
Georgia Power expects to periodically update its ARO cost estimates. Absent continued recovery of ARO costs through regulated rates, Georgia Power's results of operations, cash flows, and financial condition could be materially impacted. See "Retail Regulatory Matters – Integrated Resource Plan" and FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements and Contractual Obligations" herein and Note 6 to the financial statements for additional information.
The ultimate outcome of these matters cannot be determined at this time.
Nuclear Decommissioning
In December 2018, Georgia Power completed updated decommissioning cost site studies for Plant Hatch and Plant Vogtle Units 1 and 2. The estimated cost of decommissioning based on the studies resulted in an increase in Georgia Power's ARO liability of approximately $130 million . Georgia Power currently collects $4 million and $2 million annually in rates, which is used to fund external nuclear decommissioning trusts for Plant Hatch and Plant Vogtle Units 1 and 2, respectively. Georgia Power expects the Georgia PSC to review and adjust, if necessary, these amounts in the Georgia Power 2019 Base Rate Case. See Note 6 to the financial statements for additional information.
Environmental Remediation
Georgia Power must comply with environmental laws and regulations governing the handling and disposal of waste and releases of hazardous substances. Under these various laws and regulations, Georgia Power may also incur substantial costs to clean up affected sites. Georgia Power conducts studies to determine the extent of any required cleanup and has recognized the estimated costs to clean up known impacted sites in its financial statements. Amounts for cleanup and ongoing monitoring costs were not material for any year presented. Georgia Power has received authority from the Georgia PSC to recover approved environmental compliance costs through regulatory mechanisms. Georgia Power may be liable for some or all required cleanup costs for additional sites that may require environmental remediation. See Note 3 to the financial statements under "Environmental Remediation" for additional information.

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Global Climate Issues
On August 31, 2018, the EPA published a proposed rule known as the Affordable Clean Energy (ACE) Rule, which is intended to replace a regulation enacted in 2015 known as the Clean Power Plan (CPP), that would limit CO 2 emissions from existing fossil fuel-fired electric generating units. The CPP has been stayed by the U.S. Supreme Court since 2016. The ACE Rule would require states to develop GHG unit-specific emission rate standards based on heat-rate efficiency improvements for existing fossil fuel-fired steam units. As proposed, combustion turbines, including natural gas combined cycles, are not affected sources. As of January 1, 2019, Georgia Power has ownership interests in 20 fossil fuel-fired steam units to which the proposed ACE Rule is applicable. The ultimate impact of this rule to Georgia Power is currently unknown and will depend on changes between the proposal and the final rule, subsequent state plan developments and requirements, and any associated legal challenges.
On December 20, 2018, the EPA published a proposed review of the Standards of Performance for Greenhouse Gas Emissions from New, Modified, and Reconstructed Stationary Sources: Electric Utility Generating Units final rule (2015 NSPS rule). The EPA's final 2015 NSPS rule set standards of performance for new, modified, and reconstructed electric utility generating units which included stationary combustion turbines and fossil-fired steam boilers. This proposal reduces the stringency of the 2015 NSPS rule by not basing the new and reconstructed fossil-fired steam boiler and IGCC standards on partial carbon capture and sequestration. The impact of any changes to this rule will depend on the content of the final rule and the outcome of any legal challenges.
The EPA's GHG reporting rule requires annual reporting of GHG emissions expressed in terms of metric tons of CO 2 equivalent emissions for a company's operational control of facilities. Based on ownership or financial control of facilities, Georgia Power's 2017 GHG emissions were approximately 30 million metric tons of CO 2 equivalent. The preliminary estimate of Georgia Power's 2018 GHG emissions on the same basis is approximately 30 million metric tons of CO 2 equivalent.
Through 2017, the Southern Company system has achieved an estimated GHG emission reduction of 36% since 2007. In April 2018, Southern Company established an intermediate goal of a 50% reduction in carbon emissions from 2007 levels by 2030 and a long-term goal of low- to no-carbon operations by 2050. To achieve these goals, the Southern Company system expects to continue growing its renewable energy portfolio, optimize technology advancements to modernize its transmission and distribution systems, increase the use of natural gas for generation, complete ongoing construction projects, including Georgia Power's interest in Plant Vogtle Units 3 and 4, invest in energy efficiency, and continue research and development efforts focused on technologies to lower GHG emissions. The Southern Company system's ability to achieve these goals also will be dependent on many external factors, including supportive national energy policies, low natural gas prices, and the development, deployment, and advancement of relevant energy technologies.
FERC Matters
On May 10, 2018, AMEA and Cooperative Energy filed with the FERC a complaint against SCS and the traditional electric operating companies (including Georgia Power) claiming that the current 11.25% base ROE used in calculating the annual transmission revenue requirements of the traditional electric operating companies' (including Georgia Power's) open access transmission tariff is unjust and unreasonable as measured by the applicable FERC standards. The complaint requested that the base ROE be set no higher than 8.65% and that the FERC order refunds for the difference in revenue requirements that results from applying a just and reasonable ROE established in this proceeding upon determining the current ROE is unjust and unreasonable. On June 18, 2018, SCS and the traditional electric operating companies (including Georgia Power) filed their response challenging the adequacy of the showing presented by the complainants and offering support for the current ROE. On September 6, 2018, the FERC issued an order establishing a refund effective date of May 10, 2018 in the event a refund is due and initiating an investigation and settlement procedures regarding the current base ROE. Through December 31, 2018, the estimated maximum potential refund is not expected to be material to Georgia Power's results of operations or cash flows. The ultimate outcome of this matter cannot be determined at this time.
Retail Regulatory Matters
Georgia Power's revenues from regulated retail operations are collected through various rate mechanisms subject to the oversight of the Georgia PSC. Georgia Power currently recovers its costs from the regulated retail business through the 2013 ARP, which includes traditional base tariff rates, Demand-Side Management (DSM) tariffs, ECCR tariffs, and Municipal Franchise Fee (MFF) tariffs. Georgia Power is scheduled to file a base rate case by July 1, 2019, which may continue or modify these tariffs. In addition, financing costs on certified construction costs of Plant Vogtle Units 3 and 4 are being collected through the NCCR tariff and fuel costs are collected through a separate fuel cost recovery tariff. See Note 2 to the financial statements under "Georgia Power – Rate Plans," " – Fuel Cost Recovery," and " – Nuclear Construction" for additional information.

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On November 16, 2018, Georgia Power completed the sale of its natural gas lateral pipeline serving Plant McDonough Units 4 through 6 to SNG at net book value, as approved by the Georgia PSC on January 16, 2018. Georgia Power expects payment of $142 million from SNG to occur in the first quarter 2020. During the interim period, Georgia Power will receive a discounted shipping rate to reflect the delayed consideration. Southern Company Gas, an affiliate of Georgia Power, owns a 50% equity interest in SNG.
Rate Plans
Pursuant to the terms and conditions of a settlement agreement related to Southern Company's acquisition of Southern Company Gas approved by the Georgia PSC in 2016, the 2013 ARP will continue in effect until December 31, 2019, and Georgia Power will be required to file its next base rate case by July 1, 2019. Furthermore, through December 31, 2019, Georgia Power will retain its merger savings, net of transition costs, as defined in the settlement agreement; through December 31, 2022, such net merger savings will be shared on a 60 / 40 basis with customers; thereafter, all merger savings will be retained by customers.
There were no changes to Georgia Power's traditional base tariff rates, ECCR tariff, DSM tariffs, or MFF tariff in 2017 or 2018.
Under the 2013 ARP, Georgia Power's retail ROE is set at 10.95% and earnings are evaluated against a retail ROE range of 10.00% to 12.00% . Two-thirds of any earnings above 12.00% will be directly refunded to customers, with the remaining one-third retained by Georgia Power. There will be no recovery of any earnings shortfall below 10.00% on an actual basis. In 2016, Georgia Power's retail ROE exceeded 12.00% , and Georgia Power refunded to retail customers in 2018 approximately $40 million as approved by the Georgia PSC. On February 5, 2019, the Georgia PSC approved a settlement between Georgia Power and the staff of the Georgia PSC under which Georgia Power's retail ROE for 2017 was stipulated to exceed 12.00% and Georgia Power will reduce certain regulatory assets by approximately $4 million in lieu of providing refunds to retail customers. In 2018, Georgia Power's retail ROE exceeded 12.00% , and Georgia Power accrued approximately $100 million to refund to retail customers, subject to review and approval by the Georgia PSC.
On April 3, 2018, the Georgia PSC approved the Georgia Power Tax Reform Settlement Agreement. Pursuant to the Georgia Power Tax Reform Settlement Agreement, to reflect the federal income tax rate reduction impact of the Tax Reform Legislation, Georgia Power will refund to customers a total of $330 million through bill credits. Georgia Power issued bill credits of approximately $130 million in 2018 and will issue bill credits of approximately $95 million in June 2019 and $105 million in February 2020. In addition, Georgia Power is deferring as a regulatory liability (i) the revenue equivalent of the tax expense reduction resulting from legislation lowering the Georgia state income tax rate from 6.00% to 5.75% in 2019 and (ii) the entire benefit of federal and state excess accumulated deferred income taxes, which is expected to total approximately $700 million at December 31, 2019. At December 31, 2018 , the related regulatory liability balance totaled $610 million . The amortization of these regulatory liabilities is expected to be addressed in the Georgia Power 2019 Base Rate Case. If there is not a base rate case in 2019, customers will receive $185 million in annual bill credits beginning in 2020, with any additional federal and state income tax savings deferred as a regulatory liability, until Georgia Power's next base rate case.
To address some of the negative cash flow and credit quality impacts of the Tax Reform Legislation, the Georgia PSC also approved an increase in Georgia Power's retail equity ratio to the lower of (i) Georgia Power's actual common equity weight in its capital structure or (ii) 55% , until the Georgia Power 2019 Base Rate Case. At December 31, 2018 , Georgia Power's actual retail common equity ratio (on a 13 -month average basis) was approximately 55% . Benefits from reduced federal income tax rates in excess of the amounts refunded to customers will be retained by Georgia Power to cover the carrying costs of the incremental equity in 2018 and 2019.
Integrated Resource Plan
See "Environmental Matters" herein for additional information regarding proposed and final EPA rules and regulations, including revisions to ELG for steam electric power plants and additional regulations of CCR and CO 2 .
In 2016, the Georgia PSC approved Georgia Power's triennial Integrated Resource Plan (2016 IRP) including the reclassification of the remaining net book value of Plant Mitchell Unit 3 and costs associated with materials and supplies remaining at the unit retirement date to a regulatory asset. Recovery of the unit's net book value will continue through December 31, 2019, as provided in the 2013 ARP. The timing of the recovery of the remaining balance of the unit's net book value as of December 31, 2019 and costs associated with materials and supplies remaining at the unit retirement date was deferred for consideration in the Georgia Power 2019 Base Rate Case.
In the 2016 IRP, the Georgia PSC also approved recovery of costs up to $99 million through June 30, 2019 to preserve nuclear generation as an option at a future generation site in Stewart County, Georgia. In March 2017, the Georgia PSC approved Georgia Power's decision to suspend work at the site due to changing economics, including lower load forecasts and fuel costs. The timing

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of recovery for costs incurred of approximately $50 million is expected to be determined by the Georgia PSC in the Georgia Power 2019 Base Rate Case.
On January 31, 2019, Georgia Power filed its triennial IRP (2019 IRP). The filing includes a request to decertify and retire Plant Hammond Units 1 through 4 ( 840 MWs) and Plant McIntosh Unit 1 ( 142.5 MWs) upon approval of the 2019 IRP .
In the 2019 IRP, Georgia Power requested approval to reclassify the remaining net book value of Plant Hammond Units 1 through 4 (approximately $520 million at December 31, 2018) upon retirement to a regulatory asset to be amortized ratably over a period equal to the applicable unit's remaining useful life through 2035. For Plant McIntosh Unit 1, Georgia Power requested approval to reclassify the remaining net book value (approximately $40 million at December 31, 2018) upon retirement to a regulatory asset to be amortized over a three -year period to be determined in the Georgia Power 2019 Base Rate Case. Georgia Power also requested approval to reclassify any unusable material and supplies inventory balances remaining at the applicable unit's retirement date to a regulatory asset for recovery over a period to be determined in the Georgia Power 2019 Base Rate Case.
The 2019 IRP also includes a request to certify approximately 25 MWs of capacity at Plant Scherer Unit 3 for the retail jurisdiction beginning January 1, 2020, following the expiration of a wholesale PPA.
The 2019 IRP also includes details regarding ARO costs associated with ash pond and landfill closures and post-closure care. Georgia Power requested the timing and rate of recovery of these costs be determined by the Georgia PSC in the Georgia Power 2019 Base Rate Case. See "Environmental Matters – Environmental Laws and Regulations – Coal Combustion Residuals" and FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements and Contractual Obligations" herein and Note 6 to the financial statements for additional information regarding Georgia Power's AROs.
Georgia Power also requested approval to issue two capacity-based requests for proposals (RFP). If approved, the first capacity-based RFP will seek resources that can provide capacity beginning in 2022 or 2023 and the second capacity-based RFP will seek resources that can provide capacity beginning in 2026, 2027, or 2028. Additionally, the 2019 IRP includes a request to procure an additional 1,000 MWs of renewable resources through a competitive bidding process. Georgia Power also proposed to invest in a portfolio of up to 50 MWs of battery energy storage technologies.
A decision from the Georgia PSC on the 2019 IRP is expected in mid-2019.
The ultimate outcome of these matters cannot be determined at this time.
Fuel Cost Recovery
Georgia Power has established fuel cost recovery rates approved by the Georgia PSC. On August 16, 2018, the Georgia PSC approved the deferral of Georgia Power's next fuel case to no later than March 16, 2020, with new rates, if any, to be effective June 1, 2020. Georgia Power continues to be allowed to adjust its fuel cost recovery rates under an interim fuel rider prior to the next fuel case if the under or over recovered fuel balance exceeds $200 million . At December 31, 2018, Georgia Power's under recovered fuel balance was $115 million .
Georgia Power's fuel cost recovery mechanism includes costs associated with a natural gas hedging program, as revised and approved by the Georgia PSC, allowing the use of an array of derivative instruments within a 48 -month time horizon.
Fuel cost recovery revenues as recorded on the financial statements are adjusted for differences in actual recoverable fuel costs and amounts billed in current regulated rates. Accordingly, changes in the billing factor will not have a significant effect on Georgia Power's revenues or net income, but will affect operating cash flows.
Storm Damage Recovery
Georgia Power is accruing $30 million annually through December 31, 2019, as provided in the 2013 ARP, for incremental operations and maintenance costs of damage from major storms to its transmission and distribution facilities. At December 31, 2018 , the total balance in the regulatory asset related to storm damage was $416 million . During October 2018, Hurricane Michael caused significant damage to Georgia Power's transmission and distribution facilities. The incremental restoration costs related to this hurricane deferred in the regulatory asset for storm damage totaled approximately $115 million . Hurricanes Irma and Matthew also caused significant damage to Georgia Power's transmission and distribution facilities during September 2017 and October 2016, respectively. The incremental restoration costs related to Hurricanes Irma and Matthew deferred in the regulatory asset for storm damage totaled approximately $250 million . The rate of storm damage cost recovery is expected to be adjusted as part of the Georgia Power 2019 Base Rate Case and further adjusted in future regulatory proceedings as necessary. The ultimate outcome of this matter cannot be determined at this time. See Note 2 to the financial statements under "Georgia Power – Storm Damage Recovery" for additional information regarding Georgia Power's storm damage reserve.

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Nuclear Construction
In 2009, the Georgia PSC certified construction of Plant Vogtle Units 3 and 4. Georgia Power holds a 45.7% ownership interest in Plant Vogtle Units 3 and 4. In 2012, the NRC issued the related combined construction and operating licenses, which allowed full construction of the two AP1000 nuclear units (with electric generating capacity of approximately 1,100 MWs each) and related facilities to begin. Until March 2017, construction on Plant Vogtle Units 3 and 4 continued under the Vogtle 3 and 4 Agreement, which was a substantially fixed price agreement. In March 2017, the EPC Contractor filed for bankruptcy protection under Chapter 11 of the U.S. Bankruptcy Code.
In connection with the EPC Contractor's bankruptcy filing, Georgia Power, acting for itself and as agent for the Vogtle Owners, entered into the Interim Assessment Agreement with the EPC Contractor to allow construction to continue. The Interim Assessment Agreement expired in July 2017 when Georgia Power, acting for itself and as agent for the other Vogtle Owners, and the EPC Contractor entered into the Vogtle Services Agreement. Under the Vogtle Services Agreement, Westinghouse provides facility design and engineering services, procurement and technical support, and staff augmentation on a time and materials cost basis. The Vogtle Services Agreement provides that it will continue until the start-up and testing of Plant Vogtle Units 3 and 4 are complete and electricity is generated and sold from both units. The Vogtle Services Agreement is terminable by the Vogtle Owners upon 30 days' written notice.
In October 2017, Georgia Power, acting for itself and as agent for the other Vogtle Owners, executed the Bechtel Agreement, a cost reimbursable plus fee arrangement, whereby Bechtel is reimbursed for actual costs plus a base fee and an at-risk fee, which is subject to adjustment based on Bechtel's performance against cost and schedule targets. Each Vogtle Owner is severally (not jointly) liable for its proportionate share, based on its ownership interest, of all amounts owed to Bechtel under the Bechtel Agreement. The Vogtle Owners may terminate the Bechtel Agreement at any time for their convenience, provided that the Vogtle Owners will be required to pay amounts related to work performed prior to the termination (including the applicable portion of the base fee), certain termination-related costs, and, at certain stages of the work, the applicable portion of the at-risk fee. Bechtel may terminate the Bechtel Agreement under certain circumstances, including certain Vogtle Owner suspensions of work, certain breaches of the Bechtel Agreement by the Vogtle Owners, Vogtle Owner insolvency, and certain other events. Pursuant to the Loan Guarantee Agreement between Georgia Power and the DOE, Georgia Power is required to obtain the DOE's approval of the Bechtel Agreement prior to obtaining any further advances under the Loan Guarantee Agreement.
Cost and Schedule
Georgia Power's approximate proportionate share of the remaining estimated capital cost to complete Plant Vogtle Units 3 and 4 by the expected in-service dates of November 2021 and November 2022, respectively, is as follows:
 
(in billions)
Base project capital cost forecast (a)(b)
$
8.0

Construction contingency estimate
0.4

Total project capital cost forecast (a)(b)
8.4

Net investment as of December 31, 2018 (b)
(4.6
)
Remaining estimate to complete (a)
$
3.8

(a)
Excludes financing costs expected to be capitalized through AFUDC of approximately $315 million .
(b)
Net of $1.7 billion received from Toshiba under the Guarantee Settlement Agreement and approximately $188 million in related Customer Refunds.
Georgia Power estimates that its financing costs for construction of Plant Vogtle Units 3 and 4 will total approximately $3.1 billion , of which $1.9 billion had been incurred through December 31, 2018 .
As construction continues, challenges with management of contractors, subcontractors, and vendors; labor productivity, availability, and/or cost escalation; procurement, fabrication, delivery, assembly, and/or installation and testing, including any required engineering changes, of plant systems, structures, and components (some of which are based on new technology that only recently began initial operation in the global nuclear industry at this scale); or other issues could arise and change the projected schedule and estimated cost. Monthly construction production targets required to maintain the current project schedule will continue to increase significantly throughout 2019. To meet these increasing monthly targets, existing craft construction productivity must improve and additional craft laborers must be retained and deployed.
Georgia Power and Southern Nuclear believe it is a leading practice in connection with a construction project of this size and complexity to periodically validate recent construction progress in comparison to the projected schedule and to verify and update quantities of commodities remaining to install, labor productivity, and forecasted staffing needs. This verification process, led by

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Southern Nuclear, was underway as of December 31, 2018 and is expected to be completed during the second quarter 2019. Georgia Power currently does not anticipate any material changes to the total estimated project capital cost forecast for Plant Vogtle Units 3 and 4 or the expected in-service dates of November 2021 and November 2022, respectively, resulting from this verification process. However, the ultimate impact on cost and schedule, if any, will not be known until the verification process is completed. Georgia Power is required to report the results and any project impacts to the Georgia PSC by May 15, 2019.
There have been technical and procedural challenges to the construction and licensing of Plant Vogtle Units 3 and 4 at the federal and state level and additional challenges may arise. Processes are in place that are designed to assure compliance with the requirements specified in the Westinghouse Design Control Document and the combined construction and operating licenses, including inspections by Southern Nuclear and the NRC that occur throughout construction. As a result of such compliance processes, certain license amendment requests have been filed and approved or are pending before the NRC. Various design and other licensing-based compliance matters, including the timely resolution of ITAAC and the related approvals by the NRC, may arise, which may result in additional license amendments or require other resolution. If any license amendment requests or other licensing-based compliance issues are not resolved in a timely manner, there may be delays in the project schedule that could result in increased costs.
The ultimate outcome of these matters cannot be determined at this time. However, any extension of the project schedule is currently estimated to result in additional base capital costs of approximately $50 million per month, based on Georgia Power's ownership interests, and AFUDC of approximately $12 million per month. While Georgia Power is not precluded from seeking recovery of any future capital cost forecast increase, management will ultimately determine whether or not to seek recovery. Any further changes to the capital cost forecast that are not expected to be recoverable through regulated rates will be required to be charged to income and such charges could be material.
Joint Owner Contracts
In November 2017, the Vogtle Owners entered into an amendment to their joint ownership agreements for Plant Vogtle Units 3 and 4 to provide for, among other conditions, additional Vogtle Owner approval requirements. Effective August 31, 2018, the Vogtle Owners further amended the joint ownership agreements to clarify and provide procedures for certain provisions of the joint ownership agreements related to adverse events that require the vote of the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 to continue construction (as amended, and together with the November 2017 amendment, the Vogtle Joint Ownership Agreements). The Vogtle Joint Ownership Agreements also confirm that the Vogtle Owners' sole recourse against Georgia Power or Southern Nuclear for any action or inaction in connection with their performance as agent for the Vogtle Owners is limited to removal of Georgia Power and/or Southern Nuclear as agent, except in cases of willful misconduct.
As a result of the increase in the total project capital cost forecast and Georgia Power's decision not to seek rate recovery of the increase in the base capital costs as described below, the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 were required to vote to continue construction. On September 26, 2018, the Vogtle Owners unanimously voted to continue construction of Plant Vogtle Units 3 and 4.
Amendments to the Vogtle Joint Ownership Agreements
In connection with the vote to continue construction, Georgia Power entered into (i) the Vogtle Owner Term Sheet with the other Vogtle Owners and MEAG's wholly-owned subsidiaries MEAG SPVJ, MEAG Power SPVM, LLC (MEAG SPVM), and MEAG Power SPVP, LLC (MEAG SPVP) to take certain actions which partially mitigate potential financial exposure for the other Vogtle Owners, including additional amendments to the Vogtle Joint Ownership Agreements and the purchase of PTCs from the other Vogtle Owners, and (ii) the MEAG Term Sheet with MEAG and MEAG SPVJ to provide funding with respect to MEAG SPVJ's ownership interest in Plant Vogtle Units 3 and 4 (Project J) under certain circumstances. On January 14, 2019, Georgia Power, MEAG, and MEAG SPVJ entered into an agreement to implement the provisions of the MEAG Term Sheet (MEAG Funding Agreement). On February 18, 2019, Georgia Power, the other Vogtle Owners, and MEAG's wholly-owned subsidiaries MEAG SPVJ, MEAG SPVM, and MEAG SPVP entered into certain amendments to the Vogtle Joint Ownership Agreements to implement the provisions of the Vogtle Owner Term Sheet (Global Amendments).
Pursuant to the Global Amendments, and consistent with the Vogtle Owner Term Sheet, the Vogtle Joint Ownership Agreements were modified as follows: (i) each Vogtle Owner must pay its proportionate share of qualifying construction costs for Plant Vogtle Units 3 and 4 based on its ownership percentage up to the estimated cost at completion (EAC) for Plant Vogtle Units 3 and 4 which formed the basis of Georgia Power's forecast of $8.4 billion in the nineteenth VCM plus $800 million ; (ii) Georgia Power will be responsible for 55.7% of actual qualifying construction costs between $800 million and $1.6 billion over the EAC in the nineteenth VCM (resulting in $80 million of potential additional costs to Georgia Power), with the remaining Vogtle Owners responsible for 44.3% of such costs pro rata in accordance with their respective ownership interests; and (iii) Georgia Power will be responsible for 65.7% of qualifying construction costs between $1.6 billion and $2.1 billion over the EAC in the nineteenth

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VCM (resulting in a further $100 million of potential additional costs to Georgia Power), with the remaining Vogtle Owners responsible for 34.3% of such costs pro rata in accordance with their respective ownership interests.
If the EAC is revised and exceeds the EAC in the nineteenth VCM by more than $2.1 billion , each of the other Vogtle Owners will have a one-time option at the time the project budget forecast is so revised to tender a portion of its ownership interest to Georgia Power in exchange for Georgia Power's agreement to pay 100% of such Vogtle Owner's remaining share of total construction costs in excess of the EAC in the nineteenth VCM plus $2.1 billion . In this event, Georgia Power will have the option of cancelling the project in lieu of purchasing a portion of the ownership interest of any other Vogtle Owner. If Georgia Power accepts the offer to purchase a portion of another Vogtle Owner's ownership interest in Plant Vogtle Units 3 and 4, the ownership interest(s) to be conveyed from the tendering Vogtle Owner(s) to Georgia Power will be calculated based on the proportion of the cumulative amount of construction costs paid by each such tendering Vogtle Owner(s) and by Georgia Power as of the COD of Plant Vogtle Unit 4. For purposes of this calculation, payments made by Georgia Power on behalf of another Vogtle Owner in accordance with the second and third items described in the paragraph above will be treated as payments made by the applicable Vogtle Owner.
In the event the actual costs of construction at completion of a Unit are less than the EAC reflected in the nineteenth VCM report and such Unit is placed in service in accordance with the schedule projected in the nineteenth VCM report (i.e., Plant Vogtle Unit 3 is placed in service by November 2021 or Plant Vogtle Unit 4 is placed in service by November 2022), Georgia Power will be entitled to 60.7% of the cost savings with respect to the relevant Unit and the remaining Vogtle Owners will be entitled to 39.3% of such savings on a pro rata basis in accordance with their respective ownership interests.
For purposes of the foregoing provisions, qualifying construction costs will not include costs (i) resulting from force majeure events, including governmental actions or inactions (or significant delays associated with issuance of such actions) that affect the licensing, completion, start-up, operations, or financing of Plant Vogtle Units 3 and 4, administrative proceedings or litigation regarding ITAAC or other regulatory challenges to commencement of operation of Plant Vogtle Units 3 and 4, and changes in laws or regulations governing Plant Vogtle Units 3 and 4, (ii) legal fees and legal expenses incurred due to litigation with contractors or subcontractors that are not subsidiaries or affiliates of Southern Company, and (iii) additional costs caused by requests from the Vogtle Owners other than Georgia Power, except for the exercise of a right to vote granted under the Vogtle Joint Ownership Agreements, that increase costs by $100,000 or more.
Pursuant to the Global Amendments, and consistent with the Vogtle Owner Term Sheet, the provisions of the Vogtle Joint Ownership Agreements requiring that Vogtle Owners holding 90% of the ownership interests in Plant Vogtle Units 3 and 4 vote to continue construction following certain adverse events (Project Adverse Events) were modified. Pursuant to the Global Amendments, the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 must vote to continue construction if certain Project Adverse Events occur, including: (i) the bankruptcy of Toshiba; (ii) the termination or rejection in bankruptcy of certain agreements, including the Vogtle Services Agreement, the Bechtel Agreement, or the agency agreement with Southern Nuclear; (iii) Georgia Power publicly announces its intention not to submit for rate recovery any portion of its investment in Plant Vogtle Units 3 and 4 or the Georgia PSC determines that any of Georgia Power's costs relating to the construction of Plant Vogtle Units 3 and 4 will not be recovered in retail rates, excluding any additional amounts paid by Georgia Power on behalf of the other Vogtle Owners pursuant to the Global Amendments described above and the first 6% of costs during any six -month VCM reporting period that are disallowed by the Georgia PSC for recovery, or for which Georgia Power elects not to seek cost recovery, through retail rates; and (iv) an incremental extension of one year or more over the most recently approved schedule. Under the Global Amendments, Georgia Power may cancel the project at any time in its sole discretion.
In addition, pursuant to the Vogtle Joint Ownership Agreements, the required approval of holders of ownership interests in Plant Vogtle Units 3 and 4 is at least (i) 90% for a change of the primary construction contractor and (ii) 67% for material amendments to the Vogtle Services Agreement or agreements with Southern Nuclear or the primary construction contractor, including the Bechtel Agreement.
The Global Amendments provide that if the holders of at least 90% of the ownership interests fail to vote in favor of continuing the project following any future Project Adverse Event, work on Plant Vogtle Units 3 and 4 will continue for a period of 30 days if the holders of more than 50% of the ownership interests vote in favor of continuing construction (Majority Voting Owners). In such a case, the Vogtle Owners (i) have agreed to negotiate in good faith towards the resumption of the project, (ii) if no agreement is reached during such 30 -day period, the project will be cancelled, and (iii) in the event of such a cancellation, the Majority Voting Owners will be obligated to reimburse any other Vogtle Owner for the incremental costs it incurred during such 30 -day negotiation period.

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Purchase of PTCs During Commercial Operation
Pursuant to the Global Amendments, and consistent with the Vogtle Owner Term Sheet, Georgia Power has agreed to purchase additional PTCs from OPC, Dalton, MEAG SPVM, MEAG SPVP, and MEAG SPVJ (to the extent any MEAG SPVJ PTC rights remain after any purchases required under the MEAG Funding Agreement as described below) at varying purchase prices dependent upon the actual cost to complete construction of Plant Vogtle Units 3 and 4 as compared to the EAC reflected in the nineteenth VCM report. The purchases are at the option of the applicable Vogtle Owner.
Potential Funding to MEAG Project J
Pursuant to the MEAG Funding Agreement, and consistent with the MEAG Term Sheet, if MEAG SPVJ is unable to make its payments due under the Vogtle Joint Ownership Agreements solely as a result of the occurrence of one of the following situations that materially impedes access to capital markets for MEAG for Project J: (i) the conduct of JEA or the City of Jacksonville, such as JEA's legal challenges of its obligations under a PPA with MEAG (PPA-J), or (ii) PPA-J is declared void by a court of competent jurisdiction or rejected by JEA under the applicable provisions of the U.S. Bankruptcy Code (each of (i) and (ii), a JEA Default), at MEAG's request, Georgia Power will purchase from MEAG SPVJ the rights to PTCs attributable to MEAG SPVJ's share of Plant Vogtle Units 3 and 4 (approximately 206 MWs) within 30 days of such request at varying prices dependent upon the stage of construction of Plant Vogtle Units 3 and 4. The aggregate purchase price of the PTCs, together with any advances made as described in the next paragraph, shall not exceed $300 million .
At the option of MEAG, as an alternative or supplement to Georgia Power's purchase of PTCs as described above, Georgia Power has agreed to provide up to $250 million in funding to MEAG for Project J in the form of advances (either advances under the Vogtle Joint Ownership Agreements or the purchase of MEAG Project J bonds, at the discretion of Georgia Power), subject to any required approvals of the Georgia PSC and the DOE.
In the event MEAG SPVJ certifies to Georgia Power that it is unable to fund its obligations under the Vogtle Joint Ownership Agreements as a result of a JEA Default and Georgia Power becomes obligated to provide funding as described above, MEAG is required to (i) assign to Georgia Power its right to vote on any future Project Adverse Event and (ii) diligently pursue JEA for its breach of PPA-J. In addition, Georgia Power agreed that it will not sue MEAG for any amounts due from MEAG SPVJ under MEAG's guarantee of MEAG SPVJ's obligations so long as MEAG SPVJ complies with the terms of the MEAG Funding Agreement as to its payment obligations and the other non-payment provisions of the Vogtle Joint Ownership Agreements.
Under the terms of the MEAG Funding Agreement, Georgia Power may cancel the project in lieu of providing funding in the form of advances or PTC purchases.
The ultimate outcome of these matters cannot be determined at this time.
Regulatory Matters
In 2009, the Georgia PSC voted to certify construction of Plant Vogtle Units 3 and 4 with a certified capital cost of $4.418 billion . In addition, in 2009 the Georgia PSC approved inclusion of the Plant Vogtle Units 3 and 4 related CWIP accounts in rate base, and the State of Georgia enacted the Georgia Nuclear Energy Financing Act, which allows Georgia Power to recover financing costs for Plant Vogtle Units 3 and 4. Financing costs are recovered on all applicable certified costs through annual adjustments to the NCCR tariff up to the certified capital cost of $4.418 billion . At December 31, 2018 , Georgia Power had recovered approximately $1.9 billion of financing costs. Financing costs related to capital costs above $4.418 billion will be recovered through AFUDC; however, Georgia Power will not record AFUDC related to any capital costs in excess of the total deemed reasonable by the Georgia PSC (currently $7.3 billion ) and not requested for rate recovery. On December 18, 2018, the Georgia PSC approved Georgia Power's request to increase the NCCR tariff by $88 million annually, effective January 1, 2019.
Georgia Power is required to file semi-annual VCM reports with the Georgia PSC by February 28 and August 31 of each year. In 2013, in connection with the eighth VCM report, the Georgia PSC approved a stipulation between Georgia Power and the staff of the Georgia PSC to waive the requirement to amend the Plant Vogtle Units 3 and 4 certificate in accordance with the 2009 certification order until the completion of Plant Vogtle Unit 3, or earlier if deemed appropriate by the Georgia PSC and Georgia Power.
In 2016, the Georgia PSC voted to approve a settlement agreement (Vogtle Cost Settlement Agreement) resolving certain prudency matters in connection with the fifteenth VCM report. In December 2017, the Georgia PSC voted to approve (and issued its related order on January 11, 2018) Georgia Power's seventeenth VCM report, which included a recommendation to continue construction with Southern Nuclear as project manager and Bechtel serving as the primary construction contractor, and modified the Vogtle Cost Settlement Agreement. The Vogtle Cost Settlement Agreement, as modified by the January 11, 2018 order, resolved the following regulatory matters related to Plant Vogtle Units 3 and 4: (i) none of the $3.3 billion of costs incurred

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through December 31, 2015 and reflected in the fourteenth VCM report should be disallowed from rate base on the basis of imprudence; (ii) the Contractor Settlement Agreement was reasonable and prudent and none of the amounts paid pursuant to the Contractor Settlement Agreement should be disallowed from rate base on the basis of imprudence; (iii) (a) capital costs incurred up to $5.68 billion would be presumed to be reasonable and prudent with the burden of proof on any party challenging such costs, (b) Georgia Power would have the burden to show that any capital costs above $5.68 billion were prudent, and (c) a revised capital cost forecast of $7.3 billion (after reflecting the impact of payments received under the Guarantee Settlement Agreement and related Customer Refunds) was found reasonable; (iv) construction of Plant Vogtle Units 3 and 4 should be completed, with Southern Nuclear serving as project manager and Bechtel as primary contractor; (v) approved and deemed reasonable Georgia Power's revised schedule placing Plant Vogtle Units 3 and 4 in service in November 2021 and November 2022, respectively; (vi) confirmed that the revised cost forecast does not represent a cost cap and that prudence decisions on cost recovery will be made at a later date, consistent with applicable Georgia law; (vii) reduced the ROE used to calculate the NCCR tariff (a) from 10.95% (the ROE rate setting point authorized by the Georgia PSC in the 2013 ARP) to 10.00% effective January 1, 2016, (b) from 10.00% to 8.30% , effective January 1, 2020, and (c) from 8.30% to 5.30% , effective January 1, 2021 (provided that the ROE in no case will be less than Georgia Power's average cost of long-term debt); (viii) reduced the ROE used for AFUDC equity for Plant Vogtle Units 3 and 4 from 10.00% to Georgia Power's average cost of long-term debt, effective January 1, 2018; and (ix) agreed that upon Unit 3 reaching commercial operation, retail base rates would be adjusted to include carrying costs on those capital costs deemed prudent in the Vogtle Cost Settlement Agreement. The January 11, 2018 order also stated that if Plant Vogtle Units 3 and 4 are not commercially operational by June 1, 2021 and June 1, 2022, respectively, the ROE used to calculate the NCCR tariff will be further reduced by 10 basis points each month (but not lower than Georgia Power's average cost of long-term debt) until the respective Unit is commercially operational. The ROE reductions negatively impacted earnings by approximately $100 million , $25 million , and $20 million in 2018, 2017, and 2016, respectively, and are estimated to have negative earnings impacts of approximately $75 million in 2019 and an aggregate of approximately $615 million from 2020 to 2022.
In its January 11, 2018 order, the Georgia PSC also stated if other conditions change and assumptions upon which Georgia Power's seventeenth VCM report are based do not materialize, the Georgia PSC reserved the right to reconsider the decision to continue construction.
On February 12, 2018, Georgia Interfaith Power & Light, Inc. (GIPL) and Partnership for Southern Equity, Inc. (PSE) filed a petition appealing the Georgia PSC's January 11, 2018 order with the Fulton County Superior Court. On March 8, 2018, Georgia Watch filed a similar appeal to the Fulton County Superior Court for judicial review of the Georgia PSC's decision and denial of Georgia Watch's motion for reconsideration. On December 21, 2018, the Fulton County Superior Court granted Georgia Power's motion to dismiss the two appeals. On January 9, 2019, GIPL, PSE, and Georgia Watch filed an appeal of this decision with the Georgia Court of Appeals. Georgia Power believes the appeal has no merit; however, an adverse outcome in the appeal combined with subsequent adverse action by the Georgia PSC could have a material impact on Georgia Power's results of operations, financial condition, and liquidity.
In preparation for its nineteenth VCM filing, Georgia Power requested Southern Nuclear to perform a full cost reforecast for the project. This reforecast, performed prior to the nineteenth VCM filing, resulted in a $0.7 billion increase to the base capital cost forecast reported in the second quarter 2018. This base cost increase primarily resulted from changed assumptions related to the finalization of contract scopes and management responsibilities for Bechtel and over 60 subcontractors, labor productivity rates, and craft labor incentives, as well as the related levels of project management, oversight, and support, including field supervision and engineering support.
Although Georgia Power believes these incremental costs are reasonable and necessary to complete the project and the Georgia PSC's order in the seventeenth VCM proceeding specifically states that the construction of Plant Vogtle Units 3 and 4 is not subject to a cost cap, Georgia Power did not seek rate recovery for these cost increases included in the current base capital cost forecast (or any related financing costs) in the nineteenth VCM report. In connection with future VCM filings, Georgia Power may request the Georgia PSC to evaluate costs currently included in the construction contingency estimate for rate recovery as and when they are appropriately included in the base capital cost forecast. After considering the significant level of uncertainty that exists regarding the future recoverability of costs included in the construction contingency estimate since the ultimate outcome of these matters is subject to the outcome of future assessments by management, as well as Georgia PSC decisions in these future regulatory proceedings, Georgia Power recorded a total pre-tax charge to income of $1.1 billion ( $0.8 billion after tax) in the second quarter 2018, which includes the total increase in the base capital cost forecast and construction contingency estimate.
On August 31, 2018, Georgia Power filed its nineteenth VCM report with the Georgia PSC, which requested approval of $578 million of construction capital costs incurred from January 1, 2018 through June 30, 2018. On February 19, 2019, the Georgia PSC approved the nineteenth VCM, but deferred approval of $51.6 million of expenditures related to Georgia Power's portion of

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an administrative claim filed in the Westinghouse bankruptcy proceedings. Through the nineteenth VCM, the Georgia PSC has approved total construction capital costs incurred through June 30, 2018 of $5.4 billion (before $1.7 billion of payments received under the Guarantee Settlement Agreement and approximately $188 million in related Customer Refunds). In addition, the staff of the Georgia PSC requested, and Georgia Power agreed, to file its twentieth VCM report concurrently with the twenty-first VCM report by August 31, 2019.
The ultimate outcome of these matters cannot be determined at this time.
DOE Financing
At December 31, 2018 , Georgia Power had borrowed $2.6 billion related to Plant Vogtle Units 3 and 4 costs through the Loan Guarantee Agreement and a multi-advance credit facility among Georgia Power, the DOE, and the FFB, which provides for borrowings of up to $3.46 billion , subject to the satisfaction of certain conditions. In September 2017, the DOE issued a conditional commitment to Georgia Power for up to approximately $1.67 billion in additional guaranteed loans under the Loan Guarantee Agreement. In September 2018, the DOE extended the conditional commitment to March 31, 2019 . Any further extension must be approved by the DOE. Final approval and issuance of these additional loan guarantees by the DOE cannot be assured and are subject to the negotiation of definitive agreements, completion of due diligence by the DOE, receipt of any necessary regulatory approvals, and satisfaction of other conditions. See Note 8 to the financial statements under "Long-term Debt – DOE Loan Guarantee Borrowings" for additional information, including applicable covenants, events of default, mandatory prepayment events (including any decision not to continue construction of Plant Vogtle Units 3 and 4), and conditions to borrowing.
The ultimate outcome of these matters cannot be determined at this time.
Income Tax Matters
Federal Tax Reform Legislation
In December 2017, the Tax Reform Legislation was signed into law and became effective on January 1, 2018. The Tax Reform Legislation, among other things, reduced the federal corporate income tax rate to 21%, retained normalization provisions for public utility property and existing renewable energy incentives, and repealed the corporate alternative minimum tax. In addition, under the Tax Reform Legislation, net operating losses generated after December 31, 2017 can no longer be carried back to previous tax years but can be carried forward indefinitely, with utilization limited to 80% of taxable income of the subsequent tax year. The projected reduction of Southern Company's consolidated income tax liability resulting from the tax rate reduction also delays the expected utilization of existing tax credit carryforwards at Georgia Power. See Note 10 to the financial statements for information on Southern Company's joint consolidated income tax allocation agreement.
Following the enactment of the Tax Reform Legislation, the SEC staff issued Staff Accounting Bulletin 118 – "Income Tax Accounting Implications of the Tax Cuts and Jobs Act" (SAB 118), which provided for a measurement period of up to one year from the enactment date to complete accounting under GAAP for the tax effects of the legislation. Due to the complex and comprehensive nature of the enacted tax law changes and their application under GAAP, Georgia Power considered all amounts recorded in the financial statements as a result of the Tax Reform Legislation "provisional" as discussed in SAB 118 and subject to revision prior to filing its 2017 tax return in the fourth quarter 2018. Georgia Power recognized tax benefits of $50 million and $8 million in 2018 and 2017, respectively, for a total of $58 million as a result of the Tax Reform Legislation. In addition, in total, Georgia Power recorded a $147 million decrease in regulatory assets and a $3.0 billion increase in regulatory liabilities as a result of the Tax Reform Legislation and $2 million of stranded excess deferred tax balances in AOCI at December 31, 2017 were adjusted through retained earnings in 2018. As of December 31, 2018, Georgia Power considered the measurement of impacts from the Tax Reform Legislation on deferred income tax assets and liabilities, primarily due to the impact of the reduction of the corporate income tax rate, to be complete.
However, the IRS continues to issue regulations that provide further interpretation and guidance on the law and each state's adoption of the provisions contained in the Tax Reform Legislation remains uncertain. The ultimate impact of this matter cannot be determined at this time. See Note 2 to the financial statements under "Georgia Power – Rate Plans" for additional information regarding the Georgia Power Tax Reform Settlement Agreement. The regulatory treatment of certain impacts of the Tax Reform Legislation remains subject to the discretion of the Georgia PSC in the Georgia Power 2019 Base Rate Case and the FERC. Also, see FINANCIAL CONDITION AND LIQUIDITY – "Credit Rating Risk" herein and Note 10 to the financial statements under "Current and Deferred Income Taxes" for additional information.

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Bonus Depreciation
Under the Tax Reform Legislation, projects with binding contracts prior to September 28, 2017 and placed in service after September 27, 2017 remain eligible for bonus depreciation under the PATH Act. The PATH Act allowed for 50% bonus depreciation for 2015 through 2017, 40% bonus depreciation for 2018, and 30% bonus depreciation for 2019 and certain long-lived assets placed in service in 2020. Based on provisional estimates, bonus depreciation is expected to result in positive cash flows of approximately $80 million for the 2018 tax year and approximately $30 million for the 2019 tax year. The ultimate outcome of this matter cannot be determined at this time.
Other Matters
Georgia Power is involved in various other matters being litigated and regulatory matters that could affect future earnings. In addition, Georgia Power is subject to certain claims and legal actions arising in the ordinary course of business. Georgia Power's business activities are subject to extensive governmental regulation related to public health and the environment, such as laws and regulations governing air, water, land, and protection of other natural resources. Litigation over environmental issues and claims of various types, including property damage, personal injury, common law nuisance, and citizen enforcement of environmental laws and regulations, has occurred throughout the U.S. This litigation has included claims for damages alleged to have been caused by CO 2 and other emissions, CCR, and alleged exposure to hazardous materials, and/or requests for injunctive relief in connection with such matters.
The ultimate outcome of such pending or potential litigation or regulatory matters cannot be predicted at this time; however, for current proceedings not specifically reported herein or in Notes 2 and 3 to the financial statements, management does not anticipate that the ultimate liabilities, if any, arising from such current proceedings would have a material effect on Georgia Power's financial statements. See Notes 2 and 3 to the financial statements for a discussion of various other contingencies, regulatory matters, and other matters being litigated which may affect future earnings potential.
ACCOUNTING POLICIES
Application of Critical Accounting Policies and Estimates
Georgia Power prepares its financial statements in accordance with GAAP. Significant accounting policies are described in Notes 1 , 5 , and 6 to the financial statements. In the application of these policies, certain estimates are made that may have a material impact on Georgia Power's results of operations and related disclosures. Different assumptions and measurements could produce estimates that are significantly different from those recorded in the financial statements. Senior management has reviewed and discussed the following critical accounting policies and estimates with the Audit Committee of Southern Company's Board of Directors.
Utility Regulation
Georgia Power is subject to retail regulation by the Georgia PSC and wholesale regulation by the FERC. These regulatory agencies set the rates Georgia Power is permitted to charge customers based on allowable costs. As a result, Georgia Power applies accounting standards which require the financial statements to reflect the effects of rate regulation. Through the ratemaking process, the regulators may require the inclusion of costs or revenues in periods different than when they would be recognized by a non-regulated company. This treatment may result in the deferral of expenses and the recording of related regulatory assets based on anticipated future recovery through rates or the deferral of gains or creation of liabilities and the recording of related regulatory liabilities. The application of the accounting standards has a further effect on Georgia Power's financial statements as a result of the estimates of allowable costs used in the ratemaking process. These estimates may differ from those actually incurred by Georgia Power; therefore, the accounting estimates inherent in specific costs such as depreciation, AROs, and pension and other postretirement benefits have less of a direct impact on Georgia Power's results of operations and financial condition than they would on a non-regulated company.
As reflected in Note 2 to the financial statements under " Georgia Power Regulatory Assets and Liabilities ," significant regulatory assets and liabilities have been recorded. Management reviews the ultimate recoverability of these regulatory assets and any requirement to refund these regulatory liabilities based on applicable regulatory guidelines and GAAP. However, adverse legislative, judicial, or regulatory actions could materially impact the amounts of such regulatory assets and liabilities and could adversely impact Georgia Power's financial statements.
Estimated Cost, Schedule, and Rate Recovery for the Construction of Plant Vogtle Units 3 and 4
In 2016, the Georgia PSC approved the Vogtle Cost Settlement Agreement, which resolved certain prudency matters in connection with Georgia Power's fifteenth VCM report. In December 2017, the Georgia PSC approved Georgia Power's seventeenth VCM

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report, which included a recommendation to continue construction of Plant Vogtle Units 3 and 4, with Southern Nuclear serving as project manager and Bechtel serving as the primary construction contractor, as well as a modification of the Vogtle Cost Settlement Agreement. The Georgia PSC's related order stated that under the modified Vogtle Cost Settlement Agreement, (i) none of the $3.3 billion of costs incurred through December 31, 2015 should be disallowed as imprudent; (ii) capital costs incurred up to $5.68 billion would be presumed to be reasonable and prudent with the burden of proof on any party challenging such costs; (iii) Georgia Power would have the burden of proof to show that any capital costs above $5.68 billion were prudent; (iv) Georgia Power's total project capital cost forecast of $7.3 billion (net of $1.7 billion received under the Guarantee Settlement Agreement and approximately $188 million in related Customer Refunds) was found reasonable and did not represent a cost cap; and (v) prudence decisions would be made subsequent to achieving fuel load for Unit 4.
In its order, the Georgia PSC also stated if other conditions change and assumptions upon which Georgia Power's seventeenth VCM report are based do not materialize, the Georgia PSC reserved the right to reconsider the decision to continue construction.
In the second quarter 2018, Georgia Power revised its base cost forecast and estimated contingency to complete construction and start-up of Plant Vogtle Units 3 and 4 to $8.0 billion and $0.4 billion , respectively, for a total project capital cost forecast of $8.4 billion (net of $1.7 billion received under the Guarantee Settlement Agreement and approximately $188 million in related Customer Refunds). Although Georgia Power believes these incremental costs are reasonable and necessary to complete the project and the Georgia PSC's order in the seventeenth VCM proceeding specifically states that the construction of Plant Vogtle Units 3 and 4 is not subject to a cost cap, Georgia Power did not seek rate recovery for the $0.7 billion increase in costs included in the current base capital cost forecast in the nineteenth VCM report. In connection with future VCM filings, Georgia Power may request the Georgia PSC to evaluate costs currently included in the construction contingency estimate for rate recovery as and when they are appropriately included in the base capital cost forecast. After considering the significant level of uncertainty that exists regarding the future recoverability of costs included in the construction contingency estimate since the ultimate outcome of these matters is subject to the outcome of future assessments by management, as well as Georgia PSC decisions in these future regulatory proceedings, Georgia Power recorded a total pre-tax charge to income of $1.1 billion ( $0.8 billion after tax) in the second quarter 2018.
Georgia Power's revised cost estimate reflects an expected in-service date of November 2021 for Unit 3 and November 2022 for Unit 4.
As construction continues, challenges with management of contractors, subcontractors, and vendors; labor productivity, availability, and/or cost escalation; procurement, fabrication, delivery, assembly, and/or installation and testing, including any required engineering changes, of plant systems, structures, and components (some of which are based on new technology that only recently began initial operation in the global nuclear industry at this scale); or other issues could arise and change the projected schedule and estimated cost. Monthly construction production targets required to maintain the current project schedule will continue to increase significantly throughout 2019. To meet these increasing monthly targets, existing craft construction productivity must improve and additional craft laborers must be retained and deployed.
Georgia Power and Southern Nuclear believe it is a leading practice in connection with a construction project of this size and complexity to periodically validate recent construction progress in comparison to the projected schedule and to verify and update quantities of commodities remaining to install, labor productivity, and forecasted staffing needs. This verification process, led by Southern Nuclear, was underway as of December 31, 2018 and is expected to be completed during the second quarter 2019. Georgia Power currently does not anticipate any material changes to the total estimated project capital cost forecast for Plant Vogtle Units 3 and 4 or the expected in-service dates of November 2021 and November 2022, respectively, resulting from this verification process. However, the ultimate impact on cost and schedule, if any, will not be known until the verification process is completed. Georgia Power is required to report the results and any project impacts to the Georgia PSC by May 15, 2019.
There have been technical and procedural challenges to the construction and licensing of Plant Vogtle Units 3 and 4 at the federal and state level and additional challenges may arise. Processes are in place that are designed to assure compliance with the requirements specified in the Westinghouse Design Control Document and the combined construction and operating licenses, including inspections by Southern Nuclear and the NRC that occur throughout construction. As a result of such compliance processes, certain license amendment requests have been filed and approved or are pending before the NRC. Various design and other licensing-based compliance matters, including the timely resolution of ITAAC and the related approvals by the NRC, may arise, which may result in additional license amendments or require other resolution. If any license amendment requests or other licensing-based compliance issues are not resolved in a timely manner, there may be delays in the project schedule that could result in increased costs.
The ultimate outcome of these matters cannot be determined at this time. Any extension of the in-service dates of November 2021 for Unit 3 and November 2022 for Unit 4 is currently estimated to result in additional base capital costs of approximately $50 million per month, based on Georgia Power's ownership interests, and AFUDC of approximately $12 million per month. While

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Georgia Power Company 2018 Annual Report

Georgia Power is not precluded from seeking recovery of any future capital cost forecast increase, management will ultimately determine whether or not to seek recovery. Any further changes to the capital cost forecast that are not expected to be recoverable through regulated rates will be required to be charged to income and such charges could be material.
Given the significant complexity involved in estimating the future costs to complete construction and start-up of Plant Vogtle Units 3 and 4 and the significant management judgment necessary to assess the related uncertainties surrounding future rate recovery of any projected cost increases, as well as the potential impact on Georgia Power's results of operations and cash flows, Georgia Power considers these items to be critical accounting estimates. See Note 2 to the financial statements under "Georgia Power – Nuclear Construction" for additional information.
Asset Retirement Obligations
AROs are computed as the fair value of the estimated costs for an asset's future retirement and are recorded in the period in which the liability is incurred. The estimated costs are capitalized as part of the related long-lived asset and depreciated over the asset's useful life. In the absence of quoted market prices, AROs are estimated using present value techniques in which estimates of future cash outlays associated with the asset retirements are discounted using a credit-adjusted risk-free rate. Estimates of the timing and amounts of future cash outlays are based on projections of when and how the assets will be retired and the cost of future removal activities.
The liability for AROs primarily relates to the decommissioning of Georgia Power's nuclear facilities, which include Georgia Power's ownership interests in Plant Hatch and Plant Vogtle Units 1 and 2, and facilities that are subject to the CCR Rule and the related state rule, principally ash ponds. In addition, Georgia Power has AROs related to various landfill sites, underground storage tanks, and asbestos removal.
Georgia Power also has identified retirement obligations related to certain transmission and distribution facilities, including the disposal of polychlorinated biphenyls in certain transformers; leasehold improvements; equipment on customer property; and property associated with Georgia Power's rail lines and natural gas pipelines. However, liabilities for the removal of these assets have not been recorded because the settlement timing for the retirement obligations related to these assets is indeterminable and, therefore, the fair value of the retirement obligations cannot be reasonably estimated. A liability for these retirement obligations will be recognized when sufficient information becomes available to support a reasonable estimation of the retirement obligation.
Georgia Power previously recorded AROs as a result of state requirements in Georgia which closely align with the requirements of the CCR Rule discussed above. The cost estimates for AROs related to the disposal of CCR are based on information using various assumptions related to closure and post-closure costs, timing of future cash outlays, inflation and discount rates, and the potential methods for complying with the CCR Rule and the related state rule. In December 2018, Georgia Power recorded an increase of approximately $3.1 billion to its AROs related to the disposal of CCR as a result of a strategic assessment which indicated additional closure costs will be required to close the ash ponds, primarily due to changes in closure strategies, the estimated amount of ash to be excavated, and additional water management requirements necessary to support closure strategies. Also in December 2018, Georgia Power recorded an increase of approximately $130 million to its AROs as a result of updated decommissioning cost site studies for Plant Hatch and Plant Vogtle Units 1 and 2. Georgia Power expects to periodically update its ARO cost estimates. See FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Laws and Regulations – Coal Combustion Residuals" herein and Note 6 to the financial statements for additional information.
Given the significant judgment involved in estimating AROs, Georgia Power considers the liabilities for AROs to be critical accounting estimates.
Pension and Other Postretirement Benefits
Georgia Power's calculation of pension and other postretirement benefits expense is dependent on a number of assumptions. These assumptions include discount rates, healthcare cost trend rates, expected long-term return on plan assets, mortality rates, expected salary and wage increases, and other factors. Components of pension and other postretirement benefits expense include interest and service cost on the pension and other postretirement benefit plans, expected return on plan assets, and amortization of certain unrecognized costs and obligations. Actual results that differ from the assumptions utilized are accumulated and amortized over future periods and, therefore, generally affect recognized expense and the recorded obligation in future periods. While Georgia Power believes that the assumptions used are appropriate, differences in actual experience or significant changes in assumptions would affect its pension and other postretirement benefit costs and obligations.
Key elements in determining Georgia Power's pension and other postretirement benefit expense are the expected long-term return on plan assets and the discount rate used to measure the benefit plan obligations and the periodic benefit plan expense for future periods. The expected long-term return on pension and other postretirement benefit plan assets is based on Southern Company's investment strategy, historical experience, and expectations for long-term rates of return that consider external actuarial advice.

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Georgia Power Company 2018 Annual Report

Southern Company determines the long-term return on plan assets by applying the long-term rate of expected returns on various asset classes to Southern Company's target asset allocation. For purposes of determining Georgia Power's liability related to the pension and other postretirement benefit plans, Southern Company discounts the future related cash flows using a single-point discount rate for each plan developed from the weighted average of market-observed yields for high quality fixed income securities with maturities that correspond to expected benefit payments.
A 25 basis point change in any significant assumption (discount rate, salary increases, or long-term rate of return on plan assets) would result in a $10 million or less change in total annual benefit expense, a $128 million or less change in the projected obligation for the pension plan, and an $18 million or less change in the projected obligation for other postretirement benefit plans.
See Note 11 to the financial statements for additional information regarding pension and other postretirement benefits.
Contingent Obligations
Georgia Power is subject to a number of federal and state laws and regulations, as well as other factors and conditions that subject it to environmental, litigation, and other risks. See FUTURE EARNINGS POTENTIAL herein and Notes 2 and 3 to the financial statements for more information regarding certain of these contingencies. Georgia Power periodically evaluates its exposure to such risks and records reserves for those matters where a non-tax-related loss is considered probable and reasonably estimable. The adequacy of reserves can be significantly affected by external events or conditions that can be unpredictable; thus, the ultimate outcome of such matters could materially affect Georgia Power's results of operations, cash flows, or financial condition.
Recently Issued Accounting Standards
See Note 1 to the financial statements under " Recently Adopted Accounting Standards " for additional information.
In 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 requires lessees to recognize on the balance sheet a lease liability and a right-of-use asset for all leases. ASU 2016-02 also changes the recognition, measurement, and presentation of expense associated with leases and provides clarification regarding the identification of certain components of contracts that would represent a lease. The accounting required by lessors is relatively unchanged . ASU 2016-02 is effective for fiscal years beginning after December 15, 2018 and Georgia Power adopted the new standard effective January 1, 2019.
Georgia Power elected the transition methodology provided by ASU No. 2018-11, Leases (Topic 842): Targeted Improvements , whereby the requirements of ASU 2016-02 are applied on a prospective basis as of the adoption date of January 1, 2019, without restating prior periods. Georgia Power elected the package of practical expedients provided by ASU 2016-02 that allows prior determinations of whether existing contracts are, or contain, leases and the classification of existing leases to continue without reassessment. Additionally, Georgia Power applied the use-of-hindsight practical expedient in determining lease terms as of the date of adoption and elected the practical expedient that allows existing land easements not previously accounted for as leases not to be reassessed. Georgia Power also made accounting policy elections to account for short-term leases in all asset classes as off-balance sheet leases and combined lease and non-lease components in the computations of lease obligations and right-of-use assets for most asset classes.
Georgia Power completed the implementation of a new application to track and account for its leases and updated its internal controls and accounting policies to support the accounting for leases under ASU 2016-02. Georgia Power completed its lease inventory and determined its most significant leases involve PPAs and real estate. In the first quarter 2019, the adoption of ASU 2016-02 resulted in recording lease liabilities and right-of-use assets on Georgia Power's balance sheet each totaling approximately $1.5 billion , with no impact on Georgia Power's statement of income.
FINANCIAL CONDITION AND LIQUIDITY
Overview
Georgia Power's financial condition remained stable at December 31, 2018 . Georgia Power's cash requirements primarily consist of funding ongoing operations, common stock dividends, capital expenditures, and debt maturities. Capital expenditures and other investing activities include investments to build new generation facilities, including Plant Vogtle Units 3 and 4, to maintain existing generation facilities, to comply with environmental regulations including adding environmental modifications to existing generating units and closures of ash ponds, to expand and improve transmission and distribution facilities, and for restoration following major storms. Operating cash flows provide a substantial portion of Georgia Power's cash needs. For the three-year period from 2019 through 2021 , Georgia Power's projected common stock dividends, capital expenditures, and debt maturities are expected to exceed operating cash flows. Georgia Power plans to finance future cash needs in excess of its operating cash flows primarily through external securities issuances, equity contributions from Southern Company, borrowings from financial

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Georgia Power Company 2018 Annual Report

institutions, and borrowings through the FFB. Georgia Power plans to use commercial paper to manage seasonal variations in operating cash flows and for other working capital needs. Georgia Power intends to continue to monitor its access to short-term and long-term capital markets as well as bank credit arrangements to meet future capital and liquidity needs. See "Sources of Capital," "Financing Activities," and "Capital Requirements and Contractual Obligations" herein for additional information.
Georgia Power's investments in the qualified pension plan and nuclear decommissioning trust funds decreased in value as of December 31, 2018 as compared to December 31, 2017 . No contributions to the qualified pension plan were made for the year ended December 31, 2018 and no mandatory contributions to the qualified pension plan are anticipated during 2019 . Georgia Power also funded approximately $5 million to its nuclear decommissioning trust funds in 2018 . See "Contractual Obligations" herein and Notes 6 and 11 to the financial statements under "Nuclear Decommissioning" and "Pension Plans," respectively, for additional information.
Net cash provided from operating activities totaled $2.8 billion in 2018 , an increase of $857 million from 2017 , primarily due to the timing of vendor and property tax payments and income tax refunds, a decrease in current income taxes related to the Tax Reform Legislation, increased fuel cost recovery, and the timing of fossil fuel stock purchases, partially offset by payments of customer refunds primarily related to the Guarantee Settlement Agreement and the Georgia Power Tax Reform Settlement Agreement. Net cash provided from operating activities totaled $1.9 billion in 2017 , a decrease of $513 million from 2016 , primarily due to the timing of vendor payments and increases in under-recovered fuel costs and prepaid federal income taxes, partially offset by a decrease in voluntary contributions to the qualified pension plan. See FUTURE EARNINGS POTENTIAL – "Income Tax Matters – Federal Tax Reform Legislation " herein and Note 10 to the financial statements for additional information regarding federal income taxes.
Net cash used for investing activities totaled $3.1 billion , $0.9 billion , and $2.3 billion in 2018 , 2017 , and 2016 , respectively, due to gross property additions primarily related to installation of equipment to comply with environmental standards and construction of generation, transmission, and distribution facilities, including a total of $2.7 billion related to the construction of Plant Vogtle Units 3 and 4, partially offset in 2017 by $1.7 billion in payments received under the Guarantee Settlement Agreement. The majority of funds needed for gross property additions for the last several years has been provided from operating activities, capital contributions from Southern Company, and the issuance of debt. See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Nuclear Construction" herein for additional information on the Guarantee Settlement Agreement and construction of Plant Vogtle Units 3 and 4.
Net cash used for financing activities totaled $400 million , $151 million , and $142 million for 2018 , 2017 , and 2016 , respectively. The increase in cash used in 2018 compared to 2017 was primarily due to lower issuances of senior notes and short-term bank debt and higher redemptions and repurchases of senior notes, partially offset by higher capital contributions from Southern Company and an increase in notes payable. The increase in cash used in 2017 compared to 2016 was primarily due to a decrease in notes payable, a decrease in borrowings from the FFB for construction of Plant Vogtle Units 3 and 4, and the redemption of all outstanding shares of Georgia Power's preferred and preference stock, partially offset by higher issuances of senior notes and junior subordinated notes and a decrease in maturities of senior notes. Fluctuations in cash flow from financing activities vary from year to year based on capital needs and the maturity or redemption of securities.
Significant balance sheet changes in 2018 included an increase in property, plant, and equipment of $2.6 billion primarily related to the $3.2 billion increase in AROs, as well as the installation of equipment to comply with environmental standards and the construction of generation, transmission, and distribution facilities, and net of the $1.1 billion charge related to the construction of Plant Vogtle Units 3 and 4; an increase of $2.0 billion in other regulatory assets, deferred primarily related to AROs; and a decrease of $1.9 billion in long-term debt (including securities due within one year) primarily due to the redemption, repurchase, and maturity of senior notes and the purchase of pollution control revenue bonds. Total common stockholder's equity increased $2.4 billion primarily due to a $3.0 billion increase in paid-in capital resulting from capital contributions received from Southern Company, partially offset by a $0.6 billion decrease in retained earnings primarily due to the charge related to Plant Vogtle Units 3 and 4. See Note 6 to the financial statements for additional information on AROs and Note 2 to the financial statements under "Georgia Power – Nuclear Construction" for additional information regarding Plant Vogtle Units 3 and 4.
Georgia Power's ratio of common equity to total capitalization plus short-term debt was 58.2% at December 31, 2018 and 49.7% at December 31, 2017 . See Note 8 to the financial statements for additional information.
Sources of Capital
Georgia Power plans to obtain the funds required for construction and other purposes from sources similar to those used in the past, which were primarily from operating cash flows, external security issuances, borrowings from financial institutions, equity contributions from Southern Company, and borrowings from the FFB. However, the amount, type, and timing of any future financings, if needed, will depend upon regulatory approvals, prevailing market conditions, and other factors.

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Georgia Power Company 2018 Annual Report

In 2014, Georgia Power entered into the Loan Guarantee Agreement with the DOE, under which the proceeds of borrowings may be used to reimburse Georgia Power for Eligible Project Costs incurred in connection with its construction of Plant Vogtle Units 3 and 4. Under the Loan Guarantee Agreement, the DOE agreed to guarantee borrowings of up to $3.46 billion (not to exceed 70% of Eligible Project Costs) to be made by Georgia Power under a multi-advance credit facility (FFB Credit Facility) among Georgia Power, the DOE, and the FFB. At December 31, 2018 , Georgia Power had borrowed $2.6 billion under the FFB Credit Facility. In July 2017, Georgia Power entered into an amendment to the Loan Guarantee Agreement, which provides that further advances are conditioned upon the DOE's approval of any agreements entered into in replacement of the Vogtle 3 and 4 Agreement and satisfaction of certain other conditions.
In September 2017, the DOE issued a conditional commitment to Georgia Power for up to approximately $1.67 billion of additional guaranteed loans under the Loan Guarantee Agreement. This conditional commitment expires on March 31, 2019 , subject to any further extension approved by the DOE. Final approval and issuance of these additional loan guarantees by the DOE cannot be assured and are subject to the negotiation of definitive agreements, completion of due diligence by the DOE, receipt of any necessary regulatory approvals, and satisfaction of other conditions. See Note 8 to the financial statements under "Long-term Debt – DOE Loan Guarantee Borrowings" for additional information regarding the Loan Guarantee Agreement, including applicable covenants, events of default, mandatory prepayment events (including any decision not to continue construction of Plant Vogtle Units 3 and 4), and additional conditions to borrowing. Also see Note 2 to the financial statements under "Georgia Power – Nuclear Construction" for additional information regarding Plant Vogtle Units 3 and 4.
The issuance of long-term securities by Georgia Power is subject to the approval of the Georgia PSC. In addition, the issuance of short-term debt securities by Georgia Power is subject to regulatory approval by the FERC. Additionally, with respect to the public offering of securities, Georgia Power files registration statements with the SEC under the Securities Act of 1933, as amended. The amounts of securities authorized by the Georgia PSC and the FERC are continuously monitored and appropriate filings are made to ensure flexibility in the capital markets.
Georgia Power obtains financing separately without credit support from any affiliate. See Note 8 to the financial statements under "Bank Credit Arrangements" for additional information. The Southern Company system does not maintain a centralized cash or money pool. Therefore, funds of Georgia Power are not commingled with funds of any other company in the Southern Company system.
At December 31, 2018 , Georgia Power's current liabilities exceeded current assets by $1.4 billion primarily as a result of $0.6 billion of long-term debt that is due within one year and $0.3 billion of notes payable. Georgia Power's current liabilities frequently exceed current assets because of scheduled maturities of long-term debt and the periodic use of short-term debt as a funding source, as well as significant seasonal fluctuations in cash needs.
At December 31, 2018 , Georgia Power had approximately $4 million of cash and cash equivalents. Georgia Power's committed credit arrangement with banks was $1.75 billion at December 31, 2018 , of which $1.74 billion was unused. This credit arrangement expires in 2022.
This bank credit arrangement contains a covenant that limits debt levels and contains a cross-acceleration provision to other indebtedness (including guarantee obligations) of Georgia Power. Such cross-acceleration provision to other indebtedness would trigger an event of default if Georgia Power defaulted on indebtedness, the payment of which was then accelerated. At December 31, 2018 , Georgia Power was in compliance with this covenant. This bank credit arrangement does not contain a material adverse change clause at the time of borrowing.
Subject to applicable market conditions, Georgia Power expects to renew or replace this credit arrangement as needed prior to expiration. In connection therewith, Georgia Power may extend the maturity date and/or increase or decrease the lending commitments thereunder.
See Note 8 to the financial statements under "Bank Credit Arrangements" for additional information.
A portion of the $1.74 billion unused credit with banks is allocated to provide liquidity support to Georgia Power's pollution control revenue bonds and commercial paper program. The amount of variable rate pollution control revenue bonds outstanding requiring liquidity support at December 31, 2018 was $659 million as compared to $550 million at December 31, 2017 . In addition, at December 31, 2018 , Georgia Power had obligations related to $345 million of pollution control revenue bonds outstanding that are required to be remarketed within the next 12 months. Subsequent to December 31, 2018, Georgia Power redeemed approximately $108 million of these obligations.
Georgia Power may also meet short-term cash needs through a Southern Company subsidiary organized to issue and sell commercial paper at the request and for the benefit of Georgia Power and the other traditional electric operating companies. Proceeds from such issuances for the benefit of Georgia Power are loaned directly to Georgia Power. The obligations of each

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Georgia Power Company 2018 Annual Report

traditional electric operating company under these arrangements are several and there is no cross-affiliate credit support. Short-term borrowings are included in notes payable in the balance sheets.
Details of short-term borrowings were as follows:

Short-term Debt at the End of the Period

Short-term Debt During the Period  (*)

Amount Outstanding

Weighted Average Interest Rate

Average Amount Outstanding

Weighted Average Interest Rate

Maximum Amount Outstanding

(in millions)



(in millions)



(in millions)
December 31, 2018:









Commercial paper
$
294


3.1
%

$
127


2.5
%

$
710

Short-term bank debt


%

12


2.3
%

150

Total
$
294


3.1
%

$
139


2.5
%



December 31, 2017:












Commercial paper
$


%

$
135


1.3
%

$
760

Short-term bank debt
150


2.2
%

292


2.0
%

800

Total
$
150


2.2
%

$
427


1.8
%



December 31, 2016:












Commercial paper
$
392


1.1
%

$
87


0.8
%

$
443

(*)
Average and maximum amounts are based upon daily balances during the 12-month periods ended December 31, 2018 , 2017 , and 2016 .
Georgia Power believes the need for working capital can be adequately met by utilizing the commercial paper program, lines of credit, short-term bank notes, and operating cash flows.
Financing Activities
In addition to any financings that may be necessary to meet capital requirements and contractual obligations, Georgia Power plans to continue, when economically feasible, a program to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit.
Senior Notes
In April 2018, Georgia Power redeemed all $250 million aggregate principal amount of its Series 2008B 5.40% Senior Notes due June 1, 2018.
In May 2018, through cash tender offers, Georgia Power repurchased and retired $89 million of the $250 million aggregate principal amount outstanding of its Series 2007A 5.65% Senior Notes due March 1, 2037, $326 million of the $500 million aggregate principal amount outstanding of its Series 2009A 5.95% Senior Notes due February 1, 2039, and $335 million of the $600 million aggregate principal amount outstanding of its Series 2010B 5.40% Senior Notes due June 1, 2040, for an aggregate purchase price, excluding accrued and unpaid interest, of $902 million.
In December 2018, Georgia Power repaid at maturity $500 million aggregate principal amount of its Series 2015A 1.95% Senior Notes.
Pollution Control Revenue Bonds
During 2018, Georgia Power purchased and held the following pollution control revenue bonds, which may be reoffered to the public at a later date:
approximately $105 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), First Series 2013
$173 million aggregate principal amount of Development Authority of Bartow County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Bowen Project), First Series 2009
$55 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), Fifth Series 1994

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Georgia Power Company 2018 Annual Report

$65 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), Second Series 2008
approximately $72 million aggregate principal amount of Development Authority of Bartow County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Bowen Project), First Series 2013
In December 2018, the Development Authority of Burke County (Georgia) issued approximately $108 million aggregate principal amount of Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), First Series 2018 due November 1, 2052 for the benefit of Georgia Power. The proceeds were used to redeem, in January 2019, approximately $13 million, $20 million, and $75 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), First Series 1992, Eighth Series 1994, and Second Series 1995, respectively.
Other
In January 2018, Georgia Power repaid its outstanding $150 million and $100 million floating rate bank loans due May 31, 2018 and October 26, 2018, respectively.
Credit Rating Risk
At December 31, 2018 , Georgia Power did not have any credit arrangements that would require material changes in payment schedules or terminations as a result of a credit rating downgrade.
There are certain contracts that could require collateral, but not accelerated payment, in the event of a credit rating change to BBB- and/or Baa3 or below. These contracts are for physical electricity purchases and sales, fuel purchases, fuel transportation and storage, energy price risk management, transmission, interest rate management, and construction of new generation at Plant Vogtle Units 3 and 4.
The maximum potential collateral requirements under these contracts at December 31, 2018 were as follows:
Credit Ratings
Maximum
Potential
Collateral
Requirements
 
(in millions)
At BBB- and/or Baa3
$
92

Below BBB- and/or Baa3
$
1,106

Included in these amounts are certain agreements that could require collateral in the event that either Georgia Power or Alabama Power (an affiliate of Georgia Power) has a credit rating change to below investment grade. Generally, collateral may be provided by a Southern Company guaranty, letter of credit, or cash. Additionally, a credit rating downgrade could impact the ability of Georgia Power to access capital markets and would be likely to impact the cost at which it does so.
On February 28, 2018, Fitch downgraded the senior unsecured long-term debt rating of Georgia Power to A from A+ with a negative outlook. On August 9, 2018, Fitch downgraded the senior unsecured long-term debt rating of Georgia Power to A- from A. On September 28, 2018, Fitch assigned a negative rating outlook to the ratings of Southern Company and certain of its subsidiaries (including Georgia Power).
On August 8, 2018, Moody's downgraded the senior unsecured debt rating of Georgia Power to Baa1 from A3. On September 28, 2018, Moody's revised its rating outlook for Georgia Power from negative to stable.
As a result of the Tax Reform Legislation, certain financial metrics, such as the funds from operations to debt percentage, used by the credit rating agencies to assess Southern Company and its subsidiaries (including Georgia Power) may be negatively impacted. The Georgia Power Tax Reform Settlement Agreement approved by the Georgia PSC on April 3, 2018 is expected to help mitigate these potential adverse impacts to certain credit metrics by allowing a higher retail equity ratio until the conclusion of the Georgia Power 2019 Base Rate Case. See Note 2 to the financial statements under "Georgia Power – Rate Plans" for additional information.
Market Price Risk
Due to cost-based rate regulation and other various cost recovery mechanisms, Georgia Power continues to have limited exposure to market volatility in interest rates, commodity fuel prices, and prices of electricity. To manage the volatility attributable to these exposures, Georgia Power nets the exposures, where possible, to take advantage of natural offsets and enters into various

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Georgia Power Company 2018 Annual Report

derivative transactions for the remaining exposures pursuant to Georgia Power's policies in areas such as counterparty exposure and risk management practices. Georgia Power's policy is that derivatives are to be used primarily for hedging purposes and mandates strict adherence to all applicable risk management policies. Derivative positions are monitored using techniques including, but not limited to, market valuation, value at risk, stress testing, and sensitivity analysis.
To mitigate future exposure to changes in interest rates, Georgia Power may enter into derivatives designated as hedges. The weighted average interest rate on $0.9 billion of long-term variable interest rate exposure at December 31, 2018 was 2.57%. If Georgia Power sustained a 100 basis point change in interest rates for all long-term variable interest rate exposure, the change would affect annualized interest expense by approximately $9 million at December 31, 2018 . See Note 1 to the financial statements under "Financial Instruments" and Note 14 to the financial statements for additional information.
To mitigate residual risks relative to movements in electricity prices, Georgia Power enters into physical fixed-price contracts for the purchase and sale of electricity through the wholesale electricity market and, to a lesser extent, financial hedge contracts for natural gas purchases. Georgia Power continues to manage a fuel-hedging program implemented per the guidelines of the Georgia PSC. Georgia Power had no material change in market risk exposure for the year ended December 31, 2018 when compared to the December 31, 2017 reporting period.
The changes in fair value of energy-related derivative contracts are substantially attributable to both the volume and the price of natural gas. For the years ended December 31, the changes in fair value of energy-related derivative contracts, the majority of which are composed of regulatory hedges, were as follows:
 
2018
Changes
 
2017
Changes
 
Fair Value
 
(in millions)
Contracts outstanding at the beginning of the period, assets (liabilities), net
$
(13
)
 
$
36

Contracts realized or settled:
 
 
 
Swaps realized or settled
1

 
(13
)
Options realized or settled

 
(1
)
Current period changes (*) :
 
 
 
Swaps
(3
)
 
(28
)
Options
1

 
(7
)
Contracts outstanding at the end of the period, assets (liabilities), net
$
(14
)
 
$
(13
)
(*)
Current period changes also include the changes in fair value of new contracts entered into during the period, if any.
The net hedge volumes of energy-related derivative contracts at December 31, 2018 and 2017 were as follows:
 
2018
 
2017
 
mmBtu Volume
 
(in millions)
Commodity – Natural gas swaps
141

 
146

Commodity – Natural gas options
12

 
17

Total hedge volume
153

 
163

The weighted average swap contract cost above market prices was approximately $0.10 per mmBtu and $0.08 per mmBtu at December 31, 2018 and 2017 , respectively. The change in option fair value is primarily attributable to the volatility of the market and the underlying change in the natural gas price. All natural gas hedge gains and losses are recovered through Georgia Power's fuel cost recovery mechanism.
At December 31, 2018 and 2017 , substantially all of Georgia Power's energy-related derivative contracts were designated as regulatory hedges and were related to Georgia Power's fuel-hedging program, which had a time horizon up to 48 months. Hedging gains and losses are initially recorded as regulatory liabilities and assets, respectively, and then are included in fuel expense as they are recovered through the fuel cost recovery mechanism. Gains and losses on energy-related derivative contracts that are not designated or fail to qualify as hedges are recognized in the statements of income as incurred and were not material for any year presented.

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Georgia Power Company 2018 Annual Report

Georgia Power uses over-the-counter contracts that are not exchange traded but are fair valued using prices which are market observable, and thus fall into Level 2 of the fair value hierarchy. See Note 13 to the financial statements for further discussion of fair value measurements. The maturities of the energy-related derivative contracts, which are all Level 2 of the fair value hierarchy, at December 31, 2018 were as follows:
 
Fair Value Measurements
December 31, 2018
 
Total
 
Maturity
 
Fair Value
 
Year 1
 
Years 2&3 
 
(in millions)
Level 1
$

 
$

 
$

Level 2
(14
)
 
(6
)
 
(8
)
Level 3

 

 

Fair value of contracts outstanding at end of period
$
(14
)
 
$
(6
)
 
$
(8
)
Georgia Power is exposed to market price risk in the event of nonperformance by counterparties to the energy-related and interest rate derivative contracts. Georgia Power only enters into agreements and material transactions with counterparties that have investment grade credit ratings by Moody's and S&P or with counterparties who have posted collateral to cover potential credit exposure. Therefore, Georgia Power does not anticipate market risk exposure from nonperformance by the counterparties. For additional information, see Note 1 to the financial statements under "Financial Instruments" and Note 14 to the financial statements.
Capital Requirements and Contractual Obligations
The construction program of Georgia Power is currently estimated to total $3.7 billion for 2019 , $3.5 billion for 2020 , $3.4 billion for 2021 , $3.4 billion for 2022 , and $2.9 billion for 2023 . These amounts include expenditures of approximately $1.5 billion, $1.2 billion, $1.0 billion, and $0.5 billion for the construction of Plant Vogtle Units 3 and 4 in 2019 , 2020 , 2021 , and 2022 , respectively. These amounts also include capital expenditures related to contractual purchase commitments for nuclear fuel and capital expenditures covered under LTSAs. Estimated capital expenditures to comply with environmental laws and regulations included in these amounts are $0.2 billion , $0.1 billion , $0.1 billion , $0.2 billion , and $0.1 billion for 2019 , 2020 , 2021 , 2022 , and 2023 , respectively. These estimated expenditures do not include any potential compliance costs associated with pending regulation of CO 2 emissions from fossil fuel-fired electric generating units. See FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Laws and Regulations" and " – Global Climate Issues" herein for additional information.
Georgia Power also anticipates costs associated with closure and monitoring of ash ponds and landfills in accordance with the CCR Rule, which are reflected in Georgia Power's ARO liabilities. In December 2018, Georgia Power recorded an increase of approximately $3.1 billion to its AROs related to the CCR Rule and the related state rule. These costs, which are expected to change and could change materially as underlying assumptions are refined and the cost and the method and timing of compliance activities continue to be evaluated, are currently estimated to be $0.2 billion for 2019, $0.3 billion for 2020, $0.4 billion for 2021, $0.7 billion for 2022, and $0.6 billion for 2023. See FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Laws and Regulations – Coal Combustion Residuals" and Note 6 to the financial statements for additional information.
The construction program is subject to periodic review and revision, and actual construction costs may vary from these estimates because of numerous factors. These factors include: changes in business conditions; changes in load projections; changes in environmental laws and regulations; the outcome of any legal challenges to environmental rules; changes in generating plants, including unit retirements and replacements and adding or changing fuel sources at existing generating units, to meet regulatory requirements; changes in FERC rules and regulations; Georgia PSC approvals; changes in the expected environmental compliance program; changes in legislation; the cost and efficiency of construction labor, equipment, and materials; project scope and design changes; storm impacts; and the cost of capital. In addition, there can be no assurance that costs related to capital expenditures will be fully recovered. The construction program also includes Plant Vogtle Units 3 and 4, which includes components based on new technology that only recently began initial operation in the global nuclear industry at this scale and which may be subject to additional revised cost estimates during construction. The ability to control costs and avoid cost and schedule overruns during the development, construction, and operation of new facilities is subject to a number of factors, including, but not limited to, changes in labor costs, availability, and productivity; challenges with management of contractors, subcontractors, or vendors; adverse weather conditions; shortages, increased costs, or inconsistent quality of equipment, materials, and labor; contractor or supplier

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Georgia Power Company 2018 Annual Report

delay; non-performance under construction, operating, or other agreements; operational readiness, including specialized operator training and required site safety programs; engineering or design problems; design and other licensing-based compliance matters, including the timely resolution of ITAAC and the related approvals by the NRC; challenges with start-up activities, including major equipment failure and system integration; and/or operational performance. See Note 2 to the financial statements under "Georgia Power – Nuclear Construction" for information regarding additional factors that may impact construction expenditures.
As a result of requirements by the NRC, Georgia Power has established external trust funds for nuclear decommissioning costs. For additional information, see Note 6 to the financial statements under "Nuclear Decommissioning."
In addition, as discussed in Note 11 to the financial statements, Georgia Power provides postretirement benefits to substantially all employees and funds trusts to the extent required by the Georgia PSC and the FERC.
Funding requirements related to obligations associated with scheduled maturities of long-term debt, as well as the related interest, derivative obligations, leases, other purchase commitments, ARO settlements, and trusts are detailed in the contractual obligations table that follows. See Notes 1 , 6 , 8 , 9 , 11 , and 14 to the financial statements for additional information.

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Georgia Power Company 2018 Annual Report

Contractual Obligations
Contractual obligations at December 31, 2018 were as follows:
 
2019
 
2020- 2021
 
2022- 2023
 
After
2023
 
Total
 
(in millions)
Long-term debt (a)  —
 
 
 
 
 
 
 
 
 
Principal
$
608

 
$
1,363

 
$
641

 
$
7,343

 
$
9,955

Interest
339

 
615

 
562

 
4,660

 
6,176

Financial derivative obligations (b)
8

 
12

 

 

 
20

Operating leases (c)
23

 
27

 
11

 
13

 
74

Capital leases (c)
9

 
7

 

 

 
16

Purchase commitments —
 
 
 
 
 
 
 
 
 
Capital (d)
3,512

 
6,305

 
5,876

 
 
 
15,693

Fuel (e)
1,117

 
1,400

 
764

 
4,586

 
7,867

Purchased power (f)
270

 
536

 
549

 
2,054

 
3,409

Other (g)
42

 
179

 
109

 
267

 
597

ARO settlements (h)
202

 
674

 
1,283

 
 
 
2,159

Trusts —
 
 
 
 
 
 
 
 
 
Nuclear decommissioning (i)
5

 
11

 
11

 
88

 
115

Pension and other postretirement benefit plans (j)
43

 
79

 
 
 
 
 
122

Total
$
6,178

 
$
11,208

 
$
9,806

 
$
19,011

 
$
46,203

(a)
All amounts are reflected based on final maturity dates except for amounts related to FFB borrowings and certain pollution control revenue bonds. As it relates to the FFB borrowings, the final maturity date is February 20, 2044; however, principal amortization is reflected beginning in 2020. See Note 8 to the financial statements under "Long-term Debt – DOE Loan Guarantee Borrowings" for additional information. Georgia Power plans to continue, when economically feasible, to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit. Variable rate interest obligations are estimated based on rates at December 31, 2018 , as reflected in the statements of capitalization. Fixed rates include, where applicable, the effects of interest rate derivatives employed to manage interest rate risk. Long-term debt excludes capital lease amounts (shown separately).
(b)
See Notes 1 and 14 to the financial statements.
(c)
Excludes PPAs that are accounted for as leases and included in "Purchased power." See Note 8 to the financial statements under "Long-term Debt – Capital Leases – Georgia Power" and Note 9 to the financial statements under "Operating Leases" for additional information.
(d)
Georgia Power provides estimated capital expenditures for a five-year period, including capital expenditures associated with environmental regulations. These amounts exclude contractual purchase commitments for nuclear fuel, capital expenditures covered under LTSAs, and estimated capital expenditures for AROs, which are reflected in "Fuel," "Other," and "ARO settlements," respectively. At December 31, 2018 , significant purchase commitments were outstanding in connection with the construction program. See FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Laws and Regulations" and "Retail Regulatory Matters – Nuclear Construction" herein for additional information.
(e)
Includes commitments to purchase coal, nuclear fuel, and natural gas, as well as the related transportation and storage. In most cases, these contracts contain provisions for price escalation, minimum purchase levels, and other financial commitments. Natural gas purchase commitments are based on various indices at the time of delivery. Amounts reflected for natural gas purchase commitments have been estimated based on the NYMEX future prices at December 31, 2018 .
(f)
Estimated minimum long-term obligations for various PPA purchases from gas-fired, biomass, and wind-powered facilities and capacity payments related to Plant Vogtle Units 1 and 2. See Note 9 to the financial statements under " Fuel and Power Purchase Agreements " for additional information.
(g)
Includes LTSAs and contracts for the procurement of limestone. LTSAs include price escalation based on inflation indices.
(h)
Represents estimated costs for a five-year period associated with closing and monitoring ash ponds and landfills in accordance with the CCR Rule and the related state rule, which are reflected in Georgia Power's AROs. Material expenditures in future years for ARO settlements also will be required for ash ponds, nuclear decommissioning, and other liabilities and are reflected in Georgia Power's AROs. See FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Laws and Regulations – Coal Combustion Residuals" herein and Note 6 to the financial statements for additional information.
(i)
Projections of nuclear decommissioning trust fund contributions for Plant Hatch and Plant Vogtle Units 1 and 2 are based on the 2013 ARP . See Note 6 to the financial statements under "Nuclear Decommissioning" for additional information.
(j)
Georgia Power forecasts contributions to the pension and other postretirement benefit plans over a three-year period. Georgia Power anticipates no mandatory contributions to the qualified pension plan during the next three years. Amounts presented represent estimated benefit payments for the nonqualified pension plans, estimated non-trust benefit payments for the other postretirement benefit plans, and estimated contributions to the other postretirement benefit plan trusts, all of which will be made from Georgia Power's corporate assets. See Note 11 to the financial statements for additional information related to the pension and other postretirement benefit plans, including estimated benefit payments. Certain benefit payments will be made through the related benefit plans. Other benefit payments will be made from Georgia Power's corporate assets.

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MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
Mississippi Power Company 2018 Annual Report



OVERVIEW
Business Activities
Mississippi Power operates as a vertically integrated utility providing electric service to retail customers within its traditional service territory located within the State of Mississippi and to wholesale customers in the Southeast.
Many factors affect the opportunities, challenges, and risks of Mississippi Power's business of providing electric service. These factors include Mississippi Power's ability to maintain and grow energy sales and to operate in a constructive regulatory environment that provides timely recovery of prudently-incurred costs. These costs include those related to reliability, fuel, and stringent environmental standards, as well as ongoing capital and operations and maintenance expenditures and restoration following major storms. Appropriately balancing required costs and capital expenditures with customer prices will continue to challenge Mississippi Power for the foreseeable future. Mississippi Power is scheduled to file a base rate case in the fourth quarter 2019 (Mississippi Power 2019 Base Rate Case).
As a result of the Mississippi PSC's stated intent to issue an order establishing a new docket for a global settlement under which the Kemper County energy facility would be operated as a natural gas plant, rather than an IGCC plant (Kemper Settlement Docket), on June 28, 2017, Mississippi Power notified the Mississippi PSC that it would begin a process to suspend operations and start-up activities on the gasifier portion of the Kemper County energy facility. At the time of project suspension, the total cost estimate for the Kemper County energy facility was approximately $7.38 billion, including approximately $5.95 billion of costs subject to the construction cost cap. In the aggregate, Mississippi Power had incurred charges of $3.07 billion ($1.89 billion after tax) for changes in the cost estimate above the cost cap through May 31, 2017.
Given the Mississippi PSC's stated intent regarding no additional rate increases for the Kemper County energy facility and the subsequent suspension of construction, cost recovery of the gasification portions was no longer probable. Therefore, Mississippi Power recorded a charge to income in June 2017 of $2.8 billion ($2.0 billion after tax) for the estimated costs associated with the gasification portions of the plant and lignite mine. During the third and fourth quarters 2017, Mississippi Power recorded further charges to income totaling $242 million ($206 million after tax), including $164 million for ongoing project costs, estimated mine and gasifier-related costs, and certain termination costs during the suspension period prior to conclusion of the Kemper Settlement Docket, as well as a charge associated with the Kemper Settlement Agreement discussed below.
On February 6, 2018, the Mississippi PSC voted to approve a settlement agreement related to cost recovery for the Kemper County energy facility among Mississippi Power, the MPUS, and certain intervenors (Kemper Settlement Agreement), which resolved all cost recovery issues, modified the CPCN to limit the Kemper County energy facility to natural gas combined cycle operation, and provided for an annual revenue requirement of approximately $99.3 million for costs related to the Kemper County energy facility, which included the impact of the Tax Reform Legislation. The revenue requirement is based on (i) a fixed ROE for 2018 of 8.6% excluding any performance adjustment, (ii) a ROE for 2019 calculated in accordance with PEP, excluding the performance adjustment, (iii) for future years, a performance-based ROE calculated pursuant to PEP, and (iv) amortization periods for the related regulatory assets and liabilities of eight years and six years, respectively. The revenue requirement also reflects a disallowance related to a portion of Mississippi Power's investment in the Kemper County energy facility requested for inclusion in rate base, which was recorded in the fourth quarter 2017 as an additional charge to income of approximately $78 million ($85 million net of accumulated depreciation of $7 million) pre-tax ($48 million after tax). Under the Kemper Settlement Agreement, retail customer rates reflect a reduction of approximately $26.8 million annually, effective with the first billing cycle of April 2018, and include no recovery for costs associated with the gasifier portion of the Kemper County energy facility in 2018 or at any future date.
In 2018, Mississippi Power recorded pre-tax charges to income of $37 million ( $27 million after tax), primarily resulting from the abandonment and related closure activities and ongoing period costs, net of sales proceeds, for the mine and gasifier-related assets at the Kemper County energy facility. In addition, Mississippi Power recorded a credit to earnings of $95 million in the fourth quarter 2018 primarily resulting from the reduction of a valuation allowance for a state income tax net operating loss (NOL) carryforward associated with the Kemper County energy facility. Additional closure costs for the mine and gasifier-related assets, currently estimated at up to $10 million pre-tax (excluding salvage, net of dismantlement costs), may be incurred through the first half of 2020. In addition, period costs, including, but not limited to, costs for compliance and safety, ARO accretion, and property taxes for the mine and gasifier-related assets, are estimated to total $11 million in 2019 and $2 million to $4 million annually in 2020 through 2023. Mississippi Power is currently evaluating its options regarding the final disposition of the CO 2 pipeline, including removal of the pipeline. This evaluation is expected to be complete later in 2019. If Mississippi Power ultimately decides to remove the CO 2 pipeline, the cost of removal would have a material impact on Mississippi Power's financial statements. The ultimate outcome of these matters cannot be determined at this time.

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Mississippi Power Company 2018 Annual Report

See Note 2 to the financial statements under "Kemper County Energy Facility" and Note 10 to the financial statements for additional information.
On August 7, 2018 the Mississippi PSC approved settlement agreements between Mississippi Power and the MPUS with respect to the 2018 PEP filing and all unresolved PEP filings for prior years (PEP Settlement Agreement) and the 2018 ECO Plan filing (ECO Settlement Agreement). Rates under the PEP Settlement Agreement and the ECO Settlement Agreement resulted in annual revenue increases of approximately $21.6 million and $17 million , respectively, effective with the first billing cycle of September 2018 and are expected to continue through the conclusion of the Mississippi Power 2019 Base Rate Case.
In August 2018, the Mississippi PSC began an operations review of Mississippi Power, for which the final report is expected prior to the conclusion of the Mississippi Power 2019 Base Rate Case. Mississippi Power expects that the review will include, but not be limited to, a comparative analysis of its costs, its cost recovery framework, and ways in which it may streamline management operations for the reasonable benefit of ratepayers. The ultimate outcome of this matter cannot be determined at this time.
See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters" herein and Note 2 to the financial statements under "Mississippi Power" for additional information.
Mississippi Power continues to focus on several key performance indicators. In recognition that Mississippi Power's long-term financial success is dependent upon how well it satisfies its customers' needs, Mississippi Power's retail base rate mechanism, PEP, includes performance indicators that directly tie customer service indicators to Mississippi Power's allowed ROE. PEP measures Mississippi Power's performance on a 10-point scale as a weighted average of results in three areas: average customer price, as compared to prices of other regional utilities (weighted at 40%); service reliability, measured in percentage of time customers had electric service (40%); and customer satisfaction, measured in a survey of residential customers (20%). Mississippi Power also focuses on broader measures of customer satisfaction, plant availability, system reliability, and net income.
Mississippi Power's financial success is directly tied to customer satisfaction. Key elements of ensuring customer satisfaction include outstanding service, high reliability, and competitive prices. Management uses customer satisfaction surveys to evaluate Mississippi Power's results and generally targets top-quartile performance.
See RESULTS OF OPERATIONS herein for information on Mississippi Power's financial performance.
Earnings
Mississippi Power's net income after dividends on preferred stock was $235 million in 2018 compared to a $2.59 billion net loss in 2017 and a $50 million net loss in 2016. The changes were primarily the result of pre-tax charges associated with the Kemper IGCC of $37 million , $3.36 billion , and $428 million, in 2018 , 2017 , and 2016 , respectively. The increase in net income in 2018 was partially offset by lower tax benefits and a decrease in AFUDC. See Note 2 to the financial statements under "Kemper County Energy Facility" for additional information.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2018 Annual Report

RESULTS OF OPERATIONS
A condensed statement of operations follows:
 
Amount
 
Increase (Decrease)
from Prior Year
 
2018
 
2018
 
2017
 
(in millions)
Operating revenues
$
1,265

 
$
78

 
$
24

Fuel
405

 
10

 
52

Purchased power
41

 
16

 
(9
)
Other operations and maintenance
313

 
22

 
(26
)
Depreciation and amortization
169

 
8

 
29

Taxes other than income taxes
107

 
3

 
(5
)
Estimated loss on Kemper IGCC
37

 
(3,325
)
 
2,934

Total operating expenses
1,072

 
(3,266
)
 
2,975

Operating income
193

 
3,344

 
(2,951
)
Allowance for equity funds used during construction

 
(72
)
 
(52
)
Interest expense, net of amounts capitalized
76

 
34

 
(32
)
Other income (expense), net
17

 
16

 
3

Income taxes (benefit)
(102
)
 
430

 
(428
)
Net income
236

 
2,824

 
(2,540
)
Dividends on preferred stock
1

 
(1
)
 

Net income after dividends on preferred stock
$
235

 
$
2,825

 
$
(2,540
)
Operating Revenues
Operating revenues for 2018 were $1.3 billion , reflecting a $78 million increase from 2017 . Details of operating revenues were as follows:
 
2018
 
2017
 
(in millions)
Retail — prior year
$
854

 
$
859

Estimated change resulting from —
 
 
 
Rates and pricing
24

 
(7
)
Sales growth
4

 
4

Weather
12

 
(15
)
Fuel and other cost recovery
(5
)
 
13

Retail — current year
889

 
854

Wholesale revenues —
 
 
 
Non-affiliates
263

 
259

Affiliates
91

 
56

Total wholesale revenues
354

 
315

Other operating revenues
22

 
18

Total operating revenues
$
1,265

 
$
1,187

Percent change
6.6
%
 
2.1
%
Total retail revenues for 2018 increased $35 million , or 4.1% , compared to 2017 primarily due to the PEP and ECO Plan rate changes that became effective for the first billing cycle of September 2018, each resulting in retail revenue increases of $12 million. In addition, as a result of the PEP Settlement Agreement, Mississippi Power recognized revenues of $5 million previously

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Mississippi Power Company 2018 Annual Report

reserved in connection with the 2012 PEP lookback filing and deferred $17 million of revenue in 2017 following the complete amortization of certain regulatory assets related to the Kemper County energy facility. These increases were offset by a decrease of $16 million annually for base rates related to the Kemper County energy facility that became effective for the first billing cycle of April 2018 and the recognition in 2018 of regulatory liabilities of $5 million and $2 million, respectively, related to the equity ratio provisions of the PEP and ECO Settlement Agreements. Additionally, there was a $12 million increase as a result of colder weather in the first quarter and warmer weather in the second and third quarters in 2018 as compared to the corresponding periods in 2017 and a $5 million decrease in fuel and other cost recovery.
Total retail revenues for 2017 decreased $5 million, or 0.6%, compared to 2016 primarily due to a $15 million decrease as a result of milder weather in 2017 as compared to 2016 and the deferral of $17 million of revenue following the complete amortization of certain regulatory assets related to the Kemper County energy facility in July 2017. These decreases were partially offset by a $10 million net increase related to ECO Plan rate changes in the third quarter 2016 and the second quarter 2017 and an increase of $13 million in fuel cost recovery.
See Note 2 to the financial statements under "Mississippi Power – Environmental Compliance Overview Plan," " – Performance Evaluation Plan," and " – Kemper County Energy Facility – Rate Recovery" for additional information. See "Energy Sales" below for a discussion of changes in the volume of energy sold, including changes related to sales and weather.
Electric rates for Mississippi Power include provisions to adjust billings for fluctuations in fuel costs, including the energy component of purchased power costs. Under these provisions, fuel revenues generally equal fuel expenses, including the energy component of purchased power costs, and do not affect net income. Recoverable fuel costs include fuel and purchased power expenses reduced by the fuel and emissions portion of wholesale revenues from energy sold to customers outside Mississippi Power's service territory. See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Fuel Cost Recovery" herein for additional information.
Wholesale revenues from power sales to non-affiliated utilities, including FERC-regulated MRA sales as well as market-based sales, were as follows:
 
2018
 
2017
 
2016
 
(in millions)
Capacity and other
$
6

 
$
15

 
$
16

Energy
257

 
244

 
245

Total non-affiliated
$
263

 
$
259

 
$
261

Wholesale revenues from sales to non-affiliates will vary depending on fuel prices, the market prices of wholesale energy compared to the cost of Mississippi Power's and the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and the availability of the Southern Company system's generation. Increases and decreases in energy revenues that are driven by fuel prices are accompanied by an increase or decrease in fuel costs and do not have a significant impact on net income. In addition, Mississippi Power provides service under long-term contracts with rural electric cooperative associations and municipalities located in southeastern Mississippi under cost-based electric tariffs which are subject to regulation by the FERC. The contracts with these wholesale customers represented 17.3% of Mississippi Power's total operating revenues in 2018 and are generally subject to 10-year rolling cancellation notices. Historically, these wholesale customers have acted as a group and any changes in contractual relationships for one customer are likely to be followed by the other wholesale customers.
Short-term opportunity energy sales are also included in sales for resale to non-affiliates. These opportunity sales are made at market-based rates that generally provide a margin above Mississippi Power's variable cost to produce the energy.
Wholesale revenues from sales to affiliates will vary depending on demand and the availability and cost of generating resources at each company. These affiliate sales are made in accordance with the IIC, as approved by the FERC. These transactions do not have a significant impact on earnings since this energy is generally sold at marginal cost.
Wholesale revenues from sales to affiliates increased $35 million , or 62.5% , in 2018 compared to 2017 and increased $30 million, or 115.4%, in 2017 compared to 2016. The increases in 2018 and 2017 were primarily due to $19 million and $9 million, respectively, associated with higher natural gas prices and $16 million and $21 million, respectively, associated with increases in KWH sales due to the dispatch of Mississippi Power's lower cost generation resources to serve Southern Company system territorial load.

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Mississippi Power Company 2018 Annual Report

Energy Sales
Changes in revenues are influenced heavily by the change in the volume of energy sold from year to year. KWH sales for 2018 and the percent change from the prior year were as follows:
 
Total
KWHs
 
Total KWH
Percent Change
 
Weather-Adjusted Percent Change
 
2018
 
2018
 
2017
 
2018
 
2017
 
(in millions)
 
 
 
 
 
 
 
 
Residential
2,113

 
8.7
 %
 
(5.2
)%
 
1.4
 %
 
1.4
 %
Commercial
2,797

 
1.2

 
(2.7
)
 
(0.7
)
 
(0.1
)
Industrial
4,924

 
1.7

 
(1.3
)
 
1.7

 
(1.3
)
Other
37

 
(4.1
)
 
(1.6
)
 
(4.1
)
 
(1.6
)
Total retail
9,871

 
2.9

 
(2.5
)
 
0.9
 %
 
(0.4
)%
Wholesale
 
 
 
 
 
 
 
 
 
Non-affiliated
3,980

 
8.4

 
(6.3
)
 
 
 
 
Affiliated
2,584

 
27.7

 
82.7

 
 
 
 
Total wholesale
6,564

 
15.3

 
14.0

 
 
 
 
Total energy sales
16,435

 
7.5
 %
 
2.8
 %
 
 
 
 
Changes in retail energy sales are generally the result of changes in electricity usage by customers, changes in weather, and changes in the number of customers. Retail energy sales increased 2.9% in 2018 as compared to the prior year. This increase was primarily the result of colder weather in the first quarter and warmer weather in the second and third quarters 2018 as compared to the corresponding periods in 2017 . Weather-adjusted residential KWH sales increased in 2018 primarily due to increased customer usage. Weather-adjusted commercial KWH sales decreased primarily due to decreased customer usage slightly offset by customer growth. The increase in industrial KWH energy sales was primarily due to Hurricane Nate, which negatively impacted several large industrial customers in 2017.
Retail energy sales decreased 2.5% in 2017 as compared to the prior year. This decrease was primarily the result of milder weather in 2017 as compared to 2016 . Weather-adjusted residential KWH sales increased in 2017 primarily due to increased customer usage. Weather-adjusted commercial KWH sales decreased primarily due to decreased customer usage largely offset by customer growth. The decrease in industrial KWH energy sales was primarily due to Hurricane Nate, which negatively impacted several large industrial customers.
See "Operating Revenues" above for a discussion of significant changes in wholesale revenues to affiliated companies.
Fuel and Purchased Power Expenses
The mix of fuel sources for generation of electricity is determined primarily by demand, the unit cost of fuel consumed, and the availability of generating units. Additionally, Mississippi Power purchases a portion of its electricity needs from the wholesale market.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2018 Annual Report

Details of Mississippi Power's generation and purchased power were as follows:
 
2018
 
2017
 
2016
Total generation (in millions of KWHs)
15,966

 
15,319

 
14,514

Total purchased power (in millions of KWHs) (*)
1,210

 
724

 
1,098

Sources of generation (percent)  –
 
 
 
 
 
Gas
93

 
92

 
91

Coal
7

 
8

 
9

Cost of fuel, generated (in cents per net KWH)  –
 
 
 
 
 
Gas
2.65

 
2.69

 
2.41

Coal
3.50

 
3.64

 
3.91

Average cost of fuel, generated (in cents per net KWH)
2.72

 
2.77

 
2.55

Average cost of purchased power (in cents per net KWH) (*)
3.39

 
3.50

 
3.07

(*)
Adjusted to include the impacts of station service in 2018 and test period energy produced in 2017 and 2016 for the Kemper County energy facility, which was accounted for in accordance with FERC guidance.
Fuel and purchased power expenses were $446 million in 2018 , an increase of $26 million, or 6.2%, as compared to the prior year. The increase was primarily due to a $35 million increase in KWHs generated and purchased, partially offset by a $9 million decrease in the average cost of generation and purchased power.
Fuel and purchased power expenses were $420 million in 2017, an increase of $43 million, or 11.4%, as compared to the prior year. The increase was primarily due to a $36 million increase in the average cost of generation and purchased power and a net increase of $7 million in KWHs generated from gas generation.
Fuel and purchased power energy transactions do not have a significant impact on earnings, since energy expenses are generally offset by energy revenues through Mississippi Power's fuel cost recovery clauses. See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Fuel Cost Recovery" herein and Note 1 to the financial statements under "Fuel Costs" for additional information.
Fuel
Fuel expense increased $10 million , or 2.5% , in 2018 compared to 2017 primarily due to a 5.2% increase in KWHs generated from gas generation. Fuel expense increased $52 million, or 15.2%, in 2017 compared to 2016 primarily due to an 11.6% higher cost of natural gas.
Purchased Power
Purchased power expense increased $16 million , or 64.0% , in 2018 compared to 2017 . The increase was primarily the result of a 67% increase in the volume of KWHs purchased. Purchased power expense decreased $9 million, or 26.5%, in 2017 compared to 2016. The decrease was primarily the result of a 34% decrease in the volume of KWHs purchased, offset by a 13.9% increase in the average cost per KWH purchased compared to 2016. The changes in the volume of KWHs purchased primarily reflect the impact of test period energy offsets in 2017.
Energy purchases will vary depending on the market prices of wholesale energy as compared to the cost of the Southern Company system's generation, demand for energy within the Southern Company system's service territory, and the availability of the Southern Company system's generation. These purchases are made in accordance with the IIC or other contractual agreements, as approved by the FERC.
Other Operations and Maintenance Expenses
Other operations and maintenance expenses increased $22 million , or 7.6% , in 2018 compared to the prior year. The increase was primarily due to a $15 million increase related to an employee attrition plan, a $12 million increase in planned generation outage cost, and a $7 million increase related to overhead line maintenance and vegetation management. These increases were partially offset by the deferral of $4 million of compensation costs in accordance with the PEP Settlement Agreement. See Note 2 to the financial statements under "Mississippi Power – Performance Evaluation Plan" for additional information.
Other operations and maintenance expenses decreased $26 million, or 8.2%, in 2017 compared to the prior year. The decrease was primarily due to a $10 million decrease in transmission and distribution expenses related to overhead line maintenance, an $8 million decrease in contractor services related to facilities, corporate advertising, and employee compensation and benefits, and an

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$8 million decrease related to the combined cycle and the associated common facilities portion of the Kemper County energy facility.
Depreciation and Amortization
Depreciation and amortization increased $8 million , or 5.0% , in 2018 compared to 2017 primarily due to $8 million of amortization related to the ECO Plan and $6 million of depreciation for additional plant in service. These increases were partially offset by a decrease of $4 million in amortization of regulatory assets associated with Mercury and Air Toxics Standards (MATS) rule compliance.
Depreciation and amortization increased $29 million, or 22.0%, in 2017 compared to 2016 primarily due to $13 million of amortization related to the ECO Plan, $7 million of depreciation for additional plant in service, and $6 million in additional amortization of regulatory assets associated with MATS rule compliance.
See Note 5 to the financial statements under "Depreciation and Amortization" and Note 2 to the financial statements under "FERC Matters" and "Mississippi Power – Environmental Compliance Overview Plan" for additional information.
Estimated Loss on Kemper IGCC
In 2018 , 2017 , and 2016, charges of $37 million , $3.36 billion , and $428 million, respectively, associated with the Kemper IGCC were recorded. The 2018 pre-tax charge of $37 million primarily resulted from the abandonment and related closure activities and ongoing period costs, net of sales proceeds, for the mine and gasifier-related assets at the Kemper County energy facility. In June 2017, Mississippi Power suspended the gasifier portion of the project and recorded a charge to earnings for the remaining $2.8 billion book value of the gasifier portion of the project. Prior to the suspension, Mississippi Power recorded losses for revisions of estimated costs expected to be incurred on construction of the Kemper IGCC in excess of the $2.88 billion cost cap established by the Mississippi PSC, net of $245 million of grants awarded to the project by the DOE under the Clean Coal Power Initiative Round 2 and excluding the cost of the lignite mine and equipment, the cost of the CO 2 pipeline facilities, AFUDC, and certain general exceptions (Cost Cap Exceptions).
See Note 2 to the financial statements under "Kemper County Energy Facility" for additional information.
Allowance for Equity Funds Used During Construction
AFUDC equity decreased $72 million , or 100.0% , in 2018 as compared to 2017 and $52 million, or 41.9%, in 2017 as compared to 2016 as a result of suspending construction of the Kemper IGCC in June 2017. See Note 2 to the financial statements under "Kemper County Energy Facility" for additional information.
Interest Expense, Net of Amounts Capitalized
Interest expense, net of amounts capitalized increased $34 million , or 81.0% , in 2018 compared to 2017 . The increase was primarily associated with a $33 million net reduction in interest recorded in 2017 following a settlement with the IRS related to research and experimental (R&E) deductions. The increase also reflects a $29 million reduction in interest capitalized as a result of suspending construction of the Kemper IGCC in June 2017, offset by decreases of $12 million in interest expense as a result of lower average outstanding debt, $8 million related to uncertain tax positions, and $7 million due to the completion of Kemper IGCC carrying cost amortization in 2017.
Interest expense, net of amounts capitalized decreased $32 million, or 43.2%, in 2017 compared to 2016. The decrease was primarily associated with a $33 million net reduction in interest following a settlement with the IRS related to R&E deductions. Also contributing to the decrease was the amortization of $6 million in interest deferrals in accordance with an order the Mississippi PSC issued in December 2015 (In-Service Asset Rate Order) and a $7 million decrease in interest related to outstanding debt as a result of lower balances and lower rates. These decreases were partially offset by a $20 million reduction in interest capitalized as a result of suspending construction of the Kemper IGCC.
See Note 10 to the financial statements under "Section 174 Research and Experimental Deduction" for additional information.
Other Income (Expense), Net
Other income (expense), net increased $16 million in 2018 compared to 2017. The increase primarily reflects the $24 million settlement of Mississippi Power's Deepwater Horizon claim in May 2018, partially offset by a $7 million increase in charitable donations. See Note 3 to the financial statements under "General Litigation Matters – Mississippi Power" for additional information. Other income (expense), net increased $3 million in 2017 compared to 2016.

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Income Taxes (Benefit)
Income tax benefits decreased $430 million , or 80.8% , in 2018 compared to 2017 primarily due to a $1.07 billion increase in income tax expense from higher pre-tax earnings primarily due to lower charges related to the Kemper County energy facility, net of the non-deductible AFUDC equity portion. This increase in income tax expense was partially offset by a $434 million decrease in income tax expense due to the impacts of the Tax Reform Legislation, including $407 million primarily associated with the revaluation of 2017 deferred tax assets related to the Kemper IGCC recorded in 2017 and $23 million associated with the lower federal income tax rate applicable in 2018, as well as $194 million related to the reduction in 2018 of a valuation allowance for a state income tax NOL carryforward recorded in 2017.
Income tax benefits increased $428 million, or 411.5%, in 2017 compared to 2016 primarily due to $809 million in tax benefits on the estimated probable losses on the Kemper IGCC, net of the non-deductible AFUDC equity portion and the related state valuation allowances, partially offset by $372 million resulting from Tax Reform Legislation. Tax Reform Legislation earnings impacts are primarily due to revaluing deferred tax assets related to the Kemper County energy facility.
See FUTURE EARNINGS POTENTIAL – "Income Tax Matters" herein and Note 10 to the financial statements for additional information.
Effects of Inflation
Mississippi Power is subject to rate regulation that is generally based on the recovery of historical and projected costs. The effects of inflation can create an economic loss since the recovery of costs could be in dollars that have less purchasing power. Any adverse effect of inflation on Mississippi Power's results of operations has not been substantial in recent years.
FUTURE EARNINGS POTENTIAL
General
Mississippi Power operates as a vertically integrated utility providing electric service to retail customers within its traditional service territory located in southeast Mississippi and to wholesale customers in the Southeast. Prices for electricity provided by Mississippi Power to retail customers are set by the Mississippi PSC under cost-based regulatory principles. Retail rates and earnings are reviewed and may be adjusted periodically within certain limitations. Prices for wholesale electricity sales, interconnecting transmission lines, and the exchange of electric power are regulated by the FERC. See "FERC Matters" herein, ACCOUNTING POLICIES – "Application of Critical Accounting Policies and Estimates – Utility Regulation" herein, and Note 2 to the financial statements for additional information about regulatory matters.
The results of operations for the past three years are not necessarily indicative of future earnings potential. The level of Mississippi Power's future earnings depends on numerous factors that affect the opportunities, challenges, and risks of Mississippi Power's business of providing electric service. These factors include Mississippi Power's ability to recover its prudently-incurred costs in a timely manner during a time of increasing costs and its ability to prevail against legal challenges associated with the Kemper County energy facility. Future earnings will be driven primarily by continued customer growth and the weak pace of growth in electricity use per customer, especially in residential and commercial markets. Earnings will also depend upon maintaining and growing sales, considering, among other things, the adoption and/or penetration rates of increasingly energy-efficient technologies and increasing volumes of electronic commerce transactions, both of which could contribute to a net reduction in customer usage. Earnings are subject to a variety of other factors. These factors include weather, competition, developing new and maintaining existing energy contracts and associated load requirements with other utilities and other wholesale customers, energy conservation practiced by customers, the use of alternative energy sources by customers, the price of electricity, the price elasticity of demand, and the rate of economic growth or decline in Mississippi Power's service territory. Demand for electricity is primarily driven by the pace of economic growth that may be affected by changes in regional and global economic conditions, which may impact future earnings.
Mississippi Power's retail base rates are set under the PEP, a rate plan approved by the Mississippi PSC. Typically, two filings are made for each calendar year: the PEP projected filing, which is typically filed prior to the beginning of the year based on a projected revenue requirement, and the PEP lookback filing, which is filed after the end of the year and allows for review of the actual return compared to the allowed return range. Pursuant to the PEP Settlement Agreement, PEP proceedings are suspended until after the conclusion of the Mississippi Power 2019 Base Rate Case and Mississippi Power is not required to make any PEP filings for regulatory years 2018, 2019, and 2020. See "Retail Regulatory Matters" herein and Note 2 to the financial statements under "Mississippi Power – Performance Evaluation Plan" for more information.
On October 2, 2018, the Mississippi PSC approved the executed agreements between Mississippi Power and its largest retail customer, Chevron, for Mississippi Power to continue providing retail service to the Chevron refinery in Pascagoula, Mississippi

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through 2038. The new agreements are not expected to have a material impact on Mississippi Power's earnings; however, the co-generation assets located at the refinery are accounted for as a sales-type lease in accordance with the new lease accounting rules that became effective in 2019. These assets are also subject to a security interest granted to Chevron. See FINANCIAL CONDITION AND LIQUIDITY – "Credit Rating Risk" herein for additional information.
Mississippi Power provides service under long-term contracts with rural electric cooperative associations and municipalities located in southeastern Mississippi under cost-based electric tariffs which are subject to regulation by the FERC. The contracts with these wholesale customers represented 17.3% of Mississippi Power's total operating revenues in 2018 and are generally subject to 10-year rolling cancellation notices. Historically, these wholesale customers have acted as a group and any changes in contractual relationships for one customer are likely to be followed by the other wholesale customers.
Environmental Matters
Mississippi Power's operations are regulated by state and federal environmental agencies through a variety of laws and regulations governing air, water, land, and protection of other natural resources. Mississippi Power maintains comprehensive environmental compliance and GHG strategies to assess upcoming requirements and compliance costs associated with these environmental laws and regulations. The costs, including capital expenditures, operations and maintenance costs, and costs reflected in ARO liabilities, required to comply with environmental laws and regulations and to achieve stated goals may impact future electric generating unit retirement and replacement decisions, results of operations, cash flows, and/or financial condition. Related costs may result from the installation of additional environmental controls, closure and monitoring of CCR facilities, unit retirements, or changing fuel sources for certain existing units, as well as related upgrades to Mississippi Power's transmission and distribution systems. A major portion of these costs is expected to be recovered through retail and wholesale rates. The ultimate impact of environmental laws and regulations and the GHG goals discussed herein will depend on various factors, such as state adoption and implementation of requirements, the availability and cost of any deployed technology, fuel prices, and the outcome of pending and/or future legal challenges.
New or revised environmental laws and regulations could affect many areas of Mississippi Power's operations. The impact of any such changes cannot be determined at this time. Environmental compliance costs could affect earnings if such costs cannot continue to be recovered in rates on a timely basis or through long-term wholesale agreements . Further, increased costs that are recovered through regulated rates could contribute to reduced demand for electricity , which could negatively affect results of operations, cash flows, and/or financial condition. Additionally, many commercial and industrial customers may also be affected by existing and future environmental requirements, which for some may have the potential to ultimately affect their demand for electricity . See Note 2 to the financial statements under "Mississippi Power – Environmental Compliance Overview Plan" for additional information.
Through 2018 , Mississippi Power has invested approximately $654 million in environmental capital retrofit projects to comply with environmental requirements, with annual totals of approximately $11 million, $9 million, and $17 million for 2018 , 2017 , and 2016 , respectively. Although the timing, requirements, and estimated costs could change as environmental laws and regulations are adopted or modified, as compliance plans are revised or updated, and as legal challenges to rules are initiated or completed, Mississippi Power's current compliance strategy estimates capital expenditures of $73 million from 2019 through 2023 , with annual totals of approximately $18 million, $20 million, $17 million, $5 million, and $13 million for 2019 , 2020 , 2021 , 2022 , and 2023 , respectively. These estimates do not include any potential compliance costs associated with pending regulation of CO 2 emissions from fossil fuel-fired electric generating units. See "Global Climate Issues" herein for additional information. Mississippi Power also anticipates expenditures associated with ash pond closure and ground water monitoring under the CCR Rule, which are reflected in Mississippi Power's ARO liabilities. See FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements and Contractual Obligations" herein and Note 6 to the financial statements for additional information.
Environmental Laws and Regulations
Air Quality
The EPA has set National Ambient Air Quality Standards (NAAQS) for six air pollutants (carbon monoxide, lead, nitrogen dioxide, ozone, particulate matter, and SO 2 ) to protect and improve the nation's air quality, which it reviews and revises periodically. Following a NAAQS revision, states are required to develop an EPA-approved plan to protect air quality. These state plans can require additional emission controls, improvements in control efficiency, or fuel changes which can result in increased compliance and operational costs. NAAQS requirements can also adversely affect the siting of new electric generating facilities. All areas within Mississippi Power's service territory have been designated as attainment for all NAAQS . If areas are designated as nonattainment in the future, increased compliance costs could result.

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In 2011, the EPA finalized the Cross-State Air Pollution Rule (CSAPR) to address impacts of SO 2 and NO X emissions from fossil fuel-fired electric generating plants. CSAPR establishes emissions trading programs and budgets for certain states and allocates emissions allowances for sources in those states. In 2016, the EPA published a final rule establishing more stringent ozone season NO X emissions budgets in Alabama and Mississippi . The outcome of ongoing CSAPR litigation concerning the 2016 CSAPR rule, to which Mississippi Power is a party, could have an impact on the State of Mississippi's ozone season NO X emissions budget. Increases in either future fossil fuel-fired generation or the availability or cost of CSAPR allowances could have a negative financial impact on results of operations for Mississippi Power .
The EPA finalized regional haze regulations in 2005 and 2017. These regulations require states, tribal governments, and various federal agencies to develop and implement plans to reduce pollutants that impair visibility and demonstrate reasonable progress toward the goal of restoring natural visibility conditions in certain areas, including national parks and wilderness areas. States must submit a revised state implementation plan (SIP) to the EPA demonstrating continued reasonable progress towards achieving visibility improvement goals. These plans could require reductions in certain pollutants, such as particulate matter, SO 2 , and NO X , which could result in increased compliance costs. The EPA issued a limited approval of the regional progress SIP for the State of Mississippi because Mississippi must revise the best available retrofit technology (BART) provisions of its SIP. Therefore, Plant Daniel continues to be evaluated under the regional haze BART provisions. Mississippi Power is required to submit Plant Daniel's BART analysis to the State of Mississippi by summer 2019. Requirements for further reduction of these pollutants at Plant Daniel could increase compliance costs.
Water Quality
In 2014, the EPA finalized requirements under Section 316(b) of the Clean Water Act (CWA) to regulate cooling water intake structures (CWIS) to minimize their effects on fish and other aquatic life at existing power plants (e.g. coal, natural gas, oil, and nuclear generating plants) and manufacturing facilities. The regulation requires plant-specific studies to determine applicable CWIS changes to protect organisms that either get caught on the intake screens (impingement) or are drawn into the cooling system (entrainment). Mississippi Power is conducting these studies and currently anticipates applicable CWIS changes may include fish-friendly CWIS screens with fish return systems and minor additions of monitoring equipment at certain plants. However, the ultimate impact of this rule will depend on the outcome of these plant-specific studies, any additional protective measures required to be incorporated into each plant's National Pollutant Discharge Elimination System (NPDES) permit based on site-specific factors, and the outcome of any legal challenges.
In 2015, the EPA finalized the steam electric effluent limitations guidelines (ELG) rule (2015 ELG Rule) that set national standards for wastewater discharges from new and existing steam electric generating units generating greater than 50 MWs. The 2015 ELG Rule prohibits effluent discharges of certain waste streams and imposes stringent limits on flue gas desulfurization (scrubber) wastewater discharges. The revised technology-based limits and the CCR Rule require extensive changes to existing ash and wastewater management systems or the installation and operation of new ash and wastewater management systems. Compliance with the 2015 ELG Rule is expected to require capital expenditures and increased operational costs primarily for Mississippi Power's coal-fired electric generation. State environmental agencies will incorporate specific compliance applicability dates in the NPDES permitting process for each ELG waste stream no later than December 31, 2023. The EPA is scheduled to issue a new rulemaking by December 2019 that could revise the limitations and applicability dates of two of the waste streams regulated in the 2015 ELG Rule. The impact of any changes to the 2015 ELG Rule will depend on the content of the new rule and the outcome of any legal challenges.
In 2015, the EPA and the U.S. Army Corps of Engineers (Corps) jointly published a final rule that revised the regulatory definition of waters of the United States (WOTUS) for all CWA programs. The rule significantly expanded the scope of federal jurisdiction over waterbodies (such as rivers, streams, canals, and wastewater treatment ponds), which could impact new generation projects and permitting and reporting requirements associated with the installation, expansion, and maintenance of transmission and distribution projects. The EPA and the Corps are expected to publish a final rule in 2019 to replace the 2015 WOTUS definition. The impact of any changes to the 2015 WOTUS rule will depend on the content of this final rule and the outcome of any legal challenges.
Coal Combustion Residuals
In 2015, the EPA finalized non-hazardous solid waste regulations for the disposal of CCR, including coal ash and gypsum, in landfills and surface impoundments (ash ponds) at active generating power plants. The EPA's CCR Rule requires landfills and ash ponds to be evaluated against a set of performance criteria and potentially closed if minimum criteria are not met. Closure of existing landfills and ash ponds could require installation of equipment and infrastructure to manage CCR in accordance with the CCR Rule. Based on cost estimates for closure and monitoring of landfills and ash ponds pursuant to the CCR Rule, Mississippi

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Power recorded AROs for each CCR unit in 2015. As further analysis was performed and closure details were developed, Mississippi Power has continued to periodically update these cost estimates, as discussed further below.
The EPA published certain amendments to the CCR Rule, which became effective August 29, 2018. These amendments extend the date from April 2019 to October 31, 2020 to cease sending CCR and other waste streams to ash ponds that demonstrate compliance with all except two of the specified performance criteria.
On August 21, 2018, the U.S. Court of Appeals for the District of Columbia Circuit issued a decision suggesting the EPA should regulate previously-excluded inactive ash ponds located at retired generation facilities and questioning both the ability of unlined ash ponds to continue operating no matter the performance criteria results and the classification of clay-lined landfills and ash ponds. These developments could impact the expected timing of Mississippi Power's landfill and ash pond closure activities, but the extent of any impact will depend on the outcome of ongoing litigation, anticipated EPA rulemaking action to establish further guidance, and the outcome of any legal challenges.
During 2018, Mississippi Power recorded increases of approximately $16 million to its AROs related to the CCR Rule. The increases include approximately $11 million based on information from feasibility studies performed on an ash pond at Plant Greene County, which is co-owned with Alabama Power, and approximately $5 million related to increases in post-closure care for Plant Watson's ash pond and landfill. The Alabama Power studies for Plant Greene County indicated that additional closure costs, primarily related to increases in estimated ash volume, water management requirements, and design revisions, will be required to close the ash pond under the planned closure-in-place methodology. As the level of work becomes more defined in the next 12 months, it is likely that these cost estimates will change and the change could be material. Mississippi Power expects to periodically update its ARO cost estimates.
In 2016, the Mississippi PSC granted a CPCN to Mississippi Power authorizing certain projects associated with complying with the CCR Rule. Additionally in this order, the Mississippi PSC also authorized Mississippi Power to recover any costs associated with the CPCN, including future monitoring costs, through the ECO clause. Absent continued recovery of ARO costs through regulated rates, Mississippi Power's results of operations, cash flows, and financial condition could be materially impacted. See FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements and Contractual Obligations" herein and Note 6 to the financial statements for additional information regarding Mississippi Power's AROs.
The ultimate outcome of these matters cannot be determined at this time.
Environmental Remediation
Mississippi Power must comply with environmental laws and regulations governing the handling and disposal of waste and releases of hazardous substances. Under these various laws and regulations, Mississippi Power may also incur substantial costs to clean up affected sites. Mississippi Power has authority from the Mississippi PSC to recover approved environmental compliance costs through established regulatory mechanisms. Mississippi Power recognizes a liability for environmental remediation costs only when it determines a loss is probable and reasonably estimable.
Global Climate Issues
On August 31, 2018, the EPA published a proposed rule known as the Affordable Clean Energy (ACE) Rule, which is intended to replace a regulation enacted in 2015 known as the Clean Power Plan (CPP), that would limit CO 2 emissions from existing fossil fuel-fired electric generating units. The CPP has been stayed by the U.S. Supreme Court since 2016. The ACE Rule would require states to develop GHG unit-specific emission rate standards based on heat-rate efficiency improvements for existing fossil fuel-fired steam units. As proposed, combustion turbines, including natural gas combined cycles, are not affected sources. As of January 1, 2019, Mississippi Power has ownership interests in six fossil fuel-fired steam units to which the proposed ACE Rule is applicable. The ultimate impact of this rule to Mississippi Power is currently unknown and will depend on changes between the proposal and the final rule, subsequent state plan developments and requirements, and any associated legal challenges.
On December 20, 2018, the EPA published a proposed review of the Standards of Performance for Greenhouse Gas Emissions from New, Modified, and Reconstructed Stationary Sources: Electric Utility Generating Units final rule (2015 NSPS rule). The EPA's final 2015 NSPS rule set standards of performance for new, modified, and reconstructed electric utility generating units which included stationary combustion turbines and fossil-fired steam boilers. This proposal reduces the stringency of the 2015 NSPS rule by not basing the new and reconstructed fossil-fired steam boiler and IGCC standards on partial carbon capture and sequestration. The impact of any changes to this rule will depend on the content of the final rule and the outcome of any legal challenges.
The EPA's GHG reporting rule requires annual reporting of GHG emissions expressed in terms of metric tons of CO 2 equivalent emissions for a company's operational control of facilities. Based on ownership or financial control of facilities, Mississippi

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Power's 2017 GHG emissions were approximately 8 million metric tons of CO 2 equivalent. The preliminary estimate of Mississippi Power's 2018 GHG emissions on the same basis is approximately 8 million metric tons of CO 2 equivalent.
Through 2017, the Southern Company system has achieved an estimated GHG emission reduction of 36% since 2007. In April 2018, Southern Company established an intermediate goal of a 50% reduction in carbon emissions from 2007 levels by 2030 and a long-term goal of low- to no-carbon operations by 2050. To achieve these goals, the Southern Company system expects to continue growing its renewable energy portfolio, optimize technology advancements to modernize its transmission and distribution systems, increase the use of natural gas for generation, complete ongoing construction projects, invest in energy efficiency, and continue research and development efforts focused on technologies to lower GHG emissions. The Southern Company system's ability to achieve these goals also will be dependent on many external factors, including supportive national energy policies, low natural gas prices, and the development, deployment, and advancement of relevant energy technologies.
FERC Matters
Municipal and Rural Associations Tariff
Mississippi Power provides wholesale electric service to Cooperative Energy, East Mississippi Electric Power Association, and the City of Collins, all located in southeastern Mississippi, under a long-term cost-based, FERC-regulated MRA tariff.
In 2016, Mississippi Power reached a settlement agreement with its wholesale customers, which was subsequently approved by the FERC, for an increase in wholesale base revenues under the MRA cost-based electric tariff, primarily as a result of placing scrubbers for Plant Daniel Units 1 and 2 in service in 2015. The settlement agreement became effective for services rendered beginning May 1, 2016, resulting in an estimated annual revenue increase of $7 million under the MRA cost-based electric tariff. Additionally, under the settlement agreement, the tariff customers agreed to similar regulatory treatment for MRA tariff ratemaking as the treatment approved for retail ratemaking under the In-Service Asset Rate Order. This regulatory treatment primarily included (i) recovery of the operational Kemper County energy facility assets providing service to customers and other related costs, (ii) amortization of the Kemper County energy facility-related regulatory assets included in rates under the settlement agreement over the 36 months ending April 30, 2019, (iii) Kemper County energy facility-related expenses included in rates under the settlement agreement no longer being deferred and charged to expense, and (iv) removing all of the Kemper County energy facility CWIP from rate base with a corresponding increase in accrual of AFUDC, which totaled approximately $22 million through the suspension of Kemper IGCC start-up activities.
Mississippi Power expects to reach a subsequent settlement agreement with its wholesale customers and will make a filing with the FERC during the first quarter 2019. The settlement agreement is intended to be consistent with the Kemper Settlement Agreement, including the impact of the Tax Reform Legislation. The ultimate outcome of this matter cannot be determined at this time.
In September 2017, Mississippi Power and Cooperative Energy executed a Shared Service Agreement (SSA), as part of the MRA tariff, under which Mississippi Power and Cooperative Energy will share in providing electricity to all Cooperative Energy delivery points, in lieu of the current arrangement under which each delivery point is specifically assigned to either entity. The SSA accepted by the FERC in October 2017 became effective on January 1, 2018 and may be cancelled by Cooperative Energy with 10 years notice after December 31, 2020. The SSA provides Cooperative Energy the option to decrease its use of Mississippi Power's generation services under the MRA tariff, subject to annual and cumulative caps and a one-year notice requirement. In the event Cooperative Energy elects to reduce these services, the related reduction in Mississippi Power's revenues is not expected to be significant through 2020.
Fuel Cost Recovery
Mississippi Power has a wholesale MRA and a Market Based (MB) fuel cost recovery factor. Effective with the first billing cycle for January 2018, fuel rates increased $11 million annually for wholesale MRA customers and $1 million annually for wholesale MB customers. Effective January 1, 2019, the wholesale MRA fuel rate decreased $16 million annually and the wholesale MB fuel rate decreased by an immaterial amount. At December 31, 2018, over recovered wholesale MRA fuel costs included in other regulatory liabilities, current on the balance sheet were approximately $6 million compared to an immaterial amount at December 31, 2017. Under recovered wholesale MB fuel costs included in the balance sheets were immaterial at December 31, 2018 and 2017.
Mississippi Power's operating revenues are adjusted for differences in actual recoverable fuel cost and amounts billed in accordance with the currently approved cost recovery rate. Accordingly, changes in the billing factor should have no significant effect on Mississippi Power's revenues or net income, but will affect cash flow.

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Open Access Transmission Tariff
On May 10, 2018, AMEA and Cooperative Energy filed with the FERC a complaint against SCS and the traditional electric operating companies (including Mississippi Power) claiming that the current 11.25% base ROE used in calculating the annual transmission revenue requirements of the traditional electric operating companies' (including Mississippi Power's) open access transmission tariff is unjust and unreasonable as measured by the applicable FERC standards. The complaint requested that the base ROE be set no higher than 8.65% and that the FERC order refunds for the difference in revenue requirements that results from applying a just and reasonable ROE established in this proceeding upon determining the current ROE is unjust and unreasonable. On June 18, 2018, SCS and the traditional electric operating companies (including Mississippi Power) filed their response challenging the adequacy of the showing presented by the complainants and offering support for the current ROE. On September 6, 2018, the FERC issued an order establishing a refund effective date of May 10, 2018 in the event a refund is due and initiating an investigation and settlement procedures regarding the current base ROE. Through December 31, 2018, the estimated maximum potential refund is not expected to be material to Mississippi Power's results of operations or cash flows. The ultimate outcome of this matter cannot be determined at this time.
Cooperative Energy Power Supply Agreement
In 2008, Mississippi Power entered into a 10 -year power supply agreement (PSA) with Cooperative Energy for approximately 152 MWs, which became effective in 2011. Following certain plant retirements, the PSA capacity was reduced to 86 MWs. On February 5, 2018, Mississippi Power and Cooperative Energy executed an amendment to extend the PSA through March 31, 2021, effective April 1, 2018, which increased total capacity by 286 MWs.
Cooperative Energy also has a 10 -year network integration transmission service agreement (NITSA) with SCS for transmission service to certain delivery points on Mississippi Power's transmission system that became effective in 2011. As a result of the PSA amendment, Cooperative Energy and SCS amended the terms of the NITSA, which the FERC approved, to provide for the purchase of incremental transmission capacity for service beginning April 1, 2018 through March 31, 2021.
Retail Regulatory Matters
Mississippi Power's rates and charges for service to retail customers are subject to the regulatory oversight of the Mississippi PSC. Mississippi Power's rates are a combination of base rates and several separate cost recovery clauses for specific categories of costs. These separate cost recovery clauses address such items as fuel and purchased power, energy efficiency programs, ad valorem taxes, property damage, and the costs of compliance with environmental laws and regulations. Costs not addressed through one of the specific cost recovery clauses are expected to be recovered through Mississippi Power's base rates. See Note 2 to the financial statements under "Mississippi Power" for additional information.
Operations Review
In August 2018, the Mississippi PSC began an operations review of Mississippi Power, for which the final report is expected prior to the conclusion of the Mississippi Power 2019 Base Rate Case. Mississippi Power expects that the review will include, but not be limited to, a comparative analysis of its costs, its cost recovery framework, and ways in which it may streamline management operations for the reasonable benefit of ratepayers. The ultimate outcome of this matter cannot be determined at this time.
Performance Evaluation Plan
Mississippi Power's retail base rates generally are set under the PEP, a rate plan approved by the Mississippi PSC. Two filings are made for each calendar year: the PEP projected filing, which is typically filed prior to the beginning of the year based on a projected revenue requirement, and the PEP lookback filing, which is filed after the end of the year and allows for review of the actual revenue requirement compared to the projected filing.
In 2011, Mississippi Power submitted its annual PEP lookback filing for 2010, which recommended no surcharge or refund. Later in 2011, the MPUS disputed certain items in the 2010 PEP lookback filing. In 2012, the Mississippi PSC issued an order canceling Mississippi Power's PEP lookback filing for 2011. I n 2013, the MPUS contested Mississippi Power's PEP lookback filing for 2012, which indicated a refund due to customers of $5 million . In 2014 through 2018, Mississippi Power submitted its annual PEP lookback filings for the prior years, which for each of 2013, 2014, and 2017 indicated no surcharge or refund and for each of 2015 and 2016 indicated a $5 million surcharge. Additionally, in July 2016, in November 2016, and in November 2017, Mississippi Power submitted its annual projected PEP filings for 2016, 2017, and 2018, respectively, which for 2016 and 2017 indicated no change in rates and for 2018 indicated a rate increase of 4% , or $38 million in annual revenues. The Mississippi PSC suspended each of these filings to allow more time for review.

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Mississippi Power Company 2018 Annual Report

On February 7, 2018, Mississippi Power revised its annual projected PEP filing for 2018 to reflect the impacts of the Tax Reform Legislation. The revised filing requested an increase of $26 million in annual revenues, based on a performance adjusted ROE of 9.33% and an increased equity ratio of 55% . On July 27, 2018, Mississippi Power and the MPUS entered into the PEP Settlement Agreement, which was approved by the Mississippi PSC on August 7, 2018. Rates under the PEP Settlement Agreement became effective with the first billing cycle of September 2018. The PEP Settlement Agreement provides for an increase of approximately $21.6 million in annual base retail revenues, which excludes certain compensation costs contested by the MPUS, as well as approximately $2 million which was subsequently approved for recovery through the 2018 Energy Efficiency Cost Rider as discussed below. Under the PEP Settlement Agreement, Mississippi Power is deferring the contested compensation costs for 2018 and 2019 as a regulatory asset, which totaled $4 million as of December 31, 2018 and is included in other regulatory assets, deferred on the balance sheet. The Mississippi PSC is currently expected to rule on the appropriate treatment for such costs in connection with the Mississippi Power 2019 Base Rate Case. The ultimate outcome of this matter cannot be determined at this time.
Pursuant to the PEP Settlement Agreement, Mississippi Power's performance-adjusted allowed ROE is 9.31% and its allowed equity ratio is capped at 51% , pending further review by the Mississippi PSC. In lieu of the requested equity ratio increase, Mississippi Power retained $44 million of excess accumulated deferred income taxes resulting from the Tax Reform Legislation until the conclusion of the Mississippi Power 2019 Base Rate Case. Further, Mississippi Power agreed to seek equity contributions sufficient to restore its equity ratio to 50% by December 31, 2018. Since Mississippi Power's actual average equity ratio for 2018 was more than 1% lower than the 50% target, Mississippi Power deferred the corresponding difference in its revenue requirement of approximately $4 million as a regulatory liability for resolution in the Mississippi Power 2019 Base Rate Case. Pursuant to the PEP Settlement Agreement, PEP proceedings are suspended until after the conclusion of the Mississippi Power 2019 Base Rate Case and Mississippi Power is not required to make any PEP filings for regulatory years 2018, 2019, and 2020. The PEP Settlement Agreement also resolved all open PEP filings with no change to customer rates. As a result, in the third quarter 2018, Mississippi Power recognized revenues of $5 million previously reserved in connection with the 2012 PEP lookback filing.
Energy Efficiency
In 2013, the Mississippi PSC approved an energy efficiency and conservation rule requiring electric and gas utilities in Mississippi serving more than 25,000 customers to implement energy efficiency programs and standards. Quick Start Plans, which include a portfolio of energy efficiency programs that are intended to provide benefits to a majority of customers, were extended by an order issued by the Mississippi PSC in July 2016, until the time the Mississippi PSC approves a comprehensive portfolio plan program. The ultimate outcome of this matter cannot be determined at this time.
On May 8, 2018, the Mississippi PSC issued an order approving Mississippi Power's revised annual projected Energy Efficiency Cost Rider 2018 compliance filing, which increased annual retail revenues by approximately $3 million effective with the first billing cycle for June 2018.
On February 5, 2019, the Mississippi PSC issued an order approving Mississippi Power's Energy Efficiency Cost Rider 2019 compliance filing, which included a slight decrease in annual retail revenues, effective with the first billing cycle in March 2019.
Environmental Compliance Overview Plan
In accordance with a 2011 accounting order from the Mississippi PSC, Mississippi Power has the authority to defer in a regulatory asset for future recovery all plant retirement- or partial retirement-related costs resulting from environmental regulations. The Mississippi PSC approved $41 million and $17 million of costs that were reclassified to regulatory assets associated with the fuel conversion of Plant Watson and Plant Greene County, respectively, for amortization over five -year periods that began in July 2016 and July 2017, respectively. As a result, these decisions are not expected to have a material impact on Mississippi Power's financial statements.
In August 2016, the Mississippi PSC approved Mississippi Power's revised ECO Plan filing for 2016, which requested the maximum 2% annual increase in revenues, or approximately $18 million , primarily related to the Plant Daniel Units 1 and 2 scrubbers placed in service in 2015. The revised rates became effective with the first billing cycle for September 2016. Approximately $22 million of related revenue requirements in excess of the 2% maximum was deferred for inclusion in the 2017 filing, along with related carrying costs.
In May 2017, the Mississippi PSC approved Mississippi Power's ECO Plan filing for 2017, which requested the maximum 2% annual increase in revenues, or approximately $ 18 million , primarily related to the carryforward from the prior year. The rates became effective with the first billing cycle for June 2017. Approximately $26 million , plus carrying costs, of related revenue requirements in excess of the 2% maximum was deferred for inclusion in the 2018 filing.

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On February 14, 2018, Mississippi Power submitted its ECO Plan filing for 2018, including the effects of the Tax Reform Legislation, which requested the maximum 2% annual increase in revenues, or approximately $17 million , primarily related to the carryforward from the prior year.
On August 3, 2018, Mississippi Power and the MPUS entered into the ECO Settlement Agreement, which provides for an increase of approximately $17 million in annual base retail revenues and was approved by the Mississippi PSC on August 7, 2018. Rates under the ECO Settlement Agreement became effective with the first billing cycle of September 2018 and will continue in effect until modified by the Mississippi PSC. These revenues are expected to be sufficient to recover the costs included in Mississippi Power's request for 2018, as well as the remaining deferred amounts, totaling $26 million at December 31, 2018, along with the related carrying costs . In accordance with the ECO Settlement Agreement, ECO Plan proceedings are suspended until after the conclusion of the Mississippi Power 2019 Base Rate Case and Mississippi Power is not required to make any ECO Plan filings for 2018, 2019, and 2020, with any necessary adjustments to be reflected in the Mississippi Power 2019 Base Rate Case. The ECO Settlement Agreement contains the same terms as the PEP Settlement Agreement described herein with respect to allowed ROE and equity ratio. At December 31, 2018, Mississippi Power has recorded $2 million in other regulatory liabilities, deferred on the balance sheet related to the actual December 31, 2018 average equity ratio differential from target applicable to the ECO Plan.
Fuel Cost Recovery
Mississippi Power establishes, annually, a retail fuel cost recovery factor that is approved by the Mississippi PSC. Mississippi Power is required to file for an adjustment to the retail fuel cost recovery factor annually. In January 2017, the Mississippi PSC approved the 2017 retail fuel cost recovery factor, effective February 2017 through January 2018, which resulted in an annual revenue increase of $55 million . On January 16, 2018, the Mississippi PSC approved the 2018 retail fuel cost recovery factor, effective February 2018 through January 2019, which resulted in an annual revenue increase of $39 million . At December 31, 2018, the amount of over recovered retail fuel costs included in the balance sheet in other accounts payable was approximately $8 million compared to $6 million under recovered at December 31, 2017. On January 10, 2019, the Mississippi PSC approved the 2019 retail fuel cost recovery factor, effective February 2019, which results in a $35 million decrease in annual revenues as a result of lower expected fuel costs.
Mississippi Power's operating revenues are adjusted for differences in actual recoverable fuel cost and amounts billed in accordance with the currently approved cost recovery rate. Accordingly, changes in the billing factor should have no significant effect on Mississippi Power's revenues or net income but will affect operating cash flows.
Ad Valorem Tax Adjustment
Mississippi Power establishes annually an ad valorem tax adjustment factor that is approved by the Mississippi PSC to collect the ad valorem taxes paid by Mississippi Power. On May 8, 2018, the Mississippi PSC approved Mississippi Power's annual ad valorem tax adjustment factor filing for 2018, which included a rate increase of 0.8% , or $7 million , effective with the first billing cycle for June 2018.
Kemper County Energy Facility
Overview
The Kemper County energy facility was designed to utilize IGCC technology with an expected output capacity of 582 MWs and to be fueled by locally mined lignite (an abundant, lower heating value coal) from a mine owned by Mississippi Power and situated adjacent to the Kemper County energy facility. The mine, operated by North American Coal Corporation, started commercial operation in 2013. In connection with the Kemper County energy facility construction, Mississippi Power constructed approximately 61 miles of CO 2 pipeline infrastructure for the transport of captured CO 2 for use in enhanced oil recovery.
Schedule and Cost Estimate
In 2012, the Mississippi PSC issued an order (2012 MPSC CPCN Order), confirming the CPCN originally approved by the Mississippi PSC in 2010 authorizing the acquisition, construction, and operation of the Kemper County energy facility. The certificated cost estimate of the Kemper County energy facility included in the 2012 MPSC CPCN Order was $2.4 billion , net of approximately $0.57 billion in Cost Cap Exceptions. The 2012 MPSC CPCN Order approved a construction cost cap of up to $2.88 billion , with recovery of prudently-incurred costs subject to approval by the Mississippi PSC. The Kemper County energy facility was originally projected to be placed in service in May 2014. Mississippi Power placed the combined cycle and the associated common facilities portion of the Kemper County energy facility in service in August 2014. The combined cycle and associated common facilities portions of the Kemper County energy facility were dedicated as Plant Ratcliffe on April 27, 2018.

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On June 21, 2017, the Mississippi PSC stated its intent to issue an order, which occurred on July 6, 2017, directing Mississippi Power to pursue a settlement under which the Kemper County energy facility would be operated as a natural gas plant, rather than an IGCC plant, and address all issues associated with the Kemper County energy facility. The order established the Kemper Settlement Docket. On June 28, 2017, Mississippi Power notified the Mississippi PSC that it would begin a process to suspend operations and start-up activities on the gasifier portion of the Kemper County energy facility, given the uncertainty as to its future.
At the time of project suspension in June 2017, the total cost estimate for the Kemper County energy facility was approximately $7.38 billion , including approximately $5.95 billion of costs subject to the construction cost cap, and was net of the $137 million in additional grants from the DOE received in April 2016 (Additional DOE Grants). In the aggregate, Mississippi Power had recorded charges to income of $3.07 billion ( $1.89 billion after tax) as a result of changes in the cost estimate above the cost cap for the Kemper IGCC through May 31, 2017.
Given the Mississippi PSC's stated intent regarding no further rate increase for the Kemper County energy facility and the subsequent suspension, cost recovery of the gasifier portions became no longer probable; therefore, Mississippi Power recorded an additional charge to income in June 2017 of $2.8 billion ( $2.0 billion after tax), which included estimated costs associated with the gasification portions of the plant and lignite mine. During the third and fourth quarters of 2017, Mississippi Power recorded charges to income of $242 million ( $206 million after tax), including $164 million for ongoing project costs, estimated mine and gasifier-related costs, and certain termination costs during the suspension period prior to conclusion of the Kemper Settlement Docket, as well as the charge associated with the Kemper Settlement Agreement discussed below.
In 2018, Mississippi Power recorded pre-tax charges to income of $37 million ( $27 million after tax), primarily resulting from the abandonment and related closure activities and ongoing period costs, net of sales proceeds, for the mine and gasifier-related assets at the Kemper County energy facility. In addition, Mississippi Power recorded a credit to earnings of $95 million in the fourth quarter 2018 primarily resulting from the reduction of a valuation allowance for a state income tax NOL carryforward associated with the Kemper County energy facility. Additional closure costs for the mine and gasifier-related assets, currently estimated at up to $10 million pre-tax (excluding salvage, net of dismantlement costs), may be incurred through the first half of 2020. In addition, period costs, including, but not limited to, costs for compliance and safety, ARO accretion, and property taxes for the mine and gasifier-related assets, are estimated to total $11 million in 2019 and $2 million to $4 million annually in 2020 through 2023. Mississippi Power is currently evaluating its options regarding the final disposition of the CO 2 pipeline, including removal of the pipeline. This evaluation is expected to be complete later in 2019. If Mississippi Power ultimately decides to remove the CO 2 pipeline, the cost of removal would have a material impact on Mississippi Power's financial statements. The ultimate outcome of these matters cannot be determined at this time.
See Note 10 to the financial statements for additional information.
Rate Recovery
Kemper Settlement Agreement
In 2015, the Mississippi PSC issued the In-Service Asset Rate Order regarding the Kemper County energy facility assets that were commercially operational and providing service to customers (the transmission facilities, combined cycle, natural gas pipeline, and water pipeline) and other related costs. The In-Service Asset Rate Order provided for retail rate recovery of an annual revenue requirement of approximately $126 million which went into effect on December 17, 2015.
On February 6, 2018, the Mississippi PSC voted to approve the Kemper Settlement Agreement, which resolved all cost recovery issues, modified the CPCN to limit the Kemper County energy facility to natural gas combined cycle operation, and provided for an annual revenue requirement of approximately $99.3 million for costs related to the Kemper County energy facility, which included the impact of the Tax Reform Legislation. The revenue requirement is based on (i) a fixed ROE for 2018 of 8.6% excluding any performance adjustment, (ii) a ROE for 2019 calculated in accordance with PEP, excluding the performance adjustment, (iii) for future years, a performance-based ROE calculated pursuant to PEP, and (iv) amortization periods for the related regulatory assets and liabilities of eight years and six years, respectively. The revenue requirement also reflects a disallowance related to a portion of Mississippi Power's investment in the Kemper County energy facility requested for inclusion in rate base, which was recorded in the fourth quarter 2017 as an additional charge to income of approximately $78 million ($85 million net of accumulated depreciation of $7 million) pre-tax ($48 million after tax).
Under the Kemper Settlement Agreement, retail customer rates reflect a reduction of approximately $26.8 million annually, effective with the first billing cycle of April 2018, and include no recovery for costs associated with the gasifier portion of the Kemper County energy facility in 2018 or at any future date.

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Mississippi Power Company 2018 Annual Report

Reserve Margin Plan
On August 6, 2018, Mississippi Power filed its proposed Reserve Margin Plan (RMP), as required by the Mississippi PSC's order in the Kemper Settlement Docket. Under the RMP, Mississippi Power proposed alternatives that would reduce its reserve margin, with the most economic of the alternatives being the two-year and seven-year acceleration of the retirement of Plant Watson Units 4 and 5, respectively, to the first quarter 2022 and the four -year acceleration of the retirement of Plant Greene County Units 1 and 2 to the third quarter 2021 and the third quarter 2022, respectively, in order to lower or avoid operating costs. The Plant Greene County unit retirements would require the completion by Alabama Power of proposed transmission and system reliability improvements, as well as agreement by Alabama Power. The RMP filing also states that, in the event the Mississippi PSC ultimately approves an alternative that includes an accelerated retirement, Mississippi Power would require authorization to defer in a regulatory asset for future recovery the remaining net book value of the units at the time of retirement. A decision by the Mississippi PSC that does not include recovery of the remaining book value of any generating units retired could have a material impact on Mississippi Power's financial statements. The ultimate outcome of this matter cannot be determined at this time.
Lignite Mine and CO 2 Pipeline Facilities
Mississippi Power owns the lignite mine and equipment and mineral reserves located around the Kemper County energy facility site. The mine started commercial operation in June 2013.
In 2010, Mississippi Power executed a 40 -year management fee contract with Liberty Fuels Company, LLC (Liberty Fuels), a wholly-owned subsidiary of The North American Coal Corporation, which developed, constructed, and is responsible for the mining operations through the end of the mine reclamation. As the mining permit holder, Liberty Fuels has a legal obligation to perform mine reclamation and Mississippi Power has a contractual obligation to fund all reclamation activities. As a result of the abandonment of the Kemper IGCC, final mine reclamation began in 2018 and is expected to be substantially completed in 2020, with monitoring expected to continue through 2027. See Note 6 to the financial statements and Note 7 to the financial statements under "Mississippi Power" for additional information.
In addition, Mississippi Power constructed the CO 2 pipeline for the planned transport of captured CO 2 for use in enhanced oil recovery and entered into an agreement with Denbury Onshore (Denbury) to purchase the captured CO 2 . The agreement with Denbury was terminated in December 2018 and did not have a material impact on Mississippi Power's results of operations. Mississippi Power is currently evaluating its options regarding the final disposition of the CO 2 pipeline, including removal of the pipeline. This evaluation is expected to be complete later in 2019. If Mississippi Power ultimately decides to remove the CO 2 pipeline, the cost of removal would have a material impact on Mississippi Power's financial statements. The ultimate outcome of this matter cannot be determined at this time.
For additional information on the Kemper County energy facility, see Note 2 to the financial statements under " Mississippi Power Kemper County Energy Facility ."
Government Grants
In 2010, the DOE, through a cooperative agreement with SCS, agreed to fund $270 million of the Kemper County energy facility through the grants awarded to the project by the DOE under the Clean Coal Power Initiative Round 2. Through December 31, 2018, Mississippi Power received total DOE grants of $387 million , of which $382 million reduced the construction costs of the Kemper County energy facility and $5 million reimbursed Mississippi Power for expenses associated with DOE reporting. On December 12, 2018, Mississippi Power filed with the DOE its request for property closeout certification under the contract related to the grants received. Mississippi Power and the DOE are currently in discussions regarding the requested closeout and property disposition, which may require payment to the DOE for a portion of certain property that is to be retained by Mississippi Power. The ultimate outcome of this matter cannot be determined at this time; however, it could have a material impact on Mississippi Power's financial statements.
Income Tax Matters
Federal Tax Reform Legislation
In December 2017, the Tax Reform Legislation was signed into law and became effective on January 1, 2018. The Tax Reform Legislation, among other things, reduced the federal corporate income tax rate to 21%, retained normalization provisions for public utility property and existing renewable energy incentives, and repealed the corporate alternative minimum tax. In addition, under the Tax Reform Legislation, NOLs generated after December 31, 2017 can no longer be carried back to previous tax years but can be carried forward indefinitely, with utilization limited to 80% of taxable income of the subsequent tax year. The projected reduction of Southern Company's consolidated income tax liability resulting from the tax rate reduction also delays the expected

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utilization of existing tax credit carryforwards. See Note 10 to the financial statements for information on Southern Company's joint consolidated income tax allocation agreement.
Following the enactment of the Tax Reform Legislation, the SEC staff issued Staff Accounting Bulletin 118 – "Income Tax Accounting Implications of the Tax Cuts and Jobs Act" (SAB 118), which provided for a measurement period of up to one year from the enactment date to complete accounting under GAAP for the tax effects of the legislation. Due to the complex and comprehensive nature of the enacted tax law changes and their application under GAAP, Mississippi Power considered all amounts recorded in the financial statements as a result of the Tax Reform Legislation "provisional" as discussed in SAB 118 and subject to revision prior to filing its 2017 tax return in the fourth quarter 2018. Mississippi Power recognized tax expense of $372 million in 2017. Following the filing of its 2017 tax return, Mississippi Power recorded tax benefits of $35 million to adjust the provisional amount for a total net tax expense of $337 million as a result of the Tax Reform Legislation. In addition, in total, Mississippi Power recorded an $11 million increase in regulatory assets and a $395 million increase in regulatory liabilities as a result of the Tax Reform Legislation and $1 million of stranded excess deferred tax balances in AOCI at December 31, 2017 were adjusted through retained earnings in 2018. As of December 31, 2018, Mississippi Power considered the measurement of impacts from the Tax Reform Legislation on deferred income tax assets and liabilities, primarily due to the impact of the reduction of the corporate income tax rate, to be complete.
However, the IRS continues to issue regulations that provide further interpretation and guidance on the law and each state's adoption of the provisions contained in the Tax Reform Legislation remains uncertain. In addition, the regulatory treatment of certain impacts of the Tax Reform Legislation is subject to the discretion of the FERC and the Mississippi PSC. The ultimate impact of this matter cannot be determined at this time. See Note 2 to the financial statements for additional information regarding the PEP Settlement Agreement and the ECO Settlement Agreement, which reflect certain impacts of the Tax Reform Legislation. Also see FINANCIAL CONDITION AND LIQUIDITY – "Credit Rating Risk" herein and Note 10 to the financial statements under "Current and Deferred Income Taxes" for additional information.
Bonus Depreciation
Under the Tax Reform Legislation, projects with binding contracts prior to September 28, 2017 and placed in service after September 27, 2017 remain eligible for bonus depreciation under the PATH Act. The PATH Act allowed for 50% bonus depreciation for 2015 through 2017, 40% bonus depreciation for 2018, and 30% bonus depreciation for 2019 and certain long-lived assets placed in service in 2020. Based on provisional estimates, bonus depreciation is expected to result in positive cash flows of approximately $10 million for the 2018 tax year and Mississippi Power does not expect material positive cash flows from bonus depreciation for the 2019 tax year. See Note 10 to the financial statements under "Current and Deferred Income Taxes" for additional information. The ultimate outcome of this matter cannot be determined at this time.
Other Matters
Mississippi Power is involved in various other matters being litigated and regulatory matters that could affect future earnings. In addition, Mississippi Power is subject to certain claims and legal actions arising in the ordinary course of business. Mississippi Power's business activities are subject to extensive governmental regulation related to public health and the environment, such as laws and regulations governing air, water, land, and protection of other natural resources. Litigation over environmental issues and claims of various types, including property damage, personal injury, common law nuisance, and citizen enforcement of environmental laws and regulations, has occurred throughout the U.S. This litigation has included claims for damages alleged to have been caused by CO 2 and other emissions, CCR, and alleged exposure to hazardous materials, and/or requests for injunctive relief in connection with such matters.
The ultimate outcome of such pending or potential litigation or regulatory matters cannot be predicted at this time; however, for current proceedings not specifically reported herein or in Notes 2 and 3 to the financial statements, management does not anticipate that the ultimate liabilities, if any, arising from such current proceedings would have a material effect on Mississippi Power's financial statements. See Notes 2 and 3 to the financial statements for a discussion of various other contingencies, regulatory matters, and other matters being litigated which may affect future earnings potential.
To mitigate customer rate impacts associated with rising costs and declining sales, Mississippi Power management approved an employee attrition plan on July 13, 2018. In 2018, Mississippi Power recorded $16 million in expenses related to this plan.
On October 2, 2018, the Mississippi PSC approved the executed agreements between Mississippi Power and its largest retail customer, Chevron, for Mississippi Power to continue providing retail service to the Chevron refinery in Pascagoula, Mississippi through 2038. The new agreements are not expected to have a material impact on earnings.
In conjunction with Southern Company's sale of Gulf Power, Mississippi Power and Gulf Power have committed to seek a restructuring of their 50% undivided ownership interests in Plant Daniel such that each of them would, after the restructuring,

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own 100% of a generating unit. On January 15, 2019, Gulf Power provided notice to Mississippi Power that Gulf Power will retire its share of the generating capacity of Plant Daniel on January 15, 2024. Mississippi Power has the option to purchase Gulf Power's ownership interest for $1 on January 15, 2024, provided that Mississippi Power exercises the option no later than 120 days prior to that date. Mississippi Power is assessing the potential operational and economic effects of Gulf Power's notice. The ultimate outcome of these matters remains subject to completion of Mississippi Power's evaluations and applicable regulatory approvals, including the FERC and the Mississippi PSC, and cannot now be determined. See Note 15 to the financial statements under " Southern Company's Sale of Gulf Power " for information regarding the sale of Gulf Power.
Litigation
On May 18, 2018, Southern Company and Mississippi Power received a notice of dispute and arbitration demand filed by Martin Product Sales, LLC (Martin) based on two agreements, both related to Kemper IGCC byproducts for which Mississippi Power provided termination notices in September 2017. Martin alleges breach of contract, breach of good faith and fair dealing, fraud and misrepresentation, and civil conspiracy and makes a claim for damages in the amount of approximately $143 million , as well as additional unspecified damages, attorney's fees, costs, and interest. In the first quarter 2019, Mississippi Power and Southern Company filed motions to dismiss.
On November 21, 2018, Ray C. Turnage and 10 other individual plaintiffs filed a putative class action complaint against Mississippi Power and the three current members of the Mississippi PSC in the U.S. District Court for the Southern District of Mississippi. Mississippi Power received Mississippi PSC approval in 2013 to charge a mirror CWIP rate premised upon including in its rate base pre-construction and construction costs for the Kemper IGCC prior to placing the Kemper IGCC into service. The Mississippi Supreme Court reversed that approval and ordered Mississippi Power to refund the amounts paid by customers under the previously-approved mirror CWIP rate. The plaintiffs allege that the initial approval process, and the amount approved, were improper. They also allege that Mississippi Power underpaid customers in the refund process because it applied the wrong interest rate to the payments. The plaintiffs seek to recover, on behalf of themselves and their putative class, actual damages, punitive damages, pre-judgment interest, post-judgment interest, attorney's fees, and costs.
Mississippi Power believes these legal challenges have no merit; however, an adverse outcome in either of these proceedings could have a material impact on Mississippi Power's results of operations, financial condition, and liquidity. Mississippi Power will vigorously defend itself in these matters, the ultimate outcome of which cannot be determined at this time.
See Note 2 to the financial statements under "Kemper County Energy Facility" for additional information.
ACCOUNTING POLICIES
Application of Critical Accounting Policies and Estimates
Mississippi Power prepares its financial statements in accordance with GAAP. Significant accounting policies are described in Notes 1 , 5 , and 6 to the financial statements. In the application of these policies, certain estimates are made that may have a material impact on Mississippi Power's results of operations and related disclosures. Different assumptions and measurements could produce estimates that are significantly different from those recorded in the financial statements. Senior management has reviewed and discussed the following critical accounting policies and estimates with the Audit Committee of Southern Company's Board of Directors.
Utility Regulation
Mississippi Power is subject to retail regulation by the Mississippi PSC and wholesale regulation by the FERC. These regulatory agencies set the rates Mississippi Power is permitted to charge customers based on allowable costs. As a result, Mississippi Power applies accounting standards which require the financial statements to reflect the effects of rate regulation. Through the ratemaking process, the regulators may require the inclusion of costs or revenues in periods different than when they would be recognized by a non-regulated company. This treatment may result in the deferral of expenses and the recording of related regulatory assets based on anticipated future recovery through rates or the deferral of gains or creation of liabilities and the recording of related regulatory liabilities. The application of the accounting standards has a further effect on Mississippi Power's financial statements as a result of the estimates of allowable costs used in the ratemaking process. These estimates may differ from those actually incurred by Mississippi Power; therefore, the accounting estimates inherent in specific costs such as depreciation and pension and other postretirement benefits have less of a direct impact on Mississippi Power's results of operations and financial condition than they would on a non-regulated company.
As reflected in Note 2 to the financial statements under " Mississippi Power Regulatory Assets and Liabilities ," significant regulatory assets and liabilities have been recorded. Management reviews the ultimate recoverability of these regulatory assets and any requirement to refund these regulatory liabilities based on applicable regulatory guidelines and GAAP. However, adverse

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legislative, judicial, or regulatory actions could materially impact the amounts of such regulatory assets and liabilities and could adversely impact Mississippi Power's financial statements.
Kemper County Energy Facility Closure Costs
For periods prior to the second quarter 2017, significant accounting estimates included Kemper County energy facility estimated construction costs, project completion date, and rate recovery. In the aggregate, Mississippi Power had recorded charges to income of $3.07 billion ($1.89 billion after tax) as a result of changes in the cost estimate above the cost cap for the Kemper IGCC through May 31, 2017, of which $305 million ($188 million after tax) occurred in 2017 and $428 million ($264 million after tax) occurred in 2016.
On June 21, 2017, the Mississippi PSC stated its intent to issue an order (which occurred on July 6, 2017) directing Mississippi Power to pursue a settlement under which the Kemper County energy facility would be operated as a natural gas plant rather than an IGCC plant; therefore, Mississippi Power suspended the operation and start-up of the gasifier portion of the Kemper County energy facility on June 28, 2017.
As a result of these events, cost recovery of the gasification portions became no longer probable; therefore, Mississippi Power recorded an additional charge to income in June 2017 of $2.8 billion ($2.0 billion after tax), which included estimated costs associated with the gasification portions of the plant and lignite mine. During the third and fourth quarters of 2017, Mississippi Power recorded charges to income of $242 million ($206 million after tax), including $164 million for ongoing project costs, estimated mine and gasifier-related costs, and certain termination costs during the suspension period prior to conclusion of the Kemper Settlement Docket, as well as a charge of $78 million associated with the Kemper Settlement Agreement. The estimated construction costs and project completion date were no longer considered significant accounting estimates for 2017 following the suspension and related charges to earnings. In addition, the Kemper Settlement Agreement was approved by the Mississippi PSC on February 6, 2018 and resolved all related cost recovery issues.
In 2018, Mississippi Power recorded pre-tax charges to income of $37 million ( $27 million after tax), primarily resulting from the abandonment and related closure activities and ongoing period costs, net of sales proceeds, for the mine and gasifier-related assets at the Kemper County energy facility. Additional closure costs for the mine and gasifier-related assets, currently estimated at up to $10 million pre-tax (excluding salvage, net of dismantlement costs), may be incurred through the first half of 2020. During the fourth quarter 2018, Mississippi Power began evaluating its options regarding the final disposition of the CO 2 pipeline, including removal of the pipeline. This evaluation is expected to be complete later in 2019. If Mississippi Power ultimately decides to remove the CO 2 pipeline, the cost of removal would have a material impact on Mississippi Power's financial statements. In addition, in December 2018, Mississippi Power filed with the DOE its request for property closeout certification under the contract related to the grants received. Mississippi Power and the DOE are currently in discussions regarding the requested closeout and property disposition, which may require payment to the DOE for a portion of certain property that is to be retained by Mississippi Power and could have a material impact on Mississippi Power's financial statements. Given the significant judgment and uncertainty involved in estimating these remaining costs associated with the abandonment and closure activities for the mine and gasifier-related assets at the Kemper County energy facility, Mississippi Power considers the related liabilities to be critical accounting estimates.
See Note 2 to the financial statements under "Kemper County Energy Facility" for additional information. The ultimate outcome of these matters cannot be determined at this time.
Asset Retirement Obligations
AROs are computed as the fair value of the estimated costs for an asset's future retirement and are recorded in the period in which the liability is incurred. The estimated costs are capitalized as part of the related long-lived asset and depreciated over the asset's useful life. In the absence of quoted market prices, AROs are estimated using present value techniques in which estimates of future cash outlays associated with the asset retirements are discounted using a credit-adjusted risk-free rate. Estimates of the timing and amounts of future cash outlays are based on projections of when and how the assets will be retired and the cost of future removal activities.
The liability for AROs primarily relates to facilities that are subject to the CCR Rule, principally ash ponds. In addition, Mississippi Power has AROs related to various landfill sites, underground storage tanks, water wells, mine reclamation, and asbestos removal.
Mississippi Power also has identified retirement obligations related to certain transmission and distribution facilities and certain wireless communication towers. However, liabilities for the removal of these assets have not been recorded because the settlement timing for the retirement obligations related to these assets is indeterminable and, therefore, the fair value of the retirement obligations cannot be reasonably estimated. A liability for these retirement obligations will be recognized when sufficient

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information becomes available to support a reasonable estimation of the retirement obligation. In 2018, Mississippi Power incurred $16 million in ARO revisions, including $11 million at Plant Greene County, which is co-owned with Alabama Power.
The cost estimates for AROs related to the disposal of CCR are based on information using various assumptions related to closure and post-closure costs, timing of future cash outlays, inflation and discount rates, and the potential methods for complying with the CCR Rule requirements for closure. Mississippi Power expects to periodically update its ARO cost estimates. See FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Laws and Regulations – Coal Combustion Residuals" herein and Note 6 to the financial statements for additional information.
Given the significant judgment involved in estimating AROs, Mississippi Power considers the liabilities for AROs to be critical accounting estimates.
Pension and Other Postretirement Benefits
Mississippi Power's calculation of pension and other postretirement benefits expense is dependent on a number of assumptions. These assumptions include discount rates, healthcare cost trend rates, expected long-term return on plan assets, mortality rates, expected salary and wage increases, and other factors. Components of pension and other postretirement benefits expense include interest and service cost on the pension and other postretirement benefit plans, expected return on plan assets, and amortization of certain unrecognized costs and obligations. Actual results that differ from the assumptions utilized are accumulated and amortized over future periods and, therefore, generally affect recognized expense and the recorded obligation in future periods. While Mississippi Power believes that the assumptions used are appropriate, differences in actual experience or significant changes in assumptions would affect its pension and other postretirement benefit costs and obligations.
Key elements in determining Mississippi Power's pension and other postretirement benefit expense are the expected long-term return on plan assets and the discount rate used to measure the benefit plan obligations and the periodic benefit plan expense for future periods. The expected long-term return on pension and other postretirement benefit plan assets is based on Southern Company's investment strategy, historical experience, and expectations for long-term rates of return that consider external actuarial advice. Southern Company determines the long-term return on plan assets by applying the long-term rate of expected returns on various asset classes to Southern Company's target asset allocation. For purposes of determining Mississippi Power's liability related to the pension and other postretirement benefit plans, Southern Company discounts the future related cash flows using a single-point discount rate developed from the weighted average of market-observed yields for high quality fixed income securities with maturities that correspond to expected benefit payments.
A 25 basis point change in any significant assumption (discount rate, salary increases, or long-term rate of return on plan assets) would result in a $1 million or less change in total annual benefit expense, a $19 million or less change in the projected obligation for the pension plan, and a $2 million or less change in the projected obligation for other post retirement benefit plans.
See Note 11 to the financial statements for additional information regarding pension and other postretirement benefits.
Contingent Obligations
Mississippi Power is subject to a number of federal and state laws and regulations as well as other factors and conditions that subject it to environmental, litigation, and other risks. See FUTURE EARNINGS POTENTIAL herein and Notes 2 and 3 to the financial statements for more information regarding certain of these contingencies. Mississippi Power periodically evaluates its exposure to such risks and records reserves for those matters where a non-tax-related loss is considered probable and reasonably estimable. The adequacy of reserves can be significantly affected by external events or conditions that can be unpredictable; thus, the ultimate outcome of such matters could materially affect Mississippi Power's results of operations, cash flows, or financial condition.
Recently Issued Accounting Standards
See Note 1 to the financial statements under " Recently Adopted Accounting Standards " for additional information.
In 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 requires lessees to recognize on the balance sheet a lease liability and a right-of-use asset for all leases. ASU 2016-02 also changes the recognition, measurement, and presentation of expense associated with leases and provides clarification regarding the identification of certain components of contracts that would represent a lease. The accounting required by lessors is relatively unchanged . ASU 2016-02 is effective for fiscal years beginning after December 15, 2018 and Mississippi Power adopted the new standard effective January 1, 2019.
Mississippi Power elected the transition methodology provided by ASU No. 2018-11, Leases (Topic 842): Targeted Improvements , whereby the requirements of ASU 2016-02 are applied on a prospective basis as of the adoption date of January 1, 2019, without restating prior periods. Mississippi Power elected the package of practical expedients provided by ASU 2016-02

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2018 Annual Report

that allows prior determinations of whether existing contracts are, or contain, leases and the classification of existing leases to continue without reassessment. Additionally, Mississippi Power applied the use-of-hindsight practical expedient in determining lease terms as of the date of adoption and elected the practical expedient that allows existing land easements not previously accounted for as leases not to be reassessed. Mississippi Power also made accounting policy elections to account for short-term leases in all asset classes as off-balance sheet leases and combined lease and non-lease components in the computations of lease obligations and right-of-use assets for most asset classes.
Mississippi Power completed the implementation of a new application to track and account for its leases and updated its internal controls and accounting policies to support the accounting for leases under ASU 2016-02. Mississippi Power completed its lease inventory and determined its most significant leases involve equipment and railcar leases. In the first quarter 2019, adoption of ASU 2016-02 did not have a material impact on Mississippi Power's balance sheet or statement of income.
FINANCIAL CONDITION AND LIQUIDITY
Overview
Earnings for all periods presented were negatively affected by charges associated with the Kemper IGCC. See FUTURE EARNINGS POTENTIAL – "Kemper County Energy Facility" herein and Note 2 to the financial statements for additional information.
Mississippi Power's financial condition remained stable at December 31, 2018. Mississippi Power's cash requirements primarily consist of funding ongoing operations, common stock dividends, capital expenditures, and debt maturities. Capital expenditures and other investing activities include investments to maintain existing generation facilities, to comply with environmental regulations including adding environmental modifications to certain existing generating units and closures of ash ponds, to expand and improve transmission and distribution facilities, and for restoration following major storms. Operating cash flows provide a substantial portion of Mississippi Power's cash needs. For the three-year period from 2019 through 2021, Mississippi Power's projected common stock dividends, capital expenditures, and debt maturities are expected to exceed operating cash flows. Mississippi Power plans to finance future cash needs in excess of its operating cash flows primarily through external securities issuances, borrowings from financial institutions, including commercial paper to the extent Mississippi Power is eligible to participate, and equity contributions from Southern Company. Mississippi Power intends to continue to monitor its access to short-term and long-term capital markets as well as its bank credit arrangements to meet future capital and liquidity needs. See "Sources of Capital," "Financing Activities," and "Capital Requirements and Contractual Obligations" herein for additional information.
Mississippi Power's investments in the qualified pension plan decreased in value as of December 31, 2018 as compared to December 31, 2017. No contributions to the qualified pension plan were made for the year ended December 31, 2018 and no mandatory contributions to the qualified pension plan are anticipated during 2019. See Note 11 to the financial statements under "Pension Plans" for additional information.
Net cash provided from operating activities totaled $804 million for 2018, an increase of $301 million as compared to 2017. The increase in cash provided from operating activities in 2018 was primarily related to increased income tax refunds in 2018 primarily related to the tax abandonment of the Kemper IGCC. Net cash provided from operating activities totaled $503 million for 2017, an increase of $274 million as compared to 2016. The increase in cash provided from operating activities in 2017 was primarily due to tax refunds associated with the Section 174 R&E settlement, largely offset by a decrease in income taxes related to the Kemper County energy facility and the Tax Reform Legislation.
Net cash used for investing activities in 2018, 2017, and 2016 totaled $232 million , $504 million , and $697 million , respectively. The cash used for investing activities in 2018 was primarily due to gross property additions related to other production, distribution, transmission, and steam production. The cash used for investing activities in 2017 and 2016 was primarily due to gross property additions related to the Kemper County energy facility. The cash used for investing activities in 2016 was partially offset by the receipt of Additional DOE Grants.
Net cash used for financing activities totaled $527 million in 2018 primarily due to redemption of preferred stock, long-term debt, short-term borrowings, and senior notes, partially offset by the issuance of senior notes and short-term borrowings. Net cash provided from financing activities totaled $25 million in 2017 primarily from capital contributions from Southern Company, largely offset by redemptions of long-term debt and short-term borrowings. Net cash provided from financing activities totaled $594 million in 2016 primarily due to long-term debt financings and capital contributions from Southern Company, partially offset by a decrease in short-term borrowings and redemptions of long-term debt.
Significant balance sheet changes in 2018 included increases of $442 million in long-term debt primarily due to the issuance of senior notes, a net change of $475 million in accumulated deferred income taxes primarily due to the tax abandonment of the

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2018 Annual Report

Kemper IGCC, and a decrease of $949 million in securities due within one year primarily due to the repayment of a $900 million unsecured term loan. See " Financing Activities " herein and Notes 8 and 10 to the financial statements for additional information.
Mississippi Power's ratio of common equity to total capitalization plus short-term debt was 50% and 39% at December 31, 2018 and 2017, respectively. The increase was primarily due to repayment of debt obligations in 2018. See Note 8 to the financial statements for additional information.
Sources of Capital
Mississippi Power plans to obtain the funds to meet its future capital needs from operating cash flows, external securities issuances, borrowings from financial institutions, including commercial paper to the extent Mississippi Power is eligible to participate, and equity contributions from Southern Company. However, the amount, type, and timing of any future financing, if needed, will depend upon prevailing market conditions, regulatory approval, and other factors.
The issuance of securities by Mississippi Power is subject to regulatory approval by the FERC. Additionally, with respect to the public offering of securities, Mississippi Power files registration statements with the SEC under the Securities Act of 1933, as amended. The amounts of securities authorized by the FERC, as well as the securities registered under the Securities Act of 1933, as amended, are continuously monitored and appropriate filings are made to ensure flexibility in raising capital. Any future financing through secured debt would also require approval by the Mississippi PSC.
Mississippi Power obtains financing separately without credit support from any affiliate. See Note 8 to the financial statements under "Bank Credit Arrangements" for additional information. The Southern Company system does not maintain a centralized cash or money pool. Therefore, funds of Mississippi Power are not commingled with funds of any other company in the Southern Company system.
Mississippi Power's current liabilities sometimes exceed current assets because of long-term debt maturities and the periodic use of short-term debt as a funding source, as well as significant seasonal fluctuations in cash needs. At December 31, 2018 , Mississippi Power had approximately $293 million of cash and cash equivalents. Committed credit arrangements with banks at December 31, 2018 were $100 million, all of which is unused. In October 2018, Mississippi Power amended its one-year credit arrangements in an aggregate amount of $100 million to extend the maturity dates from 2018 to 2019.
See Note 8 to the financial statements under "Bank Credit Arrangements" for additional information.
All of these bank credit arrangements contain covenants that limit debt levels and typically contain cross acceleration provisions to other indebtedness (including guarantee obligations) of Mississippi Power. Such cross-acceleration provisions to other indebtedness would trigger an event of default if Mississippi Power defaulted on indebtedness, the payment of which was then accelerated. At December 31, 2018, Mississippi Power was in compliance with all such covenants. None of the bank credit arrangements contain material adverse change clauses at the time of borrowing.
Subject to applicable market conditions, Mississippi Power expects to renew or replace its credit arrangements as needed, prior to expiration. In connection therewith, Mississippi Power may extend the maturity dates and/or increase or decrease the lending commitments thereunder.
A portion of the $100 million unused credit arrangements with banks is allocated to provide liquidity support to Mississippi Power's revenue bonds. The amount of variable rate revenue bonds outstanding requiring liquidity support at December 31, 2018 was approximately $40 million.
Short-term borrowings are included in notes payable in the balance sheets. Details of short-term borrowing were as follows:
 
Short-term Debt at the End of the Period
 
Short-term Debt During the Period (*)
 
Amount Outstanding
 
Weighted Average Interest Rate
 
Average Outstanding
 
Weighted Average Interest Rate
 
Maximum Amount Outstanding
 
(in millions)
 
 
 
(in millions)
 
 
 
(in millions)
December 31, 2018
$

 
%
 
$
68

 
2.0
%
 
$
300

December 31, 2017
$
4

 
3.8
%
 
$
18

 
3.0
%
 
$
36

December 31, 2016
$
23

 
2.6
%
 
$
112

 
2.0
%
 
$
500

(*)
Average and maximum amounts are based upon daily balances during the 12-month periods ended December 31, 2018, 2017, and 2016.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2018 Annual Report

Mississippi Power believes the need for working capital can be adequately met by utilizing lines of credit, short-term bank notes, commercial paper to the extent Mississippi Power is eligible to participate, and operating cash flows.
Financing Activities
In March 2018, Mississippi Power issued $300 million aggregate principal amount of Series 2018A Floating Rate Senior Notes due March 27, 2020 bearing interest based on three-month LIBOR and $300 million aggregate principal amount of Series 2018B 3.95% Senior Notes due March 30, 2028. In March 2018, Mississippi Power also entered into a $300 million short-term floating rate bank loan bearing interest based on one-month LIBOR, of which $200 million was repaid in the second quarter 2018 and $100 million was repaid in the third quarter 2018. Mississippi Power used the proceeds from these financings to repay a $900 million unsecured floating rate term loan.
In July 2018, Mississippi Power purchased and held approximately $43 million aggregate principal amount of Mississippi Business Finance Corporation Pollution Control Revenue Refunding Bonds, Series 2002. Mississippi Power may reoffer these bonds to the public at a later date.
In October 2018, Mississippi Power completed the redemption of all 334,210 outstanding shares of its preferred stock (as well as related depositary shares), with an aggregate par value of approximately $33.4 million; all $30 million aggregate principal amount outstanding of its Series G 5.40% Senior Notes due July 1, 2035; and all $125 million aggregate principal amount outstanding of its Series 2009A 5.55% Senior Notes due March 1, 2019.
In December 2018, Southern Company made equity contributions totaling $17 million to Mississippi Power.
In addition to any financings that may be necessary to meet capital requirements and contractual obligations, Mississippi Power plans, when economically feasible, to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit.
Credit Rating Risk
At December 31, 2018 , Mississippi Power does not have any credit arrangements that would require material changes in payment schedules or terminations as a result of a credit rating downgrade.
On October 2, 2018, the Mississippi PSC approved executed agreements between Mississippi Power and its largest retail customer, Chevron , for Mississippi Power to continue providing retail service to the Chevron refinery in Pascagoula, Mississippi through 2038. The agreements grant Chevron a security interest in the co-generation assets, with a net book value of approximately $101 million at December 31, 2018 , located at the refinery that is exercisable upon the occurrence of (i) certain bankruptcy events or (ii) other events of default coupled with specific reductions in steam output at the facility and a downgrade of Mississippi Power's credit rating to below investment grade by two of the three rating agencies.
There are certain contracts that have required or could require collateral, but not accelerated payment, in the event of a credit rating change to BBB and/or Baa2 or below. These contracts are for physical electricity purchases and sales, fuel transportation and storage, energy price risk management, and transmission. At December 31, 2018 , the maximum potential collateral requirements at a rating below BBB- and/or Baa3 equaled approximately $283 million.
Included in these amounts are certain agreements that could require collateral in the event that either Alabama Power or Georgia Power (affiliate companies of Mississippi Power) has a credit rating change to below investment grade. Generally, collateral may be provided by a Southern Company guaranty, letter of credit, or cash. Additionally, a credit rating downgrade could impact the ability of Mississippi Power to access capital markets and would be likely to impact the cost at which it does so.
On February 26, 2018, Moody's revised its rating outlook for Mississippi Power from stable to positive. On August 8, 2018, Moody's upgraded Mississippi Power's senior unsecured rating to Baa3 from Ba1 and maintained the positive rating outlook.
On February 28, 2018, Fitch removed Mississippi Power from rating watch negative and revised its rating outlook from stable to positive.
On March 14, 2018, S&P upgraded the senior unsecured long-term debt rating of Mississippi Power to A- from BBB+. The outlook remained negative.
As a result of the Tax Reform Legislation, certain financial metrics, such as the funds from operations to debt percentage, used by the credit rating agencies to assess Southern Company and its subsidiaries, including Mississippi Power, may be negatively impacted. The PEP Settlement Agreement is expected to help mitigate these potential adverse impacts by allowing Mississippi Power to retain the excess deferred taxes resulting from the Tax Reform Legislation until the conclusion of the Mississippi Power 2019 Base Rate Case. In addition, Mississippi Power has committed to seek equity contributions sufficient to restore its equity ratio to the 50% target. See Note 2 to the financial statements under "Mississippi Power" for additional information.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2018 Annual Report

Market Price Risk
Due to cost-based rate regulation and other various cost recovery mechanisms, Mississippi Power continues to have limited exposure to market volatility in interest rates, commodity fuel prices, and prices of electricity. To manage the volatility attributable to these exposures, Mississippi Power nets the exposures, where possible, to take advantage of natural offsets and enters into various derivative transactions for the remaining exposures pursuant to Mississippi Power's policies in areas such as counterparty exposure and risk management practices. Mississippi Power's policy is that derivatives are to be used primarily for hedging purposes and mandates strict adherence to all applicable risk management policies. Derivative positions are monitored using techniques that include, but are not limited to, market valuation, value at risk, stress testing, and sensitivity analysis.
To mitigate future exposure to a change in interest rates, Mississippi Power may enter into derivatives that have been designated as hedges. The weighted average interest rate on $340 million of long-term variable interest rate exposure at December 31, 2018 was 3.32%. If Mississippi Power sustained a 100 basis point change in interest rates for all long-term variable interest rate exposure, the change would have an immaterial effect on annualized interest expense at December 31, 2018 . See Note 1 to the financial statements under "Financial Instruments" and Note 14 to the financial statements for additional information.
To mitigate residual risks relative to movements in electricity prices, Mississippi Power enters into physical fixed-price contracts for the purchase and sale of electricity through the wholesale electricity market and, to a lesser extent, financial hedge contracts for natural gas purchases. Mississippi Power continues to manage retail fuel-hedging programs implemented per the guidelines of the Mississippi PSC and wholesale fuel-hedging programs under agreements with wholesale customers. Mississippi Power had no material change in market risk exposure for the year ended December 31, 2018 when compared to the year ended December 31, 2017 .
The changes in fair value of energy-related derivative contracts are substantially attributable to both the volume and the price of natural gas. For the years ended December 31, the changes in fair value of energy-related derivative contracts, the majority of which are composed of regulatory hedges, were as follows:
 
2018
Changes
 
2017
Changes
 
Fair Value
 
(in millions)
Contracts outstanding at the beginning of the period, assets (liabilities), net
$
(7
)
 
$
(7
)
Contracts realized or settled
3

 
8

Current period changes (*)
(2
)
 
(8
)
Contracts outstanding at the end of the period, assets (liabilities), net
$
(6
)
 
$
(7
)
(*)
Current period changes also include the changes in fair value of new contracts entered into during the period, if any.
The net hedge volumes of energy-related derivative contracts at December 31, 2018 and 2017 were as follows:
 
2018
 
2017
 
mmBtu Volume
 
(in millions)
Natural gas options
3

 

Natural gas swaps
60

 
53

Total hedge volume
63

 
53

For natural gas hedges, the weighted average swap contract cost above market prices was approximately $0.10 per mmBtu at December 31, 2018 and $0.14 per mmBtu at December 31, 2017 . The options outstanding were immaterial for the reporting periods presented. The costs associated with natural gas hedges are recovered through Mississippi Power's ECM clause.
At December 31, 2018 and 2017 , substantially all of Mississippi Power's energy-related derivative contracts were designated as regulatory hedges and were related to Mississippi Power's fuel-hedging program. Therefore, gains and losses are initially recorded as regulatory liabilities and assets, respectively, and then are included in fuel expense as they are recovered through the ECM clause.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2018 Annual Report

Mississippi Power uses over-the-counter contracts that are not exchange traded but are fair valued using prices which are market observable, and thus fall into Level 2 of the fair value hierarchy. See Note 13 to the financial statements for further discussion of fair value measurements. The maturities of the energy-related derivative contracts, which are all Level 2 of the fair value hierarchy, at December 31, 2018 were as follows:
 
Fair Value Measurements
December 31, 2018
 
Total
 
Maturity
 
Fair Value
 
Year 1
 
Years 2&3 
 
(in millions)
Level 1
$

 
$

 
$

Level 2
(6
)
 
(2
)
 
(4
)
Level 3

 

 

Fair value of contracts outstanding at end of period
$
(6
)
 
$
(2
)
 
$
(4
)
Mississippi Power is exposed to market price risk in the event of nonperformance by counterparties to the energy-related derivative contracts. Mississippi Power only enters into agreements and material transactions with counterparties that have investment grade credit ratings by Moody's and S&P or with counterparties who have posted collateral to cover potential credit exposure. Therefore, Mississippi Power does not anticipate market risk exposure from nonperformance by the counterparties. For additional information, see Note 1 to the financial statements under "Financial Instruments" and Note 14 to the financial statements.
Capital Requirements and Contractual Obligations
The construction program of Mississippi Power is currently estimated to total $222 million for 2019 , $230 million for 2020 , $216 million for 2021 , $220 million for 2022, and $184 million for 2023. The construction program includes capital expenditures covered under LTSAs. Estimated capital expenditures to comply with environmental laws and regulations included in these amounts are $18 million, $20 million, $17 million, $5 million, and $13 million for 2019 , 2020 , 2021 , 2022, and 2023, respectively. These estimated expenditures do not include any potential compliance costs associated with pending regulation of CO 2 emissions from fossil fuel-fired electric generating units. See FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Laws and Regulations" and "– Global Climate Issues" herein for additional information.
Mississippi Power also anticipates costs associated with closure and monitoring of ash ponds in accordance with the CCR Rule, which are reflected in Mississippi Power's ARO liabilities. These costs, which are expected to change and could change materially as underlying assumptions are refined and the cost and the method and timing of compliance activities continue to be evaluated, are currently estimated to be $9 million, $9 million, $12 million, $14 million, and $15 million for the years 2019 , 2020 , 2021 , 2022, and 2023, respectively. See FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Laws and Regulations – Coal Combustion Residuals" herein and Note 6 to the financial statements for additional information.
The construction program is subject to periodic review and revision, and actual construction costs may vary from these estimates because of numerous factors. These factors include: changes in business conditions; changes in load projections; storm impacts; changes in environmental laws and regulations; the outcome of any legal challenges to environmental rules; changes in generating plants, including unit retirements and replacements and adding or changing fuel sources at existing electric generating units, to meet regulatory requirements; changes in FERC rules and regulations; Mississippi PSC approvals; changes in the expected environmental compliance program; changes in legislation; the cost and efficiency of construction labor, equipment, and materials; project scope and design changes; and the cost of capital. In addition, there can be no assurance that costs related to capital expenditures will be fully recovered.
In addition, as discussed in Note 11 to the financial statements, Mississippi Power provides postretirement benefits to substantially all employees and funds trusts to the extent required by the FERC.
Funding requirements related to obligations associated with scheduled maturities of long-term debt, as well as the related interest, derivative obligations, pension and other post-retirement benefit plans, leases, other purchase commitments, and ARO settlements are detailed in the contractual obligations table that follows. See Notes 1 , 6 , 8 , 9 , 11 , and 14 to the financial statements for additional information.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2018 Annual Report

Contractual Obligations
Contractual obligations at December 31, 2018 were as follows:
 
2019
 
2020-
2021
 
2022-
2023
 
After
2023
 
Total
 
(in millions)
Long-term debt (a)  —
 
 
 
 
 
 
 
 
 
Principal
$

 
$
577

 
$

 
$
983

 
$
1,560

Interest
70

 
130

 
80

 
577

 
857

Financial derivative obligations (b)
3

 
5

 

 

 
8

Operating leases (c)
3

 
3

 
2

 
2

 
10

Purchase commitments —
 
 
 
 
 
 
 
 
 
Capital (d)
222

 
410

 
352

 

 
984

Fuel (e)
378

 
368

 
199

 
136

 
1,081

Long-term service agreements (f)
27

 
57

 
70

 
250

 
404

Purchased power (g)
11

 
35

 
36

 
435

 
517

ARO settlements (h)
9

 
21

 
29

 

 
59

Pension and other postretirement benefits plans (i)
8

 
15

 

 

 
23

Total
$
731

 
$
1,621

 
$
768

 
$
2,383

 
$
5,503

(a)
All amounts are reflected based on final maturity dates. Mississippi Power plans to continue, when economically feasible, to retire higher-cost sec urities and replace these obligations with lower-cost capital if market conditions permit. Variable rate interest obligations are estimated based on rates at December 31, 2018, as reflected in the statements of capitalization. Fixed rates include, where applicable, the effects of interest rate derivatives employed to manage interest rate risk. For additional information, see Note 8 to the financial statements.
(b)
Derivative obligations are for energy-related derivatives. For additional information, see Notes 1 and 14 to the financial statements.
(c)
See Note 9 to the financial statements for additional information.
(d)
Mississippi Power provides estimated capital expenditures for a five-year period, including capital expenditures associated with environmental regulations. At Dece mber 31, 2018, significant purchase commitments were outstanding in connection with the construction program. These amounts exclude capital expenditures covered under LTSAs and estimated capital expenditures for AROs , which are reflected separately. See FUTURE EARNINGS POTENTIAL – "Environmental Matters" for additional information.
(e)
Includes commitments to purchase coal and natural gas, as well as the related transportation and storage. In most cases, these contracts contain provisions for price escalation, minimum purchase levels, and other financial commitments. Natural gas purchase commitments are based on various indices at the time of delivery. Amounts reflected for natural gas purchase commitments have been estimated based on the NYMEX future prices at December 31, 2018.
(f)
LTSAs include price escalation based on inflation indices.
(g)
Estimated minimum long-term commitments for the purchase of solar energy. Energy costs associated with solar PPAs are recovered through the fuel clause. See Notes 2 and 9 to the financial statements for additional information.
(h)
Represents estimated costs for a five-year period associated with closing and monitoring ash ponds in accordance with the CCR Rule, which are reflected in Mississippi Power's ARO liabilities. Material expenditures in future years for ARO settlements also will be required for ash ponds and other liabilities reflected in Mississippi Power's AROs. See FUTURE EARNINGS POTENTIAL – " Environmental Matters Environmental Laws and Regulations Coal Combustion Residuals " herein and Note 6 to the financial statements for additional information.
(i)
Mississippi Power forecasts contributions to the pension and other postretirement benefit plans over a three-year period. Mississippi Power anticipates no mandatory contributions to the qualified pension plan during the next three years. Amounts presented represent estimated benefit payments for the nonqualified pension plans, estimated non-trust benefit payments for the other postretirement benefit plans, and estimated contributions to the other postretirement benefit plan trusts, all of which will be made from Mississippi Power's corporate assets. See Note 11 to the financial statements for additional information related to the pension and other postretirement benefit plans, including estimated benefit payments. Certain benefit payments will be made through the related benefit plans. Other benefit payments will be made from Mississippi Power's corporate assets.

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MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
Southern Power Company and Subsidiary Companies 2018 Annual Report


OVERVIEW
Business Activities
Southern Power develops, constructs, acquires, owns, and manages power generation assets, including renewable energy projects, and sells electricity at market-based rates in the wholesale market. Southern Power continually seeks opportunities to execute its strategy to create value through various transactions including acquisitions, dispositions, and sales of partnership interests, development and construction of new generating facilities, and entry into PPAs primarily with investor-owned utilities, IPPs, municipalities, electric cooperatives, and other load-serving entities, as well as commercial and industrial customers. In general, Southern Power commits to the construction or acquisition of new generating capacity only after entering into or assuming long-term PPAs for the new facilities.
During 2018 , Southern Power acquired and placed in service the 20-MW Gaskell West 1 solar facility, placed in service the 148-MW Cactus Flats wind facility, acquired and began construction of the 100-MW Wild Horse Mountain and the 200-MW Reading wind facilities, and continued construction of the expansion of the 385-MW Mankato natural gas facility. See FUTURE EARNINGS POTENTIAL – "Acquisitions" and "Construction Projects" herein for additional information.
Also during 2018, Southern Power completed the following sales of noncontrolling interests and sales of assets resulting in approximately $2.6 billion in proceeds:
On May 22, 2018, Southern Power sold a noncontrolling 33% equity interest in SP Solar, a limited partnership indirectly owning substantially all of Southern Power's solar facilities, for approximately $1.2 billion.
On December 4, 2018, Southern Power sold all of its equity interests in Plant Oleander and Plant Stanton Unit A (together, the Florida Plants) to NextEra Energy for $203 million.
On December 11, 2018, Southern Power sold a noncontrolling tax equity interest in SP Wind, a holding company owning a portfolio of eight operating wind facilities, for approximately $1.2 billion.
In addition, on November 5, 2018, Southern Power entered into an agreement to sell all of its equity interests in Plant Mankato (including the 385-MW expansion currently under construction) for an aggregate purchase price of approximately $650 million. The completion of the disposition is subject to the expansion unit reaching commercial operation as well as various other customary conditions to closing, including FERC and state commission approvals, and the sale is expected to close mid-2019. The ultimate outcome of this matter cannot be determined at this time.
At December 31, 2018 , Southern Power's generation fleet, which is owned in part with its various partners, totaled 11,888 MWs of nameplate capacity in commercial operation (including 4,508 MWs of nameplate capacity owned by its subsidiaries and including Plant Mankato, which is classified as held for sale in the financial statements). The average remaining duration of Southern Power's total portfolio of wholesale contracts is approximately 14 years, which reduces remarketing risk for Southern Power. With the inclusion of the PPAs and investments associated with renewable and natural gas facilities currently under construction, Southern Power has an average investment coverage ratio, at December 31, 2018, of 93 % through 2023 and 91 % through 2028 (including Plant Mankato, which is classified as held for sale in the financial statements).
Southern Power's future earnings will be materially decreased as a result of the asset and non-controlling interest sales described above. In addition, Southern Power's future earnings will depend on the parameters of the wholesale market and the efficient operation of its wholesale generating assets, as well as Southern Power's ability to execute its growth strategy and to develop and construct generating facilities. In addition, Southern Power's future earnings may be impacted by the availability of federal and state solar ITCs and wind PTCs on its renewable energy projects, which could be impacted by future tax legislation. See FUTURE EARNINGS POTENTIAL – "General," "Acquisitions," "Construction Projects," and "Income Tax Matters" herein and Notes 10 and 15 to the financial statements for additional information.
To evaluate operating results and to ensure Southern Power's ability to meet its contractual commitments to customers, Southern Power continues to focus on several key performance indicators, including, but not limited to, peak season equivalent forced outage rate, contract availability, and net income.
See RESULTS OF OPERATIONS herein for information on Southern Power's financial performance.
Earnings
Southern Power's 2018 net income was $187 million, an $884 million decrease from 2017 , primarily attributable to $743 million of tax benefits recognized in 2017 and $79 million in tax expense recognized in 2018, both related to the Tax Reform Legislation. Also contributing to the decrease were asset impairment charges in 2018 totaling $156 million ($120 million pre-tax for the

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Florida Plants and $36 million pre-tax for turbine equipment held for development projects, which together totaled $117 million after tax), partially offset by approximately $65 million in state income tax benefits arising from reorganizations of legal entities that own and operate certain of Southern Power's solar and wind facilities.
Southern Power's 2017 net income was $1.1 billion , a $733 million increase from 2016 , primarily attributable to $743 million in tax benefits recognized in 2017 related to the Tax Reform Legislation. Also contributing to the change were increases in operating expenses and interest expense related to Southern Power's growth strategy and continuous construction program, largely offset by increased renewable energy sales.
In addition, tax benefits from wind PTCs significantly impacted Southern Power's net income in 2018 and 2017. Tax benefits from solar ITCs related to the acquisition and construction of new facilities also significantly impacted Southern Power's net income in 2017 and 2016. See Note 10 to the financial statements under "Effective Tax Rate" for additional information.
RESULTS OF OPERATIONS
A condensed statement of income follows:
 
Amount
 
Increase (Decrease)
from Prior Year
 
2018
 
2018
 
2017
 
(in millions)
Operating revenues
$
2,205

 
$
130

 
$
498

Fuel
699

 
78

 
165

Purchased power
176

 
27

 
47

Other operations and maintenance
395

 
9

 
32

Depreciation and amortization
493

 
(10
)
 
151

Taxes other than income taxes
46

 
(2
)
 
25

Asset impairment
156

 
156

 

Gain on disposition
(2
)
 
(2
)
 

Total operating expenses
1,963

 
256

 
420

Operating income
242

 
(126
)
 
78

Interest expense, net of amounts capitalized
183

 
(8
)
 
74

Other income (expense), net
23

 
22

 
(5
)
Income taxes (benefit)
(164
)
 
775

 
(744
)
Net income
246

 
(871
)
 
743

Net income attributable to noncontrolling interests
59

 
13

 
10

Net income attributable to Southern Power
$
187

 
$
(884
)
 
$
733

Operating Revenues
Total operating revenues include PPA capacity revenues, which are derived primarily from long-term contracts involving natural gas and biomass generating facilities, and PPA energy revenues from Southern Power's generation facilities. To the extent Southern Power has capacity not contracted under a PPA, it may sell power into an accessible wholesale market, or, to the extent those generation assets are part of the FERC-approved IIC, it may sell power into the power pool.
Natural Gas and Biomass Capacity and Energy Revenue
Capacity revenues generally represent the greatest contribution to operating income and are designed to provide recovery of fixed costs plus a return on investment.
Energy is generally sold at variable cost or is indexed to published natural gas indices. Energy revenues will vary depending on the energy demand of Southern Power's customers and their generation capacity, as well as the market prices of wholesale energy compared to the cost of Southern Power's energy. Energy revenues also include fees for support services, fuel storage, and unit start charges. Increases and decreases in energy revenues under PPAs that are driven by fuel or purchased power prices are accompanied by an increase or decrease in fuel and purchased power costs and do not have a significant impact on net income.

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Southern Power Company and Subsidiary Companies 2018 Annual Report

Solar and Wind Energy Revenue
Southern Power's energy sales from solar and wind generating facilities are predominantly through long-term PPAs that do not have a capacity charge. Customers either purchase the energy output of a dedicated renewable facility through an energy charge or pay a fixed price related to the energy generated from the respective facility and sold to the grid. As a result, Southern Power's ability to recover fixed and variable operations and maintenance expenses is dependent upon the level of energy generated from these facilities, which can be impacted by weather conditions, equipment performance, transmission constraints, and other factors.
See FUTURE EARNINGS POTENTIAL – "Power Sales Agreements" herein for additional information regarding Southern Power's PPAs.
Details of Southern Power's operating revenues were as follows:
 
2018
 
2017
 
2016
 
 
 
(in millions)
 
 
PPA capacity revenues
$
580

 
$
599

 
$
541

PPA energy revenues
1,140

 
970

 
694

Total PPA revenues
1,720

 
1,569

 
1,235

Non-PPA revenues
472

 
494

 
330

Other revenues
13

 
12

 
12

Total operating revenues
$
2,205

 
$
2,075

 
$
1,577

Operating revenues for 2018 were $2.2 billion , reflecting a $130 million , or 6%, increase from 2017 . The increase in operating revenues was primarily due to the following:
PPA capacity revenues decreased $19 million, or 3%, primarily due to decreases of $16 million from the contractual expiration of an affiliate natural gas PPA and $5 million from the Florida Plants sold in December 2018.
PPA energy revenues increased $170 million, or 18%, primarily due to a $142 million increase in sales related to existing natural gas facilities driven by an $88 million increase in the average cost of fuel and a $54 million increase in the volume of KWHs sold due to customer load, a $12 million increase related to PPAs associated with new renewable facilities, and a $16 million increase related to PPAs associated with existing renewable facilities primarily due to an increase in the volume of KWHs sold.
Non-PPA revenues decreased $22 million, or 4%, primarily due to a $56 million decrease in the volume of KWHs sold from uncovered natural gas capacity through short-term sales, partially offset by a $35 million increase in the market price of energy.
Operating revenues for 2017 were $2.1 billion, reflecting a $498 million, or 32%, increase from 2016 . The increase in operating revenues was primarily due to the following:
PPA capacity revenues increased $58 million, or 11%, primarily due to additional customer capacity requirements and a new PPA related to Plant Mankato acquired in late 2016.
PPA energy revenues increased $276 million, or 40%, primarily due to a $213 million increase in renewable energy sales arising from new solar and wind facilities and a $50 million increase in sales related to existing natural gas PPAs primarily due to an $85 million increase in the average cost of fuel, partially offset by a $35 million decrease in the volume of KWHs sold primarily due to reduced customer load.
Non-PPA revenues increased $164 million, or 50%, primarily due to a $156 million increase in the volume of KWHs sold primarily from uncovered natural gas capacity through short-term opportunity sales, as well as an $8 million increase in the market price of energy.

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Southern Power Company and Subsidiary Companies 2018 Annual Report

Fuel and Purchased Power Expenses
Details of Southern Power's generation and purchased power were as follows:
 
Total
KWHs
Total KWH % Change
Total
KWHs
Total KWH % Change
 
2018
 
2017
 
 
(in billions of KWHs)
Generation
46
 
44
 
Purchased power
4
 
5
 
Total generation and purchased power
50
2%
49
23%
Total generation and purchased power, excluding solar, wind, and tolling agreements
29
4%
28
22%
Southern Power's PPAs for natural gas and biomass generation generally provide that the purchasers are responsible for either procuring the fuel (tolling agreements) or reimbursing Southern Power for substantially all of the cost of fuel relating to the energy delivered under such PPAs. Consequently, changes in such fuel costs are generally accompanied by a corresponding change in related fuel revenues and do not have a significant impact on net income. Southern Power is responsible for the cost of fuel for generating units that are not covered under PPAs. Power from these generating units is sold into the wholesale market or into the power pool for capacity owned directly by Southern Power.
Purchased power expenses will vary depending on demand, availability, and the cost of generating resources throughout the Southern Company system and other contract resources. Load requirements are submitted to the power pool on an hourly basis and are fulfilled with the lowest cost alternative, whether that is generation owned by Southern Power, an affiliate company, or external parties. Such purchased power costs are generally recovered through PPA revenues.
Details of Southern Power's fuel and purchased power expenses were as follows:
 
2018
 
2017
 
2016
 
 
 
(in millions)
 
 
Fuel
$
699

 
$
621

 
$
456

Purchased power
176

 
149

 
102

Total fuel and purchased power expenses
$
875

 
$
770

 
$
558

In 2018 , total fuel and purchased power expenses increased $105 million, or 14%, compared to 2017 . Fuel expense increased $78 million, or 13%, primarily due to a $60 million increase associated with the volume of KWHs generated, excluding solar, wind, and tolling agreements, primarily due to customer load, and an $18 million increase associated with the average cost of natural gas per KWH generated. Purchased power expense increased $27 million, or 18%, primarily due to a $43 million increase associated with the average cost of purchased power, primarily in the first quarter 2018, partially offset by a $16 million decrease associated with the volume of KWHs purchased.
In 2017 , total fuel and purchased power expenses increased $212 million, or 38%, compared to 2016. Fuel expense increased $165 million, or 36%, primarily due to an $83 million increase associated with the volume of KWHs generated, excluding solar, wind, and tolling agreements, and an $82 million increase associated with the average cost of natural gas per KWH generated. Purchased power expense increased $47 million, or 46%, primarily due to a $37 million increase associated with the volume of KWHs purchased and an $11 million increase associated with the average cost of purchased power.
Other Operations and Maintenance Expenses
In 2018 , other operations and maintenance expenses increased $9 million, or 2%, compared to 2017 . The increase was primarily due to scheduled outage and maintenance expenses. In 2017 , other operations and maintenance expenses increased $32 million, or 9%, compared to 2016. The increase was primarily due to increases of $56 million associated with new facilities, $21 million in business development and support expenses, and $6 million in employee compensation, all associated with Southern Power's overall growth. These 2017 increases were partially offset by decreases of $35 million associated with scheduled outage and maintenance expenses and $15 million in non-outage operations and maintenance expenses.

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Southern Power Company and Subsidiary Companies 2018 Annual Report

Depreciation and Amortization
In 2018 , depreciation and amortization decreased $10 million, or 2%, compared to 2017 , primarily due to the cessation of depreciation on the Florida Plants and Plant Mankato that were classified as held for sale in May and November 2018, respectively. In 2017 , depreciation and amortization increased $151 million, or 43%, compared to 2016 , primarily due to additional depreciation related to new solar, wind, and natural gas facilities placed in service. See Note 5 to the financial statements under " Depreciation and Amortization Southern Power " and Note 15 to the financial statements under "Southern Power" and "Assets Held for Sale" for additional information.
Taxes Other Than Income Taxes
In 2018 , taxes other than income taxes decreased $2 million, or 4%, compared to 2017. In 2017 , taxes other than income taxes were $48 million compared to $23 million in 2016 , primarily due to additional property taxes on new facilities.
Asset Impairment
In 2018 , asset impairment charges were $156 million. In the second quarter 2018, a $119 million asset impairment charge was recorded in contemplation of the sale of the Florida Plants. In addition, in the third quarter 2018, a $36 million asset impairment charge was recorded on wind turbine equipment held for development projects. There were no asset impairment charges recorded in 2017 or 2016. See Note 15 to the financial statements under "Southern Power – Sales of Natural Gas Plants " and " – Development Projects" for additional information.
Interest Expense, Net of Amounts Capitalized
In 2018 , interest expense, net of amounts capitalized decreased $8 million, or 4%, compared to 2017 . The decrease was primarily due to an increase in capitalized interest associated with construction projects. In 2017 , interest expense, net of amounts capitalized increased $74 million, or 63%, compared to 2016. The increase was primarily due to an increase of $44 million in interest expense related to an increase in average outstanding long-term debt, primarily to fund Southern Power's growth strategy and continuous construction program, as well as a $30 million decrease in capitalized interest associated with completing construction of and placing in service solar facilities.
Other Income (Expense), Net
In 2018 , other income (expense), net increased $22 million compared to 2017 primarily due to a $14 million gain from a joint-development wind project, which is attributable to Southern Power's partner in the project and fully offset within noncontrolling interests. In 2017 , other income (expense), net decreased $5 million compared to 2016 .
Income Taxes (Benefit)
In 2018 , income tax benefit was $164 million compared to $939 million for 2017 , a decrease of $775 million, primarily attributable to a $743 million tax benefit in 2017 and a $79 million tax expense in 2018, both related to the remeasurement of accumulated deferred income taxes in accordance with the Tax Reform Legislation. In addition, income tax benefits associated with solar ITCs decreased by $58 million as a result of fewer solar facilities being placed in service in 2018 as compared to 2017. These decreases were partially offset by $65 million of income tax benefits related to certain changes in state apportionment rates arising from reorganizations of Southern Power's legal entities that own and operate certain of its solar and wind facilities and a decrease of $47 million of income tax expense as a result of lower pre-tax earnings and the lower federal tax rate.
In 2017 , income tax benefit was $939 million compared to $195 million for 2016 of which $743 million of the increase was related to the Tax Reform Legislation. The remaining increase in tax benefit was primarily due to an increase of $89 million in PTCs from wind generation in 2017 and other state income taxes, significantly offset by a decrease in tax benefits associated with lower ITCs from solar facilities placed in service.
See FUTURE EARNINGS POTENTIAL – " Income Tax Matters Federal Tax Reform Legislation " herein and Notes 1 and 10 to the financial statements under "Income and Other Taxes" and "Effective Tax Rate," respectively, for additional information.
Net Income Attributable to Noncontrolling Interests
In 2018, net income attributable to noncontrolling interests increased $13 million, or 28%, compared to 2017 . The increase was primarily due to $20 million of net income allocations due to the sale of a noncontrolling 33% equity interest in SP Solar and $14 million of other income allocations attributable to a joint-development wind project, partially offset by a reduction of $19 million due to HLBV income allocations between Southern Power and tax equity partners for partnerships entered into during 2018. In

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2017, noncontrolling interests increased $10 million, or 28%, compared to 2016 primarily due to additional net income allocations from new solar partnerships.
Effects of Inflation
Southern Power is party to long-term contracts reflecting market-based rates, including inflation expectations. Any adverse effect of inflation on Southern Power's results of operations has not been substantial in recent years.
FUTURE EARNINGS POTENTIAL
General
The results of operations for the past three years are not necessarily indicative of Southern Power's future earnings potential. Southern Power completed multiple sales of noncontrolling interests and assets in 2018 as described below. These sales will materially decrease future earnings and cash flows to Southern Power. See below for a summary of the 2018 disposition activity. The level of Southern Power's future earnings also depends on numerous factors that affect the opportunities, challenges, and risks of Southern Power's competitive wholesale business. These factors include: Southern Power's ability to achieve sales growth while containing costs; regulatory matters; creditworthiness of customers; total generating capacity available in Southern Power's market areas; the successful remarketing of capacity as current contracts expire; and Southern Power's ability to execute its growth strategy through the development or acquisition of renewable facilities and other energy projects.
On May 22, 2018, Southern Power completed the sale of a noncontrolling 33% equity interest in SP Solar, a limited partnership indirectly owning substantially all of Southern Power's solar facilities, to Global Atlantic Financial Group Limited (Global Atlantic) for an aggregate purchase price of approximately $1.2 billion. Accordingly, Global Atlantic will receive 33% of all cash distributions paid by SP Solar. Southern Power continues to consolidate the assets and liabilities of SP Solar with Global Atlantic's share of partnership earnings included in net income attributable to noncontrolling interests in the consolidated statements of income, which was $20 million for the period from May 22, 2018 to December 31, 2018.
Southern Power completed the sale of all of its equity interests in the Florida Plants to NextEra Energy on December 4, 2018, for an aggregate purchase price of $203 million. Pre-tax net income for the Florida Plants was $49 million and $37 million for the period from January 1, 2018 to December 4, 2018 and for the year ended December 31, 2017, respectively.
On December 11, 2018, Southern Power completed the sale of a noncontrolling tax equity interest in SP Wind, which owns a portfolio of eight operating wind facilities, to three financial investors, for approximately $1.2 billion. The tax equity investors together will generally receive 40% of the cash distributions from available cash and will receive a 99% allocation of tax attributes, including PTCs. Southern Power continues to consolidate the assets and liabilities of SP Wind with the investors' shares of partnership earnings reflected in net income attributable to noncontrolling interests in the consolidated statements of income.
On November 5, 2018, Southern Power entered into an agreement with Northern States Power to sell all of its equity interests in Plant Mankato (including the 385-MW expansion currently under construction) for an aggregate purchase price of approximately $650 million. The completion of the disposition is subject to the expansion unit reaching commercial operation as well as various other customary conditions to closing, including working capital and timing adjustments. Pre-tax net income for Plant Mankato was immaterial for the years ended December 31, 2018 and 2017. This transaction is subject to FERC and state commission approvals and is expected to close mid-2019. The ultimate outcome of this matter cannot be determined at this time.
Demand for electricity is primarily driven by the pace of economic growth that may be affected by changes in regional and global economic conditions, as well as renewable portfolio standards, which may impact future earnings. Other factors that could influence future earnings include weather, transmission constraints, cost of generation from units within the power pool, and operational limitations.
Power Sales Agreements
General
Southern Power has PPAs with some of Southern Company's traditional electric operating companies, other investor-owned utilities, IPPs, municipalities, and other load-serving entities, as well as commercial and industrial customers. The PPAs are expected to provide Southern Power with a stable source of revenue during their respective terms.
Many of Southern Power's PPAs have provisions that require Southern Power or the counterparty to post collateral or an acceptable substitute guarantee in the event that S&P or Moody's downgrades the credit ratings of the respective company to an unacceptable credit rating or if the counterparty is not rated or fails to maintain a minimum coverage ratio.

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Southern Power Company and Subsidiary Companies 2018 Annual Report

On January 29, 2019, Pacific Gas & Electric Company (PG&E) filed petitions to reorganize under Chapter 11 of the U.S. Bankruptcy Code. Southern Power, together with its noncontrolling partners, owns four solar facilities where PG&E is the energy off-taker for approximately 207 MWs of capacity under long-term PPAs. PG&E is also the transmission provider for these facilities and two of Southern Power's other solar facilities. Southern Power has evaluated the recoverability of its investments in these solar facilities under various scenarios, including selling the related energy into the competitive markets, and has concluded they are not impaired. At December 31, 2018, Southern Power had outstanding accounts receivables due from PG&E of $1 million related to the PPAs and $36 million related to the transmission interconnections (of which $17 million is classified in other deferred charges and assets). Southern Power does not expect a material impact to its financial statements if, as a result of the bankruptcy proceedings, PG&E does not perform in accordance with the PPAs or the terms of the PPAs are renegotiated; however, the ultimate outcome of this matter cannot be determined at this time.
Southern Power is working to maintain and expand its share of the wholesale markets. Southern Power expects there to be new demand for capacity that will develop in the 2019-2021 timeframe. The amount of available demand and timing will vary across the wholesale markets. Southern Power calculates an investment coverage ratio for its generating assets, which includes those assets owned in part with its various partners, based on the ratio of investment under contract to total investment using the respective generation facilities' net book value (or expected in-service value for facilities under construction) as the investment amount. With the inclusion of investments associated with the wind and natural gas facilities currently under construction, as well as other capacity and energy contracts, Southern Power has an average investment coverage ratio of 93 % through 2023 and 91 % through 2028, with an average remaining contract duration of approximately 14 years (including Plant Mankato, which is classified as held for sale in the financial statements). See "Acquisitions" and "Construction Projects" herein for additional information.
Natural Gas and Biomass
Southern Power's electricity sales from natural gas and biomass generating units are primarily through long-term PPAs that consist of two types of agreements. The first type, referred to as a unit or block sale, is a customer purchase from a dedicated generating unit where all or a portion of the generation from that unit is reserved for that customer. Southern Power typically has the ability to serve the unit or block sale customer from an alternate resource. The second type, referred to as requirements service, provides that Southern Power serve the customer's capacity and energy requirements from a combination of the customer's own generating units and from Southern Power resources not dedicated to serve unit or block sales. Southern Power has rights to purchase power provided by the requirements customers' resources when economically viable.
As a general matter, substantially all of the PPAs provide that the purchasers are responsible for either procuring the fuel (tolling agreements) or reimbursing Southern Power for substantially all of the cost of fuel or purchased power relating to the energy delivered under such PPAs. To the extent a particular generating facility does not meet the operational requirements contemplated in the PPAs, Southern Power may be responsible for excess fuel costs. With respect to fuel transportation risk, most of Southern Power's PPAs provide that the counterparties are responsible for the availability of fuel transportation to the particular generating facility.
Capacity charges that form part of the PPA payments are designed to recover fixed and variable operation and maintenance costs based on dollars-per-kilowatt year. In general, to reduce Southern Power's exposure to certain operation and maintenance costs, Southern Power has LTSAs. See Note 1 to the financial statements under "Long-Term Service Agreements" for additional information.
Solar and Wind
Southern Power's electricity sales from solar and wind (renewables) generating facilities are also made pursuant to long-term PPAs; however, these solar and wind PPAs do not have a capacity charge and customers either purchase the energy output of a dedicated renewable facility through an energy charge or provide Southern Power a certain fixed price for the electricity sold to the grid. As a result, Southern Power's ability to recover fixed and variable operations and maintenance expenses is dependent upon the level of energy generated from these facilities, which can be impacted by weather conditions, equipment performance, transmission constraints, and other factors. Generally, under the solar and wind generation PPAs, the purchasing party retains the right to keep or resell the renewable energy credits.
Environmental Matters
Southern Power's operations are regulated by state and federal environmental agencies through a variety of laws and regulations governing air, water, land, and protection of other natural resources. Southern Power maintains a comprehensive environmental compliance strategy to assess upcoming requirements and compliance costs associated with these environmental laws and regulations. The costs, including capital expenditures and operations and maintenance costs, required to comply with

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environmental laws and regulations may impact results of operations, cash flows, and financial condition. Compliance costs may result from the installation of additional environmental controls. The ultimate impact of the environmental laws and regulations discussed below will depend on various factors, such as state adoption and implementation of requirements, the availability and cost of any deployed control technology, fuel prices, and the outcome of pending and/or future legal challenges.
New or revised environmental laws and regulations could affect many areas of Southern Power's operations. Southern Power's PPAs generally contain provisions that permit charging the counterparty with some of the new costs incurred as a result of changes in environmental laws and regulations.
Since Southern Power's units are newer natural gas and renewable generating facilities, costs associated with environmental compliance for these facilities have been less significant than for similarly situated coal or older natural gas generating facilities. Environmental, natural resource, and land use concerns, including the applicability of air quality limitations, the potential presence of wetlands or threatened and endangered species, the availability of water withdrawal rights, uncertainties regarding aesthetic impacts such as increased light or noise, and concerns about potential adverse health impacts, can, however, increase the cost of siting and operating any type of future electric generating facility. The impact of such laws and regulations on Southern Power and subsequent recovery through PPA provisions cannot be determined at this time.
Environmental Laws and Regulations
Air Quality
In 2011, the EPA finalized the Cross-State Air Pollution Rule (CSAPR) to address impacts of SO 2 and NO X emissions from fossil fuel-fired electric generating plants. CSAPR establishes emissions trading programs and budgets for certain states and allocates emissions allowances for sources in those states. In 2016, the EPA published a final rule establishing more stringent ozone season NO X emissions budgets in Alabama and Texas . The EPA also removed North Carolina from this particular CSAPR program. Georgia's ozone season NO X emissions budget remained unchanged. Increases in either future fossil fuel-fired generation or the availability or cost of CSAPR allowances could have a negative financial impact on results of operations for Southern Power .
Water Quality
In 2014, the EPA finalized requirements under Section 316(b) of the Clean Water Act (CWA) to regulate cooling water intake structures (CWIS) to minimize their effects on fish and other aquatic life at existing power plants (e.g. coal, natural gas, oil, and nuclear generating plants) and manufacturing facilities. The regulation requires plant-specific studies to determine applicable CWIS changes to protect organisms that either get caught on the intake screens (impingement) or are drawn into the cooling system (entrainment). Southern Power is conducting these studies and currently anticipates such changes will be limited to minor additions of monitoring equipment at certain of its electric generating plants. However, the ultimate impact of this rule will depend on the outcome of these plant-specific studies, any additional protective measures required to be incorporated into each plant's National Pollutant Discharge Elimination System (NPDES) permit based on site-specific factors, and the outcome of any legal challenges.
In 2015, the EPA and the U.S. Army Corps of Engineers (Corps) jointly published a final rule that revised the regulatory definition of waters of the United States (WOTUS) for all CWA programs. The rule significantly expanded the scope of federal jurisdiction over waterbodies (such as rivers, streams, canals, and wastewater treatment ponds), which could impact new generation projects . The EPA and the Corps are expected to publish a final rule in 2019 to replace the 2015 WOTUS definition. The impact of any changes to the 2015 WOTUS rule will depend on the content of this final rule and the outcome of any legal challenges.
Global Climate Issues
On December 20, 2018, the EPA published a proposed review of the Standards of Performance for Greenhouse Gas Emissions from New, Modified, and Reconstructed Stationary Sources: Electric Utility Generating Units final rule (2015 NSPS rule). The EPA's final 2015 NSPS rule set standards of performance for new, modified, and reconstructed electric utility generating units which included stationary combustion turbines and fossil-fired steam boilers. This proposal reduces the stringency of the 2015 NSPS rule by not basing the new and reconstructed fossil-fired steam boiler standards on partial carbon capture and sequestration. The impact of any changes to this rule will depend on the content of the final rule and the outcome of any legal challenges.
The EPA's GHG reporting rule requires annual reporting of GHG emissions expressed in terms of metric tons of CO 2 equivalent emissions for a company's operational control of facilities. Based on ownership or financial control of facilities, Southern Power's 2017 GHG emissions were approximately 13 million metric tons of CO 2 equivalent. The preliminary estimate of Southern Power's 2018 GHG emissions on the same basis is approximately 14 million metric tons of CO 2 equivalent.

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Southern Power Company and Subsidiary Companies 2018 Annual Report

Income Tax Matters
Consolidated Income Taxes
On behalf of Southern Power, Southern Company files a consolidated federal income tax return and various state income tax returns, some of which are combined or unitary. Under a joint consolidated income tax allocation agreement, each Southern Company subsidiary's current and deferred tax expense is computed on a stand-alone basis and no subsidiary is allocated more current expense than would be paid if it filed a separate income tax return. In accordance with IRS regulations, each company is jointly and severally liable for the federal tax liability.
The impact of certain tax events at Southern Company and/or its other subsidiaries can, and does, affect Southern Power's ability to utilize certain tax credits. See "Tax Credits" and ACCOUNTING POLICIES – "Application of Critical Accounting Policies and Estimates" herein and Note 10 to the financial statements for additional information.
Southern Power currently has unutilized federal ITC and PTC carryforwards totaling approximately $2.1 billion , and thus has utilized tax equity partnerships where the tax partner will take significantly all of the respective federal tax benefits on a prospective basis. These tax equity partnerships are consolidated in Southern Power's financial statements using the HLBV methodology to allocate partnership gains and losses. See Note 1 to the financial statements for additional information.
Federal Tax Reform Legislation
In December 2017, the Tax Reform Legislation was signed into law and became effective on January 1, 2018. The Tax Reform Legislation, among other things, reduced the federal corporate income tax rate to 21%, retained existing renewable energy incentives, and repealed the corporate alternative minimum tax. In addition, under the Tax Reform Legislation, NOLs generated after December 31, 2017 can no longer be carried back to previous tax years but can be carried forward indefinitely, with utilization limited to 80% of taxable income of the subsequent tax year. The projected reduction of Southern Company's consolidated income tax liability resulting from the tax rate reduction also delays the expected utilization of existing tax credit carryforwards.
Following the enactment of the Tax Reform Legislation, the SEC staff issued Staff Accounting Bulletin 118 – "Income Tax Accounting Implications of the Tax Cuts and Jobs Act" (SAB 118), which provided for a measurement period of up to one year from the enactment date to complete accounting under GAAP for the tax effects of the legislation. Due to the complex and comprehensive nature of the enacted tax law changes and their application under GAAP, Southern Power considered all amounts recorded in the financial statements as a result of the Tax Reform Legislation "provisional" as discussed in SAB 118 and subject to revision prior to filing its 2017 tax return in the fourth quarter 2018. Southern Power recognized tax benefits of $743 million in 2017. Following the filing of its 2017 tax return, Southern Power recorded tax expense of $79 million to adjust the provisional amount for a total net tax benefit of $664 million as a result of the Tax Reform Legislation. As of December 31, 2018, Southern Power considered the measurement of impacts from the Tax Reform Legislation on deferred income tax assets and liabilities, primarily due to the impact of the reduction of the corporate income tax rate, to be complete.
However, the IRS continues to issue regulations that provide further interpretation and guidance on the law and each state's adoption of the provisions contained in the Tax Reform Legislation remains uncertain. The ultimate impact of this matter cannot be determined at this time. In addition, the regulatory treatment of certain impacts of the Tax Reform Legislation is subject to the discretion of the FERC. See Note 10 to the financial statements under "Current and Deferred Income Taxes" for additional information.
Tax Credits
The Tax Reform Legislation retained the renewable energy incentives that were included in the PATH Act. The PATH Act allows for 30% ITC for solar projects that commence construction by December 31, 2019; 26% ITC for solar projects that commence construction in 2020; 22% ITC for solar projects that commence construction in 2021; and a permanent 10% ITC for solar projects that commence construction on or after January 1, 2022. In addition, the PATH Act allows for 100% PTC for wind projects that commenced construction in 2016; 80% PTC for wind projects that commenced construction in 2017; 60% PTC for wind projects that commence construction in 2018; and 40% PTC for wind projects that commence construction in 2019. Wind projects commencing construction after 2019 will not be entitled to any PTCs. Southern Power has received ITCs related to its investment in new solar facilities acquired or constructed and receives PTCs related to the first 10 years of energy production from its wind facilities, which have had, and may continue to have, a material impact on Southern Power's cash flows and net income. In 2018, Southern Power sold noncontrolling tax equity interests in SP Wind and Cactus Flats, which both qualify for PTCs, and Gaskell West 1, which qualifies for ITCs. Under these partnerships, the tax equity investors will receive 99% of the PTC and ITC tax benefits and, therefore, Southern Power's tax benefits will be materially reduced. At December 31, 2018,

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Southern Power Company and Subsidiary Companies 2018 Annual Report

Southern Power had approximately $2.1 billion of unutilized ITCs and PTCs, which are currently expected to be fully utilized by 2022, but could be further delayed. See Note 1 to the financial statements under "Income and Other Taxes" and Note 10 to the financial statements under "Current and Deferred Income Taxes – Tax Credit Carryforwards" and "Effective Tax Rate" for additional information regarding utilization and amortization of credits and the tax benefit related to associated basis differences.
Bonus Depreciation
Under the Tax Reform Legislation, projects with binding contracts prior to September 28, 2017 and placed in service after September 27, 2017 remain eligible for bonus depreciation under the PATH Act. The PATH Act allowed for 50% bonus depreciation for 2015 through 2017, 40% bonus depreciation for 2018, and 30% bonus depreciation for 2019 and certain long-lived assets placed in service in 2020. Southern Power is not expecting material cash flows from bonus depreciation for the 2018 or 2019 tax years. However, any cash flows resulting from bonus depreciation would also be impacted by Southern Power's use of tax equity partnerships. See Note 10 to the financial statements under "Current and Deferred Income Taxes" for additional information. The ultimate outcome of these matters cannot be determined at this time.
Acquisitions
During 2018 , Southern Power acquired and completed the project below and acquired the Wild Horse Mountain and Reading wind facilities discussed under "Construction Projects" herein. See Note 15 to the financial statements under " Southern Power " for additional information.
Project Facility
Resource
Seller, Acquisition Date
Approximate Nameplate Capacity ( MW )
Location
Ownership
Percentage
Actual COD
PPA Counterparties
PPA Contract Period
Gaskell West 1
Solar
Recurrent Energy Development Holdings, LLC, January 26, 2018
20
Kern County, CA
100% of Class B
(*)
March 2018
Southern California Edison
20 years
(*)
Southern Power owns 100% of the class B membership interests under a tax equity partnership.
The Gaskell West 1 facility did not have operating revenues or activities prior to being placed in service during March 2018.
Construction Projects
Construction Projects Completed and/or in Progress
During 2018, in accordance with its growth strategy, Southern Power started, continued, or completed construction of the projects set forth in the table below.
Project Facility
Resource
Approximate Nameplate Capacity ( MW )
 
Location
Ownership Percentage
Actual / Expected COD
PPA Counterparties
PPA Contract Period
Construction Projects Completed During the Year Ended December 31, 2018
Cactus Flats (a)
Wind
148
 
Concho County, TX
100% of Class B
 
July 2018
General Motors, LLC and General Mills Operations, LLC
12 years and 15 years
Projects Under Construction at December 31, 2018
Mankato expansion (b)
Natural Gas
385
 
Mankato, MN
100
%
 
Second quarter 2019
Northern States Power Company
20 years
Wild Horse Mountain (c)
Wind
100
 
Pushmataha County, OK
100
%
 
Fourth quarter 2019
Arkansas Electric Cooperative
20 years
Reading (d)
Wind
200
 
Osage and Lyon Counties, KS
100
%
 
Second quarter 2020
Royal Caribbean Cruises LTD
12 years
(a)
In July 2017, Southern Power purchased 100% of the Cactus Flats facility. In August 2018, Southern Power closed on a tax equity partnership and now owns 100% of the class B membership interests.
(b)
In November 2018, Southern Power entered into an agreement to sell all of its equity interests in Plant Mankato, including this expansion currently under construction. See "Sales of Natural Gas Plants" below.

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(c)
In May 2018, Southern Power purchased 100% of the Wild Horse Mountain facility. Southern Power may enter into a tax equity partnership, in which case it would then own 100% of the class B membership interests. The ultimate outcome of this matter cannot be determined at this time.
(d)
In August 2018, Southern Power purchased 100% of the membership interests of the Reading facility from the joint development arrangement with Renewable Energy Systems Americas, Inc. described below. Southern Power may enter into a tax equity partnership, in which case it would then own 100% of the class B membership interests. The ultimate outcome of this matter cannot be determined at this time.
Total aggregate construction costs for projects under construction at December 31, 2018, excluding acquisition costs, are expected to be between $575 million and $640 million for the Plant Mankato expansion, Wild Horse Mountain, and Reading facilities. A t December 31, 2018 , total costs of construction incurred for these projects was $289 million , and is included in CWIP, except for the Plant Mankato expansion, which is included in assets held for sale in the financial statements. See Note 15 to the financial statements under "Southern Power" and "Assets Held for Sale" for additional information.
Development Projects
During 2017, Southern Power purchased wind turbine equipment to be used for various development and construction projects. Any wind projects using this equipment and reaching commercial operation by the end of 2021 are expected to qualify for 80% PTCs.
During 2016, Southern Power entered into a joint development agreement with Renewable Energy Systems Americas, Inc. (RES) to develop and construct wind projects. Concurrent with the agreement, Southern Power purchased wind turbine equipment from Siemens Wind Power, Inc. and Vestas-American Wind Technology, Inc. to be used for construction of these projects. Several wind projects using this equipment, as well as other purchased equipment, have successfully originated, directly or indirectly, from the partnership with RES and are expected to reach commercial operation before the end of 2020, thus qualifying for 100% PTCs.
Southern Power continues to evaluate and refine the deployment of the wind turbine equipment to potential joint development and construction projects as well as the amount of MW capacity to be constructed. During the third quarter 2018, as a result of a review of various options for probable dispositions of wind turbine equipment not deployed to development or construction projects, Southern Power recorded a $36 million asset impairment charge on the equipment.
Subsequent to December 31, 2018 and as part of management's continuous review of disposition options, approximately $53 million of this equipment is being marketed for sale and will be classified as held for sale.
The ultimate outcome of these matters cannot be determined at this time.
Sales of Renewable Facility Interests
On May 22, 2018, Southern Power completed the sale of a noncontrolling 33% equity interest in SP Solar, a limited partnership indirectly owning substantially all of Southern Power's solar facilities, to Global Atlantic for approximately $1.2 billion. Since Southern Power retains control of the limited partnership through its wholly-owned general partner, the sale was recorded as an equity transaction and Southern Power will continue to consolidate SP Solar in its financial statements. On the date of the transaction, the noncontrolling interest was increased by $511 million to reflect 33% of the carrying value of the partnership. This difference, partially offset by the tax impact and other related transaction charges, also resulted in a $410 million decrease to Southern Power's common stockholder's equity.
On December 11, 2018, Southern Power completed the sale of a noncontrolling tax equity interest in SP Wind, which owns a portfolio of eight operating wind facilities, to three financial investors for approximately $1.2 billion. The tax equity investors together will generally receive 40% of the cash distributions from available cash and will receive 99% of the tax attributes, including future production tax credits. Since Southern Power retains control of SP Wind, Southern Power will continue to consolidate SP Wind in its financial statements.
Sales of Natural Gas Plants
On December 4, 2018, Southern Power completed the sale of all of its equity interests in the Florida Plants to NextEra Energy for $203 million. In contemplation of this sale transaction, Southern Power recorded an asset impairment charge of approximately $119 million ($89 million after tax) in May 2018. Pre-tax net income for the Florida Plants was $49 million and $37 million for the period from January 1, 2018 to December 4, 2018 and for the year ended December 31, 2017, respectively.
On November 5, 2018, Southern Power entered into an agreement with Northern States Power to sell all of its equity interests in Plant Mankato (including the 385-MW expansion currently under construction) for an aggregate purchase price of approximately $650 million. The completion of the disposition is subject to the expansion unit reaching commercial operation as well as various other customary conditions to closing, including working capital and timing adjustments. The ultimate purchase price will decrease $66,667 per day for each day after June 1, 2019 that the expansion has not achieved commercial operation, not to exceed $15 million. Pre-tax net income for Plant Mankato was immaterial for the years ended December 31, 2018 and 2017. This

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transaction is subject to FERC and state commission approvals and is expected to close mid-2019. The assets and liabilities of Plant Mankato are classified as held for sale as of December 31, 2018.
See Note 15 to the financial statements under "Southern Power" and "Assets Held for Sale" for additional information. The ultimate outcome of this matter cannot be determined at this time.
Other Matters
Southern Power is involved in various other matters being litigated and regulatory matters that could affect future earnings. In addition, Southern Power is subject to certain claims and legal actions arising in the ordinary course of business. Southern Power's business activities are subject to extensive governmental regulation related to public health and the environment, such as laws and regulations governing air, water, land, and protection of other natural resources. Litigation over environmental issues and claims of various types, including property damage, personal injury, common law nuisance, and citizen enforcement of environmental laws and regulations, has occurred throughout the U.S. This litigation has included claims for damages alleged to have been caused by CO 2 and other emissions and alleged exposure to hazardous materials, and/or requests for injunctive relief in connection with such matters.
The ultimate outcome of such pending or potential litigation or regulatory matters cannot be predicted at this time; however, for current proceedings not specifically reported in Note 3 to the financial statements herein, management does not anticipate that the ultimate liabilities, if any, arising from such current proceedings would have a material effect on Southern Power's financial statements.
Southern Power indirectly owns a 51% membership interest in RE Roserock LLC (Roserock), the owner of the Roserock facility in Pecos County, Texas. Prior to the facility being placed in service in 2016, certain solar panels were damaged during installation by the construction contractor, McCarthy Building Companies, Inc. (McCarthy), and certain solar panels were damaged by a hail event that also occurred during construction. In connection therewith, Southern Power is withholding payments of approximately $26 million from the construction contractor, which has placed a lien on the Roserock facility for the same amount. In May 2017, Roserock filed a lawsuit in the state district court in Pecos County, Texas, (State Court lawsuit) against XL Insurance America, Inc. (XL) and North American Elite Insurance Company (North American Elite) seeking recovery from an insurance policy for damages resulting from the hail storm and McCarthy's installation practices. On June 1, 2018, the court in the State Court lawsuit granted Roserock's motion for partial summary judgment, finding that the insurers were in breach of contract and in violation of the Texas Insurance Code for failing to pay any monies owed for the hail claim. In addition to the State Court lawsuit, lawsuits were filed between Roserock and McCarthy, as well as other parties, and that litigation has been consolidated in the U.S. District Court for the Western District of Texas. Southern Power intends to vigorously pursue and defend these matters, the ultimate outcome of which cannot be determined at this time.
ACCOUNTING POLICIES
Application of Critical Accounting Policies and Estimates
Southern Power prepares its consolidated financial statements in accordance with GAAP. Significant accounting policies are described in Notes 1 , 4, and 10 to the financial statements. In the application of these policies, certain estimates are made that may have a material impact on Southern Power's results of operations and related disclosures. Different assumptions and measurements could produce estimates that are significantly different from those recorded in the financial statements. Senior management has reviewed and discussed the following critical accounting policies and estimates with the Audit Committee of Southern Company's Board of Directors.
Revenue Recognition
Southern Power's revenue recognition depends on appropriate classification and documentation of transactions in accordance with GAAP. In general, Southern Power's power sale transactions, which include PPAs, can be classified in one of four categories: leases, non-derivatives or normal sale derivatives, derivatives designated as cash flow hedges, and derivatives not designated as hedges. For more information on derivative transactions, see FINANCIAL CONDITION AND LIQUIDITY – "Market Price Risk" herein and Notes 1 and 14 to the financial statements. Southern Power's revenues are dependent upon significant judgments used to determine the appropriate transaction classification, which must be documented upon the inception of each contract.
Lease Transactions
Southern Power considers the following factors to determine whether the sales contract is a lease:
Assessing whether specific property is explicitly or implicitly identified in the agreement;

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Determining whether the fulfillment of the arrangement is dependent on the use of the identified property; and
Assessing whether the arrangement conveys to the purchaser the right to use the identified property.
If the contract meets the above criteria for a lease, Southern Power performs further analysis as to whether the lease is classified as operating, financing, or sales-type. All of Southern Power's power sales contracts that are determined to be leases are accounted for as operating leases and the capacity revenue is recognized on a straight-line basis over the term of the contract and is included in Southern Power's operating revenues. Energy revenues and other contingent revenues are recognized in the period the energy is delivered or the service is rendered.
Non-Derivative and Normal Sale Derivative Transactions
If the power sales contract is not classified as a lease, Southern Power further considers the following factors to determine proper classification:
Assessing whether the contract meets the definition of a derivative;
Assessing whether the contract meets the definition of a capacity contract;
Assessing the probability at inception and throughout the term of the individual contract that the contract will result in physical delivery; and
Ensuring that the contract quantities do not exceed available generating capacity (including purchased capacity).
Contracts that do not meet the definition of a derivative or are designated as normal sales (i.e. capacity contracts which provide for the sale of electricity that involve physical delivery in quantities within Southern Power's available generating capacity) are accounted for as executory contracts. For contracts that have a capacity charge, the revenue is generally recognized in the period that it becomes billable. Revenues related to energy and ancillary services are recognized in the period the energy is delivered or the service is rendered. See Note 4 to the financial statements for additional information.
Cash Flow Hedge Transactions
Southern Power further considers the following in designating other derivative contracts for the sale of electricity as cash flow hedges of anticipated sale transactions:
Identifying the hedging instrument, the forecasted hedged transaction, and the nature of the risk being hedged; and
Assessing hedge effectiveness at inception and throughout the contract term.
These contracts are accounted for on a fair value basis and are recorded in AOCI over the life of the contract. Realized gains and losses are then recognized in operating revenues as incurred.
Derivative (Non-Hedge) Transactions
Contracts for sales of electricity, which meet the definition of a derivative and that either do not qualify or are not designated as normal sales or as cash flow hedges, are accounted for on a fair value basis and are recorded in operating revenues.
Impairment of Long-Lived Assets and Intangibles
Southern Power's investments in long-lived assets are primarily generation assets, whether in service or under construction. Southern Power's intangible assets arise from certain acquisitions and consist of acquired PPAs, which are amortized to revenue over the term of the respective PPAs. Southern Power evaluates the carrying value of these assets whenever indicators of potential impairment exist. Examples of impairment indicators could include significant changes in construction schedules, current period losses combined with a history of losses or a projection of continuing losses, a significant decrease in market prices, the inability to remarket generating capacity for an extended period, the unplanned termination of a customer contract or inability of a customer to perform under the terms of the contract, or the inability to deploy wind turbine equipment to a development project. If an indicator exists, the asset is tested for recoverability by comparing the asset carrying value to the sum of the undiscounted expected future cash flows directly attributable to the asset. If the estimate of undiscounted future cash flows is less than the carrying value of the asset, the fair value of the asset is determined and a loss is recorded. A high degree of judgment is required in developing estimates related to these evaluations, which are based on projections of various factors, including the following:
Future demand for electricity based on projections of economic growth and estimates of available generating capacity;
Future power and natural gas prices, which have been quite volatile in recent years; and
Future operating costs.

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In addition, when assets are identified as held for sale, an impairment loss is recognized to the extent that the carrying value of the assets or asset group exceeds the asset fair value less cost to sell. In 2018, an impairment charge of $119 million was recorded for the Florida Plants concurrent with the assets being identified as held for sale as a result of a signed purchase and sale agreement. Also in 2018, an impairment charge of $36 million was recorded for wind turbine equipment that is no longer likely to be deployed to a wind generation project.
Acquisition Accounting
Southern Power may acquire generation assets as part of its overall growth strategy. At the time of an acquisition, Southern Power will assess if these assets and activities meet the definition of a business. For acquisitions that meet the definition of a business, Southern Power includes operating results from the date of acquisition in its consolidated financial statements. The purchase price, including any contingent consideration, is allocated based on the fair value of the identifiable assets acquired and liabilities assumed (including any intangible assets). Assets acquired that do not meet the definition of a business are accounted for as an asset acquisition.
The purchase price of each asset acquisition is allocated based on the relative fair value of assets acquired. Determining the fair value of assets acquired and liabilities assumed requires management judgment and Southern Power may engage independent valuation experts to assist in this process. Fair values are determined by using market participant assumptions, and typically include the timing and amounts of future cash flows, incurred construction costs, the nature of acquired contracts, discount rates, power market prices, and expected asset lives. Any due diligence or transition costs incurred by Southern Power for potential or successful acquisitions are expensed as incurred.
Contingent consideration primarily relates to fixed amounts due to the seller once the facility is placed in service. For contingent consideration with variable payments, Southern Power fair values the arrangement with any changes recorded in the consolidated statements of income. See Note 13 to the financial statements for additional fair value information and Note 15 to the financial statements for additional information on recent acquisitions.
Accounting for Income Taxes
The consolidated income tax provision and deferred income tax assets and liabilities, as well as any unrecognized tax benefits and valuation allowances, require significant judgment and estimates. These estimates are supported by historical tax return data, reasonable projections of taxable income, and interpretations of applicable tax laws and regulations across multiple taxing jurisdictions. The effective tax rate reflects the statutory tax rates and calculated apportionments for the various states in which Southern Power operates.
On behalf of Southern Power, Southern Company files a consolidated federal income tax return and various state income tax returns, some of which are combined or unitary. Under a joint consolidated income tax allocation agreement, each Southern Company subsidiary's current and deferred tax expense is computed on a stand-alone basis and no subsidiary is allocated more current expense than would be paid if it filed a separate income tax return. Certain deductions and credits can be limited at the consolidated or combined level resulting in NOL and tax credit carryforwards that would not otherwise result on a stand-alone basis. Utilization of NOL and tax credit carryforwards and the assessment of valuation allowances are based on significant judgment and extensive analysis of Southern Power's, as well as Southern Company's, current financial position and results of operations, including currently available information about future years, to estimate when future taxable income will be realized.
Current and deferred state income tax liabilities and assets are estimated based on laws of multiple states that determine the income to be apportioned to their jurisdictions. States utilize various formulas to calculate the apportionment of taxable income, primarily using sales, assets, or payroll within the jurisdiction compared to the consolidated totals. In addition, each state varies as to whether a stand-alone, combined, or unitary filing methodology is required. The calculation of deferred state taxes considers apportionment factors and filing methodologies that are expected to apply in future years. The apportionments and methodologies which are ultimately finalized in a manner inconsistent with expectations could have a material effect on Southern Power's financial statements.
Given the significant judgment involved in estimating NOL and tax credit carryforwards and multi-state apportionments for all subsidiaries, Southern Power considers federal and state deferred income tax liabilities and assets to be critical accounting estimates.
Recently Issued Accounting Standards
See Note 1 to the financial statements under " Recently Adopted Accounting Standards " for additional information.
In 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 requires lessees to recognize on the balance sheet a lease liability and a right-of-use asset for all leases. ASU 2016-02 also changes the recognition, measurement,

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and presentation of expense associated with leases and provides clarification regarding the identification of certain components of contracts that would represent a lease. The accounting required by lessors is relatively unchanged . ASU 2016-02 is effective for fiscal years beginning after December 15, 2018 and Southern Power adopted the new standard effective January 1, 2019.
Southern Power elected the transition methodology provided by ASU No. 2018-11, Leases (Topic 842): Targeted Improvements , whereby the requirements of ASU 2016-02 are applied on a prospective basis as of the adoption date of January 1, 2019, without restating prior periods. Southern Power elected the package of practical expedients provided by ASU 2016-02 that allows prior determinations of whether existing contracts are, or contain, leases and the classification of existing leases to continue without reassessment. Additionally, Southern Power expects to apply the use-of-hindsight practical expedient in determining lease terms as of the date of adoption. Southern Power also made accounting policy elections to account for short-term leases in all asset classes as off-balance sheet leases and combined lessee lease and non-lease components in the computations of lease obligations and right-of-use assets for most asset classes, while lessor lease and non-lease components are accounted for separately.
Southern Power completed the implementation of a new application to track and account for its leases and updated its internal controls and accounting policies to support the accounting for leases under ASU 2016-02. Southern Power completed its lease inventory and determined its most significant leases as a lessee involve real estate. In the first quarter 2019, the adoption of ASU 2016-02 resulted in recording lease liabilities and right-of-use assets on Southern Power's balance sheet each totaling approximately $0.4 billion , with no impact on Southern Power's statement of income.
FINANCIAL CONDITION AND LIQUIDITY
Overview
Southern Power's financial condition remained stable at December 31, 2018 . Southern Power's cash requirements primarily consist of funding ongoing business operations, common stock dividends, distributions to noncontrolling interests, capital expenditures, and debt maturities. Capital expenditures and other investing activities may include investments in acquisitions or new construction associated with Southern Power's overall growth strategy and to maintain the existing generation fleet's performance. Operating cash flows, which may include the utilization of tax credits, will only provide a portion of Southern Power's cash needs. For the three-year period from 2019 through 2021, Southern Power's projected common stock dividends, distributions to noncontrolling interests, capital expenditures, and debt maturities are expected to exceed operating cash flows. Southern Power plans to finance future cash needs in excess of its operating cash flows primarily through external securities issuances, borrowings from financial institutions, and equity contributions from Southern Company. Southern Power intends to continue to monitor its access to short-term and long-term capital markets as well as its bank credit agreements to meet future capital and liquidity needs. See "Sources of Capital," "Financing Activities," and "Contractual Obligations" herein for additional information on lines of credit.
Southern Power also utilizes tax equity partnerships, as one of its financing sources, where the tax partner takes significantly all of the federal tax benefits. These tax equity partnerships are consolidated in Southern Power's financial statements and are accounted for using a HLBV methodology to allocate partnership gains and losses. During 2018, Southern Power obtained tax equity funding for the Gaskell West 1 solar project, the Cactus Flats wind project, and the SP Wind portfolio and received proceeds of approximately $26 million, $122 million, and $1.2 billion, respectively.
On May 22, 2018, Southern Power completed the sale of a noncontrolling 33% equity interest in SP Solar, a limited partnership indirectly owning substantially all of Southern Power's solar facilities, to Global Atlantic for approximately $1.2 billion. Accordingly, Global Atlantic will receive 33% of all cash distributions paid by SP Solar.
On December 4, 2018, Southern Power completed the sale of all of its equity interests in the Florida Plants to NextEra Energy for $203 million. On November 5, 2018, Southern Power entered into an agreement with Northern States Power to sell all of its equity interests in Plant Mankato (including the 385-MW expansion currently under construction) for an aggregate purchase price of approximately $650 million. The completion of the disposition is subject to the expansion unit reaching commercial operation as well as various other customary conditions to closing, and is expected to close mid-2019. The ultimate outcome of this matter cannot be determined at this time.
Net cash provided from operating activities totaled $631 million in 2018 , a decrease of $524 million compared to 2017 . The decrease was primarily due to lower income tax refunds as a result of taxable gains arising from the sales of noncontrolling interests in SP Solar and SP Wind, as well as the sale of the Florida Plants. At December 31, 2018 , Southern Power had $2.1 billion of unutilized ITCs and PTCs which are expected to be fully utilized by 2022. See FUTURE EARNINGS POTENTIAL – "Income Tax Matters – Tax Credits" herein for additional information. Net cash provided from operating activities totaled $1.2 billion in 2017 , an increase of $816 million compared to 2016 primarily due to income tax refunds received and an increase in energy sales from new solar and wind facilities, partially offset by an increase in interest paid.

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Net cash used for investing activities totaled $227 million , $1.6 billion , and $4.8 billion in 2018 , 2017 , and 2016 , respectively, and decreased in 2018 primarily due to fewer acquisitions and completion of construction of renewable facilities during 2017 and 2018. See FUTURE EARNINGS POTENTIAL – "Acquisitions" and "Construction Projects" herein and Note 15 to the financial statements for additional information.
Net cash used for financing activities totaled $363 million in 2018 primarily due to returns of capital to Southern Company, payments of common stock dividends, and distributions to noncontrolling interests, partially offset by capital contributions from noncontrolling interests. Net cash used for financing activities totaled $502 million in 2017 primarily due to payments of common stock dividends and distributions to noncontrolling interests. Net cash provided from financing activities totaled $4.7 billion in 2016 primarily due to the issuance of additional senior notes and capital contributions from Southern Company and noncontrolling interests.
Significant balance sheet changes include a $745 million decrease in plant in service and a $576 million increase in assets held for sale primarily due to completed and planned plant divestitures and a $355 million increase in deferred income taxes primarily due to $551 million related to the sales of noncontrolling interests in SP Solar and SP Wind and $129 million in additional unutilized PTCs, partially offset by a $333 million decrease in the federal NOL carryforward.
Sources of Capital
Southern Power plans to obtain the funds required for acquisitions, construction, development, debt maturities, and other purposes from operating cash flows, external securities issuances, borrowings from financial institutions, tax equity partnership contributions, divestitures, and equity contributions from Southern Company. However, the amount, type, and timing of any future financings, if needed, will depend upon prevailing market conditions, regulatory approval, and other factors. With respect to the public offering of securities, Southern Power (excluding its subsidiaries) issues and offers debt registered on registration statements filed with the SEC under the Securities Act of 1933, as amended.
Southern Power's current liabilities sometimes exceed current assets due to the use of short-term debt as a funding source and construction payables, as well as fluctuations in cash needs due to seasonality. Southern Power believes the need for working capital can be adequately met by utilizing the commercial paper program, the Facility (as defined below), borrowings from financial institutions, equity contributions from Southern Company, external securities issuances, and operating cash flows.
Southern Power obtains its own financing separately without any credit support from Southern Company or any other affiliate. The Southern Company system does not maintain a centralized cash or money pool. Therefore, funds of Southern Power are not commingled with funds of any other company in the Southern Company system. To meet liquidity and capital resource requirements, Southern Power had cash and cash equivalents of approximately $181 million at December 31, 2018 .
Southern Power's commercial paper program is used to finance acquisition and construction costs related to electric generating facilities and for general corporate purposes, including maturing debt. Southern Power's subsidiaries are not issuers under the commercial paper program. Short-term borrowings are included in notes payable on the consolidated balance sheets.

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Details of short-term borrowings were as follows:
 
Short-term Borrowings at the
End of the Period
 
Short-term Borrowings During the Period (*)
 
Amount Outstanding
 
Weighted Average Interest Rate
 
Average Amount Outstanding
 
Weighted Average Interest Rate
 
Maximum Amount Outstanding
 
(in millions)
 
 
 
(in millions)
 
 
 
(in millions)
December 31, 2018
 
 
 
 
 
 
 
 
 
Commercial paper
$

 
—%
 
$
77

 
2.2%
 
$
304

Short-term bank debt
100

 
3.1%
 
111

 
2.7%
 
200

Total
$
100

 
3.1%
 
$
188

 
2.5%
 
 
December 31, 2017
 
 
 
 
 
 
 
 
 
Commercial paper
$
105

 
2.0%
 
$
215

 
1.4%
 
$
419

Short-term bank debt

 
—%
 
17

 
2.1%
 
209

Total
$
105

 
2.0%
 
$
232

 
1.4%
 
 
December 31, 2016
 
 
 
 
 
 
 
 
 
Commercial paper
$

 
—%
 
$
56

 
0.8%
 
$
310

Total
$

 
—%
 
$
56

 
0.8%
 
 
(*)
Average and maximum amounts are based upon daily balances during the twelve-month periods ended December 31, 2018 , 2017 , and 2016 .
In addition to the short-term borrowings of Southern Power included in the table above, at December 31, 2016, Southern Power subsidiaries assumed credit agreements (Project Credit Facilities) with the acquisition of certain solar facilities, which were non-recourse to the Southern Power parent company, the proceeds of which were used to finance project costs related to such solar facilities. The Project Credit Facilities were fully repaid in January 2017. For the year ended December 31, 2016, the Project Credit Facilities had a maximum amount outstanding of $828 million and an average amount outstanding of $566 million at a weighted average interest rate of 2.1% and had total amounts outstanding of $209 million at a weighted average interest rate of 2.1% at December 31, 2016.
Company Credit Facilities
At December 31, 2018 , Southern Power had a committed credit facility (Facility) of $ 750 million expiring in 2022, of which $ 23 million has been used for letters of credit and $ 727 million remains unused. Southern Power's subsidiaries are not borrowers under the Facility. Proceeds from the Facility may be used for working capital and general corporate purposes as well as liquidity support for Southern Power's commercial paper program. A portion of the unused credit under the Facility is allocated to provide liquidity support for Southern Power's commercial paper program. Subject to applicable market conditions, Southern Power expects to renew or replace the Facility, as needed, prior to expiration. In connection therewith, Southern Power may extend the maturity date and/or increase or decrease the lending commitment thereunder. See Note 8 to the financial statements under " Bank Credit Arrangements " for additional information.
The Facility, as well as Southern Power's term loan agreements, contains a covenant that limits the ratio of debt to capitalization (as defined in the Facility) to a maximum of 65% and contains a cross-default provision that is restricted only to indebtedness of Southern Power. For the purposes of this definition, debt would exclude any project debt incurred by certain subsidiaries of Southern Power to the extent such debt is non-recourse to Southern Power, and capitalization would exclude the capital stock or other equity attributable to such subsidiary. Southern Power is currently in compliance with all of these covenants.
Southern Power also has a $120 million continuing letter of credit facility for standby letters of credit. In December 2018, Southern Power amended the letter of credit facility, which, among other things, extended the expiration date from 2019 to 2021. At December 31, 2018, $103 million has been used for letters of credit, primarily as credit support for PPA requirements, and $17 million was unused. Southern Power's subsidiaries are not parties to this letter of credit facility.
In addition, at December 31, 2018 and 2017, Southern Power had $103 million and $113 million , respectively, of cash collateral posted related to PPA requirements.

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Financing Activities
Senior Notes
In June 2018, Southern Power repaid $350 million aggregate principal amount of Series 2015A 1.50% Senior Notes due June 1, 2018.
In addition to any financings that may be necessary to meet capital requirements and contractual obligations, Southern Power plans to continue, when economically feasible, a program to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit.
Other Debt
In May 2018, Southern Power repaid $420 million aggregate principal amount of long-term floating rate bank loans.
Also in May 2018, Southern Power entered into two short-term floating rate bank loans, each for an aggregate principal amount of $100 million, which bear interest based on one-month LIBOR, and proceeds being used for general corporate purposes. In November 2018, Southern Power repaid one of these short-term loans.
Credit Rating Risk
Southern Power does not have any credit arrangements that would require material changes in payment schedules or terminations as a result of a credit rating downgrade.
There are certain contracts that could require collateral, but not accelerated payment, in the event of a credit rating change to BBB and/or Baa2 or below. These contracts are for physical electricity purchases and sales, fuel transportation and storage, energy price risk management, and transmission.
The maximum potential collateral requirements under these contracts at December 31, 2018 were as follows:
Credit Ratings
Maximum Potential Collateral Requirements
 
(in millions)
At BBB and/or Baa2
$
29

At BBB- and/or Baa3
$
338

At BB+ and/or Ba1   (*)
$
980

(*)
Any additional credit rating downgrades at or below BB- and/or Ba3 could increase collateral requirements up to an additional $38 million .
Included in these amounts are certain agreements that could require collateral in the event that either Alabama Power or Georgia Power (affiliate companies of Southern Power) has a credit rating change to below investment grade. Generally, collateral may be provided by a Southern Company guaranty, letter of credit, or cash. Additionally, a credit rating downgrade could impact the ability of Southern Power to access capital markets and would be likely to impact the cost at which it does so.
In addition, Southern Power has a PPA that could require collateral, but not accelerated payment, in the event of a downgrade of Southern Power's credit. The PPA requires credit assurances without stating a specific credit rating. The amount of collateral required would depend upon actual losses resulting from a credit downgrade.
On September 28, 2018, Fitch assigned a negative rating outlook to the ratings of Southern Company and certain of its subsidiaries (including Southern Power).
Market Price Risk
Southern Power is exposed to market risks, primarily commodity price risk, interest rate risk, and occasionally foreign currency exchange rate risk. To manage the volatility attributable to these exposures, Southern Power nets its exposures, where possible, to take advantage of natural offsets and enters into various derivative transactions for the remaining exposures pursuant to Southern Power's policies in areas such as counterparty exposure and risk management practices. Southern Power's policy is that derivatives are to be used primarily for hedging purposes and mandates strict adherence to all applicable risk management policies. Derivative positions are monitored using techniques including, but not limited to, market valuation, value at risk, stress testing, and sensitivity analysis. Derivative instruments are recognized at fair value in the consolidated balance sheets as either assets or liabilities and are presented on a gross basis. In the statements of cash flows, the cash impacts of settled energy-related and interest rate derivatives are recorded as operating activities.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Power Company and Subsidiary Companies 2018 Annual Report

At December 31, 2018 , Southern Power had $525 million of long-term variable rate notes outstanding. If Southern Power sustained a 100 basis point change in interest rates for its variable interest rate exposure, the change would affect annualized interest expense by approximately $5 million at December 31, 2018. Since a significant portion of outstanding indebtedness bears interest at fixed rates, Southern Power is not aware of any facts or circumstances that would significantly affect exposure on existing indebtedness in the near term. However, the impact on future financing costs cannot be determined at this time.
Southern Power had foreign currency denominated debt of €1.1 billion at December 31, 2018. Southern Power has mitigated its exposure to foreign currency exchange rate risk through the use of foreign currency swaps converting all interest and principal payments to fixed-rate U.S. dollars.
Because energy from Southern Power's facilities is primarily sold under long-term PPAs with tolling agreements and provisions shifting substantially all of the responsibility for fuel cost to the counterparties, Southern Power's exposure to market volatility in commodity fuel prices and prices of electricity is generally limited. However, Southern Power has been and may continue to be exposed to market volatility in energy-related commodity prices as a result of uncontracted generating capacity.
For the years ended December 31, 2018 and 2017, the changes in fair value of energy-related derivative contracts associated with both power and natural gas positions were as follows:
 
2018
2017
 
(in millions)
Contracts outstanding at the beginning of period, assets (liabilities), net
$
(10
)
$
16

Contracts realized or settled
10

(17
)
Current period changes  (*)
(4
)
(9
)
Contracts outstanding at the end of period, assets (liabilities), net
$
(4
)
$
(10
)
(*)
Current period changes also include changes in the fair value of new contracts entered into during the period, if any.
For the years ending December 31, 2018 and 2017, the changes in contracts outstanding were attributable to both the volume and the prices of power and natural gas as follows:
 
2018
2017
Power – net sold
 
 
MWH (in millions)
2.5

3.0

Weighted average contract cost per MWH above (below) market prices (in dollars)
$
(0.23
)
$
(2.67
)
Natural Gas – net purchased
 
 
Commodity - mmBtu (in millions)
15.0

14.4

Commodity - weighted average contract cost per mmBtu above (below) market prices (in dollars)
$
0.22

$
0.12

Gains and losses on energy-related derivatives designated as cash flow hedges which are used by Southern Power to hedge anticipated purchases and sales are initially deferred in OCI before being recognized in income in the same period as the hedged transactions are reflected in earnings. Gains and losses on energy-related derivative contracts that are not designated or fail to qualify as hedges are recognized in the consolidated statements of income as incurred.
Southern Power uses over-the-counter contracts that are not exchange traded but are fair valued using prices which are market observable, and thus fall into Level 2 of the fair value hierarchy. See Note 13 to the financial statements for further discussion of fair value measurements. The energy-related derivative contracts outstanding at December 31, 2018 mature through 2020.
Southern Power is exposed to losses related to financial instruments in the event of counterparties' nonperformance. Southern Power only enters into agreements and material transactions with counterparties that have investment grade credit ratings by S&P and Moody's or with counterparties who have posted collateral to cover potential credit exposure. Southern Power has also established risk management policies and controls to determine and monitor the creditworthiness of counterparties in order to mitigate Southern Power's exposure to counterparty credit risk. Therefore, Southern Power does not anticipate a material adverse effect on the financial statements as a result of counterparty nonperformance. See Note 1 to the financial statements under "Financial Instruments" and Note 14 to the financial statements for additional information.
Capital Requirements and Contractual Obligations
The capital program of Southern Power is subject to periodic review and revision and is currently estimated to total $0.9 billion over the next five years through 2023. This includes committed construction, capital improvements, and work to be performed

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Southern Power Company and Subsidiary Companies 2018 Annual Report

under LTSAs, totaling approximately $300 million for each of 2019 and 2020 and an average of approximately $100 million each year from 2021 through 2023. In addition, Southern Power has a further $2.3 billion in planned expenditures for plant acquisitions and placeholder growth, or approximately $0.5 billion per year on average for 2019 through 2023. Planned expenditures for plant acquisitions and placeholder growth may vary materially due to market opportunities and Southern Power's ability to execute its growth strategy. Actual construction costs may vary from these estimates because of numerous factors such as: changes in business conditions; changes in the expected environmental compliance program; changes in environmental laws and regulations; the outcome of any legal challenges to environmental rules; changes in FERC rules and regulations; changes in load projections; changes in legislation; the cost and efficiency of construction labor, equipment, and materials; project scope and design changes; and the cost of capital. See Note 15 to the financial statements under " Southern Power " for additional information.
Southern Power forecasts contributions to the pension and other postretirement benefit plans over a three-year period. Southern Power anticipates no mandatory contributions to the qualified pension plan during the next three years. See Note 11 to the financial statements for additional information.
Funding requirements related to obligations associated with scheduled maturities of long-term debt, as well as the related interest, leases, derivative obligations, and other purchase commitments are detailed in the contractual obligations table that follows. See Notes 1 , 8 , 9 , and 14 to the financial statements for additional information.
Contractual Obligations
Contractual obligations at December 31, 2018 were as follows:
 
2019
 
2020-
2021
 
2022-
2023
 
After
2023
 
Total
 
(in millions)
Long-term debt (a)  —
 
 
 
 
 
 
 
 
 
Principal
$
600

 
$
1,125

 
$
967

 
$
2,339

 
$
5,031

Interest
179

 
310

 
250

 
1,409

 
2,148

Financial derivative obligations (b)
6

 
2

 

 

 
8

Operating leases (c)
23

 
48

 
50

 
874

 
995

Purchase commitments —
 
 
 
 
 
 
 
 
 
Capital (d)
252

 
461

 
144

 

 
857

Fuel (e)
601

 
744

 
369

 
32

 
1,746

Purchased power (f)
41

 
83

 

 

 
124

Other (g)
168

 
309

 
221

 
1,471

 
2,169

Total
$
1,870

 
$
3,082

 
$
2,001

 
$
6,125

 
$
13,078

(a)
All amounts are reflected based on final maturity dates and include the effects of interest rate derivatives employed to manage interest rate risk and effects of foreign currency swaps employed to manage foreign currency exchange rate risk. Included in debt principal is an $18 million gain related to the foreign currency hedge of €1.1 billion. Southern Power plans to continue, when economically feasible, to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit.
(b)
For additional information, see Notes 1 and 14 to the financial statements.
(c)
Operating lease commitments include certain land leases for solar and wind facilities that may be subject to annual price escalation based on indices. See Note 9 to the financial statements for additional information.
(d)
Southern Power provides estimated capital expenditures for a five-year period, including capital expenditures associated with environmental regulations. Excluded from these amounts are planned expenditures for plant acquisitions and placeholder growth of $2.3 billion. Also excluded from these amounts are capital expenditures covered under LTSAs which are reflected in "Other." See Note (g) below. At December 31, 2018, significant purchase commitments were outstanding in connection with the construction program. No ARO settlements are projected during the five-year period.
(e)
Primarily includes commitments to purchase, transport, and store natural gas. Amounts reflected are based on contracted cost and may contain provisions for price escalation. Amounts reflected for natural gas purchase commitments are based on various indices at the time of delivery and have been estimated based on the NYMEX future prices at December 31, 2018 .
(f)
Purchased power commitments will be resold under a third party agreement at cost.
(g)
Includes commitments related to LTSAs, operation and maintenance agreements, and transmission. LTSAs include price escalation based on inflation indices. Transmission commitments are based on the Southern Company system's current tariff rate for point-to-point transmission.

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MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
Southern Company Gas and Subsidiary Companies 2018 Annual Report


OVERVIEW
Business Activities
Southern Company Gas is an energy services holding company whose primary business is the distribution of natural gas. Subsequent to the dispositions of Elizabethtown Gas, Elkton Gas, and Florida City Gas discussed herein under " Merger, Acquisition, and Disposition Activities ," Southern Company Gas has natural gas distribution utilities in four states – Illinois, Georgia, Virginia, and Tennessee. Southern Company Gas is also involved in several other complementary businesses.
Southern Company Gas manages its business through four reportable segments – gas distribution operations, gas pipeline investments, wholesale gas services, which includes Sequent, a natural gas asset optimization company, and gas marketing services, which includes SouthStar, a provider of energy-related products and services to natural gas markets – and one non-reportable segment, all other. During the fourth quarter 2018, Southern Company Gas changed its reportable segments to further align with the way its new Chief Operating Decision Maker reviews operating results and has reclassified prior years' data to conform to the new reportable segment presentation. This change resulted in a new reportable segment, gas pipeline investments, which was formerly included in gas midstream operations. Gas pipeline investments consists primarily of joint ventures in natural gas pipeline investments including a 50% interest in SNG, two significant pipeline construction projects, and a 50% joint ownership interest in the Dalton Pipeline. Gas distribution operations, wholesale gas services, and gas marketing services continue to remain as separate reportable segments and reflect the impact of the Southern Company Gas Dispositions. The all other non-reportable segment includes segments below the quantitative threshold for separate disclosure, including the storage and fuels operations that were formerly included in gas midstream operations, and other subsidiaries that fall below the quantitative threshold for separate disclosure. See Notes 5 , 7 , and 16 to the financial statements for additional information.
Many factors affect the opportunities, challenges, and risks of Southern Company Gas' business. These factors include the ability to maintain safety, to maintain constructive regulatory environments, to maintain and grow natural gas sales and number of customers, and to effectively manage and secure timely recovery of costs. These costs include those related to projected long-term demand growth, environmental standards, safety, reliability, resilience, natural gas, and capital expenditures, including updating and expanding the natural gas distribution systems. The natural gas distribution utilities have various regulatory mechanisms that address cost recovery. Effectively operating pursuant to these regulatory mechanisms and appropriately balancing required costs and capital expenditures with customer prices will continue to challenge Southern Company Gas for the foreseeable future. Nicor Gas filed a rate case on November 9, 2018 and Atlanta Gas Light is required to file a rate case no later than June 1, 2019. These rate cases are both expected to conclude in 2019; however, the ultimate outcome of these matters cannot be determined at this time. See FUTURE EARNINGS POTENTIAL – " Regulatory Matters – Rate Proceedings" herein and Note 2 to the financial statements under " Southern Company Gas Rate Proceedings " for additional information.
Merger, Acquisition, and Disposition Activities
In 2016, Southern Company Gas completed the Merger, pursuant to which Southern Company Gas became a wholly-owned subsidiary of Southern Company. Southern Company accounted for the Merger using the acquisition method of accounting whereby the assets acquired and liabilities assumed were recognized at fair value as of the acquisition date. Pushdown accounting was applied to create a new cost basis for Southern Company Gas' assets, liabilities, and equity as of the acquisition date. Accordingly, the successor financial statements reflect the new basis of accounting, and successor and predecessor period financial results (separated by a heavy black line) are presented, but are not comparable. As a result of the application of acquisition accounting, certain discussions herein include disclosure of the predecessor and successor periods. See Note 15 to the financial statements under " Southern Company Merger with Southern Company Gas " for additional information.
In 2016, Southern Company Gas completed its purchase of Piedmont's 15% interest in SouthStar for $160 million and paid $1.4 billion to acquire a 50% equity interest in SNG, which is the owner of a 7,000 -mile pipeline system connecting natural gas supply basins in Texas, Louisiana, Mississippi, and Alabama to markets in Louisiana, Mississippi, Alabama, Florida, Georgia, South Carolina, and Tennessee. The investment in SNG is accounted for using the equity method. In March 2017, Southern Company Gas made an additional $50 million contribution to maintain its 50% equity interest in SNG. See Note 7 to the financial statements under " Southern Company Gas " and Note 15 to the financial statements under "Southern Company Gas – Investment in SNG" for additional information.
During 2018, Southern Company Gas completed the following sales, resulting in approximately $2.7 billion in aggregate proceeds:
On June 4, 2018, Southern Company Gas completed the stock sale of Pivotal Home Solutions to American Water Enterprises LLC for a total cash purchase price of $365 million, which includes the final working capital adjustment.

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Southern Company Gas and Subsidiary Companies 2018 Annual Report


This disposition resulted in a net loss of $67 million, which includes $34 million of income tax expense. In contemplation of the transaction, a goodwill impairment charge of $42 million was recorded in 2018.
On July 1, 2018, a Southern Company Gas subsidiary, Pivotal Utility Holdings, completed the sales of the assets of two of its natural gas distribution utilities, Elizabethtown Gas and Elkton Gas, to South Jersey Industries, Inc. for a total cash purchase price of $1.7 billion, which includes the final working capital and other adjustments. This disposition resulted in a pre-tax gain that was entirely offset by $205 million of income tax expense, resulting in no material net income impact.
On July 29, 2018, Southern Company Gas and its wholly-owned direct subsidiary, NUI Corporation, completed the stock sale of Pivotal Utility Holdings, which primarily consisted of Florida City Gas, to NextEra Energy for a total cash purchase price of $587 million, which includes the final working capital adjustment less indebtedness assumed at closing. This disposition resulted in a net gain of $16 million, which includes $103 million of income tax expense.
The after-tax gain and loss on these dispositions included income tax expense on goodwill not deductible for tax purposes and for which a deferred tax liability had not been recorded previously. See Note 15 to the financial statements under "Southern Company Gas" herein for additional information.
Operating Metrics
Southern Company Gas continues to focus on several operating metrics, including Heating Degree Days, customer count, and volumes of natural gas sold.
Southern Company Gas measures weather and the effect on its business using Heating Degree Days. Generally, increased Heating Degree Days result in higher demand for natural gas on Southern Company Gas' distribution system. With the exception of Nicor Gas, Southern Company Gas has various regulatory mechanisms, such as weather normalization and straight-fixed-variable rate design, which limit its exposure to weather changes within typical ranges in each of its utilities' respective service territory. However, the operating revenues from utility customers in Illinois and gas marketing services customers primarily in Georgia and Illinois can be impacted by warmer- or colder-than-normal weather. Southern Company Gas utilizes weather hedges to limit the negative income impacts in the event of warmer-than-normal weather, while retaining a significant portion of the positive benefits of colder-than-normal weather for these businesses.
The number of customers served by gas distribution operations and gas marketing services can be impacted by natural gas prices, economic conditions, and competition from alternative fuels. Gas marketing services' customers are primarily located in Georgia and Illinois.
Southern Company Gas' natural gas volume metrics for gas distribution operations and gas marketing services illustrate the effects of weather and customer demand for natural gas. Wholesale gas services' physical sales volumes represent the daily average natural gas volumes sold to its customers.
See RESULTS OF OPERATIONS herein for additional information on these operating metrics.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2018 Annual Report


Seasonality of Results
During the Heating Season, natural gas usage and operating revenues are generally higher as more customers are connected to the gas distribution systems and natural gas usage is higher in periods of colder weather. Occasionally in the summer, wholesale gas services' operating revenues are impacted due to peak usage by power generators in response to summer energy demands. Southern Company Gas' base operating expenses, excluding cost of natural gas, bad debt expense, and certain incentive compensation costs, are incurred relatively evenly throughout the year. Seasonality also affects the comparison of certain balance sheet items across quarters, including receivables, unbilled revenues, natural gas for sale, and notes payable. However, these items are comparable when reviewing Southern Company Gas' annual results. Thus, Southern Company Gas' operating results can vary significantly from quarter to quarter as a result of seasonality, which is illustrated in the table below.
 
 
Percent Generated During Heating Season
 
 
Operating Revenues
 
Net Income
Successor - 2018
 
68.7
%
 
96.0
%
Successor - 2017
 
67.3
%
 
73.7
%
Successor - July 1, 2016 through December 31, 2016
 
67.1
%
 
96.5
%
Predecessor - January 1, 2016 through June 30, 2016
 
70.0
%
 
138.9
%
Earnings
Net income attributable to Southern Company Gas for the successor year ended December 31, 2018 was $372 million , representing a $129 million , or 53.1% , increase over the previous year. Excluding a $121 million decrease related to the Southern Company Gas Dispositions, net income attributable to Southern Company Gas increased $251 million. This increase was primarily due to lower income tax expense, increased commercial activity at wholesale gas services, increased operating revenues from infrastructure replacement programs and base rate changes at gas distribution operations, and higher earnings from Southern Company Gas' investment in SNG. These increases were partially offset by higher other operations and maintenance expenses primarily due to increased compensation and benefit costs and disposition-related costs, higher depreciation on continued infrastructure investments at gas distribution operations, additional interest expense on new debt issuances, and an increase in charitable donations.
Net income attributable to Southern Company Gas for the successor year ended December 31, 2017 was $243 million , which included net income of $53 million from Southern Company Gas' investment in SNG and $44 million generated from Southern Company Gas' continued investment in infrastructure replacement programs and base rate increases at Atlanta Gas Light, Elizabethtown Gas, and Virginia Natural Gas, less the associated increases in depreciation. Net income also reflects $130 million of additional tax expense resulting from the revaluation of deferred tax assets of $93 million related to the Tax Reform Legislation and $37 million associated with State of Illinois income tax legislation enacted in the third quarter 2017 and new income tax apportionment factors in several states resulting from Southern Company Gas' inclusion in the consolidated Southern Company state tax filings. Also included in net income was $17 million of additional expense resulting from the pushdown of acquisition accounting.
See FUTURE EARNINGS POTENTIAL – " Income Tax Matters " herein and Notes 10 and 15 to the financial statements for additional information.
Net income attributable to Southern Company Gas for the successor period of July 1, 2016 through December 31, 2016 was $114 million , which included $26 million in earnings from the SNG investment, net of related interest expense, partially offset by $12 million of additional expense resulting from the impact of the pushdown of acquisition accounting and $27 million of Merger-related expenses.
Net income attributable to Southern Company Gas for the predecessor period of January 1, 2016 through June 30, 2016 was $131 million , which included $41 million of Merger-related expenses and $14 million of net income attributable to the SouthStar noncontrolling interest, which Southern Company Gas purchased in October 2016. Net income for the predecessor period reflected higher revenues from continued investment in infrastructure programs, partially offset by warm weather, net of hedging, and low earnings from wholesale gas services due to mark-to-market losses.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2018 Annual Report


RESULTS OF OPERATIONS
Operating Results
A condensed income statement for Southern Company Gas follows:
 
Successor
 
 
Predecessor
 
Year Ended December 31,
 
Year Ended December 31,
 
July 1, 2016 through December 31,
 
 
January 1, 2016 through
June 30,
 
2018
 
2017
 
2016
 
 
2016
 
(in millions)
 
 
(in millions)
Operating revenues
$
3,909

 
$
3,920

 
$
1,652

 
 
$
1,905

Cost of natural gas
1,539

 
1,601

 
613

 
 
755

Cost of other sales
12

 
29

 
10

 
 
14

Other operations and maintenance
981

 
945

 
480

 
 
452

Depreciation and amortization
500

 
501

 
238

 
 
206

Taxes other than income taxes
211

 
184

 
71

 
 
99

Goodwill impairment
42

 

 

 
 

Gain on dispositions, net
(291
)
 

 

 
 

Merger-related expenses

 

 
41

 
 
56

Total operating expenses
2,994

 
3,260

 
1,453

 
 
1,582

Operating income
915

 
660

 
199

 
 
323

Earnings from equity method investments
148

 
106

 
60

 
 
2

Interest expense, net of amounts capitalized
228

 
200

 
81

 
 
96

Other income (expense), net
1

 
44

 
12

 
 
3

Earnings before income taxes
836

 
610

 
190

 
 
232

Income taxes
464

 
367

 
76

 
 
87

Net Income
372

 
243

 
114

 
 
145

Net income attributable to noncontrolling interest (*)

 

 

 
 
14

Net Income Attributable to Southern Company Gas
$
372

 
$
243

 
$
114

 
 
$
131

(*)
Includes Piedmont's 15% interest in SouthStar, which was acquired by Southern Company Gas in 2016. See Note 7 to the financial statements under " Southern Company Gas " for additional information.
The Southern Company Gas Dispositions were completed by July 29, 2018 and represent the primary variance driver for the 2018 changes. Detailed variance explanations are provided herein. See Note 15 to the financial statements under "Southern Company Gas" for additional information on the Southern Company Gas Dispositions.
Operating Revenues
Operating revenues for the successor year ended December 31, 2018 were $3.9 billion , reflecting an $11 million decrease from 2017. Operating revenues for the successor year ended December 31, 2017 and the successor period of July 1, 2016 through December 31, 2016 were $3.9 billion and $1.7 billion , respectively. For the predecessor period of January 1, 2016 through June 30, 2016, operating revenues were $1.9 billion .

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Southern Company Gas and Subsidiary Companies 2018 Annual Report


For the successor year ended December 31, 2018 , details of operating revenues were as follows:
 
(in millions)
 
(% change)
Operating revenues – prior year
$
3,920

 
 
Estimated change resulting from –
 
 
 
Infrastructure replacement programs and base rate changes
31

 
0.8

Gas costs and other cost recovery
3

 
0.1

Weather
13

 
0.3

Wholesale gas services
138

 
3.5

Southern Company Gas Dispositions (*)
(228
)
 
(5.8
)
Other
32

 
0.8

Operating revenues – current year
$
3,909

 
(0.3
)%
(*)
Includes a $154 million decrease related to natural gas revenues, including alternative revenue programs, and a $74 million decrease related to other revenues. See Note 15 to the financial statements under "Southern Company Gas" for additional information.
Revenues from infrastructure replacement programs and base rate changes increased in 2018 primarily due to a $48 million increase at Nicor Gas, partially offset by a $12 million decrease at Atlanta Gas Light. These amounts include gas distribution operations' continued investments recovered through infrastructure replacement programs and base rate increases less revenue reductions for the impacts of the Tax Reform Legislation. See Note 2 to the financial statements under " Southern Company Gas " for additional information.
Revenues increased due to colder weather in 2018 compared to 2017 . See " Heating Degree Days " herein for additional information.
Revenues from wholesale gas services increased in 2018 primarily due to increased commercial activity, partially offset by derivative losses. See "Segment Information – Wholesale Gas Services" herein for additional information.
Other revenues increased in 2018 primarily due to a $15 million increase from the Dalton Pipeline being placed in service in August 2017 and a $14 million increase in Nicor Gas' revenue taxes.
For the successor year ended December 31, 2017 , natural gas revenues included recovery of $1.6 billion in cost of natural gas and $6 million in net revenues from wholesale gas services, net of $21 million of amortization associated with assets established in the application of acquisition accounting. Also included in natural gas revenues for the successor year ended December 31, 2017 were $99 million in additional revenues generated from gas distribution operations as a result of continued investment in infrastructure replacement programs and increases in base rate revenues at Atlanta Gas Light, Elizabethtown Gas, and Virginia Natural Gas. Natural gas revenues were partially offset by a $13 million negative impact of warmer-than-normal weather, net of hedging.
For the successor period of July 1, 2016 through December 31, 2016, natural gas revenues included recovery of $613 million in cost of natural gas and $24 million in net revenues from wholesale gas services, net of $5 million of amortization associated with assets established in the application of acquisition accounting. Natural gas revenues were partially offset by a $5 million negative impact of warmer-than-normal weather, net of hedging.
For the predecessor period of January 1, 2016 through June 30, 2016, natural gas revenues included recovery of $755 million in cost of natural gas and $32 million in net losses from wholesale gas services. Natural gas revenues were partially offset by a $7 million negative impact of warmer-than-normal weather, net of hedging.
Natural gas distribution rates include provisions to adjust billings for fluctuations in natural gas costs. Therefore, gas costs recovered through natural gas revenues generally equal the amount expensed in cost of natural gas and do not affect net income from gas distribution operations. See " Cost of Natural Gas " herein for additional information. Revenue impacts from weather and customer growth are described further below.
Heating Degree Days
During Heating Season, natural gas usage and operating revenues are generally higher. Weather typically does not have a significant net income impact other than during the Heating Season. The following table presents the Heating Degree Days information for Illinois and Georgia, the primary locations where Southern Company Gas' operations are impacted by weather.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2018 Annual Report


 
 
Years Ended December 31,
 
2018 vs. normal
 
2018 vs. 2017
 
2017 vs. 2016
 
 
Normal (*)
 
2018
 
2017
 
2016
 
colder
 
colder
 
colder (warmer)
 
 
(in thousands)
 
 
 
 
 
 
Illinois
 
5,813

 
6,101

 
5,246

 
5,243

 
5.0
%
 
16.3
%
 
0.1
 %
Georgia
 
2,539

 
2,588

 
1,970

 
2,175

 
1.9
%
 
31.4
%
 
(9.4
)%
(*)
Normal represents the 10-year average from January 1, 2008 through December 31, 2017 for Illinois at Chicago Midway International Airport and for Georgia at Atlanta Hartsfield-Jackson International Airport, based on information obtained from the National Oceanic and Atmospheric Administration, National Climatic Data Center.
Southern Company Gas hedged its exposure to warmer-than-normal weather in Illinois for gas distribution operations and in Illinois and Georgia for gas marketing services. The remaining impacts of weather on earnings are reflected in the chart below.
 
Successor
 
 
Predecessor
 
Year Ended December 31,
 
Year Ended December 31,
 
July 1, 2016 through December 31,
 
 
January 1, 2016
through
June 30,
 
2018
 
2017
 
2016
 
 
2016
 
(in millions)
 
 
(in millions)
Gas Distribution Operations:
 
 
 
 
 
 
 
 
Pre-tax
$
2

 
$
(4
)
 
$
(1
)
 
 
$
(7
)
After tax
1

 
(2
)
 
(1
)
 
 
(5
)
 
 
 
 
 
 
 
 
 
Gas Marketing Services:
 
 
 
 
 
 
 
 
Pre-tax
(2
)
 
(9
)
 
(4
)
 
 

After tax
(1
)
 
(5
)
 
(3
)
 
 

Customer Count
The following table provides the number of customers served by Southern Company Gas at December 31, 2018 , 2017 , and 2016 :
 
 
2018
 
2017
 
2016
 
 
(in thousands, except market share %)
Gas distribution operations (a)
 
4,248

 
4,623

 
4,586

Gas marketing services
 
 
 
 
 
 
Energy customers (b)
 
697

 
774

 
656

Market share of energy customers in Georgia
 
29.0
%
 
29.2
%
 
29.6
%
(a)
Includes total customers of approximately 407,000 and 402,000 at December 31, 2017 and 2016, respectively, related to Elizabethtown Gas, Elkton Gas, and Florida City Gas, which were sold in 2018. See Note 15 to the financial statements under " Southern Company Gas Sale of Elizabethtown Gas and Elkton Gas " and " – Sale of Florida City Gas " for additional information.
(b)
Includes customers in Ohio contracted through an annual auction process to serve for a 12-month period beginning April 1 of each year. At December 31, 2018 and 2017, there were approximately 70,000 and 140,000 contracted customers, respectively. At December 31, 2016, there were no contracted customers.
Southern Company Gas anticipates overall customer growth trends at the remaining four natural gas distribution utilities in gas distribution operations to continue as it expects continued improvement in the new housing market and low natural gas prices. Southern Company Gas uses a variety of targeted marketing programs to attract new customers and to retain existing customers.
Cost of Natural Gas
Excluding Atlanta Gas Light, which does not sell natural gas to end-use customers, gas distribution operations charges its utility customers for natural gas consumed using natural gas cost recovery mechanisms set by the applicable state regulatory agencies. Under these mechanisms, all prudently-incurred natural gas costs are passed through to customers without markup, subject to regulatory review. Gas distribution operations defers or accrues the difference between the actual cost of natural gas and the amount of commodity revenue earned in a given period. The deferred or accrued amount is either billed or refunded to customers prospectively through adjustments to the commodity rate. Deferred natural gas costs are reflected as regulatory assets and accrued natural gas costs are reflected as regulatory liabilities. Therefore, gas costs recovered through natural gas revenues generally equal

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the amount expensed in cost of natural gas and do not affect net income from gas distribution operations. Cost of natural gas at gas distribution operations represented 83.2% of the total cost of natural gas for 2018.
Gas marketing services customers are charged for actual and estimated natural gas consumed. Cost of natural gas includes the cost of fuel and associated transportation costs, lost and unaccounted for gas, adjustments to reduce the value of inventories to market value, if applicable, and gains and losses associated with certain derivatives.
For the successor year ended December 31, 2018 , cost of natural gas was $1.5 billion , a decrease of $62 million , or 3.9% , compared to 2017 substantially all as a result of the Southern Company Gas Dispositions.
For the successor year ended December 31, 2017 , cost of natural gas was $1.6 billion, which reflected an increase in natural gas pricing of 26.3% compared to 2016, partially offset by lower demand for natural gas.
For the successor period of July 1, 2016 through December 31, 2016 and the predecessor period of January 1, 2016 through June 30, 2016, cost of natural gas was $613 million and $755 million , respectively, which reflected low demand for natural gas driven by warm weather during those periods.
Volumes of Natural Gas Sold
The following table details the volumes of natural gas sold during all periods presented.
 
 
Year Ended December 31,
 
2018 vs. 2017
 
2017 vs. 2016
 
 
2018
 
2017
 
2016
 
% Change
 
% Change
Gas distribution operations   (mmBtu in millions)
 
 
 
 
 
 
 
 
 
 
Firm
 
721

 
667

 
670

 
8.1
%
 
(0.4
)%
Interruptible
 
95

 
95

 
96

 
%
 
(1.0
)%
Total
 
816

 
762

 
766

 
7.1
%
 
(0.5
)%
Wholesale gas services (mmBtu in millions/day)
 
 
 
 
 
 
 
 
 
 
Daily physical sales
 
6.7

 
6.4

 
7.4

 
4.7
%
 
(13.5
)%
Gas marketing services (mmBtu in millions)
 
 
 
 
 
 
 
 
 
 
Firm:
 
 
 
 
 
 
 
 
 
 
Georgia
 
37

 
32

 
34

 
15.6
%
 
(5.9
)%
Illinois
 
13

 
12

 
12

 
8.3
%
 
 %
Other
 
20

 
18

 
12

 
11.1
%
 
50.0
 %
Interruptible large commercial and industrial
 
14

 
14

 
14

 
%
 
 %
Total
 
84

 
76

 
72

 
10.5
%
 
5.6
 %
Cost of Other Sales
Cost of other sales related to Pivotal Home Solutions, which was sold on June 4, 2018. See Note 15 to the financial statements under " Southern Company Gas Sale of Pivotal Home Solutions " for additional information.
Other Operations and Maintenance Expenses
For the successor year ended December 31, 2018 , other operations and maintenance expenses increase d $36 million , or 3.8% , compared to the prior year. Excluding a $39 million decrease related to the Southern Company Gas Dispositions, other operations and maintenance expenses increased $75 million. This increase was primarily due to a $53 million increase in compensation and benefit costs, including a $12 million one-time increase for the adoption of a new paid time off policy to align with the Southern Company system, a $28 million increase in disposition-related costs, and an $11 million expense for a litigation settlement to facilitate the sale of Pivotal Home Solutions. These increases were partially offset by a $27 million decrease in bad debt expense primarily at Nicor Gas, which was offset by a decrease in revenues as a result of the related regulatory recovery mechanism. See Note 3 to the financial statements under " General Litigation Matters – Southern Company Gas" for additional information on the litigation settlement.
For the successor year ended December 31, 2017 and the successor period of July 1, 2016 through December 31, 2016, other operations and maintenance expenses were $945 million and $480 million , respectively, and primarily reflected compensation and benefit costs and professional services, including pipeline compliance and maintenance and legal services.

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For the predecessor period of January 1, 2016 through June 30, 2016, other operations and maintenance expenses were $452 million and included pipeline compliance and maintenance costs and compensation and benefit costs.
Depreciation and Amortization
For the successor year ended December 31, 2018 , depreciation and amortization decrease d $1 million , or 0.2% , compared to the prior year. Excluding a $37 million decrease related to the Southern Company Gas Dispositions, depreciation and amortization increased $36 million. This increase was primarily due to continued infrastructure investments at gas distribution operations, partially offset by lower amortization of intangible assets as a result of fair value adjustments in acquisition accounting at gas marketing services.
For the successor year ended December 31, 2017, depreciation and amortization was $501 million and included $38 million of additional amortization of intangible assets as a result of fair value adjustments in acquisition accounting, primarily at gas marketing services, and $28 million in additional depreciation at gas distribution operations, primarily due to continued investment in infrastructure programs.
For the successor period of July 1, 2016 through December 31, 2016, depreciation and amortization was $238 million and included $23 million of additional amortization of intangible assets as a result of fair value adjustments in acquisition accounting, primarily at gas marketing services, as well as depreciation at gas distribution operations due to continued investment in infrastructure programs.
For the predecessor period of January 1, 2016 through June 30, 2016, depreciation and amortization was $206 million and reflected depreciation related to additional assets placed in service at gas distribution operations due to continued investment in infrastructure programs.
See Notes 2 and 15 to the financial statements under " Southern Company Gas Infrastructure Replacement Programs and Capital Projects " and " Southern Company Merger with Southern Company Gas ," respectively, for additional information on infrastructure programs and the application of acquisition accounting.
Taxes Other Than Income Taxes
For the successor year ended December 31, 2018 , taxes other than income taxes increase d $27 million , or 14.7% , compared to the prior year. Excluding a $4 million decrease related to the Southern Company Gas Dispositions, taxes other than income taxes increased $31 million. This increase primarily reflects a $13 million increase in revenue tax expenses as a result of higher natural gas revenues, a $12 million increase in Nicor Gas' invested capital tax that reflects a $7 million credit in 2017 to establish a related regulatory asset, and a $4 million increase in property taxes.
For the successor year ended December 31, 2017, the successor period of July 1, 2016 through December 31, 2016, and the predecessor period of January 1, 2016 through June 30, 2016, taxes other than income taxes were $184 million , $71 million , and $99 million , respectively, which consisted primarily of revenue tax expenses, property taxes, and payroll taxes.
Goodwill Impairment
For the successor year ended December 31, 2018 , a goodwill impairment charge of $ 42 million was r ecorded in contemplation of the sale of Pivotal Home Solutions. See Notes 1 and 15 to the financial statements under " Goodwill and Other Intangible Assets and Liabilities " and " Southern Company Gas Sale of Pivotal Home Solutions ," respectively, for additional information.
Gain on Dispositions, Net
For the successor year ended December 31, 2018 , gain on dispositions, net was $ 291 million and was associated with the Southern Company Gas Dispositions. The income tax expense on these gains included income tax expense on goodwill not deductible for tax purposes and for which a deferred tax liability had not been recorded previously.
Merger-Related Expenses
There were no Merger-related expenses in the successor years ended December 31, 2018 and 2017 .
For the successor period of July 1, 2016 through December 31, 2016, Merger-related expenses were $41 million , including $18 million in rate credits provided to the customers of Elizabethtown Gas and Elkton Gas as conditions of the Merger, $20 million for additional compensation-related expenses, and $3 million for financial advisory fees, legal expenses, and other Merger-related costs.

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For the predecessor period of January 1, 2016 through June 30, 2016, Merger-related expenses were $56 million , including $31 million for financial advisory fees, legal expenses, and other Merger-related costs, and $25 million for additional compensation-related expenses.
See Note 15 to the financial statements under " Southern Company Merger with Southern Company Gas " for additional information.
Earnings from Equity Method Investments
For the successor year ended December 31, 2018 , earnings from equity method investments increase d $42 million , or 39.6% , compared to the prior year. The increase was primarily due to higher earnings from Southern Company Gas' equity method investment in SNG from new rates effective September 2018 and lower operations and maintenance expenses due to the timing of pipeline maintenance.
For the successor year ended December 31, 2017, earnings from equity method investments were $106 million , reflecting $88 million in earnings from Southern Company Gas' investment in SNG, including $33 million related to a non-cash charge recorded by SNG to establish a regulatory liability associated with the Tax Reform Legislation, and $18 million in earnings from all other investments.
For the successor period of July 1, 2016 through December 31, 2016, earnings from equity method investments were $60 million , reflecting $56 million in earnings from Southern Company Gas' investment in SNG and $4 million in earnings from all other investments.
For the predecessor period of January 1, 2016 through June 30, 2016, earnings from equity method investments were not material.
See Notes 7 and 15 to the financial statements under " Southern Company Gas Equity Method Investments SNG " and " Southern Company Gas Investment in SNG ," respectively, for additional information on Southern Company Gas' investment in SNG.
Interest Expense, Net of Amounts Capitalized
For the successor year ended December 31, 2018 , interest expense, net of amounts capitalized increase d $28 million , or 14.0% , compared to the prior year. The increase was primarily due to $21 million of additional interest expense related to new debt issuances and a $4 million reduction in capitalized interest primarily due to the Dalton Pipeline being placed in service in August 2017.
For the successor year ended December 31, 2017, interest expense, net of amounts capitalized was $200 million , which includes the $38 million fair value adjustment on long-term debt in acquisition accounting. Interest expense also reflects debt issuances and redemptions during the period and the recognition of previously deferred interest related to regulatory infrastructure programs.
For the successor period of July 1, 2016 through December 31, 2016, interest expense, net of amounts capitalized was $81 million , which includes the $19 million fair value adjustment on long-term debt in acquisition accounting. Interest expense also reflects debt issuances and redemptions during the period and the recognition of previously deferred interest related to regulatory infrastructure programs.
For the predecessor period of January 1, 2016 through June 30, 2016, interest expense, net of amounts capitalized was $96 million , reflecting debt issuances and redemptions during the period and the recognition of previously deferred interest related to regulatory infrastructure programs.
See FUTURE EARNINGS POTENTIAL – " Regulatory Matters – Unrecognized Ratemaking Amounts" herein for additional information on the unrecognized costs related to the infrastructure programs. Also see FINANCIAL CONDITION AND LIQUIDITY – " Financing Activities " herein and Note 8 to the financial statements for additional information on outstanding debt.
Other Income (Expense), Net
For the successor year ended December 31, 2018 , other income (expense), net decrease d $43 million , or 97.7% , compared to the prior year. Excluding a $3 million decrease related to the Southern Company Gas Dispositions, other income (expense), net decreased $40 million. This decrease was primarily due to a $23 million increase in charitable donations and a $13 million decrease in gains from the settlement of contractor litigation claims.
For the successor year ended December 31, 2017, other income (expense), net was $44 million and primarily related to a $20 million gain from the settlement of contractor litigation claims, $8 million of AFUDC, a $6 million tax gross-up on contributions

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Southern Company Gas and Subsidiary Companies 2018 Annual Report


in aid of construction, and $4 million of interest income. See Note 2 to the financial statements under "Southern Company Gas – PRP Settlement" for additional information on contractor litigation claims.
For the successor period of July 1, 2016 through December 31, 2016, other income (expense), net was $12 million and primarily related to the tax gross-up of contributions in aid of construction received from customers.
For the predecessor period of January 1, 2016 through June 30, 2016, other income (expense), net was not material.
Income Taxes
For the successor year ended December 31, 2018 , income taxes increase d $97 million , or 26.4% , compared to the prior year. Excluding a $329 million increase related to the Southern Company Gas Dispositions, including tax expense on the goodwill for which a deferred tax liability had not been previously provided, income taxes decreased $232 million. This decrease was primarily due to a lower federal income tax rate and the flowback of excess deferred taxes as a result of the Tax Reform Legislation. In addition, 2017 included additional tax expense of $130 million from the revaluation of deferred tax assets associated with the Tax Reform Legislation, the enactment of the State of Illinois income tax legislation, and new income tax apportionment factors in several states.
For the successor year ended December 31, 2017 , income taxes were $367 million . The effective tax rate in 2017 reflects additional expense from the revaluation of deferred tax assets of $93 million associated with the Tax Reform Legislation and $37 million associated with State of Illinois income tax legislation enacted in the third quarter 2017 and new income tax apportionment factors in several states resulting from Southern Company Gas' inclusion in the consolidated Southern Company state tax filings.
For the successor period of July 1, 2016 through December 31, 2016 and the predecessor period of January 1, 2016 through June 30, 2016, income taxes were $76 million and $87 million , respectively. The effective tax rates during these periods reflect certain nondeductible Merger-related expenses.
See FUTURE EARNINGS POTENTIAL – " Income Tax Matters " herein and Note 10 to the financial statements for additional information.
Effects of Inflation
Southern Company Gas is subject to rate regulation that is generally based on the recovery of historical and projected costs. The effects of inflation can create an economic loss since the recovery of costs could be in dollars that have less purchasing power. Any adverse effect of inflation on Southern Company Gas' results of operations has not been substantial in recent years.
Performance and Non-GAAP Measures
Prior to the Merger, Southern Company Gas evaluated segment performance using EBIT, which includes operating income, earnings from equity method investments, and other income (expense), net. EBIT excludes interest expense, net of amounts capitalized and income taxes (benefit), which were evaluated on a consolidated basis for those periods. EBIT is used herein to discuss the results of Southern Company Gas' segments for the predecessor period as EBIT was the primary measure of segment profit or loss for that period. Subsequent to the Merger, Southern Company Gas changed its segment performance measure from EBIT to net income to better align with the performance measure utilized by Southern Company. EBIT for the successor periods presented herein is considered a non-GAAP measure. Southern Company Gas presents consolidated EBIT, which is considered a non-GAAP measure for all periods presented. The presentation of consolidated EBIT is believed to provide useful supplemental information regarding a consolidated measure of profit or loss. Southern Company Gas further believes the presentation of segment EBIT for the successor periods is useful as it allows for a measure of comparability to other companies with different capital and legal structures, which accordingly may be subject to different interest rates and effective tax rates. The applicable reconciliations of net income to consolidated EBIT and segment EBIT are provided herein.
Adjusted operating margin is a non-GAAP measure that is calculated as operating revenues less cost of natural gas, cost of other sales, and revenue tax expense. Adjusted operating margin excludes other operations and maintenance expenses, depreciation and amortization, taxes other than income taxes, goodwill impairment, gain on dispositions, net, and Merger-related expenses, which are included in the calculation of operating income as calculated in accordance with GAAP and reflected in the statements of income. The presentation of adjusted operating margin is believed to provide useful information regarding the contribution resulting from base rate changes, infrastructure replacement programs and capital projects, and customer growth at gas distribution operations since the cost of natural gas and revenue tax expense can vary significantly and are generally billed directly to customers. Southern Company Gas further believes that utilizing adjusted operating margin at gas pipeline investments, wholesale gas services, and gas marketing services allows it to focus on a direct measure of performance before overhead costs. The applicable reconciliation of operating income to adjusted operating margin is provided herein.

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EBIT and adjusted operating margin should not be considered alternatives to, or more meaningful indicators of, Southern Company Gas' operating performance than net income attributable to Southern Company Gas or operating income as determined in accordance with GAAP. In addition, Southern Company Gas' adjusted operating margin may not be comparable to similarly titled measures of other companies.
Detailed variance explanations of Southern Company Gas' financial performance are provided herein.
Reconciliations of operating income to adjusted operating margin and net income attributable to Southern Company Gas to EBIT are as follows:
 
Successor
 
 
Predecessor
 
Year Ended December 31,
 
Year Ended December 31,
 
July 1, 2016 through December 31,
 
 
January 1, 2016
through
June 30,
 
2018
 
2017
 
2016
 
 
2016
 
(in millions)
 
 
(in millions)
Operating Income
$
915

 
$
660

 
$
199

 
 
$
323

Other operating expenses (a)
1,443

 
1,630

 
830

 
 
813

Revenue taxes (b)
(111
)
 
(98
)
 
(31
)
 
 
(56
)
Adjusted Operating Margin
$
2,247

 
$
2,192

 
$
998

 
 
$
1,080

(a)
Includes other operations and maintenance, depreciation and amortization, taxes other than income taxes, goodwill impairment, gain on dispositions, net, and Merger-related expenses.
(b)
Nicor Gas' revenue tax expenses, which are passed through directly to customers.
 
Successor
 
 
Predecessor
 
Year Ended December 31,
 
Year Ended December 31,
 
July 1, 2016 through December 31,
 
 
January 1, 2016 through
June 30,
 
2018
 
2017
 
2016
 
 
2016
 
(in millions)
 
 
(in millions)
Net Income Attributable to Southern Company Gas
$
372

 
$
243

 
$
114

 
 
$
131

Net income attributable to noncontrolling interest

 

 

 
 
14

Income taxes
464

 
367

 
76

 
 
87

Interest expense, net of amounts capitalized
228

 
200

 
81

 
 
96

EBIT
$
1,064

 
$
810

 
$
271

 
 
$
328


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Segment Information
Adjusted operating margin, operating expenses, and Southern Company Gas' primary performance metric for each segment are illustrated in the tables below.
 
 
Successor
 
 
Year ended December 31, 2018
 
Year ended December 31, 2017
 
 
 Adjusted Operating Margin (a)
 
Operating Expenses (a)(b)
 
Net Income (Loss) (b)
 
 Adjusted Operating Margin (a)
 
Operating Expenses (a)
 
Net Income (Loss)
 
 
(in millions)
 
(in millions)
Gas distribution operations
 
$
1,794

 
$
890

 
$
334

 
$
1,834

 
$
1,189

 
$
353

Gas pipeline investments
 
32

 
12

 
103

 
17

 
7

 
(22
)
Wholesale gas services
 
134

 
64

 
38

 
5

 
56

 
(57
)
Gas marketing services
 
263

 
244

 
(40
)
 
313

 
200

 
84

All other
 
33

 
131

 
(63
)
 
35

 
92

 
(115
)
Intercompany eliminations
 
(9
)
 
(9
)
 

 
(12
)
 
(12
)
 

Consolidated
 
$
2,247

 
$
1,332

 
$
372

 
$
2,192

 
$
1,532

 
$
243

(a)
Adjusted operating margin and operating expenses are adjusted for Nicor Gas' revenue tax expenses, which are passed through directly to customers.
(b)
Operating expenses for gas distribution operations and gas marketing services include the gain on dispositions, net. Net income for gas distribution operations and gas marketing services includes the gain on dispositions, net and the associated income tax expense. See Note 15 to the financial statements under " Southern Company Gas " for additional information.
 
 
Successor
 
 
Predecessor
 
 
July 1, 2016 through December 31, 2016
 
 
January 1, 2016 through June 30, 2016
 
 
Adjusted Operating Margin (*)
 
Operating Expenses (*)
 
Net Income (Loss)
 
 
Adjusted Operating Margin (*)
 
Operating Expenses (*)
 
EBIT
 
 
(in millions)
 
 
(in millions)
Gas distribution operations
 
$
817

 
$
592

 
$
77

 
 
$
911

 
$
558

 
$
353

Gas pipeline investments
 
3

 
2

 
29

 
 
3

 

 
3

Wholesale gas services
 
24

 
26

 

 
 
(36
)
 
33

 
(68
)
Gas marketing services
 
139

 
112

 
19

 
 
190

 
81

 
109

All other
 
19

 
71

 
(11
)
 
 
16

 
89

 
(69
)
Intercompany eliminations
 
(4
)
 
(4
)
 

 
 
(4
)
 
(4
)
 

Consolidated
 
$
998

 
$
799

 
$
114

 
 
$
1,080

 
$
757

 
$
328

(*)
Adjusted operating margin and operating expenses are adjusted for Nicor Gas' revenue tax expenses, which are passed through directly to customers.
Gas Distribution Operations
Gas distribution operations is the largest component of Southern Company Gas' business and is subject to regulation and oversight by agencies in each of the states it serves. These agencies approve natural gas rates designed to provide Southern Company Gas with the opportunity to generate revenues to recover the cost of natural gas delivered to its customers and its fixed and variable costs, including depreciation, interest, operations and maintenance, taxes, and overhead costs, and to earn a reasonable return on its investments.
With the exception of Atlanta Gas Light, Southern Company Gas' second largest utility that operates in a deregulated natural gas market and has a straight-fixed-variable rate design that minimizes the variability of its revenues based on consumption, the earnings of the natural gas distribution utilities can be affected by customer consumption patterns that are a function of weather conditions, price levels for natural gas, and general economic conditions that may impact customers' ability to pay for natural gas consumed. Southern Company Gas has various weather mechanisms, such as weather normalization mechanisms and weather derivative instruments, that limit its exposure to weather changes within typical ranges in its natural gas distribution utilities' service territories.

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Southern Company Gas and Subsidiary Companies 2018 Annual Report


On July 1, 2018, a Southern Company Gas subsidiary, Pivotal Utility Holdings, completed the sales of the assets of two of its natural gas distribution utilities, Elizabethtown Gas and Elkton Gas, to South Jersey Industries, Inc. On July 29, 2018, Southern Company Gas and its wholly-owned direct subsidiary, NUI Corporation, completed the sale of Pivotal Utility Holdings, which primarily consisted of Florida City Gas, to NextEra Energy. See Note 15 to the financial statements under " Southern Company Gas " for additional information.
2018 vs. 2017
Net income decrease d $19 million , or 5.4% , compared to the prior year, which includes a $40 million decrease in adjusted operating margin, a $299 million decrease in operating expenses, and a $22 million decrease in other income (expense), net resulting in a $237 million increase in EBIT. The decrease in net income also includes a $25 million increase in interest expense, net of amounts capitalized and a $231 million increase in income tax expense.
Excluding a $90 million decrease attributable to the utilities sold during 2018, adjusted operating margin increased $50 million, which primarily reflects additional revenue from infrastructure investments and colder weather in 2018, partially offset by lower rates and revenue deferrals for regulatory liabilities associated with the Tax Reform Legislation impacts. Excluding a $391 million decrease attributable to the utilities sold during 2018 that includes the related gains on the sales, operating expenses increased $92 million. This increase reflects $40 million of additional depreciation primarily due to additional assets placed in service, $37 million of additional other operations and maintenance expenses primarily due to increased compensation and benefit costs, partially offset by a decrease in bad debt expense, and $15 million of additional taxes other than income taxes primarily due to a $12 million increase in Nicor Gas' invested capital tax. Excluding a $3 million decrease attributable to the utilities sold during 2018, other income (expense), net decreased $20 million, which primarily reflects a $13 million decrease in gains from the settlement of contractor litigation claims. The increase in interest expense reflects $14 million of additional interest expense primarily from the issuance of first mortgage bonds at Nicor Gas. Excluding a $290 million decrease attributable to the utilities sold in 2018, income tax expense decreased $59 million, primarily due to lower pretax earnings, a lower federal income tax rate, and the flowback of excess deferred taxes as a result of the Tax Reform Legislation.
Successor Year Ended December 31, 2017
Net income of $353 million includes $1.8 billion in adjusted operating margin, $1.2 billion in operating expenses, and $39 million in other income (expense), net, which resulted in EBIT of $684 million . Net income also includes $153 million in interest expense, net of amounts capitalized and $178 million in income tax expense. Adjusted operating margin reflects $99 million in additional revenue from continued investment in infrastructure replacement programs and base rate increases at Atlanta Gas Light, Elizabethtown Gas, and Virginia Natural Gas. Adjusted operating margin was also affected by increased customer growth, partially offset by the negative impact of warmer-than-normal weather, net of hedging. Operating expenses reflect a $28 million increase in depreciation associated with additional assets placed in service, as well as benefit and compensation costs, legal expenses, and pipeline compliance and maintenance expenses. Other income (expense), net reflects a $20 million gain from the settlement of contractor litigation claims. Interest expense reflects the impact of intercompany promissory notes executed in December 2016 and the issuance of first mortgage bonds at Nicor Gas in August 2017 and November 2017. Income tax expense includes a $22 million benefit as a result of the Tax Reform Legislation.
See Note 2 to the financial statements under " Southern Company Gas – PRP Settlement" for additional information on contractor litigation claims. See FINANCIAL CONDITION AND LIQUIDITY – "Financing Activities" herein and Note 8 to the financial statements for additional information on debt issuances. See FUTURE EARNINGS POTENTIAL – " Income Tax Matters " herein and Note 10 to the financial statements for additional information.
Successor Period of July 1, 2016 through December 31, 2016
Net income of $77 million includes $817 million in adjusted operating margin, $592 million in operating expenses, and $8 million in other income (expense), net, resulting in EBIT of $233 million . Net income also includes $105 million in interest expense, net of amounts capitalized and $51 million in income tax expense. Adjusted operating margin reflects revenue from continued investment in infrastructure replacement programs, partially offset by the impact of warm weather, net of hedging. Operating expenses reflect the depreciation associated with additional assets placed in service, the related expenses associated with pipeline compliance and maintenance activities, and $18 million of rate credits provided to the customers of Elizabethtown Gas and Elkton Gas as conditions of the Merger. See Note 15 to the financial statements under " Southern Company Merger with Southern Company Gas " for additional information.

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Southern Company Gas and Subsidiary Companies 2018 Annual Report


Predecessor Period of January 1, 2016 through June 30, 2016
EBIT of $353 million includes $911 million in adjusted operating margin and $558 million in operating expense. Adjusted operating margin reflects increased revenue from continued investment in infrastructure replacement programs and the impact of customer usage and growth, partially offset by the impact of warm weather, net of hedging. Operating expenses reflect the depreciation associated with additional assets placed in service.
Gas Pipeline Investments
Gas pipeline investments consists primarily of joint ventures in natural gas pipeline investments including SNG, Atlantic Coast Pipeline, PennEast Pipeline, and Dalton Pipeline. See Note 7 to the financial statements under " Southern Company Gas " for additional information.
2018 vs. 2017
Net income increase d $125 million compared to the prior year, which includes a $15 million increase in adjusted operating margin primarily due to the Dalton Pipeline being placed in service in August 2017, a $5 million increase in operating expenses primarily due to increased depreciation and property tax expense related to the Dalton Pipeline, and a $42 million increase in earnings from equity method investments primarily at SNG, resulting in a $52 million increase in EBIT. The increase in net income also includes an $8 million increase in interest expense, net of amounts capitalized primarily due to a reduction in capitalized interest after the Dalton Pipeline was placed in service and an $81 million decrease in income tax expense primarily due to a lower federal income tax rate in 2018 and additional tax expense recorded in 2017 associated with the Tax Reform Legislation, partially offset by higher pretax earnings.
Successor Year Ended December 31, 2017
Net loss of $22 million includes $17 million in adjusted operating margin, $7 million in operating expenses, and $103 million in earnings from equity method investments, consisting primarily of Southern Company Gas' equity interest in SNG, including $33 million related to a non-cash charge recorded by SNG to establish a regulatory liability associated with the Tax Reform Legislation, which resulted in EBIT of $113 million . Also included in net income are $26 million in interest expense, net of amounts capitalized and $109 million in income tax expense. Income tax expense includes $66 million resulting from the revaluation of deferred income tax assets associated with the Tax Reform Legislation and $7 million related to the allocation of new income tax apportionment factors in several states resulting from Southern Company Gas' inclusion in the consolidated Southern Company state tax filings. See FUTURE EARNINGS POTENTIAL – " Income Tax Matters " herein and Note 10 to the financial statements for additional information.
Successor Period of July 1, 2016 through December 31, 2016
Net income of $29 million includes $3 million in adjusted operating margin, $2 million in operating expenses, and $59 million in earnings from equity method investments, consisting primarily of Southern Company Gas' 2016 acquired equity interest in SNG, resulting in EBIT of $60 million . Also included in net income are $10 million in interest expense, net of amounts capitalized and $21 million in income tax expense.
Predecessor Period of January 1, 2016 through June 30, 2016
Earnings before interest and taxes for the predecessor period of January 1, 2016 through June 30, 2016 was $3 million .
Wholesale Gas Services
Wholesale gas services is involved in asset management and optimization, storage, transportation, producer and peaking services, natural gas supply, natural gas services, and wholesale gas marketing. Southern Company Gas has positioned the business to generate positive economic earnings on an annual basis even under low volatility market conditions that can result from a number of factors. When market price volatility increases, wholesale gas services is well positioned to capture significant value and generate stronger results. Operating expenses primarily reflect employee compensation and benefits.
2018 vs. 2017
Net income increase d $95 million , or 166.7% , compared to the prior year, which includes a $129 million increase in adjusted operating margin, an $8 million increase in operating expenses, a $1 million increase in interest income, and a $21 million decrease in other income (expense), net resulting in a $101 million increase in EBIT. The increase in net income also includes a $2 million increase in interest expense, net of amounts capitalized and a $4 million increase in income tax expense. Details of the increase in adjusted operating margin are provided in the table below. The increase in operating expenses primarily reflects higher

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Southern Company Gas and Subsidiary Companies 2018 Annual Report


compensation and benefit expense. The decrease in other income (expense), net primarily reflects increased charitable donations. The increase in income tax expense reflects higher pretax earnings, partially offset by a lower federal income tax rate.
Successor Year Ended December 31, 2017
Net loss of $57 million includes $5 million in adjusted operating margin, $56 million in operating expenses, and $1 million in other income (expense), net, which resulted in a loss before interest and taxes of $50 million . Also included are $7 million in interest expense, net of amounts capitalized. Adjusted operating margin reflects a decrease of $21 million due to fair value adjustments to certain assets and liabilities in the application of acquisition accounting. Also reflected in adjusted operating margin is revenue from commercial activity partially offset by mark-to-market losses. Income tax expense includes $21 million resulting from the revaluation of deferred income tax assets associated with the Tax Reform Legislation. See FUTURE EARNINGS POTENTIAL – " Income Tax Matters " herein and Note 10 to the financial statements for additional information.
Successor Period of July 1, 2016 through December 31, 2016
Net income includes $24 million in adjusted operating margin, $26 million in operating expenses, and $2 million in other income (expense), net, resulting in no EBIT. Also included are $3 million in interest expense, net of amounts capitalized and $3 million in income tax benefit. Adjusted operating margin reflects a decrease of $5 million due to fair value adjustments to certain assets and liabilities in the application of acquisition accounting. Also reflected in adjusted operating margin are mark-to-market gains due to changes in natural gas prices in the fourth quarter 2016 and losses from commercial activity due to low volatility in natural gas prices and warm weather. Operating expenses reflect low incentive compensation expense due to low earnings.
Predecessor Period of January 1, 2016 through June 30, 2016
Loss before interest and taxes of $68 million includes $(36) million in adjusted operating margin, $33 million in operating expense, and $1 million in other income (expense), net. Adjusted operating margin reflects mark-to-market losses and LOCOM adjustments as a result of changes in natural gas prices and revenues from commercial activity driven by changes in price volatility. Operating expenses reflect lower incentive compensation expense as compared to the same period in the prior year due to lower earnings.
The following table illustrates the components of wholesale gas services' adjusted operating margin for the periods presented:
 
Successor
 
 
Predecessor
 
Year Ended December 31,
 
Year Ended December 31,
 
July 1, 2016 through December 31,
 
 
January 1, 2016
through
June 30,
 
2018
 
2017
 
 2016
 
 
2016
 
(in millions)
 
 
(in millions)
Commercial activity recognized
$
254

 
$
116

 
$
(15
)
 
 
$
34

Gain (loss) on storage derivatives
9

 
23

 
(20
)
 
 
(38
)
Gain (loss) on transportation and forward
commodity derivatives
(119
)
 
(113
)
 
64

 
 
(31
)
LOCOM adjustments, net of current period recoveries
(7
)
 

 

 
 
(1
)
Purchase accounting adjustments to fair value
inventory and contracts
(3
)
 
(21
)
 
(5
)
 
 

Adjusted operating margin
$
134

 
$
5

 
$
24

 
 
$
(36
)
Change in Commercial Activity
The commercial activity at wholesale gas services includes recognition of storage and transportation values that were generated in prior periods, which reflect the impact of prior period hedge gains and losses as associated physical transactions oc cur. The increase in commercial activity in 2018 compared to the prior year was primarily due to natural gas price volatility that was generated by favorable weather and a corresponding increase in power generation volumes coupled with decreased natural gas supply.
Change in Storage and Transportation Derivatives
Volatility in the natural gas market arises from a number of factors, such as weather fluctuations or changes in supply or demand for natural gas in different regions of the U.S. The volatility of natural gas commodity prices has a significant impact on Southern Company Gas' customer rates, long-term competitive position against other energy sources, and the ability of wholesale gas

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services to capture value from locational and seasonal spreads. Forward storage or time spreads applicable to the locations of wholesale gas services' specific storage positions in 2018 resulted in storage derivative gains. Transportation and forward commodity losses in 2018 are primarily the result of widening transportation spreads due to favorable weather, which impacted forward prices at natural gas receipt and delivery points primarily in the Northeast and Midwest regions.
The natural gas that Southern Company Gas purchases and injects into storage is accounted for at the LOCOM value utilizing gas daily or spot prices at the end of the year. A LOCOM adjustment, net of current period recoveries of $7 million, was recorded during 2018 and LOCOM adjustments for all other periods presented were immaterial. See Note 1 to the financial statements under "Natural Gas for Sale" for additional information.
Withdrawal Schedule and Physical Transportation Transactions
The expected natural gas withdrawals from storage and expected offset to prior hedge losses/gains associated with the transportation portfolio of wholesale gas services are presented in the following table, along with the net operating revenues expected at the time of withdrawal from storage and the physical flow of natural gas between contracted transportation receipt and delivery points. Wholesale gas services' expected net operating revenues exclude storage and transportation demand charges, as well as other variable fuel, withdrawal, receipt, and delivery charges, and exclude estimated profit sharing under asset management agreements. Further, the amounts that are realizable in future periods are based on the inventory withdrawal schedule, planned physical flow of natural gas between the transportation receipt and delivery points, and forward natural gas prices at December 31, 2018. A portion of wholesale gas services' storage inventory and transportation capacity is economically hedged with futures contracts, which results in the realization of substantially fixed net operating revenues.
 
Storage Withdrawal
 
 
 
Total storage (a)
 
Expected net operating losses (b)
 
Physical Transportation Transactions – Expected Net Operating Gains (c)
 
(in mmBtu in millions)
 
(in millions)
 
(in millions)
2019
48

 
$
(8
)
 
$
12

2020 and thereafter

 

 
107

Total at December 31, 2018
48

 
$
(8
)
 
$
119

(a)
At December 31, 2018, the WACOG of wholesale gas services' expected natural gas withdrawals from storage was $2.90 per mmBtu.
(b)
Represents expected operating losses from planned storage withdrawals associated with existing inventory positions and could change as wholesale gas services adjusts its daily injection and withdrawal plans in response to changes in future market conditions and forward NYMEX price fluctuations.
(c)
Represents the periods associated with the transportation derivative net gains during which the derivatives will be settled and the physical transportation transactions will occur that offset the derivative gains and losses that were previously recognized.
Gas Marketing Services
Gas marketing services provides energy-related products and services to natural gas markets and participants in customer choice programs that were approved in various states to increase competition. These programs allow customers to choose their natural gas supplier while the local distribution utility continues to provide distribution and transportation services . Gas marketing services is weather sensitive and uses a variety of hedging strategies, such as weather derivative instruments and other risk management tools, to partially mitigate potential weather impacts.
On June 4, 2018, Southern Company Gas completed the sale of Pivotal Home Solutions to American Water Enterprises LLC. See Note 15 under " Southern Company Gas Sale of Pivotal Home Solutions " for additional information.
2018 vs. 2017
Net income decrease d $124 million , or 147.6% , compared to the prior year, which includes a $50 million decrease in adjusted operating margin, a $44 million increase in operating expenses, and a $1 million increase in other income (expense), net resulting in a $93 million decrease in EBIT. The decrease in net income also includes a $1 million increase in interest expense, net of amounts capitalized and a $30 million increase in income tax expense.
Excluding a $57 million decrease attributable to Pivotal Home Solutions, adjusted operating margin increased $7 million, which primarily reflects colder weather in 2018, customer growth, and favorable retail price spreads. Excluding a $42 million increase attributable to Pivotal Home Solutions that includes the loss on disposition and the goodwill impairment charge, operating expense increased $2 million. Excluding a $39 million increase attributable to Pivotal Home Solutions, income tax expense decreased $9 million driven by a lower federal income tax rate, partially offset by higher pretax earnings.

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Southern Company Gas and Subsidiary Companies 2018 Annual Report


Successor Year Ended December 31, 2017
Net income of $84 million includes $313 million in adjusted operating margin and $200 million in operating expenses, which resulted in EBIT of $113 million . Net income also includes $5 million in interest expense, net of amounts capitalized and $24 million in income tax expense. Adjusted operating margin reflects a $9 million negative impact of warmer-than-normal weather, net of hedging, and $4 million in unrealized hedge losses, net of recoveries. Operating expenses includes $40 million in additional amortization of intangible assets established in the application of acquisition accounting. Income tax expense includes a $19 million benefit as a result of the Tax Reform Legislation. See FUTURE EARNINGS POTENTIAL – " Income Tax Matters " herein and Note 10 to the financial statements for additional information.
Successor Period of July 1, 2016 through December 31, 2016
Net income of $19 million includes $139 million in adjusted operating margin and $112 million in operating expenses, resulting in EBIT of $27 million Net income also includes $1 million in interest expense, net of amounts capitalized and $7 million in income tax expense. Adjusted operating margin reflects a reduction of $5 million due to fair value adjustments to certain assets and liabilities in the application of acquisition accounting. Also reflected in adjusted operating margin are unrealized hedge gains and LOCOM adjustments. Operating expenses reflect $23 million in additional amortization of intangible assets, partially offset by a $2 million reduction in operations and maintenance expenses due to fair value adjustments to certain assets and liabilities in the application of acquisition accounting. See Note 1 to the financial statements under "Natural Gas for Sale" for additional information on LOCOM adjustments and Note 15 to the financial statements under " Southern Company Merger with Southern Company Gas " for additional information on the Merger.
Predecessor Period of January 1, 2016 through June 30, 2016
EBIT of $109 million includes $190 million in adjusted operating margin and $81 million in operating expenses. Adjusted operating margin reflects $9 million in unrealized hedge gains. Operating expenses reflect lower bad debt, marketing, and depreciation and amortization, compared to the same period in the prior year. Earnings also include $14 million attributable to noncontrolling interest.
All Other
All other includes Southern Company Gas' storage and fuels operations and its investment in Triton, AGL Services Company, and Southern Company Gas Capital, as well as various corporate operating expenses that are not allocated to the reportable segments and interest income (expense) associated with affiliate financing arrangements.
2018 vs. 2017
Net loss decrease d $52 million , or 45.2% , compared to the prior year, which includes a $2 million decrease in adjusted operating margin, a $39 million increase in operating expenses, a $3 million increase in interest income, and a $5 million decrease in other income (expense), net resulting in a $43 million decrease in EBIT. The decrease in net loss also includes an $8 million decrease in interest expense, net of amounts capitalized and an $87 million decrease in income tax expense. The increase in operating expenses primarily reflects a $28 million increase in disposition-related costs and a $12 million increase in compensation expenses resulting from the adoption of a new paid time off policy. The decrease in income tax expense primarily reflects the 2017 increase in income tax expense related to the revaluation of deferred tax assets associated with the Tax Reform Legislation, the enactment of the State of Illinois income tax legislation, new income tax apportionment factors in several states, and a lower federal income tax rate in 2018. The decrease also reflects lower pretax earnings in 2018 compared to 2017.
Successor Year Ended December 31, 2017
Net loss of $115 million includes $35 million in adjusted operating margin and $92 million in operating expenses. Operating expenses included $26 million of integration-related costs. Interest expense, net of amounts capitalized was $9 million due to intercompany promissory notes that were executed in December 2016. Income tax expense was $56 million and includes $46 million resulting from the revaluation of deferred tax assets associated with the Tax Reform Legislation and $30 million associated with State of Illinois tax legislation enacted during the third quarter 2017 and new income tax apportionment factors in several states resulting from Southern Company Gas' inclusion in the consolidated Southern Company state tax filings, partially offset by income tax benefit on the pre-tax loss. See FINANCIAL CONDITION AND LIQUIDITY – "Financing Activities" herein for additional financing information and FUTURE EARNINGS POTENTIAL – " Income Tax Matters " herein and Note 10 to the financial statements for additional information.

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Successor Period of July 1, 2016 through December 31, 2016
Operating expenses included Merger-related expenses of $41 million primarily comprised of compensation-related expenses, financial advisory fees, legal expenses, and other Merger-related costs and $8 million in expenses associated with certain benefit arrangements.
Predecessor Period of January 1, 2016 through June 30, 2016
For the predecessor period of January 1, 2016 through June 30, 2016, operating expenses included Merger-related expenses of $56 million . These expenses are primarily comprised of financial advisory and legal expenses as well as additional compensation-related expenses, including acceleration of share-based compensation expenses, and change-in-control compensation charges. See Note 15 to the financial statements under " Southern Company Merger with Southern Company Gas " for additional information.
Segment Reconciliations
Reconciliations of net income attributable to Southern Company Gas to EBIT for the years ended December 31, 2018 and 2017 and the period of July 1, 2016 through December 31, 2016, and operating income to adjusted operating margin for all periods presented, are in the following tables. See Note 16 to the financial statements under " Southern Company Gas " for additional segment information.
 
Successor
 
Year Ended December 31, 2018
 
Gas Distribution Operations
Gas Pipeline Investments
Wholesale Gas Services
Gas Marketing Services
All Other
Intercompany Elimination
Consolidated
 
(in millions)
Net Income (Loss) Attributable
to Southern Company Gas
$
334

$
103

$
38

$
(40
)
$
(63
)
$

$
372

Income taxes (benefit)
409

28

4

54

(31
)

464

Interest expense, net of amounts
capitalized
178

34

9

6

1


228

EBIT
$
921

$
165

$
51

$
20

$
(93
)
$

$
1,064

 
Successor
 
Year Ended December 31, 2017
 
Gas Distribution Operations
Gas Pipeline Investments
Wholesale Gas Services
Gas Marketing Services
All Other
Intercompany Elimination
Consolidated
 
(in millions)
Net Income (Loss) Attributable
to Southern Company Gas
$
353

$
(22
)
$
(57
)
$
84

$
(115
)
$

$
243

Income taxes
178

109


24

56


367

Interest expense, net of amounts
capitalized
153

26

7

5

9


200

EBIT
$
684

$
113

$
(50
)
$
113

$
(50
)
$

$
810


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Southern Company Gas and Subsidiary Companies 2018 Annual Report


 
Successor
 
July 1, 2016 through December 31, 2016
 
Gas Distribution Operations
Gas Pipeline Investments
Wholesale Gas Services
Gas Marketing Services
All Other
Intercompany Elimination
Consolidated
 
(in millions)
Net Income (Loss) Attributable
to Southern Company Gas
$
77

$
29

$

$
19

$
(11
)
$

$
114

Income taxes (benefit)
51

21

(3
)
7



76

Interest expense, net of amounts
capitalized
105

10

3

1

(38
)

81

EBIT
$
233

$
60

$

$
27

$
(49
)
$

$
271

 
Successor
 
Year Ended December 31, 2018
 
Gas Distribution Operations
Gas Pipeline Investments
Wholesale Gas Services
Gas Marketing Services
All Other
Intercompany Elimination
Consolidated
 
(in millions)
Operating Income (Loss)
$
904

$
20

$
70

$
19

$
(98
)
$

$
915

Other operating expenses (a)
1,001

12

64

244

131

(9
)
1,443

Revenue tax expense (b)
(111
)





(111
)
Adjusted Operating Margin  
$
1,794

$
32

$
134

$
263

$
33

$
(9
)
$
2,247

 
Successor
 
Year Ended December 31, 2017
 
Gas Distribution Operations
Gas Pipeline Investments
Wholesale Gas Services
Gas Marketing Services
All Other
Intercompany Elimination
Consolidated
 
(in millions)
Operating Income (Loss)
$
645

$
10

$
(51
)
$
113

$
(57
)
$

$
660

Other operating expenses (a)
1,287

7

56

200

92

(12
)
1,630

Revenue tax expense (b)
(98
)





(98
)
Adjusted Operating Margin  
$
1,834

$
17

$
5

$
313

$
35

$
(12
)
$
2,192

 
Successor
 
July 1, 2016 through December 31, 2016
 
Gas Distribution Operations
Gas Pipeline Investments
Wholesale Gas Services
Gas Marketing Services
All Other
Intercompany Elimination
Consolidated
 
(in millions)
Operating Income (Loss)
$
225

$
1

$
(2
)
$
27

$
(52
)
$

$
199

Other operating expenses (a)
623

2

26

112

71

(4
)
830

Revenue tax expense (b)
(31
)





(31
)
Adjusted Operating Margin  
$
817

$
3

$
24

$
139

$
19

$
(4
)
$
998


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Southern Company Gas and Subsidiary Companies 2018 Annual Report


 
Predecessor
 
January 1, 2016 through June 30, 2016
 
Gas Distribution Operations
Gas Pipeline Investments
Wholesale Gas Services
Gas Marketing Services
All Other
Intercompany Elimination
Consolidated
 
(in millions)
Operating Income (Loss)
$
353

$
3

$
(69
)
$
109

$
(73
)
$

$
323

Other operating expenses (a)
614


33

81

89

(4
)
813

Revenue tax expense (b)
(56
)





(56
)
Adjusted Operating Margin  
$
911

$
3

$
(36
)
$
190

$
16

$
(4
)
$
1,080

(a)
Includes other operations and maintenance, depreciation and amortization, taxes other than income taxes, goodwill impairment, gain on dispositions, net, and Merger-related expenses.
(b)
Nicor Gas' revenue tax expenses, which are passed through directly to customers.
FUTURE EARNINGS POTENTIAL
General
The results of operations for the past three years are not necessarily indicative of future earnings potential. The Southern Company Gas Dispositions are expected to materially decrease future earnings and cash flows to Southern Company Gas. For the year ended December 31, 2018, pre-tax earnings attributable to these dispositions were $297 million, which includes a $291 million gain on dispositions, net and a $42 million goodwill impairment. For the year ended December 31, 2017, net income attributable to these dispositions was $71 million, which included additional tax expense of $16 million associated with the Tax Reform Legislation. Due to the seasonal nature of the natural gas business and other factors including, but not limited to, weather, regulation, competition, customer demand, and general economic conditions, these results are not necessarily indicative of the results to be expected for any other period. The level of Southern Company Gas' future earnings depends on numerous factors that affect the opportunities, challenges, and risks of Southern Company Gas' primary business of natural gas distribution and its complementary businesses in the gas pipeline investments, wholesale gas services, and gas marketing services sectors. These factors include Southern Company Gas' ability to maintain constructive regulatory environments that allow for the timely recovery of prudently-incurred costs, the completion and subsequent operation of ongoing infrastructure and other construction projects, creditworthiness of customers, its ability to optimize its transportation and storage positions, and its ability to re-contract storage rates at favorable prices.
Future earnings will be driven by customer growth and are subject to a variety of other factors. These factors include weather, competition, new energy contracts with other utilities and other wholesale customers, energy conservation practiced by customers, the use of alternative energy sources by customers, the price of natural gas, the price elasticity of demand, and the rate of economic growth or decline in Southern Company Gas' service territories. Demand for natural gas is primarily driven by the pace of economic growth that may be affected by changes in regional and global economic conditions, which may impact future earnings.
Volatility of natural gas prices has a significant impact on Southern Company Gas' customer rates, its long-term competitive position against other energy sources, and the ability of its gas marketing services and wholesale gas services segments to capture value from locational and seasonal spreads. Additionally, changes in commodity prices subject a significant portion of Southern Company Gas' operations to earnings variability. Over the longer term, volatility is expected to be low to moderate and locational and/or transportation spreads are expected to decrease as new pipelines are built to reduce the existing supply constraints in the shale areas of the Northeast U.S. To the extent these pipelines are delayed or not built, volatility could increase. See " FERC Matters " herein for additional information on permitting challenges experienced by the Atlantic Coast Pipeline. Additional economic factors may contribute to this environment, including a significant drop in oil and natural gas prices, which could lead to consolidation of natural gas producers or reduced levels of natural gas production. Further, if economic conditions continue to improve, the demand for natural gas may increase, which may cause natural gas prices to rise and drive higher volatility in the natural gas markets on a longer-term basis.
As part of its business strategy, Southern Company Gas regularly considers and evaluates joint development arrangements as well as acquisitions and dispositions of businesses and assets.
On June 4, 2018, Southern Company Gas completed the stock sale of Pivotal Home Solutions to American Water Enterprises LLC. Southern Company Gas and American Water Enterprises LLC entered into a transition services

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Southern Company Gas and Subsidiary Companies 2018 Annual Report


agreement whereby Southern Company Gas provided certain administrative and operational services through November 4, 2018.
On July 1, 2018, a Southern Company Gas subsidiary, Pivotal Utility Holdings, completed the sales of the assets of two of its natural gas distribution utilities, Elizabethtown Gas and Elkton Gas, to South Jersey Industries, Inc. Southern Company Gas and South Jersey Industries, Inc. entered into transition services agreements whereby Southern Company Gas will provide certain administrative and operational services through no later than July 31, 2020.
On July 29, 2018, Southern Company Gas and its wholly-owned direct subsidiary, NUI Corporation, completed the stock sale of Pivotal Utility Holdings, which primarily consisted of Florida City Gas, to NextEra Energy. Southern Company Gas and NextEra Energy entered into a transition services agreement whereby Southern Company Gas will provide certain administrative and operational services through no later than July 29, 2020.
See OVERVIEW – " Merger, Acquisition, and Disposition Activities " herein and Note 15 to the financial statements under " Southern Company Gas " for additional information on these dispositions. See BUSINESS – "Seasonality" in Item 1, RISK FACTORS in Item 1A, and OVERVIEW – "Seasonality of Results" for additional information on seasonality.
Environmental Matters
Southern Company Gas' operations are regulated by state and federal environmental agencies through a variety of laws and regulations governing air, water, land, and protection of other natural resources. Southern Company Gas maintains a comprehensive environmental compliance strategy to assess upcoming requirements and compliance costs associated with these environmental laws and regulations. The costs, including capital expenditures and operations and maintenance costs, required to comply with environmental laws and regulations may impact future results of operations, cash flows, and financial condition. A major portion of these compliance costs are expected to be recovered through customer rates. The ultimate impact of the environmental laws and regulations discussed herein will depend on various factors, such as state adoption and implementation of requirements and the outcome of pending and/or future legal challenges.
New or revised environmental laws and regulations could affect many areas of Southern Company Gas' operations. The impact of any such changes cannot be determined at this time. Environmental compliance costs could affect earnings if such costs cannot continue to be recovered in rates on a timely basis . Further, increased costs that are recovered through regulated rates could contribute to reduced demand for natural gas , which could negatively affect results of operations, cash flows, and/or financial condition. Additionally, many commercial and industrial customers may also be affected by existing and future environmental requirements, which for some may have the potential to ultimately affect their demand for natural gas .
Environmental Remediation
Southern Company Gas is subject to environmental remediation liabilities associated with 40 former MGP sites in four different states. Southern Company Gas conducts studies to determine the extent of any required cleanup and has recognized the costs to clean up known impacted sites in its financial statements. An accrued environmental remediation liability of $294 million was included in the balance sheets at December 31, 2018 , of which $26 million is expected to be incurred over the next 12 months. The accrued environmental remediation liability decreased at December 31, 2018 primarily due to the disposition of $85 million that related to Elizabethtown Gas. The natural gas distribution utilities in Illinois and Georgia have received authority from their respective state regulators to recover approved environmental compliance costs through regulatory mechanisms, which covers substantially all of the total accrued remediation costs. See FINANCIAL CONDITION AND LIQUIDITY – " Capital Requirements and Contractual Obligations " herein and Note 3 to the financial statements under " Environmental Remediation " for additional information.
Water Quality
In 2015, the EPA and the U.S. Army Corps of Engineers (Corps) jointly published a final rule that revised the regulatory definition of waters of the United States (WOTUS) for all Clean Water Act programs. The rule significantly expanded the scope of federal jurisdiction over waterbodies (such as rivers, streams, and canals), which could impact permitting and reporting requirements associated with the installation, expansion, and maintenance of pipeline projects. The EPA and the Corps are expected to publish a final rule in 2019 to replace the 2015 WOTUS definition. The impact of any changes to the 2015 WOTUS rule will depend on the content of this final rule and the outcome of any legal challenges.
Global Climate Issues
The EPA's GHG reporting rule requires annual reporting of GHG emissions expressed in terms of metric tons of CO 2 equivalent emissions for a company's operational control of facilities. Based on ownership or financial control of facilities, Southern

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Company Gas' 2017 GHG emissions were approximately 0.6 million metric tons of CO 2 equivalent. The preliminary estimate of Southern Company Gas' 2018 GHG emissions on the same basis is approximately 0.6 million metric tons of CO 2 equivalent.
FERC Matters
Southern Company Gas is involved in two significant pipeline construction projects within gas pipeline investments. These projects, along with Southern Company Gas' existing pipelines, are intended to provide diverse sources of natural gas supplies to customers, resolve current and long-term supply planning for new capacity, enhance system reliability, and generate economic development in the areas served. The following table provides an overview of these pipeline projects.
 
Miles of Pipe
 
Capital Expenditures (a)
 
Ownership
Percentage
 
 
 
(in millions)
 
 
Atlantic Coast Pipeline (b)
594

 
$
350-390
 
5
%
PennEast Pipeline (c)
118

 
$
276
 
20
%
(a)
Represents Southern Company Gas' expected total capital expenditures, excluding AFUDC, at completion, which may change.
(b)
In 2014, Southern Company Gas entered into a joint venture to construct and operate a natural gas pipeline that will run from West Virginia through Virginia and into eastern North Carolina to meet the region's growing demand for natural gas. The proposed pipeline project is expected to transport natural gas to customers in Virginia. In August 2017, the Atlantic Coast Pipeline received FERC approval.
(c)
In 2014, Southern Company Gas entered into a joint venture to construct and operate a natural gas pipeline that will transport low-cost natural gas from the Marcellus Shale area to customers in New Jersey. Southern Company Gas believes this will alleviate takeaway constraints in the Marcellus region and help mitigate some of the price volatility experienced during recent winters. On January 19, 2018, the PennEast Pipeline received FERC approval.
Work continues with state and federal agencies to obtain the required permits to begin construction on the PennEast Pipeline. Any material delays may impact forecasted capital expenditures and the expected in-service date.
The Atlantic Coast Pipeline has experienced challenges to its permits since construction began in 2018. During the third and fourth quarters 2018, a FERC stop work order, together with delays in obtaining permits necessary for construction and construction delays due to judicial actions, impacted the cost and schedule for the project. As a result, total project cost estimates have increased from between $6.0 billion and $6.5 billion to between $7.0 billion and $7.8 billion, excluding financing costs. Southern Company Gas' share of the total project costs is 5% and Southern Company Gas' investment at December 31, 2018 totaled $83 million.  The operator of the joint venture currently expects to achieve a late 2020 in-service date for at least key segments of the Atlantic Coast Pipeline, while the remainder may extend into early 2021. Southern Company Gas has evaluated the recoverability of its investment and determined there was no impairment as of December 31, 2018. Abnormal weather, work delays (including due to judicial or regulatory action), and other conditions may result in additional cost or schedule modifications, which could result in an impairment of Southern Company Gas' investment and could have a material impact on Southern Company Gas' financial statements.
The ultimate outcome of these matters cannot be determined at this time. See Notes 7 and 9 to the financial statements under " Southern Company Gas Equity Method Investments " and " Guarantees ," respectively, for additional information on these pipeline projects.
In August 2017, the Dalton Pipeline, which serves as an extension of the Transco pipeline system and provides additional natural gas supply to customers in Georgia, was placed in service. Southern Company Gas has a 50% ownership interest in the Dalton Pipeline. See Note 5 to the financial statements under " Joint Ownership Agreements " for additional information.
On November 16, 2018, SNG completed its purchase of Georgia Power's natural gas lateral pipeline serving Plant McDonough Units 4 through 6 at net book value, as approved by the Georgia PSC on January 16, 2018. SNG expects to pay $142 million to Georgia Power in the first quarter 2020. During the interim period, Georgia Power will receive a discounted shipping rate to reflect the delayed consideration. Southern Company Gas' portion of the expected capital expenditures for the purchase of this pipeline and additional construction is $122 million.
Regulatory Matters
Utility Regulation and Rate Design
The natural gas distribution utilities are subject to regulations and oversight by their respective state regulatory agencies. Rates charged to customers vary according to customer class (residential, commercial, or industrial) and rate jurisdiction. These agencies approve rates designed to provide the opportunity to generate revenues to recover all prudently-incurred costs, including a return on rate base sufficient to pay interest on debt and provide a reasonable ROE. Rate base generally consists of the original

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cost of the utility plant in service, working capital, and certain other assets, less accumulated depreciation on the utility plant in service and net deferred income tax liabilities, and may include certain other additions or deductions.
The natural gas market for Atlanta Gas Light was deregulated in 1997. Accordingly, Marketers, rather than a traditional utility, sell natural gas to end-use customers in Georgia and handle customer billing functions. The Marketers file their rates monthly with the Georgia PSC. As a result of operating in a deregulated environment, Atlanta Gas Light's role includes:
distributing natural gas for Marketers;
constructing, operating, and maintaining the gas system infrastructure, including responding to customer service calls and leaks;
reading meters and maintaining underlying customer premise information for Marketers; and
planning and contracting for capacity on interstate transportation and storage systems.
Atlanta Gas Light earns revenue by charging rates to its customers based primarily on monthly fixed charges that are set by the Georgia PSC and adjusted periodically. The Marketers add these fixed charges when billing customers. This mechanism, called a straight-fixed-variable rate design, minimizes the seasonality of Atlanta Gas Light's revenues since the monthly fixed charge is not volumetric or directly weather dependent.
Georgia Rate Adjustment Mechanism (GRAM)
In February 2017, the Georgia PSC approved GRAM and a $20 million increase in annual base rate revenues for Atlanta Gas Light, effective March 1, 2017. GRAM adjusts base rates annually, up or down, using an earnings band based on the previously approved ROE of 10.75% and does not collect revenue through special riders and surcharges. Atlanta Gas Light adjusts rates up to the lower end of the band of 10.55% and adjusts rates down to the higher end of the band of 10.95%. Various infrastructure programs previously authorized by the Georgia PSC under Atlanta Gas Light's STRIDE program including the Integrated Vintage Plastic Replacement Program (i-VPR) to replace aging plastic pipe and the Integrated System Reinforcement Program (i-SRP) to upgrade Atlanta Gas Light's distribution system and LNG facilities in Georgia continue under GRAM and the recovery of and return on the infrastructure program investments are included in annual base rate adjustments. The Georgia PSC reviews Atlanta Gas Light's performance annually under GRAM. See " Rate Proceedings " herein for additional information.
Pursuant to the GRAM approval, Atlanta Gas Light and the staff of the Georgia PSC agreed to a variation of the Integrated Customer Growth Program to extend pipeline facilities to serve customers in areas without pipeline access and create new economic development opportunities in Georgia, which was formerly part of the STRIDE program. As a result, a new tariff was created, effective October 10, 2017, to provide up to $15 million annually for Atlanta Gas Light to commit to strategic economic development projects. Projects under this tariff must be approved by the Georgia PSC.
PRP
In 2015, Atlanta Gas Light began recovering incremental PRP surcharge amounts through three phased-in increases in addition to its already existing PRP surcharge amount, which was established to address recovery of the unrecovered PRP balance of $144 million and the estimated amounts to be earned under the program through 2025. The unrecovered balance is the result of the continued revenue requirement earned under the program offset by the existing and incremental PRP surcharges. The under recovered balance at December 31, 2018 was $171 million , including $95 million of unrecognized equity return. The PRP surcharge will remain in effect until the earlier of the full recovery of the under recovered amount or December 31, 2025. See " Rate Proceedings " and "Unrecognized Ratemaking Amounts" herein for additional information.
With the exception of Atlanta Gas Light, the earnings of the natural gas distribution utilities can be affected by customer consumption patterns that are largely a function of weather conditions and price levels for natural gas. Specifically, customer demand substantially increases during the Heating Season when natural gas is used for heating purposes. Southern Company Gas has various mechanisms, such as weather normalization mechanisms and weather derivative instruments, that limit exposure to weather changes within typical ranges in these utilities' respective service territories.
With the exception of Atlanta Gas Light, the natural gas distribution utilities are authorized by the relevant regulatory agencies in the states in which they serve to use natural gas cost recovery mechanisms that adjust rates to reflect changes in the wholesale cost of natural gas and ensure recovery of all costs prudently incurred in purchasing natural gas for customers. Since Atlanta Gas Light does not sell natural gas directly to its end-use customers, it does not utilize a traditional natural gas cost recovery mechanism. However, Atlanta Gas Light does maintain natural gas inventory for the Marketers in Georgia and recovers the cost through recovery mechanisms approved by the Georgia PSC specific to Georgia's deregulated market. In addition to natural gas recovery mechanisms, there are other cost recovery mechanisms, such as regulatory riders, which vary by utility but allow recovery of certain costs, such as those related to infrastructure replacement programs as well as environmental remediation and

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energy efficiency plans. In traditional rate designs, utilities recover a significant portion of the fixed customer service and pipeline infrastructure costs based on assumed natural gas volumes used by customers. With the exception of Nicor Gas, the utilities have decoupled regulatory mechanisms that Southern Company Gas believes encourage conservation by separating the recoverable amount of these fixed costs from the amounts of natural gas used by customers. Natural gas cost recovery revenues are adjusted for differences in actual recoverable natural gas costs and amounts billed in current regulated rates. Changes in the billing factor will not have a significant effect on Southern Company Gas' revenues or net income, but will affect cash flows. See Note 2 to the financial statements under " Southern Company Gas " for additional information.
The following table provides regulatory information for Southern Company Gas' natural gas distribution utilities:
 
Nicor Gas
 
Atlanta Gas Light
 
Virginia Natural Gas
 
Chattanooga Gas
Authorized ROE (a)(b)
9.80%
 
10.75%
 
9.50%
 
9.80%
Weather normalization mechanisms (c)
 
 
 
 
ü
 
ü
Decoupled, including straight-fixed-variable rates (d)
 
 
ü
 
ü
 

Regulatory infrastructure program rates (e)(f)
ü
 

 
ü
 
 
Bad debt rider (g)
ü
 
 
 
ü
 
ü
Energy efficiency plan (h)
ü
 
 
 
ü
 

Year of last rate decision (i)
2018
 
2018
 
2018
 
2018
(a)
Represents the authorized ROE, or the midpoint of the authorized ROE range, at December 31, 2018 .
(b)
The authorized ROE range for Atlanta Gas Light and Virginia Natural Gas was 10.55% - 10.95% and 9.00% - 10.00%, respectively, at December 31, 2018 .
(c)
Regulatory mechanisms that allow recovery of costs in the event of unseasonal weather, but are not direct offsets to the potential impacts on earnings of weather and customer consumption. These mechanisms are designed to help stabilize operating results by increasing base rate amounts charged to customers when weather is warmer than normal and decreasing amounts charged when weather is colder than normal.
(d)
Recovery of fixed customer service costs separately from assumed natural gas volumes used by customers.
(e)
Programs that update or expand distribution systems and LNG facilities.
(f)
Recovery of program costs at Atlanta Gas Light was incorporated in GRAM, which the Georgia PSC approved in February 2017. See " Infrastructure Replacement Programs and Capital Projects Atlanta Gas Light " herein for additional information.
(g)
The recovery (refund) of bad debt expense over (under) an established benchmark expense. Nicor Gas, Virginia Natural Gas, and Chattanooga Gas recover the gas portion of bad debt expense through their purchased gas adjustment mechanisms.
(h)
Recovery of costs associated with plans to achieve specified energy savings goals.
(i)
See " Rate Proceedings " herein and Note 2 to the financial statements under " Southern Company Gas Rate Proceedings " for additional information.
Infrastructure Replacement Programs and Capital Projects
Southern Company Gas continues to focus on capital discipline and cost control while pursuing projects and initiatives that are expected to have current and future benefits to customers, provide an appropriate return on invested capital, and help ensure the safety and reliability of the utility infrastructure.  In addition to capital expenditures recovered through base rates by each of the natural gas distribution utilities, Nicor Gas and Virginia Natural Gas have separate rate riders that provide timely recovery of capital expenditures for specific infrastructure replacement programs. Total capital expenditures incurred during 2018 for gas distribution operations were $ 1.4 billion , including $97 million related to Elizabethtown Gas, Elkton Gas, and Florida City Gas, which were sold in 2018.
The following table and discussions provide updates on the infrastructure replacement programs and capital projects at the natural gas distribution utilities at December 31, 2018 . These programs are risk-based and designed to update and replace cast iron, bare steel, and mid-vintage plastic materials or expand Southern Company Gas' distribution systems to improve reliability and meet operational flexibility and growth. The anticipated expenditures for these programs in 2019 are quantified in the discussion below.

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Utility
 
Program
 
Recovery
 
Expenditures in 2018
 
Expenditures Since Project Inception
 
Pipe
Installed Since
Project Inception
 
Scope of
Program
 
Program Duration
 
Last
Year of Program
 
 
 
 
 
 
(in millions)
 
(miles)
 
(miles)
 
(years)
 
 
Nicor Gas
 
Investing in Illinois (*)
 
Rider
 
$
409

 
$
1,316

 
706

 
1,500

 
9

 
2023
Virginia Natural Gas
 
Steps to Advance Virginia's Energy (SAVE and SAVE II)
 
Rider
 
40

 
196

 
287

 
496

 
10

 
2021
Total
 
 
 
 
 
$
449

 
$
1,512

 
993

 
1,996

 
 
 
 
(*)
Includes replacement of pipes, compressors, and transmission mains along with other improvements such as new meters. Scope of program miles is an estimate and subject to change.
Nicor Gas
In 2013, Illinois enacted legislation that allows Nicor Gas to provide more widespread safety and reliability enhancements to its distribution system. The legislation stipulates that rate increases to customers as a result of any infrastructure investments shall not exceed a cumulative annual average of 4.0% or, in any given year, 5.5% of base rate revenues. In 2014, the Illinois Commission approved the nine-year regulatory infrastructure program, Investing in Illinois, subject to annual review. Nicor Gas expects to place into service $373 million of qualifying projects under Investing in Illinois in 2019 .
In conjunction with the base rate case order issued by the Illinois Commission on January 31, 2018, Nicor Gas is recovering program costs incurred prior to December 31, 2017 through base rates. Nicor Gas has requested that the program costs incurred subsequent to December 31, 2017, which are currently being recovered through a separate rider, be addressed in the base rate case filed November 9, 2018. See "Rate Proceedings" herein for additional information.
Virginia Natural Gas
In 2012, the Virginia Commission approved the SAVE program, an accelerated infrastructure replacement program, to be completed over a five -year period. In 2016, the Virginia Commission approved an extension to the SAVE program for Virginia Natural Gas to replace more than 200 miles of aging pipeline infrastructure and invest up to $30 million in 2016 and up to $35 million annually through 2021. Virginia Natural Gas expects to invest $35 million under this program in 2019 .
The SAVE program is subject to annual review by the Virginia Commission. In conjunction with the base rate case order issued by the Virginia Commission in December 2017, Virginia Natural Gas is recovering program costs incurred prior to September 1, 2017 through base rates. Program costs incurred subsequent to September 1, 2017 are currently recovered through a separate rider and are subject to future base rate case proceedings.
Atlanta Gas Light
As discussed previously under " Utility Regulation and Rate Design ," i-SRP and i-VPR will continue under GRAM and the recovery of and return on current and future capital investments under the STRIDE program will be included in annual base rate adjustments.
The orders for the STRIDE program provide for recovery of all prudent costs incurred in the performance of the program. Atlanta Gas Light will recover from end-use customers, through billings to Marketers, the costs related to the program, net of any related cost savings. The regulatory asset represents incurred program costs that will be collected through GRAM. The future expected costs to be recovered through rates related to allowed, but not incurred, costs are recognized in an unrecognized ratemaking amount that is not reflected on the balance sheets. This allowed cost is primarily the equity return on the capital investment under the program. See " Unrecognized Ratemaking Amounts " herein for additional information.
Atlanta Gas Light capitalizes and depreciates the capital expenditure costs incurred from the STRIDE programs over the life of the assets. Operations and maintenance costs are expensed as incurred. Recoveries, which are recorded as revenue, are based on a formula that allows Atlanta Gas Light to recover operations and maintenance costs in excess of those included in its current base rates, depreciation, and an allowed rate of return on capital expenditures. However, Atlanta Gas Light is allowed the recovery of carrying costs on the under recovered balance resulting from the timing difference.

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Rate Proceedings
Nicor Gas
On January 31, 2018, the Illinois Commission approved a $137 million increase in annual base rate revenues, including $93 million related to the recovery of investments under the Investing in Illinois program, effective February 8, 2018, based on a ROE of 9.8%.
On April 19, 2018, the Illinois Commission approved Nicor Gas' variable income tax adjustment rider. This rider provides for refund or recovery of changes in income tax expense that result from income tax rates that differ from those used in Nicor Gas' last rate case. Customer refunds, via bill credits, related to the impacts of the Tax Reform Legislation from January 25, 2018 through May 4, 2018 began on July 1, 2018 and are expected to conclude in the second quarter 2019.
On May 2, 2018, the Illinois Commission approved Nicor Gas' rehearing request for revised base rates to incorporate the reduction in the federal income tax rate as a result of the Tax Reform Legislation. The resulting decrease of approximately $44 million in annual base rate revenues became effective May 5, 2018. Nicor Gas' previously-authorized capital structure and ROE of 9.80% were not addressed in the rehearing and remain unchanged.
On November 9, 2018, Nicor Gas filed a general base rate case with the Illinois Commission requesting a $230 million increase in annual base rate revenues. The requested increase is based on a projected test year for the 12-month period ending September 30, 2020, a ROE of 10.6%, and an increase in the equity ratio from 52.0% to 54.0% to address the negative cash flow and credit metric impacts of the Tax Reform Legislation. The Illinois Commission is expected to rule on the requested increase within the 11-month statutory time limit, after which rate adjustments will be effective. The ultimate outcome of this matter cannot be determined at this time.
Atlanta Gas Light
On February 23, 2018, Atlanta Gas Light revised its annual base rate filing to reflect the impacts of the Tax Reform Legislation and requested a $16 million rate reduction in 2018. On May 15, 2018, the Georgia PSC approved a stipulation for Atlanta Gas Light's annual base rates to remain at the 2017 level for 2018 and 2019, with customer credits of $8 million in each of July 2018 and October 2018 to reflect the impacts of the Tax Reform Legislation. The Georgia PSC maintained Atlanta Gas Light's previously authorized earnings band based on a ROE between 10.55% and 10.95% and increased the allowed equity ratio by 4% to an equity ratio of 55% to address the negative cash flow and credit metric impacts of the Tax Reform Legislation. Additionally, Atlanta Gas Light is required to file a traditional base rate case on or before June 1, 2019 for rates effective January 1, 2020.
Atlanta Gas Light's recovery of the previously unrecovered PRP revenue through 2014, as well as the mitigation costs associated with the PRP that were not previously included in its rates, were included in GRAM. In connection with the GRAM approval, the last monthly PRP surcharge increase became effective March 1, 2017.
Virginia Natural Gas
On December 17, 2018, the Virginia Commission approved Virginia Natural Gas' annual information form filing, which reduced annual base rates by $14 million effective January 1, 2019 due to lower tax expense as a result of the lower corporate income tax rate and the impact of the flowback of excess deferred income taxes. This approval also requires Virginia Natural Gas to issue customer refunds, via bill credits, for the entire $14 million which was deferred as a regulatory liability, current, on the balance sheet at December 31, 2018. These customer refunds are expected to be completed in the first quarter 2019.
Affiliate Asset Management Agreements
With the exception of Nicor Gas, the natural gas distribution utilities use asset management agreements with an affiliate, Sequent, for the primary purpose of reducing utility customers' gas cost recovery rates through payments to the utilities by Sequent. For Atlanta Gas Light, these payments are controlled by the Georgia PSC and are utilized for infrastructure improvements and to fund heating assistance programs, rather than as a reduction to gas cost recovery rates. Under these asset management agreements, Sequent supplies natural gas to the utility and markets available pipeline and storage capacity to improve the overall cost of supplying gas to the utility customers. Currently, the natural gas distribution utilities primarily purchase their gas from Sequent. The purchase agreements require Sequent to provide firm gas to the natural gas distribution utilities, but these natural gas distribution utilities maintain the right and ability to make their own long-term supply arrangements if they believe it is in the best interest of their customers.
Upon closing the sales of Elizabethtown Gas and Elkton Gas, an affiliate of South Jersey Industries, Inc. assumed the asset management agreements with wholesale gas services for Elizabethtown Gas and Elkton Gas. The sale of Pivotal Utility Holdings to NextEra Energy did not impact the asset management agreement between Sequent and Florida City Gas, which will remain in

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effect until March 31, 2019. See Note 15 to the financial statements under " Southern Company Gas " for additional information on these dispositions.
Each agreement provides for Sequent to make payments to the natural gas distribution utility through either an annual minimum guarantee within a profit sharing structure, a profit sharing structure without an annual minimum guarantee, or a fixed fee. From the inception of these agreements in 2001 through December 31, 2018 , Sequent made sharing payments to the natural gas distribution utilities under these agreements totaling $425 million .
The following table provides payments made by Sequent to the remaining natural gas distribution utilities under these agreements during the last three years:
 
 
Successor
 
 
Predecessor
 
 
 
 
 
Year Ended December 31,
 
Year Ended December 31,
 
July 1, 2016 through December 31,
 
 
January 1, 2016
through
June 30,
 
 
 
 
 
2018
 
2017
 
2016
 
 
2016
 
 
Expiration Date
 
 
(in millions)
 
 
(in millions)
 
 
 
Virginia Natural Gas
 
$
11

 
$
6

 
$
2

 
 
$
9

 
 
March 2019
Atlanta Gas Light
 
9

 
4

 
1

 
 
6

 
 
March 2020
Chattanooga Gas
 
1

 
1

 

 
 
1

 
 
March 2021
Total (*)
 
$
21

 
$
11

 
$
3

 
 
$
16

 
 
 
(*)
Payments made to Elizabethtown Gas, Elkton Gas, and Florida City Gas, which were sold in July 2018, were $14 million and $12 million for the successor years ended December 31, 2018 and 2017 , respectively, $3 million for the successor period of July 1, 2016 through December 31, 2016 , and $13 million for the predecessor period of January 1, 2016 through June 30, 2016 . See Note 15 to the financial statements under " Southern Company Gas " for additional information on these dispositions.
energySMART
The Illinois Commission approved Nicor Gas' energySMART program, which includes energy efficiency program offerings and therm reduction goals. Through December 31, 2017, Nicor Gas spent $107 million of the initial authorized expenditure of $113 million . A new program began on January 1, 2018, with an additional authorized expenditure of $160 million through 2021. Through December 31, 2018, Nicor Gas had spent $29 million .
Unrecognized Ratemaking Amounts
The following table illustrates Southern Company Gas' authorized ratemaking amounts that are not recognized on its balance sheets. These amounts are primarily composed of an allowed equity rate of return on assets associated with certain regulatory infrastructure programs. These amounts will be recognized as revenues in Southern Company Gas' financial statements in the periods they are billable to customers, the majority of which will be recovered by 2025.
 
December 31, 2018
 
December 31, 2017
 
(in millions)
Atlanta Gas Light
$
95

 
$
104

Virginia Natural Gas
11

 
11

Nicor Gas
4

 
2

Total
$
110

 
$
117

Income Tax Matters
Federal Tax Reform Legislation
In December 2017, the Tax Reform Legislation was signed into law and became effective on January 1, 2018. The Tax Reform Legislation, among other things, reduced the federal corporate income tax rate to 21%, retained normalization provisions for public utility property and existing renewable energy incentives, and repealed the corporate alternative minimum tax. In addition, under the Tax Reform Legislation, net operating losses (NOL) generated after December 31, 2017 can no longer be carried back to previous tax years but can be carried forward indefinitely, with utilization limited to 80% of taxable income of the subsequent tax year. The projected reduction of Southern Company's consolidated income tax liability resulting from the tax rate reduction

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also delays the expected utilization of existing tax credit carryforwards. See Note 10 to the financial statements for information on Southern Company's joint consolidated income tax allocation agreement.
Following the enactment of the Tax Reform Legislation, the SEC staff issued Staff Accounting Bulletin 118 – "Income Tax Accounting Implications of the Tax Cuts and Jobs Act" (SAB 118), which provided for a measurement period of up to one year from the enactment date to complete accounting under GAAP for the tax effects of the legislation. Due to the complex and comprehensive nature of the enacted tax law changes and their application under GAAP, Southern Company Gas considered all amounts recorded in the financial statements as a result of the Tax Reform Legislation "provisional" as discussed in SAB 118 and subject to revision prior to filing its 2017 tax return in the fourth quarter 2018. Southern Company Gas recognized tax benefits of $3 million and tax expense of $93 million in 2018 and 2017, respectively, for a total net tax expense of $90 million as a result of the Tax Reform Legislation. In addition, in total, Southern Company Gas recorded a $781 million increase in regulatory liabilities as a result of the Tax Reform Legislation and $4 million of stranded excess deferred tax balances in AOCI at December 31, 2017 were adjusted through retained earnings in 2018. As of December 31, 2018, Southern Company Gas considered the measurement of impacts from the Tax Reform Legislation on deferred income tax assets and liabilities, primarily due to the impact of the reduction of the corporate income tax rate, to be complete.
However, the IRS continues to issue regulations that provide further interpretation and guidance on the law and each state's adoption of the provisions contained in the Tax Reform Legislation remains uncertain. In addition, the regulatory treatment of certain impacts of the Tax Reform Legislation is subject to the discretion of the FERC and the relevant state regulatory bodies. The ultimate impact of these matters cannot be determined at this time. See Note 2 to the financial statements under "Southern Company Gas – Rate Proceedings " for additional information on the natural gas distribution utilities' rate filings to reflect the impacts of the Tax Reform Legislation. Also see FINANCIAL CONDITION AND LIQUIDITY – "Credit Rating Risk" herein and Note 10 to the financial statements under " Current and Deferred Income Taxes " for additional information.
Bonus Depreciation
Under the Tax Reform Legislation, projects with binding contracts prior to September 28, 2017 and placed in service after September 27, 2017 remain eligible for bonus depreciation under the PATH Act. The PATH Act allowed for 50% bonus depreciation for 2015 through 2017, 40% bonus depreciation for 2018, and 30% bonus depreciation for 2019 and certain long-lived assets placed in service in 2020. Based on provisional estimates, bonus depreciation is expected to result in positive cash flows of approximately $40 million for the 2018 tax year and approximately $20 million for the 2019 tax year. See Note 10 to the financial statements under "Current and Deferred Income Taxes" for additional information. The ultimate outcome of this matter cannot be determined at this time.
Other Matters
Southern Company Gas is involved in various other matters being litigated and regulatory matters that could affect future earnings. In addition, Southern Company Gas is subject to certain claims and legal actions arising in the ordinary course of business.
Southern Company Gas is involved in litigation relating to an incident that occurred in one of its prior service territories that resulted in several deaths, injuries, and property damage. Southern Company Gas has resolved all claims for personal injuries or death, but it is continuing to defend litigation seeking to recover alleged property damages. Southern Company Gas has insurance that provides full coverage of the expected financial exposure in excess of $11 million per incident. During the successor period ended December 31, 2016, Southern Company Gas recorded reserves for substantially all of its potential exposure from these cases.
The ultimate outcome of this matter and such pending or potential litigation or regulatory matters cannot be predicted at this time; however, for current proceedings not specifically reported herein or in Notes 2 and 3 to the financial statements, management does not anticipate that the ultimate liabilities, if any, arising from such current proceedings would have a material effect on Southern Company Gas' financial statements. See Notes 2 and 3 to the financial statements for a discussion of various other contingencies, regulatory matters, and other matters being litigated which may affect future earnings potential.
Southern Company Gas owns a 50% interest in a LNG liquefaction and storage facility in Jacksonville, Florida, which was placed in service in October 2018. The facility, outfitted with a 2.0 million gallon storage tank with the capacity to produce in excess of 120,000 gallons of LNG per day, is not expected to have a material impact on Southern Company Gas' 2019 financial statements.
A wholly-owned subsidiary of Southern Company Gas owns and operates a natural gas storage facility consisting of two salt dome caverns in Louisiana. Periodic integrity tests are required in accordance with rules of the Louisiana Department of Natural Resources (DNR). In August 2017, in connection with an ongoing integrity project, updated seismic mapping indicated the proximity of one of the caverns to the edge of the salt dome may be less than the required minimum and could result in Southern

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Company Gas retiring the cavern early. At December 31, 2018, the facility's property, plant, and equipment had a net book value of $109 million, of which the cavern itself represents approximately 20%. A potential early retirement of this cavern is dependent upon several factors including compliance with an order from the Louisiana DNR detailing the requirements to place the cavern back in service, which includes, among other things, obtaining core samples to determine the composition of the sheath surrounding the edge of the salt dome.
The cavern continues to maintain its pressures and overall structural integrity. Southern Company Gas intends to monitor the cavern and comply with the Louisiana DNR order through 2020 and place the cavern back in service in 2021. These events were considered in connection with Southern Company Gas' annual long-lived asset impairment analysis, which determined there was no impairment as of December 31, 2018. Any changes in results of monitoring activities, rates at which expiring capacity contracts are re-contracted, timing of placing the cavern back in service, or Louisiana DNR requirements could trigger impairment. Further, early retirement of the cavern could trigger impairment of other long-lived assets associated with the natural gas storage facility. The ultimate outcome of this matter cannot be determined at this time, but could have a material impact on Southern Company Gas' financial statements.
Effective January 1, 2018, Southern Company Gas conformed its paid time off policy to align with Southern Company. Under the new policy, paid time off days are vested by the employee on the first day of each year and will continue to be recovered through rates on an as-paid basis. As a result, Southern Company Gas accrued $21 million as of January 1, 2018, of which $9 million was recorded as regulatory assets by the natural gas distribution utilities. See Note 2 to the financial statements under " Southern Company Gas " for additional information.
ACCOUNTING POLICIES
Application of Critical Accounting Policies and Estimates
Southern Company Gas prepares its financial statements in accordance with GAAP. Significant accounting policies are described in Notes 1 , 5 , and 6 to the financial statements. In the application of these policies, certain estimates are made that may have a material impact on Southern Company Gas' results of operations and related disclosures. Different assumptions and measurements could produce estimates that are significantly different from those recorded in the financial statements. Senior management has reviewed and discussed the following critical accounting policies and estimates with the Audit Committee of Southern Company's Board of Directors.
Utility Regulation
The natural gas distribution utilities comprised approximately 82% of Southern Company Gas' total operating revenues for 2018 and are subject to rate regulation by their respective state regulatory agencies, which set the rates utilities are permitted to charge customers based on allowable costs, including a reasonable ROE. As a result, the natural gas distribution utilities apply accounting standards which require the financial statements to reflect the effects of rate regulation. Through the ratemaking process, the regulators may require the inclusion of costs or revenues in periods different than when they would be recognized by a non-regulated company. This treatment may result in the deferral of expenses and the recording of related regulatory assets based on anticipated future recovery through rates or the deferral of gains or creation of liabilities and the recording of related regulatory liabilities. The application of the accounting standards has a further effect on Southern Company Gas' financial statements as a result of the estimates of allowable costs used in the ratemaking process. These estimates may differ from those actually incurred by the natural gas distribution utilities; therefore, the accounting estimates inherent in specific costs such as depreciation and pension and other postretirement benefits have less of a direct impact on Southern Company Gas' results of operations and financial condition than they would on a non-regulated company.
As reflected in Note 2 to the financial statements under " Southern Company Gas Regulatory Assets and Liabilities ," significant regulatory assets and liabilities have been recorded. Management reviews the ultimate recoverability of these regulatory assets and any requirement to refund these regulatory liabilities based on applicable regulatory guidelines and GAAP. However, adverse legislative, judicial, or regulatory actions could materially impact the amounts of such regulatory assets and liabilities and could adversely impact Southern Company Gas' financial statements.
Accounting for Income Taxes
The consolidated income tax provision and deferred income tax assets and liabilities, as well as any unrecognized tax benefits and valuation allowances, require significant judgment and estimates. These estimates are supported by historical tax return data, reasonable projections of taxable income, and interpretations of applicable tax laws and regulations across multiple taxing jurisdictions. The effective tax rate reflects the statutory tax rates and calculated apportionments for the many states in which Southern Company Gas operates.

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On behalf of Southern Company Gas, Southern Company files a consolidated federal income tax return and various state income tax returns, some of which are combined or unitary. Under a joint consolidated income tax allocation agreement, each Southern Company subsidiary's current and deferred tax expense is computed on a stand-alone basis and no subsidiary is allocated more current expense than would be paid if it filed a separate income tax return. Certain deductions and credits can be limited at the consolidated or combined level resulting in NOL and tax credit carryforwards that would not otherwise result on a stand-alone basis. Utilization of NOL carryforwards and the assessment of valuation allowances are based on significant judgment and extensive analysis of Southern Company Gas', as well as Southern Company's, current financial position and result of operations, including currently available information about future years, to estimate when future taxable income will be realized.
Current and deferred state income tax liabilities and assets are estimated based on laws of multiple states that determine the income to be apportioned to their jurisdictions. States utilize various formulas to calculate the apportionment of taxable income, primarily using sales, assets, or payroll within the jurisdiction compared to the consolidated totals. In addition, each state varies as to whether a stand-alone, combined, or unitary filing methodology is required. The calculation of deferred state taxes considers apportionment factors and filing methodologies that are expected to apply in future years. The apportionments and methodologies which are ultimately finalized in a manner inconsistent with expectations could have a material effect on Southern Company Gas' financial statements.
Given the significant judgment involved in estimating NOL carryforwards and tax credit carryforwards and multi-state apportionments, Southern Company Gas considers state deferred income tax liabilities and assets to be critical accounting estimates.
Assessment of Assets
Goodwill
Southern Company Gas does not amortize its goodwill, but tests it annually for impairment at the reporting unit level during the fourth quarter or more frequently if impairment indicators arise. These indicators include, but are not limited to, a significant change in operating performance, the business climate, legal or regulatory factors, or a planned sale or disposition of a significant portion of the business. A reporting unit is the operating segment, or a business one level below the operating segment (a component), if discrete financial information is prepared and regularly reviewed by management. Components are aggregated if they have similar economic characteristics.
As part of Southern Company Gas' impairment test, Southern Company Gas may perform an initial qualitative assessment to determine whether it is more likely than not that the fair value of each reporting unit is less than its carrying amount before applying the quantitative goodwill impairment test. If Southern Company Gas elects to perform the qualitative assessment, it evaluates relevant events and circumstances, including but not limited to, macroeconomic conditions, industry and market conditions, cost factors, financial performance, entity specific events, and events specific to each reporting unit. If Southern Company Gas determines that it is more likely than not that the fair value of a reporting unit is less than its carrying amount, or it elects not to perform a qualitative assessment, it compares the fair value of the reporting unit to its carrying value to determine if the fair value is greater than its carrying value. Under ASU No. 2017-04, which was adopted effective January 1, 2018, any goodwill impairment loss will be measured as the excess of a reporting unit's carrying amount over its fair value.
For the 2018 and 2016 annual impairment tests, Southern Company Gas performed the qualitative assessment and determined that it was more likely than not that the fair value of all of its reporting units with goodwill exceeded their carrying amounts, and therefore no quantitative analysis was required. For the 2017 annual impairment test, Southern Company Gas performed the quantitative assessment, which resulted in the fair value of all of its reporting units that have goodwill exceeding their carrying value. In the first quarter 2018, Southern Company Gas recorded a $42 million impairment charge in contemplation of the sale of Pivotal Home Solutions.
As the determination of an asset's fair value and useful life involves management making certain estimates and because these estimates form the basis for the determination of whether or not an impairment charge should be recorded, Southern Company Gas considers these estimates to be critical accounting estimates.
See Note 1 to the financial statements under " Recently Adopted Accounting Standards Other " for information on Southern Company Gas' adoption of ASU No. 2017-04.
Long-Lived Assets
Southern Company Gas depreciates or amortizes its long-lived and intangible assets over their estimated useful lives. Southern Company Gas assesses its long-lived and intangible assets for impairment whenever events or changes in circumstances indicate that an asset's carrying amount may not be recoverable. When such events or circumstances are present, Southern Company Gas

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assesses the recoverability of long-lived assets by determining whether the carrying value will be recovered through the expected future cash flows. Impairment is indicated if the carrying amount of a long-lived asset exceeds the sum of the undiscounted future cash flows expected to result from the use and eventual disposition of the asset. If impairment is indicated, Southern Company Gas records an impairment loss equal to the difference between the carrying value and the fair value of the long-lived asset.
As the determination of the expected future cash flows generated from an asset, an asset's fair value, and useful life involves management making certain estimates and because these estimates form the basis for the determination of whether or not an impairment charge should be recorded, Southern Company Gas considers these estimates to be critical accounting estimates.
See Notes 2 and 3 to the financial statements under "FERC Matters – Southern Company Gas" and " Other Matters Southern Company Gas ," respectively, for information on certain assets recently evaluated for impairment.
Derivatives and Hedging Activities
Determining whether a contract meets the definition of a derivative instrument, contains an embedded derivative requiring bifurcation, or qualifies for hedge accounting treatment is complex. The treatment of a single contract may vary from period to period depending upon accounting elections, changes in Southern Company Gas' assessment of the likelihood of future hedged transactions, or new interpretations of accounting guidance. As a result, judgment is required in determining the appropriate accounting treatment. In addition, the estimated fair value of derivative instruments may change significantly from period to period depending upon market conditions, and changes in hedge effectiveness may impact the accounting treatment.
Derivative instruments (including certain derivative instruments embedded in other contracts) are recorded on the balance sheets as either assets or liabilities measured at their fair value. If the transaction qualifies for, and is designated as, a normal purchase or normal sale, it is exempted from fair value accounting treatment and is, instead, subject to traditional accrual accounting. Southern Company Gas utilizes market data or assumptions that market participants would use in pricing the derivative asset or liability, including assumptions about risk and the risks inherent in the inputs of the valuation technique.
Changes in the derivatives' fair value are recognized concurrently in earnings unless specific hedge accounting criteria are met. If the derivatives meet those criteria, derivative gains and losses offset related results of the hedged item in the income statement in the case of a fair value hedge, or gains and losses are recorded in OCI on the balance sheets until the hedged transaction affects earnings in the case of a cash flow hedge. Additionally, a company is required to formally designate a derivative as a hedge as well as document and assess the effectiveness of derivatives associated with transactions that receive hedge accounting treatment.
Nicor Gas utilizes derivative instruments to hedge the price risk for the purchase of natural gas for customers. These derivatives are reflected at fair value and are not designated as accounting hedges. Realized gains or losses on such instruments are included in the cost of gas delivered and are passed through directly to customers, subject to review by the applicable state regulatory agencies, and therefore have no direct impact on earnings. Unrealized changes in the fair value of these derivative instruments are deferred as regulatory assets or liabilities. Prior to its disposition, Elizabethtown Gas utilized the same policy.
Southern Company Gas uses derivative instruments primarily to reduce the impact to its results of operations due to the risk of changes in the price of natural gas and to a lesser extent Southern Company Gas hedges against warmer-than-normal weather and interest rates. The fair value of natural gas derivative instruments used to manage exposure to changing natural gas prices reflects the estimated amounts that Southern Company Gas would receive or pay to terminate or close the contracts at the reporting date, taking into account the current unrealized gains or losses on open contracts. For derivatives utilized at gas marketing services and wholesale gas services that are not designated as accounting hedges, changes in fair value are reported as gains or losses in Southern Company Gas' results of operations in the period of change. Gas marketing services records derivative gains or losses arising from cash flow hedges in OCI and reclassifies them into earnings in the same period that the underlying hedged item is recognized in earnings.
Southern Company Gas classifies derivative assets and liabilities based on the lowest level of input that is significant to the fair value measurement. The assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy. The determination of the fair value of the derivative instruments incorporates various required factors. These factors include:
the creditworthiness of the counterparties involved and the impact of credit enhancements (such as cash deposits and letters of credit);
events specific to a given counterparty; and
the impact of Southern Company Gas' nonperformance risk on its liabilities.

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If there is a significant change in the underlying market prices or pricing assumptions Southern Company Gas uses in pricing its derivative assets or liabilities, Southern Company Gas may experience a significant impact on its financial position, results of operations, and cash flows. See Note 14 to the financial statements for additional information.
Given the assumptions used in pricing the derivative asset or liability, Southern Company Gas considers the valuation of derivative assets and liabilities a critical accounting estimate. See FINANCIAL CONDITION AND LIQUIDITY – "Market Price Risk" herein for more information.
Pension and Other Postretirement Benefits
Southern Company Gas' calculation of pension and other postretirement benefits expense is dependent on a number of assumptions. These assumptions include discount rates, healthcare cost trend rates, expected long-term return on plan assets, mortality rates, expected salary and wage increases, and other factors. Components of pension and other postretirement benefits expense include interest and service cost on the pension and other postretirement benefit plans, expected return on plan assets, and amortization of certain unrecognized costs and obligations. Actual results that differ from the assumptions utilized are accumulated and amortized over future periods and, therefore, generally affect recognized expense and the recorded obligation in future periods. While Southern Company Gas believes that the assumptions used are appropriate, differences in actual experience or significant changes in assumptions would affect its pension and other postretirement benefit costs and obligations.
Key elements in determining Southern Company Gas' pension and other postretirement benefit expense are the expected long-term return on plan assets and the discount rate used to measure the benefit plan obligations and the periodic benefit plan expense for future periods. The expected long-term return on pension and other postretirement benefit plan assets is based on Southern Company's investment strategy, historical experience, and expectations for long-term rates of return that consider external actuarial advice. Southern Company determines the long-term return on plan assets by applying the long-term rate of expected returns on various asset classes to Southern Company's target asset allocation. For purposes of determining Southern Company Gas' liability related to the pension and other postretirement benefit plans, Southern Company discounts the future related cash flows using a single-point discount rate developed from the weighted average of market-observed yields for high quality fixed income securities with maturities that correspond to expected benefit payments.
A 25 basis point change in any significant assumption (discount rate, salary increases, or long-term rate of return on plan assets) would result in a $3 million or less change in total annual benefit expense, a $30 million or less change in the projected obligation for the pension plan, and a $6 million or less change in the projected obligation for other post retirement benefit plans.
See Note 11 to the financial statements for additional information regarding pension and other postretirement benefits.
Contingent Obligations
Southern Company Gas is subject to a number of federal and state laws and regulations as well as other factors and conditions that subject it to environmental, litigation, and other risks. See FUTURE EARNINGS POTENTIAL herein and Notes 2 and 3 to the financial statements for more information regarding certain of these contingencies. Southern Company Gas periodically evaluates its exposure to such risks and records reserves for those matters where a non-tax-related loss is considered probable and reasonably estimable. The adequacy of reserves can be significantly affected by external events or conditions that can be unpredictable; thus, the ultimate outcome of such matters could materially affect Southern Company Gas' results of operations, cash flows, or financial condition.
Recently Issued Accounting Standards
See Note 1 to the financial statements under " Recently Adopted Accounting Standards " for additional information.
In 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 requires lessees to recognize on the balance sheet a lease liability and a right-of-use asset for all leases. ASU 2016-02 also changes the recognition, measurement, and presentation of expense associated with leases and provides clarification regarding the identification of certain components of contracts that would represent a lease. The accounting required by lessors is relatively unchanged . ASU 2016-02 is effective for fiscal years beginning after December 15, 2018 and Southern Company Gas adopted the new standard effective January 1, 2019.
Southern Company Gas elected the transition methodology provided by ASU No. 2018-11, Leases (Topic 842): Targeted Improvements , whereby the requirements of ASU 2016-02 are applied on a prospective basis as of the adoption date of January 1, 2019, without restating prior periods. Southern Company Gas elected the package of practical expedients provided by ASU 2016-02 that allows prior determinations of whether existing contracts are, or contain, leases and the classification of existing leases to continue without reassessment. Additionally, Southern Company Gas applied the use-of-hindsight practical expedient in determining lease terms as of the date of adoption and elected the practical expedient that allows existing land easements not previously accounted for as leases not to be reassessed. Southern Company Gas also made accounting policy elections to account

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for short-term leases in all asset classes as off-balance sheet leases and combined lease and non-lease components in the computations of lease obligations and right-of-use assets for most asset classes.
Southern Company Gas completed the implementation of a new application to track and account for its leases and updated its internal controls and accounting policies to support the accounting for leases under ASU 2016-02. Southern Company Gas completed its lease inventory and determined its most significant leases involve real estate and fleet vehicles. In the first quarter 2019, the adoption of ASU 2016-02 resulted in recording lease liabilities and right-of-use assets on Southern Company Gas' balance sheet each totaling $86 million , with no impact on Southern Company Gas' statement of income.
FINANCIAL CONDITION AND LIQUIDITY
Overview
Southern Company Gas' financial condition remained stable at December 31, 2018 . Southern Company Gas' cash requirements primarily consist of funding ongoing operations, common stock dividends, capital expenditures, investments in unconsolidated subsidiaries, and debt maturities. Capital expenditures and other investing activities include investments to meet projected long-term demand requirements, to maintain existing natural gas distribution systems as well as to update and expand these systems, and to comply with environmental regulations. Operating cash flows provide a substantial portion of Southern Company Gas' cash needs. For the three-year period from 2019 through 2021 , Southern Company Gas' projected common stock dividends, capital expenditures, and debt maturities are expected to exceed operating cash flows. Southern Company Gas plans to finance future cash needs in excess of its operating cash flows primarily through external securities issuances, equity contributions from Southern Company, and borrowings from financial institutions. Southern Company Gas plans to use commercial paper to manage seasonal variations in operating cash flows and other working capital needs. Southern Company Gas intends to continue to monitor its access to short-term and long-term capital markets as well as its bank credit arrangements to meet future capital and liquidity needs. See " Sources of Capital ," " Financing Activities ," and " Capital Requirements and Contractual Obligations " herein for additional information.
By regulation, Nicor Gas is restricted, to the extent of its retained earnings balance, in the amount it can dividend or loan to affiliates and is not permitted to make money pool loans to affiliates. At December 31, 2018 , the amount of subsidiary retained earnings restricted to dividend totaled $814 million . This restriction did not impact Southern Company Gas' ability to meet its cash obligations, nor does management expect such restriction to materially impact Southern Company Gas' ability to meet its currently anticipated cash obligations.
Southern Company Gas' investments in the qualified pension plan decreased in value at December 31, 2018 as compared to December 31, 2017 . There were no voluntary contributions to the qualified pension plan in 2018 and no mandatory contributions to its qualified pension plan are anticipated during 2019 . See Note 11 to the financial statements for additional information.
Net cash provided from operating activities in the successor year ended 2018 totaled $764 million , a decrease of $117 million from 2017. The decrease was primarily due to higher income tax payments as a result of net taxable gains from the Southern Company Gas Dispositions, partially offset by increased volumes of natural gas sold during 2018 as a result of colder weather compared to 2017. Net cash provided from operating activities totaled $881 million for 2017, primarily due to earnings and the timing of cash receipts for the sale of natural gas inventory and vendor payments. Net cash used for operating activities was $327 million for the successor period of July 1, 2016 through December 31, 2016 , primarily due to a $125 million voluntary pension contribution, a $35 million payment for the settlement of an interest rate swap, and less cash due to the timing of collecting receivables and disbursing payables. Due to the seasonal nature of its business, Southern Company Gas typically reports negative cash flows from operating activities in the second half of the year. Net cash provided from operating activities was $1.1 billion for the predecessor period of January 1, 2016 through June 30, 2016 , primarily due to low volumes of natural gas sales and changes in natural gas inventory as a result of warmer weather and the timing of recovery of related gas costs and weather normalization adjustments from customers.
Net cash provided from investing activities for the successor year ended 2018 totaled $1.0 billion and was primarily due to the $2.6 billion proceeds from the Southern Company Gas Dispositions, partially offset by gross property additions primarily related to utility capital expenditures and pre-approved rider and infrastructure investments recovered through replacement programs at gas distribution operations as well as capital contributed to equity method pipeline investments partially offset by capital returned from equity method pipeline investments. Net cash used for investing activities totaled $1.6 billion for the successor year ended 2017, which reflected $1.5 billion in capital expenditures primarily due to gross property additions for infrastructure replacement programs at gas distribution operations and $145 million in capital contributions to equity method pipeline investments, partially offset by $80 million in capital returned from equity method pipeline investments. Net cash used for investing activities was $2.1 billion for the successor period of July 1, 2016 through December 31, 2016 , which reflected

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$1.4 billion primarily related to Southern Company Gas' acquisition of the 50% interest in SNG, and $632 million in capital expenditures. Net cash used for investing activities was $556 million for the predecessor period of January 1, 2016 through June 30, 2016 which primarily related to capital expenditures. See Note 7 to the financial statements under "Southern Company Gas" and Note 15 to the financial statements under "Southern Company Gas – Investment in SNG" for additional information.
Net cash used for financing activities for the successor year ended 2018 of $1.8 billion included payments of common stock dividends to Southern Company, return of capital to Southern Company, redemptions of gas facility revenue bonds and senior notes, and repayments of commercial paper borrowings and long-term debt, partially offset by debt issuances and capital contributions from Southern Company. Net cash provided from financing activities totaled $741 million for 2017, primarily due to $850 million in debt issuances, $262 million in net additional commercial paper borrowings, and $103 million in capital contributions from Southern Company, partially offset by $443 million in common stock dividend payments to Southern Company and $22 million in repayment of long-term debt. Net cash provided from financing activities was $2.4 billion for the successor period of July 1, 2016 through December 31, 2016 , which reflected $1.1 billion of capital contributions from Southern Company, primarily used to fund Southern Company Gas' investment in SNG, $1.1 billion in net additional commercial paper borrowings, partially offset by $160 million for the purchase of the 15% noncontrolling ownership interest in SouthStar, and $900 million in proceeds from debt issuances, partially offset by $420 million in debt payments. Net cash used for financing activities was $558 million for the predecessor period of January 1, 2016 through June 30, 2016 , primarily due to $896 million in net repayment of commercial paper borrowings and $125 million in repayment of long-term debt, partially offset by $600 million in debt issuances. See Note 7 to the financial statements under "Southern Company Gas" and Note 15 to the financial statements under "Southern Company Gas – Investment in SNG" for additional information.
Significant balance sheet changes at December 31, 2018 include $2.8 billion and $403 million in total assets and liabilities sold, respectively, associated with the Southern Company Gas Dispositions as described in Note 15 to the financial statements herein under "Southern Company Gas." After adjusting for these changes, other significant balance sheet changes included an increase of $1.0 billion in total property, plant, and equipment primarily due to capital expenditures for infrastructure replacement programs, a decrease of $73 million in accumulated deferred income tax liabilities primarily due to the change in the federal corporate income tax rate, partially offset by tax depreciation related to infrastructure assets placed in service, as well as the impacts of State of Illinois tax legislation, and a decrease of $108 million in long-term debt (including securities due within one year), primarily due to $200 million redemption of gas facility revenue bonds and $155 million in repayments of long-term debt, partially offset by the issuance of $300 million of first mortgage bonds at Nicor Gas. Other significant balance sheet changes include a decrease of $868 million in notes payable primarily related to a decrease in commercial paper borrowings of $840 million at Southern Company Gas Capital and $28 million at Nicor Gas. See FUTURE EARNINGS POTENTIAL – " Income Tax Matters " and FINANCIAL CONDITION AND LIQUIDITY – "Financing Activities" herein and Notes 8 and 10 to the financial statements for additional information.
Sources of Capital
Southern Company Gas plans to obtain the funds to meet its future capital needs from sources similar to those used in the past, which were primarily from operating cash flows, external securities issuances, borrowings from financial institutions, and equity contributions from Southern Company. However, the amount, type, and timing of any future financings, if needed, depend upon prevailing market conditions, regulatory approval, and other factors. With respect to the public offering of securities, Southern Company Gas (excluding its subsidiaries) and Southern Company Gas Capital file registration statements with the SEC under the Securities Act of 1933, as amended. The issuance of securities by Nicor Gas is generally subject to the approval of the Illinois Commission.
Southern Company Gas obtains separate financing without credit support from any affiliate in the Southern Company system. See Note 8 to the financial statements under " Bank Credit Arrangements " for additional information. The Southern Company system does not maintain a centralized cash or money pool. Therefore, except as described below, funds of Southern Company Gas are not commingled with funds of any other company in the Southern Company system.
Southern Company Gas maintains commercial paper programs at Southern Company Gas Capital and Nicor Gas that consist of short-term, unsecured promissory notes. Nicor Gas' commercial paper program supports its working capital needs as Nicor Gas is not permitted to make money pool loans to affiliates. All of Southern Company Gas' other subsidiaries benefit from Southern Company Gas Capital's commercial paper program.
At December 31, 2018 , Southern Company Gas' current liabilities exceeded current assets by $469 million , primarily as a result of $650 million in notes payable and $357 million of securities due within one year. Southern Company Gas' current liabilities frequently exceed current assets because of commercial paper borrowings used to fund daily operations, scheduled maturities of long-term debt, and significant seasonal fluctuations in cash needs.

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At December 31, 2018 , Southern Company Gas had $64 million of cash and cash equivalents. Committed credit arrangements with banks at December 31, 2018 were as follows:
Company
 
Expires 2022
 
Unused
 
 
(millions)
Southern Company Gas Capital (a)
 
$
1,400

 
$
1,395

Nicor Gas
 
500

 
500

Total (b)
 
$
1,900

 
$
1,895

(a) Southern Company Gas guarantees the obligations of Southern Company Gas Capital.
(b) Pursuant to the credit arrangement, the allocations between Southern Company Gas Capital and Nicor Gas may be adjusted.
See Note 8 to the financial statements under " Bank Credit Arrangements " for additional information.
The multi-year credit arrangement of Southern Company Gas Capital and Nicor Gas (Facility) contains a covenant that limits the debt levels and contains a cross-acceleration provision to other indebtedness (including guarantee obligations) of the applicable company. Such cross-acceleration provision to other indebtedness would trigger an event of default of the applicable company if Southern Company Gas or Nicor Gas defaulted on indebtedness, the payment of which was then accelerated. At December 31, 2018 , both companies were in compliance with such covenant. The Facility does not contain a material adverse change clause at the time of borrowings.
Subject to applicable market conditions, the applicable company expects to renew or replace the Facility as needed, prior to expiration. In connection therewith, the applicable company may extend the maturity dates and/or increase or decrease the lending commitments thereunder. A portion of unused credit with banks provides liquidity support to Southern Company Gas.
Southern Company Gas has substantial cash flow from operating activities and access to capital markets, including the commercial paper programs, and financial institutions to meet liquidity needs. Southern Company Gas makes short-term borrowings primarily through commercial paper programs that have the liquidity support of the committed bank credit arrangements described above. Short-term borrowings are included in notes payable in the balance sheets.

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Details of short-term borrowings were as follows:
 
 
Short-term Debt at the End of the Period
 
Short-term Debt During the Period (*)
 
 
Amount
Outstanding
 
Weighted Average Interest Rate
 
Average
Amount Outstanding
 
Weighted Average Interest Rate
 
Maximum
Amount
Outstanding
 
 
(in millions)
 
 
 
(in millions)
 
 
 
(in millions)
Successor – December 31, 2018:
 
 
 
 
 
 
 
 
 
 
Commercial paper:
 
 
 
 
 
 
 
 
 
 
Southern Company Gas Capital
 
$
403

 
3.05
%
 
$
489

 
2.25
%
 
$
1,261

Nicor Gas
 
247

 
2.98
%
 
123

 
2.16
%
 
275

Short-term bank debt:
 
 
 
 
 
 
 
 
 
 
Southern Company Gas Capital
 

 
%
 
31

 
2.72
%
 
276

Total
 
$
650

 
3.03
%
 
$
643

 
2.25
%
 
 
 
 
 
 
 
 
 
 
 
 
 
Successor – December 31, 2017:
 
 
 
 
 
 
 
 
 
 
Commercial paper:
 
 
 
 
 
 
 
 
 
 
Southern Company Gas Capital
 
$
1,243

 
1.73
%
 
$
723

 
1.40
%
 
$
1,243

Nicor Gas
 
275

 
1.83
%
 
176

 
1.12
%
 
525

Total
 
$
1,518

 
1.75
%
 
$
899

 
1.35
%
 
 
 
 
 
 
 
 
 
 
 
 
 
Successor – December 31, 2016:
 
 
 
 
 
 
 
 
 
 
Commercial paper:
 
 
 
 
 
 
 
 
 
 
Southern Company Gas Capital
 
$
733

 
1.09
%
 
$
461

 
0.79
%
 
$
770

Nicor Gas
 
524

 
0.95
%
 
309

 
0.67
%
 
587

Total
 
$
1,257

 
1.03
%
 
$
770

 
0.74
%
 
 
(*)
Average and maximum amounts are based upon daily balances during the 12-month periods.
Southern Company Gas believes that the need for working capital can be adequately met by utilizing commercial paper programs, lines of credit, and operating cash flows.
Financing Activities
The long-term debt on Southern Company Gas' balance sheets includes both principal and non-principal components. At December 31, 2018 , the non-principal components totaled $456 million , including the amount attributable to long-term debt due within one year, which consisted of the unamortized portions of the fair value adjustment recorded in purchase accounting, debt premiums, debt discounts, and debt issuance costs.
In December 2016, Southern Company Gas executed intercompany promissory notes to further allocate interest expense to its reportable segments that previously remained in the "all other" segment. These intercompany promissory notes allow Southern Company Gas to calculate net income, which is its performance measure subsequent to the Merger, at the segment level that incorporates the full impact of interest costs.
Except as otherwise described herein, Southern Company Gas and its subsidiaries used the proceeds of debt issuances for their redemptions and maturities, to pay common stock dividends, to repay short-term indebtedness, for capital expenditures, and for general corporate purposes, including working capital.
In January 2018, Southern Company Gas issued a floating rate promissory note to Southern Company in an aggregate principal amount of $100 million bearing interest based on one-month LIBOR. In March 2018, Southern Company Gas repaid this promissory note.
Prior to its sale, in the second quarter 2018, Pivotal Utility Holdings caused $200 million aggregate principal amount of gas facility revenue bonds to be redeemed. Also in the second quarter 2018, Pivotal Utility Holdings, as borrower, and Southern Company Gas, as guarantor, entered into a $181 million short-term delayed draw floating rate bank term loan bearing interest

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based on one-month LIBOR, which Pivotal Utility Holdings used to repay the gas facility revenue bonds. In July 2018, Pivotal Utility Holdings repaid this short-term loan.
In May 2018, Southern Company Gas Capital borrowed $95 million pursuant to a short-term uncommitted bank credit arrangement, guaranteed by Southern Company Gas, bearing interest at a rate agreed upon by Southern Company Gas Capital and the bank from time to time and payable on no less than 30 days' demand by the bank. In July 2018, Southern Company Gas Capital repaid this loan.
Nicor Gas issued $300 million aggregate principal amount of first mortgage bonds in a private placement, of which $100 million was issued in August 2018 and $200 million was issued in November 2018.
In October 2018, Southern Company Gas Capital repaid at maturity $155 million aggregate principal amount of 3.50% Series B Senior Notes.
In addition to any financings that may be necessary to meet capital requirements and contractual obligations, Southern Company Gas plans to continue, when economically feasible, a program to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit.
Credit Rating Risk
Southern Company Gas does not have any credit arrangements that would require material changes in payment schedules or terminations as a result of a credit rating downgrade.
There are certain contracts that could require collateral, but not accelerated payment, in the event of a credit rating change below BBB- and/or Baa3. These contracts are for physical gas purchases and sales and energy price risk management. The maximum potential collateral requirement under these contracts at December 31, 2018 was $30 million .
Generally, collateral may be provided by a Southern Company guaranty, letter of credit, or cash. Additionally, a credit rating downgrade could impact the ability of Southern Company Gas to access capital markets and would be likely to impact the cost at which it does so.
On September 28, 2018, Fitch assigned a negative rating outlook to the ratings of Southern Company and certain of its subsidiaries (including Southern Company Gas, Southern Company Gas Capital, and Nicor Gas).
As a result of the Tax Reform Legislation, certain financial metrics, such as the funds from operations to debt percentage, used by the credit rating agencies to assess Southern Company and its subsidiaries, including Southern Company Gas, may be negatively impacted. Southern Company Gas and its regulated subsidiaries have taken actions to mitigate the resulting impacts, which, among other alternatives, include adjusting capital structure. Absent actions by Southern Company and its subsidiaries that fully mitigate the impacts, Southern Company Gas', Southern Company Gas Capital's, and Nicor Gas' credit ratings could be negatively affected. The Georgia PSC's May 15, 2018 approval of a stipulation for Atlanta Gas Light's annual rate adjustment maintained the previously authorized earnings band and increased the equity ratio to address the negative cash flow and credit metric impacts of the Tax Reform Legislation. See Note 2 to the financial statements under "Southern Company Gas" for information on additional rate proceedings for Nicor Gas and Atlanta Gas Light expected to conclude in 2019.
Market Price Risk
Southern Company Gas is exposed to market risks, primarily commodity price risk, interest rate risk, and weather risk. Due to various cost recovery mechanisms, the natural gas distribution utilities of Southern Company Gas that sell natural gas directly to end-use customers have limited exposure to market volatility of natural gas prices. To manage the volatility attributable to these exposures, Southern Company Gas nets the exposures, where possible, to take advantage of natural offsets and enters into various derivative transactions for the remaining exposures pursuant to Southern Company Gas' policies in areas such as counterparty exposure and risk management practices. Southern Company Gas uses derivatives to buy and sell natural gas as well as for hedging purposes and mandates strict adherence to all applicable risk management policies. Derivative positions are monitored using techniques including, but not limited to, market valuation, value at risk, stress testing, and sensitivity analysis.
Certain natural gas distribution utilities of Southern Company Gas manage fuel-hedging programs implemented per the guidelines of their respective state regulatory agencies to hedge the impact of market fluctuations in natural gas prices for customers. For the weather risk associated with Nicor Gas, Southern Company Gas has a corporate weather hedging program that utilizes weather derivatives to reduce the risk of lower adjusted operating margins potentially resulting from significantly warmer-than-normal weather. In addition, certain non-regulated operations routinely utilize various types of derivative instruments to economically hedge certain commodity price and weather risks inherent in the natural gas industry. These instruments include a variety of exchange-traded and OTC energy contracts, such as forward contracts, futures contracts, options contracts, and swap agreements.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2018 Annual Report


Gas marketing services and wholesale gas services also actively manage storage positions through a variety of hedging transactions for the purpose of managing exposures arising from changing natural gas prices. These hedging instruments are used to substantially protect economic margins (as spreads between wholesale and retail natural gas prices widen between periods) and thereby minimize exposure to declining operating margins. Some of these economic hedge activities may not qualify, or may not be designated, for hedge accounting treatment. Southern Company Gas had no material change in market risk exposure for the year ended December 31, 2018 when compared to the year ended December 31, 2017 .
For the periods presented below, the changes in net fair value of derivative contracts were as follows:
 
Successor
 
 
Predecessor
 
Year Ended December 31, 2018
Year Ended December 31, 2017
July 1, 2016 through December 31, 2016
 
 
January 1, 2016
through
June 30,
2016
 
(in millions)
 
 
(in millions)
Contracts outstanding at beginning of period, assets (liabilities), net
$
(106
)
$
8

$
(54
)
 
 
$
75

Contracts realized or otherwise settled
66

(1
)
18

 
 
(77
)
Current period changes (a)
(127
)
(113
)
48

 
 
(82
)
Contracts outstanding at end of period, assets (liabilities), net
(167
)
(106
)
12

 
 
(84
)
Netting of cash collateral
277

193

62

 
 
120

Cash collateral and net fair value of contracts outstanding at end of period (b)
$
110

$
87

$
74

 
 
$
36

(a)
Current period changes also include the changes in fair value of new contracts entered into during the period, if any.
(b)
Net fair value of derivative contracts outstanding excludes premium and intrinsic value associated with weather derivatives of $8 million and $11 million at December 31, 2018 and 2017, respectively, and includes premium and intrinsic value associated with weather derivatives of $4 million at December 31, 2016 , and $5 million at June 30, 2016.
The net hedge volume of energy-related derivative contracts for natural gas positions at December 31, 2018 and 2017 were as follows:
 
 
2018
 
2017
 
 
mmBtu Volume
 
 
(in millions)
Commodity – Natural gas
 
120

 
300

Net Purchased / (Sold) Volume
 
120

 
300

Southern Company Gas' derivative contracts are comprised of both long and short natural gas positions. A long position is a contract to purchase natural gas, and a short position is a contract to sell natural gas. The volume presented above represents the net of long natural gas positions of 4.16 billion mmBtu and short natural gas positions of 4.04 billion mmBtu at December 31, 2018 and the net of long natural gas positions of 3.51 billion mmBtu and short natural gas positions of 3.21 billion mmBtu at December 31, 2017 .
Energy-related derivative contracts that are designated as regulatory hedges relate primarily to Southern Company Gas' fuel-hedging programs. Therefore, gains and losses are initially recorded as regulatory liabilities and assets, respectively, and then are included in cost of natural gas as the underlying gas is used in operations and ultimately recovered through the respective cost recovery clause. Certain other gains and losses on energy-related derivatives, designated as cash flow hedges (which are mainly used to hedge anticipated purchases and sales), are initially deferred in OCI before being recognized in income in the same period as the hedged transaction. Gains and losses on energy-related derivative contracts that are not designated or fail to qualify as hedges are recognized in the statements of income as incurred.
Some energy-related derivative contracts require physical delivery as opposed to financial settlement, and this type of derivative is both common and prevalent within the natural gas industry. When an energy-related derivative contract is settled physically, any cumulative unrealized gain or loss is reversed and the contract price is recognized in the respective line item representing the actual price of the underlying goods being delivered.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2018 Annual Report


Southern Company Gas uses OTC contracts that are not exchange traded but are fair valued using prices which are market observable, and thus fall into Level 2 of the fair value hierarchy. See Note 13 to the financial statements for further discussion of fair value measurements.
The maturities of the energy-related derivative contracts at December 31, 2018 were as follows:
 
 
 
Fair Value Measurements
 
 
 
December 31, 2018
 
 
 
Maturity
 
Total
Fair Value
 
Year 1 
 
Years 2 & 3
 
Years 4 & 5
 
(in millions)
Level 1 (a)
$
(179
)
 
$
(59
)
 
$
(86
)
 
$
(34
)
Level 2 (b)
12

 
37

 

 
(25
)
Fair value of contracts outstanding at end of period (c)
$
(167
)
 
$
(22
)
 
$
(86
)
 
$
(59
)
(a)
Valued using NYMEX futures prices.
(b)
Valued using basis transactions that represent the cost to transport natural gas from a NYMEX delivery point to the contract delivery point. These transactions are based on quotes obtained either through electronic trading platforms or directly from brokers.
(c)
Excludes cash collateral of $277 million as well as premium and associated intrinsic value associated with weather derivatives of $8 million at December 31, 2018 .
Value at Risk (VaR)
VaR is the maximum potential loss in portfolio value over a specified time period that is not expected to be exceeded within a given degree of probability. Southern Company Gas' VaR may not be comparable to that of other companies due to differences in the factors used to calculate VaR. Southern Company Gas' VaR is determined on a 95% confidence interval and a one-day holding period, which means that 95% of the time, the risk of loss in a day from a portfolio of positions is expected to be less than or equal to the amount of VaR calculated. The open exposure of Southern Company Gas is managed in accordance with established policies that limit market risk and require daily reporting of potential financial exposure to senior management. Because Southern Company Gas generally manages physical gas assets and economically protects its positions by hedging in the futures markets, Southern Company Gas' open exposure is generally mitigated. Southern Company Gas employs daily risk testing, using both VaR and stress testing, to evaluate the risk of its positions.
Southern Company Gas actively monitors open commodity positions and the resulting VaR and maintains a relatively small risk exposure as total buy volume is close to sell volume, with minimal open natural gas price risk. Based on a 95% confidence interval and employing a one-day holding period, SouthStar's portfolio of positions for all periods presented was immaterial.
For the periods presented below, wholesale gas services had the following VaRs:
 
Successor
 
 
Predecessor
 
Year Ended December 31, 2018
Year Ended December 31, 2017
July 1, 2016 through December 31, 2016
 
 
January 1, 2016 through June 30, 2016
 
(in millions)
 
 
(in millions)
Period end (*)
$
6.4

$
4.8

$
2.3

 
 
$
1.9

Average
3.7

2.0

2.0

 
 
2.0

High (*)
11.7

4.8

2.8

 
 
2.5

Low
1.2

1.0

1.4

 
 
1.6

(*)
Increases in VaR at December 31, 2018 and 2017 were driven by significant natural gas price increases in Sequent's key markets. The natural gas price increase in 2018 was driven by an industry-wide lower-than-normal natural gas storage inventory position and colder-than-normal weather in the middle of fourth quarter 2018. The natural gas price increase in 2017 was driven by colder-than-normal weather. As weather and natural gas prices moderated subsequent to December 31, 2018 and 2017, VaR reduced to a level consistent with December 31, 2016.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2018 Annual Report


Credit Risk
Gas Distribution Operations
Concentration of credit risk occurs at Atlanta Gas Light for amounts billed for services and other costs to its customers, which consist of 15 Marketers in Georgia. The credit risk exposure to Marketers varies seasonally, with the lowest exposure in the non-peak summer months and the highest exposure in the peak winter months. Marketers are responsible for the retail sale of natural gas to end-use customers in Georgia. The functions of the retail sale of gas include the purchase and sale of natural gas, customer service, billings, and collections. The provisions of Atlanta Gas Light's tariff allow Atlanta Gas Light to obtain credit security support in an amount equal to a minimum of two times a Marketer's highest month's estimated bill from Atlanta Gas Light. For 2018 , the four largest Marketers based on customer count, which includes SouthStar, accounted for 20% of Southern Company Gas' adjusted operating margin and 25% of gas distribution operations' adjusted operating margin.
Several factors are designed to mitigate Southern Company Gas' risks from the increased concentration of credit that has resulted from deregulation. In addition to the security support described above, Atlanta Gas Light bills intrastate delivery service to Marketers in advance rather than in arrears. Atlanta Gas Light accepts credit support in the form of cash deposits, letters of credit/surety bonds from acceptable issuers, and corporate guarantees from investment-grade entities. On a monthly basis, a management risk oversight committee reviews the adequacy of credit support coverage, credit rating profiles of credit support providers, and payment status of each Marketer. Southern Company Gas believes that adequate policies and procedures are in place to properly quantify, manage, and report on Atlanta Gas Light's credit risk exposure to Marketers.
Atlanta Gas Light also faces potential credit risk in connection with assignments of interstate pipeline transportation and storage capacity to Marketers. Although Atlanta Gas Light assigns this capacity to Marketers, in the event that a Marketer fails to pay the interstate pipelines for the capacity, the interstate pipelines would likely seek repayment from Atlanta Gas Light.
Wholesale Gas Services
Southern Company Gas has established credit policies to determine and monitor the creditworthiness of counterparties, as well as the quality of pledged collateral. Southern Company Gas also utilizes netting agreements whenever possible to mitigate exposure to counterparty credit risk. When Southern Company Gas is engaged in more than one outstanding derivative transaction with the same counterparty and also has a legally enforceable netting agreement with that counterparty, the "net" mark-to-market exposure represents the netting of the positive and negative exposures with that counterparty and a reasonable measure of Southern Company Gas' credit risk. Southern Company Gas also uses other netting agreements with certain counterparties with whom it conducts significant transactions. Netting agreements enable Southern Company Gas to net certain assets and liabilities by counterparty. Southern Company Gas also nets across product lines and against cash collateral, provided the netting and cash collateral agreements include such provisions.
Southern Company Gas may require counterparties to pledge additional collateral when deemed necessary. Southern Company Gas conducts credit evaluations and obtains appropriate internal approvals for a counterparty's line of credit before any transaction with the counterparty is executed. In most cases, the counterparty must have an investment grade rating, which includes a minimum long-term debt rating of Baa3 from Moody's and BBB- from S&P. Generally, Southern Company Gas requires credit enhancements by way of a guaranty, cash deposit, or letter of credit for transaction counterparties that do not have investment grade ratings.
Certain of Southern Company Gas' derivative instruments contain credit-risk-related or other contingent features that could increase the payments for collateral it posts in the normal course of business when its financial instruments are in net liability positions. At December 31, 2018 , for agreements with such features, Southern Company Gas' derivative instruments with liability fair values totaled $5 million for which Southern Company Gas had no collateral posted with derivatives counterparties to satisfy these arrangements.
Southern Company Gas has a concentration of credit risk as measured by its 30-day receivable exposure plus forward exposure. At December 31, 2018 , wholesale gas services' top 20 counterparties represented approximately 48% , or $298 million , of its total counterparty exposure and had a weighted average S&P equivalent credit rating of A-, all of which is consistent with the prior year. The S&P equivalent credit rating is determined by a process of converting the lower of the S&P or Moody's ratings to an internal rating ranging from 9 to 1, with 9 being equivalent to AAA/Aaa by S&P and Moody's, respectively, and 1 being D / Default by S&P and Moody's, respectively. A counterparty that does not have an external rating is assigned an internal rating based on the strength of the financial ratios of that counterparty. To arrive at the weighted average credit rating, each counterparty is assigned an internal ratio, which is multiplied by their credit exposure and summed for all counterparties. The sum is divided by the aggregate total counterparties' exposures, and this numeric value is then converted to a S&P equivalent.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2018 Annual Report


The following table provides credit risk information related to Southern Company Gas' third-party natural gas contracts receivable and payable positions at December 31:
 
Gross Receivables
 
Gross Payables
 
2018
 
2017
 
2018
 
2017
 
(in millions)
 
(in millions)
Netting agreements in place:
 
 
 
 
 
 
 
Counterparty is investment grade
$
461

 
$
342

 
$
255

 
$
202

Counterparty is non-investment grade
5

 
20

 
95

 
25

Counterparty has no external rating
314

 
226

 
505

 
315

No netting agreements in place:
 
 
 
 
 
 
 
Counterparty is investment grade
19

 
19

 
1

 
4

Counterparty has no external rating
2

 

 

 

Amount recorded in balance sheets
$
801

 
$
607

 
$
856

 
$
546

Gas Marketing Services
Southern Company Gas obtains credit scores for its firm residential and small commercial customers using a national credit reporting agency, enrolling only those customers that meet or exceed Southern Company Gas' credit threshold. Southern Company Gas considers potential interruptible and large commercial customers based on reviews of publicly available financial statements and commercially available credit reports. Prior to entering into a physical transaction, Southern Company Gas also assigns physical wholesale counterparties an internal credit rating and credit limit based on the counterparties' Moody's, S&P, and Fitch ratings, commercially available credit reports, and audited financial statements.
Capital Requirements and Contractual Obligations
Southern Company Gas' capital investments are currently estimated to total $1.6 billion for 2019 , $1.9 billion for 2020 , $1.3 billion for 2021 , $1.2 billion for 2022 , and $1.3 billion for 2023 . The regulatory infrastructure programs and other construction programs are subject to periodic review and revision, and actual costs may vary from these estimates because of numerous factors. These factors include: changes in business conditions; changes in FERC rules and regulations; state regulatory agency approvals; changes in legislation; the cost and efficiency of labor, equipment, and materials; project scope and design changes; and the cost of capital. In addition, there can be no assurance that costs related to capital expenditures will be fully recovered.
In addition, as discussed in Note 11 to the financial statements, Southern Company Gas provides postretirement benefits to certain eligible employees and funds trusts to the extent required by the applicable state regulatory agencies.
Funding requirements related to obligations associated with scheduled maturities of long-term debt, including the related interest; pipeline charges, storage capacity, and gas supply; operating leases; asset management agreements; financial derivative obligations; pension and other postretirement benefit plans; and other purchase commitments, primarily related to environmental remediation liabilities, are detailed in the contractual obligations table that follows. See Notes 1 , 3 , 8 , 9 , 11 , and 14 to the financial statements for additional information.

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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2018 Annual Report


Contractual Obligations
Contractual obligations at December 31, 2018 were as follows:
 
2019
 
2020-
2021
 
2022-
2023
 
After
2023
 
Total
 
(in millions)
Long-term debt (a)  —
 
 
 
 
 
 
 
 
 
Principal
$
350

 
$
330

 
$
446

 
$
4,359

 
$
5,485

Interest
244

 
453

 
422

 
3,242

 
4,361

Pipeline charges, storage capacity, and gas supply (b)
781

 
1,104

 
901

 
1,871

 
4,657

Operating leases (c)
18

 
31

 
23

 
34

 
106

Asset management agreements (d)
10

 
8

 

 

 
18

Financial derivative obligations (e)
583

 
217

 
109

 

 
909

Pension and other postretirement benefit plans (f)
16

 
32

 

 

 
48

Purchase commitments —
 
 
 
 
 
 
 
 
 
Capital (g)
1,591

 
3,231

 
2,496

 

 
7,318

Other (h)
25

 
4

 
2

 

 
31

Total
$
3,618

 
$
5,410

 
$
4,399

 
$
9,506

 
$
22,933

(a)
Amounts are reflected based on final maturity dates. Southern Company Gas plans to continue, when economically feasible, to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit. Variable rate interest obligations are estimated based on rates at December 31, 2018 , as reflected in the statements of capitalization.
(b)
Includes charges recoverable through a natural gas cost recovery mechanism, or alternatively billed to Marketers, and demand charges associated with Sequent. The gas supply balance includes amounts for Nicor Gas and SouthStar gas commodity purchase commitments of 47 million mmBtu at floating gas prices calculated using forward natural gas prices at December 31, 2018 and valued at $150 million. Southern Company Gas provides guarantees to certain gas suppliers for certain of its subsidiaries, including SouthStar, in support of payment obligations.
(c)
Certain operating leases have provisions for step rent or escalation payments and certain lease concessions are accounted for by recognizing the future minimum lease payments on a straight-line basis over the respective minimum lease terms. However, this accounting treatment does not affect the future annual operating lease cash obligations as shown herein. In terms of rental charges and duration of contracts, Southern Company Gas' most significant operating leases relate to real estate.
(d)
Represent fixed-fee minimum payments for Sequent's affiliated asset management agreements.
(e)
See Notes 1 and 14 to the financial statements for additional information.
(f)
Southern Company Gas forecasts contributions to the pension and other postretirement benefit plans over a three-year period. Southern Company Gas anticipates no mandatory contributions to the qualified pension plan during the next three years. Amounts presented represent estimated benefit payments for the nonqualified pension plans, estimated non-trust benefit payments for the other postretirement benefit plans, and estimated contributions to the other postretirement benefit plan trusts, all of which will be made from Southern Company Gas' corporate assets. See Note 11 to the financial statements for additional information related to the pension and other postretirement benefit plans, including estimated benefit payments. Certain benefit payments will be made through the related benefit plans. Other benefit payments will be made from Southern Company Gas' corporate assets.
(g)
Estimated capital expenditures are provided through 2023. At December 31, 2018 , significant purchase commitments were outstanding in connection with infrastructure and other construction programs.
(h)
Includes contractual environmental remediation liabilities that are generally recoverable through base rates or rate rider mechanisms and LTSAs.

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Item 7A.
QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
See MANAGEMENT'S DISCUSSION AND ANALYSIS – FINANCIAL CONDITION AND LIQUIDITY – "Market Price Risk" of each of the registrants in Item 7 herein and Note  1 to the financial statements under "Financial Instruments" in Item 8 herein. Also see Notes  13 and 14 to the financial statements in Item 8 herein.

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Item 8.
FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
INDEX TO 2018 FINANCIAL STATEMENTS
 
Page
 
 
 
 
 
 
 
 
 
 

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Page
 
 
 
 
 
 

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholders and the Board of Directors of The Southern Company and Subsidiary Companies
Opinions on the Financial Statements and Internal Control over Financial Reporting
We have audited the accompanying consolidated balance sheets and consolidated statements of capitalization of The Southern Company and subsidiary companies (Southern Company) as of December 31, 2018 and 2017 , the related consolidated statements of income, comprehensive income, stockholders' equity, and cash flows for each of the three years in the period ended December 31, 2018 , and the related notes (collectively referred to as the "financial statements"). We also have audited Southern Company's internal control over financial reporting as of December 31, 2018 , based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).
In our opinion, the financial statements referred to above present fairly, in all material respects, the financial position of Southern Company as of December 31, 2018 and 2017 , and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018 , in conformity with accounting principles generally accepted in the United States of America. Also, in our opinion, Southern Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2018 , based on criteria established in Internal Control – Integrated Framework (2013) issued by COSO.
Basis for Opinions
Southern Company's management is responsible for these financial statements, for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management's Report on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on these financial statements and an opinion on Southern Company's internal control over financial reporting based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to Southern Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud, and whether effective internal control over financial reporting was maintained in all material respects.
Our audits of the consolidated financial statements included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures to respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.
Definition and Limitations of Internal Control over Financial Reporting
A company's internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company's internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company's assets that could have a material effect on the financial statements.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2019
We have served as Southern Company's auditor since 2002.

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CONSOLIDATED STATEMENTS OF INCOME
For the Years Ended December 31, 2018 , 2017 , and 2016
Southern Company and Subsidiary Companies 2018 Annual Report

 
2018

 
2017

 
2016

 
(in millions)
Operating Revenues:
 
 
 
 
 
Retail electric revenues
$
15,222

 
$
15,330

 
$
15,234

Wholesale electric revenues
2,516

 
2,426

 
1,926

Other electric revenues
664

 
681

 
698

Natural gas revenues
3,854

 
3,791

 
1,596

Other revenues
1,239

 
803

 
442

Total operating revenues
23,495

 
23,031

 
19,896

Operating Expenses:
 
 
 
 
 
Fuel
4,637

 
4,400

 
4,361

Purchased power
971

 
863

 
750

Cost of natural gas
1,539

 
1,601

 
613

Cost of other sales
806

 
513

 
260

Other operations and maintenance
5,889

 
5,739

 
5,382

Depreciation and amortization
3,131

 
3,010

 
2,502

Taxes other than income taxes
1,315

 
1,250

 
1,113

Estimated loss on plants under construction
1,097

 
3,362

 
428

Impairment charges
210

 

 

Gain on dispositions, net
(291
)
 
(40
)
 
1

Total operating expenses
19,304

 
20,698

 
15,410

Operating Income
4,191

 
2,333

 
4,486

Other Income and (Expense):
 
 
 
 
 
Allowance for equity funds used during construction
138

 
160

 
202

Earnings from equity method investments
148

 
106

 
59

Interest expense, net of amounts capitalized
(1,842
)
 
(1,694
)
 
(1,317
)
Other income (expense), net
114

 
163

 
50

Total other income and (expense)
(1,442
)
 
(1,265
)
 
(1,006
)
Earnings Before Income Taxes
2,749

 
1,068

 
3,480

Income taxes
449

 
142

 
951

Consolidated Net Income
2,300

 
926

 
2,529

Dividends on preferred and preference stock of subsidiaries
16

 
38

 
45

Net income attributable to noncontrolling interests
58

 
46

 
36

Consolidated Net Income Attributable to Southern Company
$
2,226

 
$
842

 
$
2,448

Common Stock Data:
 
 
 
 
 
Earnings per share —
 
 
 
 
 
Basic
$
2.18

 
$
0.84

 
$
2.57

Diluted
2.17

 
0.84

 
2.55

Average number of shares of common stock outstanding — (in millions)
 
 
 
 
 
Basic
1,020

 
1,000

 
951

Diluted
1,025

 
1,008

 
958

The accompanying notes are an integral part of these consolidated financial statements.
 

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
For the Years Ended December 31, 2018 , 2017 , and 2016
Southern Company and Subsidiary Companies 2018 Annual Report
 
 
2018

 
2017

 
2016

 
(in millions)
Consolidated Net Income
$
2,300

 
$
926

 
$
2,529

Other comprehensive income (loss):
 
 
 
 
 
Qualifying hedges:
 
 
 
 
 
Changes in fair value, net of tax of $(16), $34, and $(84), respectively
(47
)
 
57

 
(136
)
Reclassification adjustment for amounts included in net income,
net of tax of $24, $(37), and $43, respectively
72

 
(60
)
 
69

Pension and other postretirement benefit plans:
 
 
 
 
 
Benefit plan net gain (loss), net of tax of $(2), $6, and $10,
respectively
(5
)
 
17

 
13

Reclassification adjustment for amounts included in net income,
net of tax of $5, $(6), and $3, respectively
6

 
(23
)
 
4

Total other comprehensive income (loss)
26

 
(9
)
 
(50
)
Dividends on preferred and preference stock of subsidiaries
16

 
38

 
45

Comprehensive income attributable to noncontrolling interests
58

 
46

 
36

Consolidated Comprehensive Income Attributable to Southern Company
$
2,252

 
$
833

 
$
2,398

The accompanying notes are an integral part of these consolidated financial statements.
 

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CONSOLIDATED STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2018 , 2017 , and 2016
Southern Company and Subsidiary Companies 2018 Annual Report
 
2018

 
2017

 
2016

 
 
 
(in millions)
Operating Activities:
 
 
 
 
 
Consolidated net income
$
2,300

 
$
926

 
$
2,529

Adjustments to reconcile consolidated net income
to net cash provided from operating activities —
 
 
 
 
 
Depreciation and amortization, total
3,549

 
3,457

 
2,923

Deferred income taxes
94

 
166

 
(127
)
Collateral deposits
17

 
(4
)
 
(102
)
Allowance for equity funds used during construction
(138
)
 
(160
)
 
(202
)
Pension and postretirement funding
(4
)
 
(2
)
 
(1,029
)
Settlement of asset retirement obligations
(244
)
 
(177
)
 
(171
)
Stock based compensation expense
125

 
109

 
121

Hedge settlements
(10
)
 
6

 
(233
)
Estimated loss on plants under construction
1,093

 
3,179

 
428

Impairment charges
210

 

 

Gain on dispositions, net
(301
)
 
(42
)
 
(2
)
Other, net
(22
)
 
(112
)
 
(219
)
Changes in certain current assets and liabilities —
 
 
 
 
 
-Receivables
(426
)
 
(202
)
 
(544
)
-Fossil fuel for generation
123

 
36

 
178

-Natural gas for sale
49

 
36

 
(226
)
-Other current assets
(127
)
 
(143
)
 
(206
)
-Accounts payable
291

 
(280
)
 
301

-Accrued taxes
267

 
(142
)
 
1,456

-Retail fuel cost over recovery
36

 
(212
)
 
(231
)
-Other current liabilities
63

 
(45
)
 
250

Net cash provided from operating activities
6,945

 
6,394

 
4,894

Investing Activities:
 
 
 
 
 
Business acquisitions, net of cash acquired
(65
)
 
(1,054
)
 
(10,680
)
Property additions
(8,001
)
 
(7,423
)
 
(7,310
)
Proceeds pursuant to the Toshiba Guarantee, net of joint owner portion               

 
1,682

 

Nuclear decommissioning trust fund purchases
(1,117
)
 
(811
)
 
(1,160
)
Nuclear decommissioning trust fund sales
1,111

 
805

 
1,154

Proceeds from dispositions
2,956

 
97

 
15

Cost of removal, net of salvage
(388
)
 
(313
)
 
(245
)
Change in construction payables, net
50

 
259

 
(121
)
Investment in unconsolidated subsidiaries
(114
)
 
(152
)
 
(1,444
)
Payments pursuant to LTSAs
(186
)
 
(227
)
 
(134
)
Other investing activities
(6
)
 
(53
)
 
(122
)
Net cash used for investing activities
(5,760
)
 
(7,190
)
 
(20,047
)
Financing Activities:
 
 
 
 
 
Increase (decrease) in notes payable, net
(774
)
 
(401
)
 
1,228

Proceeds —
 
 
 
 
 
Long-term debt
2,478

 
5,858

 
16,368

Common stock
1,090

 
793

 
3,758

Preferred stock

 
250

 

Short-term borrowings
3,150

 
1,259

 

Redemptions and repurchases —
 
 
 
 
 
Long-term debt
(5,533
)
 
(2,930
)
 
(3,145
)
Preferred and preference stock
(33
)
 
(658
)
 

Short-term borrowings
(1,900
)
 
(659
)
 
(478
)
Distributions to noncontrolling interests
(153
)
 
(119
)
 
(72
)
Capital contributions from noncontrolling interests
2,551

 
80

 
682

Payment of common stock dividends
(2,425
)
 
(2,300
)
 
(2,104
)
Other financing activities
(264
)
 
(222
)
 
(512
)
Net cash provided from (used for) financing activities
(1,813
)
 
951

 
15,725

Net Change in Cash, Cash Equivalents, and Restricted Cash
(628
)
 
155

 
572

Cash, Cash Equivalents, and Restricted Cash at Beginning of Year
2,147

 
1,992

 
1,420

Cash, Cash Equivalents, and Restricted Cash at End of Year
$
1,519

 
$
2,147

 
$
1,992

Supplemental Cash Flow Information:
 
 
 
 
 
Cash paid (received) during the period for —
 
 
 
 
 
Interest (net of $72, $89, and $128 capitalized, respectively)
$
1,794

 
$
1,676

 
$
1,066

Income taxes (net of refunds)
172

 
(410
)
 
(148
)
Noncash transactions — Accrued property additions at year-end
1,103

 
985

 
1,262

The accompanying notes are an integral part of these consolidated financial statements.

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CONSOLIDATED BALANCE SHEETS
At December 31, 2018 and 2017
Southern Company and Subsidiary Companies 2018 Annual Report
Assets
2018

 
2017

 
(in millions)
Current Assets:
 
 
 
Cash and cash equivalents
$
1,396

 
$
2,130

Receivables —
 
 
 
Customer accounts receivable
1,726

 
1,806

Energy marketing receivable
801

 
607

Unbilled revenues
654

 
810

Under recovered fuel clause revenues
115

 
171

Other accounts and notes receivable
813

 
698

Accumulated provision for uncollectible accounts
(50
)
 
(44
)
Materials and supplies
1,465

 
1,438

Fossil fuel for generation
405

 
594

Natural gas for sale
524

 
595

Prepaid expenses
432

 
452

Assets from risk management activities, net of collateral
222

 
137

Other regulatory assets, current
525

 
604

Assets held for sale, current
393

 
12

Other current assets
162

 
62

Total current assets
9,583

 
10,072

Property, Plant, and Equipment:
 
 
 
In service
103,706

 
103,542

Less: Accumulated depreciation
31,038

 
31,457

Plant in service, net of depreciation
72,668

 
72,085

Nuclear fuel, at amortized cost
875

 
883

Construction work in progress
7,254

 
6,904

Total property, plant, and equipment
80,797

 
79,872

Other Property and Investments:
 
 
 
Goodwill
5,315


6,268

Equity investments in unconsolidated subsidiaries
1,580


1,513

Other intangible assets, net of amortization of $235 and $186
at December 31, 2018 and December 31, 2017, respectively
613

 
873

Nuclear decommissioning trusts, at fair value
1,721

 
1,832

Leveraged leases
798

 
775

Miscellaneous property and investments
269

 
249

Total other property and investments
10,296

 
11,510

Deferred Charges and Other Assets:
 
 
 
Deferred charges related to income taxes
794

 
825

Unamortized loss on reacquired debt
323

 
206

Other regulatory assets
8,308

 
6,943

Assets held for sale
5,350

 

Other deferred charges and assets
1,463

 
1,577

Total deferred charges and other assets
16,238

 
9,551

Total Assets
$
116,914

 
$
111,005

The accompanying notes are an integral part of these consolidated financial statements.

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CONSOLIDATED BALANCE SHEETS
At December 31, 2018 and 2017
Southern Company and Subsidiary Companies 2018 Annual Report
Liabilities and Stockholders' Equity
2018

 
2017

 
(in millions)
Current Liabilities:
 
 
 
Securities due within one year
$
3,198

 
$
3,892

Notes payable
2,915

 
2,439

Energy marketing trade payables
856

 
546

Accounts payable
2,580

 
2,530

Customer deposits
522

 
542

Accrued taxes
656

 
636

Accrued interest
472

 
488

Accrued compensation
1,030

 
959

Asset retirement obligations, current
404

 
351

Other regulatory liabilities, current
376

 
337

Liabilities held for sale, current
425

 

Other current liabilities
852

 
874

Total current liabilities
14,286

 
13,594

Long-Term Debt  ( See accompanying statements )
40,736

 
44,462

Deferred Credits and Other Liabilities:
 
 
 
Accumulated deferred income taxes
6,558

 
6,842

Deferred credits related to income taxes
6,460

 
7,256

Accumulated deferred ITCs
2,372

 
2,267

Employee benefit obligations
2,147

 
2,256

Asset retirement obligations
8,990

 
4,473

Accrued environmental remediation
268

 
389

Other cost of removal obligations
2,297

 
2,684

Other regulatory liabilities
169

 
239

Liabilities held for sale
2,836

 

Other deferred credits and liabilities
465

 
691

Total deferred credits and other liabilities
32,562

 
27,097

Total Liabilities
87,584

 
85,153

Redeemable Preferred Stock of Subsidiaries  ( See accompanying statements )
291

 
324

Total Stockholders' Equity ( See accompanying statements )
29,039

 
25,528

Total Liabilities and Stockholders' Equity
$
116,914

 
$
111,005

Commitments and Contingent Matters  ( See notes )

 

The accompanying notes are an integral part of these consolidated financial statements.
 

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CONSOLIDATED STATEMENTS OF CAPITALIZATION
At December 31, 2018 and 2017
Southern Company and Subsidiary Companies 2018 Annual Report

 
 
 
2018

 
2017

 
2018

 
2017

 
 
 
(in millions)
 
 
(percent of total)
Long-Term Debt:
 
 
 
 
 
 
 
 
 
Long-term debt payable to affiliated trusts —
 
 
 
 
 
 
 
 
 
Variable rate (5.50% at 12/31/18) due 2042
 
 
$
206

 
$
206

 
 
 
 
Long-term senior notes and debt —
 
 
 
 
 
 
 
 
 
Maturity
Interest Rates
 
 
 
 
 
 
 
 
2018
1.50% to 5.40%
 

 
2,352

 
 
 
 
2019
1.85% to 5.55%
 
2,948

 
3,074

 
 
 
 
2020
2.00% to 4.75%
 
2,271

 
2,273

 
 
 
 
2021
2.35% to 9.10%
 
2,638

 
2,643

 
 
 
 
2022
1.00% to 8.70%
 
1,983

 
2,016

 
 
 
 
2023
2.45% to 5.75%
 
2,290

 
2,290

 
 
 
 
2025 through 2048
1.63% to 7.30%
 
19,895

 
19,902

 
 
 
 
Variable rates (2.29% to 3.05% at 12/31/17) due 2018
 
 

 
1,420

 
 
 
 
Variable rates (3.10% to 3.50% at 12/31/18) due 2020
 
 
1,875

 
825

 
 
 
 
Variable rates (3.34% to 3.91% at 12/31/18) due 2021
 
 
125

 
25

 
 
 
 
Total long-term senior notes and debt
 
 
34,025

 
36,820

 
 
 
 
Other long-term debt —
 
 
 
 
 
 
 
 
 
Pollution control revenue bonds —
 
 
 
 
 
 
 
 
 
Maturity
Interest Rates
 
 
 
 
 
 
 
 
2019
4.55%
 
25

 
25

 
 
 
 
2022
2.10% to 2.35%
 
90

 
90

 
 
 
 
2023
1.15% to 2.60%
 
33

 
33

 
 
 
 
2025 through 2049
1.40% to 5.15%
 
1,112

 
1,346

 
 
 
 
Variable rates (1.77% to 2.23% at 12/31/18) due 2019
 
 
148

 
148

 
 
 
 
Variable rates (1.76% to 1.87% at 12/31/18) due 2021
 
 
65

 
65

 
 
 
 
Variable rates (1.76% at 12/31/18) due 2022
 
 
4

 
4

 
 
 
 
Variable rates (1.70% to 1.87% at 12/31/18) due 2024 to 2053
 
 
1,417

 
1,585

 
 
 
 
Plant Daniel revenue bonds (7.13%) due 2021
 
 
270

 
270

 
 
 
 
Gas facility revenue bonds —
 
 
 
 
 
 
 
 
 
Variable rate (1.71% at 12/31/17) due 2022
 
 

 
47

 
 
 
 
Variable rate (1.71% at 12/31/17) due 2024 to 2033
 
 

 
154

 
 
 
 
FFB loans —
 
 
 
 
 
 
 
 
 
2.57% to 3.86% due 2020
 
 
44

 
44

 
 
 
 
2.57% to 3.86% due 2021
 
 
44

 
44

 
 
 
 
2.57% to 3.86% due 2022
 
 
44

 
44

 
 
 
 
2.57% to 3.86% due 2023
 
 
44

 
44

 
 
 
 
2.57% to 3.86% due 2024 to 2044
 
 
2,449

 
2,449

 
 
 
 
First mortgage bonds —
 
 
 
 
 
 
 
 
 
4.70% due 2019
 
 
50

 
50

 
 
 
 
5.80% due 2023
 
 
50

 
50

 
 
 
 
2.66% to 6.58% due 2026 to 2058
 
 
1,225

 
925

 
 
 
 
Junior subordinated notes (5.00% to 6.25%) due 2057 to 2077
 
 
3,570

 
3,570

 
 
 
 
Total other long-term debt
 
 
10,684

 
10,987

 
 
 
 
Unamortized fair value adjustment of long-term debt
 
 
474

 
525

 
 
 
 
Capitalized lease obligations
 
 
197

 
204

 
 
 
 
Unamortized debt premium
 
 
36

 
44

 
 
 
 
Unamortized debt discount
 
 
(194
)
 
(206
)
 
 
 
 
Unamortized debt issuance expense
 
 
(208
)
 
(226
)
 
 
 
 
Total long-term debt (annual interest requirement — $1.7 billion)
 
45,220

 
48,354

 
 
 
 
Less:
 
 
 
 
 
 
 
 
 
Amount due within one year
 
 
3,198

 
3,892

 
 
 
 
Amount held for sale
 
 
1,286

 

 
 
 
 
Long-term debt excluding amounts due within one year and held for sale
 
 
40,736

 
44,462

 
58.1
%
 
63.2
%
 
 
 
 
 
 
 
 
 
 

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     Table of Contents                                  Index to Financial Statements

CONSOLIDATED STATEMENTS OF CAPITALIZATION (continued)
At December 31, 2018 and 2017
Southern Company and Subsidiary Companies 2018 Annual Report
 
 
 
 
 
 
 
 
 
 
 
2018

 
2017

 
2018

 
2017

 
 
 
(in millions)
 
 
(percent of total)
Redeemable Preferred Stock of Subsidiaries:
 
 
 
 
 
 
 
 
 
Cumulative preferred stock
 
 
 
 
 
 
 
 
 
$100 par or stated value — 4.20% to 5.44%
 
 
 
 
 
 
 
 
 
Authorized — 20 million shares
 
 
 
 
 
 
 
 
 
Outstanding — 2018: 475,115 shares
 
 
 
 
 
 
 
 
 
                — 2017: 809,325 shares
 
 
48

 
81

 
 
 
 
$1 par value — 5.83%
 
 
 
 
 
 
 
 
 
Authorized — 28 million shares
 
 
 
 
 
 
 
 
 
Outstanding — 10,000,000 shares
 
 
243

 
243

 
 
 
 
Total redeemable preferred stock of subsidiaries
 
 


 


 
 
 
 
(annual dividend requirement — $15 million)
 
 
291

 
324

 
0.4

 
0.5

Common Stockholders' Equity:
 
 
 
 
 
 
 
 
 
Common stock, par value $5 per share —
 
 
5,164

 
5,038

 
 
 
 
Authorized — 1.5 billion shares
 
 
 
 
 
 
 
 
 
Issued — 2018: 1.0 billion shares
 
 
 
 
 
 
 
 
 
  — 2017: 1.0 billion shares
 
 
 
 
 
 
 
 
 
Treasury — 2018: 1.0 million shares
 
 
 
 
 
 
 
 
 
      — 2017: 0.9 million shares
 
 
 
 
 
 
 
 
 
Paid-in capital
 
 
11,094

 
10,469

 
 
 
 
Treasury, at cost
 
 
(38
)
 
(36
)
 
 
 
 
Retained earnings
 
 
8,706

 
8,885

 
 
 
 
Accumulated other comprehensive loss
 
 
(203
)
 
(189
)
 
 
 
 
Total common stockholders' equity
 
 
24,723

 
24,167

 
35.3

 
34.4

Noncontrolling interests
 
 
4,316

 
1,361

 
6.2

 
1.9

Total stockholders' equity
 
 
29,039

 
25,528

 
 
 
 
Total Capitalization
 
 
$
70,066

 
$
70,314

 
100.0
%
 
100.0
%

The accompanying notes are an integral part of these consolidated financial statements. 

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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
For the Years Ended December 31, 2018 , 2017 , and 2016
Southern Company and Subsidiary Companies 2018 Annual Report
 
Southern Company Common Stockholders' Equity
 
 
 
 
 
 
Number of Common Shares
 
Common Stock
 
 
 
Accumulated
Other
Comprehensive Income
(Loss)
 
Preferred
and Preference Stock of Subsidiaries
 
Noncontrolling
Interests (a)
 
 
Issued
 
Treasury
 
Par Value
 
Paid-In Capital
 
Treasury
 
Retained Earnings
 
 
 
Total
 
(in thousands)
 
(in millions)
Balance at December 31, 2015
915,073

 
(3,352
)
 
$
4,572

 
$
6,282

 
$
(142
)
 
$
10,010

 
$
(130
)
 
$
609

 
$
781

$
21,982

Consolidated net income attributable
   to Southern Company

 

 

 

 

 
2,448

 

 

 

2,448

Other comprehensive income (loss)

 

 

 

 

 

 
(50
)
 

 

(50
)
Stock issued
76,140

 
2,599

 
380

 
3,263

 
115

 

 

 

 

3,758

Stock-based compensation

 

 

 
120

 

 

 

 

 

120

Cash dividends of $2.2225 per share

 

 

 

 

 
(2,104
)
 

 

 

(2,104
)
Contributions from
   noncontrolling interests

 

 

 

 

 

 

 

 
618

618

Distributions to
   noncontrolling interests

 

 

 

 

 

 

 

 
(57
)
(57
)
Purchase of membership interests
from noncontrolling interests

 

 

 

 

 

 

 

 
(129
)
(129
)
Net income attributable to
   noncontrolling interests

 

 

 

 

 

 

 

 
32

32

Other

 
(66
)
 

 
(4
)
 
(4
)
 
2

 

 

 

(6
)
Balance at December 31, 2016
991,213

 
(819
)
 
4,952

 
9,661

 
(31
)
 
10,356

 
(180
)
 
609

 
1,245

26,612

Consolidated net income attributable
   to Southern Company

 

 

 

 

 
842

 

 

 

842

Other comprehensive income (loss)

 

 

 

 

 

 
(9
)
 

 

(9
)
Stock issued
17,319

 

 
86

 
707

 

 

 

 

 

793

Stock-based compensation

 

 

 
105

 

 

 

 

 

105

Cash dividends of $2.3000 per share

 

 

 

 

 
(2,300
)
 

 

 

(2,300
)
Preferred and preference stock
redemptions

 

 

 

 

 

 

 
(609
)
 

(609
)
Contributions from
   noncontrolling interests

 

 

 

 

 

 

 

 
79

79

Distributions to
   noncontrolling interests

 

 

 

 

 

 

 

 
(122
)
(122
)
Net income attributable to
   noncontrolling interests

 

 

 

 

 

 

 

 
44

44

Reclassification from redeemable
noncontrolling interests

 

 

 

 

 

 

 

 
114

114

Other

 
(110
)
 

 
(4
)
 
(5
)
 
(13
)
 

 

 
1

(21
)
Balance at December 31, 2017
1,008,532

 
(929
)
 
5,038

 
10,469

 
(36
)
 
8,885

 
(189
)
 

 
1,361

25,528

Consolidated net income attributable
   to Southern Company

 

 

 

 

 
2,226

 

 

 

2,226

Other comprehensive income (loss)

 

 

 

 

 

 
26

 

 

26

Stock issued
26,209

 

 
126

 
964

 

 

 

 

 

1,090

Stock-based compensation

 

 

 
84

 

 

 

 

 

84

Cash dividends of $2.3800 per share

 

 

 

 

 
(2,425
)
 

 

 

(2,425
)
Contributions from
   noncontrolling interests

 

 

 

 

 

 

 

 
1,372

1,372

Distributions to
   noncontrolling interests

 

 

 

 

 

 

 

 
(164
)
(164
)
Net income attributable to
   noncontrolling interests

 

 

 

 

 

 

 

 
58

58

Sale of noncontrolling interests

 

 

 
(417
)
 

 

 

 

 
1,690

1,273

Other

 
(24
)
 

 
(6
)
 
(2
)
 
20

 
(40
)
 

 
(1
)
(29
)
Balance at December 31, 2018
1,034,741

 
(953
)
 
$
5,164

 
$
11,094

 
$
(38
)
 
$
8,706

 
$
(203
)
 
$

 
$
4,316

$
29,039

(a)
Excludes redeemable noncontrolling interests. See Note 7 to the financial statements under "Noncontrolling Interests" for additional information.
The accompanying notes are an integral part of these consolidated financial statements.

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     Table of Contents                                  Index to Financial Statements


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholders and the Board of Directors of Alabama Power Company
Opinion on the Financial Statements
We have audited the accompanying balance sheets and statements of capitalization of Alabama Power Company (Alabama Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2018 and 2017 , the related statements of income, comprehensive income, common stockholder's equity, and cash flows for each of the three years in the period ended December 31, 2018 , and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of Alabama Power as of December 31, 2018 and 2017 , and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018 , in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of Alabama Power's management. Our responsibility is to express an opinion on Alabama Power's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to Alabama Power in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Alabama Power is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of Alabama Power's internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.
/s/ Deloitte & Touche LLP
Birmingham, Alabama
February 19, 2019
We have served as Alabama Power's auditor since 2002.

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     Table of Contents                                  Index to Financial Statements

STATEMENTS OF INCOME
For the Years Ended December 31, 2018 , 2017 , and 2016
Alabama Power Company 2018 Annual Report
 
 
2018

 
2017

 
2016

 
(in millions)
Operating Revenues:
 
 
 
 
 
Retail revenues
$
5,367

 
$
5,458

 
$
5,322

Wholesale revenues, non-affiliates
279

 
276

 
283

Wholesale revenues, affiliates
119

 
97

 
69

Other revenues
267

 
208

 
215

Total operating revenues
6,032

 
6,039

 
5,889

Operating Expenses:
 
 
 
 
 
Fuel
1,301

 
1,225

 
1,297

Purchased power, non-affiliates
216

 
170

 
166

Purchased power, affiliates
216

 
158

 
168

Other operations and maintenance
1,669

 
1,709

 
1,557

Depreciation and amortization
764

 
736

 
703

Taxes other than income taxes
389

 
384

 
380

Total operating expenses
4,555

 
4,382

 
4,271

Operating Income
1,477

 
1,657

 
1,618

Other Income and (Expense):
 
 
 
 
 
Allowance for equity funds used during construction
62

 
39

 
28

Interest expense, net of amounts capitalized
(323
)
 
(305
)
 
(302
)
Other income (expense), net
20

 
43

 
26

Total other income and (expense)
(241
)
 
(223
)
 
(248
)
Earnings Before Income Taxes
1,236

 
1,434

 
1,370

Income taxes
291

 
568

 
531

Net Income
945

 
866

 
839

Dividends on Preferred and Preference Stock
15

 
18

 
17

Net Income After Dividends on Preferred and Preference Stock
$
930

 
$
848

 
$
822

The accompanying notes are an integral part of these financial statements.


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     Table of Contents                                  Index to Financial Statements

STATEMENTS OF COMPREHENSIVE INCOME
For the Years Ended December 31, 2018 , 2017 , and 2016
Alabama Power Company 2018 Annual Report

 
2018

 
2017

 
2016

 
(in millions)
Net Income
$
945

 
$
866

 
$
839

Other comprehensive income (loss):
 
 
 
 
 
Qualifying hedges:
 
 
 
 
 
Changes in fair value, net of tax of $-, $(1), and $(1), respectively

 
1

 
(2
)
Reclassification adjustment for amounts included in net income,
net of tax of $2, $2, and $2, respectively
4

 
3

 
4

Total other comprehensive income (loss)
4

 
4

 
2

Comprehensive Income
$
949

 
$
870

 
$
841

The accompanying notes are an integral part of these financial statements.
 

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STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2018 , 2017 , and 2016
Alabama Power Company 2018 Annual Report
 
2018

 
2017

 
2016

 
(in millions)
Operating Activities:
 
 
 
 
 
Net income
$
945

 
$
866

 
$
839

Adjustments to reconcile net income
to net cash provided from operating activities —
 
 
 
 
 
Depreciation and amortization, total
917

 
888

 
844

Deferred income taxes
174

 
409

 
407

Allowance for equity funds used during construction
(62
)
 
(39
)
 
(28
)
Pension and postretirement funding
(4
)
 
(2
)
 
(133
)
Settlement of asset retirement obligations
(55
)
 
(26
)
 
(25
)
Other, net
(1
)
 
13

 
(77
)
Changes in certain current assets and liabilities —
 
 
 
 
 
-Receivables
(149
)
 
(168
)
 
94

-Prepayments
(2
)
 
(2
)
 
1

-Materials and supplies
(82
)
 
(34
)
 
(38
)
-Other current assets
30

 
20

 
38

-Accounts payable
24

 
71

 
73

-Accrued taxes
10

 
(84
)
 
93

-Accrued compensation
8

 
(2
)
 
12

-Retail fuel cost over recovery

 
(76
)
 
(162
)
-Other current liabilities
128

 
3

 
11

Net cash provided from operating activities
1,881

 
1,837

 
1,949

Investing Activities:
 
 
 
 
 
Property additions
(2,158
)
 
(1,882
)
 
(1,272
)
Nuclear decommissioning trust fund purchases
(279
)
 
(237
)
 
(352
)
Nuclear decommissioning trust fund sales
278

 
237

 
351

Cost of removal net of salvage
(130
)
 
(112
)
 
(94
)
Change in construction payables
26

 
161

 
(37
)
Other investing activities
(26
)
 
(43
)
 
(34
)
Net cash used for investing activities
(2,289
)
 
(1,876
)
 
(1,438
)
Financing Activities:
 
 
 
 
 
Proceeds —
 
 
 
 
 
Senior notes
500

 
1,100

 
400

Preferred stock

 
250

 

Pollution control revenue bonds
120

 

 

Other long-term debt

 

 
45

Capital contributions from parent company
511

 
361

 
260

Redemptions and repurchases —
 
 
 
 
 
Senior notes

 
(525
)
 
(200
)
Preferred and preference stock

 
(238
)
 

Pollution control revenue bonds
(120
)
 
(36
)
 

Payment of common stock dividends
(801
)
 
(714
)
 
(765
)
Other financing activities
(33
)
 
(35
)
 
(25
)
Net cash provided from (used for) financing activities
177

 
163

 
(285
)
Net Change in Cash, Cash Equivalents, and Restricted Cash
(231
)
 
124

 
226

Cash, Cash Equivalents, and Restricted Cash at Beginning of Year
544

 
420

 
194

Cash, Cash Equivalents, and Restricted Cash at End of Year
$
313

 
$
544

 
$
420

Supplemental Cash Flow Information:
 
 
 
 
 
Cash paid (received) during the period for —
 
 
 
 
 
Interest (net of $22, $15, and $11 capitalized, respectively)
$
284

 
$
285

 
$
277

Income taxes (net of refunds)
106

 
236

 
(108
)
Noncash transactions — Accrued property additions at year-end
272

 
245

 
84

The accompanying notes are an integral part of these financial statements.

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     Table of Contents                                  Index to Financial Statements

BALANCE SHEETS
At December 31, 2018 and 2017
Alabama Power Company 2018 Annual Report
 
Assets
2018

 
2017

 
(in millions)
Current Assets:
 
 
 
Cash and cash equivalents
$
313

 
$
544

Receivables —
 
 
 
Customer accounts receivable
403

 
355

Unbilled revenues
150

 
162

Affiliated
94

 
43

Other accounts and notes receivable
51

 
55

Accumulated provision for uncollectible accounts
(10
)
 
(9
)
Fossil fuel stock
141

 
184

Materials and supplies
546

 
458

Prepaid expenses
66

 
85

Other regulatory assets, current
137

 
124

Other current assets
18

 
5

Total current assets
1,909

 
2,006

Property, Plant, and Equipment:
 
 
 
In service
30,402

 
27,326

Less: Accumulated provision for depreciation
9,988

 
9,563

Plant in service, net of depreciation
20,414

 
17,763

Nuclear fuel, at amortized cost
324

 
339

Construction work in progress
1,113

 
908

Total property, plant, and equipment
21,851

 
19,010

Other Property and Investments:
 
 
 
Equity investments in unconsolidated subsidiaries
65

 
67

Nuclear decommissioning trusts, at fair value
847

 
903

Miscellaneous property and investments
127

 
124

Total other property and investments
1,039

 
1,094

Deferred Charges and Other Assets:
 
 
 
Deferred charges related to income taxes
240

 
239

Deferred under recovered regulatory clause revenues
116

 
54

Other regulatory assets, deferred
1,386

 
1,272

Other deferred charges and assets
189

 
189

Total deferred charges and other assets
1,931

 
1,754

Total Assets
$
26,730

 
$
23,864

The accompanying notes are an integral part of these financial statements.
 


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BALANCE SHEETS
At December 31, 2018 and 2017
Alabama Power Company 2018 Annual Report
 
Liabilities and Stockholder's Equity
2018

 
2017

 
(in millions)
Current Liabilities:
 
 
 
Securities due within one year
$
201

 
$

Accounts payable —
 
 
 
Affiliated
364

 
327

Other
614

 
585

Customer deposits
96

 
92

Accrued taxes
44

 
54

Accrued interest
89

 
77

Accrued compensation
227

 
205

Asset retirement obligations, current
163

 
7

Other current liabilities
161

 
53

Total current liabilities
1,959

 
1,400

Long-Term Debt  (See accompanying statements)
7,923

 
7,628

Deferred Credits and Other Liabilities:
 
 
 
Accumulated deferred income taxes
2,962

 
2,760

Deferred credits related to income taxes
2,027

 
2,082

Accumulated deferred ITCs
106

 
112

Employee benefit obligations
314

 
304

Asset retirement obligations
3,047

 
1,702

Other cost of removal obligations
497

 
609

Other regulatory liabilities, deferred
69

 
84

Other deferred credits and liabilities
58

 
63

Total deferred credits and other liabilities
9,080

 
7,716

Total Liabilities
18,962

 
16,744

Redeemable Preferred Stock  (See accompanying statements)
291

 
291

Common Stockholder's Equity (See accompanying statements)
7,477

 
6,829

Total Liabilities and Stockholder's Equity
$
26,730

 
$
23,864

Commitments and Contingent Matters  (See notes)

 

The accompanying notes are an integral part of these financial statements.


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STATEMENTS OF CAPITALIZATION
At December 31, 2018 and 2017
Alabama Power Company 2018 Annual Report
 
 
2018

 
2017

 
2018

 
2017

 
(in millions)
 
(percent of total)
Long-Term Debt:
 
 
 
 
 
 
 
Long-term debt payable to affiliated trusts —
 
 
 
 
 
 
 
Variable rate (5.50% at 12/31/18) due 2042
$
206

 
$
206

 
 
 
 
Long-term notes payable —
 
 
 
 
 
 
 
5.125% due 2019
200

 
200

 
 
 
 
3.375% due 2020
250

 
250

 
 
 
 
2.38% to 3.95% due 2021
220

 
220

 
 
 
 
2.45% to 5.875% due 2022
750

 
750

 
 
 
 
3.55% due 2023
300

 
300

 
 
 
 
2.80% to 6.125% due 2025-2048
5,175

 
4,675

 
 
 
 
Variable rates (3.70% to 3.91% at 12/31/18) due 2021
25

 
25

 
 
 
 
Total long-term notes payable
6,920

 
6,420

 
 
 
 
Other long-term debt —
 
 
 
 
 
 
 
Pollution control revenue bonds —
 
 
 
 
 
 
 
1.625% to 2.90% due 2034
207

 
207

 
 
 
 
Variable rates (1.76% to 1.87% at 12/31/18) due 2021
65

 
65

 
 
 
 
Variable rates (1.70% to 1.80% at 12/31/18) due 2024-2038
788

 
788

 
 
 
 
Total other long-term debt
1,060

 
1,060

 
 
 
 
Capitalized lease obligations
4

 
4

 
 
 
 
Unamortized debt premium (discount), net
(12
)
 
(11
)
 
 
 
 
Unamortized debt issuance expense
(54
)
 
(51
)
 
 
 
 
Total long-term debt (annual interest requirement — $330 million)
8,124

 
7,628

 
 
 
 
Less amount due within one year
201

 

 
 
 
 
Long-term debt excluding amount due within one year
7,923

 
7,628

 
50.4
%
 
51.7
%
Redeemable Preferred Stock:
 
 
 
 
 
 
 
Cumulative redeemable preferred stock
 
 
 
 
 
 
 
$100 par or stated value — 4.20% to 4.92%
 
 
 
 
 
 
 
Authorized — 3,850,000 shares
 
 
 
 
 
 
 
Outstanding — 475,115 shares
48

 
48

 
 
 
 
$1 par value — 5.00%
 
 
 
 
 
 
 
Authorized — 27,500,000 shares
 
 
 
 
 
 
 
Outstanding — 10,000,000 shares: $25 stated value
243

 
243

 
 
 
 
Total redeemable preferred stock
(annual dividend requirement — $15 million)
291

 
291

 
1.9

 
2.0

Common Stockholder's Equity:
 
 
 
 
 
 
 
Common stock, par value $40 per share —
 
 
 
 
 
 
 
Authorized — 40,000,000 shares
 
 
 
 
 
 
 
Outstanding — 30,537,500 shares
1,222

 
1,222

 
 
 
 
Paid-in capital
3,508

 
2,986

 
 
 
 
Retained earnings
2,775

 
2,647

 
 
 
 
Accumulated other comprehensive loss
(28
)
 
(26
)
 
 
 
 
Total common stockholder's equity
7,477

 
6,829

 
47.7

 
46.3

Total Capitalization
$
15,691

 
$
14,748

 
100.0
%
 
100.0
%
 The accompanying notes are an integral part of these financial statements.

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     Table of Contents                                  Index to Financial Statements


STATEMENTS OF COMMON STOCKHOLDER'S EQUITY
For the Years Ended December 31, 2018 , 2017 , and 2016
Alabama Power Company 2018 Annual Report

 
Number of
Common
Shares
Issued
 
Common
Stock
 
Paid-In
Capital
 
Retained
Earnings
 
Accumulated
Other
Comprehensive
Income (Loss)
 
Total
 
(in millions)
Balance at December 31, 2015
31

 
$
1,222

 
$
2,341

 
$
2,461

 
$
(32
)
 
$
5,992

Net income after dividends on
preferred and preference stock

 

 

 
822

 

 
822

Capital contributions from parent company

 

 
272

 

 

 
272

Other comprehensive income (loss)

 

 

 

 
2

 
2

Cash dividends on common stock

 

 

 
(765
)
 

 
(765
)
Balance at December 31, 2016
31

 
1,222

 
2,613

 
2,518

 
(30
)
 
6,323

Net income after dividends on
preferred and preference stock

 

 

 
848

 

 
848

Capital contributions from parent company

 

 
373

 

 

 
373

Other comprehensive income (loss)

 

 

 

 
4

 
4

Cash dividends on common stock

 

 

 
(714
)
 

 
(714
)
Other

 

 

 
(5
)
 

 
(5
)
Balance at December 31, 2017
31

 
1,222

 
2,986

 
2,647

 
(26
)
 
6,829

Net income after dividends on
preferred and preference stock

 

 

 
930

 

 
930

Capital contributions from parent company

 

 
522

 

 

 
522

Other comprehensive income (loss)

 

 

 

 
4

 
4

Cash dividends on common stock

 

 

 
(801
)
 

 
(801
)
Other

 

 

 
(1
)
 
(6
)
 
(7
)
Balance at December 31, 2018
31

 
$
1,222

 
$
3,508

 
$
2,775

 
$
(28
)
 
$
7,477

The accompanying notes are an integral part of these financial statements.


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     Table of Contents                                  Index to Financial Statements


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Georgia Power Company
Opinion on the Financial Statements
We have audited the accompanying balance sheets and statements of capitalization of Georgia Power Company (Georgia Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2018 and 2017 , the related statements of income, comprehensive income, common stockholder's equity, and cash flows for each of the three years in the period ended December 31, 2018 , and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of Georgia Power as of December 31, 2018 and 2017 , and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018 , in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of Georgia Power's management. Our responsibility is to express an opinion on Georgia Power's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to Georgia Power in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Georgia Power is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of Georgia Power's internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2019
We have served as Georgia Power's auditor since 2002.

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     Table of Contents                                  Index to Financial Statements

STATEMENTS OF INCOME
For the Years Ended December 31, 2018 , 2017 , and 2016
Georgia Power Company 2018 Annual Report
 
 
2018

 
2017

 
2016

 
(in millions)
Operating Revenues:
 
 
 
 
 
Retail revenues
$
7,752

 
$
7,738

 
$
7,772

Wholesale revenues, non-affiliates
163

 
163

 
175

Wholesale revenues, affiliates
24

 
26

 
42

Other revenues
481

 
383

 
394

Total operating revenues
8,420

 
8,310

 
8,383

Operating Expenses:
 
 
 
 
 
Fuel
1,698

 
1,671

 
1,807

Purchased power, non-affiliates
430

 
416

 
361

Purchased power, affiliates
723

 
622

 
518

Other operations and maintenance
1,860

 
1,724

 
2,003

Depreciation and amortization
923

 
895

 
855

Taxes other than income taxes
437

 
409

 
405

Estimated loss on Plant Vogtle Units 3 and 4
1,060

 

 

Total operating expenses
7,131

 
5,737

 
5,949

Operating Income
1,289

 
2,573

 
2,434

Other Income and (Expense):
 
 
 
 
 
Interest expense, net of amounts capitalized
(397
)
 
(419
)
 
(388
)
Other income (expense), net
115

 
104

 
81

Total other income and (expense)
(282
)
 
(315
)
 
(307
)
Earnings Before Income Taxes
1,007

 
2,258

 
2,127

Income taxes
214

 
830

 
780

Net Income
793

 
1,428

 
1,347

Dividends on Preferred and Preference Stock

 
14

 
17

Net Income After Dividends on Preferred and Preference Stock
$
793

 
$
1,414

 
$
1,330

The accompanying notes are an integral part of these financial statements.

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     Table of Contents                                  Index to Financial Statements

STATEMENTS OF COMPREHENSIVE INCOME
For the Years Ended December 31, 2018 , 2017 , and 2016
Georgia Power Company 2018 Annual Report
 
 
2018

 
2017

 
2016

 
(in millions)
Net Income
$
793

 
$
1,428

 
$
1,347

Other comprehensive income (loss):
 
 
 
 
 
Qualifying hedges:
 
 
 
 
 
Reclassification adjustment for amounts included in net income,
net of tax of $1, $1, and $2, respectively
3

 
3

 
2

Total other comprehensive income (loss)
3

 
3

 
2

Comprehensive Income
$
796

 
$
1,431

 
$
1,349

The accompanying notes are an integral part of these financial statements.
 

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     Table of Contents                                  Index to Financial Statements

STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2018 , 2017 , and 2016
Georgia Power Company 2018 Annual Report
 
2018

 
2017

 
2016

 
(in millions)
Operating Activities:
 
 
 
 
 
Net income
$
793

 
$
1,428

 
$
1,347

Adjustments to reconcile net income
to net cash provided from operating activities —
 
 
 
 
 
Depreciation and amortization, total
1,142

 
1,100

 
1,063

Deferred income taxes
(260
)
 
458

 
383

Pension, postretirement, and other employee benefits
(75
)
 
(68
)
 
(33
)
Pension and postretirement funding

 

 
(287
)
Settlement of asset retirement obligations
(116
)
 
(120
)
 
(123
)
Other deferred charges — affiliated

 

 
(111
)
Estimated loss on Plant Vogtle Units 3 and 4
1,060

 

 

Other, net
(21
)
 
(83
)
 
(25
)
Changes in certain current assets and liabilities —
 
 
 
 
 
-Receivables
8

 
(256
)
 
60

-Fossil fuel stock
83

 
(16
)
 
104

-Prepaid income taxes
152

 
(168
)
 

-Other current assets
(43
)
 
(28
)
 
(38
)
-Accounts payable
95

 
(219
)
 
(42
)
-Accrued taxes
58

 
1

 
131

-Retail fuel cost over recovery

 
(84
)
 
(32
)
-Other current liabilities
(107
)
 
(33
)
 
28

Net cash provided from operating activities
2,769

 
1,912

 
2,425

Investing Activities:
 
 
 
 
 
Property additions
(3,116
)
 
(2,704
)
 
(2,223
)
Proceeds pursuant to the Toshiba Guarantee, net of joint owner portion            

 
1,682

 

Nuclear decommissioning trust fund purchases
(839
)
 
(574
)
 
(808
)
Nuclear decommissioning trust fund sales
833

 
568

 
803

Cost of removal, net of salvage
(107
)
 
(100
)
 
(83
)
Change in construction payables, net of joint owner portion
68

 
223

 
(35
)
Payments pursuant to LTSAs
(54
)
 
(64
)
 
(34
)
Proceeds from asset dispositions
138

 
96

 
10

Other investing activities
(32
)
 
(39
)
 
23

Net cash used for investing activities
(3,109
)
 
(912
)
 
(2,347
)
Financing Activities:
 
 
 
 
 
Increase (decrease) in notes payable, net
294

 
(391
)
 
234

Proceeds —
 
 
 
 
 
Capital contributions from parent company
2,985

 
431

 
594

Senior notes

 
1,350

 
650

Short-term borrowings

 
700

 

Other long-term debt

 
370

 

FFB loan

 

 
425

Pollution control revenue bonds issuances and remarketings
108

 
65

 

Redemptions and repurchases —
 
 
 
 
 
Senior notes
(1,500
)
 
(450
)
 
(700
)
Pollution control revenue bonds
(469
)
 
(65
)
 
(4
)
Short-term borrowings
(150
)
 
(550
)
 

Preferred and preference stock

 
(270
)
 

Other long-term debt
(100
)
 

 

Payment of common stock dividends
(1,396
)
 
(1,281
)
 
(1,305
)
Premiums on redemption and repurchases of senior notes
(152
)
 

 

Other financing activities
(20
)
 
(60
)
 
(36
)
Net cash used for financing activities
(400
)
 
(151
)
 
(142
)
Net Change in Cash, Cash Equivalents, and Restricted Cash
(740
)
 
849

 
(64
)
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year
852

 
3

 
67

Cash, Cash Equivalents, and Restricted Cash at End of Year
$
112

 
$
852

 
$
3

Supplemental Cash Flow Information:
 
 
 
 
 
Cash paid during the period for —
 
 
 
 
 
Interest (net of $26, $23, and $20 capitalized, respectively)
$
408

 
$
386

 
$
375

Income taxes (net of refunds)
300

 
496

 
170

Noncash transactions — Accrued property additions at year-end
683

 
550

 
336

The accompanying notes are an integral part of these financial statements.

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BALANCE SHEETS
At December 31, 2018 and 2017
Georgia Power Company 2018 Annual Report
 
Assets
2018

 
2017

 
(in millions)
Current Assets:
 
 
 
Cash and cash equivalents
$
4

 
$
852

Restricted cash
108

 

Receivables —
 
 
 
Customer accounts receivable
591

 
544

Unbilled revenues
208

 
255

Under recovered fuel clause revenues
115

 
165

Joint owner accounts receivable
170

 
262

Affiliated
39

 
24

Other accounts and notes receivable
80

 
76

Accumulated provision for uncollectible accounts
(2
)
 
(3
)
Fossil fuel stock
231

 
314

Materials and supplies
519

 
504

Prepaid expenses
142

 
216

Other regulatory assets, current
199

 
205

Other current assets
70

 
14

Total current assets
2,474

 
3,428

Property, Plant, and Equipment:
 
 
 
In service
37,675

 
34,861

Less: Accumulated provision for depreciation
12,096

 
11,704

Plant in service, net of depreciation
25,579

 
23,157

Nuclear fuel, at amortized cost
550

 
544

Construction work in progress
4,833

 
4,613

Total property, plant, and equipment
30,962

 
28,314

Other Property and Investments:
 
 
 
Equity investments in unconsolidated subsidiaries
51

 
53

Nuclear decommissioning trusts, at fair value
873

 
929

Miscellaneous property and investments
72

 
59

Total other property and investments
996

 
1,041

Deferred Charges and Other Assets:
 
 
 
Deferred charges related to income taxes
517

 
516

Other regulatory assets, deferred
4,902

 
2,932

Other deferred charges and assets
514

 
548

Total deferred charges and other assets
5,933

 
3,996

Total Assets
$
40,365

 
$
36,779

The accompanying notes are an integral part of these financial statements.


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     Table of Contents                                  Index to Financial Statements

BALANCE SHEETS
At December 31, 2018 and 2017
Georgia Power Company 2018 Annual Report
 
Liabilities and Stockholder's Equity
2018

 
2017

 
(in millions)
Current Liabilities:
 
 
 
Securities due within one year
$
617

 
$
857

Notes payable
294

 
150

Accounts payable —
 
 
 
Affiliated
575

 
493

Other
890

 
834

Customer deposits
276

 
270

Accrued taxes
377

 
344

Accrued interest
105

 
123

Accrued compensation
221

 
219

Asset retirement obligations, current
202

 
270

Other regulatory liabilities, current
169

 
191

Other current liabilities
183

 
198

Total current liabilities
3,909

 
3,949

Long-Term Debt  (See accompanying statements)
9,364

 
11,073

Deferred Credits and Other Liabilities:
 
 
 
Accumulated deferred income taxes
3,062

 
3,175

Deferred credits related to income taxes
3,080

 
3,248

Accumulated deferred ITCs
262

 
248

Employee benefit obligations
599

 
659

Asset retirement obligations, deferred
5,627

 
2,368

Other deferred credits and liabilities
139

 
128

Total deferred credits and other liabilities
12,769

 
9,826

Total Liabilities
26,042

 
24,848

Common Stockholder's Equity  (See accompanying statements)
14,323

 
11,931

Total Liabilities and Stockholder's Equity
$
40,365

 
$
36,779

Commitments and Contingent Matters  (See notes)

 

The accompanying notes are an integral part of these financial statements.
 

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STATEMENTS OF CAPITALIZATION
At December 31, 2018 and 2017
Georgia Power Company 2018 Annual Report
 
 
2018

 
2017

 
2018

 
2017

 
(in millions)
 
(percent of total)
Long-Term Debt:
 
 
 
 
 
 
 
Long-term notes payable —
 
 
 
 
 
 
 
1.95% to 5.40% due 2018
$

 
$
747

 
 
 
 
4.25% due 2019
498

 
499

 
 
 
 
2.00% due 2020
950

 
950

 
 
 
 
2.40% due 2021
325

 
325

 
 
 
 
2.85% due 2022
400

 
400

 
 
 
 
5.75% due 2023
100

 
100

 
 
 
 
3.25% to 5.95% due 2026-2043
3,325

 
4,075

 
 
 
 
Variable rate (2.29% at 12/31/17) due 2018

 
100

 
 
 
 
Total long-term notes payable
5,598

 
7,196

 
 
 
 
Other long-term debt —
 
 
 
 
 
 
 
Pollution control revenue bonds —
 
 
 
 
 
 
 
2.35% due 2022
53

 
53

 
 
 
 
1.55% to 4.00% due 2025-2049
748

 
940

 
 
 
 
Variable rate (1.77% to 1.78% at 12/31/18) due 2019
108

 
108

 
 
 
 
Variable rates (1.70% to 1.83% at 12/31/18) due 2026-2052
551

 
720

 
 
 
 
FFB loans —
 
 
 
 
 
 
 
2.57% to 3.86% due 2020
44

 
44

 
 
 
 
2.57% to 3.86% due 2021
44

 
44

 
 
 
 
2.57% to 3.86% due 2022
44

 
44

 
 
 
 
2.57% to 3.86% due 2023
44

 
44

 
 
 
 
2.57% to 3.86% due 2024-2044
2,449

 
2,449

 
 
 
 
Junior subordinated note (5.00%) due 2077
270

 
270

 
 
 
 
Total other long-term debt
4,355

 
4,716

 
 
 
 
Capitalized lease obligations
142

 
154

 
 
 
 
Unamortized debt premium (discount), net
(6
)
 
(12
)
 
 
 
 
Unamortized debt issuance expense
(108
)
 
(124
)
 
 
 
 
Total long-term debt (annual interest requirement — $356 million)
9,981

 
11,930

 
 
 
 
Less amount due within one year
617

 
857

 
 
 
 
Long-term debt excluding amount due within one year
9,364

 
11,073

 
39.5
%
 
48.1
%
Common Stockholder's Equity:
 
 
 
 
 
 
 
Common stock, without par value —
 
 
 
 
 
 
 
Authorized — 20,000,000 shares
 
 
 
 
 
 
 
Outstanding — 9,261,500 shares
398

 
398

 
 
 
 
Paid-in capital
10,322

 
7,328

 
 
 
 
Retained earnings
3,612

 
4,215

 
 
 
 
Accumulated other comprehensive loss
(9
)
 
(10
)
 
 
 
 
Total common stockholder's equity
14,323

 
11,931

 
60.5

 
51.9

Total Capitalization
$
23,687

 
$
23,004

 
100.0
%
 
100.0
%
The accompanying notes are an integral part of these financial statements.
 

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STATEMENTS OF COMMON STOCKHOLDER'S EQUITY
For the Years Ended December 31, 2018 , 2017 , and 2016
Georgia Power Company 2018 Annual Report
 
 
Number of Common Shares Issued
 
Common Stock
 
Paid-In Capital
 
Retained Earnings
 
Accumulated Other Comprehensive Income (Loss)
 
Total
 
(in millions)
Balance at December 31, 2015
9

 
$
398

 
$
6,275

 
$
4,061

 
$
(15
)
 
$
10,719

Net income after dividends on
preferred and preference stock

 

 

 
1,330

 

 
1,330

Capital contributions from parent company

 

 
610

 

 

 
610

Other comprehensive income (loss)

 

 

 

 
2

 
2

Cash dividends on common stock

 

 

 
(1,305
)
 

 
(1,305
)
Balance at December 31, 2016
9

 
398

 
6,885

 
4,086

 
(13
)
 
11,356

Net income after dividends on
preferred and preference stock

 

 

 
1,414

 

 
1,414

Capital contributions from parent company

 

 
443

 

 

 
443

Other comprehensive income (loss)

 

 

 

 
3

 
3

Cash dividends on common stock

 

 

 
(1,281
)
 

 
(1,281
)
Other

 

 

 
(4
)
 

 
(4
)
Balance at December 31, 2017
9

 
398

 
7,328

 
4,215

 
(10
)
 
11,931

Net income after dividends on
preferred and preference stock

 

 

 
793

 

 
793

Capital contributions from parent company

 

 
2,994

 

 

 
2,994

Other comprehensive income (loss)

 

 

 

 
3

 
3

Cash dividends on common stock

 

 

 
(1,396
)
 

 
(1,396
)
Other

 

 

 

 
(2
)
 
(2
)
Balance at December 31, 2018
9

 
$
398

 
$
10,322

 
$
3,612

 
$
(9
)
 
$
14,323

The accompanying notes are an integral part of these financial statements.
 

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Mississippi Power Company
Opinion on the Financial Statements
We have audited the accompanying balance sheets and statements of capitalization of Mississippi Power Company (Mississippi Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2018 and 2017 , the related statements of operations, comprehensive income (loss), common stockholder's equity, and cash flows for each of the three years in the period ended December 31, 2018 , and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of Mississippi Power as of December 31, 2018 and 2017 , and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018 , in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of Mississippi Power's management. Our responsibility is to express an opinion on Mississippi Power's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to Mississippi Power in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Mississippi Power is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of Mississippi Power's internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2019
We have served as Mississippi Power's auditor since 2002.


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     Table of Contents                                  Index to Financial Statements

STATEMENTS OF OPERATIONS
For the Years Ended December 31, 2018 , 2017 , and 2016
Mississippi Power Company 2018 Annual Report

 
2018

 
2017

 
2016

 
(in millions)
Operating Revenues:
 
 
 
 
 
Retail revenues
$
889

 
$
854

 
$
859

Wholesale revenues, non-affiliates
263

 
259

 
261

Wholesale revenues, affiliates
91

 
56

 
26

Other revenues
22

 
18

 
17

Total operating revenues
1,265

 
1,187

 
1,163

Operating Expenses:
 
 
 
 
 
Fuel
405

 
395

 
343

Purchased power
41

 
25

 
34

Other operations and maintenance
313

 
291

 
317

Depreciation and amortization
169

 
161

 
132

Taxes other than income taxes
107

 
104

 
109

Estimated loss on Kemper IGCC
37

 
3,362

 
428

Total operating expenses
1,072

 
4,338

 
1,363

Operating Income (Loss)
193

 
(3,151
)
 
(200
)
Other Income and (Expense):
 
 
 
 
 
Allowance for equity funds used during construction

 
72

 
124

Interest expense, net of amounts capitalized
(76
)
 
(42
)
 
(74
)
Other income (expense), net
17

 
1

 
(2
)
Total other income and (expense)
(59
)
 
31

 
48

Earnings (Loss) Before Income Taxes
134

 
(3,120
)
 
(152
)
Income taxes (benefit)
(102
)
 
(532
)
 
(104
)
Net Income (Loss)
236

 
(2,588
)
 
(48
)
Dividends on Preferred Stock
1

 
2

 
2

Net Income (Loss) After Dividends on Preferred Stock
$
235

 
$
(2,590
)
 
$
(50
)
The accompanying notes are an integral part of these financial statements.

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STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
For the Years Ended December 31, 2018 , 2017 , and 2016
Mississippi Power Company 2018 Annual Report

 
2018

 
2017

 
2016

 
(in millions)
Net Inco me (Loss)
$
236

 
$
(2,588
)
 
$
(48
)
Other comprehensive income (loss):
 
 
 
 
 
Qualifying hedges:
 
 
 
 
 
Changes in fair value, net of tax of $(1), $(1), and $1,
respectively
(1
)
 
(1
)
 
1

Reclassification adjustment for amounts included in net income,
net of tax of $-, $1, and $1, respectively
1

 
1

 
1

Total other comprehensive income (loss)

 

 
2

Comprehensive Income (Loss)
$
236

 
$
(2,588
)
 
$
(46
)
The accompanying notes are an integral part of these financial statements.


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     Table of Contents                                  Index to Financial Statements

STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2018 , 2017 , and 2016
Mississippi Power Company 2018 Annual Report
 
2018

 
2017

 
2016

 
(in millions)
Operating Activities:
 
 
 
 
 
Net income (loss)
$
236

 
$
(2,588
)
 
$
(48
)
Adjustments to reconcile net income (loss)
to net cash provided from operating activities —
 
 
 
 
 
Depreciation and amortization, total
177

 
198

 
157

Deferred income taxes
475

 
(727
)
 
(67
)
Allowance for equity funds used during construction

 
(72
)
 
(124
)
Pension and postretirement funding

 

 
(47
)
Settlement of asset retirement obligations
(35
)
 
(23
)
 
(23
)
Estimated loss on Kemper IGCC
33

 
3,179

 
428

Other, net
18

 
(8
)
 
(9
)
Changes in certain current assets and liabilities —
 
 
 
 
 
-Receivables
(19
)
 
540

 
13

-Fossil fuel stock
(3
)
 
24

 
4

-Prepaid income taxes
(12
)
 

 
39

-Other current assets
(7
)
 
(13
)
 
(12
)
-Accounts payable
15

 
(3
)
 
(14
)
-Accrued interest
(1
)
 
(29
)
 
27

-Accrued taxes
(46
)
 
80

 
14

-Over recovered regulatory clause revenues
14

 
(51
)
 
(45
)
-Customer liability associated with Kemper refunds

 
(1
)
 
(73
)
-Other current liabilities
(41
)
 
(3
)
 
9

Net cash provided from operating activities
804

 
503

 
229

Investing Activities:
 
 
 
 
 
Property additions
(188
)
 
(429
)
 
(798
)
Construction payables
4

 
(47
)
 
(26
)
Government grant proceeds

 

 
137

Payments pursuant to LTSAs
(29
)
 
(10
)
 
10

Other investing activities
(19
)
 
(18
)
 
(20
)
Net cash used for investing activities
(232
)
 
(504
)
 
(697
)
Financing Activities:
 
 
 
 
 
Decrease in notes payable, net
(4
)
 
(18
)
 

Proceeds —
 
 
 
 
 
Capital contributions from parent company
15

 
1,002

 
627

Senior notes
600

 

 

Long-term debt issuance to parent company

 
40

 
200

Other long-term debt

 

 
1,200

Short-term borrowings
300

 
109

 

Redemptions —
 
 
 
 
 
Preferred stock
(33
)
 

 

Pollution control revenue bonds
(43
)
 

 

Short-term borrowings
(300
)
 
(109
)
 
(478
)
Long-term debt to parent company

 
(591
)
 
(225
)
Capital leases

 
(71
)
 
(3
)
Senior notes
(155
)
 
(35
)
 
(300
)
Other long-term debt
(900
)
 
(300
)
 
(425
)
Other financing activities
(7
)
 
(2
)
 
(2
)
Net cash provided from (used for) financing  activities
(527
)
 
25

 
594

Net Change in Cash, Cash Equivalents, and Restricted Cash
45

 
24

 
126

Cash, Cash Equivalents, and Restricted Cash at Beginning of Year
248

 
224

 
98

Cash, Cash Equivalents, and Restricted Cash at End of Year
$
293

 
$
248

 
$
224

Supplemental Cash Flow Information:
 
 
 
 
 
Cash paid (received) during the period for —
 
 
 
 
 
Interest (net of $-, $29, and $49 capitalized, respectively)
$
80

 
$
65

 
$
50

Income taxes (net of refunds)
(525
)
 
(424
)
 
(97
)
Noncash transactions — Accrued property additions at year-end
35

 
32

 
78

The accompanying notes are an integral part of these financial statements. 

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BALANCE SHEETS
At December 31, 2018 and 2017
Mississippi Power Company 2018 Annual Report

Assets
2018

 
2017

 
(in millions)
Current Assets:
 
 
 
Cash and cash equivalents
$
293

 
$
248

Receivables —
 
 
 
Customer accounts receivable
34

 
36

Unbilled revenues
41

 
41

Affiliated
21

 
16

Other accounts and notes receivable
31

 
16

Fossil fuel stock
20

 
17

Materials and supplies, current
53

 
44

Other regulatory assets, current
116

 
125

Prepaid income taxes
12

 

Other current assets
7

 
9

Total current assets
628

 
552

Property, Plant, and Equipment:
 
 
 
In service
4,900

 
4,773

Less: Accumulated provision for depreciation
1,429

 
1,325

Plant in service, net of depreciation
3,471

 
3,448

Construction work in progress
103

 
84

Total property, plant, and equipment
3,574

 
3,532

Other Property and Investments
24

 
30

Deferred Charges and Other Assets:
 
 
 
Deferred charges related to income taxes
33

 
35

Other regulatory assets, deferred
474

 
437

Accumulated deferred income taxes
150

 
247

Other deferred charges and assets
3

 
33

Total deferred charges and other assets
660

 
752

Total Assets
$
4,886

 
$
4,866

The accompanying notes are an integral part of these financial statements.


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     Table of Contents                                  Index to Financial Statements

BALANCE SHEETS
At December 31, 2018 and 2017
Mississippi Power Company 2018 Annual Report

Liabilities and Stockholder's Equity
2018

 
2017

 
(in millions)
Current Liabilities:
 
 
 
Securities due within one year
$
40

 
$
989

Notes payable

 
4

Accounts payable —
 
 
 
Affiliated
60

 
59

Other
90

 
96

Accrued taxes —
 
 
 
Accrued income taxes

 
40

Other accrued taxes
95

 
101

Accrued interest
15

 
16

Accrued compensation
38

 
39

Accrued plant closure costs
29

 
35

Asset retirement obligations, current
34

 
37

Over recovered regulatory clause liabilities
14

 

Other current liabilities
40

 
47

Total current liabilities
455

 
1,463

Long-Term Debt  ( See accompanying statements )
1,539

 
1,097

Deferred Credits and Other Liabilities:
 
 
 
Accumulated deferred income taxes
378

 

Deferred credits related to income taxes
382

 
372

Employee benefit obligations
115

 
116

Asset retirement obligations, deferred
126

 
137

Other cost of removal obligations
185

 
178

Other regulatory liabilities, deferred
81

 
79

Other deferred credits and liabilities
16

 
33

Total deferred credits and other liabilities
1,283

 
915

Total Liabilities
3,277

 
3,475

Cumulative Redeemable Preferred Stock  ( See accompanying statements )

 
33

Common Stockholder's Equity ( See accompanying statements )
1,609

 
1,358

Total Liabilities and Stockholder's Equity
$
4,886

 
$
4,866

Commitments and Contingent Matters  ( See notes )

 

The accompanying notes are an integral part of these financial statements.
 

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STATEMENTS OF CAPITALIZATION
At December 31, 2018 and 2017
Mississippi Power Company 2018 Annual Report

 
2018
 
2017
 
2018
 
2017
 
(in millions)
 
(percent of total)
Long-Term Debt:
 
 
 
 
 
 
 
Long-term notes payable —
 
 
 
 
 
 
 
5.55% due 2019
$

 
$
125

 
 
 
 
1.63% to 5.40% due 2028-2042
950

 
680

 
 
 
 
Adjustable rate (3.05% at 12/31/17) due 2018

 
900

 
 
 
 
Adjustable rate (3.47% at 12/31/18) due 2020
300

 

 
 
 
 
Total long-term notes payable
1,250

 
1,705

 
 
 
 
Other long-term debt —
 
 
 
 
 
 
 
Pollution control revenue bonds —
 
 
 
 
 
 
 
5.15% due 2028

 
43

 
 
 
 
Variable rates (2.20% to 2.23% at 12/31/18) due 2019
40

 
40

 
 
 
 
Plant Daniel revenue bonds (7.13%) due 2021
270

 
270

 
 
 
 
Total other long-term debt
310

 
353

 
 
 
 
Unamortized debt premium
29

 
36

 
 
 
 
Unamortized debt discount
(2
)
 
(1
)
 
 
 
 
Unamortized debt issuance expense
(8
)
 
(7
)
 
 
 
 
Total long-term debt (annual interest requirement — $70 million)
1,579

 
2,086

 
 
 
 
Less amount due within one year
40

 
989

 
 
 
 
Long-term debt excluding amount due within one year
1,539

 
1,097

 
48.9
%
 
44.1
%
Cumulative Redeemable Preferred Stock:
 
 
 
 
 
 
 
$100 par value — 4.40% to 5.25%
 
 
 
 
 
 
 
Authorized — 1,244,139 shares
 
 
 
 
 
 
 
Outstanding — 2018: no shares
 
 
 
 
 
 
 
      — 2017: 334,210 shares

 
33

 

 
1.3

Common Stockholder's Equity:
 
 
 
 
 
 
 
Common stock, without par value —
 
 
 
 
 
 
 
Authorized — 1,130,000 shares

 

 
 
 
 
Outstanding — 1,121,000 shares
38

 
38

 
 
 
 
Paid-in capital
4,546

 
4,529

 
 
 
 
Accumulated deficit
(2,971
)
 
(3,205
)
 
 
 
 
Accumulated other comprehensive loss
(4
)
 
(4
)
 
 
 
 
Total common stockholder's equity
1,609

 
1,358

 
51.1

 
54.6

Total Capitalization
$
3,148

 
$
2,488

 
100.0
%
 
100.0
%
The accompanying notes are an integral part of these financial statements.
 

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STATEMENTS OF COMMON STOCKHOLDER'S EQUITY
For the Years Ended December 31, 2018 , 2017 , and 2016
Mississippi Power Company 2018 Annual Report

 
Number of Common Shares Issued
 
Common
Stock
 
Paid-In Capital
 
Retained Earnings (Accumulated Deficit)
 
Accumulated Other Comprehensive Income (Loss)
 
Total
 
(in millions)
Balance at December 31, 2015
1

 
$
38

 
$
2,893

 
$
(566
)
 
$
(6
)
 
$
2,359

Net loss after dividends on preferred stock

 

 

 
(50
)
 

 
(50
)
Capital contributions from parent company

 

 
632

 

 

 
632

Other comprehensive income (loss)

 

 

 

 
2

 
2

Balance at December 31, 2016
1

 
38

 
3,525

 
(616
)
 
(4
)
 
2,943

Net loss after dividends on preferred stock

 

 

 
(2,590
)
 

 
(2,590
)
Capital contributions from parent company

 

 
1,004

 

 

 
1,004

Other

 

 

 
1

 

 
1

Balance at December 31, 2017
1

 
38

 
4,529

 
(3,205
)
 
(4
)
 
1,358

Net income after dividends on preferred stock

 

 

 
235

 

 
235

Capital contributions from parent company

 

 
17

 

 

 
17

Other

 

 

 
(1
)
 

 
(1
)
Balance at December 31, 2018
1

 
$
38

 
$
4,546

 
$
(2,971
)
 
$
(4
)
 
$
1,609

The accompanying notes are an integral part of these financial statements.
 

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     Table of Contents                                  Index to Financial Statements


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Southern Power Company and Subsidiary Companies
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Southern Power Company and subsidiary companies (Southern Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2018 and 2017 , the related consolidated statements of income, comprehensive income, stockholders' equity, and cash flows for each of the three years in the period ended December 31, 2018 , and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of Southern Power as of December 31, 2018 and 2017 , and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018 , in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of Southern Power's management. Our responsibility is to express an opinion on Southern Power's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to Southern Power in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Southern Power is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of Southern Power's internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2019
We have served as Southern Power's auditor since 2002.

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     Table of Contents                                  Index to Financial Statements

CONSOLIDATED STATEMENTS OF INCOME
For the Years Ended December 31, 2018 , 2017 , and 2016
Southern Power Company and Subsidiary Companies 2018 Annual Report
 
 
2018

 
2017

 
2016

 
(in millions)
Operating Revenues:
 
 
 
 
 
Wholesale revenues, non-affiliates
$
1,757

 
$
1,671

 
$
1,146

Wholesale revenues, affiliates
435

 
392

 
419

Other revenues
13

 
12

 
12

Total operating revenues
2,205

 
2,075

 
1,577

Operating Expenses:
 
 
 
 
 
Fuel
699

 
621

 
456

Purchased power
176

 
149

 
102

Other operations and maintenance
395

 
386

 
354

Depreciation and amortization
493

 
503

 
352

Taxes other than income taxes
46

 
48

 
23

Asset impairment
156

 

 

Gain on disposition
(2
)
 

 

Total operating expenses
1,963

 
1,707

 
1,287

Operating Income
242

 
368

 
290

Other Income and (Expense):
 
 
 
 
 
Interest expense, net of amounts capitalized
(183
)
 
(191
)
 
(117
)
Other income (expense), net
23

 
1

 
6

Total other income and (expense)
(160
)
 
(190
)
 
(111
)
Earnings Before Income Taxes
82

 
178

 
179

Income taxes (benefit)
(164
)
 
(939
)
 
(195
)
Net Income
246

 
1,117

 
374

Net income attributable to noncontrolling interests
59

 
46

 
36

Net Income Attributable to Southern Power
$
187

 
$
1,071

 
$
338

The accompanying notes are an integral part of these consolidated financial statements.

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
For the Years Ended December 31, 2018 , 2017 , and 2016
Southern Power Company and Subsidiary Companies 2018 Annual Report
 
 
2018

 
2017

 
2016

 
(in millions)
Net Income
$
246

 
$
1,117

 
$
374

Other comprehensive income (loss):
 
 
 
 
 
Qualifying hedges:
 
 
 
 
 
Changes in fair value, net of tax of $(17), $39, and $(17), respectively
(51
)
 
63

 
(27
)
Reclassification adjustment for amounts included in net income,
net of tax of $19, $(46), and $36, respectively
58

 
(73
)
 
58

Pension and other postretirement benefit plans:
 
 
 
 
 
Benefit plan net gain (loss), net of tax of $2, $-, and $-, respectively
5

 

 

Reclassification adjustment for amounts included in net income, net of
tax of $-, $-, and $-, respectively
2

 

 

Total other comprehensive income (loss)
14

 
(10
)
 
31

Comprehensive income attributable to noncontrolling interests
59

 
46

 
36

Comprehensive Income Attributable to Southern Power
$
201

 
$
1,061

 
$
369

The accompanying notes are an integral part of these consolidated financial statements.
 


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CONSOLIDATED STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2018 , 2017 , and 2016
Southern Power Company and Subsidiary Companies 2018 Annual Report
 
2018

 
2017

 
2016

 
(in millions)
Operating Activities:
 
 
 
 
 
Net income
$
246

 
$
1,117

 
$
374

Adjustments to reconcile net income
to net cash provided from operating activities —
 
 
 
 
 
Depreciation and amortization, total
524

 
536

 
370

Deferred income taxes
(239
)
 
(263
)
 
(1,063
)
Amortization of investment tax credits
(58
)
 
(57
)
 
(37
)
Collateral deposits
17

 
(4
)
 
(102
)
Accrued income taxes, non-current
(14
)
 
14

 
(109
)
Income taxes receivable, non-current
42

 
(61
)
 
(13
)
Asset impairment
156

 

 

Other, net
(10
)
 
(9
)
 
12

Changes in certain current assets and liabilities —
 
 
 
 
 
-Receivables
(20
)
 
(60
)
 
(54
)
-Prepaid income taxes
25

 
24

 
(29
)
-Other current assets
(26
)
 
(28
)
 
4

-Accrued taxes
7

 
(55
)
 
940

-Other current liabilities
(19
)
 
1

 
46

Net cash provided from operating activities
631

 
1,155

 
339

Investing Activities:
 
 
 
 
 
Business acquisitions
(65
)
 
(1,016
)
 
(2,284
)
Property additions
(315
)
 
(268
)
 
(2,114
)
Change in construction payables
(6
)
 
(153
)
 
(57
)
Proceeds from disposition
203

 

 

Payments pursuant to LTSAs and for equipment not yet received
(75
)
 
(203
)
 
(350
)
Other investing activities
31

 
15

 
16

Net cash used for investing activities
(227
)
 
(1,625
)
 
(4,789
)
Financing Activities:
 
 
 
 
 
Increase (decrease) in notes payable, net
(105
)
 
(104
)
 
73

Proceeds —
 
 
 
 
 
Short-term borrowings
200

 

 

Capital contributions
2

 

 
1,850

Senior notes

 
525

 
2,831

Other long-term debt

 
43

 
65

Redemptions —
 
 
 
 
 
Senior notes
(350
)
 
(500
)
 
(200
)
Other long-term debt
(420
)
 
(18
)
 
(86
)
Short-term borrowings
(100
)
 

 

Return of capital
(1,650
)
 

 

Distributions to noncontrolling interests
(153
)
 
(119
)
 
(57
)
Capital contributions from noncontrolling interests
2,551

 
80

 
682

Purchase of membership interests from noncontrolling interests

 
(59
)
 
(129
)
Payment of common stock dividends
(312
)
 
(317
)
 
(272
)
Other financing activities
(26
)
 
(33
)
 
(30
)
Net cash provided from (used for) financing  activities
(363
)
 
(502
)
 
4,727

Net Change in Cash, Cash Equivalents, and Restricted Cash
41

 
(972
)
 
277

Cash, Cash Equivalents, and Restricted Cash at Beginning of Year
140

 
1,112

 
835

Cash, Cash Equivalents, and Restricted Cash at End of Year
$
181

 
$
140

 
$
1,112

Supplemental Cash Flow Information:
 
 
 
 
 
Cash paid (received) during the period for —
 
 
 
 
 
Interest (net of $17, $11, and $44 capitalized, respectively)
$
173

 
$
189

 
$
89

Income taxes (net of refunds and investment tax credits)
79

 
(487
)
 
116

Noncash transactions —
 
 
 
 
 
Accrued property additions at year-end
31

 
32

 
251

Accrued acquisitions at year-end

 

 
461

The accompanying notes are an integral part of these consolidated financial statements.

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CONSOLIDATED BALANCE SHEETS
At December 31, 2018 and 2017
Southern Power Company and Subsidiary Companies 2018 Annual Report

Assets
2018

 
2017

 
(in millions)
Current Assets:
 
 
 
Cash and cash equivalents
$
181

 
$
129

Receivables —
 
 
 
Customer accounts receivable
111

 
117

Affiliated
55

 
50

Other
116

 
98

Materials and supplies
220

 
278

Prepaid income taxes
25

 
50

Other current assets
37

 
36

Total current assets
745

 
758

Property, Plant, and Equipment:
 
 
 
In service
13,271

 
13,755

Less: Accumulated provision for depreciation
2,171

 
1,910

Plant in service, net of depreciation
11,100

 
11,845

Construction work in progress
430

 
511

Total property, plant, and equipment
11,530

 
12,356

Other Property and Investments:
 
 
 
Intangible assets, net of amortization of $61 and $47
at December 31, 2018 and December 31, 2017, respectively
345

 
411

Total other property and investments
345

 
411

Deferred Charges and Other Assets:
 
 
 
Prepaid LTSAs
98

 
118

Accumulated deferred income taxes
1,186

 
925

Income taxes receivable, non-current
30

 
72

Assets held for sale
576

 

Other deferred charges and assets
373

 
566

Total deferred charges and other assets
2,263

 
1,681

Total Assets
$
14,883

 
$
15,206

The accompanying notes are an integral part of these consolidated financial statements.

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CONSOLIDATED BALANCE SHEETS
At December 31, 2018 and 2017
Southern Power Company and Subsidiary Companies 2018 Annual Report

Liabilities and Stockholders' Equity
2018

 
2017

 
(in millions)
Current Liabilities:
 
 
 
Securities due within one year
$
599

 
$
770

Notes payable
100

 
105

Accounts payable —
 
 
 
Affiliated
92

 
102

Other
77

 
103

Accrued taxes
6

 
4

Liabilities held for sale, current
15

 

Other current liabilities
142

 
148

Total current liabilities
1,031

 
1,232

Long-Term Debt:
 
 
 
Senior notes —
 
 
 
1.95% due 2019

 
600

2.375% due 2020
300

 
300

2.50% due 2021
300

 
300

1.00% due 2022
687

 
720

2.75% due 2023
290

 
290

1.85% to 5.25% due 2025-2046
2,348

 
2,374

Other long-term debt —
 
 
 
Variable rate (3.34% at 12/31/18) due 2020
525

 
525

Unamortized debt premium (discount), net
(9
)
 
(10
)
Unamortized debt issuance expense
(23
)
 
(28
)
Total long-term debt
4,418

 
5,071

Deferred Credits and Other Liabilities:
 
 
 
Accumulated deferred income taxes
105

 
199

Accumulated deferred ITCs
1,832

 
1,884

Other deferred credits and liabilities
213

 
322

Total deferred credits and other liabilities
2,150

 
2,405

Total Liabilities
7,599

 
8,708

Common Stockholder's Equity:
 
 
 
Common stock, par value $0.01 per share —
 
 
 
Authorized — 1,000,000 shares
 
 
 
Outstanding — 1,000 shares

 

Paid-in capital
1,600

 
3,662

Retained earnings
1,352

 
1,478

Accumulated other comprehensive income (loss)
16

 
(2
)
Total common stockholder's equity
2,968

 
5,138

Noncontrolling Interests
4,316

 
1,360

Total Stockholders' Equity
7,284

 
6,498

Total Liabilities and Stockholders' Equity
$
14,883

 
$
15,206

Commitments and Contingent Matters  (See notes)

 

The accompanying notes are an integral part of these consolidated financial statements.

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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
For the Years Ended December 31, 2018 , 2017 , and 2016
Southern Power Company and Subsidiary Companies 2018 Annual Report
 
 
Number of Common Shares Issued
 
Common Stock
 
Paid-In Capital
 
Retained Earnings

 
Accumulated Other Comprehensive Income
 
Total Common Stockholder's Equity
 
Noncontrolling Interests (a)
 
Total
 
(in millions)
Balance at December 31, 2015

 
$

 
$
1,822

 
$
657

 
$
4

 
$
2,483

 
$
781

 
$
3,264

Net income attributable
   to Southern Power

 

 

 
338

 

 
338

 

 
338

Capital contributions from
   parent company

 

 
1,850

 

 

 
1,850

 

 
1,850

Other comprehensive income

 

 

 

 
31

 
31

 

 
31

Cash dividends on common
   stock

 

 

 
(272
)
 

 
(272
)
 

 
(272
)
Capital contributions from
   noncontrolling interests

 

 

 

 

 

 
618

 
618

Distributions to noncontrolling
   interests

 

 

 

 

 

 
(57
)
 
(57
)
Purchase of membership interests
   from noncontrolling interests

 

 

 

 

 

 
(129
)
 
(129
)
Net income attributable to
   noncontrolling interests

 

 

 

 

 

 
32

 
32

Other

 

 
(1
)
 
1

 

 

 

 

Balance at December 31, 2016

 

 
3,671

 
724

 
35

 
4,430

 
1,245

 
5,675

Net income attributable
   to Southern Power

 

 

 
1,071

 

 
1,071

 

 
1,071

Capital contributions to parent
   company, net

 

 
(2
)
 

 

 
(2
)
 

 
(2
)
Other comprehensive income

 

 

 

 
(10
)
 
(10
)
 

 
(10
)
Cash dividends on common
   stock

 

 

 
(317
)
 

 
(317
)
 

 
(317
)
Other comprehensive income
transfer from SCS
(b)

 

 

 

 
(27
)
 
(27
)
 

 
(27
)
Capital contributions from
   noncontrolling interests

 

 

 

 

 

 
79

 
79

Distributions to noncontrolling
   interests

 

 

 

 

 

 
(122
)
 
(122
)
Net income attributable to
   noncontrolling interests

 

 

 

 

 

 
44

 
44

Reclassification from redeemable
   noncontrolling interests

 

 

 

 

 

 
114

 
114

Other

 

 
(7
)
 

 

 
(7
)
 

 
(7
)
Balance at December 31, 2017

 

 
3,662

 
1,478

 
(2
)
 
5,138

 
1,360

 
6,498

Net income attributable
   to Southern Power

 

 

 
187

 

 
187

 

 
187

Return of capital to parent

 

 
(1,650
)
 

 

 
(1,650
)
 

 
(1,650
)
Capital contributions from parent
   company

 

 
2

 

 

 
2

 

 
2

Other comprehensive income

 

 

 

 
14

 
14

 

 
14

Cash dividends on common
   stock

 

 

 
(312
)
 

 
(312
)
 

 
(312
)
Capital contributions from
   noncontrolling interests

 

 

 

 

 

 
1,372

 
1,372

Distributions to noncontrolling
   interests

 

 

 

 

 

 
(164
)
 
(164
)
Net income attributable to
   noncontrolling interests

 

 

 

 

 

 
59

 
59

Sale of noncontrolling interests (c)

 

 
(417
)
 

 

 
(417
)
 
1,690

 
1,273

Other

 

 
3

 
(1
)
 
4

 
6

 
(1
)
 
5

Balance at December 31, 2018

 
$

 
$
1,600

 
$
1,352

 
$
16

 
$
2,968

 
$
4,316

 
$
7,284

(a)
Excludes redeemable noncontrolling interests. See Note 7 to the financial statements under "Noncontrolling Interests" for additional information.
(b)
In connection with Southern Power becoming a participant to the Southern Company qualified pension plan and other postretirement benefit plan, $27 million of other comprehensive income, net of tax of $9 million, was transferred from SCS.
(c)
See Note 15 under "Southern Power - Sales of Renewable Facility Interests" for additional information.
The accompanying notes are an integral part of these consolidated financial statements.

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     Table of Contents                                  Index to Financial Statements


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Southern Company Gas and Subsidiary Companies
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets and consolidated statements of capitalization of Southern Company Gas and subsidiary companies (Southern Company Gas) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2018 and 2017 , the related consolidated statements of income, comprehensive income, stockholders' equity, and cash flows for the years ended December 31, 2018 and 2017 and the six month periods ended June 30, 2016 (Predecessor) and December 31, 2016 (Successor), and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of Southern Company Gas as of December 31, 2018 and 2017 , and the results of its operations and its cash flows for the years ended December 31, 2018 and 2017 and the six months ended June 30, 2016 (Predecessor) and December 31, 2016 (Successor), in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of Southern Company Gas' management. Our responsibility is to express an opinion on Southern Company Gas' financial statements based on our audits. We did not audit the financial statements of Southern Natural Gas Company, L.L.C. (SNG), Southern Company Gas' investment in which is accounted for by the use of the equity method. The accompanying consolidated financial statements of Southern Company Gas include its equity investment in SNG of $1,261 million and $1,262 million as of December 31, 2018 and December 31, 2017 , respectively, and its earnings from its equity method investment in SNG of $131 million , $88 million , and $56 million for the years ended December 31, 2018 and 2017 and the six months ended December 31, 2016, respectively. Those statements were audited by other auditors whose reports (which express an unqualified opinion on SNG's financial statements and contain an emphasis of matter paragraph concerning the extent of its operations and relationships with affiliated entities) have been furnished to us, and our opinion, insofar as it relates to the amounts included for SNG, is based solely on the reports of the other auditors. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to Southern Company Gas in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Southern Company Gas is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of Southern Company Gas' internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits and the reports of the other auditors provide a reasonable basis for our opinion.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2019
We have served as Southern Company Gas' auditor since 2016.

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CONSOLIDATED STATEMENTS OF INCOME
Southern Company Gas and Subsidiary Companies 2018 Annual Report

 
 
Successor
 
 
Predecessor
 
 
For the year ended
December 31,
 
For the year ended
December 31,
 
July 1, 2016 through December 31,
 
 
January 1, 2016 through June 30,
 
 
2018
 
2017
 
2016
 
 
2016
 
 
(in millions)
 
 
(in millions)
Operating Revenues:
 
 
 
 
 
 
 
 
 
Natural gas revenues (includes revenue taxes of
$114, $100, $32, and $57 for the periods presented,
respectively)
 
$
3,874

 
$
3,787

 
$
1,591

 
 
$
1,845

Alternative revenue programs
 
(20
)
 
4

 
5

 
 
(4
)
Other revenues
 
55

 
129

 
56

 
 
64

Total operating revenues
 
3,909

 
3,920

 
1,652

 
 
1,905

Operating Expenses:
 
 
 
 
 
 
 
 
 
Cost of natural gas
 
1,539

 
1,601

 
613

 
 
755

Cost of other sales
 
12

 
29

 
10

 
 
14

Other operations and maintenance
 
981

 
945

 
480

 
 
452

Depreciation and amortization
 
500

 
501

 
238

 
 
206

Taxes other than income taxes
 
211

 
184

 
71

 
 
99

Goodwill impairment
 
42

 

 

 
 

Gain on dispositions, net
 
(291
)
 

 

 
 

Merger-related expenses
 

 

 
41

 
 
56

Total operating expenses
 
2,994

 
3,260

 
1,453

 
 
1,582

Operating Income
 
915

 
660

 
199

 
 
323

Other Income and (Expense):
 
 
 
 
 
 
 
 
 
Earnings from equity method investments
 
148

 
106

 
60

 
 
2

Interest expense, net of amounts capitalized
 
(228
)
 
(200
)
 
(81
)
 
 
(96
)
Other income (expense), net
 
1

 
44

 
12

 
 
3

Total other income and (expense)
 
(79
)
 
(50
)
 
(9
)
 
 
(91
)
Earnings Before Income Taxes
 
836

 
610

 
190

 
 
232

Income taxes
 
464

 
367

 
76

 
 
87

Net Income
 
372

 
243

 
114

 
 
145

Net income attributable to noncontrolling interest
 

 

 

 
 
14

Net Income Attributable to Southern Company Gas
 
$
372

 
$
243

 
$
114

 
 
$
131

The accompanying notes are an integral part of these consolidated financial statements.


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     Table of Contents                                  Index to Financial Statements

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Southern Company Gas and Subsidiary Companies 2018 Annual Report

 
 
Successor
 
 
Predecessor
 
 
For the year ended
December 31,
 
For the year ended
December 31,
 
July 1, 2016 through December 31,
 
 
January 1, 2016 through June 30,
 
 
2018
 
2017
 
2016
 
 
2016
 
 
(in millions)
 
 
(in millions)
Net Income
 
$
372

 
$
243

 
$
114

 
 
$
145

Other comprehensive income (loss):
 
 
 
 
 
 
 
 
 
Qualifying hedges:
 
 
 
 
 
 
 
 
 
Changes in fair value, net of tax of
$2, $(3), $(1), and $(23), respectively
 
5

 
(5
)
 
(1
)
 
 
(41
)
Reclassification adjustment for amounts included
in net income, net of tax of $(1), $-, $-, and $-,
respectively
 
(1
)
 
1

 

 
 
1

Pension and other postretirement benefit plans:
 
 
 
 
 
 
 
 
 
Benefit plan net gain (loss), net of tax of
$-, $-, $19, and $-, respectively
 

 
(1
)
 
27

 
 

Reclassification adjustment for amounts included
in net income, net of tax of $3, $-, $-, and $4,
respectively
 
(2
)
 

 

 
 
5

Total other comprehensive income (loss)
 
2

 
(5
)
 
26

 
 
(35
)
Comprehensive income attributable to
noncontrolling interest
 

 

 

 
 
14

Comprehensive Income Attributable to
Southern Company Gas
 
$
374

 
$
238

 
$
140

 
 
$
96

The accompanying notes are an integral part of these consolidated financial statements.


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     Table of Contents                                  Index to Financial Statements

CONSOLIDATED STATEMENTS OF CASH FLOWS
Southern Company Gas and Subsidiary Companies 2018 Annual Report
 
 
Successor
 
 
Predecessor
 
 
For the year ended
December 31,
 
For the year ended
December 31,
 
July 1, 2016 through December 31,
 
 
January 1,
2016 through June 30,
 
 
2018
 
2017
 
2016
 
 
2016
 
 
(in millions)
 
 
(in millions)
Operating Activities:
 
 
 
 
 
 
 
 
 
Net income
 
$
372

 
$
243

 
$
114

 
 
$
145

Adjustments to reconcile net income to net cash
provided from (used for) operating activities —
 
 
 
 
 
 
 
 
 
Depreciation and amortization, total
 
500

 
501

 
238

 
 
206

Deferred income taxes
 
(1
)
 
236

 
92

 
 
8

Pension and postretirement funding
 

 

 
(125
)
 
 

Hedge settlements
 

 

 
(35
)
 
 
(26
)
Goodwill impairment
 
42

 

 

 
 

Gain on dispositions, net
 
(291
)
 

 

 
 

Mark-to-market adjustments
 
(19
)
 
(24
)
 
(3
)
 
 
162

Other, net
 
(24
)
 
(51
)
 
(51
)
 
 
(57
)
Changes in certain current assets and liabilities —
 
 
 
 
 
 
 
 
 
-Receivables
 
(218
)
 
(94
)
 
(490
)
 
 
179

-Natural gas for sale, net of
   temporary LIFO liquidation
 
49

 
36

 
(226
)
 
 
273

-Prepaid income taxes
 
(42
)
 
(39
)
 
(23
)
 
 
151

-Other current assets
 
4

 
(24
)
 
(31
)
 
 
37

-Accounts payable
 
372

 
(20
)
 
194

 
 
43

-Accrued taxes
 
10

 
110

 
8

 
 
41

-Accrued compensation
 
32

 
15

 
(13
)
 
 
(21
)
-Other current liabilities
 
(22
)
 
(8
)
 
24

 
 
(30
)
Net cash provided from (used for) operating activities
 
764

 
881

 
(327
)
 
 
1,111

Investing Activities:
 
 
 
 
 
 
 
 
 
Property additions
 
(1,388
)
 
(1,514
)
 
(614
)
 
 
(509
)
Cost of removal, net of salvage
 
(96
)
 
(66
)
 
(40
)
 
 
(32
)
Change in construction payables, net
 
(37
)
 
72

 
22

 
 
(7
)
Investment in unconsolidated subsidiaries
 
(110
)
 
(145
)
 
(1,444
)
 
 
(14
)
Returned investment in unconsolidated subsidiaries
 
20

 
80

 
5

 
 
3

Proceeds from dispositions
 
2,609

 

 

 
 

Other investing activities
 

 
5

 
4

 
 
3

Net cash provided from (used for) inve sting activities
 
998

 
(1,568
)
 
(2,067
)
 
 
(556
)
Financing Activities:
 
 
 
 
 
 
 
 
 
Increase (decrease) in notes payable, net
 
(868
)
 
262

 
1,143

 
 
(896
)
Proceeds —
 
 
 
 
 
 
 
 
 
First mortgage bonds
 
300

 
400

 

 
 
250

Capital contributions from parent company
 
24

 
103

 
1,085

 
 

Senior notes
 

 
450

 
900

 
 
350

Redemptions and repurchases —
 
 
 
 
 
 
 
 
 
Gas facility revenue bonds
 
(200
)
 

 

 
 

Medium-term notes
 

 
(22
)
 

 
 

First mortgage bonds
 

 

 

 
 
(125
)
Senior notes
 
(155
)
 

 
(420
)
 
 

Return of capital
 
(400
)
 

 

 
 

Distribution to noncontrolling interest
 

 

 
(15
)
 
 
(19
)
Purchase of 15% noncontrolling interest in SouthStar
 

 

 
(160
)
 
 

Payment of common stock dividends
 
(468
)
 
(443
)
 
(126
)
 
 
(128
)
Other financing activities
 
(3
)
 
(9
)
 
(8
)
 
 
10

Net cash provided from (used for) financing activities
 
(1,770
)
 
741

 
2,399

 
 
(558
)
Net Change in Cash, Cash Equivalents, and Restricted Cash
 
(8
)
 
54

 
5

 
 
(3
)
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year
 
78

 
24

 
19

 
 
22

Cash, Cash Equivalents, and Restricted Cash at End of Year
 
$
70

 
$
78

 
$
24

 
 
$
19

Supplemental Cash Flow Information:
 
 
 
 
 
 
 
 
 
Cash paid (received) during the period for —
 
 
 
 
 
 
 
 
 
Interest (net of $7, $11, $4, and $3 capitalized, respectively)
 
$
249

 
$
223

 
$
135

 
 
$
119

Income taxes, net
 
524

 
72

 
23

 
 
(100
)
Noncash transactions — Accrued property additions at year-end
 
97

 
135

 
63

 
 
41

The accompanying notes are an integral part of these consolidated financial statements.

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CONSOLIDATED BALANCE SHEETS
At December 31, 2018 and 2017
Southern Company Gas and Subsidiary Companies 2018 Annual Report

Assets
 
2018

 
2017

 
 
(in millions)
Current Assets:
 
 
 
 
Cash and cash equivalents
 
$
64

 
$
73

Receivables —
 
 
 
 
Energy marketing receivable
 
801

 
607

Customer accounts receivable
 
370

 
400

Unbilled revenues
 
213

 
285

Affiliated
 
11

 
12

Other accounts and notes receivable
 
142

 
91

Accumulated provision for uncollectible accounts
 
(30
)
 
(28
)
Natural gas for sale
 
524

 
595

Prepaid expenses
 
118

 
79

Assets from risk management activities, net of collateral
 
219

 
135

Other regulatory assets, current
 
73

 
94

Other current assets
 
50

 
52

Total current assets
 
2,555

 
2,395

Property, Plant, and Equipment:
 
 
 
 
In service
 
15,177

 
15,833

Less: Accumulated depreciation
 
4,400

 
4,596

Plant in service, net of depreciation
 
10,777

 
11,237

Construction work in progress
 
580

 
491

Total property, plant, and equipment
 
11,357

 
11,728

Other Property and Investments:
 
 
 
 
Goodwill
 
5,015

 
5,967

Equity investments in unconsolidated subsidiaries
 
1,538

 
1,477

Other intangible assets, net of amortization of $145 and $120
at December 31, 2018 and December 31, 2017, respectively
 
101

 
280

Miscellaneous property and investments
 
20

 
21

Total other property and investments
 
6,674

 
7,745

Deferred Charges and Other Assets:
 
 
 
 
Other regulatory assets, deferred
 
669

 
901

Other deferred charges and assets
 
193

 
218

Total deferred charges and other assets
 
862

 
1,119

Total Assets
 
$
21,448

 
$
22,987

The accompanying notes are an integral part of these consolidated financial statements.

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CONSOLIDATED BALANCE SHEETS
At December 31, 2018 and 2017
Southern Company Gas and Subsidiary Companies 2018 Annual Report

Liabilities and Stockholder's Equity
 
2018

 
2017

 
 
(in millions)
Current Liabilities:
 
 
 
 
Securities due within one year
 
$
357

 
$
157

Notes payable
 
650

 
1,518

Energy marketing trade payables
 
856

 
546

Accounts payable —
 
 
 
 
Affiliated
 
45

 
21

Other
 
402

 
425

Customer deposits
 
133

 
128

Accrued taxes —
 
 
 
 
Accrued income taxes
 
66

 
40

Other accrued taxes
 
75

 
78

Accrued interest
 
55

 
51

Accrued compensation
 
100

 
74

Liabilities from risk management activities, net of collateral
 
76

 
69

Other regulatory liabilities, current
 
79

 
135

Other current liabilities
 
130

 
159

Total current liabilities
 
3,024

 
3,401

Long-term Debt  (See accompanying statements)
 
5,583

 
5,891

Deferred Credits and Other Liabilities:
 
 
 
 
Accumulated deferred income taxes
 
1,016

 
1,089

Deferred credits related to income taxes
 
940

 
1,063

Employee benefit obligations
 
357

 
415

Other cost of removal obligations
 
1,585

 
1,646

Accrued environmental remediation
 
268

 
342

Other deferred credits and liabilities
 
105

 
118

Total deferred credits and other liabilities
 
4,271

 
4,673

Total Liabilities
 
12,878

 
13,965

Common Stockholder's Equity  (See accompanying statements)
 
8,570

 
9,022

Total Liabilities and Stockholder's Equity
 
$
21,448

 
$
22,987

Commitments and Contingent Matters  (See notes)
 

 

The accompanying notes are an integral part of these consolidated financial statements.


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CONSOLIDATED STATEMENTS OF CAPITALIZATION
At December 31, 2018 and 2017
Southern Company Gas and Subsidiary Companies 2018 Annual Report

 
2018

 
2017

 
2018

 
2017

 
(in millions)
 
(percent of total)
Long-Term Debt:
 
 
 
 
 
 
 
Long-term notes payable —
 
 
 
 
 
 
 
3.50% due 2018
$

 
$
155

 
 
 
 
5.25% due 2019
300

 
300

 
 
 
 
3.50% to 9.10% due 2021
330

 
330

 
 
 
 
8.55% to 8.70% due 2022
46

 
46

 
 
 
 
2.45% due 2023
350

 
350

 
 
 
 
3.25% to 7.30% due 2025-2047
3,134

 
3,134

 
 
 
 
Total long-term notes payable
4,160

 
4,315

 
 
 
 
Other long-term debt —
 
 
 
 
 
 
 
First mortgage bonds —
 
 
 
 
 
 
 
4.70% due 2019
50

 
50

 
 
 
 
5.80% due 2023
50

 
50

 
 
 
 
2.66% to 6.58% due 2026-2058
1,225

 
925

 
 
 
 
Gas facility revenue bonds —
 
 
 
 
 
 
 
Variable rate (1.71% at 12/31/17) due 2022

 
47

 
 
 
 
Variable rate (1.71% at 12/31/17) due 2024-2033

 
153

 
 
 
 
Total other long-term debt
1,325

 
1,225

 
 
 
 
Unamortized fair value adjustment of long-term debt
474

 
525

 
 
 
 
Unamortized debt discount
(19
)
 
(17
)
 
 
 
 
Total long-term debt (annual interest requirement — $244 million)
5,940

 
6,048

 
 
 
 
Less amount due within one year
357

 
157

 
 
 
 
Long-term debt excluding amount due within one year
5,583

 
5,891

 
39.4
%
 
39.5
%
Common Stockholder's Equity:
 
 
 
 
 
 
 
Common stock — par value $0.01 per share
 
 
 
 
 
 
 
Authorized — 100 million shares
 
 
 
 
 
 
 
Outstanding — 100 shares
 
 
 
 
 
 
 
Paid-in capital
8,856

 
9,214

 
 
 
 
Accumulated deficit
(312
)
 
(212
)
 
 
 
 
Accumulated other comprehensive income
26

 
20

 
 
 
 
Total common stockholder's equity
8,570

 
9,022

 
60.6

 
60.5

Total Capitalization
$
14,153

 
$
14,913

 
100.0
%
 
100.0
%
The accompanying notes are an integral part of these financial statements.

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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
Southern Company Gas and Subsidiary Companies 2018 Annual Report
 
 
Southern Company Gas Common Stockholders' Equity
 
 
 
 
Number of Common Shares
 
Common Stock
 
 
 
Accumulated
Other
Comprehensive Income
(Loss)
 
Noncontrolling
Interests
 
 
Issued
 
Treasury
 
Par Value
 
Paid-In Capital
 
Treasury
 
Retained Earnings (Accumulated Deficit)
 
 
Total
 
(in thousands)
 
(in millions)
Predecessor –
Balance at December 31, 2015
120,377

 
217

 
$
603

 
$
2,099

 
$
(8
)
 
$
1,421

 
$
(186
)
 
$
46

$
3,975

Consolidated net income
   attributable to
   Southern Company Gas

 

 

 

 

 
131

 

 

131

Other comprehensive income
   (loss)

 

 

 

 

 

 
(35
)
 

(35
)
Stock issued
95

 

 

 
6

 

 

 

 

6

Stock-based compensation
270

 

 
2

 
28

 

 

 

 

30

Cash dividends on common stock

 

 

 

 

 
(128
)
 

 

(128
)
Reclassification of
   noncontrolling interest

 

 

 

 

 

 

 
(46
)
(46
)
Predecessor –
Balance at June 30, 2016
120,742

 
217

 
605

 
2,133

 
(8
)
 
1,424

 
(221
)
 

3,933

Successor –
Balance at July 1, 2016

 

 

 
8,001

 

 

 

 

8,001

Consolidated net income
   attributable to
   Southern Company Gas

 

 

 

 

 
114

 

 

114

Capital contributions from parent
company

 

 

 
1,094

 

 

 

 

1,094

Other comprehensive income
   (loss)

 

 

 

 

 

 
26

 

26

Cash dividends on common stock

 

 

 

 

 
(126
)
 

 

(126
)
Successor –
Balance at December 31, 2016

 

 

 
9,095

 

 
(12
)
 
26

 

9,109

Consolidated net income
   attributable to
   Southern Company Gas

 

 

 

 

 
243

 

 

243

Capital contributions from
   parent company, net

 

 

 
117

 

 

 

 

117

Other comprehensive income
   (loss)

 

 

 

 

 

 
(5
)
 

(5
)
Cash dividends on common stock

 

 

 

 

 
(443
)
 

 

(443
)
Other

 

 

 
2

 

 

 
(1
)
 

1

Successor –
Balance at December 31, 2017

 

 

 
9,214

 

 
(212
)
 
20

 

9,022

Consolidated net income
   attributable to
   Southern Company Gas

 

 

 

 

 
372

 

 

372

Return of capital to parent

 

 

 
(400
)
 

 

 

 

(400
)
Capital contributions from
parent company

 

 

 
42

 

 

 

 

42

Other comprehensive income
(loss)

 

 

 

 

 

 
2

 

2

Cash dividends on common stock

 

 

 

 

 
(468
)
 

 

(468
)
Other

 

 

 

 

 
(4
)
 
4

 


Successor –
Balance at December 31, 2018

 

 
$

 
$
8,856

 
$

 
$
(312
)
 
$
26

 
$

$
8,570

The accompanying notes are an integral part of these consolidated financial statements. 

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COMBINED NOTES TO FINANCIAL STATEMENTS
Southern Company and Subsidiary Companies 2018 Annual Report

Notes to the Financial Statements
for
The Southern Company and Subsidiary Companies
Alabama Power Company
Georgia Power Company
Mississippi Power Company
Southern Power Company and Subsidiary Companies
Southern Company Gas and Subsidiary Companies



Index to the Combined Notes to Financial Statements

Index to Applicable Notes to Financial Statements by Registrant
The following notes to the financial statements are a combined presentation. The list below indicates the registrants to which each note applies.
Registrant
Applicable Notes
Southern Company
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17
Alabama Power
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 17
Georgia Power
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 17
Mississippi Power
1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 17
Southern Power
1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17
Southern Company Gas
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17


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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

1 . SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
General
Southern Company is the parent company of the traditional electric operating companies, Southern Power, Southern Company Gas (as of July 1, 2016), SCS, Southern Linc, Southern Holdings, Southern Nuclear, PowerSecure (as of May 9, 2016), and other direct and indirect subsidiaries. The traditional electric operating companies – Alabama Power, Georgia Power, Gulf Power (through December 31, 2018), and Mississippi Power – are vertically integrated utilities providing electric service in four Southeastern states. On January 1, 2019, Southern Company completed the sale of Gulf Power to NextEra Energy. Southern Power develops, constructs, acquires, owns, and manages power generation assets, including renewable energy projects, and sells electricity at market-based rates in the wholesale market. On May 22, 2018, Southern Power sold a noncontrolling 33% equity interest in SP Solar, a limited partnership indirectly owning substantially all of Southern Power's solar facilities, and, on December 11, 2018, Southern Power sold a noncontrolling tax equity interest in SP Wind, a holding company owning a portfolio of eight operating wind facilities. On November 5, 2018, Southern Power entered into an agreement to sell all of its equity interests in Plant Mankato (including the 385 -MW expansion currently under construction). On December 4, 2018, Southern Power sold all of its equity interests in Plant Oleander and Plant Stanton Unit A (together, the Florida Plants) to NextEra Energy. Southern Company Gas distributes natural gas through natural gas distribution utilities and is involved in several other complementary businesses including gas pipeline investments, wholesale gas services, and gas marketing services. In July 2018, Southern Company Gas completed sales of three of its natural gas distribution utilities (Elizabethtown Gas (New Jersey), Florida City Gas, and Elkton Gas (Maryland)). The remaining natural gas distribution utilities include Nicor Gas (Illinois), Atlanta Gas Light (Georgia), Virginia Natural Gas, and Chattanooga Gas (Tennessee). In June 2018, Southern Company Gas also completed the sale of Pivotal Home Solutions, which provided home equipment protection products and services. SCS, the system service company, provides, at cost, specialized services to Southern Company and its subsidiary companies. Southern Linc provides digital wireless communications for use by Southern Company and its subsidiary companies and also markets these services to the public and provides fiber optics services within the Southeast. Southern Holdings is an intermediate holding company subsidiary, primarily for Southern Company's investments in leveraged leases and for other electric services. Southern Nuclear operates and provides services to the Southern Company system's nuclear power plants, including Alabama Power's Plant Farley and Georgia Power's Plant Hatch and Plant Vogtle Units 1 and 2, and is currently managing construction of and developing Plant Vogtle Units 3 and 4, which are co-owned by Georgia Power. PowerSecure is a provider of energy solutions, including distributed energy infrastructure, energy efficiency products and services, and utility infrastructure services, to customers. See Note 15 for additional information regarding disposition activities.
The registrants' financial statements reflect investments in subsidiaries on a consolidated basis. Intercompany transactions have been eliminated in consolidation. The equity method is used for investments in entities in which a registrant has significant influence but does not control and for VIEs where a registrant has an equity investment but is not the primary beneficiary. Southern Power has consolidated renewable generation projects that are partially funded by tax equity investors. The related contractual provisions represent profit-sharing arrangements because the allocations of cash distributions and tax benefits are not based on fixed ownership percentages. Therefore, the noncontrolling interest is accounted for under a balance sheet approach utilizing the HLBV method. The HLBV method calculates each partner's share of income based on the change in net equity the partner can legally claim in a HLBV at the end of the period compared to the beginning of the period. See Note 7 for additional information.
The traditional electric operating companies, Southern Power, certain subsidiaries of Southern Company Gas, and certain other subsidiaries are subject to regulation by the FERC, and the traditional electric operating companies and natural gas distribution utilities are also subject to regulation by their respective state PSCs or other applicable state regulatory agencies. As such, the respective financial statements of the registrants reflect the effects of rate regulation in accordance with GAAP and comply with the accounting policies and practices prescribed by relevant state PSCs or other applicable state regulatory agencies.
The preparation of financial statements in conformity with GAAP requires the use of estimates, and the actual results may differ from those estimates. Certain prior years' data presented in the financial statements have been reclassified to conform to the current year presentation. These reclassifications had no impact on the registrants' results of operations, financial position, or cash flows. In addition, Southern Company Gas has recast its reportable segments. See Note 16 under " Southern Company Gas " for additional information.
At December 31, 2018, Southern Company and Southern Power each had assets and liabilities held for sale on their balance sheets. Unless otherwise noted, the disclosures herein related to specific asset and liability balances at December 31, 2018 exclude assets and liabilities held for sale. See Note 15 under " Assets Held for Sale " for additional information including Southern Company's and Southern Power's major classes of assets and liabilities classified as held for sale.

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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

Southern Company Gas
Pursuant to the Merger, Southern Company pushed down the application of the acquisition method of accounting to the financial statements of Southern Company Gas such that the assets and liabilities are recorded at their respective fair values, and goodwill was established for the excess of the purchase price over the fair value of net identifiable assets. Accordingly, the financial statements of Southern Company Gas for periods before and after July 1, 2016 (acquisition date) reflect different bases of accounting, and the financial positions and results of operations of those periods are not comparable. Throughout Southern Company Gas' financial statements and the combined notes to the financial statements, periods prior to July 1, 2016 are identified as "predecessor," while periods after the acquisition date are identified as "successor."
Certain predecessor period data presented in Southern Company Gas' financial statements has been modified or reclassified to conform to the presentation used by Southern Company. Changes to Southern Company Gas' statements of income include classifying operating revenues as natural gas revenues and other revenues, as well as classifying cost of goods sold as cost of natural gas and cost of other sales and presenting interest expense and AFUDC on a gross basis. Changes to Southern Company Gas' statements of cash flows include revised financial statement line item descriptions to align with the new balance sheet descriptions and expanded line items within each category of cash flow activity.
Recently Adopted Accounting Standards
Revenue
In 2014, the FASB issued ASC 606, Revenue from Contracts with Customers (ASC 606), replacing the existing accounting standard and industry-specific guidance for revenue recognition with a five-step model for recognizing and measuring revenue from contracts with customers. The underlying principle of the standard is to recognize revenue to depict the transfer of goods or services to customers at the amount expected to be collected. ASC 606 became effective on January 1, 2018 and the registrants adopted it using the modified retrospective method applied to open contracts and only to the version of contracts in effect as of January 1, 2018. In accordance with the modified retrospective method, the registrants' previously issued financial statements have not been restated to comply with ASC 606 and the registrants did not have a cumulative-effect adjustment to retained earnings. The adoption of ASC 606 had no significant impact on the timing of revenue recognition compared to previously reported results; however, it requires enhanced disclosures regarding the nature, amount, timing, and uncertainty of revenue and the related cash flows arising from contracts with customers, which are included herein and in Note 4 .
ASC 606 provided additional clarity on financial statement presentation that resulted in reclassifications into other revenues and other operations and maintenance from other income/(expense), net at Alabama Power and Georgia Power primarily related to certain unregulated sales of products and services. In addition, contract assets related to certain fixed retail revenues at Georgia Power and Southern Company's unregulated distributed generation business have been reclassified from unbilled revenue in accordance with the guidance in ASC 606. These reclassifications did not affect the timing or amount of revenues recognized or cash flows. ASC 606 also provided additional guidance on revenue recognized over time, resulting in a change in the timing of revenue recognized from guaranteed and fixed billing arrangements at Southern Company Gas.

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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

The specific impacts of applying ASC 606 to revenues from contracts with customers on the financial statements of Southern Company, Alabama Power, Georgia Power, and Southern Company Gas compared to previously recognized guidance is shown below.
 
For the Year Ended December 31, 2018
Statements of Income
As Reported
Balances Without Adoption of
ASC 606
Effect of Change
 
(in millions)
Southern Company
 
 
 
Natural gas revenues
$
3,854

$
3,852

$
2

Other revenues
1,239

1,234

5

Other operations and maintenance
5,889

5,830

59

Operating Income
4,191

4,243

(52
)
Other income (expense), net
114

60

54

Earnings Before Income Taxes
2,749

2,747

2

Income taxes
449

448

1

Consolidated Net Income
2,300

2,299

1

Consolidated Net Income Attributable to Southern Company
2,226

2,225

1

 
 
 
 
Alabama Power
 
 
 
Other revenues
$
267

$
230

$
37

Other operations and maintenance
1,669

1,625

44

Taxes other than income taxes
389

388

1

Operating Income
1,477

1,485

(8
)
Other income (expense), net
20

12

8

 
 
 
 
Georgia Power
 
 
 
Other revenues
$
481

$
387

$
94

Other operations and maintenance
1,860

1,772

88

Operating Income
1,289

1,283

6

Other income (expense), net
115

121

(6
)
 
 
 
 
Southern Company Gas
 
 
 
Natural gas revenues
$
3,874

$
3,872

$
2

Operating Income
915

913

2

Earnings Before Income Taxes
836

834

2

Income taxes
464

463

1

Net Income
372

371

1


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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

 
For the Year Ended December 31, 2018
Statements of Cash Flows
As Reported
Balances Without Adoption of
ASC 606
Effect of Change
 
(in millions)
Southern Company
 
 
 
Consolidated net income
$
2,300

$
2,299

$
1

Changes in certain current assets and liabilities:
 
 
 
Receivables
(426
)
(472
)
46

Other current assets
(127
)
(81
)
(46
)
Accrued taxes
267

268

(1
)
Other current liabilities
63

61

2

 
 
 
 
Georgia Power
 
 
 
Changes in certain current assets and liabilities:
 
 
 
Receivables
$
8

$
1

$
7

Other current assets
(43
)
(36
)
(7
)
 
 
 
 
Southern Company Gas
 
 
 
Net income
$
372

$
371

$
1

Changes in certain current assets and liabilities:
 
 
 
Accrued taxes
10

11

(1
)
Other current liabilities
(22
)
(24
)
2

 
At December 31, 2018
Balance Sheets
As Reported
Balances Without Adoption of
ASC 606
Effect of Change
 
(in millions)
Southern Company
 
 
 
Unbilled revenues
$
654

$
728

$
(74
)
Other accounts and notes receivable
813

814

(1
)
Other current assets
162

87

75

Accrued taxes
656

655

1

Other current liabilities
852

854

(2
)
Total Stockholders' Equity
29,039

29,038

1

 
 
 
 
Georgia Power
 
 
 
Unbilled revenues
$
208

$
243

$
(35
)
Other accounts and notes receivable
80

81

(1
)
Other current assets
70

34

36

 
 
 
 
Southern Company Gas
 
 
 
Accrued income taxes
$
66

$
65

$
1

Other current liabilities
130

132

(2
)
Common Stockholder's Equity
8,570

8,569

1


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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

Other
In 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash (ASU 2016-18). ASU 2016-18 eliminates the need to reflect transfers between cash and restricted cash in operating, investing, and financing activities in the statements of cash flows. In addition, the net change in cash and cash equivalents during the period includes amounts generally described as restricted cash or restricted cash equivalents. The registrants adopted ASU 2016-18 retrospectively effective January 1, 2018. Southern Company, Southern Power, and Southern Company Gas have restated prior periods in the statements of cash flows by immaterial amounts. The change in restricted cash in the statements of cash flows was previously disclosed in operating activities for Southern Company and Southern Company Gas and in investing activities for Southern Company and Southern Power. See " Restricted Cash " herein for additional information.
In January 2017, the FASB issued ASU No. 2017-04, Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment (ASU 2017-04). ASU 2017-04 removes the requirement to compare the implied fair value of goodwill with the carrying amount as part of Step 2 of the goodwill impairment test. Under the new standard, the goodwill impairment loss will be measured as the excess of a reporting unit's carrying amount over its fair value, not exceeding the total amount of goodwill allocated to that reporting unit, which may increase the frequency of goodwill impairment charges if a future goodwill impairment test does not pass the Step 1 evaluation. ASU 2017-04 is effective prospectively for periods beginning on or after December 15, 2019, with early adoption permitted. The registrants adopted ASU 2017-04 effective January 1, 2018 with no impact on their respective financial statements.
In March 2017, the FASB issued ASU No. 2017-07, Compensation – Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost (ASU 2017-07). ASU 2017-07 requires that an employer report the service cost component in the same line item or items as other compensation costs and requires the other components of net periodic pension and postretirement benefit costs to be separately presented in the statements of income outside of income from operations. Additionally, only the service cost component is eligible for capitalization, when applicable. The registrants adopted ASU 2017-07 effective January 1, 2018 with no material impact on their respective financial statements. ASU 2017-07 has been applied retrospectively, with the service cost component of net periodic benefit costs included in operations and maintenance expenses and all other components of net periodic benefit costs included in other income (expense), net in the statements of income for all periods presented for Southern Company, the traditional electric operating companies, and Southern Company Gas. The impacted registrants used the practical expedient provided by ASU 2017-07, which permits an employer to use the amounts disclosed in its retirement benefits note for prior comparative periods as the estimation basis for applying the retrospective presentation requirements to those periods. The amounts of the other components of net periodic benefit costs reclassified for the prior periods are presented in Note 11 . The presentation changes resulted in a decrease in operating income and an increase in other income for the years ended December 31, 2017 and 2016 for each of the impacted registrants. Since Southern Power did not participate in the qualified pension and postretirement benefit plans until December 2017, no retrospective presentation of Southern Power's net periodic benefit costs is required. The requirement to limit capitalization to the service cost component of net periodic benefit costs has been applied on a prospective basis from the date of adoption for all registrants.
In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities (ASU 2017-12). ASU 2017-12 makes more financial and non-financial hedging strategies eligible for hedge accounting, amends the related presentation and disclosure requirements, and simplifies hedge effectiveness assessment requirements. ASU 2017-12 is effective for fiscal years beginning after December 15, 2018, with early adoption permitted. The registrants adopted ASU 2017-12 effective January 1, 2018 with no material impact on their respective financial statements. See Note 14 for disclosures required by ASU 2017-12.
On February 14, 2018, the FASB issued ASU No. 2018-02, Income Statement – Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income (ASU 2018-02) to address the application of ASC 740, Income Taxes (ASC 740) to certain provisions of the Tax Reform Legislation. ASU 2018-02 specifically addresses the ASC 740 requirement that the effect of a change in tax laws or rates on deferred tax assets and liabilities be included in income from continuing operations, even when the tax effects were initially recognized directly in OCI at the previous rate, which strands the income tax rate differential in accumulated OCI. The amendments in ASU 2018-02 allow a reclassification from accumulated OCI to retained earnings for stranded tax effects resulting from the Tax Reform Legislation. The registrants adopted ASU 2018-02 effective January 1, 2018 with no material impact on their respective financial statements.
On August 28, 2018, the FASB issued ASU No. 2018-14, Compensation – Retirement Benefits – Defined Benefit Plans – General (Topic 715-20): Disclosure Framework – Changes to the Disclosure Requirements for Defined Benefit Plans (ASU 2018-14). ASU 2018-14 amends ASC 715 to add, remove, and clarify disclosure requirements related to defined benefit pension and other

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postretirement plans. The registrants adopted ASU 2018-14 effective December 31, 2018 with no material impact on their respective financial statements. See Note 11 for disclosures required by ASU 2018-14.
Affiliate Transactions
The traditional electric operating companies, Southern Power, and Southern Company Gas have agreements with SCS under which certain of the following services are rendered to them at direct or allocated cost: general executive and advisory, general and design engineering, operations, purchasing, accounting, finance, treasury, legal, tax, information technology, marketing, auditing, insurance and pension administration, human resources, systems and procedures, digital wireless communications, cellular tower space, and other services with respect to business and operations, construction management, and power pool transactions. These costs are primarily included in other operations and maintenance expenses or capitalized to property, plant, and equipment. Costs for these services from SCS in 2018 , 2017 , and 2016 were as follows:
 
Alabama
Power
Georgia
Power
Mississippi
Power
Southern
Power (a)
Southern Company Gas (b)
 
(in millions)
2018
$
508

$
653

$
104

$
98

$
194

2017
479

625

140

218

63

2016
460

606

231

193

17

(a)
Prior to December 2017, Southern Power had no employees but was billed for employee-related costs from SCS.
(b)
Southern Company Gas' 2016 costs represent services provided subsequent to the Merger.
Alabama Power and Georgia Power also have agreements with Southern Nuclear under which Southern Nuclear renders the following nuclear-related services at cost: general executive and advisory services; general operations, management, and technical services; administrative services including procurement, accounting, employee relations, systems, and procedures services; strategic planning and budgeting services; other services with respect to business and operations; and, for Georgia Power, construction management. These costs are primarily included in other operations and maintenance expenses or capitalized to property, plant, and equipment. Costs for these services in 2018 , 2017 , and 2016 amounted to $247 million , $248 million , and $249 million , respectively, for Alabama Power and $780 million , $675 million , and $666 million , respectively, for Georgia Power. See Note 2 under " Georgia Power Nuclear Construction " for additional information regarding Southern Nuclear's construction management of Plant Vogtle Units 3 and 4 for Georgia Power.
Cost allocation methodologies used by SCS and Southern Nuclear prior to the repeal of the Public Utility Holding Company Act of 1935, as amended, were approved by the SEC. Subsequently, additional cost allocation methodologies have been reported to the FERC and management believes they are reasonable. The FERC permits services to be rendered at cost by system service companies.
Alabama Power's and Georgia Power's total power purchased from affiliates through the power pool is included in purchased power, affiliates on their respective statements of income. Mississippi Power's and Southern Power's total power purchased from affiliates through the power pool is included in purchased power on their respective statements of income and was as follows:
 
Mississippi
Power
Southern
Power
 
(in millions)
2018
$
15

$
41

2017
16

27

2016
29

21


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SCS, as agent for Alabama Power, Georgia Power, Southern Power, and Southern Company Gas, has long-term interstate natural gas transportation agreements with SNG. The interstate transportation service provided to Alabama Power, Georgia Power, Southern Power, and Southern Company Gas by SNG pursuant to these agreements is governed by the terms and conditions of SNG's natural gas tariff and is subject to FERC regulation. See Notes 7 and 15 under " Southern Company Gas Equity Method Investments SNG " and " Southern Company Gas Investment in SNG ," respectively, for additional information. Transportation costs under these agreements in 2018 , 2017 , and 2016 were as follows:
 
Alabama
Power
Georgia
Power
Southern
Power
Southern Company Gas
 
(in millions)
2018
$
8

$
101

$
25

$
32

2017
9

102

25

32

2016 (*)
2

35

7

15

(*)
Represents costs incurred for the period subsequent to Southern Company Gas' investment in SNG.
On November 16, 2018, SNG completed its purchase of Georgia Power's natural gas lateral pipeline serving Plant McDonough Units 4 through 6 at net book value, as approved by the Georgia PSC on January 16, 2018. SNG expects to pay $142 million to Georgia Power in the first quarter 2020. During the interim period, Georgia Power will receive a discounted shipping rate to reflect the delayed consideration. Southern Company Gas' portion of the expected capital expenditures for the purchase of this pipeline and additional construction is $122 million .
SCS, as agent for the traditional electric operating companies and Southern Power, has agreements with certain subsidiaries of Southern Company Gas to purchase natural gas. Natural gas purchases made under these agreements were immaterial for Alabama Power and Mississippi Power and as follows for Georgia Power and Southern Power in 2018 , 2017 , and 2016 :
 
Georgia
Power
Southern
Power
 
(in millions)
2018
$
21

$
119

2017
22

119

2016 (*)
10

17

(*)
Represents costs incurred for the period subsequent to Southern Company's acquisition of Southern Company Gas.
Alabama Power and Mississippi Power jointly own Plant Greene County. The companies have an agreement under which Alabama Power operates Plant Greene County and Mississippi Power reimburses Alabama Power for its proportionate share of non-fuel expenses, which totaled $8 million , $9 million , and $13 million in 2018 , 2017 , and 2016 , respectively. Mississippi Power also reimburses Alabama Power for any direct fuel purchases delivered from one of Alabama Power's transfer facilities. There were no such fuel purchases in 2018 , 2017 , and 2016 . See Note 5 under " Joint Ownership Agreements " for additional information.
Alabama Power has an agreement with Gulf Power under which Alabama Power made transmission system upgrades to ensure firm delivery of energy under a non-affiliate PPA from a combined cycle plant located in Autauga County, Alabama. Under a related tariff, Alabama Power received $11 million in 2018 , $11 million in 2017 , and $12 million in 2016 . See Note 15 under " Southern Company's Sale of Gulf Power " for information regarding the sale of Gulf Power.
Alabama Power has agreements with PowerSecure for services related to utility infrastructure construction, distributed energy, and energy efficiency projects. Costs for these services amounted to approximately $24 million in 2018 and $11 million in 2017 and were immaterial in 2016 .
See Note 7 under " SEGCO " for information regarding Alabama Power's and Georgia Power's equity method investment in SEGCO and related affiliate purchased power costs, as well as Alabama Power's gas pipeline ownership agreement with SEGCO.
Georgia Power has entered into several PPAs with Southern Power for capacity and energy. Total expenses associated with these PPAs were $216 million , $235 million , and $265 million in 2018 , 2017 , and 2016 , respectively. See Note 8 under " Long-term Debt Capital Leases Georgia Power " and Note 9 under " Fuel and Power Purchase Agreements Affiliate " for additional information.

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Georgia Power has a joint ownership agreement with Gulf Power under which Gulf Power owns a 25% portion of Plant Scherer Unit 3. Under this agreement, Georgia Power operates Plant Scherer Unit 3 and Gulf Power reimburses Georgia Power for its 25% proportionate share of the related non-fuel expenses, which were $8 million , $11 million , and $8 million in 2018 , 2017 , and 2016 , respectively. See Note 5 under " Joint Ownership Agreements " and Note 15 under " Southern Company's Sale of Gulf Power " for additional information.
Mississippi Power has an agreement with Gulf Power under which Gulf Power owns a portion of Plant Daniel. Mississippi Power operates Plant Daniel and Gulf Power reimburses Mississippi Power for its proportionate share of all associated expenditures and costs, which totaled $31 million , $31 million , and $26 million in 2018 , 2017 , and 2016 , respectively. See Note 5 under " Joint Ownership Agreements " and Note 15 under " Southern Company's Sale of Gulf Power " for additional information.
In 2014, prior to Southern Company's 2016 acquisition of PowerSecure, Georgia Power entered into agreements with PowerSecure to build solar power generation facilities at two U.S. Army bases, as approved by the Georgia PSC. In October 2016, the two facilities began commercial operation. Payments of $32 million made by Georgia Power to PowerSecure under the agreements since Southern Company's acquisition of PowerSecure are included in plant in service at December 31, 2018 .
Southern Power's total revenues from all PPAs with Georgia Power, included in wholesale revenue affiliates on Southern Power's consolidated statements of income, were $215 million , $233 million , and $258 million for 2018 , 2017 , and 2016 , respectively. Included within these revenues were affiliate PPAs accounted for as operating leases, which totaled $65 million , $81 million , and $109 million for 2018 , 2017 , and 2016 , respectively.
Southern Power has several agreements with SCS for transmission services. Transmission services purchased by Southern Power from SCS totaled $12 million , $13 million , and $11 million for 2018 , 2017 , and 2016 , respectively, and were charged to other operations and maintenance in Southern Power's consolidated statements of income. All charges were billed to Southern Power based on the Southern Company Open Access Transmission Tariff as filed with the FERC.
The traditional electric operating companies and Southern Power may jointly enter into various types of wholesale energy, natural gas, and certain other contracts, either directly or through SCS as agent. Each participating company may be jointly and severally liable for the obligations incurred under these agreements. See Note 9 under " Fuel and Power Purchase Agreements " for additional information. Southern Power and the traditional electric operating companies generally settle amounts related to the above transactions on a monthly basis in the month following the performance of such services or the purchase or sale of electricity. See " Revenues Southern Power " herein for additional information.
The traditional electric operating companies, Southern Power, and Southern Company Gas provide incidental services to and receive such services from other Southern Company subsidiaries which are generally minor in duration and amount. Except as described herein, the traditional electric operating companies, Southern Power, and Southern Company Gas neither provided nor received any material services to or from affiliates in 2018 , 2017 , or 2016 .
Regulatory Assets and Liabilities
The traditional electric operating companies and natural gas distribution utilities are subject to accounting requirements for the effects of rate regulation. Regulatory assets represent probable future revenues associated with certain costs that are expected to be recovered from customers through the ratemaking process. Regulatory liabilities represent probable future reductions in revenues associated with amounts that are expected to be credited to customers through the ratemaking process.
In the event that a portion of a traditional electric operating company's or a natural gas distribution utility's operations is no longer subject to applicable accounting rules for rate regulation, such company would be required to write off to income or reclassify to AOCI related regulatory assets and liabilities that are not specifically recoverable through regulated rates. In addition, the traditional electric operating company or natural gas distribution utility would be required to determine if any impairment to other assets, including plant, exists and write down the assets, if impaired, to their fair values. All regulatory assets and liabilities are to be reflected in rates. See Note 2 for additional information including details of regulatory assets and liabilities reflected in the balance sheets for Southern Company, the traditional electric operating companies, and Southern Company Gas.

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Revenues
The registrants generate revenues from a variety of sources which are accounted for under various revenue accounting guidance, including ASC 606, lease, derivative, and regulatory accounting. Other than the timing of recognition of guaranteed and fixed billing arrangements at Southern Company Gas, the adoption of ASC 606 had no impact on the timing or amount of revenue recognized under previous guidance. See " Recently Adopted Accounting Standards Revenue " herein and Note 4 for information regarding the registrants' adoption of ASC 606 and related disclosures.
Traditional Electric Operating Companies
The majority of the revenues of the traditional electric operating companies are generated from contracts with retail electric customers. Retail revenues recognized under ASC 606 are consistent with prior revenue recognition policies. These revenues, generated from the integrated service to deliver electricity when and if called upon by the customer, are recognized as a single performance obligation satisfied over time, at a tariff rate, and as electricity is delivered to the customer during the month. Unbilled revenues related to retail sales are accrued at the end of each fiscal period. Retail rates may include provisions to adjust billings for fluctuations in fuel costs, fuel hedging, the energy component of purchased power costs, and certain other costs. Revenues are adjusted for differences between these actual costs and amounts billed in current regulated rates. Under or over recovered regulatory clause revenues are recorded in the balance sheets and are recovered from or returned to customers, respectively, through adjustments to the billing factors. See Note 2 for additional information regarding regulatory matters of the traditional electric operating companies.
Wholesale capacity revenues from PPAs are recognized either on a levelized basis over the appropriate contract period or the amount billable under the contract terms. Energy and other revenues are generally recognized as services are provided. The accounting for these revenues under ASC 606 is consistent with prior revenue recognition policies. The contracts for capacity and energy in a wholesale PPA have multiple performance obligations where the contract's total transaction price is allocated to each performance obligation based on the standalone selling price. The standalone selling price is primarily determined by the price charged to customers for the specific goods or services transferred with the performance obligations. Generally, the traditional electric operating companies recognize revenue as the performance obligations are satisfied over time as electricity is delivered to the customer or as generation capacity is available to the customer.
For both retail and wholesale revenues, the traditional electric operating companies generally have a right to consideration in an amount that corresponds directly with the value to the customer of the entity's performance completed to date and may recognize revenue in the amount to which the entity has a right to invoice and has elected to recognize revenue for its sales of electricity and capacity using the invoice practical expedient. In addition, payment for goods and services rendered is typically due in the subsequent month following satisfaction of the registrants' performance obligation.
Southern Power
Southern Power sells capacity and energy at rates specified under contractual terms in long-term PPAs. These PPAs are accounted for as operating leases, non-derivatives, or normal sale derivatives. Capacity revenues from PPAs classified as operating leases are recognized on a straight-line basis over the term of the agreement. Energy revenues are recognized in the period the energy is delivered.
Southern Power's non-lease contracts commonly include capacity and energy which are considered separate performance obligations. In these contracts, the total transaction price is allocated to each performance obligation based on the standalone selling price. The standalone selling price is primarily determined by the price charged to customers for the specific goods or services transferred with the performance obligations. Generally, Southern Power recognizes revenue as the performance obligations are satisfied over time, as electricity is delivered to the customer or as generation capacity is made available to the customer. The timing of revenue recognition was not affected by the adoption of ASC 606.
Southern Power generally has a right to consideration in an amount that corresponds directly with the value to the customer of the entity's performance completed to date and may recognize revenue in the amount to which the entity has a right to invoice. In addition, payment for goods and services rendered is typically due in the subsequent month following satisfaction of Southern Power's performance obligation.
When multiple contracts exist with the same counterparty, the revenues from each contract are accounted for as separate arrangements.
Southern Power may also enter into contracts to sell short-term capacity in the wholesale electricity markets. These sales are generally classified as mark-to-market derivatives and net unrealized gains and losses on such contracts are recorded in wholesale revenues. See Note 14 and " Financial Instruments " herein for additional information.

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Southern Company Gas
Gas Distribution Operations
Southern Company Gas records revenues when goods or services are provided to customers. Those revenues are based on rates approved by the state regulatory agencies of the natural gas distribution utilities. The natural gas market for Atlanta Gas Light was deregulated in 1997. Accordingly, Marketers, rather than a traditional utility, sell natural gas to end-use customers in Georgia and handle customer billing functions. As required by the Georgia PSC, Atlanta Gas Light bills Marketers in equal monthly installments for each residential, commercial, and industrial end-use customer's distribution costs as well as for capacity costs utilizing a seasonal rate design for the calculation of each residential end-use customer's annual straight-fixed-variable charge, which reflects the historic volumetric usage pattern for the entire residential class.
The majority of the revenues of Southern Company Gas are generated from contracts with natural gas distribution customers. Revenues from this integrated service to deliver gas when and if called upon by the customer is recognized as a single performance obligation satisfied over time and is recognized at a tariff rate as gas is delivered to the customer during the month.
The standalone selling price is primarily determined by the price charged to customers for the specific goods or services transferred with the performance obligations. Generally, Southern Company Gas recognizes revenue as the performance obligations are satisfied over time as natural gas is delivered to the customer. The performance obligations related to wholesale gas services are satisfied, and revenue is recognized, at a point in time when natural gas is delivered to the customer.
Southern Company Gas generally has a right to consideration in an amount that corresponds directly with the value to the customer of the entity's performance completed to date and may recognize revenue in the amount to which the entity has a right to invoice and has elected to recognize revenue for its sales of natural gas using the invoice practical expedient. In addition, payment for goods and services rendered is typically due in the subsequent month following satisfaction of Southern Company Gas' performance obligation.
With the exception of Atlanta Gas Light, the natural gas distribution utilities have rate structures that include volumetric rate designs that allow the opportunity to recover certain costs based on gas usage. Revenues from sales and transportation services are recognized in the same period in which the related volumes are delivered to customers. Revenues from residential and certain commercial and industrial customers are recognized on the basis of scheduled meter readings. Additionally, unbilled revenues are recognized for estimated deliveries of gas not yet billed to these customers, from the last bill date to the end of the accounting period. For other commercial and industrial customers and for all wholesale customers, revenues are based on actual deliveries through the end of the period.
The tariffs for several of the natural gas distribution utilities include provisions which allow for the recognition of certain revenues prior to the time such revenues are billed to customers. These provisions are referred to as alternative revenue programs and provide for the recognition of certain revenues prior to billing, as long as the amounts recognized will be collected from customers within 24 months of recognition. These programs are as follows:
Weather normalization adjustments – reduce customer bills when winter weather is colder than normal and increase customer bills when weather is warmer than normal and are included in the tariffs for Virginia Natural Gas, Chattanooga Gas, and, prior to its sale, Elizabethtown Gas;
Revenue normalization mechanisms – mitigate the impact of conservation and declining customer usage and are contained in the tariffs for Virginia Natural Gas, Chattanooga Gas, and, prior to its sale, Elkton Gas; and
Revenue true-up adjustment – included within the provisions of the Georgia Rate Adjustment Mechanism (GRAM) program in which Atlanta Gas Light participates as a short-term alternative to formal rate case filings, the revenue true-up feature provides for a monthly positive (or negative) adjustment to record revenue in the amount of any variance to budgeted revenues, which are submitted and approved annually as a requirement of GRAM. Such adjustments are reflected in customer billings in a subsequent program year.
Wholesale Gas Services
Southern Company Gas nets revenues from energy and risk management activities with the associated costs. Profits from sales between segments are eliminated and are recognized as goods or services sold to end-use customers. Southern Company Gas records transactions that qualify as derivatives at fair value with changes in fair value recognized in earnings in the period of change and characterized as unrealized gains or losses. Gains and losses on derivatives held for energy trading purposes are presented on a net basis in revenue.

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Gas Marketing Services
Southern Company Gas recognizes revenues from natural gas sales and transportation services in the same period in which the related volumes are delivered to customers and recognizes sales revenues from residential and certain commercial and industrial customers on the basis of scheduled meter readings. Southern Company Gas also recognizes unbilled revenues for estimated deliveries of gas not yet billed to these customers from the most recent meter reading date to the end of the accounting period. For other commercial and industrial customers and for all wholesale customers, revenues are based on actual deliveries during the period.
Southern Company Gas recognizes revenues on 12 -month utility-bill management contracts as the lesser of cumulative earned or cumulative billed amounts. Prior to the sale of Pivotal Home Solutions, revenues for warranty and repair contracts were recognized on a straight-line basis over the contract term while revenues for maintenance services were recognized at the time such services were performed. See Note 15 under " Southern Company Gas Sale of Pivotal Home Solutions " for additional information.
Concentration of Revenue
Southern Company, Alabama Power, Georgia Power, Mississippi Power (with the exception of its cost-based MRA electric tariffs described below), and Southern Company Gas each have a diversified base of customers and no single customer or industry comprises 10% or more of each company's revenues.
Mississippi Power serves long-term contracts with rural electric cooperative associations and municipalities located in southeastern Mississippi under cost-based MRA electric tariffs, which are subject to regulation by the FERC. The contracts with these wholesale customers represent ed 17.3% of Mississippi Power 's total operating revenues in 2018 and are generally subject to 10 -year rolling c ancellation notices. Historically, these wholesale customers have acted as a group and any changes in contractual relationships for one customer are likely to be followed by the other wholesale customers.
Significant portions of Southern Power's revenues have been derived from certain customers pursuant to PPAs. The following table shows the percentage of total revenues for Southern Power's top three customers for each of the years presented:
 
2018
2017
2016
Georgia Power
9.8
%
11.3
%
16.5
%
Duke Energy Corporation
6.8
%
6.7
%
7.8
%
Southern California Edison
6.2
%
N/A

N/A

Morgan Stanley Capital Group
N/A

4.5
%
N/A

San Diego Gas & Electric Company
N/A

N/A

5.7
%
On January 29, 2019, Pacific Gas & Electric Company (PG&E) filed petitions to reorganize under Chapter 11 of the U.S. Bankruptcy Code. Southern Power, together with its noncontrolling partners, owns four solar facilities where PG&E is the energy off-taker for approximately 207 MWs of capacity under long-term PPAs. PG&E is also the transmission provider for these facilities and two of Southern Power's other solar facilities. Southern Power has evaluated the recoverability of its investments in these solar facilities under various scenarios, including selling the related energy into the competitive markets, and has concluded they are not impaired. At December 31, 2018, Southern Power had outstanding accounts receivables due from PG&E of $1 million related to the PPAs and $36 million related to the transmission interconnections (of which $17 million is classified in other deferred charges and assets). Southern Power does not expect a material impact to its financial statements if, as a result of the bankruptcy proceedings, PG&E does not perform in accordance with the PPAs or the terms of the PPAs are renegotiated; however, the ultimate outcome of this matter cannot be determined at this time.
Fuel Costs
Fuel costs for the traditional electric operating companies and Southern Power are expensed as the fuel is used. Fuel expense generally includes fuel transportation costs and the cost of purchased emissions allowances as they are used. For Alabama Power and Georgia Power, fuel expense also includes the amortization of the cost of nuclear fuel. For the traditional electric operating companies, fuel costs also include gains and/or losses from fuel-hedging programs as approved by their respective state PSCs.
Cost of Natural Gas
Excluding Atlanta Gas Light, which does not sell natural gas to end-use customers, Southern Company Gas charges its utility customers for natural gas consumed using natural gas cost recovery mechanisms set by the applicable state regulatory agencies.

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Under these mechanisms, all prudently-incurred natural gas costs are passed through to customers without markup, subject to regulatory review. Southern Company Gas defers or accrues the difference between the actual cost of natural gas and the amount of commodity revenue earned in a given period such that no operating income is recognized related to these costs. The deferred or accrued amount is either billed or refunded to customers prospectively through adjustments to the commodity rate. Deferred and accrued natural gas costs are included in the balance sheets as regulatory assets and regulatory liabilities, respectively.
Southern Company Gas' gas marketing services' customers are charged for actual or estimated natural gas consumed. Within cost of natural gas, Southern Company Gas also includes costs of lost and unaccounted for gas, adjustments to reduce the value of inventories to market value, and gains and losses associated with certain derivatives.
Income Taxes
The registrants use the liability method of accounting for deferred income taxes and provide deferred income taxes for all significant income tax temporary differences. In accordance with regulatory requirements, deferred federal ITCs for the traditional electric operating companies and Southern Company Gas are amortized over the average lives of the related property, with such amortization normally applied as a credit to reduce depreciation in the statements of income.
Under current tax law, certain projects at Southern Power related to the construction of renewable facilities are eligible for federal ITCs. Southern Power estimates eligible costs which, as they relate to acquisitions, may not be finalized until the allocation of the purchase price to assets has been finalized. Southern Power applies the deferred method to ITCs. Under the deferred method, the ITCs are recorded as a deferred credit and amortized to income tax expense over the life of the respective asset. Furthermore, the tax basis of the asset is reduced by 50% of the ITCs received, resulting in a net deferred tax asset. Southern Power has elected to recognize the tax benefit of this basis difference as a reduction to income tax expense in the year in which the plant reaches commercial operation. State ITCs are recognized as an income tax benefit in the period in which the credits are generated. In addition, certain projects are eligible for federal and state PTCs, which are recognized as an income tax benefit based on KWH production.
Federal ITCs and PTCs, as well as state ITCs and other state tax credits available to reduce income taxes payable, were not fully utilized in 2018 and will be carried forward and utilized in future years. In addition, Southern Company is expected to have various state net operating loss (NOL) carryforwards for certain of its subsidiaries, which would result in income tax benefits in the future, if utilized. See Note 10 under " Current and Deferred Income Taxes Tax Credit Carryforwards " and " Net Operating Loss Carryforwards " for additional information.
The registrants recognize tax positions that are "more likely than not" of being sustained upon examination by the appropriate taxing authorities. See Note 10 under " Unrecognized Tax Benefits " for additional information.
Other Taxes
Taxes imposed on and collected from customers on behalf of governmental agencies are presented net on the registrants' statements of income and are excluded from the transaction price in determining the revenue related to contracts with a customer accounted for under ASC 606.
Southern Company Gas is taxed on its gas revenues by various governmental authorities, but is allowed to recover these taxes from its customers. Revenue taxes imposed on the natural gas distribution utilities are recorded at the amount charged to customers, which may include a small administrative fee, as operating revenues, and the related taxes imposed on Southern Company Gas are recorded as operating expenses on the statements of income. Revenue taxes included in operating expenses were $111 million and $98 million for the successor years ended December 31, 2018 and 2017 , respectively, $31 million for the successor period of July 1, 2016 through December 31, 2016 , and $56 million for the predecessor period of January 1, 2016 through June 30, 2016 .
Allowance for Funds Used During Construction and Interest Capitalized
The traditional electric operating companies and certain of the natural gas distribution utilities (Atlanta Gas Light, Chattanooga Gas, and Nicor Gas) record AFUDC, which represents the estimated debt and equity costs of capital funds that are necessary to finance the construction of new regulated facilities. While cash is not realized currently, AFUDC increases the revenue requirement and is recovered over the service life of the asset through a higher rate base and higher depreciation. The equity component of AFUDC is not taxable.
Interest related to the construction of new facilities at Southern Power and new facilities not included in the traditional electric operating companies' and Southern Company Gas' regulated rates is capitalized in accordance with standard interest capitalization requirements.

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Total AFUDC and interest capitalized for the registrants in 2018 , 2017 , and 2016 was as follows:
 
Southern Company
Alabama
Power
Georgia
Power
(a)
Mississippi
Power
(b)
Southern
Power
 
(in millions)
2018
$
210

$
84

$
94

$

$
17

2017
249

54

63

72

11

2016
327

39

68

124

44

(a)
See Note 2 under " Georgia Power Nuclear Construction " for information on the inclusion of a portion of construction costs related to Plant Vogtle Units 3 and 4 in Georgia Power's rate base.
(b)
Mississippi Power's decrease in 2017 resulted from the Kemper IGCC project suspension in June 2017.
 
Successor
 
 
Predecessor
 
Year Ended December 31, 2018
Year Ended December 31, 2017
July 1, 2016
through
December 31, 2016
 
 
January 1, 2016 through
June 30, 2016
 
(in millions)
 
 
(in millions)
Southern Company Gas
$
14

$
19

$
6

 
 
$
4

The average AFUDC composite rates for 2018 , 2017 , and 2016 for the traditional electric operating companies and Southern Company Gas were as follows:
 
Alabama
Power
Georgia
Power
Mississippi
Power
2018
8.3
%
7.3
%
3.3
%
2017
8.3
%
5.6
%
6.7
%
2016
8.2
%
6.9
%
6.5
%
 
Successor
 
 
Predecessor
 
Year Ended December 31, 2018
Year Ended December 31, 2017
July 1, 2016
through
December 31, 2016
 
 
January 1, 2016 through
June 30, 2016
Southern Company Gas:
 
 
 
 
 
 
Atlanta Gas Light (a)
7.9
%
8.1
%
4.1
%
 
 
4.1
%
Chattanooga Gas (a)
7.4
%
7.4
%
3.7
%
 
 
3.7
%
Nicor Gas (b)
2.1
%
1.2
%
1.5
%
 
 
1.5
%
(a)
Fixed rates authorized by the Georgia PSC and Tennessee Public Utilities Commission for Atlanta Gas Light and Chattanooga Gas, respectively.
(b)
Variable rate determined by the FERC method of AFUDC accounting.
Impairment of Long-Lived Assets
The registrants evaluate long-lived assets and finite-lived intangible assets for impairment when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable. The determination of whether an impairment has occurred is based on either a specific regulatory disallowance, a sales transaction price that is less than the asset group's carrying value, or an estimate of undiscounted future cash flows attributable to the asset group, as compared with the carrying value of the assets. If an impairment has occurred, the amount of the impairment recognized is determined by either the amount of regulatory disallowance or by estimating the fair value of the assets and recording a loss if the carrying value is greater than the fair value. For assets identified as held for sale, the carrying value is compared to the estimated fair value less the cost to sell in order to determine if an impairment loss is required. Until the assets are disposed of, their estimated fair value is re-evaluated when circumstances or events change. See Note 15 under " Southern Power " for information regarding impairment charges recorded in 2018. Also see " Revenues " and " Leveraged Leases " herein and Note 3 under " Other Matters Southern Company Gas " for additional information.

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Goodwill and Other Intangible Assets and Liabilities
Southern Power's intangible assets consist primarily of certain PPAs acquired, which are amortized over the term of the respective PPA. Southern Company Gas' goodwill and other intangible assets and liabilities primarily relate to its 2016 acquisition by Southern Company. In addition to these items, Southern Company's goodwill and other intangible assets also relate to its 2016 acquisition of PowerSecure. See Note 15 under " Southern Company Merger with Southern Company Gas " and " Southern Company Acquisition of PowerSecure " for additional information.
Goodwill is not amortized, but is subject to an annual impairment test during the fourth quarter of each year, or more frequently if impairment indicators arise. Southern Company Gas recorded a goodwill impairment charge in the first quarter 2018 related to its disposition of Pivotal Home Solutions. Southern Company and Southern Company Gas each evaluated its goodwill in the fourth quarter 2018 and determined no additional impairment was required. The following table presents 2018 changes in goodwill balances for Southern Company and Southern Company Gas:
 
Southern Company
 
Southern Company Gas
 
 
Gas Distribution Operations
Gas Marketing Services
 
(in millions)
Balance at December 31, 2017
$
6,268

 
$
4,702

$
1,265

Impairment (a)
(42
)
 

(42
)
Dispositions (b)
(910
)
 
(668
)
(242
)
Balance at December 31, 2018
$
5,315

(c)  
$
4,034

$
981

(a)
On April 11, 2018, Southern Company Gas entered into a stock purchase agreement for the sale of Pivotal Home Solutions. In contemplation of this transaction and based on the purchase price, a goodwill impairment charge of $42 million was recorded in the first quarter 2018. See Note 15 under " Southern Company Gas " for additional information.
(b)
Gas distribution operations reflects goodwill allocated to Elizabethtown Gas, Elkton Gas, and Florida City Gas, which were sold during the third quarter 2018. Gas marketing services reflects goodwill associated with Pivotal Home Solutions, which was sold on June 4, 2018. See Note 15 under " Southern Company Gas " for additional information.
(c)
Total does not add due to rounding.

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At December 31, 2018 and 2017 , other intangible assets were as follows:
 
At December 31, 2018
 
At December 31, 2017
 
Gross Carrying Amount
Accumulated Amortization
Other
Intangible Assets, Net
 
Gross Carrying Amount
Accumulated Amortization
Other
Intangible Assets, Net
 
(in millions)
 
(in millions)
Southern Company
 
 
 
 
 
 
 
Other intangible assets subject to amortization:
 
 
 
 
 
 
 
Customer relationships (a)
$
223

$
(94
)
$
129

 
$
288

$
(83
)
$
205

Trade names (a)
70

(21
)
49

 
159

(17
)
142

Storage and transportation contracts
64

(54
)
10

 
64

(34
)
30

PPA fair value adjustments (b)
405

(61
)
344

 
456

(47
)
409

Other
11

(5
)
6

 
17

(5
)
12

Total other intangible assets subject to amortization
$
773

$
(235
)
$
538


$
984

$
(186
)
$
798

Other intangible assets not subject to amortization:
 
 
 
 
 
 
 
Federal Communications Commission licenses
75


75

 
75


75

Total other intangible assets
$
848

$
(235
)
$
613


$
1,059

$
(186
)
$
873

 
 
 
 
 
 
 
 
Southern Power
 
 
 
 
 
 
 
Other intangible assets subject to amortization:
 
 
 
 
 
 
 
PPA fair value adjustments (b)
$
405

$
(61
)
$
344

 
$
456

$
(47
)
$
409

 
 
 
 
 
 
 
 
Southern Company Gas
 
 
 
 
 
 
 
Other intangible assets subject to amortization:
 
 
 
 
 
 
 
Gas marketing services (a)
 
 
 
 
 
 
 
Customer relationships
$
156

$
(84
)
$
72

 
$
221

$
(77
)
$
144

Trade names
26

(7
)
19

 
115

(9
)
106

Wholesale gas services
 
 
 
 
 
 
 
Storage and transportation contracts
64

(54
)
10

 
64

(34
)
30

Total other intangible assets subject to amortization
$
246

$
(145
)
$
101

 
$
400

$
(120
)
$
280

(a)
Balances as of December 31, 2018 reflect the sale of Pivotal Home Solutions. See Note 15 under " Southern Company Gas Sale of Pivotal Home Solutions " for additional information.
(b)
Balances as of December 31, 2018 exclude Plant Mankato-related intangible assets that were reclassified as assets held for sale. See Note 15 under "Southern Power – Sales of Natural Gas Plants " for additional information.
Amortization associated with other intangible assets in 2018 , 2017 , and 2016 was as follows:
 
2018
2017
2016
 
(in millions)
Southern Company
$
89

$
124

$
50

Southern Power
$
25

$
25

$
10


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Successor
 
 
Predecessor
 
Year Ended December 31, 2018
Year Ended December 31, 2017
July 1, 2016
through
December 31, 2016
 
 
January 1, 2016 through
June 30, 2016
 
(in millions)
 
 
(in millions)
Southern Company Gas:
 
 
 
 
 
 
Wholesale gas services (a)
$
20

$
32

$
2

 
 
$

Gas marketing services (b)
32

54

32

 
 
8

(a)
Recorded as a reduction to operating revenues.
(b)
Included in depreciation and amortization.
At December 31, 2018 , the estimated amortization associated with other intangible assets for the next five years is as follows:
 
2019
2020
2021
2022
2023
 
(in millions)
Southern Company (*)
$
61

$
50

$
43

$
39

$
38

Southern Power (*)
20

20

20

20

20

Southern Company Gas
29

19

13

10

9

(*)
Excludes amounts related to held for sale assets. See Note 15 under "Southern Power – Sales of Natural Gas Plants " for additional information.
Included in other deferred credits and liabilities on the balance sheet is $91 million of intangible liabilities that were recorded during acquisition accounting for transportation contracts at Southern Company Gas. At December 31, 2018 , the accumulated amortization of these intangible liabilities was $74 million . In 2019, the remaining $17 million of amortization associated with the intangible liabilities will be recorded in natural gas revenues.
Acquisition Accounting
At the time of an acquisition, management will assess whether acquired assets and activities meet the definition of a business. For acquisitions that meet the definition of a business, operating results from the date of acquisition are included in the acquiring entity's financial statements. The purchase price, including any contingent consideration, is allocated based on the fair value of the identifiable assets acquired and liabilities assumed (including any intangible assets). Assets acquired that do not meet the definition of a business are accounted for as an asset acquisition.
The purchase price of each asset acquisition is allocated based on the relative fair value of assets acquired. Determining the fair value of assets acquired and liabilities assumed requires management judgment and management may engage independent valuation experts to assist in this process. Fair values are determined by using market participant assumptions and typically include the timing and amounts of future cash flows, incurred construction costs, the nature of acquired contracts, discount rates, power market prices, and expected asset lives. Any due diligence or transition costs incurred for potential or successful acquisitions are expensed as incurred.
Historically, contingent consideration primarily relates to fixed amounts due to the seller once an acquired construction project is placed in service. For contingent consideration with variable payments, management fair values the arrangement with any changes recorded in the statements of income. See Note 13 for additional fair value information.
Development Costs
For Southern Power, development costs are capitalized once a project is probable of completion, primarily based on a review of its economics and operational feasibility, as well as status of power off-take agreements and regulatory approvals, if applicable. Southern Power's capitalized development costs are included in CWIP on the balance sheets. All of Southern Power's development costs incurred prior to the determination that a project is probable of completion are expensed as incurred and included in other operations and maintenance expense in the statements of income. If it is determined that a project is no longer probable of completion, any of Southern Power's capitalized development costs are expensed and included in other operations and maintenance expense in the statements of income.
Long-Term Service Agreements
The traditional electric operating companies and Southern Power have entered into LTSAs for the purpose of securing maintenance support for certain of their generating facilities. The LTSAs cover all planned inspections on the covered equipment,

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which generally includes the cost of all labor and materials. The LTSAs also obligate the counterparties to cover the costs of unplanned maintenance on the covered equipment subject to limits and scope specified in each contract.
Payments made under the LTSAs for the performance of any planned inspections or unplanned capital maintenance are recorded in the statements of cash flows as investing activities. Receipts of major parts into materials and supplies inventory prior to planned inspections are treated as noncash transactions in the statements of cash flows. Any payments made prior to the work being performed are recorded as prepayments in other current assets and noncurrent assets on the balance sheets. At the time work is performed, an appropriate amount is accrued for future payments or transferred from the prepayment and recorded as property, plant, and equipment or expensed.
Transmission Receivables/Prepayments
As a result of Southern Power's acquisition and construction of generating facilities, Southern Power has transmission receivables and/or prepayments representing the portion of interconnection network and transmission upgrades that will be reimbursed to Southern Power. Upon completion of the related project, transmission costs are generally reimbursed by the interconnection provider within a five -year period and the receivable/prepayments are reduced as payments or services are received.
Cash and Cash Equivalents
For purposes of the financial statements, temporary cash investments are considered cash equivalents. Temporary cash investments are securities with original maturities of 90 days or less.
Restricted Cash
The registrants adopted ASU 2016-18 as of January 1, 2018. See " Recently Adopted Accounting Standards Other " herein for additional information.
At December 31, 2018 , Georgia Power had restricted cash related to the redemption of pollution control revenue bonds, which were redeemed subsequent to December 31, 2018 . See Note 8 under " Long-term Debt Pollution Control Revenue Bonds " for additional information. At December 31, 2017 , Southern Power had restricted cash primarily related to certain acquisitions and construction projects. At December 31, 2018 and 2017 , Southern Company Gas had restricted cash held as collateral for worker's compensation, life insurance, and long-term disability insurance.
The following tables provide a reconciliation of cash, cash equivalents, and restricted cash reported within the balance sheets that total to the amounts shown in the statements of cash flows for the registrants that had restricted cash at December 31, 2018 and/or 2017 :
 
Southern
Company
Georgia
Power
Southern
Company Gas
 
(in millions)
At December 31, 2018
 
 
 
Cash and cash equivalents
$
1,396

$
4

$
64

Cash and cash equivalents classified as assets held for sale
9



Restricted cash:






Restricted cash

108


Other accounts and notes receivable
114


6

Total cash, cash equivalents, and restricted cash
$
1,519

$
112

$
70


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Southern Company and Subsidiary Companies 2018 Annual Report

 
Southern
Company
Southern
Power
Southern
Company Gas
 
(in millions)
At December 31, 2017
 
 
 
Cash and cash equivalents
$
2,130

$
129

$
73

Restricted cash:
 
 
 
Other accounts and notes receivable
5


5

Deferred charges and other assets
12

11


Total cash, cash equivalents, and restricted cash
$
2,147

$
140

$
78

Storm Damage Reserves
Each traditional electric operating company maintains a reserve to cover or is allowed to defer and recover the cost of damages from major storms to its transmission and distribution lines and, for Mississippi Power, the cost of uninsured damages to its generation facilities and other property. In accordance with their respective state PSC orders, the traditional electric operating companies accrued the following amounts related to storm damage reserves in 2018 , 2017 , and 2016 :
 
Southern
Company (*)
Alabama
Power
Georgia
Power
Mississippi
Power
 
(in millions)
2018
$
74

$
16

$
30

$
1

2017
41

4

30

3

2016
40

3

30

4

(*)
Includes accruals at Gulf Power of $26.9 million in 2018 and $3.5 million in each of 2017 and 2016 . See Note 15 under " Southern Company's Sale of Gulf Power " for information regarding the sale of Gulf Power.
Alabama Power and Mississippi Power also have authority based on orders from their state PSCs to accrue certain additional amounts as circumstances warrant. There were no such additional accruals for Alabama Power and Mississippi Power in any year presented.
See Note 2 under " Alabama Power Rate NDR ," " Georgia Power Storm Damage Recovery ," and " Mississippi Power System Restoration Rider " for additional information regarding each company's storm damage reserve.
Leveraged Leases
A subsidiary of Southern Holdings has several leveraged lease agreements, with original terms ranging up to 45 years , which relate to international and domestic energy generation, distribution, and transportation assets. Southern Company receives federal income tax deductions for depreciation and amortization, as well as interest on long-term debt related to these investments. Southern Company reviews all important lease assumptions at least annually, or more frequently if events or changes in circumstances indicate that a change in assumptions has occurred or may occur. These assumptions include the effective tax rate, the residual value, the credit quality of the lessees, and the timing of expected tax cash flows.
The ability of the lessees to make required payments to the Southern Holdings subsidiary is dependent on the operational performance of the assets. In 2017, the financial and operational performance of one of the lessees and the associated generation assets raised significant concerns about the short-term ability of the generation assets to produce cash flows sufficient to support ongoing operations and the lessee's contractual obligations and its ability to make the remaining semi-annual lease payments to the Southern Holdings subsidiary beginning in June 2018. As a result of operational improvements in 2018, the 2018 lease payments were paid in full. However, operational issues and the resulting cash liquidity challenges persist and significant concerns continue regarding the lessee's ability to make the remaining semi-annual lease payments. These operational challenges may also impact the expected residual value of the assets at the end of the lease term in 2047. If any future lease payment is not paid in full, the Southern Holdings subsidiary may be unable to make its corresponding payment to the holders of the underlying non-recourse debt related to the generation assets. Failure to make the required payment to the debtholders could represent an event of default that would give the debtholders the right to foreclose on, and take ownership of, the generation assets from the Southern Holdings subsidiary, in effect terminating the lease and resulting in the write-off of the related lease receivable, which would result in a reduction in net income of approximately $86 million after tax based on the lease receivable balance at December 31, 2018 . Southern Company has evaluated the recoverability of the lease receivable and the expected residual value of

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the generation assets at the end of the lease under various scenarios and has concluded that its investment in the leveraged lease is not impaired at December 31, 2018 . Southern Company will continue to monitor the operational performance of the underlying assets and evaluate the ability of the lessee to continue to make the required lease payments. The ultimate outcome of this matter cannot be determined at this time.
Southern Company's net investment in domestic and international leveraged leases consists of the following at December 31:
 
2018
 
2017
 
(in millions)
Net rentals receivable
$
1,563

 
$
1,498

Unearned income
(765
)
 
(723
)
Investment in leveraged leases
798

 
775

Deferred taxes from leveraged leases
(255
)
 
(252
)
Net investment in leveraged leases
$
543

 
$
523

A summary of the components of income from the leveraged leases follows:
 
2018
 
2017
 
2016
 
(in millions)
Pretax leveraged lease income
$
25

 
$
25

 
$
25

Net impact of Tax Reform Legislation

 
48

 

Income tax expense
(6
)
 
(9
)
 
(9
)
Net leveraged lease income
$
19

 
$
64

 
$
16

Materials and Supplies
Materials and supplies for the traditional electric operating companies generally includes the average cost of transmission, distribution, and generating plant materials. Materials and supplies for Southern Company Gas generally includes propane gas inventory, fleet fuel, and other materials and supplies. Materials and supplies for Southern Power generally includes the average cost of generating plant materials.
Materials are recorded to inventory when purchased and then expensed or capitalized to property, plant, and equipment, as appropriate, at weighted average cost when installed. In addition, certain major parts are recorded as inventory when acquired and then capitalized at cost when installed to property, plant, and equipment.
Fuel Inventory
Fuel inventory for the traditional electric operating companies includes the average cost of coal, natural gas, oil, transportation, and emissions allowances. Fuel inventory for Southern Power, which is included in other current assets, includes the average cost of oil, natural gas, biomass, and emissions allowances. Fuel is recorded to inventory when purchased and then expensed, at weighted average cost, as used. Emissions allowances granted by the EPA are included in inventory at zero cost. The traditional electric operating companies recover fuel expense through fuel cost recovery rates approved by each state PSC or, for wholesale rates, the FERC.
Natural Gas for Sale
With the exception of Nicor Gas, the natural gas distribution utilities record natural gas inventories on a WACOG basis. In Georgia's deregulated, competitive environment, Marketers sell natural gas to firm end-use customers at market-based prices. On a monthly basis, Atlanta Gas Light assigns to Marketers the majority of the pipeline storage services that it has under contract, along with a corresponding amount of inventory. Atlanta Gas Light retains and manages a portion of its pipeline storage assets and related natural gas inventories for system balancing and to serve system demand.
Nicor Gas' natural gas inventory is carried at cost on a LIFO basis. Inventory decrements occurring during the year that are restored prior to year end are charged to cost of natural gas at the estimated annual replacement cost. Inventory decrements that are not restored prior to year end are charged to cost of natural gas at the actual LIFO cost of the inventory layers liquidated. The cost of natural gas, including inventory costs, is recovered from customers under a purchased gas recovery mechanism adjusted

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for differences between actual costs and amounts billed; therefore, LIFO liquidations have no impact on Southern Company's or Southern Company Gas' net income. At December 31, 2018 , the Nicor Gas LIFO inventory balance was $165 million . Based on the average cost of gas purchased in December 2018 , the estimated replacement cost of Nicor Gas' inventory at December 31, 2018 was $409 million . During 2018 , Nicor Gas did not liquidate any LIFO-based inventory.
Southern Company Gas' gas marketing services, wholesale gas services, and all other segments record inventory at LOCOM, with cost determined on a WACOG basis. For these segments, Southern Company Gas evaluates the weighted average cost of its natural gas inventories against market prices to determine whether any declines in market prices below the WACOG are other than temporary. For any declines considered to be other than temporary, Southern Company Gas recorded LOCOM adjustments to cost of natural gas to reduce the value of its natural gas inventories to market value. LOCOM adjustments were $10 million during 2018 for wholesale gas services and immaterial for all other periods presented.
Energy Marketing Receivables and Payables
Southern Company Gas' wholesale gas services provides services to retail gas marketers, wholesale gas marketers, utility companies, and industrial customers. These counterparties utilize netting agreements that enable wholesale gas services to net receivables and payables by counterparty upon settlement. Southern Company Gas' wholesale gas services also nets across product lines and against cash collateral, provided the netting and cash collateral agreements include such provisions. While the amounts due from, or owed to, wholesale gas services' counterparties are settled net, they are recorded on a gross basis in the balance sheets as energy marketing receivables and energy marketing payables.
Southern Company Gas' wholesale gas services has trade and credit contracts that contain minimum credit rating requirements. These credit rating requirements typically give counterparties the right to suspend or terminate credit if Southern Company Gas' credit ratings are downgraded to non-investment grade status. Under such circumstances, Southern Company Gas' wholesale gas services would need to post collateral to continue transacting business with some of its counterparties. As of December 31, 2018 and 2017 , the required collateral in the event of a credit rating downgrade was $30 million and $8 million , respectively.
Credit policies were established to determine and monitor the creditworthiness of counterparties, including requirements to post collateral or other credit security, as well as the quality of pledged collateral. Collateral or credit security is most often in the form of cash or letters of credit from an investment-grade financial institution, but may also include cash or U.S. government securities held by a trustee. When Southern Company Gas' wholesale gas services is engaged in more than one outstanding derivative transaction with the same counterparty and it also has a legally enforceable netting agreement with that counterparty, the "net" mark-to-market exposure represents the netting of the positive and negative exposures with that counterparty combined with a reasonable measure of Southern Company Gas' credit risk. Southern Company Gas' wholesale gas services also uses other netting agreements with certain counterparties with whom it conducts significant transactions.
See " Concentration of Credit Risk " herein for additional information.
Provision for Uncollectible Accounts
The customers of the traditional electric operating companies and natural gas distribution utilities are billed monthly. For the majority of receivables, a provision for uncollectible accounts is established based on historical collection experience and other factors. For the remaining receivables, if the company is aware of a specific customer's inability to pay, a provision for uncollectible accounts is recorded to reduce the receivable balance to the amount reasonably expected to be collected. If circumstances change, the estimate of the recoverability of accounts receivable could change as well. Circumstances that could affect this estimate include, but are not limited to, customer credit issues, customer deposits, and general economic conditions. Customers' accounts are written off once they are deemed to be uncollectible. For all periods presented, uncollectible accounts averaged less than 1% of revenues for each registrant.
Credit risk exposure at Nicor Gas is mitigated by a bad debt rider approved by the Illinois Commission. The bad debt rider provides for the recovery from (or refund to) customers of the difference between Nicor Gas' actual bad debt experience on an annual basis and the benchmark bad debt expense used to establish its base rates for the respective year.
Concentration of Credit Risk
Southern Company Gas' wholesale gas services business has a concentration of credit risk for services it provides to its counterparties. This credit risk is generally concentrated in 20 of its counterparties and is measured by 30-day receivable exposure plus forward exposure. Counterparty credit risk is evaluated using a S&P equivalent credit rating, which is determined by a process of converting the lower of the S&P or Moody's rating to an internal rating ranging from 9 to 1 , with 9 being equivalent to AAA/Aaa by S&P and Moody's, respectively, and 1 being equivalent to D/Default by S&P and Moody's, respectively. A counterparty that does not have an external rating is assigned an internal rating based on the strength of its financial ratios. As of

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December 31, 2018 , the top 20 counterparties represented 48% , or $298 million , of the total counterparty exposure and had a weighted average S&P equivalent rating of A-.
Concentration of credit risk occurs at Atlanta Gas Light for amounts billed for services and other costs to its customers, which consist of 15 Marketers in Georgia (including SouthStar). The credit risk exposure to Marketers varies seasonally, with the lowest exposure in the non-peak summer months and the highest exposure in the peak winter months. Marketers are responsible for the retail sale of natural gas to end-use customers in Georgia. The functions of the retail sale of gas include the purchase and sale of natural gas, customer service, billings, and collections. The provisions of Atlanta Gas Light's tariff allow Atlanta Gas Light to obtain credit security support in an amount equal to a minimum of two times a Marketer's highest month's estimated bill from Atlanta Gas Light.
Financial Instruments
The traditional electric operating companies and Southern Power use derivative financial instruments to limit exposure to fluctuations in interest rates, the prices of certain fuel purchases, electricity purchases and sales, and occasionally foreign currency exchange rates. Southern Company Gas uses derivative financial instruments to limit exposure to fluctuations in natural gas prices, weather, interest rates, and commodity prices. All derivative financial instruments are recognized as either assets or liabilities on the balance sheets (included in "Other" or shown separately as "Risk Management Activities") and are measured at fair value. See Note 13 for additional information regarding fair value. Substantially all of the traditional electric operating companies' and Southern Power's bulk energy purchases and sales contracts that meet the definition of a derivative are excluded from fair value accounting requirements because they qualify for the "normal" scope exception, and are accounted for under the accrual method. Derivative contracts that qualify as cash flow hedges of anticipated transactions or are recoverable through the traditional electric operating companies' and the natural gas distribution utilities' fuel-hedging programs result in the deferral of related gains and losses in AOCI or regulatory assets and liabilities, respectively, until the hedged transactions occur. For 2017 and 2016, ineffectiveness arising from cash flow hedges was recognized in net income. Upon the adoption of ASU 2017-12 in 2018, ineffectiveness is no longer separately measured and recorded in earnings. See " Recently Adopted Accounting Standards " herein for additional information. Other derivative contracts that qualify as fair value hedges are marked to market through current period income and are recorded on a net basis in the statements of income. Cash flows from derivatives are classified on the statements of cash flows in the same category as the hedged item. See Note 14 for additional information regarding derivatives.
The registrants offset fair value amounts recognized for multiple derivative instruments executed with the same counterparty under netting arrangements. The registrants had no outstanding collateral repayment obligations or rights to reclaim collateral arising from derivative instruments recognized at December 31, 2018 .
The registrants are exposed to potential losses related to financial instruments in the event of counterparties' nonperformance. The registrants have established risk management policies and controls to determine and monitor the creditworthiness of counterparties in order to mitigate their exposure to counterparty credit risk.
Southern Company Gas
Southern Company Gas enters into weather derivative contracts as economic hedges of natural gas revenues in the event of warmer-than-normal weather in the Heating Season. Exchange-traded options are carried at fair value, with changes reflected in natural gas revenues. Non-exchange-traded options are accounted for using the intrinsic value method. Changes in the intrinsic value for non-exchange-traded contracts are also reflected in natural gas revenues in the statements of income.
Wholesale gas services purchases natural gas for storage when the current market price paid to buy and transport natural gas plus the cost to store and finance the natural gas is less than the market price that can be received in the future, resulting in positive net natural gas revenues. NYMEX futures and OTC contracts are used to sell natural gas at that future price to substantially protect the natural gas revenues that will ultimately be realized when the stored natural gas is sold. Southern Company Gas enters into transactions to secure transportation capacity between delivery points in order to serve its customers and various markets. NYMEX futures and OTC contracts are used to capture the price differential or spread between the locations served by the capacity in order to substantially protect the natural gas revenues that will ultimately be realized when the physical flow of natural gas between delivery points occurs. These contracts generally meet the definition of derivatives and are carried at fair value on the balance sheets, with changes in fair value recorded in natural gas revenues on the statements of income in the period of change. These contracts are not designated as hedges for accounting purposes.
The purchase, transportation, storage, and sale of natural gas are accounted for on a weighted average cost or accrual basis, as appropriate, rather than on the fair value basis utilized for the derivatives used to mitigate the natural gas price risk associated with the storage and transportation portfolio. Monthly demand charges are incurred for the contracted storage and transportation

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capacity and payments associated with asset management agreements, and these demand charges and payments are recognized on the statements of income in the period they are incurred. This difference in accounting methods can result in volatility in reported earnings, even though the economic margin is substantially unchanged from the dates the transactions were consummated.
Comprehensive Income
The objective of comprehensive income is to report a measure of all changes in common stock equity of an enterprise that result from transactions and other economic events of the period other than transactions with owners. Comprehensive income consists of net income attributable to the registrant, changes in the fair value of qualifying cash flow hedges, and reclassifications for amounts included in net income. Comprehensive income also consists of certain changes in pension and other postretirement benefit plans for Southern Company, Southern Power, and Southern Company Gas.
AOCI (loss) balances, net of tax effects, for Southern Company, Southern Power, and Southern Company Gas were as follows:
 
Qualifying
Hedges
 
Pension and Other
Postretirement
Benefit Plans
 
Accumulated Other
Comprehensive
Income (Loss)
 
(in millions)
Southern Company
 
 
 
 
 
Balance at December 31, 2017
$
(119
)
 
$
(70
)
 
$
(189
)
Adjustment to beginning balance (*)
(26
)
 
(14
)
 
(40
)
Current period change
24

 
2

 
26

Balance at December 31, 2018
$
(121
)
 
$
(82
)
 
$
(203
)
 
 
 
 
 
 
Southern Power
 
 
 
 
 
Balance at December 31, 2017
$
25

 
$
(27
)
 
$
(2
)
Adjustment to beginning balance (*)
4

 

 
4

Current period change
7

 
7

 
14

Balance at December 31, 2018
$
36

 
$
(20
)
 
$
16

 
 
 
 
 
 
Southern Company Gas
 
 
 
 
 
Balance at December 31, 2017
$
(6
)
 
$
26

 
$
20

Adjustment to beginning balance (*)
(1
)
 
5

 
4

Current period change
4

 
(2
)
 
2

Balance at December 31, 2018
$
(3
)
 
$
29

 
$
26

(*)
Reflects the reclassification related to stranded tax effects resulting from the Tax Reform Legislation as allowed by ASU 2018-02. See " Recently Adopted Accounting Standards Other " herein for additional information.
Variable Interest Entities
The primary beneficiary of a VIE is required to consolidate the VIE when it has both the power to direct the activities of the VIE that most significantly impact the VIE's economic performance and the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE. See Note 7 for additional information regarding VIEs.
Alabama Power has established a wholly-owned trust to issue preferred securities. See Note 8 under " Long-term Debt Other Long-Term Debt Alabama Power " for additional information. However, Alabama Power is not considered the primary beneficiary of the trust. Therefore, the investment in the trust is reflected as other investments, and the related loan from the trust is reflected as long-term debt in Alabama Power's balance sheets.

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2 . REGULATORY MATTERS
Southern Company
Regulatory Assets and Liabilities
Regulatory assets and (liabilities) reflected in the consolidated balance sheets of Southern Company at December 31, 2018 and 2017 relate to:
 
2018
 
2017
 
Note
 
(in millions)
 
 
Retiree benefit plans
$
3,658

 
$
3,931

 
(a,p)
Asset retirement obligations-asset
2,933

 
1,133

 
(b,p)
Deferred income tax charges
799

 
814

 
(b,o)
Property damage reserves-asset
416

 
333

 
(c)
Under recovered regulatory clause revenues
407

 
317

 
(d)
Environmental remediation-asset
366

 
511

 
(e,p)
Loss on reacquired debt
346

 
223

 
(f)
Remaining net book value of retired assets
211

 
306

 
(g)
Vacation pay
182

 
183

 
(h,p)
Long-term debt fair value adjustment
121

 
138

 
(i)
Deferred PPA charges

 
119

 
(j,p)
Other regulatory assets
581

 
625

 
(k)
Deferred income tax credits
(6,455
)
 
(7,261
)
 
(b,o)
Other cost of removal obligations
(2,297
)
 
(2,684
)
 
(b)
Customer refunds
(293
)
 
(188
)
 
(n)
Property damage reserves-liability
(76
)
 
(135
)
 
(l)
Over recovered regulatory clause revenues
(47
)
 
(155
)
 
(d)
Other regulatory liabilities
(132
)
 
(104
)
 
(m)
Total regulatory assets (liabilities), net
$
720

 
$
(1,894
)
 
 
Note: Unless otherwise noted, the recovery and amortization periods for these regulatory assets and (liabilities) are approved by the respective PSC or regulatory agency and are as follows:
(a)
Recovered and amortized over the average remaining service period which may range up to 15 years . See Note 11 for additional information.
(b)
Asset retirement and other cost of removal obligations are recorded, deferred income tax assets are recovered, and deferred income tax liabilities are amortized over the related property lives, which may range up to 80 years . Asset retirement and removal liabilities will be settled and trued up following completion of the related activities. Included in the deferred income tax assets is $28 million for the retiree Medicare drug subsidy, which is being recovered and amortized through 2027.
(c)
Through 2019, Georgia Power is recovering approximately $30 million annually for storm damage, which is expected to be adjusted in the Georgia Power 2019 Base Rate Case. See " Georgia Power Storm Damage Recovery " herein for additional information.
(d)
Recorded and recovered or amortized over periods generally not exceeding 10 years .
(e)
Recovered through environmental cost recovery mechanisms when the remediation is performed or the work is performed.
(f)
Recovered over either the remaining life of the original issue or, if refinanced, over the remaining life of the new issue, which may range up to 50 years .
(g)
Amortized over periods not exceeding eight years .
(h)
Recorded as earned by employees and recovered as paid, generally within one year . This includes both vacation and banked holiday pay.
(i)
Recovered over the remaining life of the original debt issuances, which range up to 20 years . For additional information see Note 15 under " Southern Company Merger with Southern Company Gas ."
(j)
Related to Gulf Power and reclassified as assets held for sale at December 31, 2018. See Note 15 under " Southern Company's Sale of Gulf Power " for information regarding the sale of Gulf Power.
(k)
Comprised of numerous immaterial components including nuclear outage, fuel-hedging losses, cancelled construction projects, building and generating plant leases, property tax, and other miscellaneous assets. These costs are recorded and recovered or amortized over periods generally not exceeding 50 years .
(l)
Amortized as storm restoration and potential reliability-related expenses are incurred.
(m)
Comprised of numerous components including retiree benefit plans, fuel-hedging gains, AROs, and other liabilities that are recorded and recovered or amortized over periods not exceeding 20 years .
(n)
At December 31, 2018, represents amounts accrued and outstanding for refund, including approximately $109 million as a result of Alabama Power's 2018 retail return exceeding the allowed range, approximately $55 million pursuant to the Georgia Power Tax Reform Settlement Agreement, and approximately $100 million , subject to review and approval by the Georgia PSC, as a result of Georgia Power's 2018 retail ROE exceeding the allowed retail ROE range. See "Alabama Power – Rate RSE " and " Georgia Power Rate Plans " herein for additional information.
(o)
As a result of the Tax Reform Legislation, these accounts include certain deferred income tax assets and liabilities not subject to normalization. The recovery and amortization of these amounts will be determined in future rate proceedings. See "Georgia Power," "Mississippi Power," and "Southern Company Gas" herein and Note 10 for additional information.
(p)
Not earning a return as offset in rate base by a corresponding asset or liability.

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Gulf Power
On January 1, 2019, Southern Company completed its sale of Gulf Power to NextEra Energy. See Note 15 under " Southern Company's Sale of Gulf Power " for additional information.
In accordance with a Florida PSC-approved settlement agreement, Gulf Power's rates effective for the first billing cycle in July 2017 increased by approximately $54 million annually (2017 Gulf Power Rate Case Settlement), including a $62 million increase in base revenues, less an $8 million purchased power capacity cost recovery clause credit. The 2017 Rate Case Settlement Agreement also resulted in a $32.5 million write-down of Gulf Power's ownership of Plant Scherer Unit 3, which was recorded in the first quarter 2017.
As a continuation of the 2017 Gulf Power Rate Case Settlement Agreement, on March 26, 2018, the Florida PSC approved a stipulation and settlement agreement addressing Gulf Power's retail revenue requirement effects of the Tax Reform Legislation (Gulf Power Tax Reform Settlement Agreement). Beginning in April 1, 2018, the Gulf Power Tax Reform Settlement Agreement resulted in annual reductions of approximately $18 million to Gulf Power's base rates and approximately $16 million to Gulf Power's environmental cost recovery rates and a one-time refund of approximately $69 million for the retail portion of unprotected (not subject to normalization) deferred tax liabilities, which was credited to customers through Gulf Power's fuel cost recovery rates over the remainder of 2018.

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Alabama Power
Regulatory Assets and Liabilities
Regulatory assets and (liabilities) reflected in the balance sheets of Alabama Power at December 31, 2018 and 2017 relate to:
 
2018
 
2017
 
Note
 
(in millions)
 
 
Retiree benefit plans
$
947

 
$
946

 
(a,p)
Deferred income tax charges
241

 
240

 
(b,c,d,)
Under recovered regulatory clause revenues
176

 
53

 
(e)
Asset retirement obligations
147

 
(33
)
 
(b)
Regulatory clauses
142

 
142

 
(f)
Vacation pay
71

 
70

 
(g,p)
Loss on reacquired debt
56

 
62

 
(h)
Nuclear outage
49

 
56

 
(i)
Remaining net book value of retired assets
43

 
54

 
(j)
Other regulatory assets
57

 
58

 
(k,l)
Deferred income tax credits
(2,027
)
 
(2,082
)
 
(b,d)
Other cost of removal obligations
(497
)
 
(609
)
 
(b)
Rate RSE refund
(109
)
 

 
(m)
Natural disaster reserve
(20
)
 
(38
)
 
(n)
Other regulatory liabilities
(45
)
 
(7
)
 
(l,o)
Total regulatory assets (liabilities), net
$
(769
)
 
$
(1,088
)
 
 
Note: Unless otherwise noted, the recovery and amortization periods for these regulatory assets and (liabilities) have been accepted or approved by the Alabama PSC and are as follows:
(a)
Recovered and amortized over the average remaining service period which may range up to 15 years . See Note  11 for additional information.
(b)
Asset retirement and removal assets and liabilities are recorded, deferred income tax assets are recovered, and deferred income tax credits are amortized over the related property lives, which may range up to 50 years . Asset retirement and other cost of removal assets and liabilities will be settled and trued up following completion of the related activities.
(c)
Included in the deferred income tax charges are $10 million for 2018 and $13 million for 2017 for the retiree Medicare drug subsidy, which is being recovered and amortized through 2027.
(d)
As a result of the Tax Reform Legislation, these accounts include certain deferred income tax assets and liabilities not subject to normalization. The recovery and amortization of these amounts will occur ratably over the related property lives, which may range up to 50 years . See Note 10 for additional information.
(e)
Recorded and recovered or amortized over periods not exceeding 10 years . See "Rate CNP PPA," " Rate CNP Compliance ," and" Rate ECR " herein for additional information.
(f)
Will be amortized concurrently with the effective date of Alabama Power's next depreciation study. See " Rate RSE " herein for additional information.
(g)
Recorded as earned by employees and recovered as paid, generally within one year . This includes both vacation and banked holiday pay.
(h)
Recovered over the remaining life of the original issue, which may range up to 50 years .
(i)
Nuclear outage costs are deferred to a regulatory asset when incurred and amortized over a subsequent 18 -month period.
(j)
Recorded and amortized over remaining periods up to 8 years .
(k)
Comprised of components including generation site selection/evaluation costs, PPA capacity (to be recovered over the next 12 months ), and other miscellaneous assets. Capitalized upon initialization of related construction projects, if applicable.
(l)
Fuel-hedging assets and liabilities are recorded over the life of the underlying hedged purchase contracts, which generally do not exceed three and a half years. Upon final settlement, actual costs incurred are recovered through the energy cost recovery clause.
(m)
Refund accrued as a result of the 2018 retail return exceeding the allowed range. See " Rate RSE " herein for additional information.
(n)
Amortized as storm restoration and potential reliability-related expenses are incurred.
(o)
Comprised of several components, primarily $33 million deferred as a result of the Alabama PSC accounting order regarding the Tax Reform Legislation. See "Tax Reform Accounting Order" herein for additional information.
(p)
Not earning a return as offset in rate base by a corresponding asset or liability.

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Rate RSE
The Alabama PSC has adopted Rate RSE that provides for periodic annual adjustments based upon Alabama Power's projected weighted common equity return (WCER) compared to an allowable range. Rate RSE adjustments are based on forward-looking information for the applicable upcoming calendar year. Rate RSE adjustments for any two -year period, when averaged together, cannot exceed 4.0% and any annual adjustment is limited to 5.0% . When the projected WCER is under the allowed range, there is an adjusting point of 5.98% and eligibility for a performance-based adder of seven basis points, or 0.07% , to the WCER adjusting point if Alabama Power (i) has an "A" credit rating equivalent with at least one of the recognized rating agencies or (ii) is in the top one-third of a designated customer value benchmark survey. If Alabama Power's actual retail return is above the allowed WCER range, the excess will be refunded to customers unless otherwise directed by the Alabama PSC; however, there is no provision for additional customer billings should the actual retail return fall below the WCER range. Prior to January 2019, retail rates remained unchanged when the WCER range was between 5.75% and 6.21% .
At December 31, 2016, Alabama Power's retail return exceeded the allowed WCER range which resulted in Alabama Power establishing a $73 million Rate RSE refund liability. In accordance with an Alabama PSC order issued in February 2017, Alabama Power applied the full amount of the refund to reduce the under recovered balance of Rate CNP PPA as discussed further below.
Effective in January 2017, Rate RSE increased 4.48% , or $245 million annually. At December 31, 2017, Alabama Power's actual retail return was within the allowed WCER range. Retail rates under Rate RSE were unchanged for 2018.
In conjunction with Rate RSE, Alabama Power has an established retail tariff that provides for an adjustment to customer billings to recognize the impact of a change in the statutory income tax rate. In accordance with this tariff, Alabama Power returned $267 million to retail customers through bill credits during 2018 as a result of the change in the federal income tax rate under the Tax Reform Legislation.
On May 1, 2018, the Alabama PSC approved modifications to Rate RSE and other commitments designed to position Alabama Power to address the growing pressure on its credit quality resulting from the Tax Reform Legislation, without increasing retail rates under Rate RSE in the near term. Alabama Power plans to reduce growth in total debt by increasing equity, with corresponding reductions in debt issuances, thereby de-leveraging its capital structure. Alabama Power's goal is to achieve an equity ratio of approximately 55% by the end of 2025. At December 31, 2018, Alabama Power's equity ratio was approximately 47% .
The approved modifications to Rate RSE began for billings in January 2019. The modifications include reducing the top of the allowed WCER range from 6.21% to 6.15% and modifications to the refund mechanism applicable to prior year actual results. The modifications to the refund mechanism allow Alabama Power to retain a portion of the revenue that causes the actual WCER for a given year to exceed the allowed range.
Generally, if Alabama Power's actual WCER is between 6.15% and 7.65% , customers will receive 25% of the amount between 6.15% and 6.65% , 40% of the amount between 6.65% and 7.15% , and 75% of the amount between 7.15% and 7.65% . Customers will receive all amounts in excess of an actual WCER of 7.65% .
In conjunction with these modifications to Rate RSE, on May 8, 2018, Alabama Power consented to a moratorium on any upward adjustments under Rate RSE for 2019 and 2020 and will also return $50 million to customers through bill credits in 2019.
On November 30, 2018, Alabama Power made its required annual Rate RSE submission to the Alabama PSC of projected data for calendar year 2019. Projected earnings were within the specified range; therefore, retail rates under Rate RSE remain unchanged for 2019.
At December 31, 2018, Alabama Power's retail return exceeded the allowed WCER range, which resulted in Alabama Power establishing a regulatory liability of $109 million for Rate RSE refunds. In accordance with an Alabama PSC order issued on February 5, 2019, Alabama Power will apply $75 million to reduce the Rate ECR under recovered balance and the remaining $34 million will be refunded to customers through bill credits in July through September 2019.
Rate CNP PPA
Alabama Power's retail rates, approved by the Alabama PSC, provide for adjustments under Rate CNP to recognize the placing of new generating facilities into retail service. Alabama Power may also recover retail costs associated with certificated PPAs under Rate CNP PPA. No adjustments to Rate CNP PPA occurred during the period 2016 through 2018 and no adjustment is expected in 2019. At December 31, 2018 and 2017 , Alabama Power had an under recovered Rate CNP PPA balance of $25 million and $12 million , respectively, which is included in deferred under recovered regulatory clause revenues in the balance sheet.
In accordance with an accounting order issued in February 2017 by the Alabama PSC, Alabama Power eliminated the under recovered balance in Rate CNP PPA at December 31, 2016, which totaled approximately $142 million . As discussed herein under

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"Rate RSE," Alabama Power utilized the full amount of its $73 million Rate RSE refund liability to reduce the amount of the Rate CNP PPA under recovery and reclassified the remaining $69 million to a separate regulatory asset. The amortization of the new regulatory asset through Rate RSE will begin concurrently with the effective date of Alabama Power's next depreciation study, which is expected to occur no later than 2022. Alabama Power's current depreciation study became effective January 1, 2017.
Rate CNP Compliance
Rate CNP Compliance allows for the recovery of Alabama Power's retail costs associated with laws, regulations, and other such mandates directed at the utility industry involving the environment, security, reliability, safety, sustainability, or similar considerations impacting Alabama Power's facilities or operations. Rate CNP Compliance is based on forward-looking information and provides for the recovery of these costs pursuant to a factor that is calculated annually. Compliance costs to be recovered include operations and maintenance expenses, depreciation, and a return on certain invested capital. Revenues for Rate CNP Compliance, as recorded on the financial statements, are adjusted for differences in actual recoverable costs and amounts billed in current regulated rates. Accordingly, changes in the billing factor will have no significant effect on Southern Company's or Alabama Power's revenues or net income, but will affect annual cash flow. Changes in Rate CNP Compliance-related operations and maintenance expenses and depreciation generally will have no effect on Southern Company's or Alabama Power's net income.
In accordance with an accounting order issued in February 2017 by the Alabama PSC, Alabama Power reclassified $36 million of its under recovered balance in Rate CNP Compliance to a separate regulatory asset. The amortization of the new regulatory asset through Rate RSE will begin concurrently with the effective date of Alabama Power's next depreciation study, which is expected to occur no later than 2022. Alabama Power's current depreciation study became effective January 1, 2017.
In December 2017, the Alabama PSC issued a consent order that Alabama Power leave in effect for 2018 the factors associated with Alabama Power's compliance costs for the year 2017, with any under-collected amount for prior years deemed recovered before any current year amounts.
On November 30, 2018, Alabama Power submitted calculations associated with its cost of complying with environmental mandates, as provided under Rate CNP Compliance. The filing reflected a projected unrecovered retail revenue requirement for environmental compliance of approximately $205 million , which is being recovered in the billing months of January 2019 through December 2019.
At December 31, 2018 , Alabama Power had an under recovered Rate CNP Compliance balance of $42 million , which is included in customer accounts receivable, and $17 million at December 31, 2017 included in deferred under recovered regulatory clause revenues in the balance sheet.
Rate ECR
Alabama Power has established energy cost recovery rates under Alabama Power's Rate ECR as approved by the Alabama PSC. Rates are based on an estimate of future energy costs and the current over or under recovered balance. Revenues recognized under Rate ECR and recorded on the financial statements are adjusted for the difference in actual recoverable fuel costs and amounts billed in current regulated rates. The difference in the recoverable fuel costs and amounts billed give rise to the over or under recovered amounts recorded as regulatory assets or liabilities. Alabama Power, along with the Alabama PSC, continually monitors the over or under recovered cost balance to determine whether an adjustment to billing rates is required. Changes in the Rate ECR factor have no significant effect on Southern Company's or Alabama Power's net income, but will impact operating cash flows.
In accordance with an accounting order issued in February 2017 by the Alabama PSC, Alabama Power reclassified $36 million of its under recovered balance in Rate ECR to a separate regulatory asset. The amortization of the new regulatory asset through Rate RSE will begin concurrently with the effective date of Alabama Power's next depreciation study, which is expected to occur no later than 2022. Alabama Power's current depreciation study became effective January 1, 2017.
In December 2017, the Alabama PSC issued a consent order that Alabama Power leave in effect for 2018 the energy cost recovery rates which began in 2017.
On May 1, 2018, the Alabama PSC approved an increase to Rate ECR from 2.015 cents per KWH to 2.353 cents per KWH effective July 2018 through December 2018. On December 4, 2018, the Alabama PSC issued a consent order to leave this rate in effect through December 31, 2019. This change is expected to increase collections by approximately $183 million in 2019. Absent any further order from the Alabama PSC, in January 2020, the rates will return to the originally authorized 5.910 cents per KWH.
As discussed herein under "Rate RSE," in accordance with an Alabama PSC order issued on February 5, 2019, Alabama Power will utilize $75 million of the 2018 Rate RSE refund liability to reduce the Rate ECR under recovered balance.

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At December 31, 2018 , Alabama Power's under recovered fuel costs totaled $109 million , of which $18 million is included in customer accounts receivable and $91 million is included in deferred under recovered regulatory clause revenues on Southern Company's and Alabama Power's balance sheets. At December 31, 2017, Alabama Power had an under recovered fuel balance of $25 million , which was included in deferred under recovered regulatory clause revenues on Southern Company's and Alabama Power's balance sheets. These classifications are based on estimates, which include such factors as weather, generation availability, energy demand, and the price of energy. A change in any of these factors could have a material impact on the timing of any recovery or return of fuel costs.
Tax Reform Accounting Order
On May 1, 2018, the Alabama PSC approved an accounting order that authorized Alabama Power to defer the benefits of federal excess deferred income taxes associated with the Tax Reform Legislation for the year ended December 31, 2018 as a regulatory liability and to use up to $30 million of such deferrals to offset under recovered amounts under Rate ECR. The estimated deferrals for the year ended December 31, 2018 totaled approximately $63 million , subject to adjustment following the filing of the 2018 tax return, of which $30 million was used to offset the Rate ECR under recovered balance and $33 million is recorded in other regulatory liabilities, deferred on the balance sheet to be used for the benefit of customers as determined by the Alabama PSC at a future date. See Note 10 under "Current and Deferred Income Taxes" for additional information.
Software Accounting Order
On February 5, 2019, the Alabama PSC approved an accounting order that authorizes Alabama Power to establish a regulatory asset for operations and maintenance costs associated with software implementation projects. The regulatory asset will be amortized ratably over the life of the related software.
Rate NDR
Based on an order from the Alabama PSC, Alabama Power maintains a reserve for operations and maintenance expenses to cover the cost of damages from major storms to its transmission and distribution facilities. The order approves a separate monthly Rate NDR charge to customers consisting of two components. The first component is intended to establish and maintain a reserve balance for future storms and is an on-going part of customer billing. When the reserve balance falls below $50 million , a reserve establishment charge will be activated (and the on-going reserve maintenance charge concurrently suspended) until the reserve balance reaches $75 million . In December 2017, the reserve maintenance charge was suspended and the reserve establishment charge was activated as a result of the NDR balance falling below $50 million . Alabama Power expects to collect approximately $16 million annually until the reserve balance is restored to $75 million . The NDR balance at December 31, 2018 was $20 million and is included in other regulatory liabilities, deferred on the balance sheet.
The second component of the Rate NDR charge is intended to allow recovery of any existing deferred storm-related operations and maintenance costs and any future reserve deficits over a 24 -month period. The Alabama PSC order gives Alabama Power authority to record a deficit balance in the NDR when costs of storm damage exceed any established reserve balance. Absent further Alabama PSC approval, the maximum total Rate NDR charge consisting of both components is $10 per month per non-residential customer account and $5 per month per residential customer account. Alabama Power has the authority, based on an order from the Alabama PSC, to accrue certain additional amounts as circumstances warrant. The order allows for reliability-related expenditures to be charged against the additional accruals when the NDR balance exceeds $75 million . Alabama Power may designate a portion of the NDR to reliability-related expenditures as a part of an annual budget process for the following year or during the current year for identified unbudgeted reliability-related expenditures that are incurred. Accruals that have not been designated can be used to offset storm charges. Additional accruals to the NDR will enhance Alabama Power's ability to deal with the financial effects of future natural disasters, promote system reliability, and offset costs retail customers would otherwise bear. No such accruals were recorded or designated in any period presented.
As revenue from the Rate NDR charge is recognized, an equal amount of operations and maintenance expenses related to the NDR will also be recognized. As a result, the Rate NDR charge will not have an effect on net income but will impact operating cash flows.
Environmental Accounting Order
Based on an order from the Alabama PSC (Environmental Accounting Order), Alabama Power is allowed to establish a regulatory asset to record the unrecovered investment costs, including the unrecovered plant asset balance and the unrecovered costs associated with site removal and closure associated with future unit retirements caused by environmental regulations. The regulatory asset is being amortized and recovered over the affected unit's remaining useful life, as established prior to the decision regarding early retirement through Rate CNP Compliance. At December 31, 2018, this regulatory asset had a balance of $42

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million , of which $10 million is included in other regulatory assets, current and $32 million is included in other regulatory assets, deferred on the balance sheet.
Subsequent to December 31, 2018, Alabama Power determined that Plant Gorgas Units 8, 9, and 10 (approximately 1,000 MWs) will be retired by April 15, 2019 due to the expected costs of compliance with federal and state environmental regulations. In accordance with the Environmental Accounting Order, approximately $740 million of net investment costs will be transferred to a regulatory asset at the retirement date and recovered over the affected units' remaining useful lives, as established prior to the decision to retire.

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Georgia Power
Regulatory Assets and Liabilities
Regulatory assets and (liabilities) reflected in the balance sheets of Georgia Power at December 31, 2018 and 2017 relate to:
 
2018
 
2017
 
Note
 
(in millions)
 
 
Retiree benefit plans
$
1,295

 
$
1,313

 
(a, l)
Asset retirement obligations
2,644

 
945

 
(b, l)
Deferred income tax charges
522

 
521

 
(b, c, l)
Storm damage reserves
416

 
333

 
(d)
Remaining net book value of retired assets
127

 
146

 
(e)
Loss on reacquired debt
277

 
127

 
(f, l)
Vacation pay
91

 
91

 
(g, l)
Other cost of removal obligations
68

 
40

 
(b)
Environmental remediation
55

 
49

 
(h)
Other regulatory assets
135

 
106

 
(i)
Deferred income tax credits
(3,080
)
 
(3,248
)
 
(b, c)
Customer refunds
(165
)
 
(188
)
 
(j)
Other regulatory liabilities
(7
)
 
(3
)
 
(k, l)
Total regulatory assets (liabilities), net
$
2,378

 
$
232

 
 
Note: Unless otherwise noted, the recovery and amortization periods for these regulatory assets and (liabilities) are approved by the Georgia PSC and are as follows:
(a)
Recovered and amortized over the average remaining service period which may range up to 14 years . See Note 11 for additional information.
(b)
Through 2019, Georgia Power is recovering approximately $60 million annually for AROs, which is expected to be adjusted in the Georgia Power 2019 Base Rate Case. Asset retirement and removal liabilities will be settled and trued up following completion of the related activities. See Note 6 for additional information on AROs. Other cost of removal obligations and deferred income tax assets are recovered and deferred income tax liabilities are amortized over the related property lives, which may range up to 65 years . Included in the deferred income tax assets is $17 million for the retiree Medicare drug subsidy, which is being recovered and amortized through 2022.
(c)
As a result of the Tax Reform Legislation, these balances include $145 million of deferred income tax assets related to CWIP for Plant Vogtle Units 3 and 4 and approximately $610 million of deferred income tax liabilities, neither of which are subject to normalization. The recovery and amortization of these amounts is expected to be determined in the Georgia Power 2019 Base Rate Case. See " Rate Plans " herein and Note 10 for additional information.
(d)
Through 2019, Georgia Power is recovering approximately $30 million annually for storm damage, which is expected to be adjusted in the Georgia Power 2019 Base Rate Case. See " Storm Damage Recovery " herein and Note 1 under "Storm Damage Reserves" for additional information.
(e)
The net book value of Plant Branch Units 1 through 4 at December 31, 2018 was $87 million , which is being amortized over the units' remaining useful lives through 2024. The net book value of Plant Mitchell Unit 3 at December 31, 2018 was $9 million , which will continue to be amortized through December 31, 2019 as provided in the 2013 ARP. Amortization of the remaining approximately $4 million net book value of Plant Mitchell Unit 3 at December 31, 2019 and a total of approximately $31 million related to obsolete inventories of certain retired units is expected to be determined in the Georgia Power 2019 Base Rate Case. See " Integrated Resource Plan " herein for additional information.
(f)
Recovered over either the remaining life of the original issue or, if refinanced, over the remaining life of the new issue, which currently does not exceed 34 years .
(g)
Recorded as earned by employees and recovered as paid, generally within one year . This includes both vacation and banked holiday pay.
(h)
Through 2019, Georgia Power is recovering approximately $2 million annually for environmental remediation, which is expected to be adjusted in the Georgia Power 2019 Base Rate Case. See Note 3 under Environmental Remediation for additional information.
(i)
Comprised of several components including future generation costs, deferred nuclear outage costs, cancelled construction projects, building lease, and fuel-hedging losses. The timing of recovery of approximately $50 million for a future generation site is expected to be determined in the Georgia Power 2019 Base Rate Case. Nuclear outage costs are recorded and recovered or amortized over the outage cycles of each nuclear unit, which do not exceed 24 months . Approximately $30 million of costs associated with construction of environmental controls that will not be completed as a result of unit retirements are being amortized through 2022. The building lease is recorded and recovered or amortized through 2020. Fuel-hedging losses are recovered through Georgia Power's fuel cost recovery mechanism upon final settlement. See " Integrated Resource Plan " herein for additional information on future generation costs.
(j)
At December 31, 2018, approximately $55 million was accrued and outstanding for refund pursuant to the Georgia Power Tax Reform Settlement Agreement and approximately $100 million was accrued for refund, subject to review and approval by the Georgia PSC, as a result of the 2018 retail ROE exceeding the allowed retail ROE range. See " Rate Plans " herein for additional information.
(k)
Comprised of Demand-Side Management (DSM) tariff over recovery and fuel-hedging gains. The amortization of DSM tariff over recovery of $3 million at December 31, 2018 is expected to be determined in the Georgia Power 2019 Base Rate Case. Fuel-hedging gains are refunded through Georgia Power's fuel cost recovery mechanism upon final settlement. See " Rate Plans " herein for additional information on customer refunds and DSM tariffs.
(l)
Generally not earning a return as they are excluded from rate base or are offset in rate base by a corresponding asset or liability.

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Rate Plans
Pursuant to the terms and conditions of a settlement agreement related to Southern Company's acquisition of Southern Company Gas approved by the Georgia PSC in 2016, the 2013 ARP will continue in effect until December 31, 2019, and Georgia Power will be required to file its next base rate case by July 1, 2019. Furthermore, through December 31, 2019, Georgia Power will retain its merger savings, net of transition costs, as defined in the settlement agreement; through December 31, 2022, such net merger savings will be shared on a 60 / 40 basis with customers; thereafter, all merger savings will be retained by customers.
There were no changes to Georgia Power's traditional base tariff rates, Environmental Compliance Cost Recovery (ECCR) tariff, DSM tariffs, or Municipal Franchise Fee tariff in 2017 or 2018 .
Under the 2013 ARP, Georgia Power's retail ROE is set at 10.95% and earnings are evaluated against a retail ROE range of 10.00% to 12.00% . Two-thirds of any earnings above 12.00% will be directly refunded to customers, with the remaining one-third retained by Georgia Power. There will be no recovery of any earnings shortfall below 10.00% on an actual basis. In 2016, Georgia Power's retail ROE exceeded 12.00% , and Georgia Power refunded to retail customers in 2018 approximately $40 million as approved by the Georgia PSC. On February 5, 2019, the Georgia PSC approved a settlement between Georgia Power and the staff of the Georgia PSC under which Georgia Power's retail ROE for 2017 was stipulated to exceed 12.00% and Georgia Power will reduce certain regulatory assets by approximately $4 million in lieu of providing refunds to retail customers. In 2018, Georgia Power's retail ROE exceeded 12.00% , and Georgia Power accrued approximately $100 million to refund to retail customers, subject to review and approval by the Georgia PSC.
On April 3, 2018, the Georgia PSC approved the Georgia Power Tax Reform Settlement Agreement. Pursuant to the Georgia Power Tax Reform Settlement Agreement, to reflect the federal income tax rate reduction impact of the Tax Reform Legislation, Georgia Power will refund to customers a total of $330 million through bill credits. Georgia Power issued bill credits of approximately $130 million in 2018 and will issue bill credits of approximately $95 million in June 2019 and $105 million in February 2020. In addition, Georgia Power is deferring as a regulatory liability (i) the revenue equivalent of the tax expense reduction resulting from legislation lowering the Georgia state income tax rate from 6.00% to 5.75% in 2019 and (ii) the entire benefit of federal and state excess accumulated deferred income taxes, which is expected to total approximately $700 million at December 31, 2019. At December 31, 2018 , the related regulatory liability balance totaled $610 million . The amortization of these regulatory liabilities is expected to be addressed in the Georgia Power 2019 Base Rate Case. If there is not a base rate case in 2019, customers will receive $185 million in annual bill credits beginning in 2020, with any additional federal and state income tax savings deferred as a regulatory liability, until Georgia Power's next base rate case.
To address some of the negative cash flow and credit quality impacts of the Tax Reform Legislation, the Georgia PSC also approved an increase in Georgia Power's retail equity ratio to the lower of (i) Georgia Power's actual common equity weight in its capital structure or (ii) 55% , until the Georgia Power 2019 Base Rate Case. At December 31, 2018 , Georgia Power's actual retail common equity ratio (on a 13 -month average basis) was approximately 55% . Benefits from reduced federal income tax rates in excess of the amounts refunded to customers will be retained by Georgia Power to cover the carrying costs of the incremental equity in 2018 and 2019.
Integrated Resource Plan
In 2016, the Georgia PSC approved Georgia Power's triennial Integrated Resource Plan (2016 IRP) including the reclassification of the remaining net book value of Plant Mitchell Unit 3 and costs associated with materials and supplies remaining at the unit retirement date to a regulatory asset. Recovery of the unit's net book value will continue through December 31, 2019, as provided in the 2013 ARP. The timing of the recovery of the remaining balance of the unit's net book value as of December 31, 2019 and costs associated with materials and supplies remaining at the unit retirement date was deferred for consideration in the Georgia Power 2019 Base Rate Case.
In the 2016 IRP, the Georgia PSC also approved recovery of costs up to $99 million through June 30, 2019 to preserve nuclear generation as an option at a future generation site in Stewart County, Georgia. In March 2017, the Georgia PSC approved Georgia Power's decision to suspend work at the site due to changing economics, including lower load forecasts and fuel costs. The timing of recovery for costs incurred of approximately $50 million is expected to be determined by the Georgia PSC in the Georgia Power 2019 Base Rate Case.
On January 31, 2019, Georgia Power filed its triennial IRP (2019 IRP). The filing includes a request to decertify and retire Plant Hammond Units 1 through 4 ( 840 MWs) and Plant McIntosh Unit 1 ( 142.5 MWs) upon approval of the 2019 IRP .
In the 2019 IRP, Georgia Power requested approval to reclassify the remaining net book value of Plant Hammond Units 1 through 4 (approximately $520 million at December 31, 2018) upon retirement to a regulatory asset to be amortized ratably over a period equal to the applicable unit's remaining useful life through 2035. For Plant McIntosh Unit 1, Georgia Power requested approval to

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reclassify the remaining net book value (approximately $40 million at December 31, 2018) upon retirement to a regulatory asset to be amortized over a three -year period to be determined in the Georgia Power 2019 Base Rate Case. Georgia Power also requested approval to reclassify any unusable material and supplies inventory balances remaining at the applicable unit's retirement date to a regulatory asset for recovery over a period to be determined in the Georgia Power 2019 Base Rate Case.
The 2019 IRP also includes a request to certify approximately 25 MWs of capacity at Plant Scherer Unit 3 for the retail jurisdiction beginning January 1, 2020, following the expiration of a wholesale PPA.
The 2019 IRP also includes details regarding ARO costs associated with ash pond and landfill closures and post-closure care. Georgia Power requested the timing and rate of recovery of these costs be determined by the Georgia PSC in the Georgia Power 2019 Base Rate Case. See Note 6 for additional information regarding Georgia Power's AROs.
Georgia Power also requested approval to issue two capacity-based requests for proposals (RFP). If approved, the first capacity-based RFP will seek resources that can provide capacity beginning in 2022 or 2023 and the second capacity-based RFP will seek resources that can provide capacity beginning in 2026, 2027, or 2028. Additionally, the 2019 IRP includes a request to procure an additional 1,000 MWs of renewable resources through a competitive bidding process. Georgia Power also proposed to invest in a portfolio of up to 50 MWs of battery energy storage technologies.
A decision from the Georgia PSC on the 2019 IRP is expected in mid-2019.
The ultimate outcome of these matters cannot be determined at this time.
Fuel Cost Recovery
Georgia Power has established fuel cost recovery rates approved by the Georgia PSC. In 2016, the Georgia PSC approved Georgia Power's request to lower annual billings under an interim fuel rider by approximately $313 million effective June 1, 2016, which expired on December 31, 2017. On August 16, 2018, the Georgia PSC approved the deferral of Georgia Power's next fuel case to no later than March 16, 2020, with new rates, if any, to be effective June 1, 2020. Georgia Power continues to be allowed to adjust its fuel cost recovery rates under an interim fuel rider prior to the next fuel case if the under or over recovered fuel balance exceeds $200 million . Georgia Power's under recovered fuel balance totaled $115 million and $165 million at December 31, 2018 and 2017 , respectively, and is included in under recovered fuel clause revenues on Southern Company's and Georgia Power's balance sheets.
Georgia Power's fuel cost recovery mechanism includes costs associated with a natural gas hedging program, as revised and approved by the Georgia PSC, allowing the use of an array of derivative instruments within a 48 -month time horizon.
Fuel cost recovery revenues as recorded on the financial statements are adjusted for differences in actual recoverable fuel costs and amounts billed in current regulated rates. Accordingly, changes in the billing factor will not have a significant effect on Southern Company's or Georgia Power's revenues or net income, but will affect operating cash flows.
Storm Damage Recovery
Georgia Power defers and recovers certain costs related to damages from major storms as mandated by the Georgia PSC. Beginning January 1, 2014, Georgia Power is accruing $30 million annually under the 2013 ARP that is recoverable through base rates. At December 31, 2018 and 2017 , the balance in the regulatory asset related to storm damage was $416 million and $333 million , respectively, with $30 million included in other regulatory assets, current for each year and $386 million and $303 million included in other regulatory assets, deferred, respectively. During October 2018, Hurricane Michael caused significant damage to Georgia Power's transmission and distribution facilities. The incremental restoration costs related to this hurricane deferred in the regulatory asset for storm damage totaled approximately $115 million . Hurricanes Irma and Matthew also caused significant damage to Georgia Power's transmission and distribution facilities during September 2017 and October 2016, respectively. The incremental restoration costs related to Hurricanes Irma and Matthew deferred in the regulatory asset for storm damage totaled approximately $250 million . The rate of storm damage cost recovery is expected to be adjusted as part of the Georgia Power 2019 Base Rate Case and further adjusted in future regulatory proceedings as necessary. The ultimate outcome of this matter cannot be determined at this time.
Nuclear Construction
In 2009, the Georgia PSC certified construction of Plant Vogtle Units 3 and 4. Georgia Power holds a 45.7% ownership interest in Plant Vogtle Units 3 and 4. In 2012, the NRC issued the related combined construction and operating licenses, which allowed full construction of the two AP1000 nuclear units (with electric generating capacity of approximately 1,100 MWs each) and related facilities to begin. Until March 2017, construction on Plant Vogtle Units 3 and 4 continued under the Vogtle 3 and 4 Agreement,

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which was a substantially fixed price agreement. In March 2017, the EPC Contractor filed for bankruptcy protection under Chapter 11 of the U.S. Bankruptcy Code.
In connection with the EPC Contractor's bankruptcy filing, Georgia Power, acting for itself and as agent for the Vogtle Owners, entered into the Interim Assessment Agreement with the EPC Contractor to allow construction to continue. The Interim Assessment Agreement expired in July 2017 when Georgia Power, acting for itself and as agent for the other Vogtle Owners, and the EPC Contractor entered into the Vogtle Services Agreement. Under the Vogtle Services Agreement, Westinghouse provides facility design and engineering services, procurement and technical support, and staff augmentation on a time and materials cost basis. The Vogtle Services Agreement provides that it will continue until the start-up and testing of Plant Vogtle Units 3 and 4 are complete and electricity is generated and sold from both units. The Vogtle Services Agreement is terminable by the Vogtle Owners upon 30 days' written notice.
In October 2017, Georgia Power, acting for itself and as agent for the other Vogtle Owners, executed the Bechtel Agreement, a cost reimbursable plus fee arrangement, whereby Bechtel is reimbursed for actual costs plus a base fee and an at-risk fee, which is subject to adjustment based on Bechtel's performance against cost and schedule targets. Each Vogtle Owner is severally (not jointly) liable for its proportionate share, based on its ownership interest, of all amounts owed to Bechtel under the Bechtel Agreement. The Vogtle Owners may terminate the Bechtel Agreement at any time for their convenience, provided that the Vogtle Owners will be required to pay amounts related to work performed prior to the termination (including the applicable portion of the base fee), certain termination-related costs, and, at certain stages of the work, the applicable portion of the at-risk fee. Bechtel may terminate the Bechtel Agreement under certain circumstances, including certain Vogtle Owner suspensions of work, certain breaches of the Bechtel Agreement by the Vogtle Owners, Vogtle Owner insolvency, and certain other events. Pursuant to the Loan Guarantee Agreement between Georgia Power and the DOE, Georgia Power is required to obtain the DOE's approval of the Bechtel Agreement prior to obtaining any further advances under the Loan Guarantee Agreement.
Cost and Schedule
Georgia Power's approximate proportionate share of the remaining estimated capital cost to complete Plant Vogtle Units 3 and 4 by the expected in-service dates of November 2021 and November 2022, respectively, is as follows:

(in billions)
Base project capital cost forecast (a)(b)
$
8.0

Construction contingency estimate
0.4

Total project capital cost forecast (a)(b)
8.4

Net investment as of December 31, 2018 (b)
(4.6
)
Remaining estimate to complete (a)
$
3.8

(a)
Excludes financing costs expected to be capitalized through AFUDC of approximately $315 million .
(b)
Net of $1.7 billion received from Toshiba under the Guarantee Settlement Agreement and approximately $188 million in related Customer Refunds.
Georgia Power estimates that its financing costs for construction of Plant Vogtle Units 3 and 4 will total approximately $3.1 billion , of which $1.9 billion had been incurred through December 31, 2018 .
As construction continues, challenges with management of contractors, subcontractors, and vendors; labor productivity, availability, and/or cost escalation; procurement, fabrication, delivery, assembly, and/or installation and testing, including any required engineering changes, of plant systems, structures, and components (some of which are based on new technology that only recently began initial operation in the global nuclear industry at this scale); or other issues could arise and change the projected schedule and estimated cost. Monthly construction production targets required to maintain the current project schedule will continue to increase significantly throughout 2019. To meet these increasing monthly targets, existing craft construction productivity must improve and additional craft laborers must be retained and deployed.
Georgia Power and Southern Nuclear believe it is a leading practice in connection with a construction project of this size and complexity to periodically validate recent construction progress in comparison to the projected schedule and to verify and update quantities of commodities remaining to install, labor productivity, and forecasted staffing needs. This verification process, led by Southern Nuclear, was underway as of December 31, 2018 and is expected to be completed during the second quarter 2019. Georgia Power currently does not anticipate any material changes to the total estimated project capital cost forecast for Plant Vogtle Units 3 and 4 or the expected in-service dates of November 2021 and November 2022, respectively, resulting from this verification process. However, the ultimate impact on cost and schedule, if any, will not be known until the verification process is completed. Georgia Power is required to report the results and any project impacts to the Georgia PSC by May 15, 2019.

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There have been technical and procedural challenges to the construction and licensing of Plant Vogtle Units 3 and 4 at the federal and state level and additional challenges may arise. Processes are in place that are designed to assure compliance with the requirements specified in the Westinghouse Design Control Document and the combined construction and operating licenses, including inspections by Southern Nuclear and the NRC that occur throughout construction. As a result of such compliance processes, certain license amendment requests have been filed and approved or are pending before the NRC. Various design and other licensing-based compliance matters, including the timely resolution of ITAAC and the related approvals by the NRC, may arise, which may result in additional license amendments or require other resolution. If any license amendment requests or other licensing-based compliance issues are not resolved in a timely manner, there may be delays in the project schedule that could result in increased costs.
The ultimate outcome of these matters cannot be determined at this time. However, any extension of the project schedule is currently estimated to result in additional base capital costs of approximately $50 million per month, based on Georgia Power's ownership interests, and AFUDC of approximately $12 million per month. While Georgia Power is not precluded from seeking recovery of any future capital cost forecast increase, management will ultimately determine whether or not to seek recovery. Any further changes to the capital cost forecast that are not expected to be recoverable through regulated rates will be required to be charged to income and such charges could be material.
Joint Owner Contracts
In November 2017, the Vogtle Owners entered into an amendment to their joint ownership agreements for Plant Vogtle Units 3 and 4 to provide for, among other conditions, additional Vogtle Owner approval requirements. Effective August 31, 2018, the Vogtle Owners further amended the joint ownership agreements to clarify and provide procedures for certain provisions of the joint ownership agreements related to adverse events that require the vote of the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 to continue construction (as amended, and together with the November 2017 amendment, the Vogtle Joint Ownership Agreements). The Vogtle Joint Ownership Agreements also confirm that the Vogtle Owners' sole recourse against Georgia Power or Southern Nuclear for any action or inaction in connection with their performance as agent for the Vogtle Owners is limited to removal of Georgia Power and/or Southern Nuclear as agent, except in cases of willful misconduct.
As a result of the increase in the total project capital cost forecast and Georgia Power's decision not to seek rate recovery of the increase in the base capital costs as described below, the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 were required to vote to continue construction. On September 26, 2018, the Vogtle Owners unanimously voted to continue construction of Plant Vogtle Units 3 and 4.
Amendments to the Vogtle Joint Ownership Agreements
In connection with the vote to continue construction, Georgia Power entered into (i) a binding term sheet (Vogtle Owner Term Sheet) with the other Vogtle Owners and MEAG's wholly-owned subsidiaries MEAG Power SPVJ, LLC (MEAG SPVJ), MEAG Power SPVM, LLC (MEAG SPVM), and MEAG Power SPVP, LLC (MEAG SPVP) to take certain actions which partially mitigate potential financial exposure for the other Vogtle Owners, including additional amendments to the Vogtle Joint Ownership Agreements and the purchase of PTCs from the other Vogtle Owners, and (ii) a term sheet (MEAG Term Sheet) with MEAG and MEAG SPVJ to provide funding with respect to MEAG SPVJ's ownership interest in Plant Vogtle Units 3 and 4 (Project J) under certain circumstances. On January 14, 2019, Georgia Power, MEAG, and MEAG SPVJ entered into an agreement to implement the provisions of the MEAG Term Sheet (MEAG Funding Agreement). On February 18, 2019, Georgia Power, the other Vogtle Owners, and MEAG's wholly-owned subsidiaries MEAG SPVJ, MEAG SPVM, and MEAG SPVP entered into certain amendments to the Vogtle Joint Ownership Agreements to implement the provisions of the Vogtle Owner Term Sheet (Global Amendments).
Pursuant to the Global Amendments, and consistent with the Vogtle Owner Term Sheet, the Vogtle Joint Ownership Agreements were modified as follows: (i) each Vogtle Owner must pay its proportionate share of qualifying construction costs for Plant Vogtle Units 3 and 4 based on its ownership percentage up to the estimated cost at completion (EAC) for Plant Vogtle Units 3 and 4 which formed the basis of Georgia Power's forecast of $8.4 billion in the nineteenth VCM plus $800 million ; (ii) Georgia Power will be responsible for 55.7% of actual qualifying construction costs between $800 million and $1.6 billion over the EAC in the nineteenth VCM (resulting in $80 million of potential additional costs to Georgia Power), with the remaining Vogtle Owners responsible for 44.3% of such costs pro rata in accordance with their respective ownership interests; and (iii) Georgia Power will be responsible for 65.7% of qualifying construction costs between $1.6 billion and $2.1 billion over the EAC in the nineteenth VCM (resulting in a further $100 million of potential additional costs to Georgia Power), with the remaining Vogtle Owners responsible for 34.3% of such costs pro rata in accordance with their respective ownership interests.
If the EAC is revised and exceeds the EAC in the nineteenth VCM by more than $2.1 billion , each of the other Vogtle Owners will have a one-time option at the time the project budget forecast is so revised to tender a portion of its ownership interest to

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Georgia Power in exchange for Georgia Power's agreement to pay 100% of such Vogtle Owner's remaining share of total construction costs in excess of the EAC in the nineteenth VCM plus $2.1 billion . In this event, Georgia Power will have the option of cancelling the project in lieu of purchasing a portion of the ownership interest of any other Vogtle Owner. If Georgia Power accepts the offer to purchase a portion of another Vogtle Owner's ownership interest in Plant Vogtle Units 3 and 4, the ownership interest(s) to be conveyed from the tendering Vogtle Owner(s) to Georgia Power will be calculated based on the proportion of the cumulative amount of construction costs paid by each such tendering Vogtle Owner(s) and by Georgia Power as of the COD of Plant Vogtle Unit 4. For purposes of this calculation, payments made by Georgia Power on behalf of another Vogtle Owner in accordance with the second and third items described in the paragraph above will be treated as payments made by the applicable Vogtle Owner.
In the event the actual costs of construction at completion of a Unit are less than the EAC reflected in the nineteenth VCM report and such Unit is placed in service in accordance with the schedule projected in the nineteenth VCM report (i.e., Plant Vogtle Unit 3 is placed in service by November 2021 or Plant Vogtle Unit 4 is placed in service by November 2022), Georgia Power will be entitled to 60.7% of the cost savings with respect to the relevant Unit and the remaining Vogtle Owners will be entitled to 39.3% of such savings on a pro rata basis in accordance with their respective ownership interests.
For purposes of the foregoing provisions, qualifying construction costs will not include costs (i) resulting from force majeure events, including governmental actions or inactions (or significant delays associated with issuance of such actions) that affect the licensing, completion, start-up, operations, or financing of Plant Vogtle Units 3 and 4, administrative proceedings or litigation regarding ITAAC or other regulatory challenges to commencement of operation of Plant Vogtle Units 3 and 4, and changes in laws or regulations governing Plant Vogtle Units 3 and 4, (ii) legal fees and legal expenses incurred due to litigation with contractors or subcontractors that are not subsidiaries or affiliates of Southern Company, and (iii) additional costs caused by requests from the Vogtle Owners other than Georgia Power, except for the exercise of a right to vote granted under the Vogtle Joint Ownership Agreements, that increase costs by $100,000 or more.
Pursuant to the Global Amendments, and consistent with the Vogtle Owner Term Sheet, the provisions of the Vogtle Joint Ownership Agreements requiring that Vogtle Owners holding 90% of the ownership interests in Plant Vogtle Units 3 and 4 vote to continue construction following certain adverse events (Project Adverse Events) were modified. Pursuant to the Global Amendments, the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 must vote to continue construction if certain Project Adverse Events occur, including: (i) the bankruptcy of Toshiba; (ii) the termination or rejection in bankruptcy of certain agreements, including the Vogtle Services Agreement, the Bechtel Agreement, or the agency agreement with Southern Nuclear; (iii) Georgia Power publicly announces its intention not to submit for rate recovery any portion of its investment in Plant Vogtle Units 3 and 4 or the Georgia PSC determines that any of Georgia Power's costs relating to the construction of Plant Vogtle Units 3 and 4 will not be recovered in retail rates, excluding any additional amounts paid by Georgia Power on behalf of the other Vogtle Owners pursuant to the Global Amendments described above and the first 6% of costs during any six -month VCM reporting period that are disallowed by the Georgia PSC for recovery, or for which Georgia Power elects not to seek cost recovery, through retail rates; and (iv) an incremental extension of one year or more over the most recently approved schedule. Under the Global Amendments, Georgia Power may cancel the project at any time in its sole discretion.
In addition, pursuant to the Vogtle Joint Ownership Agreements, the required approval of holders of ownership interests in Plant Vogtle Units 3 and 4 is at least (i) 90% for a change of the primary construction contractor and (ii) 67% for material amendments to the Vogtle Services Agreement or agreements with Southern Nuclear or the primary construction contractor, including the Bechtel Agreement.
The Global Amendments provide that if the holders of at least 90% of the ownership interests fail to vote in favor of continuing the project following any future Project Adverse Event, work on Plant Vogtle Units 3 and 4 will continue for a period of 30 days if the holders of more than 50% of the ownership interests vote in favor of continuing construction (Majority Voting Owners). In such a case, the Vogtle Owners (i) have agreed to negotiate in good faith towards the resumption of the project, (ii) if no agreement is reached during such 30 -day period, the project will be cancelled, and (iii) in the event of such a cancellation, the Majority Voting Owners will be obligated to reimburse any other Vogtle Owner for the incremental costs it incurred during such 30 -day negotiation period.
Purchase of PTCs During Commercial Operation
Pursuant to the Global Amendments, and consistent with the Vogtle Owner Term Sheet, Georgia Power has agreed to purchase additional PTCs from OPC, Dalton, MEAG SPVM, MEAG SPVP, and MEAG SPVJ (to the extent any MEAG SPVJ PTC rights remain after any purchases required under the MEAG Funding Agreement as described below) at varying purchase prices dependent upon the actual cost to complete construction of Plant Vogtle Units 3 and 4 as compared to the EAC reflected in the nineteenth VCM report. The purchases are at the option of the applicable Vogtle Owner.

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Potential Funding to MEAG Project J
Pursuant to the MEAG Funding Agreement, and consistent with the MEAG Term Sheet, if MEAG SPVJ is unable to make its payments due under the Vogtle Joint Ownership Agreements solely as a result of the occurrence of one of the following situations that materially impedes access to capital markets for MEAG for Project J: (i) the conduct of JEA or the City of Jacksonville, such as JEA's legal challenges of its obligations under a PPA with MEAG (PPA-J), or (ii) PPA-J is declared void by a court of competent jurisdiction or rejected by JEA under the applicable provisions of the U.S. Bankruptcy Code (each of (i) and (ii), a JEA Default), at MEAG's request, Georgia Power will purchase from MEAG SPVJ the rights to PTCs attributable to MEAG SPVJ's share of Plant Vogtle Units 3 and 4 (approximately 206 MWs) within 30 days of such request at varying prices dependent upon the stage of construction of Plant Vogtle Units 3 and 4. The aggregate purchase price of the PTCs, together with any advances made as described in the next paragraph, shall not exceed $300 million .
At the option of MEAG, as an alternative or supplement to Georgia Power's purchase of PTCs as described above, Georgia Power has agreed to provide up to $250 million in funding to MEAG for Project J in the form of advances (either advances under the Vogtle Joint Ownership Agreements or the purchase of MEAG Project J bonds, at the discretion of Georgia Power), subject to any required approvals of the Georgia PSC and the DOE.
In the event MEAG SPVJ certifies to Georgia Power that it is unable to fund its obligations under the Vogtle Joint Ownership Agreements as a result of a JEA Default and Georgia Power becomes obligated to provide funding as described above, MEAG is required to (i) assign to Georgia Power its right to vote on any future Project Adverse Event and (ii) diligently pursue JEA for its breach of PPA-J. In addition, Georgia Power agreed that it will not sue MEAG for any amounts due from MEAG SPVJ under MEAG's guarantee of MEAG SPVJ's obligations so long as MEAG SPVJ complies with the terms of the MEAG Funding Agreement as to its payment obligations and the other non-payment provisions of the Vogtle Joint Ownership Agreements.
Under the terms of the MEAG Funding Agreement, Georgia Power may cancel the project in lieu of providing funding in the form of advances or PTC purchases.
The ultimate outcome of these matters cannot be determined at this time.
Regulatory Matters
In 2009, the Georgia PSC voted to certify construction of Plant Vogtle Units 3 and 4 with a certified capital cost of $4.418 billion . In addition, in 2009 the Georgia PSC approved inclusion of the Plant Vogtle Units 3 and 4 related CWIP accounts in rate base, and the State of Georgia enacted the Georgia Nuclear Energy Financing Act, which allows Georgia Power to recover financing costs for Plant Vogtle Units 3 and 4. Financing costs are recovered on all applicable certified costs through annual adjustments to the NCCR tariff up to the certified capital cost of $4.418 billion . At December 31, 2018 , Georgia Power had recovered approximately $1.9 billion of financing costs. Financing costs related to capital costs above $4.418 billion will be recovered through AFUDC; however, Georgia Power will not record AFUDC related to any capital costs in excess of the total deemed reasonable by the Georgia PSC (currently $7.3 billion ) and not requested for rate recovery. On December 18, 2018, the Georgia PSC approved Georgia Power's request to increase the NCCR tariff by $88 million annually, effective January 1, 2019.
Georgia Power is required to file semi-annual VCM reports with the Georgia PSC by February 28 and August 31 of each year. In 2013, in connection with the eighth VCM report, the Georgia PSC approved a stipulation between Georgia Power and the staff of the Georgia PSC to waive the requirement to amend the Plant Vogtle Units 3 and 4 certificate in accordance with the 2009 certification order until the completion of Plant Vogtle Unit 3, or earlier if deemed appropriate by the Georgia PSC and Georgia Power.
In 2016, the Georgia PSC voted to approve a settlement agreement (Vogtle Cost Settlement Agreement) resolving certain prudency matters in connection with the fifteenth VCM report. In December 2017, the Georgia PSC voted to approve (and issued its related order on January 11, 2018) Georgia Power's seventeenth VCM report, which included a recommendation to continue construction with Southern Nuclear as project manager and Bechtel serving as the primary construction contractor, and modified the Vogtle Cost Settlement Agreement. The Vogtle Cost Settlement Agreement, as modified by the January 11, 2018 order, resolved the following regulatory matters related to Plant Vogtle Units 3 and 4: (i) none of the $3.3 billion of costs incurred through December 31, 2015 and reflected in the fourteenth VCM report should be disallowed from rate base on the basis of imprudence; (ii) the Contractor Settlement Agreement was reasonable and prudent and none of the amounts paid pursuant to the Contractor Settlement Agreement should be disallowed from rate base on the basis of imprudence; (iii) (a) capital costs incurred up to $5.68 billion would be presumed to be reasonable and prudent with the burden of proof on any party challenging such costs, (b) Georgia Power would have the burden to show that any capital costs above $5.68 billion were prudent, and (c) a revised capital cost forecast of $7.3 billion (after reflecting the impact of payments received under the Guarantee Settlement Agreement and related Customer Refunds) was found reasonable; (iv) construction of Plant Vogtle Units 3 and 4 should be completed, with Southern Nuclear serving as project manager and Bechtel as primary contractor; (v) approved and deemed reasonable Georgia

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Power's revised schedule placing Plant Vogtle Units 3 and 4 in service in November 2021 and November 2022, respectively; (vi) confirmed that the revised cost forecast does not represent a cost cap and that prudence decisions on cost recovery will be made at a later date, consistent with applicable Georgia law; (vii) reduced the ROE used to calculate the NCCR tariff (a) from 10.95% (the ROE rate setting point authorized by the Georgia PSC in the 2013 ARP) to 10.00% effective January 1, 2016, (b) from 10.00% to 8.30% , effective January 1, 2020, and (c) from 8.30% to 5.30% , effective January 1, 2021 (provided that the ROE in no case will be less than Georgia Power's average cost of long-term debt); (viii) reduced the ROE used for AFUDC equity for Plant Vogtle Units 3 and 4 from 10.00% to Georgia Power's average cost of long-term debt, effective January 1, 2018; and (ix) agreed that upon Unit 3 reaching commercial operation, retail base rates would be adjusted to include carrying costs on those capital costs deemed prudent in the Vogtle Cost Settlement Agreement. The January 11, 2018 order also stated that if Plant Vogtle Units 3 and 4 are not commercially operational by June 1, 2021 and June 1, 2022, respectively, the ROE used to calculate the NCCR tariff will be further reduced by 10 basis points each month (but not lower than Georgia Power's average cost of long-term debt) until the respective Unit is commercially operational. The ROE reductions negatively impacted earnings by approximately $100 million , $25 million , and $20 million in 2018, 2017, and 2016, respectively, and are estimated to have negative earnings impacts of approximately $75 million in 2019 and an aggregate of approximately $615 million from 2020 to 2022.
In its January 11, 2018 order, the Georgia PSC also stated if other conditions change and assumptions upon which Georgia Power's seventeenth VCM report are based do not materialize, the Georgia PSC reserved the right to reconsider the decision to continue construction.
On February 12, 2018, Georgia Interfaith Power & Light, Inc. (GIPL) and Partnership for Southern Equity, Inc. (PSE) filed a petition appealing the Georgia PSC's January 11, 2018 order with the Fulton County Superior Court. On March 8, 2018, Georgia Watch filed a similar appeal to the Fulton County Superior Court for judicial review of the Georgia PSC's decision and denial of Georgia Watch's motion for reconsideration. On December 21, 2018, the Fulton County Superior Court granted Georgia Power's motion to dismiss the two appeals. On January 9, 2019, GIPL, PSE, and Georgia Watch filed an appeal of this decision with the Georgia Court of Appeals. Georgia Power believes the appeal has no merit; however, an adverse outcome in the appeal combined with subsequent adverse action by the Georgia PSC could have a material impact on Southern Company's and Georgia Power's results of operations, financial condition, and liquidity.
In preparation for its nineteenth VCM filing, Georgia Power requested Southern Nuclear to perform a full cost reforecast for the project. This reforecast, performed prior to the nineteenth VCM filing, resulted in a $0.7 billion increase to the base capital cost forecast reported in the second quarter 2018. This base cost increase primarily resulted from changed assumptions related to the finalization of contract scopes and management responsibilities for Bechtel and over 60 subcontractors, labor productivity rates, and craft labor incentives, as well as the related levels of project management, oversight, and support, including field supervision and engineering support.
Although Georgia Power believes these incremental costs are reasonable and necessary to complete the project and the Georgia PSC's order in the seventeenth VCM proceeding specifically states that the construction of Plant Vogtle Units 3 and 4 is not subject to a cost cap, Georgia Power did not seek rate recovery for these cost increases included in the current base capital cost forecast (or any related financing costs) in the nineteenth VCM report. In connection with future VCM filings, Georgia Power may request the Georgia PSC to evaluate costs currently included in the construction contingency estimate for rate recovery as and when they are appropriately included in the base capital cost forecast. After considering the significant level of uncertainty that exists regarding the future recoverability of costs included in the construction contingency estimate since the ultimate outcome of these matters is subject to the outcome of future assessments by management, as well as Georgia PSC decisions in these future regulatory proceedings, Georgia Power recorded a total pre-tax charge to income of $1.1 billion ( $0.8 billion after tax) in the second quarter 2018, which includes the total increase in the base capital cost forecast and construction contingency estimate.
On August 31, 2018, Georgia Power filed its nineteenth VCM report with the Georgia PSC, which requested approval of $578 million of construction capital costs incurred from January 1, 2018 through June 30, 2018. On February 19, 2019, the Georgia PSC approved the nineteenth VCM, but deferred approval of $51.6 million of expenditures related to Georgia Power's portion of an administrative claim filed in the Westinghouse bankruptcy proceedings. Through the nineteenth VCM, the Georgia PSC has approved total construction capital costs incurred through June 30, 2018 of $5.4 billion (before $1.7 billion of payments received under the Guarantee Settlement Agreement and approximately $188 million in related Customer Refunds). In addition, the staff of the Georgia PSC requested, and Georgia Power agreed, to file its twentieth VCM report concurrently with the twenty-first VCM report by August 31, 2019.
The ultimate outcome of these matters cannot be determined at this time.

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DOE Financing
At December 31, 2018 , Georgia Power had borrowed $2.6 billion related to Plant Vogtle Units 3 and 4 costs through the Loan Guarantee Agreement and a multi-advance credit facility among Georgia Power, the DOE, and the FFB, which provides for borrowings of up to $3.46 billion , subject to the satisfaction of certain conditions. In September 2017, the DOE issued a conditional commitment to Georgia Power for up to approximately $1.67 billion in additional guaranteed loans under the Loan Guarantee Agreement. In September 2018, the DOE extended the conditional commitment to March 31, 2019 . Any further extension must be approved by the DOE. Final approval and issuance of these additional loan guarantees by the DOE cannot be assured and are subject to the negotiation of definitive agreements, completion of due diligence by the DOE, receipt of any necessary regulatory approvals, and satisfaction of other conditions. See Note 8 under " Long-term Debt DOE Loan Guarantee Borrowings " for additional information, including applicable covenants, events of default, mandatory prepayment events (including any decision not to continue construction of Plant Vogtle Units 3 and 4), and conditions to borrowing.
The ultimate outcome of these matters cannot be determined at this time.

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Mississippi Power
Regulatory Assets and Liabilities
Regulatory assets and (liabilities) reflected in the balance sheets of Mississippi Power at December 31, 2018 and 2017 relate to:
 
2018
 
2017
 
Note
 
(in millions)
Retiree benefit plans – regulatory assets
$
171

 
$
174

 
(a)
Asset retirement obligations
143

 
95

 
(b)
Kemper County energy facility assets, net
69

 
88

 
(c)
Remaining net book value of retired assets
41

 
44

 
(d)
Property tax
44

 
43

 
(e)
Deferred charges related to income taxes
34

 
36

 
(b)
Plant Daniel Units 3 and 4
36

 
36

 
(f)
ECO carryforward
26

 
26

 
(g)
Other regulatory assets
28

 
28

 
(h)
Deferred credits related to income taxes
(377
)
 
(377
)
 
(i)
Other cost of removal obligations
(185
)
 
(178
)
 
(b)
Property damage
(56
)
 
(57
)
 
(j)
Other regulatory liabilities
(9
)
 

 
(k)
Total regulatory assets (liabilities), net
$
(35
)
 
$
(42
)
 
 
Note: Unless otherwise noted, the recovery and amortization periods for these regulatory assets and (liabilities) are approved by the Mississippi PSC and are as follows:
(a)
Recovered and amortized over the average remaining service period which may range up to 15 years . See Note 11 for additional information.
(b)
Asset retirement and other cost of removal obligations and deferred charges related to income taxes are generally recovered over the related property lives, which may range up to 48 years . Asset retirement and other cost of removal obligations will be settled and trued up upon completion of removal activities over a period to be determined by the Mississippi PSC.
(c)
Includes $91 million of regulatory assets and $22 million of regulatory liabilities. The retail portion includes $75 million of regulatory assets and $22 million of regulatory liabilities that are being recovered in rates over an eight -year period through 2025 and a six -year period through 2023, respectively. Recovery of the wholesale portion of the regulatory assets in the amount of $16 million is expected to be determined in a settlement agreement with wholesale customers in 2019. For additional information, see " Kemper County Energy Facility – Rate Recovery – Kemper Settlement Agreement" herein.
(d)
Retail portion includes approximately $26 million being recovered over a five -year period through 2021 and 2022 for Plant Watson and Plant Greene County, respectively. Recovery of the wholesale portion of approximately $15 million is expected to be determined in a settlement agreement with wholesale customers in 2019.
(e)
Recovered through the ad valorem tax adjustment clause over a 12 -month period beginning in April of the following year. See " Ad Valorem Tax Adjustment " herein for additional information.
(f)
Represents the difference between the revenue requirement under the purchase option and the revenue requirement assuming operating lease accounting treatment for the extended term, which will be amortized over a 10 -year period beginning October 2021.
(g)
Generally recovered through the ECO Plan clause in the year following the deferral. See "Environmental Compliance Plan" herein.
(h)
Comprised of $9 million related to vacation pay, $8 million related to loss on reacquired debt, and other miscellaneous assets. These costs are recorded and recovered or amortized over periods which may range up to 50 years. This amount also includes fuel-hedging assets which are recorded over the life of the underlying hedged purchase contracts, which generally do not exceed three years . Upon final settlement, actual costs incurred are recovered through the ECM.
(i)
Includes excess deferred income taxes primarily associated with Tax Reform Legislation of $377 million , of which $266 million is related to protected deferred income taxes to be recovered over the related property lives utilizing the average rate assumption method in accordance with IRS normalization principles and $111 million related to unprotected (not subject to normalization). The unprotected portion associated with the Kemper County energy facility is $46 million , of which $33 million is being amortized over eight years through 2025 for retail and the amortization of $15 million is expected to be determined in a settlement agreement with wholesale customers in 2019. Mississippi Power also has $9 million of excess deferred income tax benefits associated with the System Restoration Rider being amortized over an eight -year period through 2025. Amortization of the remaining portions of the unprotected deferred income taxes associated with the Tax Reform Legislation are expected to be determined in Mississippi Power's next base rate proceeding, which is scheduled to be filed in the fourth quarter 2019 (Mississippi Power 2019 Base Rate Case). See " Kemper County Energy Facility " and "FERC Matters – Mississippi Power – Municipal and Rural Associations Tariff" herein and Note 10 for additional information.
(j)
For additional information, see " System Restoration Rider " herein.
(k)
Comprised of numerous immaterial components including deferred income tax credits and other miscellaneous liabilities that are recorded and refunded or amortized generally over periods not exceeding one year .

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Operations Review
In August 2018, the Mississippi PSC began an operations review of Mississippi Power, for which the final report is expected prior to the conclusion of the Mississippi Power 2019 Base Rate Case. Mississippi Power expects that the review will include, but not be limited to, a comparative analysis of its costs, its cost recovery framework, and ways in which it may streamline management operations for the reasonable benefit of ratepayers. The ultimate outcome of this matter cannot be determined at this time.
Performance Evaluation Plan
Mississippi Power's retail base rates generally are set under the PEP, a rate plan approved by the Mississippi PSC. Two filings are made for each calendar year: the PEP projected filing, which is typically filed prior to the beginning of the year based on a projected revenue requirement, and the PEP lookback filing, which is filed after the end of the year and allows for review of the actual revenue requirement compared to the projected filing.
In 2011, Mississippi Power submitted its annual PEP lookback filing for 2010, which recommended no surcharge or refund. Later in 2011, the MPUS disputed certain items in the 2010 PEP lookback filing. In 2012, the Mississippi PSC issued an order canceling Mississippi Power's PEP lookback filing for 2011. I n 2013, the MPUS contested Mississippi Power's PEP lookback filing for 2012, which indicated a refund due to customers of $5 million . In 2014 through 2018, Mississippi Power submitted its annual PEP lookback filings for the prior years, which for each of 2013, 2014, and 2017 indicated no surcharge or refund and for each of 2015 and 2016 indicated a $5 million surcharge. Additionally, in July 2016, in November 2016, and in November 2017, Mississippi Power submitted its annual projected PEP filings for 2016, 2017, and 2018, respectively, which for 2016 and 2017 indicated no change in rates and for 2018 indicated a rate increase of 4% , or $38 million in annual revenues. The Mississippi PSC suspended each of these filings to allow more time for review.
On February 7, 2018, Mississippi Power revised its annual projected PEP filing for 2018 to reflect the impacts of the Tax Reform Legislation. The revised filing requested an increase of $26 million in annual revenues, based on a performance adjusted ROE of 9.33% and an increased equity ratio of 55% . On July 27, 2018, Mississippi Power and the MPUS entered into a settlement agreement, which was approved by the Mississippi PSC on August 7, 2018, with respect to the 2018 PEP filing and all unresolved PEP filings for prior years (PEP Settlement Agreement). Rates under the PEP Settlement Agreement became effective with the first billing cycle of September 2018. The PEP Settlement Agreement provides for an increase of approximately $21.6 million in annual base retail revenues, which excludes certain compensation costs contested by the MPUS, as well as approximately $2 million which was subsequently approved for recovery through the 2018 Energy Efficiency Cost Rider as discussed below. Under the PEP Settlement Agreement, Mississippi Power is deferring the contested compensation costs for 2018 and 2019 as a regulatory asset, which totaled $4 million as of December 31, 2018 and is included in other regulatory assets, deferred on the balance sheet. The Mississippi PSC is currently expected to rule on the appropriate treatment for such costs in connection with the Mississippi Power 2019 Base Rate Case. The ultimate outcome of this matter cannot be determined at this time.
Pursuant to the PEP Settlement Agreement, Mississippi Power's performance-adjusted allowed ROE is 9.31% and its allowed equity ratio is capped at 51% , pending further review by the Mississippi PSC. In lieu of the requested equity ratio increase, Mississippi Power retained $44 million of excess accumulated deferred income taxes resulting from the Tax Reform Legislation until the conclusion of the Mississippi Power 2019 Base Rate Case. Further, Mississippi Power agreed to seek equity contributions sufficient to restore its equity ratio to 50% by December 31, 2018. Since Mississippi Power's actual average equity ratio for 2018 was more than 1% lower than the 50% target, Mississippi Power deferred the corresponding difference in its revenue requirement of approximately $4 million as a regulatory liability for resolution in the Mississippi Power 2019 Base Rate Case. Pursuant to the PEP Settlement Agreement, PEP proceedings are suspended until after the conclusion of the Mississippi Power 2019 Base Rate Case and Mississippi Power is not required to make any PEP filings for regulatory years 2018, 2019, and 2020. The PEP Settlement Agreement also resolved all open PEP filings with no change to customer rates. As a result, in the third quarter 2018, Mississippi Power recognized revenues of $5 million previously reserved in connection with the 2012 PEP lookback filing.
Energy Efficiency
In 2013, the Mississippi PSC approved an energy efficiency and conservation rule requiring electric and gas utilities in Mississippi serving more than 25,000 customers to implement energy efficiency programs and standards. Quick Start Plans, which include a portfolio of energy efficiency programs that are intended to provide benefits to a majority of customers, were extended by an order issued by the Mississippi PSC in July 2016, until the time the Mississippi PSC approves a comprehensive portfolio plan program. The ultimate outcome of this matter cannot be determined at this time.

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On May 8, 2018, the Mississippi PSC issued an order approving Mississippi Power's revised annual projected Energy Efficiency Cost Rider 2018 compliance filing, which increased annual retail revenues by approximately $3 million effective with the first billing cycle for June 2018.
On February 5, 2019, the Mississippi PSC issued an order approving Mississippi Power's Energy Efficiency Cost Rider 2019 compliance filing, which included a slight decrease in annual retail revenues, effective with the first billing cycle in March 2019.
Environmental Compliance Overview Plan
In accordance with a 2011 accounting order from the Mississippi PSC, Mississippi Power has the authority to defer in a regulatory asset for future recovery all plant retirement- or partial retirement-related costs resulting from environmental regulations. The Mississippi PSC approved $41 million and $17 million of costs that were reclassified to regulatory assets associated with the fuel conversion of Plant Watson and Plant Greene County, respectively, for amortization over five -year periods that began in July 2016 and July 2017, respectively. As a result, these decisions are not expected to have a material impact on Mississippi Power's financial statements.
In August 2016, the Mississippi PSC approved Mississippi Power's revised ECO Plan filing for 2016, which requested the maximum 2% annual increase in revenues, or approximately $18 million , primarily related to the Plant Daniel Units 1 and 2 scrubbers placed in service in 2015. The revised rates became effective with the first billing cycle for September 2016. Approximately $22 million of related revenue requirements in excess of the 2% maximum was deferred for inclusion in the 2017 filing, along with related carrying costs.
In May 2017, the Mississippi PSC approved Mississippi Power's ECO Plan filing for 2017, which requested the maximum 2% annual increase in revenues, or approximately $18 million , primarily related to the carryforward from the prior year. The rates became effective with the first billing cycle for June 2017. Approximately $26 million , plus carrying costs, of related revenue requirements in excess of the 2% maximum was deferred for inclusion in the 2018 filing.
On February 14, 2018, Mississippi Power submitted its ECO Plan filing for 2018, including the effects of the Tax Reform Legislation, which requested the maximum 2% annual increase in revenues, or approximately $17 million , primarily related to the carryforward from the prior year.
On August 3, 2018, Mississippi Power and the MPUS entered into the ECO Settlement Agreement, which provides for an increase of approximately $17 million in annual base retail revenues and was approved by the Mississippi PSC on August 7, 2018. Rates under the ECO Settlement Agreement became effective with the first billing cycle of September 2018 and will continue in effect until modified by the Mississippi PSC. These revenues are expected to be sufficient to recover the costs included in Mississippi Power's request for 2018, as well as the remaining deferred amounts, totaling $26 million at December 31, 2018, along with the related carrying costs. In accordance with the ECO Settlement Agreement, ECO Plan proceedings are suspended until after the conclusion of the Mississippi Power 2019 Base Rate Case and Mississippi Power is not required to make any ECO Plan filings for 2018, 2019, and 2020, with any necessary adjustments to be reflected in the Mississippi Power 2019 Base Rate Case. The ECO Settlement Agreement contains the same terms as the PEP Settlement Agreement described herein with respect to allowed ROE and equity ratio. At December 31, 2018, Mississippi Power has recorded $2 million in other regulatory liabilities, deferred on the balance sheet related to the actual December 31, 2018 average equity ratio differential from target applicable to the ECO Plan.
Fuel Cost Recovery
Mississippi Power establishes, annually, a retail fuel cost recovery factor that is approved by the Mississippi PSC. Mississippi Power is required to file for an adjustment to the retail fuel cost recovery factor annually. In January 2017, the Mississippi PSC approved the 2017 retail fuel cost recovery factor, effective February 2017 through January 2018, which resulted in an annual revenue increase of $55 million . On January 16, 2018, the Mississippi PSC approved the 2018 retail fuel cost recovery factor, effective February 2018 through January 2019, which resulted in an annual revenue increase of $39 million . At December 31, 2018, the amount of over recovered retail fuel costs included in the balance sheet in other accounts payable was approximately $8 million compared to $6 million under recovered at December 31, 2017. On January 10, 2019, the Mississippi PSC approved the 2019 retail fuel cost recovery factor, effective February 2019, which results in a $35 million decrease in annual revenues as a result of lower expected fuel costs.
Mississippi Power's operating revenues are adjusted for differences in actual recoverable fuel cost and amounts billed in accordance with the currently approved cost recovery rate. Accordingly, changes in the billing factor should have no significant effect on Southern Company's or Mississippi Power's revenues or net income but will affect operating cash flows.

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Ad Valorem Tax Adjustment
Mississippi Power establishes annually an ad valorem tax adjustment factor that is approved by the Mississippi PSC to collect the ad valorem taxes paid by Mississippi Power. In 2018, 2017, and 2016, the Mississippi PSC approved Mississippi Power's annual ad valorem tax adjustment factor filing, which included a rate increase of 0.8% , or $7 million , in 2018, a rate increase of 0.85% , or $8 million , in 2017, and a rate decrease of 0.07% , or $1 million , in 2016.
System Restoration Rider
Mississippi Power carries insurance for the cost of certain types of damage to generation plants and general property. However, Mississippi Power is self-insured for the cost of storm, fire, and other uninsured casualty damage to its property, including transmission and distribution facilities. As permitted by the Mississippi PSC and the FERC, Mississippi Power accrues for the cost of such damage through an annual expense accrual credited to regulatory liability accounts for the retail and wholesale jurisdictions. The cost of repairing actual damage resulting from such events that individually exceed $50,000 is charged to the reserve. Every three years the Mississippi PSC, the MPUS, and Mississippi Power will agree on SRR revenue level(s) for the ensuing period, based on historical data, expected exposure, type and amount of insurance coverage, excluding insurance cost, and any other relevant information. The accrual amount and the reserve balance are determined based on the SRR revenue level(s). If a significant change in circumstances occurs, then the SRR revenue level can be adjusted more frequently if Mississippi Power and the MPUS or the Mississippi PSC deem the change appropriate. The property damage reserve accrual will be the difference between the approved SRR revenues and the SRR revenue requirement, excluding any accrual to the reserve. In addition, SRR allows Mississippi Power to set up a regulatory asset, pending review, if the allowable actual retail property damage costs exceed the amount in the retail property damage reserve. Mississippi Power made retail accruals of $1 million , $3 million , and $4 million for 2018 , 2017 , and 2016 , respectively. Mississippi Power also accrued $0.3 million annually in 2018 , 2017 , and 2016 for the wholesale jurisdiction. As of December 31, 2018 , the property damage reserve balances were $55 million and $1 million for retail and wholesale, respectively.
Based on Mississippi Power's annual SRR rate filings, the SRR rate was zero for all years presented and Mississippi Power accrued $2 million , $4 million , and $3 million to the property damage reserve in 2018, 2017, and 2016, respectively. The SRR rate filings were suspended by the Mississippi PSC for review for a period not to exceed 120 days from their respective filing dates, after which the filings became effective.
In January 2017, a tornado caused extensive damage to Mississippi Power's transmission and distribution infrastructure. The cost of storm damage repairs was approximately $9 million . A portion of these costs was charged to the retail property damage reserve and addressed in the 2018 SRR rate filing.
Kemper County Energy Facility
Overview
The Kemper County energy facility was designed to utilize IGCC technology with an expected output capacity of 582 MWs and to be fueled by locally mined lignite (an abundant, lower heating value coal) from a mine owned by Mississippi Power and situated adjacent to the Kemper County energy facility. The mine, operated by North American Coal Corporation, started commercial operation in 2013. In connection with the Kemper County energy facility construction, Mississippi Power constructed approximately 61 miles of CO 2 pipeline infrastructure for the transport of captured CO 2 for use in enhanced oil recovery.
Schedule and Cost Estimate
In 2012, the Mississippi PSC issued an order (2012 MPSC CPCN Order), confirming the CPCN originally approved by the Mississippi PSC in 2010 authorizing the acquisition, construction, and operation of the Kemper County energy facility. The certificated cost estimate of the Kemper County energy facility included in the 2012 MPSC CPCN Order was $2.4 billion , net of approximately $0.57 billion for the cost of the lignite mine and equipment, the cost of the CO 2 pipeline facilities, AFUDC, and certain general exceptions (Cost Cap Exceptions). The 2012 MPSC CPCN Order approved a construction cost cap of up to $2.88 billion , with recovery of prudently-incurred costs subject to approval by the Mississippi PSC. The Kemper County energy facility was originally projected to be placed in service in May 2014. Mississippi Power placed the combined cycle and the associated common facilities portion of the Kemper County energy facility in service in August 2014. The combined cycle and associated common facilities portions of the Kemper County energy facility were dedicated as Plant Ratcliffe on April 27, 2018.
On June 21, 2017, the Mississippi PSC stated its intent to issue an order, which occurred on July 6, 2017, directing Mississippi Power to pursue a settlement under which the Kemper County energy facility would be operated as a natural gas plant, rather than an IGCC plant, and address all issues associated with the Kemper County energy facility. The order established a new docket for the purpose of pursuing a global settlement of the related costs (Kemper Settlement Docket). On June 28, 2017, Mississippi

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Power notified the Mississippi PSC that it would begin a process to suspend operations and start-up activities on the gasifier portion of the Kemper County energy facility, given the uncertainty as to its future.
At the time of project suspension in June 2017, the total cost estimate for the Kemper County energy facility was approximately $7.38 billion , including approximately $5.95 billion of costs subject to the construction cost cap, and was net of the $137 million in additional grants from the DOE received in April 2016. In the aggregate, Mississippi Power had recorded charges to income of $3.07 billion ( $1.89 billion after tax) as a result of changes in the cost estimate above the cost cap for the Kemper IGCC through May 31, 2017.
Given the Mississippi PSC's stated intent regarding no further rate increase for the Kemper County energy facility and the subsequent suspension, cost recovery of the gasifier portions became no longer probable; therefore, Mississippi Power recorded an additional charge to income in June 2017 of $2.8 billion ( $2.0 billion after tax), which included estimated costs associated with the gasification portions of the plant and lignite mine. During the third and fourth quarters of 2017, Mississippi Power recorded charges to income of $242 million ( $206 million after tax), including $164 million for ongoing project costs, estimated mine and gasifier-related costs, and certain termination costs during the suspension period prior to conclusion of the Kemper Settlement Docket, as well as the charge associated with the Kemper Settlement Agreement discussed below.
In 2018, Mississippi Power recorded pre-tax charges to income of $37 million ( $27 million after tax), primarily resulting from the abandonment and related closure activities and ongoing period costs, net of sales proceeds, for the mine and gasifier-related assets at the Kemper County energy facility. In addition, Mississippi Power recorded a credit to earnings of $95 million in the fourth quarter 2018 primarily resulting from the reduction of a valuation allowance for a state income tax NOL carryforward associated with the Kemper County energy facility. Additional closure costs for the mine and gasifier-related assets, currently estimated at up to $10 million pre-tax (excluding salvage, net of dismantlement costs), may be incurred through the first half of 2020. In addition, period costs, including, but not limited to, costs for compliance and safety, ARO accretion, and property taxes for the mine and gasifier-related assets, are estimated to total $11 million in 2019 and $2 million to $4 million annually in 2020 through 2023. Mississippi Power is currently evaluating its options regarding the final disposition of the CO 2 pipeline, including removal of the pipeline. This evaluation is expected to be complete later in 2019. If Mississippi Power ultimately decides to remove the CO 2 pipeline, the cost of removal would have a material impact on Mississippi Power's financial statements and could have a material impact on Southern Company's financial statements. The ultimate outcome of these matters cannot be determined at this time.
See Note 10 for additional information.
Rate Recovery
Kemper Settlement Agreement
In 2015, the Mississippi PSC issued an order (In-Service Asset Rate Order) regarding the Kemper County energy facility assets that were commercially operational and providing service to customers (the transmission facilities, combined cycle, natural gas pipeline, and water pipeline) and other related costs. The In-Service Asset Rate Order provided for retail rate recovery of an annual revenue requirement of approximately $126 million which went into effect on December 17, 2015.
On February 6, 2018, the Mississippi PSC voted to approve a settlement agreement related to cost recovery for the Kemper County energy facility among Mississippi Power, the MPUS, and certain intervenors (Kemper Settlement Agreement), which resolved all cost recovery issues, modified the CPCN to limit the Kemper County energy facility to natural gas combined cycle operation, and provided for an annual revenue requirement of approximately $99.3 million for costs related to the Kemper County energy facility, which included the impact of the Tax Reform Legislation. The revenue requirement is based on (i) a fixed ROE for 2018 of 8.6% excluding any performance adjustment, (ii) a ROE for 2019 calculated in accordance with PEP, excluding the performance adjustment, (iii) for future years, a performance-based ROE calculated pursuant to PEP, and (iv) amortization periods for the related regulatory assets and liabilities of eight years and six years, respectively. The revenue requirement also reflects a disallowance related to a portion of Mississippi Power's investment in the Kemper County energy facility requested for inclusion in rate base, which was recorded in the fourth quarter 2017 as an additional charge to income of approximately $78 million ( $85 million net of accumulated depreciation of $7 million ) pre-tax ( $48 million after tax).
Under the Kemper Settlement Agreement, retail customer rates reflect a reduction of approximately $26.8 million annually, effective with the first billing cycle of April 2018, and include no recovery for costs associated with the gasifier portion of the Kemper County energy facility in 2018 or at any future date.
Reserve Margin Plan
On August 6, 2018, Mississippi Power filed its proposed Reserve Margin Plan (RMP), as required by the Mississippi PSC's order in the Kemper Settlement Docket. Under the RMP, Mississippi Power proposed alternatives that would reduce its reserve margin,

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with the most economic of the alternatives being the two -year and seven -year acceleration of the retirement of Plant Watson Units 4 and 5, respectively, to the first quarter 2022 and the four -year acceleration of the retirement of Plant Greene County Units 1 and 2 to the third quarter 2021 and the third quarter 2022, respectively, in order to lower or avoid operating costs. The Plant Greene County unit retirements would require the completion by Alabama Power of proposed transmission and system reliability improvements, as well as agreement by Alabama Power. The RMP filing also states that, in the event the Mississippi PSC ultimately approves an alternative that includes an accelerated retirement, Mississippi Power would require authorization to defer in a regulatory asset for future recovery the remaining net book value of the units at the time of retirement. A decision by the Mississippi PSC that does not include recovery of the remaining book value of any generating units retired could have a material impact on Mississippi Power's and Southern Company's financial statements. The ultimate outcome of this matter cannot be determined at this time.
Lignite Mine and CO 2 Pipeline Facilities
Mississippi Power owns the lignite mine and equipment and mineral reserves located around the Kemper County energy facility site. The mine started commercial operation in June 2013.
In 2010, Mississippi Power executed a 40 -year management fee contract with Liberty Fuels Company, LLC (Liberty Fuels), a wholly-owned subsidiary of The North American Coal Corporation, which developed, constructed, and is responsible for the mining operations through the end of the mine reclamation. As the mining permit holder, Liberty Fuels has a legal obligation to perform mine reclamation and Mississippi Power has a contractual obligation to fund all reclamation activities. As a result of the abandonment of the Kemper IGCC, final mine reclamation began in 2018 and is expected to be substantially completed in 2020, with monitoring expected to continue through 2027. See Note 6 and Note 7 under "Mississippi Power" for additional information.
In addition, Mississippi Power constructed the CO 2 pipeline for the planned transport of captured CO 2 for use in enhanced oil recovery and entered into an agreement with Denbury Onshore (Denbury) to purchase the captured CO 2 . The agreement with Denbury was terminated in December 2018 and did not have a material impact on Southern Company's or Mississippi Power's results of operations. Mississippi Power is currently evaluating its options regarding the final disposition of the CO 2 pipeline, including removal of the pipeline. This evaluation is expected to be complete later in 2019. If Mississippi Power ultimately decides to remove the CO 2 pipeline, the cost of removal would have a material impact on Mississippi Power's financial statements and could have a material impact on Southern Company's financial statements. The ultimate outcome of this matter cannot be determined at this time.
Government Grants
In 2010, the DOE, through a cooperative agreement with SCS, agreed to fund $270 million of the Kemper County energy facility through the grants awarded to the project by the DOE under the Clean Coal Power Initiative Round 2. Through December 31, 2018, Mississippi Power received total DOE grants of $387 million , of which $382 million reduced the construction costs of the Kemper County energy facility and $5 million reimbursed Mississippi Power for expenses associated with DOE reporting. On December 12, 2018, Mississippi Power filed with the DOE its request for property closeout certification under the contract related to the grants received. Mississippi Power and the DOE are currently in discussions regarding the requested closeout and property disposition, which may require payment to the DOE for a portion of certain property that is to be retained by Mississippi Power. The ultimate outcome of this matter cannot be determined at this time; however, it could have a material impact on Mississippi Power's financial statements and a significant impact on Southern Company's financial statements.

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Southern Company Gas
Regulatory Assets and Liabilities
Regulatory assets and (liabilities) reflected in the balance sheets of Southern Company Gas at December 31, 2018 and 2017 relate to:
 
2018
 
2017
 
Note
 
(in millions)
 
 
Environmental remediation
$
311

 
$
410

 
(a,b)
Retiree benefit plans
161

 
270

 
(a,c)
Long-term debt fair value adjustment
121

 
138

 
(d)
Under recovered regulatory clause revenues
90

 
98

 
(e)
Other regulatory assets
59

 
79

 
(f)
Other cost of removal obligations
(1,585
)
 
(1,646
)
 
(g)
Deferred income tax credits
(940
)
 
(1,063
)
 
(g,i)
Over recovered regulatory clause revenues
(43
)
 
(144
)
 
(e)
Other regulatory liabilities
(46
)
 
(21
)
 
(h)
Total regulatory assets (liabilities), net
$
(1,872
)
 
$
(1,879
)
 
 
Note: Unless otherwise noted, the recovery and amortization periods for these regulatory assets and (liabilities) have been approved or accepted by the relevant state PSC or other regulatory body and are as follows:
(a)
Not earning a return as offset in rate base by a corresponding asset or liability.
(b)
Recovered through environmental cost recovery mechanisms when the remediation is performed or the work is performed.
(c)
Recovered and amortized over the average remaining service period which range up to 15 years . See Note  11 for additional information.
(d)
Recovered over the remaining life of the original debt issuances, which range up to 20 years .
(e)
Recorded and recovered or amortized over periods generally not exceeding seven years . In addition to natural gas cost recovery mechanisms, the natural gas distribution utilities are authorized to utilize other cost recovery mechanisms, such as regulatory riders, which vary by utility but allow recovery of certain costs, such as those related to infrastructure replacement programs, as well as environmental remediation and energy efficiency plans.
(f)
Comprised of several components including unamortized loss on reacquired debt, weather normalization, franchise gas, deferred depreciation, and financial instrument-hedging assets, which are recovered or amortized over periods generally not exceeding 10 years , except for financial hedging-instruments. Financial instrument-hedging assets are recorded over the life of the underlying hedged purchase contracts, which generally do not exceed two years . Upon final settlement, actual costs incurred are recovered, and actual income earned is refunded through the energy cost recovery clause.
(g)
Other cost of removal obligations are recorded and deferred income tax liabilities are amortized over the related property lives, which may range up to 80 years . Cost of removal liabilities will be settled and trued up following completion of the related activities.
(h)
Comprised of several components including amounts to be refunded to customers as a result of the Tax Reform Legislation, energy efficiency programs, and unamortized bond issuance costs and financial instrument-hedging liabilities which are recovered or amortized over periods generally not exceeding 20 years , except for financial hedging-instruments. Financial instrument-hedging liabilities are recorded over the life of the underlying hedged purchase contracts, which generally do not exceed two years . Upon final settlement, actual costs incurred are recovered, and actual income earned is refunded through the energy cost recovery clause. See " Rate Proceedings " herein for additional information regarding customer refunds resulting from the Tax Reform Legislation.
(i)
Includes excess deferred income tax liabilities not subject to normalization as a result of the Tax Reform Legislation, the recovery and amortization of which is expected to be determined by the applicable state regulatory agencies in future rate proceedings. See " Rate Proceedings " herein and Note 10 for additional details.
Infrastructure Replacement Programs and Capital Projects
In addition to capital expenditures recovered through base rates by each of the natural gas distribution utilities, Nicor Gas and Virginia Natural Gas have separate rate riders that provide timely recovery of capital expenditures for specific infrastructure replacement programs. Descriptions of the infrastructure replacement programs and capital projects at the natural gas distribution utilities follow:
Nicor Gas
In 2013, Illinois enacted legislation that allows Nicor Gas to provide more widespread safety and reliability enhancements to its distribution system. The legislation stipulates that rate increases to customers as a result of any infrastructure investments shall not exceed a cumulative annual average of 4.0% or, in any given year, 5.5% of base rate revenues. In 2014, the Illinois Commission approved the nine -year regulatory infrastructure program, Investing in Illinois, subject to annual review. In conjunction with the base rate case order issued by the Illinois Commission on January 31, 2018, Nicor Gas is recovering program costs incurred prior to December 31, 2017 through base rates. Nicor Gas has requested that the program costs incurred

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subsequent to December 31, 2017, which are currently being recovered through a separate rider, be addressed in the base rate case filed November 9, 2018. See " Rate Proceedings " herein for additional information.
Virginia Natural Gas
In 2012, the Virginia Commission approved the Steps to Advance Virginia's Energy (SAVE) program, an accelerated infrastructure replacement program, to be completed over a five -year period. In 2016, the Virginia Commission approved an extension to the SAVE program for Virginia Natural Gas to replace more than 200 miles of aging pipeline infrastructure and invest up to $30 million in 2016 and up to $35 million annually through 2021.
The SAVE program is subject to annual review by the Virginia Commission. In conjunction with the base rate case order issued by the Virginia Commission in December 2017, Virginia Natural Gas is recovering program costs incurred prior to September 1, 2017 through base rates. Program costs incurred subsequent to September 1, 2017 are currently recovered through a separate rider and are subject to future base rate case proceedings.
Atlanta Gas Light
GRAM
In February 2017, the Georgia PSC approved GRAM and a $20 million increase in annual base rate revenues for Atlanta Gas Light, effective March 1, 2017. GRAM adjusts base rates annually, up or down, using an earnings band based on the previously approved ROE of 10.75% and does not collect revenue through special riders and surcharges. Atlanta Gas Light adjusts rates up to the lower end of the band of 10.55% and adjusts rates down to the higher end of the band of 10.95% . Various infrastructure programs previously authorized by the Georgia PSC under Atlanta Gas Light's STRIDE program including the Integrated Vintage Plastic Replacement Program to replace aging plastic pipe and the Integrated System Reinforcement Program to upgrade Atlanta Gas Light's distribution system and LNG facilities in Georgia continue under GRAM and the recovery of and return on the infrastructure program investments are included in annual base rate adjustments. The Georgia PSC reviews Atlanta Gas Light's performance annually under GRAM. See Rate Proceedings " herein for additional information.
Pursuant to the GRAM approval, Atlanta Gas Light and the staff of the Georgia PSC agreed to a variation of the Integrated Customer Growth Program to extend pipeline facilities to serve customers in areas without pipeline access and create new economic development opportunities in Georgia, which was formerly part of the STRIDE program. As a result, a new tariff was created, effective October 10, 2017, to provide up to $15 million annually for Atlanta Gas Light to commit to strategic economic development projects. Projects under this tariff must be approved by the Georgia PSC.
The orders for the STRIDE program provide for recovery of all prudent costs incurred in the performance of the program. Atlanta Gas Light will recover from end-use customers, through billings to Marketers, the costs related to the program, net of any related cost savings. The regulatory asset represents incurred program costs that will be collected through GRAM. The future expected costs to be recovered through rates related to allowed, but not incurred, costs are recognized in an unrecognized ratemaking amount that is not reflected on the balance sheets. This allowed cost is primarily the equity return on the capital investment under the program. See " Unrecognized Ratemaking Amounts " herein for additional information.
Atlanta Gas Light capitalizes and depreciates the capital expenditure costs incurred from the STRIDE programs over the life of the assets. Operations and maintenance costs are expensed as incurred. Recoveries, which are recorded as revenue, are based on a formula that allows Atlanta Gas Light to recover operations and maintenance costs in excess of those included in its current base rates, depreciation, and an allowed rate of return on capital expenditures. However, Atlanta Gas Light is allowed the recovery of carrying costs on the under recovered balance resulting from the timing difference.
PRP
In 2015, Atlanta Gas Light began recovering incremental PRP surcharge amounts through three phased-in increases in addition to its already existing PRP surcharge amount, which was established to address recovery of the under recovered PRP balance of $144 million and the estimated amounts to be earned under the program through 2025. The unrecovered balance is the result of the continued revenue requirement earned under the program offset by the existing and incremental PRP surcharges. The under recovered balance at December 31, 2018 was $171 million , including $95 million of unrecognized equity return. The PRP surcharge will remain in effect until the earlier of the full recovery of the under recovered amount or December 31, 2025. See " Rate Proceedings " and " Unrecognized Ratemaking Amounts " herein for additional information.
One of the capital projects under the PRP experienced construction issues and Atlanta Gas Light was required to complete mitigation work prior to placing it in service. These mitigation costs were included in base rates in 2018. In 2017, Atlanta Gas Light recovered $20 million from the settlement of contractor litigation claims and recovered an additional $7 million from the

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final settlement of contractor litigation claims during the first quarter 2018. Mitigation costs recovered through the legal process are retained by Atlanta Gas Light.
Natural Gas Cost Recovery
With the exception of Atlanta Gas Light, the natural gas distribution utilities are authorized by the relevant regulatory agencies in the states in which they serve to use natural gas cost recovery mechanisms that adjust rates to reflect changes in the wholesale cost of natural gas and ensure recovery of all costs prudently incurred in purchasing natural gas for customers. Natural gas cost recovery revenues are adjusted for differences in actual recoverable natural gas costs and amounts billed in current regulated rates. Changes in the billing factor will not have a significant effect on Southern Company's or Southern Company Gas' revenues or net income, but will affect cash flows.
Rate Proceedings
Nicor Gas
On January 31, 2018, the Illinois Commission approved a $137 million increase in annual base rate revenues, including $93 million related to the recovery of investments under the Investing in Illinois program, effective February 8, 2018, based on a ROE of 9.8% .
On April 19, 2018, the Illinois Commission approved Nicor Gas' variable income tax adjustment rider. This rider provides for refund or recovery of changes in income tax expense that result from income tax rates that differ from those used in Nicor Gas' last rate case. Customer refunds, via bill credits, related to the impacts of the Tax Reform Legislation from January 25, 2018 through May 4, 2018 began on July 1, 2018 and are expected to conclude in the second quarter 2019.
On May 2, 2018, the Illinois Commission approved Nicor Gas' rehearing request for revised base rates to incorporate the reduction in the federal income tax rate as a result of the Tax Reform Legislation. The resulting decrease of approximately $44 million in annual base rate revenues became effective May 5, 2018. Nicor Gas' previously-authorized capital structure and ROE of 9.80% were not addressed in the rehearing and remain unchanged.
On November 9, 2018, Nicor Gas filed a general base rate case with the Illinois Commission requesting a $230 million increase in annual base rate revenues. The requested increase is based on a projected test year for the 12-month period ending September 30, 2020, a ROE of 10.6% , and an increase in the equity ratio from 52.0% to 54.0% to address the negative cash flow and credit metric impacts of the Tax Reform Legislation. The Illinois Commission is expected to rule on the requested increase within the 11-month statutory time limit, after which rate adjustments will be effective. The ultimate outcome of this matter cannot be determined at this time.
Atlanta Gas Light
On February 23, 2018, Atlanta Gas Light revised its annual base rate filing to reflect the impacts of the Tax Reform Legislation and requested a $16 million rate reduction in 2018. On May 15, 2018, the Georgia PSC approved a stipulation for Atlanta Gas Light's annual base rates to remain at the 2017 level for 2018 and 2019, with customer credits of $8 million in each of July 2018 and October 2018 to reflect the impacts of the Tax Reform Legislation. The Georgia PSC maintained Atlanta Gas Light's previously authorized earnings band based on a ROE between 10.55% and 10.95% and increased the allowed equity ratio by 4% to an equity ratio of 55% to address the negative cash flow and credit metric impacts of the Tax Reform Legislation. Additionally, Atlanta Gas Light is required to file a traditional base rate case on or before June 1, 2019 for rates effective January 1, 2020.
Atlanta Gas Light's recovery of the previously unrecovered PRP revenue through 2014, as well as the mitigation costs associated with the PRP that were not previously included in its rates, were included in GRAM. In connection with the GRAM approval, the last monthly PRP surcharge increase became effective March 1, 2017.
Virginia Natural Gas
On December 21, 2017, the Virginia Commission approved a settlement for a $34 million increase in annual base rate revenues, effective September 1, 2017, including $13 million related to the recovery of investments under the SAVE program. See "Regulatory Infrastructure Programs" herein for additional information. An authorized ROE range of 9.0% to 10.0% with a midpoint of 9.5% will be used to determine the revenue requirement in any filing, other than for a change in base rates.
On December 17, 2018, the Virginia Commission approved Virginia Natural Gas' annual information form filing, which reduced annual base rates by $14 million effective January 1, 2019 due to lower tax expense as a result of the lower corporate income tax rate and the impact of the flowback of excess deferred income taxes. This approval also requires Virginia Natural Gas to issue

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customer refunds, via bill credits, for the entire $14 million which was deferred as a regulatory liability, current, on the balance sheet at December 31, 2018. These customer refunds are expected to be completed in the first quarter 2019.
energySMART
The Illinois Commission approved Nicor Gas' energySMART program, which includes energy efficiency program offerings and therm reduction goals. Through December 31, 2017, Nicor Gas spent $107 million of the initial authorized expenditure of $113 million . A new program began on January 1, 2018, with an additional authorized expenditure of $160 million through 2021. Through December 31, 2018, Nicor Gas had spent $29 million .
Unrecognized Ratemaking Amounts
The following table illustrates Southern Company Gas' authorized ratemaking amounts that are not recognized on its balance sheets. These amounts are primarily composed of an allowed equity rate of return on assets associated with certain regulatory infrastructure programs. These amounts will be recognized as revenues in Southern Company Gas' financial statements in the periods they are billable to customers, the majority of which will be recovered by 2025.
 
December 31, 2018
 
December 31, 2017
 
(in millions)
Atlanta Gas Light
$
95

 
$
104

Virginia Natural Gas
11

 
11

Nicor Gas
4

 
2

Total
$
110

 
$
117

FERC Matters
Open Access Transmission Tariff
On May 10, 2018, AMEA and Cooperative Energy filed with the FERC a complaint against SCS and the traditional electric operating companies claiming that the current 11.25% base ROE used in calculating the annual transmission revenue requirements of the traditional electric operating companies' open access transmission tariff is unjust and unreasonable as measured by the applicable FERC standards. The complaint requested that the base ROE be set no higher than 8.65% and that the FERC order refunds for the difference in revenue requirements that results from applying a just and reasonable ROE established in this proceeding upon determining the current ROE is unjust and unreasonable. On June 18, 2018, SCS and the traditional electric operating companies filed their response challenging the adequacy of the showing presented by the complainants and offering support for the current ROE. On September 6, 2018, the FERC issued an order establishing a refund effective date of May 10, 2018 in the event a refund is due and initiating an investigation and settlement procedures regarding the current base ROE. Through December 31, 2018, the estimated maximum potential refund is not expected to be material to Southern Company's or the traditional electric operating companies' results of operations or cash flows. The ultimate outcome of this matter cannot be determined at this time.
Mississippi Power
Municipal and Rural Associations Tariff
Mississippi Power provides wholesale electric service to Cooperative Energy, East Mississippi Electric Power Association, and the City of Collins, all located in southeastern Mississippi, under a long-term cost-based, FERC-regulated MRA tariff.
In 2016, Mississippi Power reached a settlement agreement with its wholesale customers, which was subsequently approved by the FERC, for an increase in wholesale base revenues under the MRA cost-based electric tariff, primarily as a result of placing scrubbers for Plant Daniel Units 1 and 2 in service in 2015. The settlement agreement became effective for services rendered beginning May 1, 2016, resulting in an estimated annual revenue increase of $7 million under the MRA cost-based electric tariff. Additionally, under the settlement agreement, the tariff customers agreed to similar regulatory treatment for MRA tariff ratemaking as the treatment approved for retail ratemaking under the In-Service Asset Rate Order. This regulatory treatment primarily included (i) recovery of the operational Kemper County energy facility assets providing service to customers and other related costs, (ii) amortization of the Kemper County energy facility-related regulatory assets included in rates under the settlement agreement over the 36 months ending April 30, 2019, (iii) Kemper County energy facility-related expenses included in rates under the settlement agreement no longer being deferred and charged to expense, and (iv) removing all of the Kemper

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County energy facility CWIP from rate base with a corresponding increase in accrual of AFUDC, which totaled approximately $22 million through the suspension of Kemper IGCC start-up activities.
Mississippi Power expects to reach a subsequent settlement agreement with its wholesale customers and will make a filing with the FERC during the first quarter 2019. The settlement agreement is intended to be consistent with the Kemper Settlement Agreement, including the impact of the Tax Reform Legislation. The ultimate outcome of this matter cannot be determined at this time.
In September 2017, Mississippi Power and Cooperative Energy executed a Shared Service Agreement (SSA), as part of the MRA tariff, under which Mississippi Power and Cooperative Energy will share in providing electricity to all Cooperative Energy delivery points, in lieu of the current arrangement under which each delivery point is specifically assigned to either entity. The SSA accepted by the FERC in October 2017 became effective on January 1, 2018 and may be cancelled by Cooperative Energy with 10 years notice after December 31, 2020. The SSA provides Cooperative Energy the option to decrease its use of Mississippi Power's generation services under the MRA tariff, subject to annual and cumulative caps and a one -year notice requirement. In the event Cooperative Energy elects to reduce these services, the related reduction in Mississippi Power's revenues is not expected to be significant through 2020.
Fuel Cost Recovery
Mississippi Power has a wholesale MRA and a Market Based (MB) fuel cost recovery factor. Effective with the first billing cycle for January 2018, fuel rates increased $11 million annually for wholesale MRA customers and $1 million annually for wholesale MB customers. Effective January 1, 2019, the wholesale MRA fuel rate decreased $16 million annually and the wholesale MB fuel rate decreased by an immaterial amount. At December 31, 2018, over recovered wholesale MRA fuel costs included in other regulatory liabilities, current on the balance sheet were approximately $6 million compared to an immaterial amount at December 31, 2017. Under recovered wholesale MB fuel costs included in the balance sheets were immaterial at December 31, 2018 and 2017.
Mississippi Power's operating revenues are adjusted for differences in actual recoverable fuel cost and amounts billed in accordance with the currently approved cost recovery rate. Accordingly, changes in the billing factor should have no significant effect on Mississippi Power's revenues or net income, but will affect cash flow.
Southern Company Gas
At December 31, 2018 , Southern Company Gas was involved in two gas pipeline construction projects. These projects, along with Southern Company Gas' existing pipelines, are intended to provide diverse sources of natural gas supplies to customers, resolve current and long-term supply planning for new capacity, enhance system reliability, and generate economic development in the areas served.
On January 19, 2018, the PennEast Pipeline received FERC approval. Work continues with state and federal agencies to obtain the required permits to begin construction. Any material delays may impact forecasted capital expenditures and the expected in-service date.
In October 2017, the Atlantic Coast Pipeline received FERC approval. This joint venture has experienced challenges to its permits since construction began in 2018. During the third and fourth quarters 2018, a FERC stop work order, together with delays in obtaining permits necessary for construction and construction delays due to judicial actions, impacted the cost and schedule for the project. As a result, total project cost estimates have increased from between $6.0 billion and $6.5 billion to between $7.0 billion and $7.8 billion , excluding financing costs. Southern Company Gas' share of the total project costs is 5% and Southern Company Gas' investment at December 31, 2018 totaled $83 million The operator of the joint venture currently expects to achieve a late 2020 in-service date for at least key segments of the Atlantic Coast Pipeline, while the remainder may extend into early 2021. Southern Company Gas has evaluated the recoverability of its investment and determined there was no impairment as of December 31, 2018. Abnormal weather, work delays (including due to judicial or regulatory action), and other conditions may result in additional cost or schedule modifications, which could result in an impairment of Southern Company Gas' investment and could have a material impact on Southern Company's and Southern Company Gas' financial statements.
The ultimate outcome of these matters cannot be determined at this time. See Notes 7 and 9 under " Southern Company Gas Equity Method Investments " and " Guarantees ," respectively, for additional information on these pipeline projects.

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3 . CONTINGENCIES
General Litigation Matters
Each registrant is subject to certain claims and legal actions arising in the ordinary course of business. In addition, the business activities of Southern Company's subsidiaries are subject to extensive governmental regulation related to public health and the environment, such as laws and regulations governing air, water, land, and protection of other natural resources. Litigation over environmental issues and claims of various types, including property damage, personal injury, common law nuisance, and citizen enforcement of environmental laws and regulations has occurred throughout the U.S. This litigation has included claims for damages alleged to have been caused by CO 2 and other emissions, CCR, and alleged exposure to hazardous materials, and/or requests for injunctive relief in connection with such matters.
The ultimate outcome of such pending or potential litigation against each registrant and any subsidiaries cannot be predicted at this time; however, for current proceedings not specifically reported herein, management does not anticipate that the ultimate liabilities, if any, arising from such current proceedings would have a material effect on such registrant's financial statements.
Southern Company
In January 2017, a putative securities class action complaint was filed against Southern Company, certain of its officers, and certain former Mississippi Power officers in the U.S. District Court for the Northern District of Georgia, Atlanta Division, by Monroe County Employees' Retirement System on behalf of all persons who purchased shares of Southern Company's common stock between April 25, 2012 and October 29, 2013. The complaint alleges that Southern Company, certain of its officers, and certain former Mississippi Power officers made materially false and misleading statements regarding the Kemper County energy facility in violation of certain provisions under the Securities Exchange Act of 1934, as amended. The complaint seeks, among other things, compensatory damages and litigation costs and attorneys' fees. In June 2017, the plaintiffs filed an amended complaint that provided additional detail about their claims, increased the purported class period by one day, and added certain other former Mississippi Power officers as defendants. In July 2017, the defendants filed a motion to dismiss the plaintiffs' amended complaint with prejudice, to which the plaintiffs filed an opposition in September 2017. On March 29, 2018, the U.S. District Court for the Northern District of Georgia, Atlanta Division, issued an order granting, in part, the defendants' motion to dismiss. The court dismissed certain claims against certain officers of Southern Company and Mississippi Power and dismissed the allegations related to a number of the statements that plaintiffs challenged as being false or misleading. On April 26, 2018, the defendants filed a motion for reconsideration of the court's order, seeking dismissal of the remaining claims in the lawsuit. On August 10, 2018, the court denied the motion for reconsideration and denied a motion to certify the issue for interlocutory appeal.
In February 2017, Jean Vineyard filed a shareholder derivative lawsuit and, in May 2017, Judy Mesirov filed a shareholder derivative lawsuit, each in the U.S. District Court for the Northern District of Georgia. Each of these lawsuits names as defendants Southern Company, certain of its directors, certain of its officers, and certain former Mississippi Power officers. In August 2017, these two shareholder derivative lawsuits were consolidated in the U.S. District Court for the Northern District of Georgia. The complaints allege that the defendants caused Southern Company to make false or misleading statements regarding the Kemper County energy facility cost and schedule. Further, the complaints allege that the defendants were unjustly enriched and caused the waste of corporate assets and also allege that the individual defendants violated their fiduciary duties. Each plaintiff seeks to recover, on behalf of Southern Company, unspecified actual damages and, on each plaintiff's own behalf, attorneys' fees and costs in bringing the lawsuit. Each plaintiff also seeks certain changes to Southern Company's corporate governance and internal processes. On April 25, 2018, the court entered an order staying this lawsuit until 30 days after the resolution of any dispositive motions or any settlement, whichever is earlier, in the putative securities class action.
In May 2017, Helen E. Piper Survivor's Trust filed a shareholder derivative lawsuit in the Superior Court of Gwinnett County, State of Georgia that names as defendants Southern Company, certain of its directors, certain of its officers, and certain former Mississippi Power officers. The complaint alleges that the individual defendants, among other things, breached their fiduciary duties in connection with schedule delays and cost overruns associated with the construction of the Kemper County energy facility. The complaint further alleges that the individual defendants authorized or failed to correct false and misleading statements regarding the Kemper County energy facility schedule and cost and failed to implement necessary internal controls to prevent harm to Southern Company. The plaintiff seeks to recover, on behalf of Southern Company, unspecified actual damages and disgorgement of profits and, on its behalf, attorneys' fees and costs in bringing the lawsuit. The plaintiff also seeks certain unspecified changes to Southern Company's corporate governance and internal processes. On May 4, 2018, the court entered an order staying this lawsuit until 30 days after the resolution of any dispositive motions or any settlement, whichever is earlier, in the putative securities class action.

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Southern Company believes these legal challenges have no merit; however, an adverse outcome in any of these proceedings could have an impact on Southern Company's results of operations, financial condition, and liquidity. Southern Company will vigorously defend itself in these matters, the ultimate outcome of which cannot be determined at this time.
Alabama Power
On March 2, 2018, the Alabama Department of Environmental Management (ADEM) issued proposed administrative orders assessing a penalty of $1.25 million to Alabama Power for unpermitted discharge of fluids and/or pollutants to groundwater at five electric generating plants. The orders were finalized and Alabama Power paid the penalty on September 27, 2018. This matter is now concluded.
Georgia Power
In 2011, plaintiffs filed a putative class action against Georgia Power in the Superior Court of Fulton County, Georgia alleging that Georgia Power's collection in rates of amounts for municipal franchise fees (which fees are paid to municipalities) exceeded the amounts allowed in orders of the Georgia PSC and alleging certain state tort law claims. In 2016, the Georgia Court of Appeals reversed the trial court's previous dismissal of the case and remanded the case to the trial court. Georgia Power filed a petition for writ of certiorari with the Georgia Supreme Court, which was granted in August 2017. On June 18, 2018, the Georgia Supreme Court affirmed the judgment of the Georgia Court of Appeals and remanded the case to the trial court for further proceedings. Following a motion by Georgia Power, on February 13, 2019, the Superior Court of Fulton County entered an order staying this lawsuit for 60 days and ordered the parties to submit petitions to the Georgia PSC within 20 days for a declaratory ruling to address certain terms the court previously held were ambiguous as used in the Georgia PSC's orders. The order entered by the Superior Court of Fulton County also conditionally certified the proposed class. Georgia Power believes the plaintiffs' claims have no merit and will continue to vigorously defend itself in this matter. The amount of any possible losses cannot be calculated at this time because, among other factors, it is unknown whether conditional class certification will be upheld and the ultimate composition of any class; and whether any losses would be subject to recovery from any municipalities. The ultimate outcome of this matter cannot be determined at this time.
Mississippi Power
In 2016, a complaint against Mississippi Power was filed in Harrison County Circuit Court (Circuit Court) by Biloxi Freezing & Processing Inc., Gulfside Casino Partnership, and John Carlton Dean, which was amended and refiled to include, among other things, Southern Company as a defendant. The individual plaintiff alleged that Mississippi Power and Southern Company violated the Mississippi Unfair Trade Practices Act. All plaintiffs alleged that Mississippi Power and Southern Company concealed, falsely represented, and failed to fully disclose important facts concerning the cost and schedule of the Kemper County energy facility and that these alleged breaches unjustly enriched Mississippi Power and Southern Company. The plaintiffs sought unspecified actual damages and punitive damages; asked the Circuit Court to appoint a receiver to oversee, operate, manage, and otherwise control all affairs relating to the Kemper County energy facility; asked the Circuit Court to revoke any licenses or certificates authorizing Mississippi Power or Southern Company to engage in any business related to the Kemper County energy facility in Mississippi; and sought attorney's fees, costs, and interest. The plaintiffs also sought an injunction to prevent any Kemper County energy facility costs from being charged to customers through electric rates. In June 2017, the Circuit Court ruled in favor of motions by Southern Company and Mississippi Power and dismissed the case. In July 2017, the plaintiffs filed notice of an appeal. On July 13, 2018, Mississippi Power and Southern Company reached a settlement agreement with the plaintiffs and the plaintiffs' appeal was dismissed with prejudice. The settlement had no material impact on Southern Company's or Mississippi Power's financial statements.
On May 18, 2018, Southern Company and Mississippi Power received a notice of dispute and arbitration demand filed by Martin Product Sales, LLC (Martin) based on two agreements, both related to Kemper IGCC byproducts for which Mississippi Power provided termination notices in September 2017. Martin alleges breach of contract, breach of good faith and fair dealing, fraud and misrepresentation, and civil conspiracy and makes a claim for damages in the amount of approximately $143 million , as well as additional unspecified damages, attorney's fees, costs, and interest. In the first quarter 2019, Mississippi Power and Southern Company filed motions to dismiss. Southern Company and Mississippi Power believe this legal challenge has no merit; however, an adverse outcome in this proceeding could have a material impact on Southern Company's and Mississippi Power's results of operations, financial condition, and liquidity. Southern Company and Mississippi Power will vigorously defend themselves in this matter, the ultimate outcome of which cannot be determined at this time.
On November 21, 2018, Ray C. Turnage and 10 other individual plaintiffs filed a putative class action complaint against Mississippi Power and the three current members of the Mississippi PSC in the U.S. District Court for the Southern District of Mississippi. Mississippi Power received Mississippi PSC approval in 2013 to charge a mirror CWIP rate premised upon including

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in its rate base pre-construction and construction costs for the Kemper IGCC prior to placing the Kemper IGCC into service. The Mississippi Supreme Court reversed that approval and ordered Mississippi Power to refund the amounts paid by customers under the previously-approved mirror CWIP rate. The plaintiffs allege that the initial approval process, and the amount approved, were improper. They also allege that Mississippi Power underpaid customers in the refund process because it applied the wrong interest rate to the payments. The plaintiffs seek to recover, on behalf of themselves and their putative class, actual damages, punitive damages, pre-judgment interest, post-judgment interest, attorney's fees, and costs. Mississippi Power believes this legal challenge has no merit; however, an adverse outcome in this proceeding could have a material impact on Mississippi Power's results of operations, financial condition, and liquidity. Mississippi Power will vigorously defend itself in this matter, the ultimate outcome of which cannot be determined at this time.
Southern Power
Southern Power indirectly owns a 51% membership interest in RE Roserock LLC (Roserock), the owner of the Roserock facility in Pecos County, Texas. Prior to the facility being placed in service in November 2016, certain solar panels were damaged during installation by the construction contractor, McCarthy Building Companies, Inc. (McCarthy), and certain solar panels were damaged by a hail event that also occurred during construction. In connection therewith, Southern Power is withholding payments of approximately $26 million from the construction contractor, which has placed a lien on the Roserock facility for the same amount. In May 2017, Roserock filed a lawsuit in the state district court in Pecos County, Texas, (State Court lawsuit) against XL Insurance America, Inc. (XL) and North American Elite Insurance Company (North American Elite) seeking recovery from an insurance policy for damages resulting from the hail storm and McCarthy's installation practices. On June 1, 2018, the court in the State Court lawsuit granted Roserock's motion for partial summary judgment, finding that the insurers were in breach of contract and in violation of the Texas Insurance Code for failing to pay any monies owed for the hail claim. In addition to the State Court lawsuit, lawsuits were filed between Roserock and McCarthy, as well as other parties, and that litigation has been consolidated in the U.S. District Court for the Western District of Texas. Southern Power intends to vigorously pursue and defend these matters, the ultimate outcome of which cannot be determined at this time.
Southern Company Gas
Nicor Energy Services Company, doing business as Pivotal Home Solutions, formerly a wholly-owned subsidiary of Southern Company Gas, was a defendant in a putative class action initially filed in 2017 in the state court in Indiana. The plaintiffs purported to represent a class of the customers who purchased products from Nicor Energy Services Company and alleged that the marketing, sale, and billing of the products violated the Indiana Consumer Fraud and Deceptive Business Practices Act, constituting common law fraud and resulting in unjust enrichment of these entities. In 2018, Nicor Energy Services Company was named in a second class action filed in the state court of Ohio asserting nearly identical allegations and legal claims. The plaintiffs sought, on behalf of the classes they purported to represent, actual and punitive damages, interest costs, attorney fees, and injunctive relief. To facilitate the sale of Pivotal Home Solutions, Southern Company Gas retained most of the financial responsibility for these lawsuits following the completion of the sale. On June 12, 2018, the parties settled these claims and Southern Company Gas recorded an $11 million charge, which is included in other operations and maintenance expenses for the year ended December 31, 2018 .
Southern Company Gas is involved in litigation relating to an incident that occurred in one of its prior service territories that resulted in several deaths, injuries, and property damage. Southern Company Gas has resolved all claims for personal injuries or death, but it is continuing to defend litigation seeking to recover alleged property damages. Southern Company Gas has insurance that provides full coverage of the expected financial exposure in excess of $11 million per incident. During the successor period ended December 31, 2016, Southern Company Gas recorded reserves for substantially all of its potential exposure from these cases.
Environmental Remediation
The Southern Company system must comply with environmental laws and regulations governing the handling and disposal of waste and releases of hazardous substances. Under these various laws and regulations, the Southern Company system could incur substantial costs to clean up affected sites. The traditional electric operating companies and the natural gas distribution utilities conduct studies to determine the extent of any required cleanup and have recognized the estimated costs to clean up known impacted sites in the financial statements. A liability for environmental remediation costs is recognized only when a loss is determined to be probable and reasonably estimable. The traditional electric operating companies and the natural gas distribution utilities in Illinois and Georgia have each received authority from their respective state PSCs or other applicable state regulatory agencies to recover approved environmental compliance costs through regulatory mechanisms. These regulatory mechanisms are adjusted annually or as necessary within limits approved by the state PSCs or other applicable state regulatory agencies. At

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December 31, 2018 and 2017 , the environmental remediation liabilities of Alabama Power and Mississippi Power were immaterial.
Georgia Power has been designated or identified as a potentially responsible party at sites governed by the Georgia Hazardous Site Response Act and/or by the federal Comprehensive Environmental Response, Compensation, and Liability Act, and assessment and potential cleanup of such sites is expected. In 2013, the Georgia PSC approved the 2013 ARP including the recovery of approximately $2 million annually through the ECCR tariff. Georgia Power recognizes a liability for environmental remediation costs only when it determines a loss is probable and reasonably estimable and reduces the reserve as expenditures are incurred. Any difference between the liabilities accrued and costs recovered through rates is deferred as a regulatory asset or liability. The annual recovery amount is expected to be adjusted as part of the Georgia Power 2019 Base Rate Case and further adjusted in future regulatory proceedings.
Southern Company Gas is subject to environmental remediation liabilities associated with 40 former MGP sites in four different states. Southern Company Gas' accrued environmental remediation liability at December 31, 2018 and 2017 was based on the estimated cost of environmental investigation and remediation associated with known current and former MGP operating sites. These environmental remediation expenditures are recoverable from customers through rate mechanisms approved by the applicable state regulatory agencies of the natural gas distribution utilities, with the exception of one site representing $2 million of the accrued remediation costs.
At December 31, 2018 and 2017 , the environmental remediation liability and the balance of under recovered environmental remediation costs were reflected in the balance sheets as follows:
 
Southern Company
Georgia
Power
Southern Company Gas
 
(in millions)
December 31, 2018:
 
 
 
Environmental remediation liability:
 
 
 
Other current liabilities
$
49

$
23

$
26

Accrued environmental remediation
268


268

Under recovered environmental remediation costs:
 
 
 
Other regulatory assets, current
$
21

$
2

$
19

Other regulatory assets, deferred
345

53

292

 
 
 
 
December 31, 2017:
 
 
 
Environmental remediation liability:
 
 
 
Other current liabilities
$
73

$
22

$
46

Accrued environmental remediation (*)
389


342

Under recovered environmental remediation costs:
 
 
 
Other regulatory assets, current
$
38

$
2

$
31

Other regulatory assets, deferred
473

47

379

(*)
At December 31, 2017, $85 million of Southern Company Gas' total environmental remediation liability related to Elizabethtown Gas, which was sold on July 1, 2018. See Note 15 under " Southern Company Gas " for more information regarding Southern Company Gas' sale of Elizabethtown Gas.
The ultimate outcome of these matters cannot be determined at this time; however, as a result of the regulatory treatment for environmental remediation expenses described above, the final disposition of these matters is not expected to have a material impact on the financial statements of Southern Company, Georgia Power, or Southern Company Gas.
Nuclear Fuel Disposal Costs
Acting through the DOE and pursuant to the Nuclear Waste Policy Act of 1982, the U.S. government entered into contracts with Alabama Power and Georgia Power that require the DOE to dispose of spent nuclear fuel and high level radioactive waste generated at Plants Farley, Hatch, and Vogtle Units 1 and 2 beginning no later than January 31, 1998. The DOE has yet to commence the performance of its contractual and statutory obligation to dispose of spent nuclear fuel. Consequently, Alabama Power and Georgia Power pursued and continue to pursue legal remedies against the U.S. government for its partial breach of contract.

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In 2014, Alabama Power and Georgia Power filed lawsuits against the U.S. government for the costs of continuing to store spent nuclear fuel at Plants Farley, Hatch, and Vogtle Units 1 and 2 for the period from January 1, 2011 through December 31, 2013. The damage period was subsequently extended to December 31, 2014. In October 2017, Alabama Power and Georgia Power filed additional lawsuits against the U.S. government in the Court of Federal Claims for the costs of continuing to store spent nuclear fuel at Plants Farley, Hatch, and Vogtle Units 1 and 2 for the period from January 1, 2015 through December 31, 2017. Damages will continue to accumulate until the issue is resolved, the U.S. government disposes of Alabama Power's and Georgia Power's spent nuclear fuel pursuant to its contractual obligations, or alternative storage is otherwise provided. No amounts have been recognized in the financial statements as of December 31, 2018 for any potential recoveries from the pending lawsuits. The final outcome of these matters cannot be determined at this time. However, Alabama Power and Georgia Power expect to credit any recoveries back for the benefit of customers in accordance with direction from their respective PSC and, therefore, no material impact on Southern Company's, Alabama Power's, or Georgia Power's net income is expected.
On-site dry spent fuel storage facilities are operational at all three plants and can be expanded to accommodate spent fuel through the expected life of each plant.
Nuclear Insurance
Under the Price-Anderson Amendments Act (Act), Alabama Power and Georgia Power maintain agreements of indemnity with the NRC that, together with private insurance, cover third-party liability arising from any nuclear incident occurring at the companies' nuclear power plants. The Act provides funds up to $14.1 billion for public liability claims that could arise from a single nuclear incident. Each nuclear plant is insured against this liability to a maximum of $450 million by American Nuclear Insurers (ANI), with the remaining coverage provided by a mandatory program of deferred premiums that could be assessed, after a nuclear incident, against all owners of commercial nuclear reactors. A company could be assessed up to $138 million per incident for each licensed reactor it operates but not more than an aggregate of $20 million per incident to be paid in a calendar year for each reactor. Such maximum assessment, excluding any applicable state premium taxes, for Alabama Power and Georgia Power, based on its ownership and buyback interests in all licensed reactors, is $275 million and $267 million , respectively, per incident, but not more than an aggregate of $41 million and $40 million , respectively, to be paid for each incident in any one year. Both the maximum assessment per reactor and the maximum yearly assessment are adjusted for inflation at least every five years . The next scheduled adjustment is due no later than September 10, 2023. See Note 5 under " Joint Ownership Agreements " for additional information on joint ownership agreements.
Alabama Power and Georgia Power are members of Nuclear Electric Insurance Limited (NEIL), a mutual insurer established to provide property damage insurance in an amount up to $1.5 billion for members' operating nuclear generating facilities. Additionally, both companies have NEIL policies that currently provide decontamination, excess property insurance, and premature decommissioning coverage up to $1.25 billion for nuclear losses and policies providing coverage up to $750 million for non-nuclear losses in excess of the $1.5 billion primary coverage.
NEIL also covers the additional costs that would be incurred in obtaining replacement power during a prolonged accidental outage at a member's nuclear plant. Members can purchase this coverage, subject to a deductible waiting period of up to 26 weeks , with a maximum per occurrence per unit limit of $490 million . After the deductible period, weekly indemnity payments would be received until either the unit is operational or until the limit is exhausted. Alabama Power and Georgia Power each purchase limits based on the projected full cost of replacement power, subject to ownership limitations, and have each elected a 12-week deductible waiting period for each nuclear plant.
A builders' risk property insurance policy has been purchased from NEIL for the construction of Plant Vogtle Units 3 and 4. This policy provides the Vogtle Owners up to $2.75 billion for accidental property damage occurring during construction.
Under each of the NEIL policies, members are subject to assessments each year if losses exceed the accumulated funds available to the insurer. The maximum annual assessments for Alabama Power and Georgia Power as of December 31, 2018 under the NEIL policies would be $56 million and $85 million , respectively.
Claims resulting from terrorist acts are covered under both the ANI and NEIL policies (subject to normal policy limits). The aggregate, however, that NEIL will pay for all claims resulting from terrorist acts in any 12-month period is $3.2 billion plus such additional amounts NEIL can recover through reinsurance, indemnity, or other sources.
For all on-site property damage insurance policies for commercial nuclear power plants, the NRC requires that the proceeds of such policies shall be dedicated first for the sole purpose of placing the reactor in a safe and stable condition after an accident. Any remaining proceeds are to be applied next toward the costs of decontamination and debris removal operations ordered by the NRC, and any further remaining proceeds are to be paid either to the applicable company or to its debt trustees as may be appropriate under the policies and applicable trust indentures. In the event of a loss, the amount of insurance available might not be adequate to cover property damage and other expenses incurred. Uninsured losses and other expenses, to the extent not

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recovered from customers, would be borne by Alabama Power or Georgia Power, as applicable, and could have a material effect on Southern Company's, Alabama Power's, and Georgia Power's financial condition and results of operations.
All retrospective assessments, whether generated for liability, property, or replacement power, may be subject to applicable state premium taxes.
Other Matters
Mississippi Power
In 2013, Mississippi Power submitted a lost revenue claim under the Deep Horizon Economic and Property Damages Settlement Agreement associated with the oil spill that occurred in the Gulf of Mexico in 2010. On May 14, 2018, Mississippi Power's claim was settled. The settlement proceeds of $18 million , net of expenses and income tax, are included in Mississippi Power's earnings for 2018. As of December 31, 2018, Mississippi Power had received half of the settlement proceeds.
Southern Company Gas
A wholly-owned subsidiary of Southern Company Gas owns and operates a natural gas storage facility consisting of two salt dome caverns in Louisiana. Periodic integrity tests are required in accordance with rules of the Louisiana Department of Natural Resources (DNR). In August 2017, in connection with an ongoing integrity project, updated seismic mapping indicated the proximity of one of the caverns to the edge of the salt dome may be less than the required minimum and could result in Southern Company Gas retiring the cavern early. At December 31, 2018 , the facility's property, plant, and equipment had a net book value of $109 million , of which the cavern itself represents approximately 20% . A potential early retirement of this cavern is dependent upon several factors including compliance with an order from the Louisiana DNR detailing the requirements to place the cavern back in service, which includes, among other things, obtaining core samples to determine the composition of the sheath surrounding the edge of the salt dome.
The cavern continues to maintain its pressures and overall structural integrity. These events were considered in connection with Southern Company Gas' annual long-lived asset impairment analysis, which determined there was no impairment as of December 31, 2018 . Any changes in results of monitoring activities, rates at which expiring capacity contracts are re-contracted, timing of placing the cavern back in service, or Louisiana DNR requirements could trigger impairment. Further, early retirement of the cavern could trigger impairment of other long-lived assets associated with the natural gas storage facility. The ultimate outcome of this matter cannot be determined at this time, but could have a significant impact on Southern Company's or Southern Company Gas' financial statements.
4 . REVENUE FROM CONTRACTS WITH CUSTOMERS
The registrants generate revenues from a variety of sources, some of which are excluded from the scope of ASC 606, such as leases, derivatives, and certain cost recovery mechanisms. See Note 1 under " Recently Adopted Accounting Standards Revenue " for additional information on the adoption of ASC 606 for revenue from contracts with customers and under "Revenues" for additional information on the revenue policies of the registrants.

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The following tables disaggregate revenue sources for the year ended December 31, 2018 :
 
2018
 
(in millions)
Southern Company
 
Operating revenues
 
Retail electric revenues (a)
 
Residential
$
6,608

Commercial
5,266

Industrial
3,224

Other
124

Natural gas distribution revenues
3,175

Alternative revenue programs (b)
(20
)
Total retail electric and gas distribution revenues
$
18,377

Wholesale energy revenues (c)(d)
1,896

Wholesale capacity revenues (d)
620

Other natural gas revenues (e)
699

Other revenues (f)
1,903

Total operating revenues
$
23,495

(a)
Retail electric revenues include $75 million of leases and a net increase of $60 million from certain cost recovery mechanisms that are not accounted for as revenue under ASC 606. See Note 2 for additional information on cost recovery mechanisms.
(b)
See Note 1 under " Revenues " for additional information on alternative revenue programs at the natural gas distribution utilities. Alternative revenue program revenues are presented net of any previously recognized program amounts billed to customers during the same accounting period.
(c)
Wholesale energy revenues include $299 million of revenues accounted for as derivatives, primarily related to short-term physical energy sales in the wholesale electricity market. See Note 1 under " Revenues Southern Power " and Note 14 for additional information on energy-related derivative contracts.
(d)
Wholesale energy and wholesale capacity revenues include $384 million and $121 million , respectively, of PPA contracts accounted for as leases.
(e)
Other natural gas revenues related to Southern Company Gas' energy and risk management activities are presented net of the related costs of those activities and include gross third-party revenues of $7.0 billion of which $3.9 billion relates to contracts that are accounted for as derivatives. See Note 16 under " Southern Company Gas " for additional information on the components of wholesale gas services operating revenues.
(f)
Other revenues include $322 million of revenues not accounted for under ASC 606.

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2018
 
Alabama
Power
Georgia
Power
Mississippi Power
 
(in millions)
Operating revenues
 
 
 
Retail revenues (a)(b)
 
 
 
Residential
$
2,335

$
3,301

$
273

Commercial
1,578

3,023

286

Industrial
1,428

1,344

321

Other
26

84

9

Total retail electric revenues
$
5,367

$
7,752

$
889

Wholesale energy revenues (c)
297

133

348

Wholesale capacity revenues
101

54

6

Other revenues (b)(d)
267

481

22

Total operating revenues
$
6,032

$
8,420

$
1,265

(a)
Retail revenues at Alabama Power, Georgia Power, and Mississippi Power include a net increase or (net reduction) of $152 million , $(19) million , and $(13) million , respectively, related to certain cost recovery mechanisms that are not accounted for as revenue under ASC 606. See Note 2 for additional information on cost recovery mechanisms.
(b)
Retail revenues and other revenues at Georgia Power include $74 million and $135 million , respectively, of revenues accounted for as leases.
(c)
Wholesale energy revenues at Alabama Power, Georgia Power, and Mississippi Power include $20 million , $29 million , and $4 million , respectively, accounted for as derivatives primarily related to short-term physical energy sales in the wholesale electricity market. See Note 14 for additional information on energy-related derivative contracts.
(d)
Other revenues at Alabama Power and Georgia Power include $57 million and $109 million , respectively, of revenues not accounted for under ASC 606.
 
2018
 
(in millions)
Southern Power
 
PPA capacity revenues (a)
$
580

PPA energy revenues (a)
1,140

Non-PPA revenues (b)
472

Other revenues
13

Total operating revenues
$
2,205

(a)
PPA capacity revenues and PPA energy revenues include $186 million and $413 million , respectively, related to PPAs accounted for as leases. See Note 1 under " Revenues Southern Power " for additional information on capacity revenues accounted for as leases.
(b)
Non-PPA revenues include $242 million of revenues from short-term sales related to physical energy sales in the wholesale electricity market accounted for as derivatives. See Note 1 under " Revenues Southern Power " and Note 14 for additional information on energy-related derivative contracts.

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2018
 
(in millions)
Southern Company Gas
 
Operating revenues
 
Natural gas distribution revenues
 
Residential
$
1,525

Commercial
436

Transportation
944

Industrial
40

Other
230

Alternative revenue programs (a)
(20
)
Total natural gas distribution revenues
$
3,155

Gas pipeline investments
32

Wholesale gas services (b)
101

Gas marketing services (c)
568

Other revenues
53

Total operating revenues
$
3,909

(a)
See Note 1 under " Revenues Southern Company Gas " for additional information on alternative revenue programs at the natural gas distribution utilities. Alternative revenue program revenues are presented net of any previously recognized program amounts billed to customers during the same accounting period.
(b)
Wholesale gas services revenues are presented net of the related costs associated with its energy trading and risk management activities. Operating revenues, as presented, include gross third-party revenues of $7.0 billion of which $3.9 billion relates to contracts that are accounted for as derivatives. See Note 16 under " Southern Company Gas " for additional information on the components of wholesale gas services operating revenues and Note 14 for additional information on energy-related derivative contracts.
(c)
Gas marketing services includes $3 million of revenues not accounted for under ASC 606.
Contract Balances
The following table reflects the closing balances of receivables, contract assets, and contract liabilities related to revenues from contracts with customers at December 31, 2018 :
 
Receivables
 
Contract Assets
 
Contract Liabilities
 
(in millions)
Southern Company
$
2,630

 
$
102

 
$
32

Alabama Power
520

 

 
12

Georgia Power
721

 
58

 
7

Mississippi Power
100

 

 

Southern Power
118

 

 
11

Southern Company Gas
952

 

 
2

As of December 31, 2018 , Alabama Power had contract liabilities for outstanding performance obligations primarily related to extended service agreements. Georgia Power had contract assets primarily related to fixed retail customer bill programs where the payment is contingent upon Georgia Power's continued performance and the customer's continued participation in the program over the one-year contract term and to unregulated service agreements where payment is contingent upon project completion. Georgia Power also had contract liabilities for outstanding performance obligations primarily related to unregulated service agreements. Southern Power's contract liabilities relate to collections recognized in advance of revenue for certain levelized PPAs with Georgia Power. Southern Company's unregulated distributed generation business had $39 million and $11 million of contract assets and contract liabilities, respectively, at December 31, 2018 remaining for outstanding performance obligations.

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Remaining Performance Obligations
The traditional electric operating companies and Southern Power have long-term contracts with customers in which revenues are recognized as performance obligations are satisfied over the contract term. These contracts primarily relate to PPAs whereby the traditional electric operating companies and Southern Power provide electricity and generation capacity to a customer. The revenue recognized for the delivery of electricity is variable; however, certain PPAs include a fixed payment for fixed generation capacity over the term of the contract. Southern Company's unregulated distributed generation business also has partially satisfied performance obligations related to certain fixed price contracts. Revenues from contracts with customers related to these performance obligations remaining at December 31, 2018 are expected to be recognized as follows:
 
2019
2020
2021
2022
2023
2024 and
Thereafter
 
(in millions)
Southern Company (*)
$
487

$
341

$
315

$
315

$
306

$
2,103

Alabama Power
23

22

26

23

22

140

Georgia Power
41

38

40

30

31

82

Mississippi Power
3

3

1




Southern Power
323

295

270

281

275

2,028

(*)
Excludes amounts related to held for sale assets. See Note 15 under " Southern Company's Sale of Gulf Power " for additional information.
5 . PROPERTY, PLANT, AND EQUIPMENT
Property, plant, and equipment is stated at original cost or fair value at acquisition, as appropriate, less any regulatory disallowances and impairments. Original cost may include: materials; labor; minor items of property; appropriate administrative and general costs; payroll-related costs such as taxes, pensions, and other benefits; and the interest capitalized and/or cost of equity funds used during construction.

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The registrants' property, plant, and equipment in service consisted of the following at December 31, 2018 and 2017 :
At December 31, 2018:
Southern Company
Alabama Power
Georgia Power
Mississippi Power
Southern Power
Southern Company Gas

(in millions)
Electric utilities:


 
 
 
 
 
Generation
$
52,324

$
16,533

$
19,145

$
2,849

$
13,246

$

Transmission
11,344

4,380

6,156

769



Distribution
18,746

7,389

10,389

968



General/other
4,446

2,100

1,985

314

25


Electric utilities' plant in service
86,860

30,402

37,675

4,900

13,271


Southern Company Gas:


 
 
 
 
 
Natural gas distribution utilities transportation and distribution
12,409





12,409

Storage facilities
1,640





1,640

Other
1,128





1,128

Southern Company Gas plant in service
15,177





15,177

Other plant in service
1,669






Total plant in service
$
103,706

$
30,402

$
37,675

$
4,900

$
13,271

$
15,177

At December 31, 2017:
Southern Company
Alabama Power
Georgia Power
Mississippi Power
Southern Power
Southern Company Gas
 
(in millions)
Electric utilities:
 
 
 
 
 
 
Generation
$
51,279

$
14,213

$
17,038

$
2,801

$
13,737

$

Transmission
11,562

4,119

5,947

737



Distribution
19,239

7,034

9,978

946



General/other
4,402

1,960

1,898

289

18


Electric utilities' plant in service
86,482

27,326

34,861

4,773

13,755


Southern Company Gas:
 
 
 
 


 
Natural gas distribution utilities transportation and distribution
13,079





13,079

Storage facilities
1,599





1,599

Other
1,155





1,155

Southern Company Gas plant in service
15,833





15,833

Other plant in service
1,227






Total plant in service
$
103,542

$
27,326

$
34,861

$
4,773

$
13,755

$
15,833

The cost of replacements of property, exclusive of minor items of property, is capitalized. The cost of maintenance, repairs, and replacement of minor items of property is charged to other operations and maintenance expenses as incurred or performed with the exception of nuclear refueling costs and certain maintenance costs including those described below.
In accordance with orders from their respective state PSCs, Alabama Power and Georgia Power defer nuclear outage operations and maintenance expenses to a regulatory asset when the charges are incurred. Alabama Power amortizes the costs over a subsequent 18 -month period with Plant Farley's fall outage cost amortization beginning in January of the following year and spring outage cost amortization beginning in July of the same year. Georgia Power amortizes its costs over each unit's operating cycle, or 18 months for Plant Vogtle Units 1 and 2 and 24 months for Plant Hatch Units 1 and 2.

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A portion of Mississippi Power's railway track maintenance costs is charged to fuel stock and recovered through Mississippi Power's fuel clause.
The portion of Southern Company Gas' non-working gas used to maintain the structural integrity of natural gas storage facilities that is considered to be non-recoverable is recorded as depreciable property, plant, and equipment, while the recoverable or retained portion is recorded as non-depreciable property, plant, and equipment.
Capital Leases
Assets acquired under a capital lease are included in property, plant, and equipment and are further detailed in the table below for the applicable registrants:
 
Southern Company
Georgia
Power
 
(in millions)
At December 31, 2018:
 
 
Office buildings
$
216

$
61

PPAs (*)

144

Computer-related equipment
43


Gas pipeline
7


Less: Accumulated amortization
(75
)
(84
)
Balance, net of amortization
$
191

$
121

 
 
 
At December 31, 2017:
 
 
Office buildings
$
216

$
61

PPAs (*)

144

Computer-related equipment
51


Gas pipeline
6


Less: Accumulated amortization
(72
)
(68
)
Balance, net of amortization
$
201

$
137

(*)
Represents Georgia Power's affiliate PPAs with Southern Power. See Note 1 under " Affiliate Transactions " and Note 9 under " Fuel and Power Purchase Agreements Affiliate " for additional information.
See Note 8 under " Long-term Debt Capital Leases " for additional information.
Depreciation and Amortization
The traditional electric operating companies' and Southern Company Gas' depreciation of the original cost of utility plant in service is provided primarily by using composite straight-line rates. The approximate rates for 2018 , 2017 , and 2016 are as follows:
 
2018
2017
2016
 
(percent)
Alabama Power
3.0
%
2.9
%
3.0
%
Georgia Power
2.6
%
2.7
%
2.8
%
Mississippi Power (*)
4.1
%
3.7
%
4.2
%
Southern Company Gas
2.9
%
2.9
%
2.8
%
(*)
Mississippi Power's decrease in 2017 is primarily the result of recording a loss on its lignite mine in June 2017.
Depreciation studies are conducted periodically to update the composite rates. These studies are filed with the respective state PSC and/or other applicable state and federal regulatory agencies for the traditional electric operating companies and natural gas distribution utilities. In 2016, Alabama Power submitted an updated depreciation study to the FERC and received authorization to use the recommended rates beginning January 2017. The study was also provided to the Alabama PSC.

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Under the terms of the 2013 ARP, Georgia Power amortized approximately $14 million annually from 2014 through 2016 of its remaining regulatory liability related to other cost of removal obligations.
Southern Company's 2017 depreciation includes $34 million of reductions in depreciation recognized by Gulf Power under the terms of its 2013 rate case settlement agreement with the Florida PSC.
When property, plant, and equipment subject to composite depreciation is retired or otherwise disposed of in the normal course of business, its original cost, together with the cost of removal, less salvage, is charged to accumulated depreciation. For other property dispositions, the applicable cost and accumulated depreciation are removed from the balance sheet accounts, and a gain or loss is recognized. Minor items of property included in the original cost of the asset are retired when the related property unit is retired.
At December 31, 2018 and 2017 , accumulated depreciation for utility plant in service totaled $30.3 billion and $30.8 billion , respectively, for Southern Company and $4.3 billion and $4.5 billion , respectively, for Southern Company Gas.
Depreciation of the original cost of other plant in service is provided primarily on a straight-line basis over estimated useful lives, which for Southern Company range up to 65 years and for Southern Company Gas range from five to 15 years for transportation equipment, 40 to 60 years for storage facilities, and up to 65 years for other assets. At December 31, 2018 and 2017 , accumulated depreciation for other plant in service totaled $766 million and $673 million , respectively, for Southern Company and $129 million and $75 million , respectively, for Southern Company Gas.
Southern Power
Southern Power applies component depreciation, where depreciation is computed principally by the straight-line method over the estimated useful life of the asset. Certain of Southern Power's generation assets related to natural gas-fired facilities are depreciated on a units-of-production basis, using hours or starts, to better match outage and maintenance costs to the usage of, and revenues from, these assets. The primary assets in Southern Power's property, plant, and equipment are generating facilities, which generally have estimated useful lives as follows:
Southern Power Generating Facility
Useful life
Natural gas
Up to 45 years
Biomass
Up to 40 years
Solar
Up to 35 years
Wind
Up to 30 years
Southern Power reviews its estimated useful lives and salvage values on an ongoing basis. The results of these reviews could result in changes which could have a material impact on Southern Power's net income in the near term.
When Southern Power's depreciable property, plant, and equipment is retired, or otherwise disposed of in the normal course of business, the applicable cost and accumulated depreciation is removed and a gain or loss is recognized in the statements of income.

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Joint Ownership Agreements
At December 31, 2018 , the registrants' percentage ownership and investment (exclusive of nuclear fuel) in jointly-owned facilities in commercial operation were as follows:
Facility (Type)
Percent
Ownership
 
Plant in Service
 
Accumulated
Depreciation
 
CWIP
 
 
 
(in millions)
Alabama Power
 
 
 
 
 
 
 
Greene County (natural gas) Units 1 and 2
60.0
%
(a)  
$
274

 
$
71

 
$
1

Plant Miller (coal) Units 1 and 2
91.8

(b)  
2,056

 
619

 
138

 
 
 
 
 
 
 
 
Georgia Power
 
 
 
 
 
 
 
Plant Hatch (nuclear)
50.1
%
(c)  
$
1,569

 
$
615

 
$
54

Plant Vogtle (nuclear) Units 1 and 2
45.7

(c)  
3,804

 
2,150

 
84

Plant Scherer (coal) Units 1 and 2
8.4

(c)  
266

 
96

 
14

Plant Scherer (coal) Unit 3
75.0

(c)  
1,238

 
493

 
66

Plant Wansley (coal)
53.5

(c)  
1,179

 
362

 
160

Rocky Mountain (pumped storage)
25.4

(d)  
184

 
135

 

 
 
 
 
 
 
 
 
Mississippi Power
 
 
 
 
 
 
 
Greene County (natural gas) Units 1 and 2
40.0
%
(a)  
$
180

 
$
93

 
$
1

Plant Daniel (coal) Units 1 and 2
50.0

(e)  
723

 
201

 
7

 
 
 
 
 
 
 
 
Southern Company Gas
 
 
 
 
 
 
 
Dalton Pipeline (natural gas pipeline)
50.0
%
(f)  
$
270

 
$
6

 
$

(a)
Jointly owned by Alabama Power and Mississippi Power and operated and maintained by Alabama Power.
(b)
Jointly owned with PowerSouth and operated and maintained by Alabama Power.
(c)
Georgia Power owns undivided interests in Plants Hatch, Vogtle Units 1 and 2, Scherer, and Wansley in varying amounts jointly with one or more of the following entities: OPC, MEAG Power, Dalton, Florida Power & Light Company, JEA, and Gulf Power. Georgia Power has been contracted to operate and maintain the plants as agent for the co-owners and is jointly and severally liable for third party claims related to these plants.
(d)
Jointly owned with OPC, which is the operator of the plant.
(e)
Jointly owned by Gulf Power and Mississippi Power. In accordance with the operating agreement, Mississippi Power acts as Gulf Power's agent with respect to the operation and maintenance of these units.
(f)
Jointly owned with The Williams Companies, Inc. The Dalton Pipeline is a 115 -mile natural gas pipeline that serves as an extension of the Transco natural gas pipeline system into northwest Georgia. Southern Company Gas also entered into an agreement to lease its 50% undivided ownership in the Dalton Pipeline that became effective when it was placed in service in August 2017. Under the lease, Southern Company Gas will receive approximately $26 million annually for an initial term of 25 years . The lessee is responsible for maintaining the pipeline during the lease term and for providing service to transportation customers under its FERC-regulated tariff.
Georgia Power also owns 45.7% of Plant Vogtle Units 3 and 4, which are currently under construction and had a CWIP balance of $4.5 billion at December 31, 2018 . See Note 2 under " Georgia Power Nuclear Construction " for additional information.
On December 4, 2018, Southern Power completed the sale of its 65% ownership interest in Plant Stanton Unit A, which Southern Power previously jointly-owned with OUC, the FMPA, and the KUA, to NextEra Energy. See Note 15 under " Southern Power Sales of Natural Gas Plants " for additional information.
In conjunction with Southern Company's sale of Gulf Power, Mississippi Power and Gulf Power have committed to seek a restructuring of their 50% undivided ownership interests in Plant Daniel such that each of them would, after the restructuring, own 100% of a generating unit. On January 15, 2019, Gulf Power provided notice to Mississippi Power that Gulf Power will retire its share of the generating capacity of Plant Daniel on January 15, 2024. Mississippi Power has the option to purchase Gulf Power's ownership interest for $1 on January 15, 2024, provided that Mississippi Power exercises the option no later than 120 days prior to that date. Mississippi Power is assessing the potential operational and economic effects of Gulf Power's notice. The ultimate outcome of these matters remains subject to completion of Mississippi Power's evaluations and applicable regulatory

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approvals, including the FERC and the Mississippi PSC, and cannot now be determined. See Note 15 under " Southern Company's Sale of Gulf Power " for information regarding the sale of Gulf Power.
The registrants' proportionate share of their jointly-owned facility operating expenses is included in the corresponding operating expenses in the statements of income and each registrant is responsible for providing its own financing.
Assets Subject to Lien
On October 2, 2018, the Mississippi PSC approved executed agreements between Mississippi Power and its largest retail customer, Chevron Products Company (Chevron) , for Mississippi Power to continue providing retail service to the Chevron refinery in Pascagoula, Mississippi through 2038. The agreements grant Chevron a security interest in the co-generation assets, with a net book value of approximately $101 million at December 31, 2018 , located at the refinery that is exercisable upon the occurrence of (i) certain bankruptcy events or (ii) other events of default coupled with specific reductions in steam output at the facility and a downgrade of Mississippi Power's credit rating to below investment grade by two of the three rating agencies.
Under the terms of the PPA and the expansion PPA for Southern Power's Plant Mankato, which was acquired in 2016, approximately $563 million of assets, primarily related to property, plant, and equipment, are subject to lien at December 31, 2018 . See Note 15 under " Southern Power Sales of Natural Gas Plants " for additional information regarding the proposed sale of Plant Mankato.
See Note 3 under " General Litigation Matters Southern Power " for information regarding liens on Southern Power's Roserock facility.
See Note 8 under " Secured Debt " for information regarding debt secured by certain assets of Georgia Power, Mississippi Power, and Southern Company Gas.
6 . ASSET RETIREMENT OBLIGATIONS
AROs are computed as the present value of the estimated costs for an asset's future retirement and are recorded in the period in which the liability is incurred. The estimated costs are capitalized as part of the related long-lived asset and depreciated over the asset's useful life. In the absence of quoted market prices, AROs are estimated using present value techniques in which estimates of future cash outlays associated with the asset retirements are discounted using a credit-adjusted risk-free rate. Estimates of the timing and amounts of future cash outlays are based on projections of when and how the assets will be retired and the cost of future removal activities. Each traditional electric operating company and natural gas distribution utility has received accounting guidance from its state PSC or applicable state regulatory agency allowing the continued accrual or recovery of other retirement costs for long-lived assets that it does not have a legal obligation to retire. Accordingly, the accumulated removal costs for these obligations are reflected in the balance sheets as regulatory liabilities and amounts to be recovered are reflected in the balance sheets as regulatory assets.
The ARO liabilities for the traditional electric operating companies primarily relate to facilities that are subject to the CCR Rule, principally ash ponds. In addition, Alabama Power and Georgia Power have retirement obligations related to the decommissioning of nuclear facilities (Alabama Power's Plant Farley and Georgia Power's ownership interests in Plant Hatch and Plant Vogtle Units 1 and 2). See " Nuclear Decommissioning " herein for additional information. The traditional electric operating companies also have AROs related to various landfill sites, asbestos removal, and underground storage tanks, as well as, for Alabama Power, disposal of polychlorinated biphenyls in certain transformers and sulfur hexafluoride gas in certain substation breakers, for Georgia Power, gypsum cells, and for Mississippi Power, mine reclamation and water wells. The ARO liability for Southern Power primarily relates to Southern Power's solar and wind facilities, which are located on long-term land leases requiring the restoration of land at the end of the lease.
The traditional electric operating companies and Southern Company Gas also have identified other retirement obligations, such as obligations related to certain electric transmission and distribution facilities, certain asbestos containing material within long-term assets not subject to ongoing repair and maintenance activities, certain wireless communication towers, the disposal of polychlorinated biphenyls in certain transformers, leasehold improvements, equipment on customer property, and property associated with the Southern Company system's rail lines and natural gas pipelines. However, liabilities for the removal of these assets have not been recorded because the settlement timing for certain retirement obligations related to these assets is indeterminable and, therefore, the fair value of the retirement obligations cannot be reasonably estimated. A liability for these retirement obligations will be recognized when sufficient information becomes available to support a reasonable estimation of the ARO.
Southern Company and the traditional electric operating companies will continue to recognize in their respective statements of income allowed removal costs in accordance with regulatory treatment. Any differences between costs recognized in accordance

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with accounting standards related to asset retirement and environmental obligations and those reflected in rates are recognized as either a regulatory asset or liability in the balance sheets as ordered by the various state PSCs.
Details of the AROs included in the balance sheets are as follows:
 
Southern Company
Alabama Power
Georgia Power
Mississippi Power
Southern Power
 
(in millions)
Balance at December 31, 2016
$
4,514

$
1,533

$
2,532

$
179

$
64

Liabilities incurred
16


4


6

Liabilities settled
(177
)
(26
)
(120
)
(23
)

Accretion
179

77

89

5

4

Cash flow revisions
292

125

133

13

4

Balance at December 31, 2017
$
4,824

$
1,709

$
2,638

$
174

$
78

Liabilities incurred
29


27


2

Liabilities settled
(244
)
(55
)
(116
)
(35
)

Accretion
217

106

94

5

4

Cash flow revisions
4,737

1,450

3,186

16


Reclassification to held for sale
(169
)




Balance at December 31, 2018
$
9,394

$
3,210

$
5,829

$
160

$
84

In June 2018, Alabama Power recorded an increase of approximately $1.2 billion to its AROs related to the CCR Rule. Mississippi Power also recorded an increase of approximately $11 million to its AROs related to an ash pond at Plant Greene County, which is jointly-owned with Alabama Power. The revised cost estimates were based on information from feasibility studies performed on ash ponds in use at plants operated by Alabama Power, including Plant Greene County. During the second quarter 2018, Alabama Power's management completed its analysis of these studies which indicated that additional closure costs, primarily related to increases in estimated ash volume, water management requirements, and design revisions, will be required to close these ash ponds under the planned closure-in-place methodology. As the level of work becomes more defined in the next 12 months, it is likely that these cost estimates will change and the change could be material.
In December 2018, Georgia Power recorded an increase of approximately $3.1 billion to its AROs related to the CCR Rule and the related state rule. During the second half of 2018, Georgia Power completed a strategic assessment related to its plans to close the ash ponds at all of its generating plants in compliance with the CCR Rule and the related state rule. This assessment included engineering and constructability studies related to design assumptions for ash pond closures and advanced engineering methods. The results indicated that additional closure costs will be required to close these ash ponds, primarily due to changes in closure strategies, the estimated amount of ash to be excavated, and additional water management requirements necessary to support closure strategies. These factors also impact the estimated timing of future cash outlays.
In June 2018, Alabama Power completed an updated decommissioning cost site study for Plant Farley. The estimated cost of decommissioning based on the study resulted in an increase in Alabama Power's ARO liability of approximately $300 million . In December 2018, Georgia Power completed updated decommissioning cost site studies for Plant Hatch and Plant Vogtle Units 1 and 2. The estimated cost of decommissioning based on the studies resulted in an increase in Georgia Power's ARO liability of approximately $130 million . See " Nuclear Decommissioning " below for additional information.
The 2018 reclassification of a portion of the ARO liability to liabilities held for sale by Southern Company represents the AROs related to Gulf Power. See Note 15 under " Southern Company's Sale of Gulf Power " and " Assets Held for Sale " for additional information.
In 2017 , Alabama Power's and Georgia Power's cash flow revisions were primarily related to changes in closure strategy for ash ponds and landfills. Georgia Power's cash flow revisions in 2017 also related to changes in closure strategy for gypsum cells. Mississippi Power's cash flow revisions in 2017 primarily related to a revision in the closure date of its lignite mine. The liabilities settled in 2017 for Alabama Power, Georgia Power, and Mississippi Power were primarily related to ash pond closure activity.
The cost estimates for AROs related to the CCR Rule are based on information at December 31, 2018 using various assumptions related to closure and post-closure costs, timing of future cash outlays, inflation and discount rates, and the potential methods for

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complying with the CCR Rule requirements for closure. The traditional electric operating companies expect to continue to periodically update their ARO cost estimates, which could increase further, as additional information becomes available. Absent continued recovery of ARO costs through regulated rates, Southern Company's and the traditional electric operating companies' results of operations, cash flows, and financial condition could be materially impacted. The ultimate outcome of this matter cannot be determined at this time.
Nuclear Decommissioning
The NRC requires licensees of commercial nuclear power reactors to establish a plan for providing reasonable assurance of funds for future decommissioning. Alabama Power and Georgia Power have external trust funds (Funds) to comply with the NRC's regulations. Use of the Funds is restricted to nuclear decommissioning activities. The Funds are managed and invested in accordance with applicable requirements of various regulatory bodies, including the NRC, the FERC, and state PSCs, as well as the IRS. While Alabama Power and Georgia Power are allowed to prescribe an overall investment policy to the Funds' managers, neither Southern Company nor its subsidiaries or affiliates are allowed to engage in the day-to-day management of the Funds or to mandate individual investment decisions. Day-to-day management of the investments in the Funds is delegated to unrelated third-party managers with oversight by the management of Alabama Power and Georgia Power. The Funds' managers are authorized, within certain investment guidelines, to actively buy and sell securities at their own discretion in order to maximize the return on the Funds' investments. The Funds are invested in a tax-efficient manner in a diversified mix of equity and fixed income securities and are reported as trading securities.
Alabama Power and Georgia Power record the investment securities held in the Funds at fair value, as disclosed in Note 13 , as management believes that fair value best represents the nature of the Funds. Gains and losses, whether realized or unrealized, are recorded in the regulatory liability for AROs in the balance sheets and are not included in net income or OCI. Fair value adjustments and realized gains and losses are determined on a specific identification basis.
The Funds at Georgia Power participate in a securities lending program through the managers of the Funds. Under this program, Georgia Power's Funds' investment securities are loaned to institutional investors for a fee. Securities loaned are fully collateralized by cash, letters of credit, and/or securities issued or guaranteed by the U.S. government or its agencies or instrumentalities. At December 31, 2018 and 2017 , approximately $27 million and $76 million , respectively, of the fair market value of Georgia Power's Funds' securities were on loan and pledged to creditors under the Funds' managers' securities lending program. The fair value of the collateral received was approximately $28 million and $77 million at December 31, 2018 and 2017 , respectively, and can only be sold by the borrower upon the return of the loaned securities. The collateral received is treated as a non-cash item in the statements of cash flows.
Investment securities in the Funds for December 31, 2018 and 2017 were as follows:
 
Southern Company
Alabama
Power
Georgia
Power
 
(in millions)
At December 31, 2018:
 
 
 
Equity securities
$
919

$
594

$
325

Debt securities
726

201

525

Other securities
74

51

23

Total investment securities in the Funds
$
1,719

$
846

$
873

 
 
 
 
At December 31, 2017:
 
 
 
Equity securities
$
1,059

$
644

$
415

Debt securities
725

223

502

Other securities
47

35

12

Total investment securities in the Funds
$
1,831

$
902

$
929

These amounts exclude receivables related to investment income and pending investment sales and payables related to pending investment purchases. For Southern Company and Georgia Power, these amounts include Georgia Power's investment securities pledged to creditors and collateral received and excludes payables related to Georgia Power's securities lending program.

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Southern Company and Subsidiary Companies 2018 Annual Report

The fair value increases (decreases) of the Funds, including reinvested interest and dividends and excluding the Funds' expenses, for 2018 , 2017 , and 2016 are shown in the table below. The fair value increases (decreases) included unrealized gains (losses) on securities held in the Funds at each of December 31, 2018 , 2017 , and 2016 , which are also shown in the table below.
 
Southern Company
Alabama
Power
Georgia
Power
 
(in millions)
Fair value increases (decreases)
 
 
 
2018
$
(67
)
$
(38
)
$
(29
)
2017
233

125

108

2016
114

76

38

 
 
 
 
Unrealized gains (losses)
 
 
 
At December 31, 2018
$
(183
)
$
(96
)
$
(87
)
At December 31, 2017
181

98

83

At December 31, 2016
48

34

14

The investment securities held in the Funds continue to be managed with a long-term focus. Accordingly, all purchases and sales within the Funds are presented separately in the statements of cash flows as investing cash flows, consistent with the nature of the securities and purpose for which the securities were acquired.
For Alabama Power, approximately $17 million and $18 million at December 31, 2018 and 2017 , respectively, previously recorded in internal reserves is being transferred into the Funds through 2040 as approved by the Alabama PSC. The NRC's minimum external funding requirements are based on a generic estimate of the cost to decommission only the radioactive portions of a nuclear unit based on the size and type of reactor. Alabama Power and Georgia Power have filed plans with the NRC designed to ensure that, over time, the deposits and earnings of the Funds will provide the minimum funding amounts prescribed by the NRC.
At December 31, 2018 and 2017 , the accumulated provisions for the external decommissioning trust funds were as follows:
 
2018
 
2017
 
(in millions)
Alabama Power
 
 
 
Plant Farley
$
846

 
$
902

 
 
 
 
Georgia Power
 
 
 
Plant Hatch
$
547

 
$
583

Plant Vogtle Units 1 and 2
326

 
346

Total
$
873

 
$
929


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Site study cost is the estimate to decommission a specific facility as of the site study year. The decommissioning cost estimates are based on prompt dismantlement and removal of the plant from service. The actual decommissioning costs may vary from these estimates because of changes in the assumed date of decommissioning, changes in NRC requirements, or changes in the assumptions used in making these estimates. The estimated costs of decommissioning at December 31, 2018 based on the most current studies, which were each performed in 2018, were as follows:
 
Plant
Farley
 
Plant
  Hatch (*)
 
Plant Vogtle
 Units 1 and 2 (*)
Decommissioning periods:
 
 
 
 
 
Beginning year
2037

 
2034

 
2047

Completion year
2076

 
2075

 
2079

 
(in millions)
Site study costs:
 
 
 
 
 
Radiated structures
$
1,234

 
$
734

 
$
601

Spent fuel management
387

 
172

 
162

Non-radiated structures
99

 
56

 
79

Total site study costs
$
1,720

 
$
962

 
$
842

(*)
Based on Georgia Power's ownership interests.
For ratemaking purposes, Alabama Power's decommissioning costs are based on the site study and Georgia Power's decommissioning costs are based on the NRC generic estimate to decommission the radioactive portion of the facilities and the site study estimate for spent fuel management as of 2012. Significant assumptions used to determine these costs for ratemaking were an estimated inflation rate of 4.5% and 2.4% for Alabama Power and Georgia Power, respectively, and an estimated trust earnings rate of 7.0% and 4.4% for Alabama Power and Georgia Power, respectively.
Amounts previously contributed to the Funds for Plant Farley are currently projected to be adequate to meet the decommissioning obligations. Alabama Power will continue to provide site-specific estimates of the decommissioning costs and related projections of funds in the external trust to the Alabama PSC and, if necessary, would seek the Alabama PSC's approval to address any changes in a manner consistent with NRC and other applicable requirements.
Under the 2013 ARP, the Georgia PSC approved Georgia Power's annual decommissioning cost for ratemaking of $4 million and $2 million for Plant Hatch and Plant Vogtle Units 1 and 2, respectively. Georgia Power expects the Georgia PSC to review and adjust, if necessary, the amounts collected in rates for nuclear decommissioning costs in the Georgia Power 2019 Base Rate Case.
7 . CONSOLIDATED ENTITIES AND EQUITY METHOD INVESTMENTS
The registrants may hold ownership interests in a number of business ventures with varying ownership structures. Partnership interests and other variable interests are evaluated to determine if each entity is a VIE. If a venture is a VIE for which a registrant is the primary beneficiary, the assets, liabilities, and results of operations of the entity are consolidated. The registrants reassess the conclusion as to whether an entity is a VIE upon certain occurrences, which are deemed reconsideration events.
For entities that are not determined to be VIEs, the registrants evaluate whether they have control or significant influence over the investee to determine the appropriate consolidation and presentation. Generally, entities under the control of a registrant are consolidated, and entities over which a registrant can exert significant influence, but which a registrant does not control, are accounted for under the equity method of accounting. However, the registrants may also invest in partnerships and limited liability companies that maintain separate ownership accounts. All such investments are required to be accounted for under the equity method unless the interest is so minor that there is virtually no influence over operating and financial policies, as are all investments in joint ventures.
Investments accounted for under the equity method are recorded within equity investments in unconsolidated subsidiaries in the balance sheets and, for Southern Company and Southern Company Gas, the equity income is recorded within earnings from equity method investments in the statements of income. See " SEGCO " and " Southern Company Gas " herein for additional information.

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SEGCO
Alabama Power and Georgia Power own equally all of the outstanding capital stock of SEGCO, which owns electric generating units with a total rated capacity of 1,020 MWs, as well as associated transmission facilities. Alabama Power and Georgia Power account for SEGCO using the equity method; Southern Company consolidates SEGCO. SEGCO uses natural gas as the primary fuel source for 1,000 MWs of its generating capacity. The capacity of these units is sold equally to Alabama Power and Georgia Power. Alabama Power and Georgia Power make payments sufficient to provide for the operating expenses, taxes, interest expense, and a ROE. The share of purchased power included in purchased power, affiliates in the statements of income totaled $102 million in 2018 , $76 million in 2017 , and $55 million in 2016 for Alabama Power and $105 million in 2018 , $78 million in 2017 , and $57 million in 2016 for Georgia Power.
SEGCO paid $18 million of dividends in 2018 and $24 million in each of 2017 and 2016 , of which one-half of each was paid to each of Alabama Power and Georgia Power. In addition, Alabama Power and Georgia Power each recognize 50% of SEGCO's net income.
Alabama Power, which owns and operates a generating unit adjacent to the SEGCO generating units, has a joint ownership agreement with SEGCO for the ownership of an associated gas pipeline. Alabama Power owns 14% of the pipeline with the remaining 86% owned by SEGCO.
See Note 9 under " Guarantees " for additional information regarding guarantees of Alabama Power and Georgia Power related to SEGCO.
Southern Power
Variable Interest Entities
Southern Power has certain wholly-owned subsidiaries that are determined to be VIEs. Southern Power is considered the primary beneficiary of these VIEs because it controls the most significant activities of the VIEs, including operating and maintaining the respective assets, and has the obligation to absorb expected losses of these VIEs to the extent of its equity interests.
SP Solar
On May 22, 2018, Southern Power sold a noncontrolling 33% limited partnership interest in SP Solar to Global Atlantic Financial Group Limited (Global Atlantic). See Note 15 under " Southern Power " for additional information. A wholly-owned subsidiary of Southern Power is the general partner and holds a 1% ownership interest in SP Solar and another wholly-owned subsidiary of Southern Power owns the remaining 66% ownership in SP Solar. SP Solar qualifies as a VIE since the arrangement is structured as a limited partnership and the 33% limited partner does not have substantive kick-out rights against the general partner. Southern Power previously consolidated SP Solar and will continue to do so as the primary beneficiary of the VIE since it controls the most significant activities of the partnership, including operating and maintaining its assets.
At December 31, 2018, SP Solar had total assets of $6.3 billion , total liabilities of $113 million , and noncontrolling interests of $1.2 billion . Cash distributions from SP Solar are allocated 67% to Southern Power and 33% to Global Atlantic in accordance with their partnership interest percentage. Under the terms of the limited partnership agreement, distributions without limited partner consent are limited to available cash and SP Solar is obligated to distribute all such available cash to its partners each quarter. Available cash includes all cash generated in the quarter subject to the maintenance of appropriate operating reserves.
Transfers and sales of the assets in the VIE are subject to limited partner consent and the liabilities do not have recourse to the general credit of Southern Power. Liabilities consist of customary working capital items and do not include any long-term debt.
SP Wind
On December 11, 2018, Southern Power sold a noncontrolling tax-equity interest in SP Wind to three financial investors. SP Wind owns eight operating wind farms. See Note 15 under " Southern Power " for additional information. Southern Power owns 100% of the class B membership interests and the three financial investors own 100% of the Class A membership interests. SP Wind qualifies as a VIE since the structure of the arrangement is similar to a limited partnership and the Class A members do not have substantive kick-out rights against Southern Power. Southern Power previously consolidated SP Wind and will continue to do so as the primary beneficiary of the VIE since it controls the most significant activities of the entity, including operating and maintaining its assets.
At December 31, 2018, SP Wind had total assets of $2.5 billion , total liabilities of $51 million , and noncontrolling interests of $47 million . Under the terms of the limited liability agreement, distributions without Class A member consent are limited to available cash and SP Wind is obligated to distribute all such available cash to its members each quarter. Available cash includes all cash

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generated in the quarter subject to the maintenance of appropriate operating reserves. Cash distributions from SP Wind are generally allocated 60% to Southern Power and 40% to the three financial investors in accordance with the limited liability agreement.
Transfers and sales of the assets in the VIE are subject to Class A member consent and the liabilities do not have recourse to the general credit of Southern Power. Liabilities consist of customary working capital items and do not include any long-term debt.
Redeemable Noncontrolling Interests
In April 2017, Southern Power reclassified approximately $114 million from redeemable noncontrolling interests to non-redeemable noncontrolling interests due to the expiration of an option allowing SunPower Corporation to require Southern Power to purchase its redeemable noncontrolling interest at fair market value. In addition, in October 2017, Turner Renewable Energy, LLC redeemed at fair value its 10% interest of redeemable noncontrolling interest in certain of Southern Power's solar facilities. At December 31, 2018 and 2017, there were no outstanding redeemable noncontrolling interests.
The following table presents the changes in Southern Power's redeemable noncontrolling interests for the years ended December 31, 2017 and 2016 :
 
2017
 
2016
 
(in millions)
Beginning balance
$
164

 
$
43

Net income attributable to redeemable noncontrolling interests
2

 
4

Distributions to redeemable noncontrolling interests
(2
)
 
(1
)
Capital contributions from redeemable noncontrolling interests
2

 
118

Redemption of redeemable noncontrolling interests
(59
)
 

Reclassification to non-redeemable noncontrolling interests
(114
)
 

Change in fair value of redeemable noncontrolling interests
7

 

Ending balance
$

 
$
164

The following table presents the attribution of net income to Southern Power and the noncontrolling interests for the years ended December 31, 2017 and 2016 :
 
2017
 
2016
 
(in millions)
Net income
$
1,117

 
$
374

Less: Net income attributable to noncontrolling interests
44

 
32

Less: Net income attributable to redeemable noncontrolling interests
2

 
4

Net income attributable to Southern Power
$
1,071

 
$
338

Southern Company Gas
SouthStar, previously a joint venture owned 85% by Southern Company Gas and 15% by Piedmont, was the only VIE for which Southern Company Gas was the primary beneficiary, prior to October 2016 when Southern Company Gas completed its purchase of Piedmont's remaining interest in SouthStar.
In 2015, Georgia Natural Gas Company (GNG), a 100% -owned, direct subsidiary of Southern Company Gas, notified Piedmont of its election, pursuant to a change in control of SouthStar, to purchase Piedmont's 15% interest in SouthStar at fair market value. This purchase was contingent upon the closing of the merger between Piedmont and Duke Energy Corporation (Duke Energy). In October 2016, after Piedmont and Duke Energy completed their merger, GNG completed its purchase of Piedmont's interest in SouthStar and paid a purchase price of $160 million and $15 million for Piedmont's share of SouthStar's 2016 earnings through the date of acquisition.
Southern Company Gas' cash flows used for financing activities included SouthStar's distribution to Piedmont for its portion of SouthStar's annual earnings from the previous year. For the successor period of July 1, 2016 through December 31, 2016 , SouthStar made a distribution of $15 million upon completion of the purchase of Piedmont's interest in SouthStar. For the predecessor period of January 1, 2016 through June 30, 2016 , SouthStar distributed $19 million to Piedmont.

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Equity Method Investments
The carrying amounts of Southern Company Gas' equity method investments at December 31, 2018 and 2017 and related income from those investments for the successor years ended December 31, 2018 and 2017 , the successor period of July 1, 2016 through December 31, 2016 , and the predecessor period of January 1, 2016 through June 30, 2016 were as follows:
Investment Balance
December 31, 2018
 
December 31, 2017
 
(in millions)
SNG
$
1,261

 
$
1,262

PennEast Pipeline
71

 
57

Atlantic Coast Pipeline
83

 
41

Other
123

 
117

Total
$
1,538

 
$
1,477

 
Successor
 
Predecessor
Earnings from Equity Method Investments
Year ended December 31, 2018
 
Year ended December 31, 2017
 
July 1, 2016 through December 31, 2016
 
 
January 1, 2016 through June 30, 2016
 
(in millions)
 
(in millions)
SNG
$
131

 
$
88

 
$
56

 
 
$

PennEast Pipeline
5

 
6

 

 
 

Atlantic Coast Pipeline
7

 
6

 
1

 
 

Other
5

 
6

 
3

 
 
2

Total
$
148

 
$
106

 
$
60

 
 
$
2

SNG
In 2016, Southern Company Gas, through a wholly-owned, indirect subsidiary, acquired a 50% equity interest in SNG, which is accounted for as an equity method investment. See Note 15 under " Southern Company Gas Investment in SNG " for additional information. Selected financial information of SNG at December 31, 2018 and 2017 and for the years ended December 31, 2018 and 2017 and for the period September 1, 2016 through December 31, 2016 is as follows:
 
At December 31,
Balance Sheet Information
2018
 
2017
 
(in millions)
Current assets
$
104

 
$
82

Property, plant, and equipment
2,606

 
2,439

Deferred charges and other assets
121

 
121

Total Assets
$
2,831

 
$
2,642

 
 
 
 
Current liabilities
$
103

 
$
110

Long-term debt
1,103

 
1,102

Other deferred charges and other liabilities
212

 
76

Total Liabilities
$
1,418

 
$
1,288

 
 
 
 
Total Stockholders' Equity
$
1,413

 
$
1,354

Total Liabilities and Stockholders' Equity
$
2,831

 
$
2,642


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Southern Company and Subsidiary Companies 2018 Annual Report

Income Statement Information
Year ended
December 31, 2018
 
Year ended
December 31, 2017
 
September 1, 2016
through December 31, 2016
 
(in millions)
Revenues
$
604

 
$
544

 
$
230

Operating income
310

 
242

 
137

Net income
261

 
175

 
115

Other Investments
Pipelines
In 2014, Southern Company Gas entered into a partnership in which it holds a 20% ownership interest in the PennEast Pipeline, an interstate pipeline company formed to develop and operate a 118 -mile natural gas pipeline between New Jersey and Pennsylvania. The initial transportation capacity of 1.0 Bcf per day, is under long-term contracts, mainly with public utilities and other market-serving entities, such as electric generation companies, in New Jersey, Pennsylvania, and New York.
Also in 2014, Southern Company Gas entered into a project in which it holds a 5% ownership interest in the Atlantic Coast Pipeline, an interstate pipeline company formed to develop and operate a 594 -mile natural gas pipeline in North Carolina, Virginia, and West Virginia with initial transportation capacity of 1.5 Bcf per day.
See Note 2 under "FERC Matters – Southern Company Gas" for additional information on these pipeline projects.
Pivotal JAX LNG, LLC
Southern Company Gas owns a 50% interest in a LNG liquefaction and storage facility in Jacksonville, Florida, which was placed in service in October 2018. This facility is outfitted with a 2.0 million gallon storage tank with the capacity to produce in excess of 120,000 gallons of LNG per day.

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8 . FINANCING
Securities Due Within One Year
A summary of long-term securities due within one year at each of December 31, 2018 and 2017 is as follows:
 
December 31, 2018
 
Southern Company
Alabama Power
Georgia
Power
Mississippi Power
Southern Power
Southern Company Gas
 
(in millions)
Senior notes
$
2,950

$
200

$
500

$

$
600

$
300

Revenue bonds (a)
173


108

40



First mortgage bonds
50





50

Capitalized leases
24

1

13




Other (b)
1


(4
)

(1
)
7

Total
$
3,198

$
201

$
617

$
40

$
599

$
357

(a)
For Southern Company and Mississippi Power, includes $40 million in pollution control revenue bonds classified as short term since they are variable rate demand obligations supported by short-term credit facilities; however, the final maturity dates range from 2020 to 2028.
(b)
Represents unamortized debt related amounts, acquisition accounting fair value adjustments, and/or fair value hedges. See Note 14 for additional information regarding fair value hedges.
 
December 31, 2017
 
Southern Company
Georgia
Power
Mississippi Power
Southern Power
Southern Company Gas
 
(in millions)
Senior notes
$
2,354

$
750

$

$
350

$
155

Long-term bank term loans
1,420

100

900

420


Revenue bonds (a)
90


90



Capitalized leases
31

11




Other (b)
(3
)
(4
)
(1
)

2

Total
$
3,892

$
857

$
989

$
770

$
157

(a)
For Southern Company and Mississippi Power, includes $50 million in revenue bonds classified as short term at December 31, 2017 that were remarketed in an index rate mode subsequent to December 31, 2017. Also for Southern Company and Mississippi Power, includes $40 million in pollution control revenue bonds classified as short term since they are variable rate demand obligations supported by short-term credit facilities; however, the final maturity dates range from 2020 to 2028.
(b)
Represents unamortized debt related amounts, acquisition accounting fair value adjustments, and fair value hedges. See Note 14 for additional information regarding fair value hedges.
Maturities of long-term debt for the next five years are as follows:
 
Southern Company (a)
Alabama Power
Georgia
Power (a)
Mississippi Power
Southern Power (b)
Southern Company
Gas
 
(in millions)
2019
$
3,156

$
200

$
621

$

$
600

$
350

2020
4,041

250

1,006

307

825


2021
3,186

310

375

270

300

330

2022
1,974

750

505


677

46

2023
2,388

300

153


290

400

(a)
Amounts include principal amortization related to the FFB borrowings beginning in 2020; however, the final maturity date is February 20, 2044. See " Long-term Debt DOE Loan Guarantee Borrowings " herein for additional information.
(b)
Southern Power's 2022 maturity represents euro-denominated debt at the U.S. dollar denominated hedge settlement amount.

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Long-term Debt
Senior Notes
Total senior notes (including amounts due within one year) outstanding at December 31, 2018 and 2017 were as follows:
 
Southern
Company
(a)
Alabama Power
Georgia
Power
Mississippi Power
Southern Power
Southern Company
 Gas (b)
 
(in millions)
December 31, 2018
$
32,725

$
6,875

$
5,600

$
1,200

$
5,050

$
4,000

December 31, 2017
35,148

6,375

7,100

755

5,459

4,157

(a)
Includes $10.0 billion and $10.2 billion of senior notes at the Southern Company parent entity at December 31, 2018 and 2017 , respectively.
(b)
Represents senior notes issued by Southern Company Gas Capital, which are fully and unconditionally guaranteed by Southern Company Gas. See " Structural Considerations " herein for additional information.
See Note 14 for information regarding fair value hedges of existing senior notes.
Except as otherwise described herein, Southern Company and its subsidiaries used the proceeds of 2018 senior note issuances for long-term debt redemptions and maturities, to repay short-term indebtedness, and for general corporate purposes, including working capital. The subsidiaries also used the proceeds for their construction programs.
In August 2018, Southern Company issued $750 million aggregate principal amount of Series 2018A Floating Rate Senior Notes due February 14, 2020 bearing interest based on three -month LIBOR.
Subsequent to December 31, 2018, through cash tender offers, Southern Company repurchased and retired approximately $522 million of the $1.0 billion aggregate principal amount outstanding of its 1.85% Senior Notes due July 1, 2019 ( 1.85% Notes), approximately $180 million of the $350 million aggregate principal amount outstanding of its Series 2014B 2.15% Senior Notes due September 1, 2019 (Series 2014B Notes), and approximately $504 million of the $750 million aggregate principal amount outstanding of its Series 2018A Floating Rate Notes due February 14, 2020 (Series 2018A Notes), for an aggregate purchase price, excluding accrued and unpaid interest, of approximately $1.2 billion . In addition, subsequent to December 31, 2018, and following the completion of the cash tender offers, Southern Company completed the redemption of all of the Series 2018A Notes remaining outstanding and called for redemption all of the 1.85% Notes and Series 2014B Notes remaining outstanding.
In June 2018, Alabama Power issued $500 million aggregate principal amount of Series 2018A 4.30% Senior Notes due July 15, 2048.
In April 2018, Georgia Power redeemed all $250 million aggregate principal amount of its Series 2008B 5.40% Senior Notes due June 1, 2018.
In May 2018, through cash tender offers, Georgia Power repurchased and retired $89 million of the $250 million aggregate principal amount outstanding of its Series 2007A 5.65% Senior Notes due March 1, 2037, $326 million of the $500 million aggregate principal amount outstanding of its Series 2009A 5.95% Senior Notes due February 1, 2039, and $335 million of the $600 million aggregate principal amount outstanding of its Series 2010B 5.40% Senior Notes due June 1, 2040, for an aggregate purchase price, excluding accrued and unpaid interest, of $902 million .
In March 2018, Mississippi Power issued $300 million aggregate principal amount of Series 2018A Floating Rate Senior Notes due March 27, 2020 bearing interest based on three -month LIBOR and $300 million aggregate principal amount of Series 2018B 3.95% Senior Notes due March 30, 2028.
In October 2018, Mississippi Power completed the redemption of all $30 million aggregate principal amount outstanding of its Series G 5.40% Senior Notes due July 1, 2035 and all $125 million aggregate principal amount outstanding of its Series 2009A 5.55% Senior Notes due March 1, 2019.

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Junior Subordinated Notes
Total junior subordinated notes outstanding for Southern Company and Georgia Power at December 31, 2018 and 2017 were as follows:
 
Southern
Company
(*)
Georgia
Power
 
(in millions)
December 31, 2018
$
3,570

$
270

December 31, 2017
3,570

270

(*)
Includes $3.3 billion of junior subordinated notes at the Southern Company parent entity at both December 31, 2018 and 2017 .
Pollution Control Revenue Bonds
Pollution control revenue bond obligations represent loans to the traditional electric operating companies from public authorities of funds derived from sales by such authorities of revenue bonds issued to finance pollution control and solid waste disposal facilities. In some cases, the pollution control revenue bond obligations represent obligations under installment sales agreements with respect to facilities constructed with the proceeds of revenue bonds issued by public authorities. The traditional electric operating companies are required to make payments sufficient for the authorities to meet principal and interest requirements of such bonds. Proceeds from certain issuances are restricted until qualifying expenditures are incurred. Total tax-exempt pollution control revenue bond obligations (including amounts due within one year) outstanding at December 31, 2018 and 2017 were as follows:
 
Southern
Company
Alabama
Power
Georgia
Power
Mississippi Power
 
(in millions)
December 31, 2018
$
2,585

$
1,060

$
1,460

$
40

December 31, 2017
3,297

1,060

1,821

83

In October 2018, Alabama Power purchased and held $120 million aggregate principal amount of The Industrial Development Board of the City of Mobile, Alabama Pollution Control Revenue Bonds (Alabama Power Company Plant Barry Project), Series 2008. Alabama Power reoffered these bonds to the public in November 2018.
During 2018, Georgia Power purchased and held the following pollution control revenue bonds, which may be reoffered to the public at a later date:
approximately $105 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), First Series 2013
$173 million aggregate principal amount of Development Authority of Bartow County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Bowen Project), First Series 2009
$55 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), Fifth Series 1994
$65 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), Second Series 2008
approximately $72 million aggregate principal amount of Development Authority of Bartow County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Bowen Project), First Series 2013
In December 2018, the Development Authority of Burke County (Georgia) issued approximately $108 million aggregate principal amount of Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), First Series 2018 due November 1, 2052 for the benefit of Georgia Power. The proceeds were used to redeem, in January 2019, approximately $13 million , $20 million , and $75 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), First Series 1992, Eighth Series 1994, and Second Series 1995, respectively.
In July 2018, Mississippi Power purchased and held approximately $43 million aggregate principal amount of Mississippi Business Finance Corporation Pollution Control Revenue Refunding Bonds, Series 2002. Mississippi Power may reoffer these bonds to the public at a later date.

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Southern Company and Subsidiary Companies 2018 Annual Report

Bank Term Loans
Total long-term bank term loans (including amounts due within one year) outstanding at December 31, 2018 and 2017 were as follows:
 
Southern
Company
Alabama Power
Georgia
Power
Mississippi Power
Southern Power
 
(in millions)
December 31, 2018
$
145

$
45

$

$

$

December 31, 2017
1,465

45

100

900

420

See " Notes Payable " herein for additional information regarding bank term loans.
In January 2018, Georgia Power repaid its outstanding $100 million floating rate bank loan due October 26, 2018.
In March 2018, Mississippi Power repaid at maturity a $900 million unsecured term loan.
In May 2018, Southern Power repaid $420 million aggregate principal amount of long-term floating rate bank loans.
In November 2018, SEGCO, as borrower, and Alabama Power, as guarantor, entered into a $100 million long-term delayed draw floating rate bank term loan bearing interest based on three-month LIBOR, which SEGCO used to repay at maturity $100 million aggregate principal amount of Series 2013A Senior Notes. See Note 9 under " Guarantees " for additional information.
DOE Loan Guarantee Borrowings
Pursuant to the loan guarantee program established under Title XVII of the Energy Policy Act of 2005 (Title XVII Loan Guarantee Program), Georgia Power and the DOE entered into the Loan Guarantee Agreement in 2014, under which the DOE agreed to guarantee the obligations of Georgia Power under a note purchase agreement (FFB Note Purchase Agreement) among the DOE, Georgia Power, and the FFB and a related promissory note (FFB Promissory Note). The FFB Note Purchase Agreement and the FFB Promissory Note provide for a multi-advance term loan facility (FFB Credit Facility), under which Georgia Power may make term loan borrowings through the FFB.
In July 2017, Georgia Power entered into an amendment to the Loan Guarantee Agreement (LGA Amendment) in connection with the DOE's consent to Georgia Power's entry into the Vogtle Services Agreement and the related intellectual property licenses (IP Licenses).
Under the terms of the Loan Guarantee Agreement, upon termination of the Vogtle 3 and 4 Agreement, further advances are conditioned upon the DOE's approval of any agreements entered into in replacement of the Vogtle 3 and 4 Agreement. Under the terms of the LGA Amendment, Georgia Power will not request any advances unless and until certain conditions are satisfied, including (i) receipt of the DOE's approval of the Bechtel Agreement (together with the Vogtle Services Agreement and the IP Licenses, the Replacement EPC Arrangements) and (ii) Georgia Power's entry into a further amendment to the Loan Guarantee Agreement with the DOE to reflect the Replacement EPC Arrangements.
Proceeds of advances made under the FFB Credit Facility are used to reimburse Georgia Power for Eligible Project Costs. Aggregate borrowings under the FFB Credit Facility may not exceed the lesser of (i) 70% of Eligible Project Costs or (ii) approximately $3.46 billion .
In September 2017, the DOE issued a conditional commitment to Georgia Power for up to approximately $1.67 billion of additional guaranteed loans under the Loan Guarantee Agreement. This conditional commitment expires on March 31, 2019 , subject to any further extension approved by the DOE. Final approval and issuance of these additional loan guarantees by the DOE cannot be assured and are subject to the negotiation of definitive agreements, completion of due diligence by the DOE, receipt of any necessary regulatory approvals, and satisfaction of other conditions.
All borrowings under the FFB Credit Facility are full recourse to Georgia Power, and Georgia Power is obligated to reimburse the DOE for any payments the DOE is required to make to the FFB under the guarantee. Georgia Power's reimbursement obligations to the DOE are full recourse and secured by a first priority lien on (i) Georgia Power's 45.7% undivided ownership interest in Plant Vogtle Units 3 and 4 (primarily the units under construction, the related real property, and any nuclear fuel loaded in the reactor core) and (ii) Georgia Power's rights and obligations under the principal contracts relating to Plant Vogtle Units 3 and 4. There are no restrictions on Georgia Power's ability to grant liens on other property.
In addition to the conditions described above, future advances are subject to satisfaction of customary conditions, as well as certification of compliance with the requirements of the Title XVII Loan Guarantee Program, including accuracy of project-related representations and warranties, delivery of updated project-related information, and evidence of compliance with the

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prevailing wage requirements of the Davis-Bacon Act of 1931, as amended, and certification from the DOE's consulting engineer that proceeds of the advances are used to reimburse Eligible Project Costs.
Upon satisfaction of all conditions described above, advances may be requested under the FFB Credit Facility on a quarterly basis through 2020. The final maturity date for each advance under the FFB Credit Facility is February 20, 2044. Interest is payable quarterly and principal payments will begin on February 20, 2020. Borrowings under the FFB Credit Facility will bear interest at the applicable U.S. Treasury rate plus a spread equal to 0.375% .
At both December 31, 2018 and 2017 , Georgia Power had $2.6 billion of borrowings outstanding under the FFB Credit Facility.
Under the Loan Guarantee Agreement, Georgia Power is subject to customary borrower affirmative and negative covenants and events of default. In addition, Georgia Power is subject to project-related reporting requirements and other project-specific covenants and events of default.
In the event certain mandatory prepayment events (including any decision not to continue construction of Plant Vogtle Units 3 and 4) occur, the FFB's commitment to make further advances under the FFB Credit Facility will terminate and Georgia Power will be required to prepay the outstanding principal amount of all borrowings under the FFB Credit Facility over a period of five years (with level principal amortization). Among other things, these mandatory prepayment events include (i) the termination of the Vogtle Services Agreement or rejection of the Vogtle Services Agreement in bankruptcy if Georgia Power does not maintain access to intellectual property rights under the IP Licenses; (ii) a decision by Georgia Power not to continue construction of Plant Vogtle Units 3 and 4; (iii) cancellation of Plant Vogtle Units 3 and 4 by the Georgia PSC, or by Georgia Power if authorized by the Georgia PSC; and (iv) cost disallowances by the Georgia PSC that could have a material adverse effect on completion of Plant Vogtle Units 3 and 4 or Georgia Power's ability to repay the outstanding borrowings under the FFB Credit Facility. Under certain circumstances, insurance proceeds and any proceeds from an event of taking must be applied to immediately prepay outstanding borrowings under the FFB Credit Facility. In addition, if Georgia Power discontinues construction of Plant Vogtle Units 3 and 4, Georgia Power would be obligated to immediately repay a portion of the outstanding borrowings under the FFB Credit Facility to the extent such outstanding borrowings exceed 70% of Eligible Project Costs, net of the proceeds received by Georgia Power under the Guarantee Settlement Agreement. Georgia Power also may voluntarily prepay outstanding borrowings under the FFB Credit Facility. Under the FFB Credit Facility, any prepayment (whether mandatory or optional) will be made with a make-whole premium or discount, as applicable.
In connection with any cancellation of Plant Vogtle Units 3 and 4 that results in a mandatory prepayment event, the DOE may elect to continue construction of Plant Vogtle Units 3 and 4. In such an event, the DOE will have the right to assume Georgia Power's rights and obligations under the principal agreements relating to Plant Vogtle Units 3 and 4 and to acquire all or a portion of Georgia Power's ownership interest in Plant Vogtle Units 3 and 4.
Other Long-Term Debt
Alabama Power
Alabama Power has formed a wholly-owned trust subsidiary for the purpose of issuing preferred securities. The proceeds of the related equity investments and preferred security sales were loaned back to Alabama Power through the issuance of junior subordinated notes totaling $206 million outstanding at December 31, 2018 and 2017 , which constitute substantially all of the assets of this trust and are reflected in the balance sheets as long-term debt payable. Alabama Power considers that the mechanisms and obligations relating to the preferred securities issued for its benefit, taken together, constitute a full and unconditional guarantee by it of the trust's payment obligations with respect to these securities. At December 31, 2018 and 2017 , trust preferred securities of $200 million were outstanding. See Note 1 under " Variable Interest Entities " for additional information on the accounting treatment for this trust and the related securities.
Mississippi Power
At December 31, 2018 and 2017 , Mississippi Power had $270 million aggregate principal amount outstanding of Mississippi Business Finance Corporation Taxable Revenue Bonds, 7.13% Series 1999A due October 20, 2021. Mississippi Power assumed the obligations in 2011 in connection with its election under its operating lease of Plant Daniel Units 3 and 4 to purchase the assets. The bonds were recorded at fair value at the date of assumption, or $346 million , reflecting a premium of $76 million . See " Secured Debt " herein for additional information.
At December 31, 2018 and 2017 , Mississippi Power had $50 million of tax-exempt revenue bond obligations outstanding representing loans to Mississippi Power from a public authority of funds derived from the sale by such authority of revenue bonds issued to finance a portion of the costs of constructing the Kemper County energy facility.

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Southern Company and Subsidiary Companies 2018 Annual Report

Southern Company Gas
At December 31, 2018 and 2017 , Nicor Gas had $1.3 billion and $1.0 billion , respectively, of first mortgage bonds outstanding. These bonds have been issued with maturities ranging from 2019 to 2058. See " Secured Debt " herein for additional information.
Prior to its sale, in the second quarter 2018, Pivotal Utility Holdings caused $200 million aggregate principal amount of gas facility revenue bonds to be redeemed.
Nicor Gas issued $300 million aggregate principal amount of first mortgage bonds in a private placement, of which $100 million was issued in August 2018 and $200 million was issued in November 2018.
At both December 31, 2018 and 2017 , Atlanta Gas Light had $159 million of medium-term notes outstanding.
Capital Leases
Assets acquired under capital leases are recorded in the balance sheets as property, plant, and equipment and the related obligations are classified as long-term debt. See Note 5 under " Capital Leases " for additional information.
Southern Company
At December 31, 2018 and 2017 , SCS had capital lease obligations of approximately $178 million and $177 million , respectively, for an office building and certain computer equipment including desktops, laptops, servers, printers, and storage devices with annual interest rates that range from 1.6% to 4.7% .
Georgia Power
At December 31, 2018 and 2017 , Georgia Power had a capital lease obligation for its corporate headquarters building of $15 million and $22 million , respectively, with an annual interest rate of 7.9% . For ratemaking purposes, the Georgia PSC has allowed the lease payments in cost of service with no return on the capital lease asset. The difference between the depreciation and the lease payments allowed for ratemaking purposes is recovered as operating expenses as ordered by the Georgia PSC. The annual operating expense incurred for this capital lease was not material for any year presented.
At December 31, 2018 and 2017 , Georgia Power had capital lease obligations related to two affiliate PPAs with Southern Power of $128 million and $132 million , respectively. The annual interest rates range from 11% to 12% for these two capital lease PPAs. For ratemaking purposes, the Georgia PSC has included the capital lease asset amortization in cost of service and the interest in Georgia Power's cost of debt. See Note 1 under " Affiliate Transactions " and Note 9 under " Fuel and Power Purchase Agreements Affiliate " for additional information.
Secured Debt
Each of Southern Company's subsidiaries is organized as a legal entity, separate and apart from Southern Company and its other subsidiaries. There are no agreements or other arrangements among the Southern Company system companies under which the assets of one company have been pledged or otherwise made available to satisfy obligations of Southern Company or any of its other subsidiaries.
Outstanding secured debt at December 31, 2018 and 2017 for the applicable registrants was as follows:
 
Georgia
Power
(a)
Mississippi
 Power (b)
Southern
Company
 Gas (c)
 
(in millions)
December 31, 2018
$
2,767

$
270

$
1,325

December 31, 2017
2,779

270

1,025

(a)
Includes Georgia Power's FFB loans that are secured by a first priority lien on (i) Georgia Power's 45.7% undivided ownership interest in Plant Vogtle Units 3 and 4 (primarily the units under construction, the related real property, and any nuclear fuel loaded in the reactor core) and (ii) Georgia Power's rights and obligations under the principal contracts relating to Plant Vogtle Units 3 and 4. These borrowings totaled $2.6 billion at both December 31, 2018 and 2017 . See " Long-term Debt DOE Loan Guarantee Borrowings " herein for additional information. Also includes capital lease obligations of $142 million and $154 million at December 31, 2018 and 2017 , respectively. See " Long-term Debt Capital Leases Georgia Power " herein for additional information.
(b)
The revenue bonds assumed in conjunction with Mississippi Power's purchase of Plant Daniel Units 3 and 4 are secured by Plant Daniel Units 3 and 4 and certain related personal property. See " Long-term Debt Other Long-Term Debt " herein for additional information.
(c)
Nicor Gas' first mortgage bonds are secured by substantially all of Nicor Gas' properties. See " Long-term Debt Other Long-Term Debt Southern Company Gas " herein for additional information.

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Southern Company and Subsidiary Companies 2018 Annual Report

At December 31, 2018 and 2017 , Gulf Power had $41 million of secured debt related to a lien on its property at Plant Daniel in connection with the issuance of two series of its pollution control revenue bonds, which are included in liabilities held for sale on Southern Company's balance sheet at December 31, 2018. On January 1, 2019, Southern Company completed its sale of Gulf Power to NextEra Energy. See Note 15 under " Southern Company's Sale of Gulf Power " for additional information.
Each registrant's senior notes, junior subordinated notes, pollution control and other revenue bond obligations, bank term loans, credit facility borrowings, and notes payable are effectively subordinated to all secured debt of each respective registrant.
Bank Credit Arrangements
At December 31, 2018 , committed credit arrangements with banks were as follows:
 
Expires
 
 
 
Executable Term Loans
 
Expires Within
One Year
Company
2019
 
2020
 
2022
 
Total
 
Unused (d)
 
One
Year
 
Two
Years
 
Term Out
 
No Term Out
 
(in millions)
Southern Company (a)
$

 
$

 
$
2,000

 
$
2,000

 
$
1,999

 
$

 
$

 
$

 
$

Alabama Power
33

 
500

 
800

 
1,333

 
1,333

 

 

 

 
33

Georgia Power

 

 
1,750

 
1,750

 
1,736

 

 

 

 

Mississippi Power
100

 

 

 
100

 
100

 

 

 

 
100

Southern Power (b)

 

 
750

 
750

 
727

 

 

 

 

Southern Company Gas (c)

 

 
1,900

 
1,900

 
1,895

 

 

 

 

Other
30

 

 

 
30

 
30

 

 

 

 
30

Southern Company Consolidated (e)
$
163

 
$
500

 
$
7,200

 
$
7,863

 
$
7,820

 
$

 
$

 
$

 
$
163

(a)
Represents the Southern Company parent entity.
(b)
Southern Power's subsidiaries are not parties to its bank credit arrangement.
(c)
Southern Company Gas provides a parent guarantee of the obligations of its subsidiary Southern Company Gas Capital, which is the borrower of $1.4 billion ( $1.395 billion unused) of this arrangement. Southern Company Gas' committed credit arrangement also includes $500 million (all unused) for which Nicor Gas is the borrower and which is restricted for working capital needs of Nicor Gas. Pursuant to this multi-year credit arrangement, the allocations between Southern Company Gas Capital and Nicor Gas may be adjusted. See " Structural Considerations " herein for additional information.
(d)
Amounts used are for letters of credit.
(e)
Excludes $280 million of committed credit arrangements of Gulf Power, which was sold on January 1, 2019. See Note 15 under " Southern Company's Sale of Gulf Power " for additional information.
Most of the bank credit arrangements require payment of commitment fees based on the unused portion of the commitments or the maintenance of compensating balances with the banks. Commitment fees average less than 1 / 4 of 1% for Southern Company, the traditional electric operating companies, Southern Power, Southern Company Gas, and Nicor Gas. Compensating balances are not legally restricted from withdrawal.
Subject to applicable market conditions, Southern Company and its subsidiaries expect to renew or replace their bank credit arrangements as needed, prior to expiration. In connection therewith, Southern Company and its subsidiaries may extend the maturity dates and/or increase or decrease the lending commitments thereunder.
Southern Company's, Southern Company Gas', and Nicor Gas' credit arrangements contain covenants that limit debt levels to 70% of total capitalization, as defined in the agreements, and most of the other subsidiaries' bank credit arrangements contain covenants that limit debt levels to 65% of total capitalization, as defined in the agreements. For purposes of these definitions, debt excludes the long-term debt payable to affiliated trusts and, in certain arrangements, other hybrid securities. Additionally, for Southern Company and Southern Power, for purposes of these definitions, debt would exclude any project debt incurred by certain subsidiaries of Southern Power to the extent such debt is non-recourse to Southern Power and capitalization would exclude the capital stock or other equity attributable to such subsidiaries. At December 31, 2018 , Southern Company, the traditional electric operating companies, Southern Power, Southern Company Gas, and Nicor Gas were each in compliance with their respective debt limit covenants.
A portion of the unused credit with banks is allocated to provide liquidity support to the revenue bonds of the traditional electric operating companies and the commercial paper programs of Southern Company, the traditional electric operating companies, Southern Power, Southern Company Gas, and Nicor Gas. The amount of variable rate revenue bonds of the traditional electric

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Southern Company and Subsidiary Companies 2018 Annual Report

operating companies outstanding requiring liquidity support at December 31, 2018 was approximately $1.6 billion (comprised of approximately $854 million at Alabama Power, $659 million at Georgia Power, $82 million at Gulf Power, and $40 million at Mississippi Power). In addition, at December 31, 2018 , the traditional electric operating companies had approximately $403 million (comprised of approximately $345 million at Georgia Power and $58 million at Gulf Power) of revenue bonds outstanding that are required to be remarketed within the next 12 months . See Note 15 under " Southern Company's Sale of Gulf Power " for information regarding the sale of Gulf Power on January 1, 2019. Subsequent to December 31, 2018, Georgia Power redeemed approximately $108 million of obligations related to outstanding variable rate pollution control revenue bonds.
In addition to its credit arrangement described above, Southern Power also has a $120 million continuing letter of credit facility expiring in 2021 for standby letters of credit. At December 31, 2018 , $103 million has been used for letters of credit, primarily as credit support for PPA requirements, and $17 million was unused. At December 31, 2017 , the total amount available under this facility was $19 million . Southern Power's subsidiaries are not parties to this letter of credit facility. Also, at December 31, 2018 and 2017 , Southern Power had $ 103 million and $113 million , respectively, of cash collateral posted related to PPA requirements, which is included in other deferred charges and assets in Southern Power's consolidated balance sheets.
Notes Payable
Southern Company, Alabama Power, Georgia Power, Southern Power, Southern Company Gas, Nicor Gas, and SEGCO make short-term borrowings primarily through commercial paper programs that have the liquidity support of the committed bank credit arrangements described above under " Bank Credit Arrangements ." Southern Power's subsidiaries are not parties to its commercial paper program. Southern Company Gas maintains commercial paper programs at Southern Company Gas Capital and at Nicor Gas. Nicor Gas' commercial paper program supports working capital needs at Nicor Gas as Nicor Gas is not permitted to make money pool loans to affiliates. All of Southern Company Gas' other subsidiaries benefit from Southern Company Gas Capital's commercial paper program. See " Structural Considerations " herein for additional information.
In addition, Southern Company and certain of its subsidiaries have entered into various bank term loan agreements. Unless otherwise stated, the proceeds of these loans were used to repay existing indebtedness and for general corporate purposes, including working capital and, for the subsidiaries, their continuous construction programs.

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Southern Company and Subsidiary Companies 2018 Annual Report

Commercial paper and short-term bank term loans are included in notes payable in the balance sheets. Details of short-term borrowings were as follows:
 
Notes Payable at December 31, 2018
 
Notes Payable at December 31, 2017
 
Amount
Outstanding
 
Weighted Average
Interest Rate
 
Amount
Outstanding
 
Weighted Average
Interest Rate
 
(in millions)
 
 
 
(in millions)
 
 
Southern Company
 
 
 
 
 
 
 
Commercial paper
$
1,064

 
3.0
%
 
$
1,832

 
1.8
%
Short-term bank debt
1,851

 
3.1
%
 
607

 
2.3
%
Total
$
2,915

 
3.1
%
 
$
2,439

 
1.9
%
 
 
 
 
 
 
 
 
Alabama Power
 
 
 
 
 
 
 
Short-term bank debt
$

 
%
 
$
3

 
3.7
%
 
 
 
 
 
 
 
 
Georgia Power
 
 
 
 
 
 
 
Commercial paper
$
294

 
3.1
%
 
$

 
%
Short-term bank debt

 
%
 
150

 
2.2
%
Total
$
294

 
3.1
%
 
$
150

 
2.2
%
 
 
 
 
 
 
 
 
Mississippi Power
 
 
 
 
 
 
 
Short-term bank debt
$

 
%
 
$
4

 
3.8
%
 
 
 
 
 
 
 
 
Southern Power
 
 
 
 
 
 
 
Commercial paper
$

 
%
 
$
105

 
2.0
%
Short-term bank debt
100

 
3.1
%
 

 
%
Total
$
100

 
3.1
%
 
$
105

 
2.0
%
 
 
 
 
 
 
 
 
Southern Company Gas
 
 
 
 
 
 
 
Commercial paper:
 
 
 
 
 
 
 
Southern Company Gas Capital
$
403

 
3.1
%
 
$
1,243

 
1.7
%
Nicor Gas
247

 
3.0
%
 
275

 
1.8
%
Total
$
650

 
3.0
%
 
$
1,518

 
1.8
%
The outstanding bank term loans at December 31, 2018 have covenants that limit debt levels to a percentage of total capitalization. The percentage is 70% for Southern Company and 65% for Alabama Power and Southern Power, as defined in the agreements. For purposes of these definitions, debt excludes any long-term debt payable to affiliated trusts and other hybrid securities. Additionally, for Southern Company and Southern Power, for purposes of these definitions, debt excludes any project debt incurred by certain subsidiaries of Southern Power to the extent such debt is non-recourse to Southern Power and capitalization excludes the capital stock or other equity attributable to such subsidiary. At December 31, 2018 , each of Southern Company, Alabama Power, and Southern Power was in compliance with its debt limits.
Except as otherwise described herein, Southern Company and its subsidiaries used the proceeds of bank loans for long-term debt redemptions and maturities, to repay short-term indebtedness, and for general corporate purposes, including working capital.
In March 2018, Southern Company entered into a $900 million short-term floating rate bank loan bearing interest based on one -month LIBOR, which was repaid in August 2018.
In April 2018, Southern Company borrowed $250 million pursuant to a short-term uncommitted bank credit arrangement, bearing interest at a rate agreed upon by Southern Company and the bank from time to time and payable on no less than 30 days' demand by the bank. Subsequent to December 31, 2018, Southern Company repaid this loan.
In June 2018, Southern Company repaid at maturity two $100 million short-term floating rate bank term loans.

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Southern Company and Subsidiary Companies 2018 Annual Report

In August 2018, Southern Company entered into a $1.5 billion short-term floating rate bank loan bearing interest based on one -month LIBOR, and repaid $250 million borrowed in August 2017 pursuant to a short-term uncommitted bank credit arrangement. Subsequent to December 31, 2018, Southern Company repaid this loan.
In January 2018, Georgia Power repaid its outstanding $150 million floating rate bank loan due May 31, 2018.
In March 2018, Mississippi Power entered into a $300 million short-term floating rate bank loan bearing interest based on one -month LIBOR, of which $200 million was repaid in the second quarter 2018 and $100 million was repaid in the third quarter 2018.
In May 2018, Southern Power entered into two short-term floating rate bank loans, each for an aggregate principal amount of $100 million , which bear interest based on one -month LIBOR. In November 2018, Southern Power repaid one of these short-term loans.
In January 2018, Southern Company Gas issued a floating rate promissory note to Southern Company in an aggregate principal amount of $100 million bearing interest based on one -month LIBOR. In March 2018, Southern Company Gas repaid this promissory note.
In April 2018, Pivotal Utility Holdings, as borrower, and Southern Company Gas, as guarantor, entered into a $181 million short-term delayed draw floating rate bank term loan bearing interest based on one-month LIBOR. In July 2018, Pivotal Utility Holdings repaid this short-term loan.
In May 2018, Southern Company Gas Capital borrowed $95 million pursuant to a short-term uncommitted bank credit arrangement, guaranteed by Southern Company Gas, bearing interest at a rate agreed upon by Southern Company Gas Capital and the bank from time to time and payable on no less than 30 days' demand by the bank. In July 2018, Southern Company Gas Capital repaid this loan.
Outstanding Classes of Capital Stock
Southern Company
Common Stock
Stock Issued
During 2018 , Southern Company issued approximately 11.6 million shares of common stock primarily through employee equity compensation plans and received proceeds of approximately $442 million .
In addition, during the third and fourth quarters 2018 , Southern Company issued a total of approximately 12.1 million and 2.5 million shares, respectively, of common stock through at-the-market issuances pursuant to sales agency agreements related to Southern Company's continuous equity offering program and received cash proceeds of approximately $540 million and $108 million , respectively, net of $5 million and $1 million in commissions, respectively.
Shares Reserved
At December 31, 2018 , a total of 92 million shares were reserved for issuance pursuant to the Southern Investment Plan, employee savings plans, the Outside Directors Stock Plan, the Omnibus Incentive Compensation Plan (which includes stock options and performance share units as discussed in Note 12 ), and an at-the-market program. Of the total 92 million shares reserved, there were 10 million shares of common stock remaining available for awards under the Omnibus Incentive Compensation Plan at December 31, 2018 .

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Southern Company and Subsidiary Companies 2018 Annual Report

Diluted Earnings Per Share
For Southern Company, the only difference in computing basic and diluted earnings per share (EPS) is attributable to awards outstanding under the stock option and performance share plans. The effect of both stock options and performance share award units was determined using the treasury stock method. Shares used to compute diluted EPS were as follows:
 
Average Common Stock Shares
 
2018
 
2017
 
2016
 
(in millions)
As reported shares
1,020

 
1,000

 
951

Effect of options and performance share award units
5

 
8

 
7

Diluted shares
1,025

 
1,008

 
958

Stock options and performance share award units that were not included in the diluted EPS calculation because they were anti-dilutive were immaterial in all years presented.
Redeemable Preferred Stock of Subsidiaries
Prior to 2017, each of the traditional electric operating companies had outstanding preferred and/or preference stock. During 2017, Alabama Power and Gulf Power redeemed all of their outstanding preference stock and Georgia Power redeemed all of its outstanding preferred and preference stock. During 2018, Mississippi Power redeemed all of its outstanding preferred stock. The remaining preferred stock of Alabama Power contains a feature that allows the holders to elect a majority of such subsidiary's board of directors if preferred dividends are not paid for four consecutive quarters. Because such a potential redemption-triggering event is not solely within the control of Alabama Power, this preferred stock is presented as "Redeemable Preferred Stock of Subsidiaries" on Southern Company's balance sheets and statements of capitalization in a manner consistent with temporary equity under applicable accounting standards.
The following table presents changes during the year in redeemable preferred stock of subsidiaries for Southern Company:
 
Redeemable Preferred Stock of Subsidiaries
 
(in millions)
Balance at December 31, 2015 and 2016:
$
118

Issued (a)
250

Redeemed (a)
(38
)
Issuance costs (a)
(6
)
Balance at December 31, 2017:
324

Redeemed (b)
(33
)
Balance at December 31, 2018:
$
291

(a)
See " Alabama Power " herein for additional information.
(b)
See " Mississippi Power " herein for additional information.
Alabama Power
Alabama Power has preferred stock, Class A preferred stock, and common stock outstanding. Alabama Power also has authorized preference stock, none of which is outstanding. Alabama Power's preferred stock and Class A preferred stock, without preference between classes, rank senior to Alabama Power's common stock with respect to payment of dividends and voluntary and involuntary dissolution. The preferred stock and Class A preferred stock of Alabama Power contain a feature that allows the holders to elect a majority of Alabama Power's board of directors if preferred dividends are not paid for four consecutive quarters. Because such a potential redemption-triggering event is not solely within the control of Alabama Power, the preferred stock and Class A preferred stock is presented as "Redeemable Preferred Stock" on Alabama Power's balance sheets and statements of capitalization in a manner consistent with temporary equity under applicable accounting standards.
Alabama Power's preferred stock is subject to redemption at a price equal to the par value plus a premium. Alabama Power's Class A preferred stock is subject to redemption at a price equal to the stated capital. All series of Alabama Power's preferred stock currently are subject to redemption at the option of Alabama Power. The Class A preferred stock is subject to redemption on or

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Southern Company and Subsidiary Companies 2018 Annual Report

after October 1, 2022, or following the occurrence of a rating agency event. Information for each outstanding series is in the table below:
Preferred Stock
Par Value/Stated Capital Per Share
 
Shares Outstanding
 
Redemption
Price Per Share
4.92% Preferred Stock
$100
 
80,000

 
$103.23
4.72% Preferred Stock
$100
 
50,000

 
$102.18
4.64% Preferred Stock
$100
 
60,000

 
$103.14
4.60% Preferred Stock
$100
 
100,000

 
$104.20
4.52% Preferred Stock
$100
 
50,000

 
$102.93
4.20% Preferred Stock
$100
 
135,115

 
$105.00
5.00% Class A Preferred Stock
$25
 
10,000,000

 
Stated Capital (*)
(*)
Prior to October 1, 2022: $25.50 ; on or after October 1, 2022: Stated Capital
In September 2017, Alabama Power issued 10 million shares ( $250 million aggregate stated capital) of 5.00% Class A Preferred Stock, Cumulative, Par Value $1 Per Share (Stated Capital $25 Per Share). The proceeds were used in October 2017 to redeem all 2 million shares ( $50 million aggregate stated capital) of 6.50% Series Preference Stock, 6 million shares ( $150 million aggregate stated capital) of 6.45% Series Preference Stock, and 1.52 million shares ( $38 million aggregate stated capital) of 5.83% Class A Preferred Stock and for other general corporate purposes, including Alabama Power's continuous construction program.
There were no changes for the year ended December 31, 2018 in redeemable preferred stock of Alabama Power.
Georgia Power
Georgia Power has preferred stock, Class A preferred stock, preference stock, and common stock authorized, but only common stock outstanding as of December 31, 2018 and 2017 . In October 2017, Georgia Power redeemed all 1.8 million shares ( $45 million aggregate liquidation amount) of its 6.125% Series Class A Preferred Stock and 2.25 million shares ( $225 million aggregate liquidation amount) of its 6.50% Series 2007A Preference Stock.
Mississippi Power
Mississippi Power has preferred stock and common stock authorized, but only common stock outstanding as of December 31, 2018. Mississippi Power previously had preferred stock that contained a feature allowing the holders to elect a majority of Mississippi Power's board of directors if preferred dividends were not paid for four consecutive quarters. Because such a potential redemption-triggering event was not solely within the control of Mississippi Power, this preferred stock was presented as "Cumulative Redeemable Preferred Stock" on Mississippi Power's balance sheets and statements of capitalization in a manner consistent with temporary equity under applicable accounting standards.
On October 23, 2018, Mississippi Power completed the redemption of all 8,867 outstanding shares ( $886,700 aggregate par value) of its 4.40% Series Preferred Stock, all 8,643 outstanding shares ( $864,300 aggregate par value) of its 4.60% Series Preferred Stock, all 16,700 outstanding shares ( $1.67 million aggregate par value) of its 4.72% Series Preferred Stock, and all 1,200,000 outstanding depositary shares ( $30 million aggregate stated value), each representing a 1/4th interest in a share of its 5.25% Series Preferred Stock.
Dividend Restrictions
The income of Southern Company is derived primarily from equity in earnings of its subsidiaries. At December 31, 2018 , consolidated retained earnings included $4.9 billion of undistributed retained earnings of the subsidiaries.
The traditional electric operating companies and Southern Power can only pay dividends to Southern Company out of retained earnings or paid-in-capital.
See Note 7 under " Southern Power " for information regarding the distribution requirements for certain Southern Power subsidiaries.
The authority of the natural gas distribution utilities to pay dividends to Southern Company Gas is subject to regulation. By regulation, Nicor Gas is restricted, to the extent of its retained earnings balance, in the amount it can dividend or loan to affiliates and is not permitted to make money pool loans to affiliates. At December 31, 2018 , the amount of Southern Company Gas' subsidiary retained earnings restricted for dividend payment totaled $814 million .

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Southern Company and Subsidiary Companies 2018 Annual Report

Structural Considerations
Since Southern Company and Southern Company Gas are holding companies, the right of Southern Company and Southern Company Gas and, hence, the right of creditors of Southern Company or Southern Company Gas to participate in any distribution of the assets of any respective subsidiary of Southern Company or Southern Company Gas, whether upon liquidation, reorganization or otherwise, is subject to prior claims of creditors and preferred stockholders of such subsidiary.
Southern Company Gas' 100% -owned subsidiary, Southern Company Gas Capital, was established to provide for certain of Southern Company Gas' ongoing financing needs through a commercial paper program, the issuance of various debt, hybrid securities, and other financing arrangements. Southern Company Gas fully and unconditionally guarantees all debt issued by Southern Company Gas Capital. Nicor Gas is not permitted by regulation to make loans to affiliates or utilize Southern Company Gas Capital for its financing needs.
Southern Power Company's senior notes, bank term loans, commercial paper, and bank credit arrangement are unsecured senior indebtedness, which rank equally with all other unsecured and unsubordinated debt of Southern Power Compan y. Southern Power's subsidiaries are not issuers, borrowers, or obligors, as applicable, under the senior notes, borrowings from financial institutions , commercial paper, or the bank credit arrangement. The se nior notes, borrowings from financial institutions, commercial paper, and the bank credit arrangement are effectively subordinated to any future secured debt of Southern Power Company and any potential claims of creditors of Southern Power's subsidiaries.

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Southern Company and Subsidiary Companies 2018 Annual Report

9 . COMMITMENTS
Fuel and Power Purchase Agreements
Non-Affiliate
To supply a portion of the fuel requirements of the Southern Company system's electric generating plants, the Southern Company system has entered into various long-term commitments not recognized on the balance sheets for the procurement and delivery of fossil fuel and, for Alabama Power and Georgia Power, nuclear fuel. Fuel expense in 2018 , 2017 , and 2016 for the Southern Company system is shown below, the majority of which was purchased under long-term commitments.
 
Southern Company
Alabama
Power
Georgia
Power
Mississippi Power
Southern
Power
 
(in millions)
2018
$
4,637

$
1,301

$
1,698

$
405

$
699

2017
4,400

1,225

1,671

395

621

2016
4,361

1,297

1,807

343

456

Each registrant expects that a substantial amount of its future fuel needs will continue to be purchased under long-term commitments.
The traditional electric operating companies have entered into various non-affiliate long-term PPAs, some of which are accounted for as leases. For Alabama Power and Georgia Power, most long-term PPAs include capacity and energy components. Mississippi Power's long-term PPAs are associated with solar facilities and only include an energy component. For the traditional electric operating companies, the energy-related costs associated with PPAs are recoverable through fuel cost recovery provisions.
Total capacity expense under these non-affiliate PPAs accounted for as operating leases in 2018 , 2017 , and 2016 was as follows:
 
Southern Company
Alabama
Power
Georgia
Power
 
(in millions)
2018
$
231

$
44

$
113

2017
235

41

118

2016
232

42

113

In addition, Georgia Power's non-affiliate energy-only solar PPAs accounted for as leases contained contingent rent expense of $43 million , $44 million , and $18 million for 2018 , 2017 , and 2016 , respectively. Mississippi Power's energy-only solar PPAs accounted for as operating leases contained contingent rent expense of $10 million , $5 million , and an immaterial amount for 2018 , 2017 , and 2016 , respectively. Contingent rents are recognized as services are performed.
Estimated total obligations under non-affiliate PPAs accounted for as operating leases at December 31, 2018 were as follows:
 
Southern Company
Alabama Power
Georgia
Power
 
(in millions)
2019
$
161

$
41

$
120

2020
164

42

122

2021
168

44

124

2022
171

46

125

2023
127


127

2024 and thereafter
642


642

Total
$
1,433

$
173

$
1,260

In addition, Georgia Power has commitments regarding a portion of a 5% interest in the original cost of Plant Vogtle Units 1 and 2 owned by MEAG Power that are in effect until the latter of the retirement of the plant or the latest stated maturity date of MEAG Power's bonds issued to finance such ownership interest. The payments for capacity are required whether or not any capacity is

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Southern Company and Subsidiary Companies 2018 Annual Report

available. The energy cost is a function of each unit's variable operating costs. Portions of the capacity payments relate to costs in excess of MEAG Power's Plant Vogtle Units 1 and 2 allowed investment for ratemaking purposes. The present value of these portions at the time of the disallowance was written off. Generally, the cost of such capacity and energy is included in purchased power in Southern Company's statements of income and in purchased power, non-affiliates in Georgia Power's statements of income. Georgia Power's capacity payments related to this commitment totaled $8 million , $9 million , and $11 million in 2018 , 2017 , and 2016 , respectively. At December 31, 2018 , Georgia Power's estimated long-term obligations related to this commitment totaled $59 million , consisting of $6 million for 2019 , $5 million for 2020 , $5 million for 2021 , $4 million for 2022 , $3 million for 2023 , and $36 million for 2024 and thereafter .
SCS may enter into various types of wholesale energy and natural gas contracts acting as an agent for the traditional electric operating companies and Southern Power. Under these agreements, each of the traditional electric operating companies and Southern Power may be jointly and severally liable. Accordingly, Southern Company has entered into keep-well agreements with each of the traditional electric operating companies to ensure they will not subsidize or be responsible for any costs, losses, liabilities, or damages resulting from the inclusion of Southern Power as a contracting party under these agreements.
Affiliate
Georgia Power has also entered into affiliate long-term PPAs with Southern Power, some of which Georgia Power accounts for as leases. Georgia Power's total capacity expense under these affiliate PPAs accounted for as leases was $93 million , $107 million , and $133 million in 2018 , 2017 , and 2016 , respectively. In addition, Georgia Power's energy-only solar PPAs with Southern Power accounted for as leases contained contingent rent expense of $29 million , $29 million , and $21 million for 2018 , 2017 , and 2016 , respectively.
Georgia Power's estimated total obligations under affiliate PPAs accounted for as leases at December 31, 2018 were as follows:
 
Georgia Power
 
Affiliate Capital Lease PPAs
 
Affiliate Operating
Lease PPAs
 
(in millions)
2019
$
23

 
$
64

2020
23

 
65

2021
24

 
66

2022
24

 
68

2023
25

 
69

2024 and thereafter
158

 
349

Total
$
277

 
$
681

Less: amounts representing executory costs (a)
42

 
 
Net minimum lease payments
235

 
 
Less: amounts representing interest (b)
105

 
 
Present value of net minimum lease payments
$
130

 
 
(a)
Executory costs such as taxes, maintenance, and insurance (including the estimated profit thereon) a re estimated and included in total minimum lease payments.
(b)
Calculated using an adjusted incremental borrowing rate to reduce the present value of the net minimum lease payments to fair value.
See Note 8 under " Long-term Debt Capital Leases Georgia Power " for additional information.
Pipeline Charges, Storage Capacity, and Gas Supply
Southern Company Gas has commitments for pipeline charges, storage capacity, and gas supply, which include charges recoverable through natural gas cost recovery mechanisms, or alternatively, billed to marketers selling retail natural gas, as well as demand charges associated with Southern Company Gas' wholesale gas services. Gas supply commitments include amounts for gas commodity purchases associated with Southern Company Gas' gas marketing services of 47 million mmBtu at floating gas prices calculated using forward natural gas prices at December 31, 2018 and valued at $150 million . Southern Company Gas provides guarantees to certain gas suppliers for certain of its subsidiaries in support of payment obligations.

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Southern Company and Subsidiary Companies 2018 Annual Report

Southern Company Gas' expected future contractual obligations for pipeline charges, storage capacity, and gas supply that are not recognized on the balance sheets at December 31, 2018 were as follows:
 
Pipeline Charges, Storage Capacity, and Gas Supply
 
(in millions)
2019
$
781

2020
584

2021
520

2022
489

2023
412

2024 and thereafter
1,871

Total
$
4,657

Operating Leases
In addition to the operating lease PPAs discussed previously, the Southern Company system has operating lease agreements with various terms and expiration dates. The traditional electric operating companies' operating leases primarily relate to facilities, coal railcars, vehicles, cellular tower space, and other equipment. Southern Power's operating leases primarily relate to land for solar and wind facilities and are recognized on a straight-line basis over the minimum lease term, plus any renewal periods necessary to cover the expected life of the respective facility. Southern Company Gas' operating leases primarily relate to facilities and vehicles.
Total rent expense for 2018 , 2017 , and 2016 was as follows:
 
Southern Company (*)
Alabama Power
Georgia
Power
Mississippi Power
Southern Power (*)
 
(in millions)
2018
$
192

$
23

$
34

$
4

$
31

2017
176

25

31

3

29

2016
169

18

28

3

22

(*)
Includes contingent rent expense related to Southern Power's land leases based on wind production and escalation in the Consumer Price Index for All Urban Consumers.
 
Southern Company Gas
 
(in millions)
2018
$
15

2017
15

Successor – July 1, 2016 through December 31, 2016
8

Predecessor – January 1, 2016 through June 30, 2016
6


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The registrants exclude contingent rent but include any step rents, fixed escalations, lease concessions, and lease extensions to cover the expected life of the facility in the computation of minimum lease payments. At December 31, 2018 , estimated minimum lease payments under operating leases were as follows:
 
Southern Company
Alabama Power
Georgia
Power
Mississippi Power
Southern Power
Southern Company
Gas
 
(in millions)
2019
$
156

$
12

$
23

$
3

$
23

$
18

2020
134

10

18

2

24

16

2021
110

7

9

1

24

15

2022
98

6

6

1

24

13

2023
79

3

5

1

26

10

2024 and thereafter
1,040

1

13

2

874

34

Total
$
1,617

$
39

$
74

$
10

$
995

$
106

For the traditional electric operating companies, a majority of the railcar and barge lease expenses are recoverable through fuel cost recovery provisions.
In addition to the above rental commitments, Alabama Power and Georgia Power have potential obligations upon expiration of certain railcar leases with respect to the residual value of the leased property. These leases have terms expiring in 2023 for Alabama Power and in 2024 for Georgia Power with maximum obligations under these leases of $12 million for Alabama Power and $9 million for Georgia Power. At the termination of the leases, Alabama Power and Georgia Power may renew the leases, exercise their purchase options, or the property can be sold to a third party. Alabama Power and Georgia Power expect that the fair market value of the leased property would substantially reduce or, for Alabama Power, potentially eliminate the loss under the residual value obligations.
Guarantees
Alabama Power has guaranteed unconditionally the obligation of SEGCO under an installment sale agreement for the purchase of certain pollution control facilities at SEGCO's generating units, pursuant to which $25 million principal amount of pollution control revenue bonds are outstanding and mature in June 2019. Alabama Power also guaranteed a $100 million principal amount long-term bank loan entered into by SEGCO on November 28, 2018. Georgia Power has agreed to reimburse Alabama Power for the portion of such obligations corresponding to Georgia Power's proportionate ownership of SEGCO's stock if Alabama Power is called upon to make such payment under its guarantee. At December 31, 2018 , the capitalization of SEGCO consisted of $90 million of equity and $125 million of long-term debt, on which the annual interest requirement is $4 million . In addition, SEGCO had short-term debt outstanding of $5 million . See Note 7 under " SEGCO " for additional information.
In 2013, Georgia Power entered into an agreement that requires Georgia Power to guarantee certain payments of a gas supplier for Plant McIntosh for a period up to 15 years . The agreement was subsequently amended on May 31, 2018. The guarantee is expected to be terminated if certain events occur by October 2019. In the event the gas supplier defaults on payments, the maximum potential exposure under the guarantee and amendment is approximately $30 million .
In October 2017, Atlantic Coast Pipeline executed a $3.4 billion revolving credit facility with a stated maturity date of October 2021. Southern Company Gas entered into a guarantee agreement to support its share of the revolving credit facility. Southern Company Gas' maximum exposure to loss under the terms of the guarantee is limited to 5% of the outstanding borrowings under the credit facility, and totaled $72 million as of December 31, 2018. See Note 2 under "FERC Matters – Southern Company Gas" for additional information regarding the Atlantic Coast Pipeline.
As discussed above under " Operating Leases ," Alabama Power and Georgia Power have entered into certain residual value guarantees related to railcar leases.
10 . INCOME TAXES
Southern Company files a consolidated federal income tax return and the registrants file various state income tax returns, some of which are combined or unitary. Under a joint consolidated income tax allocation agreement, each Southern Company subsidiary's current and deferred tax expense is computed on a stand-alone basis and no subsidiary is allocated more current expense than would be paid if it filed a separate income tax return. PowerSecure and Southern Company Gas became participants in the income

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Southern Company and Subsidiary Companies 2018 Annual Report

tax allocation agreement as of May 9, 2016 and July 1, 2016, respectively. See Note 15 for additional information on these acquisitions, as well as disposition activity during 2018. In accordance with IRS regulations, each company is jointly and severally liable for the federal tax liability. Prior to the Merger, Southern Company Gas filed a U.S. federal consolidated income tax return and various state income tax returns.
Federal Tax Reform Legislation
Following the enactment of the Tax Reform Legislation, the SEC staff issued Staff Accounting Bulletin 118 – "Income Tax Accounting Implications of the Tax Cuts and Jobs Act" (SAB 118), which provided for a measurement period of up to one year from the enactment date to complete accounting under GAAP for the tax effects of the legislation. Due to the complex and comprehensive nature of the enacted tax law changes and their application under GAAP, the registrants considered all amounts recorded in the financial statements as a result of the Tax Reform Legislation "provisional" as discussed in SAB 118 and subject to revision prior to filing the 2017 tax return in the fourth quarter 2018. As of December 31, 2018, each of the registrants considered the measurement of impacts from the Tax Reform Legislation on deferred income tax assets and liabilities, primarily due to the impact of the reduction of the corporate income tax rate, to be complete.
However, the IRS continues to issue regulations that provide further interpretation and guidance on the law and each respective state's adoption of the provisions contained in the Tax Reform Legislation remains uncertain. In addition, the regulatory treatment of certain impacts of the Tax Reform Legislation is subject to the discretion of the FERC and each state regulatory commission. The ultimate impact of these matters cannot be determined at this time. See Note 2 for additional information.
Current and Deferred Income Taxes
Details of income tax provisions are as follows:
 
2018
 
 
 
 
 
 
 
Southern Company
Alabama Power
Georgia
Power
Mississippi Power
Southern Power
 
(in millions)
Federal —
 
 
 
 
 
Current
$
167

$
91

$
393

$
(567
)
$
85

Deferred
231

123

(249
)
575

(154
)
 
398

214

144

8

(69
)
State —
 
 

 
 
Current
188

26

81

(10
)
(9
)
Deferred
(137
)
51

(11
)
(100
)
(86
)
 
51

77

70

(110
)
(95
)
Total
$
449

$
291

$
214

$
(102
)
$
(164
)

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Southern Company and Subsidiary Companies 2018 Annual Report

 
2017
 
 
 
 
 
 
 
Southern Company
Alabama Power
Georgia
Power
Mississippi Power
Southern Power
 
(in millions)
Federal —
 
 
 
 
 
Current
$
(62
)
$
136

$
256

$
194

$
(566
)
Deferred
(6
)
336

504

(753
)
(312
)
 
(68
)
472

760

(559
)
(878
)
State —
 
 
 
 
 
Current
37

23

116


(110
)
Deferred
173

73

(46
)
27

49

 
210

96

70

27

(61
)
Total
$
142

$
568

$
830

$
(532
)
$
(939
)
 
2016
 
Southern Company
Alabama Power
Georgia
Power
Mississippi Power
Southern Power
 
(in millions)
Federal —
 
 
 
 
 
Current
$
1,184

$
103

$
391

$
(31
)
$
928

Deferred
(342
)
339

319

(60
)
(1,098
)
 
842

442

710

(91
)
(170
)
State —
 
 
 
 
 
Current
(108
)
20

6

(6
)
(60
)
Deferred
217

69

64

(7
)
35

 
109

89

70

(13
)
(25
)
Total
$
951

$
531

$
780

$
(104
)
$
(195
)
 
Southern Company Gas
 
Successor
 
 
Predecessor
 
Year Ended December 31, 2018
Year Ended December 31, 2017
July 1, 2016
through
December 31, 2016
 
 
January 1, 2016
through
June 30, 2016
 
(in millions)
 
 
(in millions)
Federal —
 
 
 
 
 
 
Current
$
334

$
103

$

 
 
$
67

Deferred
33

170

65

 
 
8

 
367

273

65

 
 
75

State —
 
 
 
 
 
 
Current
131

27

(16
)
 
 
12

Deferred
(34
)
67

27

 
 

 
97

94

11

 
 
12

Total
$
464

$
367

$
76

 
 
$
87

Southern Company's and Southern Power's ITCs and PTCs generated in the current tax year and carried forward from prior tax years that cannot be utilized in the current tax year are reclassified from current to deferred taxes in federal income tax expense in the tables above. Southern Power's ITCs and PTCs reclassified in this manner include $128 million for 2018 , $316 million for

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Southern Company and Subsidiary Companies 2018 Annual Report

2017 , and $1.13 billion for 2016 . These ITCs and PTCs for Southern Company and Southern Power are included in " Deferred Tax Assets and Liabilities " herein.
In accordance with regulatory requirements, federal ITCs for the traditional electric operating companies and the natural gas distribution utilities, as well as certain state ITCs for Nicor Gas, are deferred, and, upon utilization, amortized over the average life of the related property with such amortization normally applied as a credit to reduce depreciation in the statements of income. Southern Power's deferred federal ITCs are amortized to income tax expense over the life of the respective asset. ITCs amortized in 2018 , 2017 , and 2016 were immaterial for Alabama Power, Georgia Power, Mississippi Power, and Southern Company Gas and were as follows for Southern Company and Southern Power:
 
Southern Company
Southern Power
 
(in millions)
2018
$
87

$
58

2017
79

57

2016
59

37

Southern Power received $5 million of cash related to federal ITCs under renewable energy initiatives in 2018. No cash was received in 2017 or 2016. Southern Power recognized tax credits and reduced the tax basis of the asset by 50% of the ITCs received, resulting in a net deferred tax asset. Southern Power has elected to recognize the tax benefit of this basis difference as a reduction to income tax expense in the year in which the plant reaches commercial operation. The tax benefit of the related basis differences reduced income tax expense by $1 million in 2018 , $18 million in 2017 , and $173 million in 2016 . See " Unrecognized Tax Benefits " herein for further information.
State ITCs and other state credits, which are recognized in the period in which the credits are generated, reduced Georgia Power's income tax expense by $21 million in 2018, $37 million in 2017, and $31 million in 2016 and reduced Southern Power's income tax expense by $32 million in 2017 and $7 million in 2016.
Southern Power's federal and state PTCs, which are recognized in the period in which the credits are generated, reduced Southern Power's income tax expense by $141 million in 2018 , $139 million in 2017 , and $50 million in 2016 .
Legal Entity Reorganizations
In April 2018, Southern Power completed the final stage of a legal entity reorganization of various direct and indirect subsidiaries that own and operate substantially all of its solar facilities, including certain subsidiaries owned in partnership with various third parties. In September 2018, Southern Power also completed a legal entity reorganization of eight operating wind facilities under a new holding company, SP Wind. The reorganizations resulted in net state tax benefits related to certain changes in apportionment rates totaling approximately $65 million , which were recorded in 2018.
Effective Tax Rate
Southern Company's effective tax rate is typically lower than the statutory rate due to employee stock plans' dividend deduction, non-taxable AFUDC equity at the traditional electric operating companies, flowback of excess deferred income taxes at the regulated utilities, and federal income tax benefits from ITCs and PTCs primarily at Southern Power. Each registrant's effective tax rate for 2018 varied significantly as compared to 2017 due to the 14% lower 2018 federal tax rate resulting from the Tax Reform Legislation.

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Southern Company and Subsidiary Companies 2018 Annual Report

A reconciliation of the federal statutory income tax rate to the effective income tax rate is as follows:
 
2018
 
Southern Company
Alabama Power
Georgia
Power
Mississippi Power
Southern Power
Federal statutory rate
21.0
 %
21.0
 %
21.0
 %
21.0
 %
21.0
 %
State income tax, net of federal deduction
1.8

5.0

5.5

(65.1
)
(90.8
)
Employee stock plans' dividend deduction
(1.0
)




Non-deductible book depreciation
0.8

0.6

1.2

0.7


Flowback of excess deferred income taxes
(4.0
)
(1.8
)

(4.1
)

AFUDC-Equity
(1.0
)
(1.0
)
(1.4
)


ITC basis difference
(0.6
)



(0.2
)
Federal PTCs
(4.7
)



(156.6
)
Amortization of ITC
(2.0
)
(0.1
)
(0.2
)
(0.2
)
(55.4
)
Tax impact from sale of subsidiaries
8.6





Tax Reform Legislation
(1.4
)

(4.9
)
(26.3
)
96.1

Noncontrolling interests
(0.4
)



(14.9
)
Other
(0.8
)
(0.1
)
0.1

(1.4
)
2.0

Effective income tax (benefit) rate
16.3
 %
23.6
 %
21.3
 %
(75.4
)%
(198.8
)%
 
2017
 
Southern Company
Alabama Power
Georgia
Power
Mississippi Power (*)
Southern Power
Federal statutory rate
35.0
 %
35.0
 %
35.0
 %
(35.0
)%
35.0
 %
State income tax, net of federal deduction
12.5

4.5

2.0

0.6

(22.2
)
Employee stock plans' dividend deduction
(4.0
)




Non-deductible book depreciation
3.1

0.9

0.7

0.1


Flowback of excess deferred income taxes
(0.3
)

(0.1
)


AFUDC-Equity
(2.6
)
(1.0
)
(0.6
)


AFUDC-Equity portion of Kemper IGCC charge
15.7



5.3


ITC basis difference
(1.7
)



(10.0
)
Federal PTCs
(12.1
)



(72.5
)
Amortization of ITC
(4.2
)
(0.2
)
(0.1
)

(20.6
)
Tax Reform Legislation
(25.6
)
0.3

(0.4
)
11.9

(416.1
)
Noncontrolling interests
(1.4
)



(8.6
)
Other
(1.1
)
0.1

0.2


(10.7
)
Effective income tax (benefit) rate
13.3
 %
39.6
 %
36.7
 %
(17.1
)%
(525.7
)%
(*)
Represents effective income tax benefit rate for Mississippi Power due to a loss before income taxes in 2017.

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Southern Company and Subsidiary Companies 2018 Annual Report

 
2016
 
Southern Company
Alabama Power
Georgia
Power
Mississippi Power (*)
Southern Power
Federal statutory rate
35.0
 %
35.0
 %
35.0
 %
(35.0
)%
35.0
 %
State income tax, net of federal deduction
2.0

4.2

2.1

(5.7
)
(9.1
)
Employee stock plans' dividend deduction
(1.2
)




Non-deductible book depreciation
0.9

1.0

0.8

0.7


Flowback of excess deferred income taxes
(0.1
)

(0.1
)
(0.3
)

AFUDC-Equity
(2.0
)
(0.7
)
(0.8
)
(28.5
)

ITC basis difference
(5.0
)



(96.3
)
Federal PTCs
(1.2
)



(23.3
)
Amortization of ITC
(0.9
)
(0.2
)
(0.2
)
(0.1
)
(13.4
)
Noncontrolling interests
(0.3
)



(6.2
)
Other
0.1

(0.5
)
(0.1
)
0.4

4.7

Effective income tax (benefit) rate
27.3
 %
38.8
 %
36.7
 %
(68.5
)%
(108.6
)%
(*)
Represents effective income tax benefit rate for Mississippi Power due to a loss before income taxes in 2016.
 
Southern Company Gas
 
Successor
 
 
Predecessor
 
Year Ended December 31, 2018
Year Ended December 31, 2017
July 1, 2016
through
December 31, 2016
 
 
January 1, 2016
through
June 30, 2016
Federal statutory rate
21.0%
35.0%
35.0%
 
 
35.0%
State income tax, net of federal deduction
9.2
10.0
3.6
 
 
3.5
Flowback of excess deferred income taxes
(3.0)
(0.2)
 
 
Amortization of ITC
(0.1)
(0.2)
(0.4)
 
 
Tax impact on sale of subsidiaries
28.5
 
 
Tax Reform Legislation
(0.4)
15.0
 
 
Other
0.3
0.6
1.8
 
 
(0.9)
Effective income tax rate
55.5%
60.2%
40.0%
 
 
37.6%

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Southern Company and Subsidiary Companies 2018 Annual Report

Deferred Tax Assets and Liabilities
The tax effects of temporary differences between the carrying amounts of assets and liabilities in the financial statements of the registrants and their respective tax bases, which give rise to deferred tax assets and liabilities, are as follows:
 
December 31, 2018
 
Southern Company
Alabama Power
Georgia
Power
Mississippi Power
Southern Power
Southern Company Gas
 
(in millions)
Deferred tax liabilities —
 
 

 
 
 
Accelerated depreciation
$
8,461

$
2,236

$
3,005

$
335

$
1,483

$
1,176

Property basis differences
1,807

865

633

162


134

Federal effect of net state deferred tax assets



36



Leveraged lease basis differences
253






Employee benefit obligations
477

149

290

25

6

6

Premium on reacquired debt
88

14

74




Regulatory assets –
 
 
 
 
 
 
Storm damage reserves
111


111




Employee benefit obligations
975

260

344

45


45

AROs
1,232

276

925

31



AROs
1,210

607

575




Other
593

177

141

68

34

132

Total deferred income tax liabilities
15,207

4,584

6,098

702

1,523

1,493

Deferred tax assets —
 
 
 
 
 
 
Federal effect of net state deferred tax liabilities
260

155

71


22

46

Employee benefit obligations
1,273

286

444

62

7

150

Other property basis differences
251


61


172


ITC and PTC carryforward
2,730

11

430


2,128


Alternative minimum tax carryforward
62



32

21


Other partnership basis difference
162




162


Other comprehensive losses
82

10

3




AROs
2,442

883

1,500

31



Estimated loss on plants under construction
346


283

63



Other deferred state tax attributes
415


19

251

72


Regulatory liability associated with the Tax Reform Legislation (not subject to normalization)
294

130

127

29


8

Other
731

147

140

47

47

285

Total deferred income tax assets
9,048

1,622

3,078

515

2,631

489

Valuation allowance
(123
)

(42
)
(41
)
(27
)
(12
)
Net deferred income tax assets
8,925

1,622

3,036

474

2,604

477

Net deferred income taxes (assets)/liabilities
$
6,282

$
2,962

$
3,062

$
228

$
(1,081
)
$
1,016

 
 
 


 
 
 
Recognized in the balance sheets:
 
 


 
 
 
Accumulated deferred income
taxes – assets
$
(276
)
$

$

$
(150
)
$
(1,186
)
$

Accumulated deferred income
taxes – liabilities
$
6,558

$
2,962

$
3,062

$
378

$
105

$
1,016


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Southern Company and Subsidiary Companies 2018 Annual Report

 
December 31, 2017
 
Southern Company
Alabama Power
Georgia
Power
Mississippi Power
Southern Power
Southern Company Gas
 
(in millions)
Deferred tax liabilities —
 
 
 
 
 
 
Accelerated depreciation
$
9,059

$
2,135

$
2,889

$
303

$
1,922

$
1,150

Property basis differences
1,853

725

606

207

2

204

Federal effect of net state deferred tax assets



9



Leveraged lease basis differences
251






Employee benefit obligations
527

162

287

28

7

4

Premium on reacquired debt
54

16

34




Regulatory assets –
 
 
 
 
 
 
Storm damage reserves
89


89




Employee benefit obligations
1,044

260

349

46


75

AROs
821

249

501

33



AROs
370

220

130




Other
689

147

140

73

30

208

Total deferred income tax liabilities
14,757

3,914

5,025

699

1,961

1,641

Deferred tax assets —
 
 
 
 
 
 
Federal effect of net state deferred tax liabilities
330

143

85


42

54

Employee benefit obligations
1,339

286

448

62

8

185

Other property basis differences
343


59


184


ITC and PTC carryforward
2,414

9

403


2,002


Federal NOL carryforward
518



40

333

92

Alternative minimum tax carryforward
69



32

21


Other partnership basis difference
23




23


Other comprehensive losses
84

10

4


1


AROs
1,191

469

631

33



Estimated loss on plants under construction
722



722



Other deferred state tax attributes
330


6

133

77


Regulatory liability associated with the Tax Reform Legislation (not subject to normalization)
304

126

123

27


9

Other
538

111

91

54

9

223

Total deferred income tax assets
8,205

1,154

1,850

1,103

2,700

563

Valuation allowance
(184
)


(157
)
(13
)
(11
)
Net deferred income tax assets
8,021

1,154

1,850

946

2,687

552

Net deferred income taxes (assets)/liabilities
$
6,736

$
2,760

$
3,175

$
(247
)
$
(726
)
$
1,089

 
 
 
 
 
 
 
Recognized in the balance sheets:
 
 
 
 
 
 
Accumulated deferred income
taxes – assets
$
(106
)
$

$

$
(247
)
$
(925
)
$

Accumulated deferred income
taxes – liabilities
$
6,842

$
2,760

$
3,175

$

$
199

$
1,089

The implementation of the Tax Reform Legislation significantly reduced accumulated deferred income taxes in 2017, partially offset by bonus depreciation provisions in the PATH Act.
The traditional electric operating companies and natural gas distribution utilities have tax-related regulatory assets (deferred income tax charges) and regulatory liabilities (deferred income tax credits). The regulatory assets are primarily attributable to tax benefits flowed through to customers in prior years, deferred taxes previously recognized at rates lower than the current enacted

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Southern Company and Subsidiary Companies 2018 Annual Report

tax law, and taxes applicable to capitalized interest. The regulatory liabilities are primarily attributable to deferred taxes previously recognized at rates higher than the current enacted tax law and to unamortized ITCs. See Note 2 for each registrant's related balances at December 31, 2018 and 2017 .
Tax Credit Carryforwards
Federal ITC/PTC carryforwards at December 31, 2018 were as follows:
 
Southern Company
Alabama
Power
Georgia
Power
Southern
Power
 
(in millions)
Federal ITC/PTC carryforwards
$
2,410

$
11

$
108

$
2,128

Year in which federal ITC/PTC carryforwards begin expiring
2032

2033

2032

2034

Year by which federal ITC/PTC carryforwards are expected to be utilized
2022

2021

2021

2022

The estimated tax credit utilization reflects the 2018 abandonment loss related to certain Kemper County energy facility expenditures as well as the projected taxable gains on the various sale transactions described in Note 15 and "Legal Entity Reorganizations" herein. The expected utilization of tax credit carryforwards could be further delayed by numerous factors, including the acquisition of additional renewable projects, the purchase of rights to additional PTCs of Plant Vogtle Units 3 and 4 pursuant to the MEAG Funding Agreement or the Global Amendments, and changes in taxable income projections. See Note 2 under " Georgia Power Nuclear Construction " for additional information on Plant Vogtle Units 3 and 4.
At December 31, 2018 , Georgia Power also had approximately $341 million in state investment and other state tax credit carryforwards for the State of Georgia that will expire between 2020 and 2028 and are not expected to be fully utilized. Georgia Power has a net state valuation allowance of $33 million associated with these carryforwards.
The ultimate outcome of these matters cannot be determined at this time.

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Southern Company and Subsidiary Companies 2018 Annual Report

Net Operating Loss Carryforwards
In the 2018 tax year, Southern Company expects to fully utilize the carryforward from federal NOLs generated in 2016 and 2017.
At December 31, 2018 , the state and local NOL carryforwards for Southern Company's subsidiaries were as follows:
Company/Jurisdiction
Approximate NOL Carryforwards
Approximate Net State Income Tax Benefit
Tax Year NOL
Begins Expiring
 
(in millions)
 
Mississippi Power
 
 
 
Mississippi
$
5,062

$
200

2031
 
 
 
 
Southern Power
 
 
 
Oklahoma
846

40

2035
Florida
264

11

2033
South Carolina
62

2

2034
Other states
42

3

2029
Southern Power Total
$
1,214

$
56

 
 
 
 
 
Other (*)
 
 
 
Georgia
358

16

2019
New York
223

11

2036
New York City
208

15

2036
Other states
278

14

Various
Southern Company Total
$
7,343

$
312


(*)
Represents other Southern Company subsidiaries. Alabama Power, Georgia Power, and Southern Company Gas did not have state NOL carryforwards at December 31, 2018 .
State NOLs for Mississippi, Oklahoma, and Florida are not expected to be fully utilized prior to expiration. At December 31, 2018, Mississippi Power had a net state valuation allowance of $32 million for the Mississippi NOL and Southern Power had a net state valuation allowance of $9 million for the Oklahoma NOL and $11 million for the Florida NOL.
The ultimate outcome of these matters cannot be determined at this time.

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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

Unrecognized Tax Benefits
Unrecognized tax benefits changes in 2018 , 2017 , and 2016 for Southern Company, Mississippi Power, and Southern Power are provided below. The remaining registrants did not have any material unrecognized tax benefits for the periods presented.
 
Southern Company
Mississippi Power
Southern Power
 
(in millions)
Unrecognized tax benefits at December 31, 2015
$
433

$
421

$
8

Tax positions changes –
 
 
 
Increase from current periods
45

26

17

Increase from prior periods
21

18


Decrease from prior periods
(15
)

(8
)
Unrecognized tax benefits at December 31, 2016
484

465

17

Tax positions changes –
 
 
 
Increase from current periods
10



Increase from prior periods
10

2


Decrease from prior periods
(196
)
(177
)
(17
)
Reductions due to settlements
(290
)
(290
)

Unrecognized tax benefits at December 31, 2017
18



Tax positions changes –
 
 
 
Decrease from prior periods
(18
)


Unrecognized tax benefits at December 31, 2018
$

$

$

Mississippi Power's tax positions increase from current and prior periods for 2017 and 2016 relate to state tax benefits, deductions for R&E expenditures, and charitable contribution carryforwards that were impacted as a result of the settlement of R&E expenditures associated with the Kemper County energy facility, as well as federal income tax benefits from deferred ITCs. Mississippi Power's tax positions decrease from prior periods and the reductions due to settlements for 2017 relate primarily to the settlement of R&E expenditures associated with the Kemper County energy facility. See Note 2 under " Mississippi Power Kemper County Energy Facility " and " Section 174 Research and Experimental Deduction " herein for more information.
Southern Power's increase in unrecognized tax benefits from current periods for 2016, and the decrease from prior periods for 2017 and 2016, primarily relate to federal income tax benefits from deferred ITCs.
There were no unrecognized tax benefits at December 31, 2018. The impact on the effective tax rate of Southern Company, Mississippi Power, and Southern Power, if recognized, was as follows for 2017 and 2016:
 
Southern Company
Mississippi Power
Southern Power
 
(in millions)
2017
 
 
 
Tax positions impacting the effective tax rate
$
18

$

$

Tax positions not impacting the effective tax rate



Balance of unrecognized tax benefits
$
18

$

$

 
 
 
 
2016
 
 
 
Tax positions impacting the effective tax rate
$
20

$
1

$
17

Tax positions not impacting the effective tax rate
464

464


Balance of unrecognized tax benefits
$
484

$
465

$
17

Mississippi Power's tax positions not impacting the effective tax rate for 2016 relate to deductions for R&E expenditures associated with the Kemper County energy facility. See " Section 174 Research and Experimental Deduction " herein for more information. These amounts are presented on a gross basis without considering the related federal or state income tax impact.

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Southern Company and Subsidiary Companies 2018 Annual Report

Southern Power's impact on the effective tax rate was determined based on the amount of ITCs, which were uncertain.
All of the registrants classify interest on tax uncertainties as interest expense. Accrued interest for all tax positions other than the Section 174 R&E deductions was immaterial for all years presented. None of the registrants accrued any penalties on uncertain tax positions.
It is reasonably possible that the amount of the unrecognized tax benefits could change within 12 months . New audit findings or settlements associated with ongoing audits could result in significant unrecognized tax benefits. At this time, a range of reasonably possible outcomes cannot be determined.
The IRS has finalized its audits of Southern Company's consolidated federal income tax returns through 2017, as well as the pre-Merger Southern Company Gas tax returns. Southern Company is a participant in the Compliance Assurance Process of the IRS. The audits for the registrants' state income tax returns have either been concluded, or the statute of limitations has expired, for years prior to 2012.
Section 174 Research and Experimental Deduction
Southern Company, on behalf of Mississippi Power, has reflected deductions for R&E expenditures related to the Kemper County energy facility in its federal income tax calculations since 2013 and filed amended federal income tax returns for 2008 through 2013 to also include such deductions. In September 2017, the U.S. Congress Joint Committee on Taxation approved a settlement between Southern Company and the IRS, resolving a methodology for these deductions. As a result of this approval, Mississippi Power recognized $176 million in 2017 of previously unrecognized tax benefits and reversed $36 million of associated accrued interest.
11 . RETIREMENT BENEFITS
The Southern Company system has a qualified defined benefit, trusteed, pension plan covering substantially all employees, with the exception of employees at PowerSecure. The qualified defined benefit pension plan is funded in accordance with requirements of the Employee Retirement Income Security Act of 1974, as amended (ERISA). No contributions to the qualified pension plan were made for the year ended December 31, 2018 and no mandatory contributions to the qualified pension plan are anticipated for the year ending December 31, 2019 . The Southern Company system also provides certain non-qualified defined benefits for a select group of management and highly compensated employees, which are funded on a cash basis. In addition, the Southern Company system provides certain medical care and life insurance benefits for retired employees through other postretirement benefit plans. The traditional electric operating companies fund other postretirement trusts to the extent required by their respective regulatory commissions. Southern Company Gas has a separate unfunded supplemental retirement health care plan that provides medical care and life insurance benefits to employees of discontinued businesses. For the year ending December 31, 2019 , no other postretirement trust contributions are expected.
On January 1, 2018, the qualified defined benefit pension plan of Southern Company Gas was merged into the Southern Company system's qualified defined benefit pension plan and the pension plan was reopened to all non-union employees of Southern Company Gas. Prior to January 1, 2018, Southern Company Gas had a separate qualified defined benefit, trusteed, pension plan covering certain eligible employees, which was closed in 2012 to new employees. Also on January 1, 2018, Southern Company Gas' non-qualified retirement plans were merged into the Southern Company system's non-qualified retirement plan (defined benefit and defined contribution).
Effective in December 2017, 538 employees transferred from SCS to Southern Power. Accordingly, Southern Power assumed various compensation and benefit plans including participation in the Southern Company system's qualified defined benefit, trusteed, pension plan covering substantially all employees. With the transfer of employees, Southern Power assumed the related benefit obligations from SCS of $139 million for the qualified pension plan (along with trust assets of $138 million ) and $11 million for other postretirement benefit plans, together with $36 million in prior service costs and net gains/losses in OCI. In 2018, Southern Power also began providing certain defined benefits under the non-qualified pension plan for a select group of management and highly compensated employees. No obligation related to these benefits was assumed in the employee transfer; however, obligations for services rendered by employees following the transfer are being recognized by Southern Power and are funded on a cash basis. In addition, Southern Power provides certain medical care and life insurance benefits for retired employees through other postretirement benefit plans that are funded on a cash basis. Prior to the transfer of employees in December 2017, substantially all expenses charged by SCS, including pension and other postretirement benefit costs, were recorded in Southern Power's other operations and maintenance expense. The disclosures included herein exclude Southern Power for periods prior to the transfer of employees in December 2017.
On January 1, 2019, Southern Company completed the sale of Gulf Power to NextEra Energy. See Note 15 under " Southern Company's Sale of Gulf Power " for additional information. The portion of the Southern Company system's pension and other

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Southern Company and Subsidiary Companies 2018 Annual Report

postretirement benefit plans attributable to Gulf Power that is reflected in Southern Company's consolidated balance sheet as held for sale at December 31, 2018 consists of:
 
Pension
Plans
Other Postretirement Benefit Plans
 
(in millions)
Projected benefit obligation
$
526

$
69

Plan assets
492

17

Accrued liability
$
(34
)
$
(52
)
All amounts presented in the remainder of this note reflect the benefit plan obligations and related plan assets for the Southern Company system's pension and other postretirement benefit plans, including the amounts attributable to Gulf Power.
Actuarial Assumptions
The weighted average rates assumed in the actuarial calculations used to determine both the net periodic costs for the pension and other postretirement benefit plans for the following year and the benefit obligations as of the measurement date are presented below.
 
2018
Assumptions used to determine net
periodic costs:
Southern Company
Alabama Power
Georgia
Power
Mississippi Power
Southern Power
Pension plans
 
 
 
 
 
Discount rate – benefit obligations
3.80
%
3.81
%
3.79
%
3.80
%
3.94
%
Discount rate – interest costs
3.45

3.45

3.42

3.46

3.69

Discount rate – service costs
3.98

4.00

3.99

3.99

4.01

Expected long-term return on plan assets
7.95

7.95

7.95

7.95

7.95

Annual salary increase
4.34

4.46

4.46

4.46

4.46

Other postretirement benefit plans
 
 
 
 
 
Discount rate – benefit obligations
3.68
%
3.71
%
3.68
%
3.68
%
3.81
%
Discount rate – interest costs
3.29

3.31

3.29

3.29

3.47

Discount rate – service costs
3.91

3.93

3.91

3.91

3.93

Expected long-term return on plan assets
6.83

6.83

6.80

6.99


Annual salary increase
4.34

4.46

4.46

4.46

4.46


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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

 
2017
Assumptions used to determine net
periodic costs:
Southern Company
Alabama
Power
Georgia
Power
Mississippi Power
Pension plans
 
 
 
 
Discount rate – benefit obligations
4.40
%
4.44
%
4.40
%
4.44
%
Discount rate – interest costs
3.77

3.76

3.72

3.81

Discount rate – service costs
4.81

4.85

4.83

4.83

Expected long-term return on plan assets
7.92

7.95

7.95

7.95

Annual salary increase
4.37

4.46

4.46

4.46

Other postretirement benefit plans
 
 
 
 
Discount rate – benefit obligations
4.23
%
4.27
%
4.23
%
4.22
%
Discount rate – interest costs
3.54

3.58

3.55

3.55

Discount rate – service costs
4.64

4.70

4.63

4.65

Expected long-term return on plan assets
6.84

6.83

6.79

6.88

Annual salary increase
4.37

4.46

4.46

4.46

 
2016
Assumptions used to determine net periodic costs:
Southern Company
Alabama
Power
Georgia
Power
Mississippi Power
Pension plans
 
 
 
 
Discount rate – benefit obligations
4.58
%
4.67
%
4.65
%
4.69
%
Discount rate – interest costs
3.88

3.90

3.86

3.97

Discount rate – service costs
4.98

5.07

5.03

5.04

Expected long-term return on plan assets
8.16

8.20

8.20

8.20

Annual salary increase
4.37

4.46

4.46

4.46

Other postretirement benefit plans
 
 
 
 
Discount rate – benefit obligations
4.38
%
4.51
%
4.49
%
4.47
%
Discount rate – interest costs
3.66

3.69

3.67

3.66

Discount rate – service costs
4.85

4.96

4.88

4.88

Expected long-term return on plan assets
6.66

6.83

6.27

7.07

Annual salary increase
4.37

4.46

4.46

4.46


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Southern Company and Subsidiary Companies 2018 Annual Report

 
Southern Company Gas
 
Successor
 
 
Predecessor
Assumptions used to determine net periodic costs:
Year Ended December 31, 2018
Year Ended December 31, 2017
July 1, 2016
through
December 31, 2016
 
 
January 1, 2016
through
June 30, 2016
Pension plans
 
 
 
 
 
 
Discount rate – benefit obligations
3.74
%
4.39
%
3.85
%
 
 
4.60
%
Discount rate – interest costs
3.41

3.76

3.21

 
 
4.00

Discount rate – service costs
3.84

4.64

4.07

 
 
4.80

Expected long-term return on plan assets
7.95

7.60

7.75

 
 
7.80

Annual salary increase
3.07

3.50

3.50

 
 
3.70

Pension band increase (*)
N/A

N/A

2.00

 
 
2.00

Other postretirement benefit plans
 
 
 
 
 
 
Discount rate - benefit obligations
3.62
%
4.15
%
3.61
%
 
 
4.40
%
Discount rate – interest costs
3.21

3.40

2.84

 
 
3.60

Discount rate – service costs
3.82

4.55

3.96

 
 
4.70

Expected long-term return on plan assets
5.89

6.03

5.93

 
 
6.60

Annual salary increase
3.07

3.50

3.50

 
 
3.70

(*)
Only applicable to Nicor Gas union employees. The pension bands for the former Nicor Gas plan reflect the negotiated rates in accordance with the union agreements.
 
2018
Assumptions used to determine benefit obligations:
Southern Company
Alabama Power
Georgia Power
Mississippi Power
Southern Power
Southern Company Gas
Pension plans
 
 
 
 
 
 
Discount rate
4.49
%
4.51
%
4.48
%
4.49
%
4.65
%
4.47
%
Annual salary increase
4.34

4.46

4.46

4.46

4.46

3.07

Other postretirement benefit plans
 
 
 
 
 
 
Discount rate
4.37
%
4.40
%
4.36
%
4.35
%
4.50
%
4.32
%
Annual salary increase
4.34

4.46

4.46

4.46

4.46

3.07

 
2017
Assumptions used to determine benefit obligations:
Southern Company
Alabama Power
Georgia Power
Mississippi Power
Southern Power
Southern Company Gas
Pension plans
 
 
 
 
 
 
Discount rate
3.80
%
3.81
%
3.79
%
3.80
%
3.94
%
3.74
%
Annual salary increase
4.32

4.46

4.46

4.46

4.46

2.88

Other postretirement benefit plans
 
 
 
 
 
 
Discount rate
3.68
%
3.71
%
3.68
%
3.68
%
3.81
%
3.62
%
Annual salary increase
4.32

4.46

4.46

4.46

4.46

2.56

The registrants estimate the expected rate of return on pension plan and other postretirement benefit plan assets using a financial model to project the expected return on each current investment portfolio. The analysis projects an expected rate of return on each of the different asset classes in order to arrive at the expected return on the entire portfolio relying on each trust's target asset allocation and reasonable capital market assumptions. The financial model is based on four key inputs: anticipated returns by asset class (based in part on historical returns), each trust's target asset allocation, an anticipated inflation rate, and the projected impact of a periodic rebalancing of each trust's portfolio.

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Southern Company and Subsidiary Companies 2018 Annual Report

An additional assumption used in measuring the accumulated other postretirement benefit obligations (APBO) was a weighted average medical care cost trend rate. The weighted average medical care cost trend rates used in measuring the APBO for the registrants at December 31, 2018 were as follows:
 
Initial Cost Trend Rate
 
Ultimate Cost Trend Rate
 
Year That Ultimate Rate is Reached
Pre-65
6.50
%
 
4.50
%
 
2028
Post-65 medical
5.00

 
4.50

 
2028
Post-65 prescription
8.00

 
4.50

 
2028
Pension Plans
The total accumulated benefit obligation for the pension plans at December 31, 2018 and 2017 was as follows:
 
Southern Company
Alabama Power
Georgia Power
Mississippi Power
Southern Power
Southern Company Gas
 
(in millions)
December 31, 2018
$
11,683

$
2,550

$
3,613

$
513

$
101

$
842

December 31, 2017
12,577

2,696

3,847

541

111

1,139

The actuarial gain of $1.1 billion recorded in the remeasurement of the Southern Company system pension plans at December 31, 2018 was primarily due to a 69 basis point increase in the overall discount rate used to calculate the benefit obligation as a result of higher market interest rates. The actuarial loss of $1.3 billion recorded in the remeasurement of the Southern Company system pension plans at December 31, 2017 was primarily due to a 60 basis point decrease in the overall discount rate used to calculate the benefit obligation as a result of lower market interest rates.
Changes in the projected benefit obligations and the fair value of plan assets during the plan years ended December 31, 2018 and 2017 were as follows:
 
2018
 
Southern Company
Alabama Power
Georgia
Power
Mississippi Power
Southern Power
Southern Company Gas
 
(in millions)
Change in benefit obligation
 
 
 
 
 
 
Benefit obligation at beginning of year
$
13,808

$
2,998

$
4,188

$
602

$
139

$
1,184

Dispositions
(107
)



(3
)
(104
)
Service cost
359

78

87

17

9

34

Interest cost
464

101

139

20

5

39

Benefits paid
(618
)
(124
)
(191
)
(24
)
(3
)
(98
)
Actuarial (gain) loss
(1,143
)
(237
)
(318
)
(58
)
(24
)
(148
)
Balance at end of year
12,763

2,816

3,905

557

123

907

Change in plan assets
 
 
 
 
 
 
Fair value of plan assets at beginning of year
12,992

2,836

4,058

563

138

1,068

Dispositions
(107
)



(3
)
(104
)
Actual return (loss) on plan assets
(711
)
(150
)
(218
)
(37
)
(9
)
(70
)
Employer contributions
55

13

14

3


2

Benefits paid
(618
)
(124
)
(191
)
(24
)
(3
)
(98
)
Fair value of plan assets at end of year
11,611

2,575

3,663

505

123

798

Accrued liability
$
(1,152
)
$
(241
)
$
(242
)
$
(52
)
$

$
(109
)

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Southern Company and Subsidiary Companies 2018 Annual Report

 
2017
 
Southern Company
Alabama Power
Georgia
Power
Mississippi Power
Southern Power
Southern Company Gas
 
(in millions)
Change in benefit obligation
 
 
 
 
 
 
Benefit obligation at beginning of year
$
12,385

$
2,663

$
3,800

$
534

$

$
1,133

Service cost
293

63

74

15


23

Interest cost
455

98

138

20


42

Benefits paid
(596
)
(120
)
(187
)
(22
)

(91
)
Plan amendments
(26
)




(26
)
Actuarial (gain) loss
1,297

294

363

55


103

Obligations assumed from employee transfer




139


Balance at end of year
13,808

2,998

4,188

602

139

1,184

Change in plan assets
 
 
 
 
 
 
Fair value of plan assets at beginning of year
11,583

2,517

3,621

499


983

Actual return (loss) on plan assets
1,953

427

610

84


175

Employer contributions
52

12

14

2


1

Benefits paid
(596
)
(120
)
(187
)
(22
)

(91
)
Assets assumed from employee transfer




138


Fair value of plan assets at end of year
12,992

2,836

4,058

563

138

1,068

Accrued liability
$
(816
)
$
(162
)
$
(130
)
$
(39
)
$
(1
)
$
(116
)
The projected benefit obligations for the qualified and non-qualified pension plans at December 31, 2018 are shown in the following table. All pension plan assets are related to the qualified pension plan.
 
Southern Company
Alabama Power
Georgia Power
Mississippi Power
Southern Power
Southern Company Gas
 
(in millions)
Projected benefit obligations:
 
 
 
 
 
 
Qualified pension plan
$
12,135

$
2,692

$
3,757

$
527

$
122

$
866

Non-qualified pension plan
629

124

148

30

1

41


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Southern Company and Subsidiary Companies 2018 Annual Report

Amounts recognized in the balance sheets at December 31, 2018 and 2017 related to the registrants' pension plans consist of the following:
 
Southern
  Company (*)
Alabama Power
Georgia
Power
Mississippi Power
Southern Power
Southern Company Gas
 
(in millions)
December 31, 2018:
 
 
 
 
 
 
Prepaid pension costs
$

$

$

$

$
1

$

Other regulatory assets, deferred
3,566

955

1,230

167


160

Other deferred charges and assets





74

Other current liabilities
(55
)
(12
)
(15
)
(3
)

(3
)
Employee benefit obligations
(1,097
)
(229
)
(227
)
(49
)
(1
)
(179
)
Other regulatory liabilities, deferred
(108
)





AOCI
97




26

(44
)
 
 
 
 
 
 
 
December 31, 2017:
 
 
 
 
 
 
Prepaid pension costs
$

$

$
23

$

$

$

Other regulatory assets, deferred
3,273

890

1,105

158


217

Other deferred charges and assets





85

Other current liabilities
(53
)
(12
)
(15
)
(3
)

(3
)
Employee benefit obligations
(763
)
(150
)
(138
)
(36
)
(1
)
(198
)
Other regulatory liabilities, deferred
(118
)





AOCI
107




33

(42
)
(*)
Amounts for Southern Company exclude regulatory assets of $268 million associated with unamortized amounts in Southern Company Gas' pension plans prior to its acquisition by Southern Company on July 1, 2016.
Presented below are the amounts included in regulatory assets at December 31, 2018 and 2017 related to the portion of the defined benefit pension plan attributable to Southern Company, the traditional electric operating companies, and Southern Company Gas that had not yet been recognized in net periodic pension cost.
 
Southern
Company
(*)
Alabama Power
Georgia
Power
Mississippi Power
Southern Company Gas
 
(in millions)
Balance at December 31, 2018
 
 
 
 
 
Regulatory assets:
 
 
 
 
 
Prior service cost
$
17

$
6

$
12

$
2

$
(17
)
Net (gain) loss
3,441

949

1,218

165

83

Regulatory amortization (*)




94

Total regulatory assets (liabilities)
$
3,458

$
955

$
1,230

$
167

$
160

 
 
 
 
 
 
Balance at December 31, 2017
 
 
 
 
 
Regulatory assets:
 
 
 
 
 
Prior service cost
$
14

$
8

$
14

$
3

$
(20
)
Net (gain) loss
3,140

882

1,091

155

197

Regulatory amortization (*)




40

Total regulatory assets
$
3,154

$
890

$
1,105

$
158

$
217

(*)
Amounts for Southern Company exclude regulatory assets of $268 million associated with unamortized amounts in Southern Company Gas' pension plans prior to its acquisition by Southern Company on July 1, 2016.

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Southern Company and Subsidiary Companies 2018 Annual Report

The changes in the balance of regulatory assets related to the portion of the defined benefit pension plan attributable to Southern Company, the traditional electric operating companies, and Southern Company Gas for the years ended December 31, 2018 and 2017 are presented in the following table:
 
Southern
Company
(*)
Alabama Power
Georgia
Power
Mississippi Power
Southern Company Gas
 
(in millions)
Regulatory assets (liabilities):
 
 
 
 
 
Balance at December 31, 2016
$
3,120

$
870

$
1,129

$
154

$
267

Net (gain) loss
227

64

36

12

(31
)
Change in prior service costs
(26
)




Reclassification adjustments:
 
 
 
 
 
Amortization of prior service costs
(11
)
(2
)
(3
)
(1
)

Amortization of net gain (loss)
(155
)
(42
)
(57
)
(7
)
(18
)
Amortization of regulatory assets (*)




(1
)
Total reclassification adjustments
(166
)
(44
)
(60
)
(8
)
(19
)
Total change
35

20

(24
)
4

(50
)
Balance at December 31, 2017
$
3,155

$
890

$
1,105

$
158

$
217

Net (gain) loss
498

120

196

19

20

Change in prior service costs
1




(18
)
Dispositions
12




(34
)
Reclassification adjustments:
 
 
 
 
 
Amortization of prior service costs
(4
)
(1
)
(2
)

2

Amortization of net gain (loss)
(204
)
(54
)
(69
)
(10
)
(12
)
Amortization of regulatory assets




(15
)
Total reclassification adjustments
(208
)
(55
)
(71
)
(10
)
(25
)
Total change
303

65

125

9

(57
)
Balance at December 31, 2018
$
3,458

$
955

$
1,230

$
167

$
160

(*)
Amounts for Southern Company exclude regulatory assets of $268 million associated with unamortized amounts in Southern Company Gas' pension plans prior to its acquisition by Southern Company on July 1, 2016.

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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

Presented below are the amounts included in AOCI at December 31, 2018 and 2017 related to the portion of the defined benefit pension plan attributable to Southern Company, Southern Power, and Southern Company Gas that had not yet been recognized in net periodic pension cost.
 
Southern
Company
Southern
Power
Southern Company
Gas
 
(in millions)
Balance at December 31, 2018
 
 
 
AOCI:
 
 
 
Prior service cost
$
(3
)
$

$
(6
)
Net (gain) loss
100

26

(38
)
Total AOCI
$
97

$
26

$
(44
)
 
 
 
 
Balance at December 31, 2017
 
 
 
AOCI:
 
 
 
Prior service cost
$
3

$
1

$

Net (gain) loss
104

32

(42
)
Total AOCI
$
107

$
33

$
(42
)
The components of OCI related to the portion of the defined benefit pension plan attributable to Southern Company, Southern Power, and Southern Company Gas for the years ended December 31, 2018 and 2017 are presented in the following table:
 
Southern Company
Southern
Power
Southern Company
Gas
 
(in millions)
AOCI:
 
 
 
Balance at December 31, 2016
$
100

$

$
(43
)
Net (gain) loss
15


1

Change from employee transfer

33


Reclassification adjustments:
 
 
 
Amortization of prior service costs
(1
)


Amortization of net gain (loss)
(7
)


Total reclassification adjustments
(8
)


Total change
7

33

1

Balance at December 31, 2017
$
107

$
33

$
(42
)
Net (gain) loss
7

(5
)
6

Dispositions
(8
)

(8
)
Reclassification adjustments:
 
 
 
Amortization of net gain (loss)
(9
)
(2
)

Total reclassification adjustments
(9
)
(2
)

Total change
(10
)
(7
)
(2
)
Balance at December 31, 2018
$
97

$
26

$
(44
)

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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

Components of net periodic pension cost for Southern Company, the traditional electric operating companies, and Southern Power were as follows:
 
Southern Company
Alabama Power
Georgia
Power
Mississippi Power
Southern Power
 
(in millions)
2018:
 
 
 
 
 
Service cost
$
359

$
78

$
87

$
17

$
9

Interest cost
464

101

139

20

5

Expected return on plan assets
(943
)
(207
)
(296
)
(41
)
(10
)
Recognized net (gain) loss
213

54

69

10

1

Net amortization
4

1

2



Net periodic pension cost
$
97

$
27

$
1

$
6

$
5

 
 
 
 
 
 
2017:
 
 
 
 
 
Service cost
$
293

$
63

$
74

$
15

 
Interest cost
455

98

138

20

 
Expected return on plan assets
(897
)
(196
)
(283
)
(40
)
 
Recognized net (gain) loss
162

42

57

7

 
Net amortization
12

2

3

1

 
Net periodic pension cost
$
25

$
9

$
(11
)
$
3

 
 
 
 
 
 
 
2016:
 
 
 
 
 
Service cost
$
262

$
57

$
70

$
13

 
Interest cost
422

95

136

19

 
Expected return on plan assets
(782
)
(184
)
(258
)
(35
)
 
Recognized net (gain) loss
150

40

55

7

 
Net amortization
14

3

5

1

 
Net periodic pension cost
$
66

$
11

$
8

$
5

 
Components of net periodic pension cost for Southern Company Gas were as follows:
 
Southern Company Gas
 
Successor
 
 
Predecessor
 
Year Ended December 31, 2018
Year Ended December 31, 2017
July 1, 2016
through
December 31, 2016
 
 
January 1, 2016
through
June 30, 2016
 
(in millions)
 
 
(in millions)
Service cost
$
34

$
23

$
15

 
 
$
13

Interest cost
39

42

20

 
 
21

Expected return on plan assets
(75
)
(70
)
(35
)
 
 
(33
)
Recognized net (gain) loss
12

18

14

 
 
13

Net amortization of regulatory asset
15

1


 
 

Prior service cost
(2
)

(1
)
 
 
(1
)
Net periodic pension cost
$
23

$
14

$
13

 
 
$
13

Net periodic pension cost is the sum of service cost, interest cost, and other costs netted against the expected return on plan assets. The expected return on plan assets is determined by multiplying the expected rate of return on plan assets and the market-related value of plan assets. In determining the market-related value of plan assets, the registrants have elected to amortize changes in the

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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

market value of all plan assets over five years rather than recognize the changes immediately. As a result, the accounting value of plan assets that is used to calculate the expected return on plan assets differs from the current fair value of the plan assets.
Future benefit payments reflect expected future service and are estimated based on assumptions used to measure the projected benefit obligation for the pension plans. At December 31, 2018 , estimated benefit payments were as follows:
 
Southern Company
Alabama Power
Georgia
Power
Mississippi Power
Southern Power
Southern Company Gas
 
(in millions)
Benefit Payments:
 
 
 
 
 
 
2019
$
623

$
132

$
201

$
28

$
3

$
59

2020
645

136

206

28

3

61

2021
664

141

209

29

4

62

2022
687

147

215

29

4

62

2023
711

152

221

30

5

62

2024 to 2028
3,869

832

1,183

166

27

313

Other Postretirement Benefits
Changes in the APBO and the fair value of the registrants' plan assets during the plan years ended December 31, 2018 and 2017 were as follows:
 
2018
 
Southern Company
Alabama Power
Georgia
Power
Mississippi Power
Southern Power
Southern Company Gas
 
(in millions)
Change in benefit obligation
 
 
 
 
 
 
Benefit obligation at beginning of year
$
2,339

$
517

$
863

$
97

$
11

$
310

Dispositions
(18
)




(18
)
Service cost
24

6

6

1

1

2

Interest cost
75

17

28

3


10

Benefits paid
(129
)
(28
)
(47
)
(5
)
(1
)
(17
)
Actuarial (gain) loss
(432
)
(111
)
(178
)
(15
)
(2
)
(43
)
Retiree drug subsidy
6

2

3




Balance at end of year
1,865

403

675

81

9

244

Change in plan assets
 
 
 
 
 
 
Fair value of plan assets at beginning of year
1,053

406

386

25


125

Dispositions
(18
)




(18
)
Actual return (loss) on plan assets
(57
)
(25
)
(20
)
(1
)

(5
)
Employer contributions
73

5

22

4

1

13

Benefits paid
(123
)
(26
)
(44
)
(5
)
(1
)
(17
)
Fair value of plan assets at end of year
928

360

344

23


98

Accrued liability
$
(937
)
$
(43
)
$
(331
)
$
(58
)
$
(9
)
$
(146
)

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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

 
2017
 
Southern Company
Alabama Power
Georgia
Power
Mississippi Power
Southern Power
Southern Company Gas
 
(in millions)
Change in benefit obligation
 
 
 
 
 
 
Benefit obligation at beginning of year
$
2,297

$
501

$
847

$
97

$

$
308

Service cost
24

6

7

1


2

Interest cost
79

17

29

3


10

Benefits paid
(136
)
(29
)
(51
)
(6
)

(19
)
Actuarial (gain) loss
65

20

28

1


3

Plan amendments
3





3

Retiree drug subsidy
7

2

3

1



Obligations assumed from employee transfer




11


Employee contributions





3

Balance at end of year
2,339

517

863

97

11

310

Change in plan assets
 
 
 
 
 
 
Fair value of plan assets at beginning of year
944

367

354

23


105

Actual return (loss) on plan assets
154

60

54

3


20

Employer contributions
84

6

26

4


17

Employee contributions





3

Benefits paid
(129
)
(27
)
(48
)
(5
)

(20
)
Fair value of plan assets at end of year
1,053

406

386

25


125

Accrued liability
$
(1,286
)
$
(111
)
$
(477
)
$
(72
)
$
(11
)
$
(185
)
Amounts recognized in the balance sheets at December 31, 2018 and 2017 related to the registrants' other postretirement benefit plans consist of the following:
 
Southern
Company
(a)
Alabama Power
Georgia
Power
Mississippi Power
Southern
  Power
Southern Company Gas
 
(in millions)
December 31, 2018:
 
 
 
 
 
 
Other regulatory assets, deferred (a)
$
99

$

$
60

$
6

$

$
(4
)
Other current liabilities
(6
)





Employee benefit obligations (b)
(931
)
(43
)
(331
)
(58
)
(9
)
146

Other regulatory liabilities, deferred
(77
)
(8
)

(2
)


AOCI
(4
)



1

(4
)
 
 
 
 
 
 
 
December 31, 2017:
 
 
 
 
 
 
Other regulatory assets, deferred (a)
$
382

$
63

$
202

$
18

$

$
46

Other current liabilities
(5
)





Employee benefit obligations (b)
(1,281
)
(111
)
(477
)
(72
)
(11
)
(185
)
Other regulatory liabilities, deferred
(41
)
(7
)

(1
)


AOCI
4




3

(3
)
(a)
Amounts for Southern Company exclude regulatory assets of $57 million associated with unamortized amounts in Southern Company Gas' other postretirement benefit plans prior to its acquisition by Southern Company on July 1, 2016.
(b)
Included in other deferred credits and liabilities on Southern Power's consolidated balance sheets.

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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

Presented below are the amounts included in net regulatory assets (liabilities) at December 31, 2018 and 2017 related to the other postretirement benefit plans of Southern Company, the traditional electric operating companies, and Southern Company Gas that had not yet been recognized in net periodic other postretirement benefit cost.
 
Southern
Company
(*)
Alabama Power
Georgia
Power
Mississippi Power
Southern Company Gas
 
(in millions)
Balance at December 31, 2018
 
 
 
 
 
Regulatory assets:
 
 
 
 
 
Prior service cost
$
14

$
8

$
4

$

$
2

Net (gain) loss
8

(16
)
56

4

(43
)
Regulatory amortization (*)




37

Total regulatory assets (liabilities)
$
22

$
(8
)
$
60

$
4

$
(4
)
 
 
 
 
 
 
Balance at December 31, 2017
 
 
 
 
 
Regulatory assets:
 
 
 
 
 
Prior service cost
$
21

$
11

$
5

$

$
(7
)
Net (gain) loss
320

45

197

17

47

Regulatory amortization (*)




6

Total regulatory assets
$
341

$
56

$
202

$
17

$
46

(*)
Amounts for Southern Company exclude regulatory assets of $57 million associated with unamortized amounts in Southern Company Gas' other postretirement benefit plans prior to its acquisition by Southern Company on July 1, 2016.

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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

The changes in the balance of net regulatory assets (liabilities) related to the other postretirement benefit plans for the plan years ended December 31, 2018 and 2017 are presented in the following table:
 
Southern
Company
(*)
Alabama Power
Georgia
Power
Mississippi Power
Southern Company Gas
 
(in millions)
Net regulatory assets (liabilities):
 
 
 
 
 
Balance at December 31, 2016
$
378

$
76

$
213

$
19

$
52

Net (gain) loss
(21
)
(15
)
(2
)
(1
)
(5
)
Change in prior service costs
3





Reclassification adjustments:
 
 
 
 
 
Amortization of prior service costs
(6
)
(4
)
(1
)

3

Amortization of net gain (loss)
(13
)
(1
)
(8
)
(1
)
(4
)
Total reclassification adjustments
(19
)
(5
)
(9
)
(1
)
(1
)
Total change
(37
)
(20
)
(11
)
(2
)
(6
)
Balance at December 31, 2017
$
341

$
56

$
202

$
17

$
46

Net (gain) loss
(298
)
(60
)
(132
)
(12
)
(42
)
Change in prior service costs




(2
)
Reclassification adjustments:
 
 
 
 
 
Amortization of prior service costs
(7
)
(4
)
(1
)


Amortization of net gain (loss)
(14
)
(1
)
(9
)
(1
)

Amortization of regulatory assets




(6
)
Total reclassification adjustments
(21
)
(5
)
(10
)
(1
)
(6
)
Total change
(319
)
(65
)
(142
)
(13
)
(50
)
Balance at December 31, 2018
$
22

$
(9
)
$
60

$
4

$
(4
)
(*)
Amounts for Southern Company exclude regulatory assets of $57 million associated with unamortized amounts in Southern Company Gas' other postretirement benefit plans prior to its acquisition by Southern Company on July 1, 2016.
Presented below are the amounts included in AOCI at December 31, 2018 and 2017 related to the other postretirement benefit plans of Southern Company, Southern Power, and Southern Company Gas that had not yet been recognized in net periodic other postretirement benefit cost.
 
Southern
Company
Southern
Power
Southern Company
Gas
 
(in millions)
Balance at December 31, 2018
 
 
 
AOCI:
 
 
 
Prior service cost
$
1

$

$
1

Net (gain) loss
(5
)
1

(5
)
Total AOCI
$
(4
)
$
1

$
(4
)
 
 
 
 
Balance at December 31, 2017
 
 
 
AOCI:
 
 
 
Prior service cost
$

$

$

Net (gain) loss
4

3

(3
)
Total AOCI
$
4

$
3

$
(3
)

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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

The components of OCI related to the other postretirement benefit plans for the plan years ended December 31, 2018 and 2017 are presented in the following table:
 
Southern Company
Southern
Power
Southern Company Gas
 
(in millions)
AOCI:
 
 
 
Balance at December 31, 2016
$
7

$

$
(3
)
Net (gain) loss
(3
)

(1
)
Change from employee transfer

3

1

Total change
(3
)
3


Balance at December 31, 2017
$
4

$
3

$
(3
)
Net (gain) loss
(8
)
(2
)
(2
)
Amortization of prior service costs


1

Total change
(8
)
(2
)
(1
)
Balance at December 31, 2018
$
(4
)
$
1

$
(4
)
Components of the other postretirement benefit plans' net periodic cost for Southern Company, the traditional electric operating companies, and Southern Power were as follows:
 
Southern Company
Alabama Power
Georgia
Power
Mississippi Power
Southern Power
 
(in millions)
2018:
 
 
 
 
 
Service cost
$
24

$
6

$
6

$
1

$
1

Interest cost
75

17

28

3


Expected return on plan assets
(69
)
(26
)
(25
)
(2
)

Net amortization
21

5

10

1


Net periodic postretirement benefit cost
$
51

$
2

$
19

$
3

$
1

 
 
 
 
 
 
2017:
 
 
 
 
 
Service cost
$
24

$
6

$
7

$
1

 
Interest cost
79

17

29

3

 
Expected return on plan assets
(66
)
(25
)
(25
)
(1
)
 
Net amortization
20

5

9

1

 
Net periodic postretirement benefit cost
$
57

$
3

$
20

$
4

 
 
 
 
 
 
 
2016:
 
 
 
 
 
Service cost
$
22

$
5

$
6

$
1

 
Interest cost
76

18

30

3

 
Expected return on plan assets
(60
)
(25
)
(22
)
(1
)
 
Net amortization
21

6

10

1

 
Net periodic postretirement benefit cost
$
59

$
4

$
24

$
4

 

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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

Components of the other postretirement benefit plans' net periodic cost for Southern Company Gas were as follows:
 
Successor
 
 
Predecessor
 
Year Ended December 31, 2018
Year Ended December 31, 2017
July 1, 2016
through
December 31, 2016
 
 
January 1, 2016
through
June 30, 2016
 
(in millions)
 
 
(in millions)
Service cost
$
2

$
2

$
1

 
 
$
1

Interest cost
10

10

5

 
 
5

Expected return on plan assets
(7
)
(7
)
(3
)
 
 
(3
)
Amortization:
 
 
 
 
 
 
Regulatory assets
6


2

 
 

Prior service costs

(3
)

 
 
(1
)
Net (gain)/loss

4


 
 
2

Net periodic postretirement benefit cost
$
11

$
6

$
5

 
 
$
4

The registrants' future benefit payments, including prescription drug benefits, reflect expected future service and are estimated based on assumptions used to measure the APBO for the other postretirement benefit plans. The registrants' estimated benefit payments are reduced by drug subsidy receipts expected as a result of the Medicare Prescription Drug, Improvement, and Modernization Act of 2003 as follows:
 
Southern Company
Alabama Power
Georgia
Power
Mississippi Power
Southern Power
Southern Company Gas
 
(in millions)
Benefit payments:
 
 
 
 
 
 
2019
$
136

$
28

$
51

$
6

$

$
18

2020
136

28

50

6


18

2021
136

29

50

6


19

2022
137

29

50

6

1

19

2023
137

29

49

7

1

19

2024 to 2028
669

146

243

30

3

90

 
 
 
 
 
 
 
Subsidy receipts:
 
 
 
 
 
 
2019
$
(7
)
$
(2
)
$
(3
)
$

$

$

2020
(7
)
(2
)
(3
)



2021
(8
)
(2
)
(3
)



2022
(8
)
(2
)
(3
)
(1
)


2023
(8
)
(3
)
(4
)
(1
)


2024 to 2028
(41
)
(13
)
(18
)
(2
)


 
 
 
 
 
 
 
Total:
 
 
 
 
 
 
2019
$
129

$
26

$
48

$
6

$

$
18

2020
129

26

47

6


18

2021
128

27

47

6


19

2022
129

27

47

5

1

19

2023
129

26

45

6

1

19

2024 to 2028
628

133

225

28

3

90


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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

Benefit Plan Assets
Pension plan and other postretirement benefit plan assets are managed and invested in accordance with all applicable requirements, including ERISA and the Internal Revenue Code. The registrants' investment policies for both the pension plans and the other postretirement benefit plans cover a diversified mix of assets as described below. Derivative instruments may be used to gain efficient exposure to the various asset classes and as hedging tools. Additionally, the registrants minimize the risk of large losses primarily through diversification but also monitor and manage other aspects of risk.
The investment strategy for plan assets related to the Southern Company system's qualified pension plan is to be broadly diversified across major asset classes. The asset allocation is established after consideration of various factors that affect the assets and liabilities of the pension plan including, but not limited to, historical and expected returns and interest rates, volatility, correlations of asset classes, the current level of assets and liabilities, and the assumed growth in assets and liabilities. Because a significant portion of the liability of the pension plans is long-term in nature, the assets are invested consistent with long-term investment expectations for return and risk. To manage the actual asset class exposures relative to the target asset allocation, the Southern Company system employs a formal rebalancing program. As additional risk management, external investment managers and service providers are subject to written guidelines to ensure appropriate and prudent investment practices. Management believes the portfolio is well-diversified with no significant concentrations of risk.
Investment Strategies and Benefit Plan Asset Fair Values
A description of the major asset classes that the pension and other postretirement benefit plans are comprised of, along with the valuation methods used for fair value measurement, is provided below:
Description
Valuation Methodology
Domestic equity:  A mix of large and small capitalization stocks with generally an equal distribution of value and growth attributes, managed both actively and through passive index approaches.

International equity:  A mix of growth stocks and value stocks with both developed and emerging market exposure, managed both actively and through passive index approaches.
Domestic and international equities such as common stocks, American depositary receipts, and real estate investment trusts that trade on public exchanges are classified as Level 1 investments and are valued at the closing price in the active market. Equity funds with unpublished prices are valued as Level 2 when the underlying holdings are comprised of Level 1 or Level 2 equity securities.
Fixed income: A mix of domestic and international bonds.
Investments in fixed income securities are generally classified as Level 2 investments and are valued based on prices reported in the market place. Additionally, the value of fixed income securities takes into consideration certain items such as broker quotes, spreads, yield curves, interest rates, and discount rates that apply to the term of a specific instrument.
Trust-owned life insurance (TOLI):  Investments of taxable trusts aimed at minimizing the impact of taxes on the portfolio.
Investments in TOLI policies are classified as Level 2 investments and are valued based on the underlying investments held in the policy's separate accounts. The underlying assets are equity and fixed income pooled funds that are comprised of Level 1 and Level 2 securities.
Special situations:  Investments in opportunistic strategies with the objective of diversifying and enhancing returns and exploiting short-term inefficiencies, as well as investments in promising new strategies of a longer-term nature.

Real estate:  Investments in traditional private market, equity-oriented investments in real properties (indirectly through pooled funds or partnerships) and in publicly traded real estate securities.

Private equity:  Investments in private partnerships that invest in private or public securities typically through privately-negotiated and/or structured transactions, including leveraged buyouts, venture capital, and distressed debt.
Investments in real estate, private equity, and special situations are generally classified as Net Asset Value as a Practical Expedient, since the underlying assets typically do not have publicly available observable inputs. The fund manager values the assets using various inputs and techniques depending on the nature of the underlying investments. Techniques may include purchase multiples for comparable transactions, comparable public company trading multiples, discounted cash flow analysis, prevailing market capitalization rates, recent sales of comparable investments, and independent third-party appraisals. The fair value of partnerships is determined by aggregating the value of the underlying assets less liabilities.

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     Table of Contents                                  Index to Financial Statements

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

The fair values, and actual allocations relative to the target allocations, of the Southern Company system's pension plans at December 31, 2018 and 2017 are presented below. The fair values presented are prepared in accordance with GAAP. For purposes of determining the fair value of the pension plan and other postretirement benefit plan assets and the appropriate level designation, management relies on information provided by the plan's trustee. This information is reviewed and evaluated by management with changes made to the trustee information as appropriate. The registrants did not have any investments classified as Level 3 at December 31, 2018 or 2017 .
These fair values exclude cash, receivables related to investment income and pending investment sales, and payables related to pending investment purchases.
 
Fair Value Measurements Using
 
 
 
 
Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Net Asset Value as a Practical Expedient
 
Target Allocation
Actual Allocation
At December 31, 2018:
(Level 1)
(Level 2)
(NAV)
Total
 
(in millions)
 
 
Southern Company
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
Domestic equity (*)
$
2,102

$
1,030

$

$
3,132

26
%
28
%
International equity (*)
1,344

1,325


2,669

25

25

Fixed income:
 
 
 
 
23

24

U.S. Treasury, government, and agency bonds

930


930



Mortgage- and asset-backed securities

7


7



Corporate bonds

1,195


1,195



Pooled funds

654


654



Cash equivalents and other
270

2


272



Real estate investments
419


1,361

1,780

14

15

Special situations


171

171

3

1

Private equity


821

821

9

7

Total
$
4,135

$
5,143

$
2,353

$
11,631

100
%
100
%
 
 
 
 
 
 
 
Alabama Power
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
Domestic equity (*)
$
466

$
228

$

$
694

26
%
28
%
International equity (*)
298

293


591

25

25

Fixed income:
 
 
 
 
23

24

U.S. Treasury, government, and agency bonds

206


206

 
 
Mortgage- and asset-backed securities

2


2

 
 
Corporate bonds

265


265

 
 
Pooled funds

145


145

 
 
Cash equivalents and other
60

1


61

 
 
Real estate investments
93


302

395

14

15

Special situations


38

38

3

1

Private equity


182

182

9

7

Total
$
917

$
1,140

$
522

$
2,579

100
%
100
%
 
 
 
 
 
 
 

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     Table of Contents                                  Index to Financial Statements

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

 
Fair Value Measurements Using
 
 
 
 
Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Net Asset Value as a Practical Expedient
 
Target Allocation
Actual Allocation
At December 31, 2018:
(Level 1)
(Level 2)
(NAV)
Total
 
(in millions)
 
 
Georgia Power
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
Domestic equity (*)
$
663

$
325

$

$
988

26
%
28
%
International equity (*)
424

418


842

25

25

Fixed income:
 
 
 
 
23

24

U.S. Treasury, government, and agency bonds

294


294

 
 
Mortgage- and asset-backed securities

2


2

 
 
Corporate bonds

377


377

 
 
Pooled funds

206


206

 
 
Cash equivalents and other
85

1


86

 
 
Real estate investments
132


429

561

14

15

Special situations


54

54

3

1

Private equity


259

259

9

7

Total
$
1,304

$
1,623

$
742

$
3,669

100
%
100
%
 
 
 
 
 
 
 
Mississippi Power
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
Domestic equity (*)
$
91

$
45

$

$
136

26
%
28
%
International equity (*)
59

59


118

25

25

Fixed income:
 
 
 
 
23

24

U.S. Treasury, government, and agency bonds

40


40

 
 
Corporate bonds

52


52

 
 
Pooled funds

28


28

 
 
Cash equivalents and other
12



12

 
 
Real estate investments
18


59

77

14

15

Special situations


7

7

3

1

Private equity


36

36

9

7

Total
$
180

$
224

$
102

$
506

100
%
100
%
 
 
 
 
 
 
 

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     Table of Contents                                  Index to Financial Statements

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

 
Fair Value Measurements Using
 
 
 
 
Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Net Asset Value as a Practical Expedient
 
Target Allocation
Actual Allocation
At December 31, 2018:
(Level 1)
(Level 2)
(NAV)
Total
 
(in millions)
 
 
Southern Power
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
Domestic equity (*)
$
22

$
11

$

$
33

26
%
28
%
International equity (*)
14

14


28

25

25

Fixed income:
 
 
 
 
23

24

U.S. Treasury, government, and agency bonds

10


10

 
 
Corporate bonds

13


13

 
 
Pooled funds

7


7

 
 
Cash equivalents and other
3



3

 
 
Real estate investments
4


15

19

14

15

Special situations


2

2

3

1

Private equity


9

9

9

7

Total
$
43

$
55

$
26

$
124

100
%
100
%
 
 
 
 
 
 
 
Southern Company Gas
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
Domestic equity (*)
$
145

$
71

$

$
216

26
%
28
%
International equity (*)
92

91


183

25

25

Fixed income:
 
 
 
 
23

24

U.S. Treasury, government, and agency bonds

64


64




Corporate bonds

82


82




Pooled funds

45


45




Cash equivalents and other
19



19




Real estate investments
29


94

123

14

15

Special situations


12

12

3

1

Private equity


56

56

9

7

Total
$
285

$
353

$
162

$
800

100
%
100
%
(*)
Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds.

II-383

     Table of Contents                                  Index to Financial Statements

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

 
Fair Value Measurements Using
 
 
 
 
Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Net Asset Value as a Practical Expedient
 
Target Allocation
Actual Allocation
At December 31, 2017:
(Level 1)
(Level 2)
(NAV)
Total
 
(in millions)
 
 
Southern Company (a)
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
Domestic equity (b)
$
2,559

$
1,482

$

$
4,041

26
%
31
%
International equity (b)
1,555

1,569


3,124

25

25

Fixed income:
 
 
 
 
23

24

U.S. Treasury, government, and agency bonds

926


926



Mortgage- and asset-backed securities

8


8



Corporate bonds

1,241


1,241



Pooled funds

650


650



Cash equivalents and other
301

36

48

385



Real estate investments
472


1,204

1,676

14

13

Special situations


180

180

3

1

Private equity


670

670

9

6

Total
$
4,887

$
5,912

$
2,102

$
12,901

100
%
100
%
 
 
 
 
 
 
 
Alabama Power
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
Domestic equity (b)
$
572

$
276

$

$
848

26
%
31
%
International equity (b)
370

333


703

25

25

Fixed income:
 
 
 
 
23

24

U.S. Treasury, government, and agency bonds

200


200

 
 
Mortgage- and asset-backed securities

2


2

 
 
Corporate bonds

286


286

 
 
Pooled funds

155


155

 
 
Cash equivalents and other
51

3


54

 
 
Real estate investments
111


283

394

14

13

Special situations


43

43

3

1

Private equity


159

159

9

6

Total
$
1,104

$
1,255

$
485

$
2,844

100
%
100
%
 
 
 
 
 
 
 

II-384

     Table of Contents                                  Index to Financial Statements

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

 
Fair Value Measurements Using
 
 
 
 
Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Net Asset Value as a Practical Expedient
 
Target Allocation
Actual Allocation
At December 31, 2017:
(Level 1)
(Level 2)
(NAV)
Total
 
(in millions)
 
 
Georgia Power
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
Domestic equity (b)
$
819

$
394

$

$
1,213

26
%
31
%
International equity (b)
529

477


1,006

25

25

Fixed income:
 
 
 
 
23

24

U.S. Treasury, government, and agency bonds

286


286


 
Mortgage- and asset-backed securities

3


3


 
Corporate bonds

409


409


 
Pooled funds

221


221


 
Cash equivalents and other
74

4


78


 
Real estate investments
160


404

564

14

13

Special situations


61

61

3

1

Private equity


228

228

9

6

Total
$
1,582

$
1,794

$
693

$
4,069

100
%
100
%
 
 
 
 
 
 
 
Mississippi Power
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
Domestic equity (b)
$
113

$
55

$

$
168

26
%
31
%
International equity (b)
73

66


139

25

25

Fixed income:
 
 
 
 
23

24

U.S. Treasury, government, and agency bonds

40


40

 
 
Corporate bonds

56


56

 
 
Pooled funds

31


31

 
 
Cash equivalents and other
10

1


11

 
 
Real estate investments
22


56

78

14

13

Special situations


9

9

3

1

Private equity


32

32

9

6

Total
$
218

$
249

$
97

$
564

100
%
100
%
 
 
 
 
 
 
 

II-385

     Table of Contents                                  Index to Financial Statements

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

 
Fair Value Measurements Using
 
 
 
 
Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Net Asset Value as a Practical Expedient
 
Target Allocation
Actual Allocation
At December 31, 2017:
(Level 1)
(Level 2)
(NAV)
Total
 
(in millions)
 
 
Southern Power
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
Domestic equity (b)
$
28

$
13

$

$
41

26
%
31
%
International equity (b)
18

16


34

25

25

Fixed income:
 
 
 
 
23

24

U.S. Treasury, government, and agency bonds

10


10

 
 
Corporate bonds

14


14

 
 
Pooled funds

8


8

 
 
Cash equivalents and other
2



2

 
 
Real estate investments
5


14

19

14

13

Special situations


2

2

3

1

Private equity


8

8

9

6

Total
$
53

$
61

$
24

$
138

100
%
100
%
(a)
Target and actual allocations reflect the asset allocations for only the Southern Company system pension plan prior to its merger with the Southern Company Gas pension plan on January 1, 2018.
(b)
Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds.

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     Table of Contents                                  Index to Financial Statements

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

The fair values of Southern Company Gas' pension plan assets for the period ended December 31, 2017 are presented below. The fair value measurements exclude cash, receivables related to investment income, pending investment sales, and payables related to pending investment purchases. Special situations (absolute return and hedge funds) investment assets are presented in the tables below based on the nature of the investment.
 
Fair Value Measurements Using
 
 
Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Net Asset Value as a Practical Expedient
 
At December 31, 2017:
(Level 1)
(Level 2)
(NAV)
Total
 
(in millions)
Southern Company Gas
 
 
 
 
Assets:
 
 
 
 
Domestic equity (*)
$
155

$
323

$

$
478

International equity (*)

166


166

Fixed income:




U.S. Treasury, government, and agency bonds

85


85

Corporate bonds

39


39

Cash equivalents and other
84

25

48

157

Real estate investments
3


16

19

Private equity


1

1

Total
$
242

$
638

$
65

$
945

(*)
Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds.
The composition of Southern Company Gas' pension plan assets at December 31, 2017 , along with the targets, is presented below:
 
 
Target
 
2017
Pension plan assets:
 
 
 
 
Equity
 
53
%
 
65
%
Fixed Income
 
15

 
19

Cash
 
2

 
6

Other
 
30

 
10

Balance at end of period
 
100
%
 
100
%

II-387

     Table of Contents                                  Index to Financial Statements

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

The fair values of the applicable registrants' other postretirement benefit plan assets at December 31, 2018 and 2017 are presented below. The registrants did not have any investments classified as Level 3 at December 31, 2018 or 2017 . These fair value measurements exclude cash, receivables related to investment income, pending investment sales, and payables related to pending investment purchases.
 
Fair Value Measurements Using
 
 
 
 
Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Net Asset Value as a Practical Expedient
Total
Target Allocation
Actual Allocation
At December 31, 2018:
(Level 1)
(Level 2)
(NAV)
 
(in millions)
 
 
Southern Company
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
Domestic equity (*)
$
100

$
76

$

$
176

39
%
40
%
International equity (*)
45

75


120

23

22

Fixed income:
 
 
 
 
29

30

U.S. Treasury, government, and agency bonds

34


34



Corporate bonds

35


35



Pooled funds

81


81



Cash equivalents and other
13



13



Trust-owned life insurance

386


386



Real estate investments
13


40

53

5

5

Special situations


4

4

1


Private equity


24

24

3

3

Total
$
171

$
687

$
68

$
926

100
%
100
%
 
 
 
 
 
 
 
Alabama Power
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
Domestic equity (*)
$
35

$
10

$

$
45

43
%
45
%
International equity (*)
12

12


24

21

21

Fixed income:
 
 
 
 
28

28

U.S. Treasury, government, and agency bonds

10


10

 
 
Corporate bonds

11


11

 
 
Pooled funds

6


6

 
 
Cash equivalents and other
3



3

 
 
Trust-owned life insurance

233


233

 
 
Real estate investments
4


13

17

4

4

Special situations


2

2

1


Private equity


8

8

3

2

Total
$
54

$
282

$
23

$
359

100
%
100
%
 
 
 
 
 
 
 

II-388

     Table of Contents                                  Index to Financial Statements

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

 
Fair Value Measurements Using
 
 
 
 
Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Net Asset Value as a Practical Expedient
Total
Target Allocation
Actual Allocation
At December 31, 2018:
(Level 1)
(Level 2)
(NAV)
 
(in millions)
 
 
Georgia Power
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
Domestic equity (*)
$
41

$
9

$

$
50

36
%
35
%
International equity (*)
17

32


49

24

24

Fixed income:
 
 
 
 
33

35

U.S. Treasury, government, and agency bonds

7


7

 
 
Corporate bonds

10


10

 
 
Pooled funds

44


44

 
 
Cash equivalents and other
5



5

 
 
Trust-owned life insurance

153


153

 
 
Real estate investments
4


11

15

4

4

Special situations


2

2

1


Private equity


7

7

2

2

Total
$
67

$
255

$
20

$
342

100
%
100
%
 
 
 
 
 
 
 
Mississippi Power
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
Domestic equity (*)
$
3

$
2

$

$
5

21
%
22
%
International equity (*)
2

2


4

20

20

Fixed income:
 
 
 
 
38

39

U.S. Treasury, government, and agency bonds

6


6

 
 
Corporate bonds

2


2

 
 
Pooled funds

1


1

 
 
Cash equivalents and other
1



1

 
 
Real estate investments
1


2

3

11

12

Special situations




3

1

Private equity


1

1

7

6

Total
$
7

$
13

$
3

$
23

100
%
100
%
 
 
 
 
 
 
 

II-389

     Table of Contents                                  Index to Financial Statements

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

 
Fair Value Measurements Using
 
 
 
 
Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Net Asset Value as a Practical Expedient
Total
Target Allocation
Actual Allocation
At December 31, 2018:
(Level 1)
(Level 2)
(NAV)
 
(in millions)
 
 
Southern Company Gas
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
Domestic equity (*)
$
2

$
47

$

$
49

51
%
51
%
International equity (*)
1

17


18

20

18

Fixed income:
 
 
 
 
25

28

U.S. Treasury, government, and agency bonds

1


1





Corporate bonds

1


1





Pooled funds

24


24





Cash equivalents and other
1



1





Real estate investments


1

1

2

2

Special situations




1


Private equity


1

1

1

1

Total
$
4

$
90

$
2

$
96

100
%
100
%
(*)
Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds.

II-390

     Table of Contents                                  Index to Financial Statements

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

 
Fair Value Measurements Using
 
 
 
 
Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Net Asset Value as a Practical Expedient
 
Target Allocation
Actual Allocation
At December 31, 2017:
(Level 1)
(Level 2)
(NAV)
Total
 
(in millions)
 
 
Southern Company (a)
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
Domestic equity (b)
$
135

$
104

$

$
239

37
%
40
%
International equity (b)
47

98


145

23

23

Fixed income:
 
 
 
 
30

29

U.S. Treasury, government, and agency bonds

32


32



Corporate bonds

37


37



Pooled funds

79


79



Cash equivalents and other
12


1

13



Trust-owned life insurance

426


426



Real estate investments
16


36

52

5

5

Special situations


5

5

1

1

Private equity


20

20

4

2

Total
$
210

$
776

$
62

$
1,048

100
%
100
%
 
 
 
 
 
 
 
Alabama Power
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
Domestic equity (b)
$
52

$
12

$

$
64

42
%
44
%
International equity (b)
16

14


30

22

22

Fixed income:
 
 
 
 
28

28

U.S. Treasury, government, and agency bonds

11


11

 
 
Corporate bonds

12


12

 
 
Pooled funds

7


7

 
 
Cash equivalents and other
2



2

 
 
Trust-owned life insurance

253


253

 
 
Real estate investments
5


12

17

4

4

Special situations


2

2

1


Private equity


7

7

3

2

Total
$
75

$
309

$
21

$
405

100
%
100
%
 
 
 
 
 
 
 

II-391

     Table of Contents                                  Index to Financial Statements

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

 
Fair Value Measurements Using
 
 
 
 
Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Net Asset Value as a Practical Expedient
 
Target Allocation
Actual Allocation
At December 31, 2017:
(Level 1)
(Level 2)
(NAV)
Total
 
(in millions)
 
 
Georgia Power
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
Domestic equity (b)
$
53

$
11

$

$
64

36
%
38
%
International equity (b)
14

46


60

24

24

Fixed income:
 
 
 
 
33

31

U.S. Treasury, government, and agency bonds

6


6

 
 
Corporate bonds

11


11

 
 
Pooled funds

41


41

 
 
Cash equivalents and other
4



4

 
 
Trust-owned life insurance

173


173

 
 
Real estate investments
6


11

17

4

4

Special situations


2

2

1

1

Private equity


6

6

2

2

Total
$
77

$
288

$
19

$
384

100
%
100
%
 
 
 
 
 
 
 
Mississippi Power
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
Domestic equity (b)
$
4

$
2

$

$
6

21
%
25
%
International equity (b)
3

2


5

21

20

Fixed income:
 
 
 
 
37

38

U.S. Treasury, government, and agency bonds

5


5

 
 
Corporate bonds

2


2

 
 
Pooled funds

1


1

 
 
Cash equivalents and other
1



1

 
 
Real estate investments
1


2

3

12

11

Special situations




2

1

Private equity


1

1

7

5

Total
$
9

$
12

$
3

$
24

100
%
100
%
(a)
Target and actual allocations reflect the asset allocations for only the Southern Company other postretirement benefit plans prior to the merger of the plans with the Southern Company Gas other postretirement benefit plans on January 1, 2018.
(b)
Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds.

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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

The fair values of Southern Company Gas' other postretirement benefit plan assets for the period ended December 31, 2017 are presented below. These fair value measurements exclude cash, receivables related to investment income, pending investment sales, and payables related to pending investment purchases. Special situations (absolute return and hedge funds) investment assets are presented in the tables below based on the nature of the investment.
 
Fair Value Measurements Using
 
 
Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Net Asset Value as a Practical Expedient
Total
At December 31, 2017:
(Level 1)
(Level 2)
(NAV)
 
(in millions)
Southern Company Gas
 
 
 
 
Assets:
 
 
 
 
Domestic equity (*)
$
3

$
69

$

$
72

International equity (*)

22


22

Fixed income:
 
 
 
 
Pooled funds

24


24

Cash equivalents and other
2


1

3

Total
$
5

$
115

$
1

$
121

(*)
Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds.
The composition of Southern Company Gas' other postretirement benefit plan assets at December 31, 2017, along with the targets, is presented below:
 
 
Target
 
2017
Other postretirement benefit plan assets:
 
 
 
 
Equity
 
72
%
 
76
%
Fixed Income
 
24

 
20

Cash
 
1

 
2

Other
 
3

 
2

Total
 
100
%
 
100
%
Employee Savings Plan
Southern Company and its subsidiaries also sponsor 401(k) defined contribution plans covering substantially all employees and provide matching contributions up to specified percentages of an employee's eligible pay. Total matching contributions made to the plans for 2018 , 2017 , and 2016 were as follows:
 
Southern Company
Alabama
Power
Georgia
Power
Mississippi
Power
Southern
Power
 
(in millions)
2018
$
119

$
24

$
26

$
5

$
3

2017
118

23

26

5

N/A

2016
105

23

27

5

N/A


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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

 
Southern Company Gas
 
(in millions)
Successor – 2018
$
18

Successor – 2017
19

Successor – July 1, 2016 through December 31, 2016
8

Predecessor – January 1, 2016 through June 30, 2016
12

12 . STOCK COMPENSATION
Stock-Based Compensation
Stock-based compensation primarily in the form of Southern Company performance share units (PSU) and restricted stock units (RSU) may be granted through the Omnibus Incentive Compensation Plan to a large segment of Southern Company system employees ranging from line management to executives. Southern Company Gas and Southern Power had no employee participants in the stock-based compensation plans until 2017 and 2018, respectively. In conjunction with the Merger, stock-based compensation in the form of Southern Company RSUs and PSUs was granted to certain executives of Southern Company Gas through the Southern Company Omnibus Incentive Compensation Plan.
At December 31, 2018 , the number of current and former employees participating in stock-based compensation programs for the registrants was as follows:
 
Southern Company
Alabama Power
Georgia Power
Mississippi Power
Southern Power
Southern Company Gas
Number of employees
4,716

745

822

164

95

285

Employees become immediately vested in PSUs and RSUs upon retirement. As a result, compensation expense for employees that are retirement eligible at the grant date is recognized immediately, while compensation expense for employees that become retirement eligible during the vesting period is recognized over the period from grant date to the date of retirement eligibility. In addition, the registrants recognize forfeitures as they occur.
All unvested PSUs and RSUs vest immediately upon a change in control where Southern Company is not the surviving corporation.
Performance Share Units
PSUs granted to employees vest at the end of a three -year performance period. Shares of Southern Company common stock are delivered to employees at the end of the performance period with the number of shares issued ranging from 0% to 200% of the target number of PSUs granted, based on achievement of the performance goals established by the Compensation Committee of the Southern Company Board of Directors.
Southern Company has issued three types of PSUs, each with a unique performance goal. These types of PSUs include total shareholder return (TSR) awards based on the TSR for Southern Company common stock during the three -year performance period as compared to a group of industry peers; ROE awards based on Southern Company's equity-weighted return over the performance period; and EPS awards based on Southern Company's cumulative EPS over the performance period. EPS awards were not granted in 2018.

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Southern Company and Subsidiary Companies 2018 Annual Report

The fair value of TSR awards is determined as of the grant date using a Monte Carlo simulation model to estimate the TSR of Southern Company's common stock among industry peers over the performance period. In determining the fair value of the TSR awards issued to employees, the expected volatility is based on the historical volatility of Southern Company's stock over a period equal to the performance period. The risk-free rate is based on the U.S. Treasury yield curve in effect at the time of grant that covers the performance period of the awards. The following table shows the assumptions used in the pricing model and the weighted average grant-date fair value of TSR awards granted:
Year Ended December 31
2018
 
2017
 
2016
Expected volatility
14.9%
 
15.6%
 
15.0%
Expected term (in years)
3
 
3
 
3
Interest rate
2.4%
 
1.4%
 
0.8%
Weighted average grant-date fair value
$43.75
 
$49.08
 
$45.06
The registrants recognize TSR award compensation expense on a straight-line basis over the three -year performance period without remeasurement.
The fair values of EPS awards and ROE awards are based on the closing stock price of Southern Company common stock on the date of the grant. The weighted average grant-date fair value of the awards granted during 2018 , 2017 , and 2016 was $43.49 , $49.21 , and $48.87 , respectively. Compensation expense for EPS and ROE awards is generally recognized ratably over the three -year performance period adjusted for expected changes in EPS and ROE performance. Total compensation cost recognized for vested EPS awards and ROE awards reflects final performance metrics.
Southern Company's total unvested PSUs outstanding at December 31, 2017 was 2.9 million . In February 2018 , 1.5 million PSUs vested for the three -year performance period ended December 31, 2017 were converted into 1.9 million shares outstanding at a share price of $44.68 .
During 2018 , Southern Company granted 1.3 million PSUs and 1.9 million PSUs were vested or forfeited, resulting in 2.5 million unvested PSUs outstanding at December 31, 2018 . In February 2019, the PSUs that vested for the three -year performance period ended December 31, 2018 were converted into 1.7 million shares outstanding at a share price of $49.24 .

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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

Total PSU compensation cost, and the related tax benefit recognized in income, for the years ended December 31, 2018 , 2017 , and 2016 are as follows:
 
2018
 
2017
 
2016
 
(in millions)
Southern Company
 
 
 
 
 
Compensation cost recognized in income
$
91

 
$
74

 
$
96

Tax benefit of compensation cost recognized in income
24

 
29

 
37

Alabama Power
 
 
 
 
 
Compensation cost recognized in income
$
11

 
$
9

 
$
15

Tax benefit of compensation cost recognized in income
3

 
4

 
6

Georgia Power
 
 
 
 
 
Compensation cost recognized in income
$
11

 
$
10

 
$
15

Tax benefit of compensation cost recognized in income
3

 
4

 
6

Mississippi Power
 
 
 
 
 
Compensation cost recognized in income
$
3

 
$
2

 
$
4

Tax benefit of compensation cost recognized in income
1

 
1

 
1

Southern Power
 
 
 
 
 
Compensation cost recognized in income
$
4

 
N/A

 
N/A

Tax benefit of compensation cost recognized in income
1

 
N/A

 
N/A

Southern Company Gas
 
 
 
 
 
Compensation cost recognized in income
$
11

 
$
8

 
N/A

Tax benefit of compensation cost recognized in income
3

 
3

 
N/A

The compensation cost related to the grant of Southern Company PSUs to the employees of the traditional electric operating companies, Southern Power, and Southern Company Gas is recognized in each respective registrant's financial statements with a corresponding credit to equity representing a capital contribution from Southern Company.
At December 31, 2018 , Southern Company's total unrecognized compensation cost related to PSUs was $30 million and is expected to be recognized over a weighted-average period of approximately 16 months . The total unrecognized compensation cost related to PSUs as of December 31, 2018 was immaterial for all other registrants.
Restricted Stock Units
Beginning in 2017 , employees are granted RSUs in addition to PSUs. One-third of the RSUs granted to employees vest each year throughout a three -year service period. Shares of Southern Company common stock are delivered to employees at the end of each vesting period.
The fair value of RSUs is based on the closing stock price of Southern Company common stock on the date of the grant. The weighted average grant-date fair values of RSUs granted during 2018 and 2017 were $43.81 and $49.25 , respectively. Since one-third of the RSUs vest each year throughout a three -year service period, compensation cost for RSUs is generally recognized over the corresponding one -, two -, or three -year vesting period.
Southern Company had 0.7 million RSUs outstanding at December 31, 2017 . During 2018 , Southern Company granted 0.7 million RSUs and 0.3 million RSUs were vested or forfeited, resulting in 1.1 million unvested RSUs outstanding at December 31, 2018 , including RSUs related to employee retention agreements.
For the years ended December 31, 2018 and 2017 , Southern Company's total compensation cost for RSUs recognized in income was $27 million and $25 million , respectively. The related tax benefit also recognized in income was $7 million and $10 million for the years ended December 31, 2018 and 2017 , respectively. Total unrecognized compensation cost related to RSUs as of December 31, 2018 for Southern Company of $13 million will be recognized over a weighted-average period of approximately 16 months .

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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

Total RSUs outstanding and total compensation cost and related tax benefit for the RSUs recognized in income for the years ended December 31, 2018 and 2017 , as well as the total unrecognized compensation cost as of December 31, 2018 , were immaterial for all other registrants.
Stock Options
In 2015, Southern Company discontinued granting stock options. Stock options expire no later than 10 years after the grant date and the latest possible exercise will occur no later than November 2024. As of December 31, 2018 , the weighted average remaining contractual term for the options outstanding and exercisable was approximately 4 years .
As of December 31, 2017 , all stock option awards are vested and compensation cost fully recognized. Total compensation cost for stock option awards and the related tax benefits recognized in income for the years ended December 31, 2017 and 2016 were immaterial for Southern Company, Alabama Power, Georgia Power, and Mississippi Power.
Southern Company's activity in the stock option program for 2018 is summarized below:
 
Shares Subject to Option
 
Weighted Average Exercise Price
 
(in millions)
 
 
Outstanding at December 31, 2017
18.6

 
$
41.68

Exercised
1.1

 
37.82

Outstanding and Exercisable at December 31, 2018
17.5

 
$
41.92

Southern Company's cash receipts from issuances related to stock options exercised under the share-based payment arrangements for the years ended December 31, 2018 , 2017 , and 2016 were $41 million , $239 million , and $448 million , respectively.
At December 31, 2018 , the aggregate intrinsic value for the options outstanding and exercisable was as follows:
 
Southern Company
Alabama Power
Georgia Power
Mississippi Power
 
(in millions)
Total intrinsic value for outstanding and exercisable options
$
39

$
5

$
13

$
1

Total intrinsic value of options exercised, and the related tax benefit, for the years ended December 31, 2018 , 2017 , and 2016 are presented below:
Year Ended December 31
2018
 
2017
 
2016
 
(in millions)
Southern Company
 
 
 
 
 
Intrinsic value of options exercised
$
9

 
$
64

 
$
120

Tax benefit of options exercised
2

 
25

 
46

Alabama Power
 
 
 
 
 
Intrinsic value of options exercised
$
2

 
$
12

 
$
21

Tax benefit of options exercised

 
5

 
8

Georgia Power
 
 
 
 
 
Intrinsic value of options exercised
$
2

 
$
13

 
$
18

Tax benefit of options exercised

 
5

 
7

Mississippi Power
 
 
 
 
 
Intrinsic value of options exercised
$
1

 
$
2

 
$
4

Tax benefit of options exercised

 
1

 
2


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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

Merger Stock Compensation
At the effective time of the Merger, each share of Southern Company Gas common stock, other than certain excluded shares, was converted into the right to receive $66 in cash, without interest. Also, at the effective time of the Merger:
Southern Company Gas' outstanding RSUs, restricted stock awards, and non-employee director stock awards were deemed fully vested and were canceled and converted into the right to receive an amount in cash equal to the product of (i) the total number of shares of Southern Company Gas' common stock subject to such award and (ii) the Merger consideration of $66 per share;
Southern Company Gas' outstanding stock options, all of which were fully vested, were canceled and converted into the right to receive an amount in cash equal to the product of (i) the total number of shares of Southern Company Gas' common stock subject to such options and (ii) the excess of the Merger consideration of $66 per share over the applicable exercise price per share of such options; and
each outstanding award of a Southern Company Gas PSU was converted into an award of Southern Company RSUs. The conversion ratio was the product of (i) the greater of (a) 125% of the number of units underlying such award based on target level achievement of all relevant performance goals and (b) the number of units underlying such award based on the actual level of achievement of all relevant performance goals against target and (ii) an exchange ratio based on the Merger consideration of $66 per share as compared to the volume-weighted average price per share of Southern Company common stock.
Southern Company Restricted Stock Awards
At the effective time of the Merger, each outstanding award of existing Southern Company Gas PSUs was converted into an award of Southern Company RSUs. Under the terms of the restricted stock awards, the employees received Southern Company stock when they satisfy the requisite service period by being continuously employed through the original three -year vesting schedule of the award being replaced. Southern Company issued 0.7 million RSUs with a grant-date fair value of $53.83 , based on the closing stock price of Southern Company common stock on the date of the grant. As a portion of the fair value of the award related to pre-combination service, the grant date fair value was allocated to pre- or post-combination service and accounted for as Merger consideration or compensation cost, respectively. Approximately $13 million of the grant date fair value was allocated to Merger consideration. Southern Company Gas recognized the remaining fair value as compensation expense on a straight-line basis over the remaining vesting period. As of December 31, 2018, all RSUs are vested and compensation cost is fully recognized.
For the years ended December 31, 2018, 2017, and 2016, total compensation cost for RSUs recognized in income was $2 million , $8 million , and $13 million , respectively, with the related tax benefit of $1 million , $4 million , and $4 million , respectively, also recognized in income. The compensation cost related to the grant of RSUs to Southern Company Gas employees is recognized in Southern Company Gas' financial statements with a corresponding credit to equity, representing a capital contribution from Southern Company.
Southern Company Gas Change in Control Awards
Southern Company awarded PSUs to certain Southern Company Gas employees who continued their employment with the Southern Company in lieu of certain change in control benefits the employee was entitled to receive following the Merger (change in control awards). Shares of Southern Company common stock and/or cash equal to the dollar value of the change in control benefit will vest and be issued one-third each year as long as the employee remains in service with Southern Company or its subsidiaries at each vest date. In addition to the change in control benefit, Southern Company common stock could be issued to the employees at the end of a performance period based on achievement of certain Southern Company common stock price metrics, as well performance goals established by the Compensation Committee of the Southern Company Board of Directors (achievement shares).
The change in control benefits are accounted for as a liability award with the fair value equal to the guaranteed dollar value of the change in control benefit. The compensation cost of the change in control benefit is recognized in Southern Company Gas' financial statements with a corresponding credit to a liability. The grant-date fair value of the achievement portion of the award was determined using a Monte Carlo simulation model to estimate the number of achievement shares expected to vest based on the Southern Company common stock price. The compensation cost of the achievement shares is recognized in Southern Company Gas' financial statements with a corresponding credit to equity, representing a capital contribution from Southern Company. The expected payout is reevaluated annually with expense recognized to date increased or decreased proportionately based on the expected performance. The compensation cost ultimately recognized for the achievement shares will be based on the actual performance.

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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

For the years ended December 31, 2018, 2017, and 2016, total compensation cost for the change in control awards recognized in income was $5 million , $12 million , and $4 million , respectively, with the related tax benefit of $2 million , $6 million , and less than $1 million , respectively, also recognized in income. As of December 31, 2018, $2 million of total unrecognized compensation cost related to change in control awards will be recognized over a weighted-average period of approximately six months .
Predecessor
For the predecessor period of January 1, 2016 through June 30, 2016, the employees of Southern Company Gas and subsidiaries participated in the AGL Resources Inc. Omnibus Performance Incentive Plan, as amended and restated.
The AGL Resources Inc. Omnibus Performance Incentive Plan, as amended and restated, and the Long-Term Incentive Plan (1999) provided for the grant of incentive and nonqualified stock options, stock appreciation rights, shares of restricted stock, RSUs, performance cash awards, and other stock-based awards to officers and key employees. Effective July 1, 2016, all Southern Company Gas shares of stock were canceled and/or converted as a result of the Merger. No further grants will be made from the Long-Term Incentive Plan (1999) or the AGL Resources Inc. Omnibus Performance Incentive Plan, as amended and restated.
For the predecessor period, Southern Company Gas recognized stock-based compensation cost for its stock-based awards over the requisite service period based on the estimated fair value at the date of grant for its stock-based awards using the modified prospective method.
Performance-based stock awards and performance units contained market and performance conditions. Stock options, restricted stock awards, and performance units also contained a service condition. Southern Company Gas estimated forfeitures over the requisite service period when recognizing compensation cost. These estimates were adjusted to the extent that actual forfeitures differ, or were expected to materially differ, from such estimates. The difference between the proceeds from the exercise of Southern Company Gas' stock-based awards and the par value of the stock was recorded within additional paid-in capital.
Southern Company Gas granted stock awards with a grant price that was equal to the fair market value on the date of the grant. Fair market value was defined under the terms of the applicable plans as the closing price per share of Southern Company Gas' common stock on the grant date. For the predecessor period of January 1, 2016 through June 30, 2016, total compensation cost for cash and stock-based awards recognized in income was $24 million with related tax benefits of an immaterial amount also recognized in income.
13 . FAIR VALUE MEASUREMENTS
Fair value measurements are based on inputs of observable and unobservable market data that a market participant would use in pricing the asset or liability. The use of observable inputs is maximized where available and the use of unobservable inputs is minimized for fair value measurement and reflects a three-tier fair value hierarchy that prioritizes inputs to valuation techniques used for fair value measurement.
Level 1 consists of observable market data in an active market for identical assets or liabilities.
Level 2 consists of observable market data, other than that included in Level 1, that is either directly or indirectly observable.
Level 3 consists of unobservable market data. The input may reflect the assumptions of each registrant of what a market participant would use in pricing an asset or liability. If there is little available market data, then each registrant's own assumptions are the best available information.
In the case of multiple inputs being used in a fair value measurement, the lowest level input that is significant to the fair value measurement represents the level in the fair value hierarchy in which the fair value measurement is reported.

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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

At December 31, 2018 , assets and liabilities measured at fair value on a recurring basis during the period, together with their associated level of the fair value hierarchy, were as follows:
 
Fair Value Measurements Using
 
 
 
Quoted Prices in Active Markets for Identical Assets 
 
Significant Other Observable Inputs
 
Significant Unobservable Inputs
 
Net Asset Value as a Practical Expedient
 
 
At December 31, 2018:
(Level 1)
 
(Level 2)
 
(Level 3)
 
(NAV)
 
Total
 
(in millions)
Southern Company
 
 
 
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
 
 
 
Energy-related derivatives (a)(b)
$
469

 
$
292

 
$

 
$

 
$
761

Foreign currency derivatives

 
75

 

 

 
75

Investments in trusts: (c)(d)
 
 
 
 
 
 
 
 
 
Domestic equity
601

 
107

 

 

 
708

Foreign equity
53

 
173

 

 

 
226

U.S. Treasury and government agency securities

 
261

 

 

 
261

Municipal bonds

 
83

 

 

 
83

Pooled funds – fixed income

 
14

 

 

 
14

Corporate bonds
24

 
290

 

 

 
314

Mortgage and asset backed securities

 
68

 

 

 
68

Private equity

 

 

 
45

 
45

Cash and cash equivalents
16

 

 

 

 
16

Other
34

 
4

 

 

 
38

Cash equivalents
765

 
1

 

 

 
766

Other investments

 
12

 

 

 
12

Total
$
1,962

 
$
1,380

 
$

 
$
45

 
$
3,387

Liabilities:
 
 
 
 
 
 
 
 
 
Energy-related derivatives (a)(b)
$
648

 
$
316

 
$

 
$

 
$
964

Interest rate derivatives

 
49

 

 

 
49

Foreign currency derivatives

 
23

 

 

 
23

Contingent consideration

 

 
21

 

 
21

Total
$
648

 
$
388

 
$
21

 
$

 
$
1,057

 
 
 
 
 
 
 
 
 
 

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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

 
Fair Value Measurements Using
 
 
 
Quoted Prices in Active Markets for Identical Assets 
 
Significant Other Observable Inputs
 
Significant Unobservable Inputs
 
Net Asset Value as a Practical Expedient
 
 
At December 31, 2018:
(Level 1)
 
(Level 2)
 
(Level 3)
 
(NAV)
 
Total
 
(in millions)
Alabama Power
 
 
 
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
 
 
 
Energy-related derivatives
$

 
$
6

 
$

 
$

 
$
6

Nuclear decommissioning trusts: (c)
 
 
 
 
 
 
 
 
 
Domestic equity
396

 
95

 

 

 
491

Foreign equity
53

 
50

 

 

 
103

U.S. Treasury and government agency securities

 
18

 

 

 
18

Municipal bonds

 
1

 

 

 
1

Corporate bonds
24

 
135

 

 

 
159

Mortgage and asset backed securities

 
23

 

 

 
23

Private equity

 

 

 
45

 
45

Other
6

 

 

 

 
6

Cash equivalents
116

 
1

 

 

 
117

Other investments

 
12

 

 

 
12

Total
$
595

 
$
341

 
$

 
$
45

 
$
981

Liabilities:
 
 
 
 
 
 
 
 
 
Energy-related derivatives
$

 
$
10

 
$

 
$

 
$
10

 
 
 
 
 
 
 
 
 
 
Georgia Power
 
 
 
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
 
 
 
Energy-related derivatives
$

 
$
6

 
$

 
$

 
$
6

Nuclear decommissioning trusts: (c)(d)
 
 
 
 
 
 
 
 
 
Domestic equity
205

 
1

 

 

 
206

Foreign equity

 
119

 

 

 
119

U.S. Treasury and government agency securities

 
243

 

 

 
243

Municipal bonds

 
82

 

 

 
82

Corporate bonds

 
155

 

 

 
155

Mortgage and asset backed securities

 
45

 

 

 
45

Other
19

 
4

 

 

 
23

Total
$
224

 
$
655

 
$

 
$

 
$
879

Liabilities:

 

 

 

 

Energy-related derivatives
$

 
$
21

 
$

 
$

 
$
21

Interest rate derivatives

 
2

 

 

 
2

Total
$

 
$
23

 
$

 
$

 
$
23

 
 
 
 
 
 
 
 
 
 

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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

 
Fair Value Measurements Using
 
 
 
Quoted Prices in Active Markets for Identical Assets 
 
Significant Other Observable Inputs
 
Significant Unobservable Inputs
 
Net Asset Value as a Practical Expedient
 
 
At December 31, 2018:
(Level 1)
 
(Level 2)
 
(Level 3)
 
(NAV)
 
Total
 
(in millions)
Mississippi Power
 
 
 
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
 
 
 
Energy-related derivatives
$

 
$
3

 
$

 
$

 
$
3

Cash equivalents
255

 

 

 

 
255

Total
$
255

 
$
3

 
$

 
$

 
$
258

Liabilities:
 
 
 
 
 
 
 
 
 
Energy-related derivatives
$

 
$
9

 
$

 
$

 
$
9

 
 
 
 
 
 
 
 
 
 
Southern Power
 
 
 
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
 
 
 
Energy-related derivatives
$

 
$
4

 
$

 
$

 
$
4

Foreign currency derivatives

 
75

 

 

 
75

Cash equivalents
46

 

 

 

 
46

Total
$
46

 
$
79

 
$

 
$

 
$
125

Liabilities:
 
 
 
 
 
 
 
 
 
Energy-related derivatives
$

 
$
8

 
$

 
$

 
$
8

Foreign currency derivatives

 
23

 

 

 
23

Contingent consideration

 

 
21

 

 
21

Total
$

 
$
31

 
$
21

 
$

 
$
52

 
 
 
 
 
 
 
 
 
 
Southern Company Gas
 
 
 
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
 
 
 
Energy-related derivatives (a)(b)
$
469

 
$
272

 
$

 
$

 
$
741

Non-qualified deferred compensation trusts:
 
 
 
 
 
 
 
 
 
Domestic equity

 
11

 

 

 
11

Foreign equity

 
4

 

 

 
4

Pooled funds - fixed income

 
14

 

 

 
14

Cash equivalents
4

 

 

 

 
4

Cash equivalents
40

 

 

 

 
40

Total
$
513

 
$
301

 
$

 
$

 
$
814

Liabilities:
 
 
 
 
 
 
 
 


Energy-related derivatives (a)(b)
$
648

 
$
261

 
$

 
$

 
$
909

(a)
Energy-related derivatives exclude $8 million associated with premiums and certain weather derivatives accounted for based on intrinsic value rather than fair value.
(b)
Energy-related derivatives exclude cash collateral of $277 million .
(c)
Excludes receivables related to investment income, pending investment sales, payables related to pending investment purchases, and currencies. See Note 6 under " Nuclear Decommissioning " for additional information.
(d)
Includes investment securities pledged to creditors and collateral received and excludes payables related to the securities lending program. See Note 6 under " Nuclear Decommissioning " for additional information.

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At December 31, 2017 , assets and liabilities measured at fair value on a recurring basis during the period, together with their associated level of the fair value hierarchy, were as follows:
 
Fair Value Measurements Using
 
 
 
Quoted Prices in Active Markets for Identical Assets
 
Significant Other Observable Inputs
 
Significant Unobservable Inputs
 
Net Asset Value as a Practical Expedient
 
 
At December 31, 2017:
(Level 1)
 
(Level 2)
 
(Level 3)
 
(NAV)
 
Total
 
(in millions)
Southern Company
 
 
 
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
 
 
 
Energy-related derivatives (a)(b)
$
331

 
$
239

 
$

 
$

 
$
570

Interest rate derivatives

 
1

 

 

 
1

Foreign currency derivatives

 
129

 

 

 
129

Nuclear decommissioning trusts: (c)
 
 
 
 
 
 
 
 
 
Domestic equity
690

 
82

 

 

 
772

Foreign equity
62

 
224

 

 

 
286

U.S. Treasury and government agency securities

 
251

 

 

 
251

Municipal bonds

 
68

 

 

 
68

Corporate bonds
21

 
315

 

 

 
336

Mortgage and asset backed securities

 
57

 

 

 
57

Private equity

 

 

 
29

 
29

Other
19

 
12

 

 

 
31

Cash equivalents
1,455

 

 

 

 
1,455

Other investments
9

 

 
1

 

 
10

Total
$
2,587

 
$
1,378

 
$
1

 
$
29

 
$
3,995

Liabilities:
 
 
 
 
 
 
 
 
 
Energy-related derivatives (a)(b)
$
480

 
$
253

 
$

 
$

 
$
733

Interest rate derivatives

 
38

 

 

 
38

Foreign currency derivatives

 
23

 

 

 
23

Contingent consideration

 

 
22

 

 
22

Total
$
480

 
$
314

 
$
22

 
$

 
$
816

 
 
 
 
 
 
 
 
 
 

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Fair Value Measurements Using
 
 
 
Quoted Prices in Active Markets for Identical Assets
 
Significant Other Observable Inputs
 
Significant Unobservable Inputs
 
Net Asset Value as a Practical Expedient
 
 
At December 31, 2017:
(Level 1)
 
(Level 2)
 
(Level 3)
 
(NAV)
 
Total
 
(in millions)
Alabama Power
 
 
 
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
 
 
 
Energy-related derivatives
$

 
$
4

 
$

 
$

 
$
4

Nuclear decommissioning trusts: (d)


 


 


 
 
 


Domestic equity
442

 
81

 

 

 
523

Foreign equity
62

 
59

 

 

 
121

U.S. Treasury and government agency securities

 
24

 

 

 
24

Corporate bonds
21

 
160

 

 

 
181

Mortgage and asset backed securities

 
18

 

 

 
18

Private equity

 

 

 
29

 
29

Other
6

 

 

 

 
6

Cash equivalents
349

 

 

 

 
349

Total
$
880

 
$
346

 
$

 
$
29

 
$
1,255

Liabilities:
 
 
 
 
 
 
 
 
 
Energy-related derivatives
$

 
$
10

 
$

 
$

 
$
10

 
 
 
 
 
 
 
 
 
 
Georgia Power
 
 
 
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
 
 
 
Energy-related derivatives
$

 
$
6

 
$

 
$

 
$
6

Nuclear decommissioning trusts: (d)(e)
 
 
 
 
 
 
 
 
 
Domestic equity
248

 
1

 

 

 
249

Foreign equity

 
166

 

 

 
166

U.S. Treasury and government agency securities

 
227

 

 

 
227

Municipal bonds

 
68

 

 

 
68

Corporate bonds

 
155

 

 

 
155

Mortgage and asset backed securities

 
40

 

 

 
40

Other
12

 
12

 

 

 
24

Cash equivalents
690

 

 

 

 
690

Total
$
950

 
$
675

 
$

 
$

 
$
1,625

Liabilities:
 
 
 
 
 
 
 
 
 
Energy-related derivatives
$

 
$
19

 
$

 
$

 
$
19

Interest rate derivatives

 
5

 

 

 
5

Total
$

 
$
24

 
$

 
$

 
$
24

 
 
 
 
 
 
 
 
 
 

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Fair Value Measurements Using
 
 
 
Quoted Prices in Active Markets for Identical Assets
 
Significant Other Observable Inputs
 
Significant Unobservable Inputs
 
Net Asset Value as a Practical Expedient
 
 
At December 31, 2017:
(Level 1)
 
(Level 2)
 
(Level 3)
 
(NAV)
 
Total
 
(in millions)
Mississippi Power
 
 
 
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
 
 
 
Energy-related derivatives
$

 
$
2

 
$

 
$

 
$
2

Interest rate derivatives

 
1

 

 

 
1

Cash equivalents
224

 

 

 

 
224

Total
$
224

 
$
3

 
$

 
$

 
$
227

Liabilities:
 
 
 
 
 
 
 
 
 
Energy-related derivatives
$

 
$
9

 
$

 
$

 
$
9

 
 
 
 
 
 
 
 
 
 
Southern Power
 
 
 
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
 
 
 
Energy-related derivatives
$

 
$
3

 
$

 
$

 
$
3

Foreign currency derivatives

 
129

 

 

 
129

Cash equivalents
21

 

 

 

 
21

Total
$
21

 
$
132

 
$

 
$

 
$
153

Liabilities:
 
 
 
 
 
 
 
 
 
Energy-related derivatives
$

 
$
13

 
$

 
$

 
$
13

Foreign currency derivatives

 
23

 

 

 
23

Contingent consideration

 

 
22

 

 
22

Total
$

 
$
36

 
$
22

 
$

 
$
58

 
 
 
 
 
 
 
 
 
 
Southern Company Gas
 
 
 
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
 
 
 
Energy-related derivatives (a)(b)
$
331

 
$
223

 
$

 
$

 
$
554

Liabilities:
 
 
 
 
 
 
 
 
 
Energy-related derivatives (a)(b)
$
479

 
$
181

 
$

 
$

 
660

(a)
Energy-related derivatives exclude $11 million associated with premiums and certain weather derivatives accounted for based on intrinsic value rather than fair value.
(b)
Energy-related derivatives exclude cash collateral of $193 million .
(c)
For additional detail, see the nuclear decommissioning trusts sections for Alabama Power and Georgia Power in this table.
(d)
Excludes receivables related to investment income, pending investment sales, payables related to pending investment purchases, and currencies. See Note 6 under " Nuclear Decommissioning " for additional information.
(e)
Includes investment securities pledged to creditors and collateral received and excludes payables related to the securities lending program. See Note 6 under " Nuclear Decommissioning " for additional information.
Valuation Methodologies
The energy-related derivatives primarily consist of exchange-traded and over-the-counter financial products for natural gas and physical power products, including, from time to time, basis swaps. These are standard products used within the energy industry and are valued using the market approach. The inputs used are mainly from observable market sources, such as forward natural gas prices, power prices, implied volatility, and overnight index swap interest rates. Interest rate derivatives are also standard over-the-counter products that are valued using observable market data and assumptions commonly used by market participants. The fair value of interest rate derivatives reflects the net present value of expected payments and receipts under the swap

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agreement based on the market's expectation of future interest rates. Additional inputs to the net present value calculation may include the contract terms, counterparty credit risk, and occasionally, implied volatility of interest rate options. The fair value of cross-currency swaps reflects the net present value of expected payments and receipts under the swap agreement based on the market's expectation of future foreign currency exchange rates. Additional inputs to the net present value calculation may include the contract terms, counterparty credit risk, and discount rates. The interest rate derivatives and cross-currency swaps are categorized as Level 2 under Fair Value Measurements as these inputs are based on observable data and valuations of similar instruments. See Note 14 for additional information on how these derivatives are used.
For fair value measurements of the investments within the nuclear decommissioning trusts and the non-qualified deferred compensation trusts, external pricing vendors are designated for each asset class with each security specifically assigned a primary pricing source. For investments held within commingled funds, fair value is determined at the end of each business day through the net asset value, which is established by obtaining the underlying securities' individual prices from the primary pricing source. A market price secured from the primary source vendor is then evaluated by management in its valuation of the assets within the trusts. As a general approach, fixed income market pricing vendors gather market data (including indices and market research reports) and integrate relative credit information, observed market movements, and sector news into proprietary pricing models, pricing systems, and mathematical tools. Dealer quotes and other market information, including live trading levels and pricing analysts' judgments, are also obtained when available.
The NRC requires licensees of commissioned nuclear power reactors to establish a plan for providing reasonable assurance of funds for future decommissioning. See Note 6 under " Nuclear Decommissioning " for additional information.
Southern Power has contingent payment obligations related to certain acquisitions whereby Southern Power is primarily obligated to make generation-based payments to the seller, which commenced at the commercial operation of the respective facility and continue through 2026. The obligation is categorized as Level 3 under Fair Value Measurements as the fair value is determined using significant unobservable inputs for the forecasted facility generation in MW-hours, as well as other inputs such as a fixed dollar amount per MW-hour, and a discount rate. The fair value of contingent consideration reflects the net present value of expected payments and any periodic change arising from forecasted generation is expected to be immaterial.
"Other investments" include investments categorized as Level 3 under Fair Value Measurements that are not traded in the open market. The fair value of these investments has been determined based on market factors including comparable multiples and the expectations regarding cash flows and business plan executions.
The fair value measurements of private equity investments held in Alabama Power's nuclear decommissioning trusts that are calculated at net asset value per share (or its equivalent) as a practical expedient totaled $45 million and $29 million at December 31, 2018 and 2017 , respectively. Unfunded commitments related to the private equity investments totaled $50 million and $21 million at December 31, 2018 and 2017 , respectively. Private equity funds include funds-of-funds that invest in high-quality private equity funds across several market sectors, funds that invest in real estate assets, and a fund that acquires companies to create resale value. Private equity funds do not have redemption rights. Distributions from these funds will be received as the underlying investments in the funds are liquidated.

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Southern Company and Subsidiary Companies 2018 Annual Report

At December 31, 2018 and 2017 , other financial instruments for which the carrying amount did not equal fair value were as follows:
 
Southern
  Company (a)(b)
Alabama Power
Georgia Power
Mississippi Power
Southern Power
Southern Company Gas (b)
 
(in millions)
At December 31, 2018:
 
 
 
 
 
 
Long-term debt, including securities due within one year:
 
 
 
 
 
 
Carrying amount
$
45,023

$
8,120

$
9,838

$
1,579

$
5,017

$
5,940

Fair value
44,824

8,370

9,800

1,546

4,980

5,965

At December 31, 2017:
 
 
 
 
 
 
Long-term debt, including securities due within one year:
 
 
 
 
 
 
Carrying amount
$
48,151

$
7,625

$
11,777

$
2,086

$
5,841

$
6,048

Fair value
51,348

8,305

12,531

2,076

6,079

6,471

(a)
Includes long-term debt of Gulf Power, which is classified as liabilities held for sale on Southern Company's balance sheet at December 31, 2018. See Note 15 under " Southern Company's Sale of Gulf Power " and " Assets Held for Sale " for additional information.
(b)
The long-term debt of Southern Company Gas is recorded at amortized cost, including the fair value adjustments at the effective date of the Merger. Southern Company Gas amortizes the fair value adjustments over the lives of the respective bonds.
The fair values are determined using Level 2 measurements and are based on quoted market prices for the same or similar issues or on the current rates available to the registrants.
14 . DERIVATIVES
Southern Company, the traditional electric operating companies, Southern Power, and Southern Company Gas are exposed to market risks, including commodity price risk, interest rate risk, weather risk, and occasionally foreign currency exchange rate risk. To manage the volatility attributable to these exposures, each company nets its exposures, where possible, to take advantage of natural offsets and enters into various derivative transactions for the remaining exposures pursuant to each company's policies in areas such as counterparty exposure and risk management practices. Southern Company Gas' wholesale gas operations use various contracts in its commercial activities that generally meet the definition of derivatives. For the traditional electric operating companies, Southern Power, and Southern Company Gas' other businesses, each company's policy is that derivatives are to be used primarily for hedging purposes and mandates strict adherence to all applicable risk management policies. Derivative positions are monitored using techniques including, but not limited to, market valuation, value at risk, stress testing, and sensitivity analysis. Derivative instruments are recognized at fair value in the balance sheets as either assets or liabilities and are presented on a net basis. See Note 13 for additional fair value information. In the statements of cash flows, any cash impacts of settled energy-related and interest rate derivatives are recorded as operating activities. Any cash impacts of settled foreign currency derivatives are classified as operating or financing activities to correspond with classification of the hedged interest or principal, respectively. See Note 1 under " Financial Instruments " for additional information.
The registrants adopted ASU 2017-12 as of January 1, 2018. See Note 1 under " Recently Adopted Accounting Standards Other " for additional information.
Energy-Related Derivatives
The traditional electric operating companies, Southern Power, and Southern Company Gas enter into energy-related derivatives to hedge exposures to electricity, natural gas, and other fuel price changes. However, due to cost-based rate regulations and other various cost recovery mechanisms, the traditional electric operating companies and the natural gas distribution utilities have limited exposure to market volatility in energy-related commodity prices. Each of the traditional electric operating companies and certain of the natural gas distribution utilities of Southern Company Gas manage fuel-hedging programs, implemented per the guidelines of their respective state PSCs or other applicable state regulatory agencies, through the use of financial derivative contracts, which are expected to continue to mitigate price volatility. The traditional electric operating companies (with respect to wholesale generating capacity) and Southern Power have limited exposure to market volatility in energy-related commodity prices because their long-term sales contracts shift substantially all fuel cost responsibility to the purchaser. However, the traditional electric operating companies and Southern Power may be exposed to market volatility in energy-related commodity

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Southern Company and Subsidiary Companies 2018 Annual Report

prices to the extent any uncontracted capacity is used to sell electricity. Southern Company Gas retains exposure to price changes that can, in a volatile energy market, be material and can adversely affect its results of operations.
Southern Company Gas also enters into weather derivative contracts as economic hedges of operating margins in the event of warmer-than-normal weather. Exchange-traded options are carried at fair value, with changes reflected in operating revenues. Non-exchange-traded options are accounted for using the intrinsic value method. Changes in the intrinsic value for non-exchange-traded contracts are reflected in operating revenues.
Energy-related derivative contracts are accounted for under one of three methods:
Regulatory Hedges – Energy-related derivative contracts designated as regulatory hedges relate primarily to the traditional electric operating companies' and the natural gas distribution utilities' fuel-hedging programs, where gains and losses are initially recorded as regulatory liabilities and assets, respectively, and then are included in fuel expense as the underlying fuel is used in operations and ultimately recovered through the respective fuel cost recovery clauses.
Cash Flow Hedges – Gains and losses on energy-related derivatives designated as cash flow hedges (which are mainly used to hedge anticipated purchases and sales) are initially deferred in AOCI before being recognized in the statements of income in the same period and in the same income statement line item as the earnings effect of the hedged transactions.
Not Designated – Gains and losses on energy-related derivative contracts that are not designated or fail to qualify as hedges are recognized in the statements of income as incurred.
Some energy-related derivative contracts require physical delivery as opposed to financial settlement, and this type of derivative is both common and prevalent within the electric and natural gas industries. When an energy-related derivative contract is settled physically, any cumulative unrealized gain or loss is reversed and the contract price is recognized in the respective line item representing the actual price of the underlying goods being delivered.
At December 31, 2018 , the net volume of energy-related derivative contracts for natural gas positions, together with the longest hedge date over which the respective entity is hedging its exposure to the variability in future cash flows for forecasted transactions and the longest non-hedge date for derivatives not designated as hedges, were as follows:
 
Net
Purchased
mmBtu
 
Longest
Hedge
Date
 
Longest
Non-Hedge
Date
 
(in millions)
 
 
 
 
Southern Company (*)
431
 
2022
 
2029
Alabama Power
74
 
2022
 
Georgia Power
153
 
2022
 
Mississippi Power
63
 
2022
 
Southern Power
15
 
2020
 
Southern Company Gas (*)
120
 
2021
 
2029
(*)
Southern Company Gas' derivative instruments include both long and short natural gas positions. A long position is a contract to purchase natural gas and a short position is a contract to sell natural gas. Southern Company Gas' volume represents the net of long natural gas positions of 4,159 million mmBtu and short natural gas positions of 4,039 million mmBtu at December 31, 2018 , which is also included in Southern Company's total volume.
At December 31, 2018 , the net volume of Southern Power's energy-related derivative contracts for power to be sold was 2 million MWHs, all of which expire by 2020 .
In addition to the volumes discussed above, the traditional electric operating companies and Southern Power enter into physical natural gas supply contracts that provide the option to sell back excess natural gas due to operational constraints. The maximum expected volume of natural gas subject to such a feature is 23 million mmBtu for Southern Company, which includes 4 million mmBtu for Alabama Power, 7 million mmBtu for Georgia Power, 3 million mmBtu for Mississippi Power, and 7 million mmBtu for Southern Power.
For cash flow hedges of energy-related derivatives, the estimated pre-tax gains (losses) expected to be reclassified from AOCI to earnings for the year ending December 31, 2019 are immaterial for all registrants.
Interest Rate Derivatives
Southern Company and certain subsidiaries may enter into interest rate derivatives to hedge exposure to changes in interest rates. The derivatives employed as hedging instruments are structured to minimize ineffectiveness. Derivatives related to existing

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variable rate securities or forecasted transactions are accounted for as cash flow hedges where the derivatives' fair value gains or losses are recorded in OCI and are reclassified into earnings at the same time and presented on the same income statement line item as the earnings effect of the hedged transactions. Derivatives related to existing fixed rate securities are accounted for as fair value hedges, where the derivatives' fair value gains or losses and hedged items' fair value gains or losses are both recorded directly to earnings on the same income statement line item. Fair value gains or losses on derivatives that are not designated or fail to qualify as hedges are recognized in the statements of income as incurred.
At December 31, 2018 , the following interest rate derivatives were outstanding:

Notional
Amount

Interest
Rate
Received

Weighted Average Interest
Rate Paid

Hedge
Maturity
Date

Fair Value
Gain (Loss) December 31, 2018

(in millions)







(in millions)
Fair Value Hedges of Existing Debt








Southern Company (*)
$
300

 
2.75%
 
3-month LIBOR + 0.92%
 
June 2020
 
$
(4
)
Southern Company (*)
1,500

 
2.35%
 
1-month LIBOR + 0.87%
 
July 2021
 
(43
)
Georgia Power
200

 
4.25%
 
3-month LIBOR + 2.46%
 
December 2019
 
(2
)
Southern Company Consolidated
$
2,000

 
 
 
 
 
 
 
$
(49
)
(*)
Represents the Southern Company parent entity.
The estimated pre-tax gains (losses) related to interest rate derivatives expected to be reclassified from AOCI to interest expense for the year ending December 31, 2019 are $(19) million for Southern Company and immaterial for all other registrants. Deferred gains and losses related to interest rate derivatives are expected to be amortized into earnings through 2046 for the Southern Company parent entity, 2035 for Alabama Power, 2037 for Georgia Power, 2028 for Mississippi Power, and 2046 for Southern Company Gas.
Foreign Currency Derivatives
Southern Company and certain subsidiaries, including Southern Power, may enter into foreign currency derivatives to hedge exposure to changes in foreign currency exchange rates, such as that arising from the issuance of debt denominated in a currency other than U.S. dollars. Derivatives related to forecasted transactions are accounted for as cash flow hedges where the derivatives' fair value gains or losses are recorded in OCI and are reclassified into earnings at the same time and on the same income statement line as the earnings effect of the hedged transactions, including foreign currency gains or losses arising from changes in the U.S. currency exchange rates. The derivatives employed as hedging instruments are structured to minimize ineffectiveness.
At December 31, 2018 , the following foreign currency derivatives were outstanding:
 
Pay Notional
Pay Rate
Receive Notional
Receive Rate
Hedge
Maturity Date
Fair Value
Gain (Loss) at December 31, 2018
 
(in millions)
 
(in millions)
 
 
(in millions)
Cash Flow Hedges of Existing Debt
 
 
 
 
 
Southern Power
$
677

2.95%
600

1.00%
June 2022
$
25

Southern Power
564

3.78%
500

1.85%
June 2026
27

Total
$
1,241

 
1,100

 
 
$
52

The estimated pre-tax gains (losses) related to Southern Power's foreign currency derivatives that will be reclassified from AOCI to earnings for the year ending December 31, 2019 are $(23) million .

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Derivative Financial Statement Presentation and Amounts
Southern Company, the traditional electric operating companies, Southern Power, and Southern Company Gas enter into derivative contracts that may contain certain provisions that permit intra-contract netting of derivative receivables and payables for routine billing and offsets related to events of default and settlements. Southern Company and certain subsidiaries also utilize master netting agreements to mitigate exposure to counterparty credit risk. These agreements may contain provisions that permit netting across product lines and against cash collateral. The fair value amounts of derivative assets and liabilities on the balance sheets are presented net to the extent that there are netting arrangements or similar agreements with the counterparties.
At December 31, 2018 and 2017 , the fair value of energy-related derivatives, interest rate derivatives, and foreign currency derivatives was reflected in the balance sheets as follows:
 
2018
2017
Derivative Category and Balance Sheet Location
Assets
Liabilities
Assets
Liabilities
 
(in millions)
Southern Company
 
 
 
 
Derivatives designated as hedging instruments for regulatory purposes
 
 
 
 
Energy-related derivatives:
 
 
 
 
Other current assets/Other current liabilities
$
8

$
23

$
10

$
43

Other deferred charges and assets/Other deferred credits and liabilities
9

26

7

24

Assets held for sale, current/Liabilities held for sale, current

6



Total derivatives designated as hedging instruments for regulatory purposes
$
17

$
55

$
17

$
67

Derivatives designated as hedging instruments in cash flow and fair value hedges
 
 
 
 
Energy-related derivatives:
 
 
 
 
Other current assets/Other current liabilities
$
3

$
7

$
3

$
14

Other deferred charges and assets/Other deferred credits and liabilities
1

2



Interest rate derivatives:
 
 
 
 
Other current assets/Other current liabilities

19

1

4

Other deferred charges and assets/Other deferred credits and liabilities

30


34

Foreign currency derivatives:
 
 
 
 
Other current assets/Other current liabilities

23


23

Other deferred charges and assets/Other deferred credits and liabilities
75


129


Total derivatives designated as hedging instruments in cash flow and fair value hedges
$
79

$
81

$
133

$
75

Derivatives not designated as hedging instruments
 
 
 
 
Energy-related derivatives:
 
 
 
 
Other current assets/Other current liabilities
$
561

$
575

$
380

$
437

Other deferred charges and assets/Other deferred credits and liabilities
180

325

170

215

Total derivatives not designated as hedging instruments
$
741

$
900

$
550

$
652

Gross amounts recognized
$
837

$
1,036

$
700

$
794

Gross amounts offset (a)
$
(524
)
$
(801
)
$
(405
)
$
(598
)
Net amounts recognized in the Balance Sheets (b)
$
313

$
235

$
295

$
196

 
 
 
 
 

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2018
2017
Derivative Category and Balance Sheet Location
Assets
Liabilities
Assets
Liabilities
 
(in millions)
Alabama Power
 
 
 
 
Derivatives designated as hedging instruments for regulatory purposes
 
 
 
 
Energy-related derivatives:
 
 
 
 
Other current assets/Other current liabilities
$
3

$
4

$
2

$
6

Other deferred charges and assets/Other deferred credits and liabilities
3

6

2

4

Total derivatives designated as hedging instruments for regulatory purposes
$
6

$
10

$
4

$
10

Gross amounts recognized
$
6

$
10

$
4

$
10

Gross amounts offset
$
(4
)
$
(4
)
$
(4
)
$
(4
)
Net amounts recognized in the Balance Sheets
$
2

$
6

$

$
6

 
 
 
 
 
Georgia Power
 
 
 
 
Derivatives designated as hedging instruments for regulatory purposes
 
 
 
 
Energy-related derivatives:
 
 
 
 
Other current assets/Other current liabilities
$
2

$
8

$
2

$
9

Other deferred charges and assets/Other deferred credits and liabilities
4

13

4

10

Total derivatives designated as hedging instruments for regulatory purposes
$
6

$
21

$
6

$
19

Derivatives designated as hedging instruments in cash flow and fair value hedges




 
 
Interest rate derivatives:




 
 
Other current assets/Other current liabilities
$

$
2

$

$
4

Other deferred charges and assets/Other deferred credits and liabilities



1

Total derivatives designated as hedging instruments in cash flow and fair value hedges
$

$
2

$

$
5

Gross amounts recognized
$
6

$
23

$
6

$
24

Gross amounts offset
$
(6
)
$
(6
)
$
(6
)
$
(6
)
Net amounts recognized in the Balance Sheets
$

$
17

$

$
18

 
 
 
 
 

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Southern Company and Subsidiary Companies 2018 Annual Report

 
2018
2017
Derivative Category and Balance Sheet Location
Assets
Liabilities
Assets
Liabilities
 
(in millions)
Mississippi Power
 
 
 
 
Derivatives designated as hedging instruments for regulatory purposes
 
 
 
 
Energy-related derivatives:
 
 
 
 
Other current assets/Other current liabilities
$
1

$
3

$
1

$
6

Other deferred charges and assets/Other deferred credits and liabilities
2

6

1

3

Total derivatives designated as hedging instruments for regulatory purposes
$
3

$
9

$
2

$
9

Gross amounts recognized
$
3

$
9

$
3

$
9

Gross amounts offset
$
(2
)
$
(2
)
$
(2
)
$
(2
)
Net amounts recognized in the Balance Sheets
$
1

$
7

$
1

$
7

 
 
 
 
 
Southern Power
 
 
 
 
Derivatives designated as hedging instruments in cash flow and fair value hedges
 
 
 
 
Energy-related derivatives:
 
 
 
 
Other current assets/Other current liabilities
$
3

$
6

$
3

$
11

Other deferred charges and assets/Other deferred credits and liabilities
1

2



Foreign currency derivatives:
 
 
 
 
Other current assets/Other current liabilities

23


23

Other deferred charges and assets/Other deferred credits and liabilities
75


129


Total derivatives designated as hedging instruments in cash flow and fair value hedges
$
79

$
31

$
132

$
34

Derivatives not designated as hedging instruments
 
 
 
 
Energy-related derivatives:
 
 
 
 
Other current assets/Other current liabilities
$

$

$

$
2

Total derivatives not designated as hedging instruments
$

$

$

$
2

Gross amounts recognized
$
79

$
31

$
132

$
36

Gross amounts offset
$
(3
)
$
(3
)
$
(3
)
$
(3
)
Net amounts recognized in the Balance Sheets
$
76

$
28

$
129

$
33

 
 
 
 
 

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Southern Company and Subsidiary Companies 2018 Annual Report

 
2018
2017
Derivative Category and Balance Sheet Location
Assets
Liabilities
Assets
Liabilities
 
(in millions)
Southern Company Gas
 
 
 
 
Derivatives designated as hedging instruments for regulatory purposes
 
 
 
 
Energy-related derivatives:
 
 
 
 
Assets from risk management activities/Liabilities from risk management activities-current
$
2

$
8

$
5

$
8

Other deferred charges and assets/Other deferred credits and liabilities

1



Total derivatives designated as hedging instruments for regulatory purposes
$
2

$
9

$
5

$
8

Derivatives designated as hedging instruments in cash flow and fair value hedges
 
 
 
 
Energy-related derivatives:
 
 
 
 
Assets from risk management activities/Liabilities from risk management activities-current
$

$
1

$

$
3

Total derivatives designated as hedging instruments in cash flow and fair value hedges
$

$
1

$

$
3

Derivatives not designated as hedging instruments
 
 
 
 
Energy-related derivatives:
 
 
 
 
Assets from risk management activities/Liabilities from risk management activities-current
$
559

$
574

$
379

$
434

Other deferred charges and assets/Other deferred credits and liabilities
180

325

170

215

Total derivatives not designated as hedging instruments
$
739

$
899

$
549

$
649

Gross amounts recognized
$
741

$
909

$
554

$
660

Gross amounts offset (a)
$
(508
)
$
(785
)
$
(390
)
$
(583
)
Net amounts recognized in the Balance Sheets (b)
$
233

$
124

$
164

$
77

(a)
Gross amounts offset include cash collateral held on deposit in broker margin accounts of $277 million and $193 million at December 31, 2018 and 2017 , respectively.
(b)
Net amounts of derivative instruments outstanding exclude premium and intrinsic value associated with weather derivatives of $8 million and $11 million at December 31, 2018 and 2017 , respectively.
Energy-related derivatives not designated as hedging instruments were immaterial for Alabama Power, Georgia Power, Mississippi Power, and Southern Power at December 31, 2018 and 2017 .

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Southern Company and Subsidiary Companies 2018 Annual Report

At December 31, 2018 and 2017 , the pre-tax effects of unrealized derivative gains (losses) arising from energy-related derivative instruments designated as regulatory hedging instruments and deferred were as follows:
Regulatory Hedge Unrealized Gain (Loss) Recognized in the Balance Sheet at December 31, 2018
Derivative Category and Balance Sheet
Location
Southern
Company
Alabama
Power
Georgia
Power
Mississippi
Power
Southern Company Gas
 
(in millions)
Energy-related derivatives:
 
 
 
 
 
Other regulatory assets, current
$
(19
)
$
(3
)
$
(6
)
$
(2
)
$
(8
)
Other regulatory assets, deferred
(16
)
(3
)
(9
)
(4
)

Assets held for sale, current
(6
)




Other regulatory liabilities, current
1




1

Total energy-related derivative gains (losses)
$
(40
)
$
(6
)
$
(15
)
$
(6
)
$
(7
)
Regulatory Hedge Unrealized Gain (Loss) Recognized in the Balance Sheet at December 31, 2017
Derivative Category and Balance Sheet
Location
Southern
Company (*)
Alabama
Power
Georgia
Power
Mississippi
Power
Southern Company Gas (*)
 
(in millions)
 
Energy-related derivatives:
 
 
 
 
 
Other regulatory assets, current
$
(34
)
$
(4
)
$
(7
)
$
(5
)
$
(4
)
Other regulatory assets, deferred
(18
)
(3
)
(6
)
(2
)

Other regulatory liabilities, current
7

1



7

Other regulatory liabilities, deferred
1





Total energy-related derivative gains (losses)
$
(44
)
$
(6
)
$
(13
)
$
(7
)
$
3

(*)
Fair value gains and losses recorded in regulatory assets and liabilities include cash collateral held on deposit in broker margin accounts of $6 million at December 31, 2017 .
For the years ended December 31, 2018 , 2017 , and 2016 , the pre-tax effects of cash flow hedge accounting on AOCI for the applicable registrants were as follows:
Gain (Loss) Recognized in OCI on Derivative
2018
2017
2016
 
(in millions)
Southern Company
 
 
 
Energy-related derivatives
$
17

$
(47
)
$
18

Interest rate derivatives
(1
)
(2
)
(180
)
Foreign currency derivatives
(78
)
140

(58
)
Total
$
(62
)
$
91

$
(220
)
Southern Power
 
 
 
Energy-related derivatives
$
10

$
(38
)
$
14

Foreign currency derivatives
(78
)
140

(58
)
Total
$
(68
)
$
102

$
(44
)

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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

 
Successor
 
 
Predecessor
Gain (Loss) Recognized in OCI on Derivative
Year Ended December 31, 2018
Year Ended December 31, 2017
July 1, 2016
through
December 31, 2016
 
 
January 1, 2016
through
June 30, 2016
 
(in millions)
 
 
(in millions)
Southern Company Gas
 
 
 
 
 
 
Energy-related derivatives
$
7

$
(9
)
$
2

 
 
$

Interest rate derivatives


(5
)
 
 
(64
)
Total
$
7

$
(9
)
$
(3
)
 
 
$
(64
)
For all years presented, the pre-tax effects of energy-related derivatives and interest rate derivatives designated as cash flow hedging instruments on AOCI were immaterial for the other registrants. In addition, for the years ended December 31, 2017 and 2016, there was no material ineffectiveness recorded in earnings for any registrant. Upon the adoption of ASU 2017-12, beginning in 2018, ineffectiveness was no longer separately measured and recorded in earnings. See Note 1 for additional information.

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Southern Company and Subsidiary Companies 2018 Annual Report

The pre-tax effects of cash flow and fair value hedge accounting on income for the years ended December 31, 2018 , 2017 , and 2016 were as follows:
Location and Amount of Gain (Loss) Recognized in Income on Cash Flow and Fair Value Hedging Relationships
2018
2017
2016
 
(in millions)
Southern Company
 
 
 
Total cost of natural gas
$
1,539

$
1,601

$
613

Gain (loss) on energy-related cash flow hedges (a)
2

(2
)
(1
)
Total depreciation and amortization
3,131

3,010

2,502

Gain (loss) on energy-related cash flow hedges (a)
7

(16
)
2

Total interest expense, net of amounts capitalized
(1,842
)
(1,694
)
(1,317
)
Gain (loss) on interest rate cash flow hedges (a)
(21
)
(21
)
(18
)
Gain (loss) on foreign currency cash flow hedges (a)
(24
)
(23
)
(13
)
Gain (loss) on interest rate fair value hedges (b)
(12
)
(22
)
(21
)
Total other income (expense), net
114

163

50

Gain (loss) on foreign currency cash flow hedges (a)(c)
(60
)
160

(82
)
Alabama Power
 
 
 
Total interest expense, net of amounts capitalized
$
(323
)
$
(305
)
$
(302
)
Gain (loss) on interest rate cash flow hedges (a)
(6
)
(6
)
(6
)
Georgia Power
 
 
 
Total interest expense, net of amounts capitalized
$
(397
)
$
(419
)
$
(388
)
Gain (loss) on interest rate cash flow hedges (a)
(4
)
(4
)
(4
)
Gain (loss) on interest rate fair value hedges (b)
2

(3
)
(1
)
Mississippi Power
 
 
 
Total interest expense, net of amounts capitalized
$
(76
)
$
(42
)
$
(74
)
Gain (loss) on interest rate cash flow hedges (a)
(2
)
(2
)
3

Southern Power
 
 
 
Total depreciation and amortization
$
493

$
503

$
352

Gain (loss) on energy-related cash flow hedges (a)
7

(17
)
2

Total interest expense, net of amounts capitalized
(183
)
(191
)
(117
)
Gain (loss) on foreign currency cash flow hedges (a)
(24
)
(23
)
(13
)
Total other income (expense), net
23

1

6

Gain (loss) on foreign currency cash flow hedges (a)(c)
(60
)
159

(82
)
(a)
Reclassified from AOCI into earnings.
(b)
For fair value hedges, changes in the fair value of the derivative contracts are generally equal to changes in the fair value of the underlying debt and have no material impact on income.
(c)
The reclassification from AOCI into other income (expense), net completely offsets currency gains and losses arising from changes in the U.S. currency exchange rates used to record the euro-denominated notes.

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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

 
Successor
 
 
Predecessor
Location and Amount of Gain (Loss) Recognized in Income on Cash Flow and Fair Value Hedging Relationships
Year Ended December 31, 2018
Year Ended December 31, 2017
July 1, 2016
through
December 31, 2016
 
 
January 1, 2016
through
June 30, 2016
 
(in millions)
 
 
(in millions)
Southern Company Gas
 
 
 
 
 
 
Total cost of natural gas
$
1,539

$
1,601

$
613

 
 
$
755

Gain (loss) on energy-related cash flow hedges (*)
2

(2
)
(1
)
 
 
(1
)
(*)
Amounts reflect gains or losses on cash flow hedges that were reclassified from AOCI into earnings.
The pre-tax effects of cash flow hedge accounting on income for interest rate derivatives were immaterial for all other registrants for all years presented.
At December 31, 2018 and 2017 , the following amounts were recorded on the balance sheets related to cumulative basis adjustments for fair value hedges:
 
Carrying Amount of the Hedged Item
 
Cumulative Amount of Fair Value Hedging Adjustment included in Carrying Amount of the Hedged Item
Balance Sheet Location of Hedged Items
At December 31, 2018
At December 31, 2017
 
At December 31, 2018
At December 31, 2017
 
(in millions)
 
(in millions)
Southern Company
 
 
 
 
 
Securities due within one year
$
(498
)
$
(746
)
 
$
2

$
3

Long-term debt
(2,052
)
(2,553
)
 
41

35

 
 
 
 
 
 
Georgia Power
 
 
 
 
 
Securities due within one year
$
(498
)
$
(746
)
 
$
2

$
3

Long-term debt

(498
)
 

1

The pre-tax effects of energy-related derivatives not designated as hedging instruments on the statements of income for the years ended December 31, 2018 , 2017 , and 2016 for the applicable registrants were as follows:


Gain (Loss)
Derivatives in Non-Designated Hedging Relationships
Statements of Income Location
2018

2017

2016


(in millions)
Southern Company
 
 
 
 
 
 
Energy-related derivatives
Natural gas revenues (*)
$
(122
)
 
$
(80
)
 
$
33

 
Cost of natural gas
(6
)
 
(2
)
 
3

 
Wholesale electric revenues
2

 
(4
)
 
2

Total derivatives in non-designated hedging relationships
$
(126
)

$
(86
)

$
38

(*)
Excludes the impact of weather derivatives recorded in natural gas revenues of $5 million , $23 million , and $6 million for the years ended December 31, 2018 , 2017 , and 2016 , respectively, as they are accounted for based on intrinsic value rather than fair value.

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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

 
 
Gain (Loss)
 
 
Successor
 
 
Predecessor
Derivatives in Non-Designated Hedging Relationships
Statements of Income Location
For the Year Ended December 31, 2018
For the Year Ended December 31, 2017
July 1, 2016
through
December 31, 2016
 
 
January 1, 2016 through
June 30, 2016
 
 
 
(in millions)
 
 
(in millions)
Southern Company Gas
 
 
 
 
 
 
 
Energy-related derivatives
Natural gas revenues (*)
$
(122
)
$
(80
)
$
33

 
 
$
(1
)
 
Cost of natural gas
(6
)
(2
)
3

 
 
(62
)
Total derivatives in non-designated hedging relationships
$
(128
)
$
(82
)
$
36

 
 
$
(63
)
(*)
Excludes the impact of weather derivatives recorded in natural gas revenues of $5 million and $23 million for the successor years ended December 31, 2018 and 2017 , respectively, $6 million for the successor period of July 1, 2016 through December 31, 2016 , and $3 million for the predecessor period of January 1, 2016 through June 30, 2016 , as they are accounted for based on intrinsic value rather than fair value.
The pre-tax effects of energy-related derivatives and interest rate derivatives not designated as hedging instruments were immaterial for all other registrants for all years presented.
Contingent Features
Southern Company, the traditional electric operating companies, Southern Power, and Southern Company Gas do not have any credit arrangements that would require material changes in payment schedules or terminations as a result of a credit rating downgrade. There are certain derivatives that could require collateral, but not accelerated payment, in the event of various credit rating changes of certain Southern Company subsidiaries. At December 31, 2018 , the registrants had no collateral posted with derivative counterparties to satisfy these arrangements.
For the registrants with interest rate derivatives at December 31, 2018 , the fair value of interest rate derivative liabilities with contingent features and the maximum potential collateral requirements arising from the credit-risk-related contingent features, at a rating below BBB- and/or Baa3, was immaterial. At December 31, 2018 , the fair value of energy-related derivative liabilities with contingent features and the maximum potential collateral requirements arising from the credit-risk-related contingent features, at a rating below BBB- and/or Baa3, were immaterial for all registrants. The maximum potential collateral requirements arising from the credit-risk-related contingent features for the traditional electric operating companies and Southern Power include certain agreements that could require collateral in the event that one or more Southern Company power pool participants has a credit rating change to below investment grade. Following the sale of Gulf Power to NextEra Energy, Gulf Power is continuing to participate in the Southern Company power pool for a defined transition period that, subject to certain potential adjustments, is scheduled to end on January 1, 2024.
Generally, collateral may be provided by a Southern Company guaranty, letter of credit, or cash. If collateral is required, fair value amounts recognized for the right to reclaim cash collateral or the obligation to return cash collateral are not offset against fair value amounts recognized for derivatives executed with the same counterparty.
Alabama Power and Southern Power maintain accounts with certain regional transmission organizations to facilitate financial derivative transactions. Based on the value of the positions in these accounts and the associated margin requirements, Alabama Power and Southern Power may be required to post collateral. At December 31, 2018 , cash collateral posted in these accounts was immaterial. Southern Company Gas maintains accounts with brokers or the clearing houses of certain exchanges to facilitate financial derivative transactions. Based on the value of the positions in these accounts and the associated margin requirements, Southern Company Gas may be required to deposit cash into these accounts. At December 31, 2018 , cash collateral held on deposit in broker margin accounts was $277 million .
The registrants are exposed to losses related to financial instruments in the event of counterparties' nonperformance. The registrants only enter into agreements and material transactions with counterparties that have investment grade credit ratings by Moody's and S&P or with counterparties who have posted collateral to cover potential credit exposure. The registrants have also established risk management policies and controls to determine and monitor the creditworthiness of counterparties in order to mitigate their exposure to counterparty credit risk. Prior to entering into a physical transaction, Southern Company Gas assigns physical wholesale counterparties an internal credit rating and credit limit based on the counterparties' Moody's, S&P, and Fitch ratings, commercially available credit reports, and audited financial statements. Southern Company Gas may require counterparties to pledge additional collateral when deemed necessary.

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Southern Company and Subsidiary Companies 2018 Annual Report

In addition, Southern Company Gas conducts credit evaluations and obtains appropriate internal approvals for the counterparty's line of credit before any transaction with the counterparty is executed. In most cases, the counterparty must have an investment grade rating, which includes a minimum long-term debt rating of Baa3 from Moody's and BBB- from S&P. Generally, Southern Company Gas requires credit enhancements by way of a guaranty, cash deposit, or letter of credit for transaction counterparties that do not have investment grade ratings.
Southern Company Gas also utilizes master netting agreements whenever possible to mitigate exposure to counterparty credit risk. When Southern Company Gas is engaged in more than one outstanding derivative transaction with the same counterparty and it also has a legally enforceable netting agreement with that counterparty, the "net" mark-to-market exposure represents the netting of the positive and negative exposures with that counterparty and a reasonable measure of Southern Company Gas' credit risk. Southern Company Gas also uses other netting agreements with certain counterparties with whom it conducts significant transactions. Master netting agreements enable Southern Company Gas to net certain assets and liabilities by counterparty. Southern Company Gas also nets across product lines and against cash collateral provided the master netting and cash collateral agreements include such provisions. Southern Company Gas may require counterparties to pledge additional collateral when deemed necessary.
The registrants do not anticipate a material adverse effect on their respective financial statements as a result of counterparty nonperformance.
15 . ACQUISITIONS AND DISPOSITIONS
Southern Company Merger with Southern Company Gas
On July 1, 2016, Southern Company completed the Merger for a total purchase price of approximately $8.0 billion and Southern Company Gas became a wholly-owned, direct subsidiary of Southern Company. At the effective time of the Merger, each share of Southern Company Gas common stock, other than certain excluded shares, was converted into the right to receive $66 in cash, without interest. Also at the effective time of the Merger, all of the outstanding Southern Company Gas RSUs, restricted stock awards, non-employee director stock awards, stock options, and PSUs were either redeemed or converted into Southern Company RSUs. See Note 12 for additional information.
The application of the acquisition method of accounting was pushed down to Southern Company Gas. The excess of the purchase price over the fair values of Southern Company Gas' assets and liabilities was recorded as goodwill, which represents a different basis of accounting from Southern Company Gas' historical basis prior to the Merger. The following table presents the final purchase price allocation:
 
Southern
Company Gas Successor
 
 
Southern
Company Gas Predecessor
 
 
Southern Company Gas Purchase Price
New Basis
 
 
Old Basis
 
Change in Basis
 
(in millions)
 
 
(in millions)
Current assets
$
1,557

 
 
$
1,474

 
$
83

Property, plant, and equipment
10,108

 
 
10,148

 
(40
)
Goodwill
5,967

 
 
1,813

 
4,154

Other intangible assets
400

 
 
101

 
299

Regulatory assets
1,118

 
 
679

 
439

Other assets
229

 
 
273

 
(44
)
Current liabilities
(2,201
)
 
 
(2,205
)
 
4

Other liabilities
(4,742
)
 
 
(4,600
)
 
(142
)
Long-term debt
(4,261
)
 
 
(3,709
)
 
(552
)
Contingently redeemable noncontrolling interest
(174
)
 
 
(41
)
 
(133
)
Total purchase price
$
8,001

 
 
$
3,933

 
$
4,068


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Southern Company and Subsidiary Companies 2018 Annual Report

Southern Company Gas' Results of Operations and Pro Forma Financial Information
The results of operations for Southern Company Gas have been included in Southern Company's consolidated financial statements from the date of acquisition and consisted of operating revenues of $1.7 billion and net income of $114 million in 2016.
The following summarized unaudited pro forma consolidated statement of earnings information assumes that the acquisition of Southern Company Gas was completed on January 1, 2015. The summarized unaudited pro forma consolidated statement of earnings information includes adjustments for (i) intercompany sales, (ii) amortization of intangible assets, (iii) adjustments to interest expense to reflect current interest rates on Southern Company Gas debt and additional interest expense associated with borrowings by Southern Company to fund the Merger, and (iv) the elimination of nonrecurring expenses associated with the Merger.
 
2016
 
 
Operating revenues (in millions)
$
21,791

Net income attributable to Southern Company (in millions)
$
2,591

Basic EPS
$
2.70

Diluted EPS
$
2.68

These unaudited pro forma results are for comparative purposes only and may not be indicative of the results that would have occurred had this acquisition been completed on January 1, 2015 or the results that would be attained in the future.
Southern Company Acquisition of PowerSecure
In May 2016, Southern Company acquired all of the outstanding stock of PowerSecure for $18.75 per common share in cash, resulting in an aggregate purchase price of $429 million . As a result, PowerSecure became a wholly-owned subsidiary of Southern Company.
The acquisition of PowerSecure was accounted for using the acquisition method of accounting with the assets acquired and liabilities assumed recognized at fair value as of the acquisition date. The following table presents the final purchase price allocation:
PowerSecure Purchase Price
 
 
(in millions)
Current assets
$
172

Property, plant, and equipment
46

Intangible assets
106

Goodwill
284

Other assets
4

Current liabilities
(121
)
Long-term debt, including current portion
(48
)
Deferred credits and other liabilities
(14
)
Total purchase price
$
429

The results of operations for PowerSecure have been included in Southern Company's consolidated financial statements from the date of acquisition and are immaterial to the consolidated financial results of Southern Company. Pro forma results of operations have not been presented for the acquisition because the effects of the acquisition were immaterial to Southern Company's consolidated financial results for all periods presented.
Southern Company's Sale of Gulf Power
On January 1, 2019, Southern Company completed the sale of all of the capital stock of Gulf Power to 700 Universe, LLC, a wholly-owned subsidiary of NextEra Energy, for an aggregate cash purchase price of approximately $5.8 billion (less $1.3 billion of indebtedness assumed), subject to customary working capital adjustments.

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Southern Company and Subsidiary Companies 2018 Annual Report

The assets and liabilities of Gulf Power are classified as assets held for sale and liabilities held for sale on Southern Company's balance sheet as of December 31, 2018. See " Assets Held for Sale " herein for additional information.
Southern Power
During 2018 and 2017 , Southern Power or one of its wholly-owned subsidiaries acquired or completed construction of the facilities discussed below. Acquisition-related costs were expensed as incurred and were not material for any of the years presented.
Acquisitions During the Year Ended December 31, 2018
During 2018 , Southern Power acquired and completed the project below and acquired the Wild Horse Mountain and Reading wind facilities discussed under " Construction Projects Completed and/or in Progress " below.
Project Facility
Resource
Seller, Acquisition Date
Approximate Nameplate Capacity ( MW )
 
Location
Ownership Percentage
Actual COD
PPA Contract Period
Gaskell West 1
Solar
Recurrent Energy Development Holdings, LLC,
January 26, 2018
20
 
Kern County, CA
100% of Class B
(*)  
March
2018
20 years
(*)
Southern Power owns 100% of the class B membership interests under a tax equity partnership.
The Gaskell West 1 facility did not have operating revenues or activities prior to being placed in service during March 2018.
Acquisitions During the Year Ended December 31, 2017
The following table presents Southern Power's acquisition activity for the year ended December 31, 2017.
Project Facility
Resource
Seller, Acquisition Date
Approximate Nameplate Capacity ( MW )
 
Location
Ownership Percentage
Actual COD
PPA Contract Period
Bethel
Wind
Invenergy Wind Global LLC,
January 6, 2017
276
 
Castro County, TX
100
%
 
January 2017
12 years
Cactus Flats (*)
Wind
RES America Developments, Inc.,
July 31, 2017
148
 
Concho County, TX
100
%
 
July 2018
12 years and 15 years
(*)
On July 31, 2017, Southern Power purchased 100% of the Cactus Flats facility. In August 2018, Southern Power closed on a tax equity partnership and owns 100% of the class B membership interests.
Southern Power's aggregate purchase price for acquisitions during the year ended December 31, 2017 was $539 million . The fair values of the assets acquired and liabilities assumed were finalized in 2017 and recorded as follows:
 
2017
 
(in millions)
Restricted cash
$
16

CWIP
534

Other assets
5

Accounts payable
(16
)
Total purchase price
$
539

In 2017 , total revenues of $15 million and net income of $17 million , primarily as a result of PTCs, were recognized in the consolidated statements of income by Southern Power related to the 2017 acquisitions. The Bethel facility did not have operating revenues or activities prior to completion of construction and being placed in service, and the Cactus Flats facility was still under construction. Therefore, supplemental pro forma information as though the acquisitions occurred as of the beginning of 2017 is not meaningful and has been omitted.

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Construction Projects Completed and/or in Progress
During 2018 , in accordance with its growth strategy, Southern Power started, continued, or completed construction of the projects set forth in the table below. Total aggregate construction costs, excluding the acquisition costs, are expected to be between $575 million and $640 million for the Plant Mankato expansion, Wild Horse Mountain, and Reading facilities. At December 31, 2018, construction costs included in CWIP related to these projects totaled $289 million , except for the Plant Mankato expansion which is classified as assets held for sale in the financial statements. The ultimate outcome of these matters cannot be determined at this time.
Project Facility
Resource
Approximate Nameplate Capacity ( MW )
Location
Actual/Expected
COD
PPA Counterparties
PPA Contract Period
Construction Projects Completed During the Year Ended December 31, 2018
Cactus Flats (a)
Wind
148
Concho County, TX
July 2018
General Motors, LLC
and
General Mills Operations, LLC
12 years
and
15 years
Projects Under Construction at December 31, 2018
Mankato expansion (b)
Natural Gas
385
Mankato, MN
Second quarter 2019
Northern States Power Company
20 years
Wild Horse Mountain (c)
Wind
100
Pushmataha County, OK
Fourth quarter 2019
Arkansas Electric Cooperative
20 years
Reading (d)
Wind
200
Osage and Lyon Counties, KS
Second quarter 2020
Royal Caribbean Cruises LTD
12 years
(a)
In July 2017, Southern Power purchased 100% of the Cactus Flats facility. In August 2018, Southern Power closed on a tax equity partnership and now owns 100% of the class B membership interests.
(b)
In November 2018, Southern Power entered into an agreement to sell all of its equity interests in Plant Mankato, including this expansion currently under construction. See "Sales of Natural Gas Plants" below.
(c)
In May 2018, Southern Power purchased 100% of the Wild Horse Mountain facility. Southern Power may enter into a tax equity partnership, in which case it would then own 100% of the class B membership interests. The ultimate outcome of this matter cannot be determined at this time.
(d)
In August 2018, Southern Power purchased 100% of the membership interests of the Reading facility from the joint development arrangement with Renewable Energy Systems Americas, Inc. described below. Southern Power may enter into a tax equity partnership, in which case it would then own 100% of the class B membership interests. The ultimate outcome of this matter cannot be determined at this time.
Development Projects
During 2017, Southern Power purchased wind turbine equipment to be used for various development and construction projects. Any wind projects using this equipment and reaching commercial operation by the end of 2021 are expected to qualify for 80% PTCs.
During 2016, Southern Power entered into a joint development agreement with Renewable Energy Systems Americas, Inc. (RES) to develop and construct wind projects. Concurrent with the agreement, Southern Power purchased wind turbine equipment from Siemens Wind Power, Inc. and Vestas-American Wind Technology, Inc. to be used for construction of these projects. Several wind projects using this equipment, as well as other purchased equipment, have successfully originated, directly or indirectly, from the partnership with RES and are expected to reach commercial operation before the end of 2020, thus qualifying for 100% PTCs.
Southern Power continues to evaluate and refine the deployment of the wind turbine equipment to potential joint development and construction projects as well as the amount of MW capacity to be constructed. During the third quarter 2018, as a result of a review of various options for probable dispositions of wind turbine equipment not deployed to development or construction projects, Southern Power recorded a $36 million asset impairment charge on the equipment.
Subsequent to December 31, 2018 and as part of management's continuous review of disposition options, approximately $53 million of this equipment is being marketed for sale and will be classified as held for sale.
The ultimate outcome of these matters cannot be determined at this time.
Sales of Renewable Facility Interests
On May 22, 2018, Southern Power completed the sale of a noncontrolling 33% equity interest in SP Solar, a limited partnership indirectly owning substantially all of Southern Power's solar facilities, to Global Atlantic for approximately $1.2 billion . Since Southern Power retains control of the limited partnership through its wholly-owned general partner, the sale was recorded as an

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equity transaction and Southern Power will continue to consolidate SP Solar in its financial statements. On the date of the transaction, the noncontrolling interest was increased by $511 million to reflect 33% of the carrying value of the partnership. This difference, partially offset by the tax impact and other related transaction charges, also resulted in a $410 million decrease to Southern Power's common stockholder's equity.
On December 11, 2018, Southern Power completed the sale of a noncontrolling tax equity interest in SP Wind, which owns a portfolio of eight operating wind facilities, to three financial investors for approximately $1.2 billion . Since Southern Power retains control of SP Wind, it will continue to consolidate SP Wind in its financial statements. The tax equity investors together will generally receive 40% of the cash distributions from available cash and will receive a 99% allocation of tax attributes, including future PTCs.
Sales of Natural Gas Plants
On December 4, 2018, Southern Power completed the sale of all of its equity interests in the Florida Plants to NextEra Energy for $203 million . In contemplation of this sale transaction, Southern Power recorded an asset impairment charge of approximately $119 million ( $89 million after tax) in May 2018.
On November 5, 2018, Southern Power entered into an agreement with Northern States Power to sell all of its equity interests in Plant Mankato (including the 385 -MW expansion currently under construction) for an aggregate purchase price of approximately $650 million . The completion of the disposition is subject to the expansion unit reaching commercial operation as well as various other customary conditions to closing, including working capital and timing adjustments. The ultimate purchase price will decrease $66,667 per day for each day after June 1, 2019 that the expansion has not achieved commercial operation, not to exceed $15 million . This transaction is subject to FERC and state commission approvals and is expected to close in mid-2019. The assets and liabilities of Plant Mankato are classified as assets held for sale and liabilities held for sale on Southern Company's and Southern Power's balance sheet as of December 31, 2018. See " Assets Held for Sale " herein for additional information. The ultimate outcome of this matter cannot be determined at this time.
Southern Company Gas
See " Southern Company Merger with Southern Company Gas " herein for information regarding the Merger.
Investment in SNG
In 2016, Southern Company Gas, through a wholly-owned, indirect subsidiary, acquired a 50% equity interest in SNG from Kinder Morgan, Inc. for $1.4 billion . SNG owns a 7,000 -mile pipeline system connecting natural gas supply basins in Texas, Louisiana, Mississippi, and Alabama to markets in Louisiana, Mississippi, Alabama, Florida, Georgia, South Carolina, and Tennessee. The purchase price exceeded the underlying ownership interest in the net assets of SNG by approximately $700 million . This basis difference was attributable to goodwill and deferred tax assets. While the deferred tax assets will be amortized through deferred tax expense, the goodwill will not be amortized and is not required to be tested for impairment on an annual basis.
In March 2017, Southern Company Gas made an additional $50 million contribution to maintain its 50% equity interest in SNG. See Note 7 under "Southern Company Gas" for additional information on this investment.
Southern Company Gas' investment in SNG decreased by $104 million at December 31, 2017 related to the impact of the Tax Reform Legislation and new income tax apportionment factors in several states resulting from Southern Company Gas' inclusion in the consolidated Southern Company state tax filings.
Sale of Pivotal Home Solutions
On June 4, 2018, Southern Company Gas completed the stock sale of Pivotal Home Solutions to American Water Enterprises LLC for a total cash purchase price of $365 million , which includes the final working capital adjustment. This disposition resulted in a net loss of $67 million , which includes $34 million of income tax expense. In contemplation of the transaction, a goodwill impairment charge of $42 million was recorded during the first quarter 2018. The income tax expense included tax on goodwill not deductible for tax purposes and for which a deferred tax liability had not been recorded previously. Southern Company Gas and American Water Enterprises LLC entered into a transition services agreement whereby Southern Company Gas provided certain administrative and operational services through November 4, 2018.
Sale of Elizabethtown Gas and Elkton Gas
On July 1, 2018, a Southern Company Gas subsidiary, Pivotal Utility Holdings, completed the sales of the assets of two of its natural gas distribution utilities, Elizabethtown Gas and Elkton Gas, to South Jersey Industries, Inc. for a total cash purchase price

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of $1.7 billion , which includes the final working capital and other adjustments. This disposition resulted in a pre-tax gain that was entirely offset by $205 million of income tax expense, resulting in no material net income impact. The income tax expense included tax on goodwill not deductible for tax purposes and for which a deferred tax liability had not been recorded previously. Southern Company Gas and South Jersey Industries, Inc. entered into transition services agreements whereby Southern Company Gas will provide certain administrative and operational services through no later than July 31, 2020.
Sale of Florida City Gas
On July 29, 2018, Southern Company Gas and its wholly-owned direct subsidiary, NUI Corporation, completed the stock sale of Pivotal Utility Holdings, which primarily consisted of Florida City Gas, to NextEra Energy for a total cash purchase price of $587 million , which includes the final working capital adjustment. This disposition resulted in a net gain of $16 million , which includes $103 million of income tax expense. The income tax expense included tax on goodwill not deductible for tax purposes and for which a deferred tax liability had not been recorded previously. Southern Company Gas and NextEra Energy entered into a transition services agreement whereby Southern Company Gas will provide certain administrative and operational services through no later than July 29, 2020.
Assets Held for Sale
As discussed previously, Southern Company and Southern Power each have assets and liabilities held for sale on their balance sheets at December 31, 2018 . Assets and liabilities held for sale have been classified separately on each company's balance sheet at the lower of carrying value or fair value less costs to sell at the time the criteria for held-for-sale classification were met. For assets and liabilities held for sale recorded at fair value on a nonrecurring basis, the fair value of assets held for sale is based primarily on unobservable inputs (Level 3), which includes the agreed upon sales prices in executed sales agreements.
Upon classification as held for sale in May 2018 for the Florida Plants and November 2018 for Plant Mankato, Southern Power ceased recognizing depreciation on the property, plant, and equipment to be sold. The Florida Plants sale was completed on December 4, 2018. Since the depreciation of the assets sold in the Gulf Power transaction continued to be reflected in customer rates through the closing date and was reflected in the carryover basis of the assets when sold, Southern Company continued to record depreciation on those assets through the date the transaction closed. Likewise, since the depreciation of the assets sold in the Elizabethtown Gas, Elkton Gas, and Florida City Gas transactions continued to be reflected in customer rates and was reflected in the carryover basis of the assets when sold, Southern Company Gas continued to record depreciation on those assets through the respective date that each transaction closed.
The following table provides Southern Company's and Southern Power's major classes of assets and liabilities classified as held for sale at December 31, 2018 :
 
Southern Company
Southern
Power
 
(in millions)
Assets Held for Sale:
 
 
Current assets
$
393

$
8

Total property, plant, and equipment
4,623

576

Other non-current assets
727


Total Assets Held for Sale
$
5,743

$
584

 
 
 
Liabilities Held for Sale:
 
 
Current liabilities
$
425

$
15

Long-term debt
1,286


Accumulated deferred income taxes
618


Other non-current liabilities
932


Total Liabilities Held for Sale
$
3,261

$
15

Southern Company, Southern Power, and Southern Company Gas each concluded that the asset sales, both individually and combined, did not represent a strategic shift in operations that has, or is expected to have, a major effect on its operations and financial results; therefore, none of the assets related to the sales have been classified as discontinued operations for any of the periods presented.

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Gulf Power and the Florida Plants represent individually significant components of Southern Company and Southern Power, respectively; therefore, pre-tax income for these components for the years ended December 31, 2018 , 2017 , and 2016 are presented below:
 
2018
2017
2016
 
(in millions)
Earnings (loss) before income taxes:
 
 
 
Gulf Power
$
140

$
229

$
231

Southern Power's Florida Plants (*)
$
49

$
37

$
37

(*)
Earnings before income taxes for the Florida Plants in 2018 represents the period from January 1, 2018 to December 4, 2018 (the divestiture date).
16 . SEGMENT AND RELATED INFORMATION
Southern Company
The primary businesses of the Southern Company system are electricity sales by the traditional electric operating companies and Southern Power and the distribution of natural gas by Southern Company Gas. The traditional electric operating companies – Alabama Power, Georgia Power, Gulf Power (through December 31, 2018), and Mississippi Power – are vertically integrated utilities providing electric service in four Southeastern states. On January 1, 2019, Southern Company completed its sale of Gulf Power to NextEra Energy. Southern Power develops, constructs, acquires, owns, and manages power generation assets, including renewable energy projects, and sells electricity at market-based rates in the wholesale market. Southern Company Gas distributes natural gas through its natural gas distribution utilities and is involved in several other complementary businesses including gas pipeline investments, wholesale gas services, and gas marketing services. In July 2018, Southern Company Gas completed sales of three of its natural gas distribution utilities. See Note 15 for additional information regarding disposition activities.
Southern Company's reportable business segments are the sale of electricity by the traditional electric operating companies, the sale of electricity in the competitive wholesale market by Southern Power, and the sale of natural gas and other complementary products and services by Southern Company Gas. Revenues from sales by Southern Power to the traditional electric operating companies were $435 million , $392 million , and $419 million in 2018 , 2017 , and 2016 , respectively. Revenues from sales of natural gas from Southern Company Gas to the traditional electric operating companies and Southern Power were $32 million and $119 million , respectively, in 2018 , $23 million and $119 million , respectively, in 2017 , and $11 million and $17 million , respectively, in 2016 . The "All Other" column includes the Southern Company parent entity, which does not allocate operating expenses to business segments. Also, this category includes segments below the quantitative threshold for separate disclosure. These segments include providing energy technologies and services to electric utilities and large industrial, commercial, institutional, and municipal customers, as well as investments in telecommunications and leveraged lease projects. All other inter-segment revenues are not material.

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Financial data for business segments and products and services for the years ended December 31, 2018 , 2017 , and 2016 was as follows:
 
Electric Utilities
 
 
 
 
 
Traditional
Electric
Operating
Companies
Southern
Power
Eliminations
Total
Southern Company Gas
All
Other
Eliminations
Consolidated
 
(in millions)
2018
 
 
 
 
 
 
 
 
Operating revenues
$
16,843

$
2,205

$
(477
)
$
18,571

$
3,909

$
1,213

$
(198
)
$
23,495

Depreciation and amortization
2,072

493


2,565

500

66


3,131

Interest income
23

8


31

4

8

(5
)
38

Earnings from equity method investments
(1
)


(1
)
148

2

(1
)
148

Interest expense
852

183


1,035

228

580

(1
)
1,842

Income taxes (benefit)
371

(164
)

207

464

(222
)

449

Segment net income (loss) (a)(b)(c)(d)
2,117

187


2,304

372

(453
)
3

2,226

Goodwill

2



2

5,015

298


5,315

Total assets
79,382

14,883

(306
)
93,959

21,448

3,285

(1,778
)
116,914

Gross property additions
6,077

315


6,392

1,399

414


8,205

2017
 
 
 
 
 
 
 
 
Operating revenues
$
16,884

$
2,075

$
(419
)
$
18,540

$
3,920

$
741

$
(170
)
$
23,031

Depreciation and amortization
1,954

503


2,457

501

52


3,010

Interest income
14

7


21

3

11

(9
)
26

Earnings from equity method investments
1



1

106

(1
)

106

Interest expense
820

191


1,011

200

490

(7
)
1,694

Income taxes (benefit)
1,021

(939
)

82

367

(307
)

142

Segment net income (loss) (a)(b)(e)(f)
(193
)
1,071


878

243

(279
)

842

Goodwill

2


2

5,967

299


6,268

Total assets
72,204

15,206

(325
)
87,085

22,987

2,552

(1,619
)
111,005

Gross property additions
3,836

268


4,104

1,525

355


5,984

2016
 
 
 
 
 
 
 
 
Operating revenues
$
16,803

$
1,577

$
(439
)
$
17,941

$
1,652

$
463

$
(160
)
$
19,896

Depreciation and amortization
1,881

352


2,233

238

31


2,502

Interest income
6

7


13

2

20

(15
)
20

Earnings from equity method investments
2



2

60

(3
)

59

Interest expense
814

117


931

81

317

(12
)
1,317

Income taxes (benefit)
1,286

(195
)

1,091

76

(216
)

951

Segment net income (loss) (a)(b)
2,233

338


2,571

114

(230
)
(7
)
2,448

Goodwill

2


2

5,967

282


6,251

Total assets
72,141

15,169

(316
)
86,994

21,853

2,474

(1,624
)
109,697

Gross property additions
4,852

2,114


6,966

618

41

(1
)
7,624

(a)
Attributable to Southern Company.
(b)
Segment net income (loss) for the traditional electric operating companies includes pre-tax charges for estimated losses on plants under construction of $1.1 billion ( $722 million after tax) in 2018 , $3.4 billion ( $2.4 billion after tax) in 2017 , and $428 million ( $264 million after tax) in 2016 . See Note 2 under " Georgia Power Nuclear Construction " and " Mississippi Power Kemper County Energy Facility Schedule and Cost Estimate " for additional information.
(c)
Segment net income (loss) for Southern Power includes pre-tax impairment charges of $156 million ( $117 million after tax) in 2018. See Note 15 under " Southern Power Development Projects " and " – Sales of Natural Gas Plants " for additional information.
(d)
Segment net income (loss) for Southern Company Gas includes a net gain on dispositions of $291 million ( $51 million loss after tax) in 2018 related to the Southern Company Gas Dispositions and a goodwill impairment charge of $42 million in 2018 related to the sale of Pivotal Home Solutions. See Note 15 under " Southern Company Gas " for additional information.
(e)
Segment net income (loss) for the traditional electric operating companies includes a pre-tax charge for the write-down of Gulf Power's ownership of Plant Scherer Unit 3 of $33 million ( $20 million after tax) in 2017. See Note 2 under " Southern Company Gulf Power " for additional information.
(f)
Segment net income (loss) includes income tax expense of $367 million for the traditional electric operating companies, income tax benefit of $743 million for Southern Power, and income tax expense of $93 million for Southern Company Gas in 2017 related to the Tax Reform Legislation.

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Products and Services
Electric Utilities' Revenues
Year
Retail
 
Wholesale
 
Other
 
Total
 
(in millions)
2018
$
15,222

 
$
2,516

 
$
833

 
$
18,571

2017
15,330

 
2,426

 
784

 
18,540

2016
15,234

 
1,926

 
781

 
17,941

Southern Company Gas' Revenues
Year
Gas
Distribution
Operations
 
Gas
Marketing
Services
 
All Other
 
Total
 
(in millions)
2018
$
3,155

 
$
568

 
$
186

 
$
3,909

2017
3,024

 
860

 
36

 
3,920

2016
1,266

 
354

 
32

 
1,652

Southern Company Gas
Southern Company Gas manages its business through four reportable segments - gas distribution operations, gas pipeline investments, wholesale gas services, and gas marketing services. The non-reportable segments are combined and presented as all other. During 2018, Southern Company Gas changed its reportable segments to further align the way its new Chief Operating Decision Maker reviews operating results and has reclassified prior years' data to conform to the new reportable segment presentation. This change resulted in a new reportable segment, gas pipeline investments, which was formerly included in gas midstream operations.
Gas distribution operations is the largest component of Southern Company Gas' business and includes natural gas local distribution utilities that construct, manage, and maintain intrastate natural gas pipelines and gas distribution facilities in four states. In July 2018, Southern Company Gas sold three of its natural gas distribution utilities, Elizabethtown Gas, Elkton Gas, and Florida City Gas. See Note 15 under "Southern Company Gas" for additional information.
Gas pipeline investments consists of joint ventures in natural gas pipeline investments including a 50% interest in SNG, two significant pipeline construction projects, and a 50% joint ownership interest in the Dalton Pipeline. These natural gas pipelines enable the provision of diverse sources of natural gas supplies to the customers of Southern Company Gas. See Notes 5 and 7 for additional information.
Wholesale gas services provides natural gas asset management and/or related logistics services for each of Southern Company Gas' utilities except Nicor Gas as well as for non-affiliated companies. Additionally, wholesale gas services engages in natural gas storage and gas pipeline arbitrage and related activities.
Gas marketing services provides natural gas marketing to end-use customers primarily in Georgia and Illinois through SouthStar. On June 4, 2018, Southern Company Gas sold Pivotal Home Solutions, which provided home equipment protection products and services. See Note 15 under "Southern Company Gas Sale of Pivotal Home Solutions " for additional information.
The all other column includes segments below the quantitative threshold for separate disclosure, including the storage and fuels operations, which was formerly included in gas midstream operations, and the other subsidiaries that fall below the quantitative threshold for separate disclosure.
After the Merger, Southern Company Gas changed the segment performance measure to net income, which is utilized by its parent company. In order to properly assess net income by segment, Southern Company Gas executed various intercompany note agreements to revise interest charges to its segments. Since such agreements did not exist in the predecessor period, Southern Company Gas is unable to provide the comparable net income for that period.

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Financial data for business segments for the successor years ended December 31, 2018 and 2017 , the successor period of July 1, 2016 through December 31, 2016, and the predecessor period of January 1, 2016 through June 30, 2016 were as follows:
 
Gas Distribution Operations (a)(b)
 
Gas Pipeline Investments
 
Wholesale Gas Services (c)
 
Gas Marketing Services (b)(d)
 
Total
 
All Other
 
Eliminations
 
Consolidated
 
(in millions)
Successor – Year ended December 31, 2018
 
 
 
 
 
 
 
 
 
 
Operating revenues
$
3,186

 
$
32

 
$
144

 
$
568

 
$
3,930

 
$
55

 
$
(76
)
 
$
3,909

Depreciation and
amortization
409

 
5

 
2

 
37

 
453

 
47

 

 
500

Operating income (loss)
904

 
20

 
70

 
19

 
1,013

 
(98
)
 

 
915

Earnings from equity method investments

 
145

 

 

 
145

 
3

 

 
148

Interest expense
(178
)
 
(34
)
 
(9
)
 
(6
)
 
(227
)
 
(1
)
 

 
(228
)
Income taxes (benefit)
409

 
28

 
4

 
54

 
495

 
(31
)
 

 
464

Segment net income (loss)
334

 
103

 
38

 
(40
)
 
435

 
(63
)
 

 
372

Gross property
additions
1,429

 
32

 

 
6

 
1,467

 
54

 

 
1,521

Successor – Total assets
at December 31, 2018
17,266

 
1,763

 
1,302

 
1,587

 
21,918

 
11,112

 
(11,582
)
 
21,448

Successor – Year ended December 31, 2017
 
 
 
 
 
 
 
 
 
 
Operating revenues
$
3,207

 
$
17

 
$
6

 
$
860

 
$
4,090

 
$
64

 
$
(234
)
 
$
3,920

Depreciation and
amortization
391

 
2

 
2

 
62

 
457

 
44

 

 
501

Operating income (loss)
645

 
10

 
(51
)
 
113

 
717

 
(57
)
 

 
660

Earnings from equity method
investments

 
103

 

 

 
103

 
3

 

 
106

Interest expense
(153
)
 
(26
)
 
(7
)
 
(5
)
 
(191
)
 
(9
)
 

 
(200
)
Income taxes (e)
178

 
109

 

 
24

 
311

 
56

 

 
367

Segment net income (loss) (e)
353

 
(22
)
 
(57
)
 
84

 
358

 
(115
)
 

 
243

Gross property additions
1,330

 
117

 
1

 
9

 
1,457

 
51

 

 
1,508

Successor – Total assets
at December 31, 2017
19,358

 
1,699

 
1,096

 
2,147

 
24,300

 
12,726

 
(14,039
)
 
22,987

Successor – July 1, 2016 through December 31, 2016
 
 
 
 
 
 
 
 
 
 
Operating revenues
$
1,342

 
$
3

 
$
24

 
$
354

 
$
1,723

 
$
31

 
$
(102
)
 
$
1,652

Depreciation and
 amortization
185

 

 
1

 
35

 
221

 
17

 

 
238

Operating income (loss)
225

 
1

 
(2
)
 
27

 
251

 
(52
)
 

 
199

Earnings from equity method
investments

 
58

 

 

 
58

 
2

 

 
60

Interest expense
(105
)
 
(10
)
 
(3
)
 
(1
)
 
(119
)
 
38

 

 
(81
)
Income taxes (benefit)
51

 
21

 
(3
)
 
7

 
76

 

 

 
76

Segment net income (loss)
77

 
29

 

 
19

 
125

 
(11
)
 

 
114

Gross property additions
561

 
51

 
1

 
5

 
618

 
14

 

 
632

Successor – Total assets
at December 31, 2016
19,453

 
1,659

 
1,127

 
2,084

 
24,323

 
11,697

 
(14,167
)
 
21,853


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Gas Distribution Operations (a)(b)
 
Gas Pipeline Investments
 
Wholesale Gas Services (c)
 
Gas Marketing Services (b)(d)
 
Total
 
All Other
 
Eliminations
 
Consolidated
 
(in millions)
Predecessor – January 1, 2016 through June 30, 2016
 
 
 

 
 
 
 
 

Operating revenues
$
1,575

 
$
3

 
$
(32
)
 
$
435

 
$
1,981

 
$
26

 
$
(102
)
 
$
1,905

Depreciation and
 amortization
178

 

 
1

 
11

 
190

 
16

 

 
206

Operating income (loss)
353

 
3

 
(69
)
 
109

 
396

 
(73
)
 

 
323

EBIT
353

 
3

 
(68
)
 
109

 
397

 
(69
)
 

 
328

Gross property additions
484

 
40

 
1

 
4

 
529

 
19

 

 
548

(a)
Operating revenues for the three gas distribution operations dispositions were $244 million , $399 million , and $168 million for the successor years ended December 31, 2018 and 2017 and the successor period of July 1, 2016 through December 31, 2016, respectively, and $215 million for the predecessor period ended June 30, 2016. See Note 15 under " Southern Company Gas " for additional information.
(b)
Segment net income for gas distribution operations includes a gain on dispositions of $324 million ( $16 million after tax) for the year ended December 31, 2018. Segment net income for gas marketing services includes a loss on disposition of $(33) million ( $(67) million loss after tax) and a goodwill impairment charge of $42 million for the year ended December 31, 2018 recorded in contemplation of the sale of Pivotal Home Solutions. See Note 15 under " Southern Company Gas " for additional information.
(c) The revenues for wholesale gas services are netted with costs associated with its energy and risk management activities. A reconciliation of operating revenues and intercompany revenues is shown in the following table.
 
Third Party Gross Revenues
 
Intercompany Revenues
 
Total Gross Revenues
 
Less Gross Gas Costs
 
Operating Revenues
 
(in millions)
Successor – Year Ended
December 31, 2018
$
6,955

 
$
451

 
$
7,406

 
$
7,262

 
$
144

Successor – Year Ended
December 31, 2017
6,152

 
481

 
6,633

 
6,627

 
6

Successor – July 1, 2016 through
December 31, 2016
5,807

 
333

 
6,140

 
6,116

 
24

Predecessor – January 1, 2016 through
June 30, 2016
2,500

 
143

 
2,643

 
2,675

 
(32
)
(d)
Operating revenues for the gas marketing services disposition were $55 million , $129 million , and $56 million for the successor years ended December 31, 2018 and 2017 and the successor period of July 1, 2016 through December 31, 2016, respectively, and $64 million for the predecessor period ended June 30, 2016 See Note 15 under " Southern Company Gas " for additional information.
(e)
Includes the impact of the Tax Reform Legislation and new income tax apportionment factors in several states resulting from Southern Company Gas' inclusion in the consolidated Southern Company state tax filings.

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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

17 . QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
The tables below provide summarized quarterly financial information for each registrant for 2018 and 2017 . Each registrant's business is influenced by seasonal weather conditions.
Quarter Ended
Southern Company (a)
Alabama Power
Georgia
Power (b)
Mississippi Power (c)
Southern Power (d)
Southern Company Gas (e)
 
(in millions)
March 2018
 
 
 
 
 
 
Operating Revenues
$
6,372

$
1,473

$
1,961

$
302

$
509

$
1,639

Operating Income (Loss)
1,376

372

513

7

60

388

Net Income (Loss)
936

225

352

(7
)
115

279

Net Income (Loss) Attributable to Registrant
938

225

352

(7
)
121

279

 
 
 
 
 
 
 
June 2018
 
 
 
 
 
 
Operating Revenues
$
5,627

$
1,503

$
2,048

$
297

$
555

$
730

Operating Income (Loss)
63

380

(472
)
54

16

49

Net Income (Loss)
(127
)
259

(396
)
46

45

(31
)
Net Income (Loss) Attributable to Registrant
(154
)
259

(396
)
46

22

(31
)
 
 
 
 
 
 
 
September 2018
 
 
 
 
 
 
Operating Revenues
$
6,159

$
1,740

$
2,593

$
358

$
635

$
492

Operating Income (Loss)
2,174

561

991

80

136

374

Net Income (Loss)
1,222

373

664

47

146

46

Net Income (Loss) Attributable to Registrant
1,164

373

664

47

92

46

 
 
 
 
 
 
 
December 2018
 
 
 
 
 
 
Operating Revenues
$
5,337

$
1,316

$
1,818

$
308

$
506

$
1,048

Operating Income (Loss)
578

164

257

52

30

104

Net Income (Loss)
269

73

173

149

(60
)
78

Net Income (Loss) Attributable to Registrant
278

73

173

149

(48
)
78

(a)
See notes (b), (c), (d), and (e) below.
(b)
Georgia Power recorded an estimated probable loss of $1.1 billion in the second quarter 2018 to reflect its revised estimate to complete construction and start-up of Plant Vogtle Units 3 and 4. See Note 2 under " Georgia Power Nuclear Construction " for additional information.
(c)
As a result of the abandonment and related closure activities for the mine and gasifier-related assets at the Kemper County energy facility, Mississippi Power recorded total pre-tax charges to income of $44 million ( $33 million after tax) in the first quarter 2018, immaterial amounts in the second and third quarters 2018, and a pre-tax credit to income of $9 million in the fourth quarter 2018. In addition, Mississippi Power recorded a credit to earnings of $95 million in the fourth quarter 2018 primarily resulting from the reduction of a valuation allowance for a state income tax NOL carryforward associated with the Kemper County energy facility. See Note 2 under " Mississippi Power Kemper County Energy Facility " and Note 10 for additional information.
(d)
Southern Power recorded pre-tax impairment charges of $119 million ( $89 million after tax) in the second quarter 2018 in contemplation of the sale of the Florida Plants and $36 million ( $27 million after tax) in the third quarter 2018 related to wind turbine equipment. See Note 15 under " Southern Power Sales of Natural Gas Plants " and " – Development Projects " for additional information. As a result of the Tax Reform Legislation, Southern Power recorded income tax expense of $75 million in the fourth quarter 2018. See Note 10 for additional information.
(e)
Southern Company Gas recorded a goodwill impairment charge of $42 million in the first quarter 2018 in contemplation of the sale of Pivotal Home Solutions. Southern Company Gas also recorded gains (losses) on dispositions in the second, third, and fourth quarters 2018 of $(36) million pre-tax and $(76) million after tax, $353 million pre-tax and $40 million after tax, and $(27) million pre-tax and $(15) million after tax, respectively. See Note 15 under " Southern Company Gas " for additional information.

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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

Quarter Ended
Southern
     Company (a)(b)(c)
Alabama Power
Georgia
Power
Mississippi Power (a)(b)
Southern Power (b)
Southern Company Gas (b)
 
(in millions)
March 2017
 
 
 
 
 
 
Operating Revenues
$
5,771

$
1,382

$
1,832

$
272

$
450

$
1,560

Operating Income (Loss)
1,252

361

483

(64
)
65

389

Net Income (Loss)
665

174

260

(20
)
66

239

Net Income (Loss) Attributable to Registrant
658

174

260

(20
)
70

239

 
 
 
 
 
 
 
June 2017
 
 
 
 
 
 
Operating Revenues
$
5,430

$
1,484

$
2,048

$
303

$
529

$
716

Operating Income (Loss)
(1,649
)
440

621

(2,956
)
112

95

Net Income (Loss)
(1,348
)
230

347

(2,054
)
104

49

Net Income (Loss) Attributable to Registrant
(1,381
)
230

347

(2,054
)
82

49

 
 
 
 
 
 
 
September 2017
 
 
 
 
 
 
Operating Revenues
$
6,201

$
1,740

$
2,546

$
341

$
618

$
565

Operating Income (Loss)
1,991

601

1,017

49

159

67

Net Income (Loss)
1,109

325

580

40

154

15

Net Income (Loss) Attributable to Registrant
1,069

325

580

40

124

15

 
 
 
 
 
 
 
December 2017
 
 
 
 
 
 
Operating Revenues
$
5,629

$
1,433

$
1,884

$
271

$
478

$
1,079

Operating Income (Loss)
739

255

452

(180
)
32

109

Net Income (Loss)
500

119

227

(556
)
793

(60
)
Net Income (Loss) Attributable to Registrant
496

119

227

(556
)
795

(60
)
(a)
As a result of revisions to the cost estimate for the Kemper IGCC and the project's June 2017 suspension, Mississippi Power recorded total pre-tax charges to income related to the Kemper IGCC of $108 million ( $67 million after tax) in the first quarter 2017, $3.0 billion ( $2.1 billion after tax) in the second quarter 2017, $34 million ( $21 million after tax) in the third quarter 2017, and $208 million ( $185 million after tax) in the fourth quarter 2017. See Note 2 under " Mississippi Power Kemper County Energy Facility " for additional information.
(b)
As a result of the Tax Reform Legislation, the Southern Company system recorded a total income tax benefit of $264 million in the fourth quarter 2017, comprised primarily of income tax expense of $372 million recorded at Mississippi Power, income tax benefit of $743 million recorded at Southern Power, and income tax expense of $93 million recorded at Southern Company Gas. See Note 10 for additional information.
(c)
Gulf Power recorded a pre-tax charge of $33 million ( $20 million after tax) for the write-down of its ownership in Plant Scherer Unit 3 in the first quarter 2017. See Note 2 under " Southern Company Gulf Power " for additional information.

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COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2018 Annual Report

Southern Company
The table below provides quarterly per share financial information for Southern Company common stock for 2018 and 2017 .
 
Per Common Share
 
Basic
Earnings
 
Diluted Earnings
 
 
Quarter Ended
Dividends
 
 
 
 
 
 
March 2018
$
0.93

 
$
0.92

 
$
0.5800

June 2018
(0.15
)
 
(0.15
)
 
0.6000

September 2018
1.14

 
1.13

 
0.6000

December 2018
0.27

 
0.27

 
0.6000

 
 
 
 
 
 
March 2017
$
0.66

 
$
0.66

 
$
0.5600

June 2017
(1.38
)
 
(1.37
)
 
0.5800

September 2017
1.07

 
1.06

 
0.5800

December 2017
0.49

 
0.49

 
0.5800


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Item 9.
CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE
None.
Item 9A.
CONTROLS AND PROCEDURES
Disclosure Controls and Procedures.
As of the end of the period covered by this Annual Report on Form 10-K, Southern Company, Alabama Power, Georgia Power, Mississippi Power, Southern Power, and Southern Company Gas conducted separate evaluations under the supervision and with the participation of each company's management, including the Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of the disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934, as amended). Based upon these evaluations, the Chief Executive Officer and the Chief Financial Officer, in each case, concluded that the disclosure controls and procedures are effective.
Internal Control Over Financial Reporting.
(a) Management's Annual Report on Internal Control Over Financial Reporting.
 
Page
(b) Attestation Report of the Registered Public Accounting Firm.
The report of Deloitte & Touche LLP, Southern Company's independent registered public accounting firm, regarding Southern Company's Internal Control over Financial Reporting is included in Item 8 herein of this Form 10-K. This report is not applicable to Alabama Power, Georgia Power, Mississippi Power, Southern Power, and Southern Company Gas as these companies are not accelerated filers or large accelerated filers.
(c) Changes in internal control over financial reporting.
There have been no changes in Southern Company's, Alabama Power's, Georgia Power's, Mississippi Power's, Southern Power's, or Southern Company Gas' internal control over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Securities Exchange Act of 1934, as amended) during the fourth quarter 2018 that have materially affected or are reasonably likely to materially affect Southern Company's, Alabama Power's, Georgia Power's, Mississippi Power's, Southern Power's, or Southern Company Gas' internal control over financial reporting.


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MANAGEMENT'S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING
Southern Company and Subsidiary Companies 2018 Annual Report
The management of Southern Company is responsible for establishing and maintaining an adequate system of internal control over financial reporting as required by the Sarbanes-Oxley Act of 2002 and as defined in Exchange Act Rule 13a-15(f). A control system can provide only reasonable, not absolute, assurance that the objectives of the control system are met.
Under management's supervision, an evaluation of the design and effectiveness of Southern Company's internal control over financial reporting was conducted based on the framework in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that Southern Company's internal control over financial reporting was effective as of December 31, 2018 .
Deloitte & Touche LLP, as auditors of Southern Company's financial statements, has issued an attestation report on the effectiveness of Southern Company's internal control over financial reporting as of December 31, 2018 , which is included herein.

/s/ Thomas A. Fanning
Thomas A. Fanning
Chairman, President, and Chief Executive Officer

/s/ Andrew W. Evans
Andrew W. Evans
Executive Vice President and Chief Financial Officer
February 19, 2019


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MANAGEMENT'S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING
Alabama Power Company 2018 Annual Report
The management of Alabama Power is responsible for establishing and maintaining an adequate system of internal control over financial reporting as required by the Sarbanes-Oxley Act of 2002 and as defined in Exchange Act Rule 13a-15(f). A control system can provide only reasonable, not absolute, assurance that the objectives of the control system are met.
Under management's supervision, an evaluation of the design and effectiveness of Alabama Power's internal control over financial reporting was conducted based on the framework in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that Alabama Power's internal control over financial reporting was effective as of December 31, 2018 .

/s/ Mark A. Crosswhite
Mark A. Crosswhite
Chairman, President, and Chief Executive Officer

/s/ Philip C. Raymond
Philip C. Raymond
Executive Vice President, Chief Financial Officer, and Treasurer
February 19, 2019


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MANAGEMENT'S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING
Georgia Power Company 2018 Annual Report
The management of Georgia Power is responsible for establishing and maintaining an adequate system of internal control over financial reporting as required by the Sarbanes-Oxley Act of 2002 and as defined in Exchange Act Rule 13a-15(f). A control system can provide only reasonable, not absolute, assurance that the objectives of the control system are met.
Under management's supervision, an evaluation of the design and effectiveness of Georgia Power's internal control over financial reporting was conducted based on the framework in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that Georgia Power's internal control over financial reporting was effective as of December 31, 2018 .

/s/ W. Paul Bowers
W. Paul Bowers
Chairman, President, and Chief Executive Officer

/s/ Xia Liu
Xia Liu
Executive Vice President, Chief Financial Officer, and Treasurer
February 19, 2019


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MANAGEMENT'S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING
Mississippi Power Company 2018 Annual Report
The management of Mississippi Power is responsible for establishing and maintaining an adequate system of internal control over financial reporting as required by the Sarbanes-Oxley Act of 2002 and as defined in Exchange Act Rule 13a-15(f). A control system can provide only reasonable, not absolute, assurance that the objectives of the control system are met.
Under management's supervision, an evaluation of the design and effectiveness of Mississippi Power's internal control over financial reporting was conducted based on the framework in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that Mississippi Power's internal control over financial reporting was effective as of December 31, 2018 .

/s/ Anthony L. Wilson
Anthony L. Wilson
Chairman, President, and Chief Executive Officer

/s/ Moses H. Feagin
Moses H. Feagin
Vice President, Chief Financial Officer, and Treasurer
February 19, 2019


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MANAGEMENT'S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING
Southern Power Company and Subsidiary Companies 2018 Annual Report
The management of Southern Power is responsible for establishing and maintaining an adequate system of internal control over financial reporting as required by the Sarbanes-Oxley Act of 2002 and as defined in Exchange Act Rule 13a-15(f). A control system can provide only reasonable, not absolute, assurance that the objectives of the control system are met.
Under management's supervision, an evaluation of the design and effectiveness of Southern Power's internal control over financial reporting was conducted based on the framework in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that Southern Power's internal control over financial reporting was effective as of December 31, 2018 .

/s/ Mark S. Lantrip
Mark S. Lantrip
Chairman, President, and Chief Executive Officer

/s/ William C. Grantham
William C. Grantham
Senior Vice President, Chief Financial Officer, and Treasurer
February 19, 2019


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MANAGEMENT'S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING
Southern Company Gas and Subsidiary Companies 2018 Annual Report
The management of Southern Company Gas is responsible for establishing and maintaining an adequate system of internal control over financial reporting as required by the Sarbanes-Oxley Act of 2002 and as defined in Exchange Act Rule 13a-15(f). A control system can provide only reasonable, not absolute, assurance that the objectives of the control system are met.
Under management's supervision, an evaluation of the design and effectiveness of Southern Company Gas' internal control over financial reporting was conducted based on the framework in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that Southern Company Gas' internal control over financial reporting was effective as of December 31, 2018 .

/s/ Kimberly S. Greene
Kimberly S. Greene
Chairman, President, and Chief Executive Officer

/s/ Daniel S. Tucker
Daniel S. Tucker
Executive Vice President, Chief Financial Officer, and Treasurer
February 19, 2019

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Item 9B.
OTHER INFORMATION
Georgia Power is disclosing the information below in this Item 9B in lieu of filing a Current Report on Form 8-K.
Amendments to the Vogtle Joint Ownership Agreements
As previously reported, on September 26, 2018, Georgia Power entered into a binding term sheet with the other Vogtle Owners and MEAG's wholly-owned subsidiaries MEAG Power SPVJ, LLC (MEAG SPVJ), MEAG Power SPVM, LLC (MEAG SPVM), and MEAG Power SPVP, LLC (MEAG SPVP) to take certain actions which partially mitigate potential financial exposure for the other Vogtle Owners (Vogtle Owner Term Sheet).
On February 18, 2019, Georgia Power, the other Vogtle Owners, MEAG SPVJ, MEAG SPVM, and MEAG SPVP entered into certain amendments to the joint ownership agreements for Plant Vogtle Units 3 and 4 (Vogtle Joint Ownership Agreements) to implement the provisions of the Vogtle Owner Term Sheet (Global Amendments).
Pursuant to the Global Amendments, and consistent with the Vogtle Owner Term Sheet, the Vogtle Joint Ownership Agreements were modified as follows: (i) each Vogtle Owner must pay its proportionate share of qualifying construction costs for Plant Vogtle Units 3 and 4 based on its ownership percentage up to the estimated cost at completion (EAC) for Plant Vogtle Units 3 and 4 which formed the basis of Georgia Power's forecast of $8.4 billion in the nineteenth VCM plus $800 million; (ii) Georgia Power will be responsible for 55.7% of actual qualifying construction costs between $800 million and $1.6 billion over the EAC in the nineteenth VCM (resulting in $80 million of potential additional costs to Georgia Power), with the remaining Vogtle Owners responsible for 44.3% of such costs pro rata in accordance with their respective ownership interests; and (iii) Georgia Power will be responsible for 65.7% of qualifying construction costs between $1.6 billion and $2.1 billion over the EAC in the nineteenth VCM (resulting in a further $100 million of potential additional costs to Georgia Power), with the remaining Vogtle Owners responsible for 34.3% of such costs pro rata in accordance with their respective ownership interests.
If the EAC is revised and exceeds the EAC in the nineteenth VCM by more than $2.1 billion, each of the other Vogtle Owners will have a one-time option at the time the project budget forecast is so revised to tender a portion of its ownership interest to Georgia Power in exchange for Georgia Power's agreement to pay 100% of such Vogtle Owner's remaining share of total construction costs in excess of the EAC in the nineteenth VCM plus $2.1 billion. In this event, Georgia Power will have the option of cancelling the project in lieu of purchasing a portion of the ownership interest of any other Vogtle Owner. If Georgia Power accepts the offer to purchase a portion of another Vogtle Owner's ownership interest in Plant Vogtle Units 3 and 4, the ownership interest(s) to be conveyed from the tendering Vogtle Owner(s) to Georgia Power will be calculated based on the proportion of the cumulative amount of construction costs paid by each such tendering Vogtle Owner(s) and by Georgia Power as of the COD of Plant Vogtle Unit 4. For purposes of this calculation, payments made by Georgia Power on behalf of another Vogtle Owner in accordance with the second and third items described in the paragraph above will be treated as payments made by the applicable Vogtle Owner.
In the event the actual costs of construction at completion of a Unit are less than the EAC reflected in the nineteenth VCM report and such Unit is placed in service in accordance with the schedule projected in the nineteenth VCM report (i.e., Plant Vogtle Unit 3 is placed in service by November 2021 or Plant Vogtle Unit 4 is placed in service by November 2022), Georgia Power will be entitled to 60.7% of the cost savings with respect to the relevant Unit and the remaining Vogtle Owners will be entitled to 39.3% of such savings on a pro rata basis in accordance with their respective ownership interests.
For purposes of the foregoing provisions, qualifying construction costs will not include costs (i) resulting from force majeure events, including governmental actions or inactions (or significant delays associated with issuance of such actions) that affect the licensing, completion, start-up, operations, or financing of Plant Vogtle Units 3 and 4, administrative proceedings or litigation regarding ITAAC or other regulatory challenges to commencement of operation of Plant Vogtle Units 3 and 4, and changes in laws or regulations governing Plant Vogtle Units 3 and 4, (ii) legal fees and legal expenses incurred due to litigation with contractors or subcontractors that are not subsidiaries or affiliates of Southern Company, and (iii) additional costs caused by requests from the Vogtle Owners other than Georgia Power, except for the exercise of a right to vote granted under the Vogtle Joint Ownership Agreements, that increase costs by $100,000 or more.
Pursuant to the Global Amendments, and consistent with the Vogtle Owner Term Sheet, the provisions of the Vogtle Joint Ownership Agreements requiring that Vogtle Owners holding 90% of the ownership interests in Plant Vogtle Units 3 and 4 vote to continue construction following certain adverse events (Project Adverse Events) were also modified. In particular, an increase in the construction cost estimate for Plant Vogtle Units 3 and 4 no longer constitutes a Project Adverse Event and thus would no longer require a vote. In addition, the Project Adverse Event relating to disallowances of cost recovery by Georgia Power now excludes any additional amounts paid by Georgia Power on behalf of the other Vogtle Owners pursuant to the provisions of the Global Amendments described above and the first 6% of costs during any six-month VCM reporting period that are disallowed by the Georgia PSC for recovery, or for which Georgia Power elects not to seek cost recovery, through retail rates. Further, the Global Amendments provide that Georgia Power may cancel the project at any time in its sole discretion.

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The Global Amendments provide that if the holders of at least 90% of the ownership interests fail to vote in favor of continuing the project following any future Project Adverse Event, work on Plant Vogtle Units 3 and 4 will continue for a period of 30 days if the holders of more than 50% of the ownership interests vote in favor of continuing construction (Majority Voting Owners). In such a case, the Vogtle Owners (i) have agreed to negotiate in good faith towards the resumption of the project, (ii) if no agreement is reached during such 30-day period, the project will be cancelled, and (iii) in the event of such a cancellation, the Majority Voting Owners will be obligated to reimburse any other Vogtle Owner for the incremental costs it incurred during such 30-day negotiation period.
Purchase of PTCs During Commercial Operation
Pursuant to the Global Amendments, and consistent with the Vogtle Owner Term Sheet, Georgia Power has agreed to purchase additional PTCs from OPC, Dalton, MEAG SPVM, MEAG SPVP, and MEAG SPVJ (to the extent any MEAG SPVJ PTC rights remain after any purchases required under Georgia Power's agreement with MEAG and MEAG SPVJ to provide funding with respect to MEAG SPVJ's ownership interest in Plant Vogtle Units 3 and 4 under certain circumstances) at varying purchase prices dependent upon the actual cost to complete construction of Plant Vogtle Units 3 and 4 as compared to the EAC reflected in the nineteenth VCM report. The purchases are at the option of the applicable Vogtle Owner. The purchases will occur during the month after such PTCs are earned and will be at the following purchase prices: (i) 88% of face value if the actual cost remains at or below the EAC projected in the nineteenth VCM report; (ii) 91% of face value if the actual cost increases by no more than $299 million over the EAC projected in the nineteenth VCM report; (iii) 95% of face value if the actual cost increases at least $300 million but less than $600 million over the EAC in the nineteenth VCM report; and (iv) 98% of face value if the actual cost increases by $600 million or more over the EAC in the nineteenth VCM report.

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PART III
Items 10 (other than the information under "Code of Ethics" below), 11, 12, 13, and 14 for Southern Company are incorporated by reference to Southern Company's Definitive Proxy Statement relating to the 2019 Annual Meeting of Stockholders. Specifically, reference is made to "Corporate Governance at Southern Company" and "Section 16(a) Beneficial Ownership Reporting Compliance" for Item 10, "Compensation Discussion and Analysis," "Executive Compensation Tables," and "Director Compensation" for Item 11, "Stock Ownership Information," "Executive Compensation Tables," and "Equity Compensation Plan Information" for Item 12, "Southern Company Board" for Item 13, and "Principal Independent Registered Public Accounting Firm Fees" for Item 14.
Items 10 (other than the information under "Code of Ethics" below), 11, 12, 13, and 14 for Alabama Power are incorporated by reference to the Definitive Information Statement of Alabama Power relating to its 2019 Annual Meeting of Shareholders. Specifically, reference is made to "Nominees for Election as Directors," "Corporate Governance," and "Section 16(a) Beneficial Ownership Reporting Compliance" for Item 10, "Executive Compensation," "Compensation Committee Interlocks and Insider Participation," "Director Compensation," "Director Deferred Compensation Plan," and "Director Compensation Table" for Item 11, "Stock Ownership Table" and "Executive Compensation" for Item 12, "Certain Relationships and Related Transactions" and "Director Independence" for Item 13, and "Principal Independent Registered Public Accounting Firm Fees" for Item 14.
Items 10, 11, 12, and 13 for each of Georgia Power, Mississippi Power, Southern Power, and Southern Company Gas are omitted pursuant to General Instruction I(2)(c) of Form 10-K. Item 14 for each of Georgia Power, Mississippi Power, Southern Power, and Southern Company Gas is contained herein.
ITEM 10.
DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE
Code of Ethics
The registrants collectively have adopted a code of business conduct and ethics (Code of Ethics) that applies to each director, officer, and employee of the registrants and their subsidiaries. The Code of Ethics can be found on Southern Company's website located at www.southerncompany.com . The Code of Ethics is also available free of charge in print to any shareholder by requesting a copy from Myra C. Bierria, Corporate Secretary, Southern Company, 30 Ivan Allen Jr. Boulevard NW, Atlanta, Georgia 30308. Any amendment to or waiver from the Code of Ethics that applies to executive officers and directors will be posted on the website.


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     Table of Contents                                  Index to Financial Statements

ITEM 14.
PRINCIPAL ACCOUNTANT FEES AND SERVICES
The following represents fees billed to Georgia Power, Mississippi Power, Southern Power, and Southern Company Gas in 2018 and 2017 by Deloitte & Touche LLP, each company's principal public accountant:
 
2018
 
2017
 
(in thousands)
Georgia Power
 
 
 
Audit Fees  (1)
$
3,605

 
$
3,247

Audit-Related Fees (2)
31

 
96

Tax Fees

 

All Other Fees (3)
8

 
1

Total
$
3,644

 
$
3,344

Mississippi Power
 
 
 
Audit Fees  (1)
$
1,371

 
$
1,537

Audit-Related Fees (2)
79

 
6

Tax Fees

 

All Other Fees (3)

 
8

Total
$
1,450

 
$
1,551

Southern Power
 
 
 
Audit Fees  (1)
$
1,795

 
$
1,778

Audit-Related Fees (4)
1,017

 
439

Tax Fees

 

All Other Fees  (3)
13

 
8

Total
$
2,825

 
$
2,225

Southern Company Gas
 
 
 
Audit Fees  (1)(5)
$
3,622

 
$
4,449

Audit-Related Fees (6)
520

 
579

Tax Fees

 

All Other Fees (3)(7)
7

 
8

Total
$
4,149

 
$
5,036

(1)
Includes services performed in connection with financing transactions.
(2)
Represents non-statutory audit services in 2018 and 2017.
(3)
Represents registration fees for attendance at Deloitte & Touche LLP-sponsored education seminars.
(4)
Represents fees in connection with audits of Southern Power partnerships.
(5)
Includes fees in connection with statutory audits of several Southern Company Gas subsidiaries.
(6)
Represents fees for non-statutory audit services in 2018 and a review report on internal controls in 2018 and 2017.
(7)
Includes subscription fees for Deloitte & Touche LLP's technical accounting research tool in 2017.
The Southern Company Audit Committee (on behalf of Southern Company and its subsidiaries) adopted a Policy of Engagement of the Independent Auditor for Audit and Non-Audit Services that includes pre-approval requirements for the audit and non-audit services provided by Deloitte & Touche LLP. All of the services provided by Deloitte & Touche LLP in fiscal years 2018 and 2017 and related fees were approved in advance by the Southern Company Audit Committee.

III-2

     Table of Contents                                  Index to Financial Statements

PART IV
Item 15.
EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
(a)
The following documents are filed as a part of this report on Form 10-K:
(1)
Financial Statements and Financial Statement Schedules:
Management's Reports on Internal Control Over Financial Reporting for Southern Company and Subsidiary Companies, Alabama Power, Georgia Power, Mississippi Power, Southern Power and Subsidiary Companies, and Southern Company Gas and Subsidiary Companies are listed under Item 9A herein.
Reports of Independent Registered Public Accounting Firm on the financial statements for Southern Company and Subsidiary Companies, Alabama Power Company, Georgia Power Company, Mississippi Power Company, Southern Power Company and Subsidiary Companies, and Southern Company Gas and Subsidiary Companies are listed under Item 8 herein.
The financial statements filed as a part of this report for Southern Company and Subsidiary Companies, Alabama Power, Georgia Power, Mississippi Power, Southern Power and Subsidiary Companies, and Southern Company Gas and Subsidiary Companies are listed under Item 8 herein.
Reports of Independent Registered Public Accounting Firm on the financial statement schedules for Southern Company and Subsidiary Companies, Alabama Power Company, Georgia Power Company, Mississippi Power Company, Southern Power Company and Subsidiary Companies, and Southern Company Gas and Subsidiary Companies are listed in the Index to the Financial Statement Schedules at page S-1.
The financial statement schedules for Southern Company and Subsidiary Companies, Alabama Power, Georgia Power, Mississippi Power, Southern Power and Subsidiary Companies, and Southern Company Gas and Subsidiary Companies are listed in the Index to the Financial Statement Schedules at page S-1.
The financial statements of Southern Natural Gas Company, L.L.C. as of December 31, 2018 and 2017 and for the years ended December 31, 2018 and 2017 and the four months ended December 31, 2016 are provided by Southern Company Gas as separate financial statements of subsidiaries not consolidated pursuant to Rule 3-09 of Regulation S-X, and are incorporated by reference herein from Exhibit 99(g) hereto.
(2)
Exhibits:
Exhibits for Southern Company, Alabama Power, Georgia Power, Mississippi Power, Southern Power, and Southern Company Gas are listed in the Exhibit Index at page E-1.

Item 16. FORM 10-K SUMMARY

None.



IV-1

     Table of Contents                                  Index to Financial Statements

INDEX TO FINANCIAL STATEMENT SCHEDULES
 
 
 
Page
Schedule II
 
Valuation and Qualifying Accounts and Reserves 2018, 2017, and 2016
 
Schedules I through V not listed above are omitted as not applicable or not required. Columns omitted from schedules filed have been omitted because the information is not applicable or not required.

S-1

     Table of Contents                                  Index to Financial Statements

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholders and the Board of Directors of The Southern Company and Subsidiary Companies
Opinion on the Financial Statement Schedule
We have audited the consolidated financial statements of The Southern Company and subsidiary companies (Southern Company) as of December 31, 2018 and 2017 , and for each of the three years in the period ended December 31, 2018 , and Southern Company's internal control over financial reporting as of December 31, 2018 , and have issued our report thereon dated February 19, 2019 ; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of Southern Company (Page S-8) listed in the Index at Item 15. This financial statement schedule is the responsibility of Southern Company's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2019


S-2

     Table of Contents                                  Index to Financial Statements

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholders and the Board of Directors of Alabama Power Company
Opinion on the Financial Statement Schedule
We have audited the financial statements of Alabama Power Company (Alabama Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2018 and 2017 , and for each of the three years in the period ended December 31, 2018 , and have issued our report thereon dated February 19, 2019 ; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of Alabama Power (Page S-9) listed in the Index at Item 15. This financial statement schedule is the responsibility of Alabama Power's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Birmingham, Alabama
February 19, 2019


S-3

     Table of Contents                                  Index to Financial Statements

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Georgia Power Company
Opinion on the Financial Statement Schedule
We have audited the financial statements of Georgia Power Company (Georgia Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2018 and 2017 , and for each of the three years in the period ended December 31, 2018 , and have issued our report thereon dated February 19, 2019 ; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of Georgia Power (Page S-10) listed in the Index at Item 15. This financial statement schedule is the responsibility of Georgia Power's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2019


S-4

     Table of Contents                                  Index to Financial Statements

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholders and the Board of Directors of Mississippi Power Company
Opinion on the Financial Statement Schedule
We have audited the financial statements of Mississippi Power Company (Mississippi Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2018 and 2017 , and for each of the three years in the period ended December 31, 2018 , and have issued our report thereon dated February 19, 2019 ; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of Mississippi Power (Page S-11) listed in the Index at Item 15. This financial statement schedule is the responsibility of Mississippi Power's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2019



S-5

     Table of Contents                                  Index to Financial Statements

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Southern Power Company and Subsidiary Companies
Opinion on the Financial Statement Schedule
We have audited the consolidated financial statements of Southern Power Company and subsidiary companies (Southern Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2018 and 2017 , and for each of the three years in the period ended December 31, 2018 , and have issued our report thereon dated February 19, 2019 ; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of Southern Power (Page S-12) listed in the Index at Item 15. This financial statement schedule is the responsibility of Southern Power's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2019


S-6

     Table of Contents                                  Index to Financial Statements

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Southern Company Gas and Subsidiary Companies
Opinion on the Financial Statement Schedule
We have audited the consolidated financial statements of Southern Company Gas and subsidiary companies (Southern Company Gas) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2018 and 2017 , and the six-month periods ended June 30, 2016 (Predecessor) and December 31, 2016 (Successor), and have issued our report thereon dated February 19, 2019 ; such report is included elsewhere in this Form 10-K. As indicated in that report, we did not audit the financial statements of Southern Natural Gas Company, L.L.C. (SNG), Southern Company Gas' investment in which is accounted for by the use of the equity method. Southern Company Gas' financial statements include its equity investment in SNG of $1,261 million and $1,262 million as of December 31, 2018 and December 31, 2017 , respectively, and its earnings from its equity method investment in SNG of $131 million , $88 million , and $56 million for the years ended December 31, 2018 and 2017 and the six months ended December 31, 2016, respectively. Those statements were audited by other auditors whose report (which expresses an unqualified opinion on SNG's financial statements and contains an emphasis of matter paragraph concerning the extent of its operations and relationships with affiliated entities) have been furnished to us, and our opinion, insofar as it relates to the amounts included for SNG, is based solely on the report of the other auditors. Our audits also included the financial statement schedule of Southern Company Gas (Page S-13) listed in the Index at Item 15. This financial statement schedule is the responsibility of Southern Company Gas' management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2019


S-7

     Table of Contents                                  Index to Financial Statements

THE SOUTHERN COMPANY AND SUBSIDIARY COMPANIES
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
FOR THE YEARS ENDED DECEMBER 31, 2018 , 2017 , AND 2016
(Stated in Millions of Dollars)
 
 
 
Additions
 
 
 
 
 
 
Description
Balance at Beginning of Period
 
Charged to Income
 
Charged to Other Accounts
 
Acquisitions
 
Deductions
 
Reclassified to Held for Sale (c)
 
Balance at End of Period
Provision for uncollectible accounts (a)
 
 
 
 
 
 
 
 
 
 
 
 
 
2018
$
44

 
$
69

 
$
(1
)
 
$

 
$
61

 
$
1

 
$
50

2017
43

 
56

 

 

 
55

 

 
44

2016
13

 
40

 
(1
)
 
41

 
50

 

 
43

Tax valuation allowance (net state) (b)
 
 
 
 
 
 
 
 
 
 
 
 
 
2018
$
148

 
$
(38
)
 
$

 
$

 
$
10

 
$

 
$
100

2017
22

 
126

 

 

 

 

 
148

2016
2

 

 

 
20

 

 

 
22

(a)
Deductions represent write-offs of accounts considered to be uncollectible, less recoveries of amounts previously written off.
(b)
In 2017, Mississippi Power established a valuation allowance for the State of Mississippi net operating loss carryforward expected to expire prior to being fully utilized. This valuation allowance was reduced in 2018 as a result of higher projected state taxable income. In 2018, Georgia Power established a valuation allowance for certain Georgia state tax credits expected to expire prior to being fully utilized, as a result of lower projected state taxable income. See Note 10 to the financial statements in Item 8 herein for additional information.
(c)
Represents provision for uncollectible accounts at Gulf Power presented on Southern Company's balance sheet at December 31, 2018 as assets held for sale, current. See Note 15 to the financial statements under " Southern Company's Sale of Gulf Power " and " Assets Held for Sale " in Item 8 herein for additional information.

S-8

     Table of Contents                                  Index to Financial Statements

ALABAMA POWER COMPANY
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
FOR THE YEARS ENDED DECEMBER 31, 2018 , 2017 , AND 2016
(Stated in Millions of Dollars)
 
 
 
Additions
 
 
 
 
Description
Balance at Beginning
of Period
 
Charged to
Income
 
Charged to Other Accounts
 
Deductions (*)
 
Balance at
End of Period
Provision for uncollectible accounts
 
 
 
 
 
 
 
 
 
2018
$
9

 
$
13

 
$

 
$
12

 
$
10

2017
10

 
10

 

 
11

 
9

2016
10

 
11

 

 
11

 
10

(*)
Deductions represent write-offs of accounts considered to be uncollectible, less recoveries of amounts previously written off.

S-9

     Table of Contents                                  Index to Financial Statements

GEORGIA POWER COMPANY
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
FOR THE YEARS ENDED DECEMBER 31, 2018 , 2017 , AND 2016
(Stated in Millions of Dollars)
 
 
 
Additions
 
 
 
 
Description
Balance at Beginning
of Period
 
Charged to
Income
 
Charged to Other
Accounts
 
Deductions
 
Balance at End of Period
Provision for uncollectible accounts (a)
 
 
 
 
 
 
 
 
 
2018
$
3

 
$
11

 
$

 
$
12

 
$
2

2017
3

 
11

 

 
11

 
3

2016
2

 
15

 

 
14

 
3

Tax valuation allowance (net state) (b)
 
 
 
 
 
 
 
 
 
2018
$

 
$
39

 
$

 
$
6

 
$
33

2017

 

 

 

 

2016

 

 

 

 

(a)
Deductions represent write-offs of accounts considered to be uncollectible, less recoveries of amounts previously written off.
(b)
In 2018, Georgia Power established a valuation allowance for certain Georgia state tax credits expected to expire prior to being fully utilized, as a result of lower projected state taxable income. See Note 10 to the financial statements in Item 8 herein for additional information.


S-10

     Table of Contents                                  Index to Financial Statements

MISSISSIPPI POWER COMPANY
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
FOR THE YEARS ENDED DECEMBER 31, 2018 , 2017 , AND 2016
(Stated in Millions of Dollars)
 
 
 
Additions
 
 
 
 
Description
Balance at Beginning
of Period
 
Charged to
Income
 
Charged to Other
Accounts
 
Deductions
 
Balance at End of Period
Provision for uncollectible accounts (a)
 
 
 
 
 
 
 
 
 
2018
$
1

 
$
1

 
$

 
$
1

 
$
1

2017

 
2

 

 
1

 
1

2016

 
1

 

 
1

 

Tax valuation allowance (net state) (b)
 
 
 
 
 
 
 
 
 
2018
$
124

 
$
(92
)
 
$

 
$

 
$
32

2017

 
124

 

 

 
124

2016

 

 

 

 

(a)
Deductions represent write-offs of accounts considered to be uncollectible, less recoveries of amounts previously written off.
(b)
In 2017, Mississippi Power established a valuation allowance for the State of Mississippi net operating loss carryforward expected to expire prior to being fully utilized. This valuation allowance was reduced in 2018 as a result of higher projected state taxable income. See Note 10 to the financial statements in Item 8 herein for additional information.

S-11

     Table of Contents                                  Index to Financial Statements

SOUTHERN POWER COMPANY AND SUBSIDIARY COMPANIES
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
FOR THE YEARS ENDED DECEMBER 31, 2018 , 2017 , AND 2016
(Stated in Millions of Dollars)
 
 
 
Additions
 
 
 
 
Description
Balance at Beginning
of Period
 
Charged to
Income
 
Charged to Other
Accounts
 
Deductions
 
Balance at End of Period
Tax valuation allowance (net state)
 
 
 
 
 
 
 
 
 
2018
$
10

 
$
12

 
$

 
$

 
$
22

2017

 
10

 

 

 
10

2016

 

 

 

 




S-12

     Table of Contents                                  Index to Financial Statements

SOUTHERN COMPANY GAS AND SUBSIDIARY COMPANIES
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
FOR THE SUCCESSOR PERIODS OF JULY 1, 2016 THROUGH DECEMBER 31, 2016
AND THE YEARS ENDED DECEMBER 31, 2018 AND 2017
AND THE PREDECESSOR PERIOD OF JANUARY 1, 2016 THROUGH JUNE 30, 2016
(Stated in Millions of Dollars)
 
 
 
Additions
 
 
 
 
Description
Balance at Beginning
of Period
 
Charged to
Income
 
Charged to Other Accounts
 
Deductions
 
Balance at
End of Period
Successor – December 31, 2018
 
 
 
 
 
 
 
 
 
Provision for uncollectible accounts (*)
$
28

 
$
33

 
$
(1
)
 
$
30

 
$
30

Income tax valuation allowance (net state)
11

 
1

 

 

 
12

Successor – December 31, 2017
 
 
 
 
 
 
 
 
 
Provision for uncollectible accounts (*)
$
27

 
$
28

 
$

 
$
27

 
$
28

Income tax valuation allowance (net state)
19

 

 

 
8

 
11

Successor – December 31, 2016
 
 
 
 
 
 
 
 
 
Provision for uncollectible accounts (*)
$
38

 
$
9

 
$
(1
)
 
$
19

 
$
27

Income tax valuation allowance (net state)
19

 

 

 

 
19

Predecessor – June 30, 2016
 
 
 
 
 
 
 
 
 
Provision for uncollectible accounts (*)
$
29

 
$
16

 
$
2

 
$
9

 
$
38

Income tax valuation allowance (net state)
19

 

 

 

 
19

(*)
Deductions represent write-offs of accounts considered to be uncollectible, less recoveries of amounts previously written off.


S-13

     Table of Contents                                  Index to Financial Statements

EXHIBIT INDEX
The exhibits below with an asterisk (*) preceding the exhibit number are filed herewith. The remaining exhibits have previously been filed with the SEC and are incorporated herein by reference. The exhibits marked with a pound sign (#) are management contracts or compensatory plans or arrangements required to be identified as such by Item 15 of Form 10-K.
(2)
 
Plan of acquisition, reorganization, arrangement, liquidation or succession
 
 
Southern Company
 
 
 
(a)
 
1
 
 
Agreement and Plan of Merger by and among Southern Company, AMS Corp., and Southern Company Gas, dated August 23, 2015. (Designated in Form 8-K dated August 23, 2015, File No. 1-3526, as Exhibit 2.1.)
 
 
 
(a)
 
2
 
 
Stock Purchase Agreement, dated as of May 20, 2018, by and among Southern Company, 700 Universe, LLC, and NextEra Energy. (Designated in Form 8-K dated May 23, 2018, File No. 1-3526, as Exhibit 2(a)1.)
 
 
*
(a)
 
3
 
 
 
 
 
(a)
 
4
 
 
Stock Purchase Agreement, dated as of May 20, 2018, by and among Southern Company Gas, NUI Corporation, 700 Universe, LLC, and NextEra Energy. (Designated in Form 8-K dated May 23, 2018, File No. 1-3526, as Exhibit 2(a)2.)
 
 
 
(a)
 
5
 
 
Equity Interest Purchase Agreement, dated as of May 20, 2018, by and among Southern Power Company, 700 Universe, LLC, and NextEra Energy. (Designated in Form 8-K dated May 23, 2018, File No. 1-3526, as Exhibit 2(a)3.)
 
 
Southern Power
 
 
 
(e)
 
1
 
 
Equity Interest Purchase Agreement, dated as of May 20, 2018, by and among Southern Power Company, 700 Universe, LLC, and NextEra Energy. See Exhibit 2(a)5 herein.
 
 
Southern Company Gas
 
 
 
(f)
 
1
 
 
Agreement and Plan of Merger by and among Southern Company, AMS Corp., and Southern Company Gas, dated August 23, 2015. See Exhibit 2(a)1 herein.
 
 
 
(f)
 
2
 
 
Purchase and Sale Agreement, dated as of July 10, 2016, among Kinder Morgan SNG Operator LLC, Southern Natural Gas Company, L.L.C., and Southern Company. (Designated in Form 8-K dated August 31, 2016, File No. 1-14174, as Exhibit 2.1a.)
 
 
 
(f)
 
3
 
 
Assignment, Assumption and Novation of Purchase and Sale Agreement, dated as of August 31, 2016, between Southern Company and Evergreen Enterprise Holdings LLC. (Designated in Form 8-K dated August 31, 2016, File No. 1-14174, as Exhibit 2.1b.)
 
 
 
 
 
 
 
 
 
 
(3)
 
Articles of Incorporation and By-Laws
 
 
Southern Company
 
 
*
(a)
 
1
 
 
 
 
 
(a)
 
2
 
 
By-laws of Southern Company as amended effective May 25, 2016, and as presently in effect. (Designated in Form 8-K dated May 25, 2016, File No. 1-3526, as Exhibit 3.2 .)
 
 
Alabama Power
 
 
 
(b)
 
1
 
 
Charter of Alabama Power and amendments thereto through September 7, 2017. (Designated in Registration Nos. 2-59634 as Exhibit 2(b), 2-60209 as Exhibit 2(c), 2-60484 as Exhibit 2(b), 2-70838 as Exhibit 4(a)-2, 2-85987 as Exhibit 4(a)-2, 33-25539 as Exhibit 4(a)-2, 33-43917 as Exhibit 4(a)-2, in Form 8-K dated February 5, 1992, File No. 1-3164, as Exhibit 4(b)-3, in Form 8-K dated July 8, 1992, File No. 1-3164, as Exhibit 4(b)-3, in Form 8-K dated October 27, 1993, File No. 1-3164, as Exhibits 4(a) and 4(b), in Form 8-K dated November 16, 1993, File No. 1-3164, as Exhibit 4(a), in Certificate of Notification, File No. 70-8191, as Exhibit A, in Form 10-K for the year ended December 31, 1997, File No. 1-3164, as Exhibit 3(b)2 , in Form 8-K dated August 10, 1998, File No. 1-3164, as Exhibit 4.4 , in Form 10-K for the year ended December 31, 2000, File No. 1-3164, as Exhibit 3(b)2 , in Form 10-K for the year ended December 31, 2001, File No. 1-3164, as Exhibit 3(b)2 , in Form 8-K dated February 5, 2003, File No. 1-3164, as Exhibit 4.4 , in Form 10-Q for the quarter ended March 31, 2003, File No 1-3164, as Exhibit 3(b)1 , in Form 8-K dated February 5, 2004, File No. 1-3164, as Exhibit 4.4 , in Form 10-Q for the quarter ended March 31, 2006, File No. 1-3164, as Exhibit 3(b)(1) , in Form 8-K dated December 5, 2006, File No. 1-3164, as Exhibit 4.2,  in Form 8-K dated September 12, 2007, File No. 1-3164, as Exhibit 4.5 , in Form 8-K dated October 17, 2007, File No. 1-3164, as Exhibit 4.5 , in Form 10-Q for the quarter ended March 31, 2008, File No. 1-3164, as Exhibit 3(b)1 , and in Form 8-K dated September 5, 2017, File No. 1-3164, as Exhibit 4.1 .)

E-1

     Table of Contents                                  Index to Financial Statements

 
 
 
(b)
 
2
 
 
Amended and Restated By-laws of Alabama Power effective February 10, 2014, and as presently in effect. ( Designated in Form 8-K dated February 10, 2014, File No 1-3164, as Exhibit 3.1. )
 
 
Georgia Power
 
 
 
(c)
 
1
 
 
Charter of Georgia Power and amendments thereto through October 9, 2007. (Designated in Registration Nos. 2-63392 as Exhibit 2(a)-2, 2-78913 as Exhibits 4(a)-(2) and 4(a)-(3), 2-93039 as Exhibit 4(a)-(2), 2-96810 as Exhibit 4(a)-2, 33-141 as Exhibit 4(a)-(2), 33-1359 as Exhibit 4(a)(2), 33-5405 as Exhibit 4(b)(2), 33-14367 as Exhibits 4(b)-(2) and 4(b)-(3), 33-22504 as Exhibits 4(b)-(2), 4(b)-(3) and 4(b)-(4), in Form 10-K for the year ended December 31, 1991, File No. 1-6468, as Exhibits 4(a)(2) and 4(a)(3), in Registration No. 33-48895 as Exhibits 4(b)-(2) and 4(b)-(3), in Form 8-K dated December 10, 1992, File No. 1-6468 as Exhibit 4(b), in Form 8-K dated June 17, 1993, File No. 1-6468, as Exhibit 4(b), in Form 8-K dated October 20, 1993, File No. 1-6468, as Exhibit 4(b), in  Form 10-K for the year ended December 31, 1997, File No. 1-6468, as Exhibit 3(c)2 , in Form 10-K for the year ended December 31, 2000, File No. 1-6468, as Exhibit 3(c)2 , in Form 8-K dated June 27, 2006, File No. 1-6468, as Exhibit 3.1 , and in Form 8-K dated October 3, 2007, File No. 1-6468, as Exhibit 4.5 .)
 
 
 
(c)
 
2
 
 
By-laws of Georgia Power as amended effective November 9, 2016, and as presently in effect.  (Designated in Form 8-K dated November 9, 2016, File No. 1-6468, as Exhibit 3.1.)
 
 
Mississippi Power
 
 
 
(d)
 
1
 
 
Articles of Incorporation of Mississippi Power, articles of merger of Mississippi Power Company (a Maine corporation) into Mississippi Power and articles of amendment to the articles of incorporation of Mississippi Power through April 2, 2004. (Designated in Registration No. 2-71540 as Exhibit 4(a)-1, in Form U5S for 1987, File No. 30-222-2, as Exhibit B-10, in Registration No. 33-49320 as Exhibit 4(b)-(1), in Form 8-K dated August 5, 1992, File No. 001-11229, as Exhibits 4(b)-2 and 4(b)-3, in Form 8-K dated August 4, 1993, File No. 001-11229, as Exhibit 4(b)-3, in Form 8-K dated August 18, 1993, File No. 001-11229, as Exhibit 4(b)-3, in Form 10-K for the year ended December 31, 1997, File No. 001-11229, as Exhibit 3(e)2,  in Form 10-K for the year ended December 31, 2000, File No. 001-11229, as Exhibit 3(e)2,  and in Form 8-K dated March 3, 2004, File No. 001-11229, as Exhibit 4.6 .)
 
 
 
(d)
 
2
 
 
By-laws of Mississippi Power as amended effective July 1, 2017, and as presently in effect. (Designated in Form 10-Q for the quarter ended March 31, 2017, File No. 001-11229, as Exhibit 3(e).)
 
 
Southern Power
 
 
 
(e)
 
1
 
 
Certificate of Incorporation of Southern Power Company dated January 8, 2001. (Designated in Registration No. 333-98553 as Exhibit 3.1.)
 
 
 
(e)
 
2
 
 
By-laws of Southern Power Company effective January 8, 2001. (Designated in Registration No. 333-98553 as Exhibit 3.2.)
 
 
Southern Company Gas
 
 
 
(f)
 
1
 
 
Amended and Restated Articles of Incorporation of Southern Company Gas dated July 11, 2016. (Designated in Form 8-K dated July 8, 2016, File No. 1-14174, as Exhibit 3.1.)
 
 
 
(f)
 
2
 
 
By-laws of Southern Company Gas effective July 11, 2016. (Designated in Form 8-K dated July 8, 2016, File No. 1-14174, as Exhibit 3.2.)
 
 
 
 
 
 
 
 
 
 

E-2

     Table of Contents                                  Index to Financial Statements

(4)
 
Instruments Describing Rights of Security Holders, Including Indentures
 
 
With respect to each of Southern Company, Alabama Power, Georgia Power, Mississippi Power, Southern Power Company, and Southern Company Gas, such registrant has excluded certain instruments with respect to long-term debt that does not exceed 10% of the total assets of such registrant and its subsidiaries. Each such registrant agrees, upon request of the SEC, to furnish copies of any or all such instruments to the SEC.
 
 
Southern Company
 
 
 
(a)
 
1
 
 
Senior Note Indenture dated as of January 1, 2007, between Southern Company and Wells Fargo Bank, National Association, as Trustee, and certain indentures supplemental thereto through August 17, 2018. (Designated in Form 8-K dated January 11, 2007, File No. 1-3526, as Exhibit 4.1 , in Form 8-K dated August 21, 2013, File No. 1-3526, as Exhibit 4.2 , in Form 8-K dated August 19, 2014, File No. 1-3526, as Exhibit 4.2(b) , in Form 8-K dated June 9, 2015, File No. 1-3526, as Exhibit 4.2 , in Form 8-K dated May 19, 2016, File No. 1-3526, as Exhibit 4.2(a) , in Form 8-K dated May 19, 2016, File No. 1-3526, as Exhibit 4.2(b) , in Form 8-K dated May 19, 2016, File No. 1-3526, as Exhibit 4.2(c) , in Form 8-K dated May 19, 2016, File No. 1-3526, as Exhibit 4.2(d) , in Form 8-K dated May 19, 2016, File No. 1-3526, as Exhibit 4.2(e) , in  Form 8-K dated May 19, 2016, File No. 1-3526, as Exhibit 4.2(f) , in Form 8-K dated May 19, 2016, File No. 1-3526, as Exhibit 4.2(g) , in Form 10-Q for the quarter ended June 30, 2017, File No. 1-3526, as Exhibit 4(a)2 , and in Form 10-Q for the quarter ended September 30, 2018, File No. 1-3526, as Exhibit 4(a)1 .)
 
 
 
(a)
 
2
 
 
 
 
Alabama Power
 
 
 
(b)
 
1
 
 
Subordinated Note Indenture dated as of January 1, 1997, between Alabama Power and Regions Bank, as Successor Trustee, and certain indentures supplemental thereto through October 2, 2002. (Designated in Form 8-K dated January 9, 1997, File No. 1-3164, as Exhibits 4.1,  and in Form 8-K dated September 26, 2002, File No. 3164, as Exhibit 4.9-B .)
 
 
 
(b)
 
2
 
 
Senior Note Indenture dated as of December 1, 1997, between Alabama Power and Regions Bank, as Successor Trustee, and certain indentures supplemental thereto through June 28, 2018. (Designated in Form 8-K dated December 4, 1997, File No. 1-3164, as Exhibit 4.1 , in Form 8-K dated December 6, 2002, File No. 1-3164, as Exhibit 4.2 , in Form 8-K dated February 11, 2003, File No. 1-3164, as Exhibit 4.2(a) , in Form 8-K dated March 12, 2003, File No. 1-3164, as Exhibit 4.2 , in Form 8-K dated May 8, 2008, File No. 1-3164, as Exhibit 4.2 , in Form 8-K dated February 26, 2009, File No. 1-3164 as Exhibit 4.2 , in Form 8-K dated September 27, 2010, File No. 1-3164, as Exhibit 4.2 , in Form 8-K dated March 3, 2011, File No. 1-3164, as Exhibit 4.2,  in Form 8-K dated May 18, 2011, File No. 1-3164, as Exhibit 4.2(a) , in Form 8-K dated May 18, 2011, File No. 1-3164, as Exhibit 4.2(b) , in Form 8-K dated January 10, 2012, File No. 1-3164, as Exhibit 4.2 , in Form 8-K dated November 27, 2012, File No. 1-3164, as Exhibit 4.2 , in Form 8-K dated December 3, 2013, File No. 1-3164, as Exhibit 4.2,  in Form 8-K dated August 20, 2014, File No. 1-3164, as Exhibit 4.6,  in Form 8-K dated March 5, 2015, File No. 1-3164, as Exhibit 4.6 , in Form 8-K dated April 9, 2015, File No. 1-3164, as Exhibit 4.6(b) , in Form 8-K dated January 8, 2016, File No. 1-3164, as Exhibit 4.6 , in Form 8-K dated February 27, 2017, File No. 1-3164, as Exhibit 4.6 , in Form 8-K dated November 2, 2017, File No. 1-3164, as Exhibit 4.6 , and in Form 8-K dated June 21, 2018, File No. 1-3164, as Exhibit 4.6 .)
 
 
 
(b)
 
3
 
 
Amended and Restated Trust Agreement of Alabama Power Capital Trust V dated as of October 1, 2002.  (Designated in Form 8-K dated September 26, 2002, File No. 1-3164, as Exhibit 4.12-B.)
 
 
 
(b)
 
4
 
 
Guarantee Agreement relating to Alabama Power Capital Trust V dated as of October 1, 2002. (Designated in Form 8-K dated September 26, 2002, File No. 1-3164, as Exhibit 4.16-B.)

E-3

     Table of Contents                                  Index to Financial Statements

 
 
Georgia Power
 
 
 
(c)
 
1
 
 
Senior Note Indenture dated as of January 1, 1998, between Georgia Power and Wells Fargo Bank, National Association, as Successor Trustee, and certain indentures supplemental thereto through August 8, 2017. (Designated in Form 8-K dated January 21, 1998, File No. 1-6468, as Exhibits 4.1 , in Form 8-K dated April 10, 2003, File No. 1-6468, as Exhibit 4.1 , in Form 8-K dated March 6, 2007, File No. 1-6468, as Exhibit 4.2 , in Form 8-K dated February 4, 2009, File No. 1-6468, as Exhibit 4.2 , in Form 8-K dated December 8, 2009, File No. 1-6468, as Exhibit 4.2 , in Form 8-K dated May 24, 2010, File No. 1-6468, as Exhibit 4.2 , in Form 8-K dated August 26, 2010, File No. 1-6468, as Exhibit 4.2 , in Form 8-K dated February 29, 2012, File No. 1-6468, as Exhibit 4.2 , in Form 8-K dated May 8, 2012, File No. 1-6468, as Exhibit 4.2(b) , in Form 8-K dated March 12, 2013, File No. 1-6468, as Exhibit 4.2(a) , in Form 8-K dated March 2, 2016, File No. 1-6468, as Exhibit 4.2(a) , in Form 8-K dated March 2, 2016, File No. 1-6468, as Exhibit 4.2(b) , in Form 8-K dated February 28, 2017, File No. 1-6468, as Exhibit 4.2(a) , in Form 8-K dated February 28, 2017, File No. 1-6468, as Exhibit 4.2(b) , and in Form 8-K dated August 3, 2017, File No. 1-6468, as Exhibit 4.2 .)
 
 
 
(c)
 
2
 
 
Subordinated Note Indenture, dated as of September 1, 2017, between Georgia Power and Wells Fargo Bank, National Association, as Trustee, and First Supplemental Indenture thereto dated as of September 21, 2017. (Designated in Form 8-K dated September 18, 2017, File No. 1-6468, as Exhibit 4.3 , and in Form 8-K dated September 18, 2017, File No. 1-6468, as Exhibit 4.4 .)
 
 
 
(c)
 
3
 
 
Loan Guarantee Agreement between Georgia Power and the DOE dated as of February 20, 2014, Amendment No. 1 thereto dated as of June 4, 2015, Amendment No. 2 thereto dated as of March 9, 2016, Amendment No. 3 thereto dated as of July 27, 2017, and Amendment No. 4 thereto dated as of December 8, 2017. (Designated in Form 8-K dated February 20, 2014, File No. 1-6468, as Exhibit 4.1 , in Form 10-Q for the quarter ended June 30, 2015, File No. 1-6468, as Exhibit 10(c)1 , in Form 10-Q for the quarter ended March 31, 2016, File No. 1-6468, as Exhibit 4(c)3 , in Form 8-K dated July 27, 2017, File No. 1-6468, as Exhibit 4.1 , and in Form 8-K dated December 8, 2017, File No. 1-6468, as Exhibit 4.1 .)
 
 
 
(c)
 
4
 
 
Note Purchase Agreement among Georgia Power, the DOE, and the Federal Financing Bank dated as of February 20, 2014. (Designated in Form 8-K dated February 20, 2014, File No. 1-6468, as Exhibit 4.2.)
 
 
 
(c)
 
5
 
 
Future Advance Promissory Note dated February 20, 2014 made by Georgia Power to the FFB. (Designated in Form 8-K dated February 20, 2014, File No. 1-6468, as Exhibit 4.3.)
 
 
 
(c)
 
6
 
 
Deed to Secure Debt, Security Agreement and Fixture Filing between Georgia Power and PNC Bank, National Association, doing business as Midland Loan Services Inc., a division of PNC Bank, National Association dated as of February 20, 2014. (Designated in Form 8-K dated February 20, 2014, File No. 1-6468, as Exhibit 4.4.)
 
 
 
(c)
 
7
 
 
Owners Consent to Assignment and Direct Agreement and Amendment to Plant Alvin W. Vogtle Additional Units Ownership Participation Agreement by and among Georgia Power, OPC, MEAG Power, and Dalton dated as of February 20, 2014. (Designated in Form 8-K dated February 20, 2014, File No. 1-6468, as Exhibit 4.5.)
 
 
Mississippi Power
 
 
 
(d)
 
1
 
 
Senior Note Indenture dated as of May 1, 1998, between Mississippi Power and Wells Fargo Bank, National Association, as Successor Trustee, and certain indentures supplemental thereto through March 27, 2018. (Designated in Form 8-K dated May 14, 1998, File No. 001-11229, as Exhibit 4.1 , in Form 8-K dated October 11, 2011, File No. 001-11229, as Exhibit 4.2(b) , in Form 8-K dated March 5, 2012, File No. 001-11229, as Exhibit 4.2(b) , in Form 8-K dated March 22, 2018, File No. 001-11229, as Exhibit 4.2(a)  and in Form 8-K dated March 22, 2018, File No. 001-11229, as Exhibit 4.2(b) .)

E-4

     Table of Contents                                  Index to Financial Statements

 
 
Southern Power
 
 
 
(e)
 
1
 
 
Senior Note Indenture dated as of June 1, 2002, between Southern Power Company and Wells Fargo Bank, National Association, as Successor Trustee, and certain indentures supplemental thereto through November 20, 2017. (Designated in Registration No. 333-98553 as Exhibit 4.1 , in Form 8-K dated September 14, 2011, File No. 333-98553, as Exhibit 4.4 , in Form 8-K dated July 10, 2013, File No. 333-98553, as Exhibit 4.4 , in Form 8-K dated May 14, 2015, File No. 333-98553, as Exhibit 4.4(b) , in Form 8-K dated November 12, 2015, File No. 333-98553, as Exhibit 4.4(a) , in Form 8-K dated June 13, 2016, File No. 001-37803, as Exhibit 4.4(a) , in Form 8-K dated June 13, 2016, File No. 001-37803, as Exhibit 4.4(b) , in Form 10-Q for the quarter ended September 30, 2016, File No. 001-37803, as Exhibit 4(f)1 , in Form 10-Q for the quarter ended September 30, 2016, File No. 001-37803, as Exhibit 4(f)2 , in Form 8-K dated November 10, 2016, File No. 001-37803, as Exhibit 4.4(a) , in Form 8-K dated November 10, 2016, File No. 001-37803, as Exhibit 4.4(b) , in Form 8-K dated November 10, 2016, File No. 001-37803, as Exhibit 4.4(c) , and in Form 10-K for the year ended December 31, 2017, File No 001-37803, as Exhibit 4(f)2 .)
 
 
Southern Company Gas
 
 
 
(f)
 
1
 
 
Indenture dated February 20, 2001 between AGL Capital Corporation, AGL Resources Inc., and The Bank of New York, as Trustee. (Designated in Form S-3, File No. 333-69500, as Exhibit 4.2.)
 
 
 
(f)
 
2
 
 
Southern Company Gas Capital Corporation's 6.00% Senior Note s due 2034, 5.25% Senior Notes due 2019, Form of 3 . 50% Senior Note s due 2021, 5.875% Senior Notes due 2041, Form of Series B Senior Notes due 2018, 4.40% Senior Note s due 2043, 3.875% Senior Note s due 2025, 3.250% Senior Notes due 2026, Form of 2.450% Senior Note due October 1, 2023, Form of 3.950% Senior Note due October 1, 2046, and Form of Series 2017A 4.400% Senior Note due May 30, 2047. (Designated in Form 8-K dated September 22, 2004, File No. 1-14174, as Exhibit 4.1 , in Form 8-K dated August 5, 2009, File No. 1-14174, as Exhibit 4.1 , in Form 8-K dated September 15, 2011, File No. 1-14174, as Exhibit 4.1 , in Form 8-K dated March 16, 2011, File No. 1-14174, as Exhibit 4.1 , in Form 8-K dated August 31, 2011, File No. 1-14174, as Exhibit 4.2 , in Form 8-K dated May 13, 2013, File No. 1-14174, as Exhibit 4.2 , in Form 8-K dated November 13, 2015, File No. 1-14174, as Exhibit 4.2 , in Form 8-K dated May 13, 2016, File No. 1-14174, as Exhibit 4.2 , in Form 8-K dated September 8, 2016, File No. 1-14174, as Exhibit 4.1(a) , in Form 8-K dated September 8, 2016, File No. 1-14174, as Exhibit 4.1(b) , and in Form 8-K dated May 5, 2017, File No. 1-14174, as Exhibit 4.1 , respectively.)
 
 
 
(f)
 
3
 
 
Southern Company Gas' Guarant e e  related to the 6.00% Senior Notes due 2034 , Guarantee related to the 5.25% Senior Notes due 2019 ,  Guarantee related to the 5.875% Senior Notes due 2041, Form of Guarantee related to the 3.50% Senior Notes due 2021, Guarantee relat e d to the 4.40% Senior Notes due 2043, Guarantee related to the 3.875% Senior Notes due 2025, Guarantee related to the 3.250% Senior Notes due 2026, Form of Guarantee related to the 2.450% Senior Notes due October 1, 2023, Form of Guarantee related to the 3.950% Senior Notes due October 1, 2046, and Form of Guarantee related to the Series 2017A 4.400% Senior Notes due May 30, 2047. (Designated in Form 8-K dated September 22, 2004, File No. 1-14174, as Exhibit 4.3 , in Form 8-K dated March 16, 2011, File No. 1-14174, as Exhibit 4.2 , in Form 8-K dated September 15, 2011, File No. 1-14174, as Exhibit 4.2 , in Form 8-K dated May 13, 2013, File No. 1-14174, as Exhibit 4.3 , in Form 8-K dated November 13, 2015, File No. 1-14174, as Exhibit 4.3 , in Form 8-K dated May 13, 2016, File No. 1-14174, as Exhibit 4.3 , in Form 8-K dated September 8, 2016, File No. 1-14174, as Exhibit 4.3(a) , in Form 8-K dated September 8, 2016, File No. 1-14174, as Exhibit 4.3(b) , and in Form 8-K dated May 5, 2017, File No. 1-14174, as Exhibit 4.3 , respectively.)
 
 
 
(f)
 
4
 
 
Indenture dated December 1, 1989 of Atlanta Gas Light Company and First Supplemental Indenture thereto dated March 16, 1992. (Designated in Form S-3, File No. 33-32274, as Exhibit 4(a) and in Form S-3, File No. 33-46419, as Exhibit 4(a).)

E-5

     Table of Contents                                  Index to Financial Statements

 
 
 
(f)
 
5
 
 
Indenture of Commonwealth Edison Company to Continental Illinois National Bank and Trust Company of Chicago, Trustee, dated as of January 1, 1954, Indenture of Adoption of Northern Illinois Gas Company to Continental Illinois National Bank and Trust Company of Chicago, Trustee, dated February 9, 1954, and certain indentures supplemental thereto. (Designated in Form 10-K for the year ended December 31, 1995, File No. 1-7296, as Exhibit 4.01 , in Form 10-K for the year ended December 31, 1995, File No. 1-7296, as Exhibit 4.02 , in Registration No. 2-56578 as Exhibits 2.21 and 2.25, in Form 10-Q for the quarter ended June 30, 1996, File No. 1-7296, as Exhibit 4.01 , in Form 10-K for the year ended December 31, 1997, File No. 1-7296, as Exhibit 4.19 , in Form 10-K for the year ended December 31, 2003, File No. 1-7296, as Exhibit 4.09 , in Form 10-K for the year ended December 31, 2003, File No. 1-7296, as Exhibit 4.10 , in Form 10-K for the year ended December 31, 2003, File No. 1-7296, as Exhibit 4.11 , in Form 10-K for the year ended December 31, 2006, File No. 1-7296, as Exhibit 4.11 , in Form 10-Q for the quarter ended September 30, 2008, File No. 1-7296, as Exhibit 4.01 , in Form 10-Q for the quarter ended June 31, 2009, File No. 1-7296, as Exhibit 4.01 , in Form 10-Q for the quarter ended September 30, 2012, File No. 1-7296, as Exhibit 4 , in Form 10-K for the year ended December 31, 2016, File No. 1-14174, as Exhibit 4(g)6 , in Form 10-K for the year ended December 31, 2017, File No. 1-14174, as Exhibit 4(g)6 , and in Form 10-Q for the quarter ended September 30, 2018, File No. 1-14174, as Exhibit 4(g)1 .)
 
 
 
 
 
 
 
 
 
 
(10)
 
Material Contracts
 
 
Southern Company
 
 
#
(a)
 
1
 
 
Southern Company 2011 Omnibus Incentive Compensation Plan effective May 25, 2011. (Designated in Form 8-K dated May 25, 2011, File No. 1-3526, as Exhibit 10.1.)
 
 
#
(a)
 
2
 
 
Form of Stock Option Award Agreement for Executive Officers of Southern Company under the Southern Company Omnibus Incentive Compensation Plan. (Designated in Form 10-Q for the quarter ended March 31, 2011, File No. 1-3526, as Exhibit 10(a)3 .)
 
 
#
(a)
 
3
 
 
Deferred Compensation Plan for Outside Directors of The Southern Company, Amended and Restated effective January 1, 2008 and First Amendment thereto effective April 1, 2015. (Designated in Form 10-K for the year ended December 31, 2007, File No. 1-3526, as Exhibit 10(a)3  and in Form 10-Q for the quarter ended June 30, 2015, File No. 1-3526, as Exhibit 10(a)2 .)
 
 
#
(a)
 
4
 
 
Southern Company Deferred Compensation Plan, Amended and Restated as of January 1, 2018. (Designated in Form 10-K for the year ended December 31, 2017, File No. 1-3536, as Exhibit 10(a)4. )
 
 
#
(a)
 
5
 
 
The Southern Company Supplemental Executive Retirement Plan, Amended and Restated effective June 30, 2016, Amendment No. 1 thereto effective January 1, 2017, Amendment No. 2 thereto effective January 1, 2018, and Amendment No. 3 thereto effective April 1, 2018. (Designated in Form 10-Q for the quarter ended June 30, 2016, File No. 1-3526, as Exhibit 10(a)1 , in Form 10-K for the year ended December 31, 2016, File No. 1-3536, as Exhibit 10(a)18 , in Form 10-K for the year ended December 31, 2017, File No. 1-3526, as Exhibit 10(a)16 , and in Form 10-Q for the quarter ended March 31, 2018, File No. 1-3526, as Exhibit 10(a)1 .)
 
 
#
(a)
 
6
 
 
The Southern Company Supplemental Benefit Plan, Amended and Restated effective as of June 30, 2016, Amendment No. 1 thereto effective January 1, 2017, Amendment No. 2 thereto effective January 1, 2018, and Amendment No. 3 thereto effective April 1, 2018. (Designated in Form 10-Q for the quarter ended June 30, 2016, File No. 1-3526, as Exhibit 10(a)2 , in Form 10-K for the year ended December 31, 2016, File No. 1-3536, as Exhibit 10(a)19 , in Form 10-K for the year ended December 31, 2017, File No. 1-3526, as Exhibit 10(a)17,  and in Form 10-Q for the quarter ended March 31, 2018, File No. 1-3526, as Exhibit 10(a)2 .)
 
 
#
(a)
 
7
 
 
The Southern Company Change in Control Benefits Protection Plan (an amendment and restatement of The Southern Company Change in Control Benefit Plan Determination Policy), effective December 31, 2008 and Amendment No. 1 thereto effective March 1, 2018. ( Designated in Form 8-K dated December 31, 2008, File No. 1-3526, as Exhibit 10.1  and in Form 10-Q for the quarter ended March 31, 2018, File No. 1-3526, as Exhibit 10(a)3 .)

E-6

     Table of Contents                                  Index to Financial Statements

 
 
#
(a)
 
8
 
 
Deferred Compensation Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective January 1, 2001, between Wells Fargo Bank, N.A., as successor to Wachovia Bank, N.A., Southern Company, SCS, Alabama Power, Georgia Power, Mississippi Power, Southern Linc, Southern Company Energy Solutions, LLC, and Southern Nuclear and First Amendment thereto effective January 1, 2009. (Designated in  Form 10-K for the year ended December 31, 2000, File No. 1-3526, as Exhibit 10(a)103  and in Form 10-K for the year ended December 31, 2008, File No. 1-3526, as Exhibit 10(a)16 .)
 
 
#
(a)
 
9
 
 
Deferred Stock Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective January 1, 2000, between Reliance Trust Company, Southern Company, Alabama Power, Georgia Power, and Mississippi Power and First Amendment thereto effective January 1, 2009. (Designated in Form 10-K for the year ended December 31, 2000, File No. 1-3526, as Exhibit 10(a)104  and in Form 10-K for the year ended December 31, 2008, File No. 1-3526, as Exhibit 10(a)18 .)
 
 
#
(a)
 
10
 
 
Deferred Cash Compensation Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective September 1, 2001, between Wells Fargo Bank, N.A., as successor to Wachovia Bank, N.A., Southern Company, Alabama Power, Georgia Power, and Mississippi Power and First Amendment thereto effective January 1, 2009. (Designated in Form 10-K for the year ended December 31, 2001, File No. 1-3526, as Exhibit 10(a)92  and in Form 10-K for the year ended December 31, 2008, File No. 1-3526, as Exhibit 10(a)20 .)
 
 
#
(a)
 
11
 
 
Southern Company Senior Executive Change in Control Severance Plan, Amended and Restated effective December 31, 2008, First Amendment thereto effective October 19, 2009, and Second Amendment thereto effective February 22, 2011. (Designated in Form 10-K for the year ended December 31, 2008, File No. 1-3526, as Exhibit 10(a)23 , in Form 10-K for the year ended December 31, 2009, File No. 1-3526, as Exhibit 10(a)22 , and in Form 10-K for the year ended December 31, 2010, File No. 1-3526, as Exhibit 10(a)16 .)
 
 
#
(a)
 
12
 
 
Southern Company Executive Change in Control Severance Plan, Amended and Restated effective December 31, 2008 and First Amendment thereto effective January 1, 2010. (Designated in Form 10-K for the year ended December 31, 2008, File No. 1-3526, as Exhibit 10(a)24  and in Form 10-K for the year ended December 31, 2009, File No. 1-3526, as Exhibit 10(a)24 .)
 
 
#
(a)
 
13
 
 
Form of Terms for Performance Share Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. (Designated in Form 10-Q for the quarter ended March 31, 2017, File No. 1-3526, as Exhibit 10(a)1 ).
 
 
#
(a)
 
14
 
 
Outside Directors Stock Plan for The Southern Company and its Subsidiaries effective June 1, 2015. (Designated in Definitive Proxy Statement filed April 10, 2015, File No. 1-3526, as Appendix A .)
 
 
#
(a)
 
15
 
 
Deferred Compensation Agreement between Southern Company, SCS, Alabama Power, and Mark A. Crosswhite, effective July 30, 2008. (Designated in Form 10-K for the year ended December 31, 2016, File No. 1-3526, as Exhibit 10(a)17 .)
 
 
 
(a)
 
16
 
 
The Southern Company Employee Savings Plan, Amended and Restated effective January 1, 2018. (Designated in Post-Effective Amendment No. 1 to Form S-8, File No. 333-212783 as Exhibit 4.3 .)
 
 
#
(a)
 
17
 
 
Form of Terms for Restricted Stock Unit with Performance Measure Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. (Designated in Form 10-Q for the quarter ended March 31, 2017, File No. 1-3526, as Exhibit 10(a)2 .)
 
 
#
(a)
 
18
 
 
Letter Agreement among Southern Company Gas, Southern Company, and Andrew W. Evans and Performance Stock Unit Award Agreement, dated September 29, 2016. (Designated in Form 10-Q for the quarter ended March 31, 2017, File No. 1-3526, as Exhibit 10(a)3 .)
 
 
#
(a)
 
19
 
 
Form of Time-Vesting Restricted Stock Unit Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. (Designated in Form 10-Q for the quarter ended March 31, 2017, File No. 1-3526, as Exhibit 10(a)4 .)
 
 
#
(a)
 
20
 
 
Consulting Agreement between SCS and Arthur P. Beattie effective August 1, 2018. (Designated in Form 10-Q for the quarter ended June 30, 2018, File No. 1-3526, as Exhibit 10(a)1.)
 
 
#   *
(a)
 
21
 
 
 
 
#   *
(a)
 
22
 
 

E-7

     Table of Contents                                  Index to Financial Statements

 
 
#   *
(a)
 
23
 
 
 
 
#   *
(a)
 
24
 
 
 
 
#   *
(a)
 
25
 
 
 
 
#   *
(a)
 
26
 
 
 
 
#   *
(a)
 
27
 
 
 
 
#   *
(a)
 
28
 
 
 
 
Alabama Power
 
 
 
(b)
 
1
 
 
Intercompany Interchange Contract as revised effective May 1, 2007, among Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern Power Company, and SCS. (Designated in Form 10-Q for the quarter ended March 31, 2007, File No. 1-3164, as Exhibit 10(b)5 .)
 
 
*
(b)
 
2
 
 
 
 
#
(b)
 
3
 
 
Southern Company 2011 Omnibus Incentive Compensation Plan effective May 25, 2011. See Exhibit 10(a)1 herein.
 
 
#
(b)
 
4
 
 
Form of Stock Option Award Agreement for Executive Officers of Southern Company under the Southern Company Omnibus Incentive Compensation Plan. See Exhibit 10(a)2 herein.
 
 
#
(b)
 
5
 
 
Southern Company Deferred Compensation Plan, Amended and Restated as of January 1, 2018. See Exhibit 10(a)4 herein.
 
 
#
(b)
 
6
 
 
The Southern Company Supplemental Executive Retirement Plan, Amended and Restated effective June 30, 2016 and Amendment No. 1 thereto effective January 1, 2017. See Exhibit 10(a)5 herein.
 
 
#
(b)
 
7
 
 
The Southern Company Supplemental Benefit Plan, Amended and Restated effective as of June 30, 2016 and Amendment No. 1 thereto effective January 1, 2017. See Exhibit 10(a)6 herein.
 
 
#
(b)
 
8
 
 
Southern Company Executive Change in Control Severance Plan, Amended and Restated effective December 31, 2008 and First Amendment thereto effective January 1, 2010. See Exhibit 10(a)12 herein.
 
 
#
(b)
 
9
 
 
Deferred Compensation Plan for Outside Directors of Alabama Power Company, Amended and Restated effective January 1, 2008 and First Amendment thereto effective June 1, 2015. (Designated in Form 10-Q for the quarter ended June 30, 2008, File No. 1-3164, as Exhibit 10(b)1  and in Form 10-Q for the quarter ended June 30, 2015, File No. 1-3164, as Exhibit 10(b)1 .)
 
 
#
(b)
 
10
 
 
The Southern Company Change in Control Benefits Protection Plan (an amendment and restatement of The Southern Company Change in Control Benefit Plan Determination Policy), effective December 31, 2008. See Exhibit 10(a)7 herein.
 
 
#
(b)
 
11
 
 
Deferred Compensation Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective January 1, 2001, between Wells Fargo Bank, N.A., as successor to Wachovia Bank, N.A., Southern Company, SCS, Alabama Power, Georgia Power, Mississippi Power, Southern Linc, Southern Company Energy Solutions, LLC, and Southern Nuclear and First Amendment thereto effective January 1, 2009. See Exhibit 10(a)8 herein.
 
 
#
(b)
 
12
 
 
Deferred Stock Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective January 1, 2000, between Reliance Trust Company, Southern Company, Alabama Power, Georgia Power, and Mississippi Power and First Amendment thereto effective January 1, 2009. See Exhibit 10(a)9 herein.
 
 
#
(b)
 
13
 
 
Deferred Cash Compensation Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective September 1, 2001, between Wells Fargo Bank, N.A., as successor to Wachovia Bank, N.A., Southern Company, Alabama Power, Georgia Power, and Mississippi Power and First Amendment thereto effective January 1, 2009. See Exhibit 10(a)10 herein.

E-8

     Table of Contents                                  Index to Financial Statements

 
 
#
(b)
 
14
 
 
Southern Company Senior Executive Change in Control Severance Plan, Amended and Restated effective December 31, 2008, First Amendment thereto effective October 19, 2009, and Second Amendment thereto effective February 22, 2011. See Exhibit 10(a)11 herein.
 
 
#
(b)
 
15
 
 
Form of Terms for Performance Share Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. See Exhibit 10(a)13 herein.
 
 
#
(b)
 
16
 
 
Deferred Compensation Agreement between Southern Company, Alabama Power, Georgia Power, Mississippi Power, and SCS and Philip C. Raymond dated September 15, 2010. (Designated in Form 10-Q for the quarter ended September 30, 2010, File No. 1-3164, as Exhibit 10(b)2 .)
 
 
#
(b)
 
17
 
 
Deferred Compensation Agreement between Southern Company, SCS, Alabama Power, and Mark A. Crosswhite, effective July 30, 2008. See Exhibit 10(a)15 herein.
 
 
#
(b)
 
18
 
 
Outside Directors Stock Plan for The Southern Company and its Subsidiaries effective June 1, 2015. See Exhibit 10(a)14 herein.
 
 
#
(b)
 
19
 
 
Form of Terms for Restricted Stock Unit with Performance Measure Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. See Exhibit 10(a)17 herein.
 
 
#
(b)
 
20
 
 
Form of Time-Vesting Restricted Stock Unit Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. See Exhibit 10(a)19 herein.
 
 
#
(b)
 
21
 
 
First Amendment to the Southern Company Deferred Compensation Plan, dated December 7, 2018. See Exhibit 10(a)21 herein.
 
 
#
(b)
 
22
 
 
Second Amendment to the Southern Company Deferred Compensation Plan, dated January 29, 2019.  See Exhibit 10(a)22 herein.
 
 
#
(b)
 
23
 
 
Fourth Amendment to the Southern Company Supplemental Executive Retirement Plan, dated December 7, 2018. See Exhibit 10(a)23 herein.
 
 
#
(b)
 
24
 
 
Fifth Amendment to the Southern Company Supplemental Executive Retirement Plan, dated January 29, 2019.  (See Exhibit 10(a)24 herein.
 
 
#
(b)
 
25
 
 
Fourth Amendment to the Southern Company Supplemental Benefit Plan, dated December 14, 2018. See Exhibit 10(a)25 herein.
 
 
#
(b)
 
26
 
 
Fifth Amendment to the Southern Company Supplemental Benefit Plan, dated January 29, 2019.  See Exhibit 10(a)26 herein.
 
 
#
(b)
 
27
 
 
Second Amendment to the Deferred Stock Trust Agreement For Directors of Southern Company and Its Subsidiaries, dated December 29, 2018. See Exhibit 10(a)27 herein.
 
 
#
(b)
 
28
 
 
Second Amendment to the Deferred Cash Compensation Trust Agreement For Directors of Southern Company and Its Subsidiaries, dated December 21, 2018. See Exhibit 10(a)28 herein.
 
 
Georgia Power
 
 
 
(c)
 
1
 
 
Intercompany Interchange Contract as revised effective May 1, 2007, among Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern Power Company, and SCS. See Exhibit 10(b)1 herein.
 
 
 
(c)
 
2
 
 
Appendix A to the Southern Company System Intercompany Interchange Contract, dated as of January 1, 2019. See Exhibit 10(b)2 herein.
 
 
 
(c)
 
3
 
 
Revised and Restated Integrated Transmission System Agreement dated as of November 12, 1990, between Georgia Power and OPC. (Designated in Form 10-K for the year ended December 31, 1990, File No. 1-6468, as Exhibit 10(g).)
 
 
 
(c)
 
4
 
 
Revised and Restated Integrated Transmission System Agreement between Georgia Power and Dalton dated as of December 7, 1990. (Designated in Form 10-K for the year ended December 31, 1990, File No. 1-6468, as Exhibit 10(gg).)
 
 
 
(c)
 
5
 
 
Revised and Restated Integrated Transmission System Agreement between Georgia Power and MEAG dated as of December 7, 1990. (Designated in Form 10-K for the year ended December 31, 1990, File No. 1-6468, as Exhibit 10(hh).)

E-9

     Table of Contents                                  Index to Financial Statements

 
 
 
(c)
 
6
 
 
Interim Assessment Agreement dated as of March 29, 2017, by and among Georgia Power, for itself and as agent for OPC, MEAG, and Dalton, and Westinghouse, WECTEC Staffing Services LLC, and WECTEC Global Project Services, Inc., Amendment 1 thereto dated as of April 28, 2017, Amendment 2 thereto dated as of May 12, 2017, Amendment 3 thereto dated as of June 3, 2017, Amendment 4 thereto dated as of June 5, 2017, Amendment 5 thereto dated as of March 29, 2017, Amendment 6 thereto dated as of June 22, 2017, Amendment 7 thereto dated as of June 28, 2017 and Amendment 8 thereto dated as of July 20, 2017. (Designated in Form 10-Q for the quarter ended March 31, 2017, File No. 1-6468, as Exhibit 10(c)3 , in Form 10-Q for the quarter ended March 31, 2017, File No. 1-6468, as Exhibit 10(c)4 , in Form 8-K dated May 12, 2017, File No. 1-6468, as Exhibit 10.1 , in Form 8-K dated June 3, 2017, File No. 1-6468, as Exhibit 10.1 , in Form 8-K dated June 5, 2017, File No. 1-6468, as Exhibit 10.1 , in Form 8-K dated June 16, 2017, File No. 1-6468, as Exhibit 10.2 , in Form 8-K dated June 22, 2017, File No. 1-6468, as Exhibit 10.1 , in Form 8-K dated June 28, 2017, File No. 1-6468, as Exhibit 10.1 , and in Form 8-K dated July 20, 2017, File No. 1-6468, as Exhibit 10.1 .)
 
 
 
(c)
 
7
 
 
Settlement Agreement dated as of June 9, 2017, by and among Georgia Power, OPC, MEAG, Dalton, and Toshiba and Amendment No. 1 thereto dated as of December 8, 2017. (Designated in Form 8-K dated June 16, 2017, File No. 1-6468, as Exhibit 10.1  and in Form 8-K dated December 8, 2017, File No. 1-6468, as Exhibit 10.1 .)
 
 
 
(c)
 
8
 
 
Amended and Restated Services Agreement dated as of June 20, 2017, by and among Georgia Power, for itself and as agent for OPC, MEAG, MEAG Power SPVJ, LLC, MEAG Power SPVM, LLC, MEAG Power SPVP, LLC, and Dalton, and Westinghouse and WECTEC Global Project Services, Inc. (Georgia Power requested confidential treatment for certain portions of this document pursuant to an application for confidential treatment sent to the SEC. Georgia Power omitted such portions from the filing and filed them separately with the SEC.) (Designated in Form 10-Q for the quarter ended June 30, 2017, File No. 1-6468, as Exhibit 10(c)9 .)
 
 
 
(c)
 
9
 
 
Construction Completion Agreement dated as of October 23, 2017, between Georgia Power, for itself and as agent for OPC, MEAG, MEAG Power SPVJ, LLC, MEAG Power SPVM, LLC, MEAG Power SPVP, LLC, and Dalton, and Bechtel. (Georgia Power has requested confidential treatment for certain portions of this document pursuant to an application for confidential treatment sent to the SEC. Georgia Power omitted such portions from the filing and filed them separately with the SEC.) (Designated in Form 10-K for the year ended December 31, 2017, File No. 1-6468, as Exhibit 10(c)8 .)
 
 
*
(c)
 
10
 
 
Amendment No. 1 to Construction Completion Agreement dated as of October 12, 2018, between Georgia Power, for itself and as agent for OPC, MEAG, MEAG Power SPVJ, LLC, MEAG Power SPVM, LLC, MEAG Power SPVP, LLC, and Dalton, and Bechtel.  (Georgia Power has requested confidential treatment for certain portions of this document pursuant to an application for confidential treatment sent to the SEC. Georgia Power omitted such portions from the filing and filed them separately with the SEC.)
 
 
 
(c)
 
11
 
 
Plant Alvin W. Vogtle Additional Units Ownership Participation Agreement dated as of April 21, 2006, among Georgia Power, OPC, MEAG, and The City of Dalton, Georgia, Amendment 1 thereto dated as of April 8, 2008, Amendment 2 thereto dated as of February 20, 2014, Agreement Regarding Additional Participating Party Rights and Amendment 3 thereto dated as of November 2, 2017, and First Amendment to Agreement Regarding Additional Participating Party Rights and Amendment No. 3 to Plant Alvin W. Vogtle Additional Units Ownership Participation Agreement, dated as of August 31, 2018. (Designated in Form 8-K dated April 21, 2006, File No. 33-7591, as Exhibit 10.4.4 , in Form 10-K for the year ended December 31, 2013, File No. 000-53908, as Exhibit 10.3.2(a) , in Form 10-K for the year ended December 31, 2013, File No. 000-53908, as Exhibit 10.3.2(b) , in Form 10-Q for the quarter ended September 30, 2017, File No. 000-53908, as Exhibit 10.1 , and in Form 8-K dated August 31, 2018, File No. 1-6468, as Exhibit 10.1 .)
 
 
*
(c)
 
12
 
 
 
 
Mississippi Power
 
 
 
(d)
 
1
 
 
Intercompany Interchange Contract as revised effective May 1, 2007, among Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern Power Company, and SCS. See Exhibit 10(b)1 herein.
 
 
 
(d)
 
2
 
 
Appendix A to the Southern Company System Intercompany Interchange Contract, dated as of January 1, 2019. See Exhibit 10(b)2 herein.

E-10

     Table of Contents                                  Index to Financial Statements

 
 
 
(d)
 
3
 
 
Transmission Facilities Agreement dated February 25, 1982, Amendment No. 1 dated May 12, 1982 and Amendment No. 2 dated December 6, 1983, between Entergy Corporation (formerly Gulf States) and Mississippi Power. (Designated in Form 10-K for the year ended December 31, 1981, File No. 001-11229, as Exhibit 10(f), in Form 10-K for the year ended December 31, 1982, File No. 001-11229, as Exhibit 10(f)(2), and in Form 10-K for the year ended December 31, 1983, File No. 001-11229, as Exhibit 10(f)(3).)
 
 
 
(d)
 
4
 
 
Cooperative Agreement between the DOE and SCS dated as of December 12, 2008. (Designated in Form 10-K for the year ended December 31, 2008, File No. 001-11229, as Exhibit 10(e)22 .) (Mississippi Power requested confidential treatment for certain portions of this document pursuant to an application for confidential treatment sent to the SEC. Mississippi Power omitted such portions from this filing and filed them separately with the SEC.)
 
 
Southern Power
 
 
 
(e)
 
1
 
 
Intercompany Interchange Contract as revised effective May 1, 2007, among Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern Power Company, and SCS. See Exhibit 10(b)1 herein.
 
 
 
(e)
 
2
 
 
Appendix A to the Southern Company System Intercompany Interchange Contract, dated as of January 1, 2019. See Exhibit 10(b)2 herein.
 
 
Southern Company Gas
 
 
 
(f)
 
1
 
 
Final Allocation Agreement dated January 3, 2008. (Designated in Form 10-K for the year ended December 31, 2007, File No. 1-7296, as Exhibit 10.15 .)
 
 
 
(f)
 
2
 
 
Asset Purchase Agreement, dated as of October 15, 2017, by and between Pivotal Utility Holdings, Inc., as Seller, and South Jersey Industries, Inc., as Buyer. (Designated in Form 8-K dated October 15, 2017, File No. 1-14174, as Exhibit 10.1 .)
 
 
 
 
 
 
 
 
 
 
(14)
 
Code of Ethics
 
 
Southern Company
 
 
 
(a)
 
 
 
 
 
 
Alabama Power
 
 
 
(b)
 
 
 
 
The Southern Company Code of Ethics. See Exhibit 14(a) herein.
 
 
Georgia Power
 
 
 
(c)
 
 
 
 
The Southern Company Code of Ethics. See Exhibit 14(a) herein.
 
 
Mississippi Power
 
 
 
(d)
 
 
 
 
The Southern Company Code of Ethics. See Exhibit 14(a) herein.
 
 
Southern Power
 
 
 
(e)
 
 
 
 
The Southern Company Code of Ethics. See Exhibit 14(a) herein.
 
 
Southern Company Gas
 
 
 
(f)
 
 
 
 
The Southern Company Code of Ethics. See Exhibit 14(a) herein.
 
 
 
 
 
 
 
 
 
 
(21)
 
Subsidiaries of Registrants
 
 
Southern Company
 
 
*
(a)
 
 
 
 
 
 
Alabama Power
 
 
 
(b)
 
 
 
 
Subsidiaries of Registrant. See Exhibit 21(a) herein.
 
 
Georgia Power
 
 
 
Omitted pursuant to General Instruction I(2)(b) of Form 10-K.
 
 
Mississippi Power
 
 
 
Omitted pursuant to General Instruction I(2)(b) of Form 10-K.
 
 
Southern Power
 
 
 
Omitted pursuant to General Instruction I(2)(b) of Form 10-K.
 
 
Southern Company Gas
 
 
 
Omitted pursuant to General Instruction I(2)(b) of Form 10-K

E-11

     Table of Contents                                  Index to Financial Statements

 
 
 
 
 
 
 
 
 
 
(23)
 
Consents of Experts and Counsel
 
 
Southern Company
 
 
*
(a)
 
1

 
 
 
 
Alabama Power
 
 
*
(b)
 
1

 
 
 
 
Georgia Power
 
 
*
(c)
 
1

 
 
 
 
Mississippi Power
 
 
*
(d)
 
1

 
 
 
 
Southern Power
 
 
*
(e)
 
1

 
 
 
 
Southern Company Gas
 
 
*
(f)
 
1

 
 
 
 
*
(f)
 
2

 
 
 
 
*
(f)
 
3

 
 
 
 
 
 
 
 
 
 
 
 
(24)
 
Powers of Attorney and Resolutions
 
 
Southern Company
 
 
*
(a)
 
1

 
 
 
 
*
(a)
 
2

 
 
 
 
Alabama Power
 
 
*
(b)
 
 
 
 
 
 
Georgia Power
 
 
*
(c)
 
 
 
 
 
 
Mississippi Power
 
 
*
(d)
 
 
 
 
 
 
Southern Power
 
 
*
(e)
 
1

 
 
 
 
*
(e)
 
2

 
 
 
 
Southern Company Gas
 
 
*
(f)
 
1

 
 
 
 
*
(f)
 
2

 
 
 
 
 
 
 
 
 
 
 
 
(31)
 
Section 302 Certifications
 
 
Southern Company
 
 
*
(a)
 
1
 
 
 
 
*
(a)
 
2
 
 
 
 
Alabama Power
 
 
*
(b)
 
1
 
 
 
 
*
(b)
 
2
 
 
 
 
Georgia Power
 
 
*
(c)
 
1
 
 
 
 
*
(c)
 
2
 
 

E-12

     Table of Contents                                  Index to Financial Statements

 
 
Mississippi Power
 
 
*
(d)
 
1
 
 
 
 
*
(d)
 
2
 
 
 
 
Southern Power
 
 
*
(e)
 
1
 
 
 
 
*
(e)
 
2
 
 
 
 
Southern Company Gas
 
 
*
(f)
 
1
 
 
 
 
*
(f)
 
2
 
 
 
 
 
 
 
 
 
 
 
 
(32)
 
Section 906 Certifications
 
 
Southern Company
 
 
*
(a)
 
 
 
 
 
 
Alabama Power
 
 
*
(b)
 
 
 
 
 
 
Georgia Power
 
 
*
(c)
 
 
 
 
 
 
Mississippi Power
 
 
*
(d)
 
 
 
 
 
 
Southern Power
 
 
*
(e)
 
 
 
 
 
 
Southern Company Gas
 
 
*
(f)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(99)
 
Additional Exhibits
 
 
Southern Company Gas
 
 
*
(f)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(101)
XBRL-Related Documents
 
 
*
INS
 
 
 
XBRL Instance Document
 
 
*
SCH
 
 
 
XBRL Taxonomy Extension Schema Document
 
 
*
CAL
 
 
 
XBRL Taxonomy Calculation Linkbase Document
 
 
*
DEF
 
 
 
XBRL Definition Linkbase Document
 
 
*
LAB
 
 
 
XBRL Taxonomy Label Linkbase Document
 
 
*
PRE
 
 
 
XBRL Taxonomy Presentation Linkbase Document
** Schedules and exhibits have been omitted pursuant to Item 601(b)(2) of Regulation S-K. A copy of any omitted schedule or exhibit will be furnished supplementally to the Securities and Exchange Commission upon request; provided, however, that each registrant may request confidential treatment pursuant to Rule 24b-2 of the Securities Exchange Act of 1934, as amended, for any schedules or exhibits so furnished.

E-13

     Table of Contents                                  Index to Financial Statements

THE SOUTHERN COMPANY
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.
THE SOUTHERN COMPANY
 
 
By:
Thomas A. Fanning
 
Chairman, President, and
 
Chief Executive Officer
 
 
By:
/s/Melissa K. Caen
 
(Melissa K. Caen, Attorney-in-fact)
 
 
Date:
February 19, 2019
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.
 
Thomas A. Fanning
Chairman, President, and
Chief Executive Officer
(Principal Executive Officer)
 
 
 
 
 
 
 
Andrew W. Evans
Executive Vice President and Chief Financial Officer
(Principal Financial Officer)
 
 
 
 
 
 
 
Ann P. Daiss
Comptroller and Chief Accounting Officer
(Principal Accounting Officer)
 
 
 
Directors:
 
 
Janaki Akella
Juanita Powell Baranco
Jon A. Boscia
Henry A. Clark III
Anthony F. Earley, Jr.
David J. Grain
Veronica M. Hagen
Donald M. James
John D. Johns
Dale E. Klein
Ernest J. Moniz
William G. Smith, Jr.
Steven R. Specker
Larry D. Thompson
E. Jenner Wood III

 
 
By:
 
/s/Melissa K. Caen
 
 
(Melissa K. Caen, Attorney-in-fact)
Date: February 19, 2019



     Table of Contents                                  Index to Financial Statements

ALABAMA POWER COMPANY
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.
ALABAMA POWER COMPANY
 
 
By:
Mark A. Crosswhite
 
Chairman, President, and Chief Executive Officer
 
 
By:
/s/Melissa K. Caen
 
(Melissa K. Caen, Attorney-in-fact)
 
 
Date:
February 19, 2019
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.
 
Mark A. Crosswhite
Chairman, President, and Chief Executive Officer
(Principal Executive Officer)
 
 
 
 
 
 
 
Philip C. Raymond
Executive Vice President, Chief Financial Officer, and Treasurer
(Principal Financial Officer)
 
 
 
 
 
 
 
Anita Allcorn-Walker
Vice President and Comptroller
(Principal Accounting Officer)
 
 
 
Directors:
 
 
Whit Armstrong
Angus R. Cooper, III
O. B. Grayson Hall, Jr.
Anthony A. Joseph
James K. Lowder

Robert D. Powers
Catherine J. Randall
C. Dowd Ritter
R. Mitchell Shackleford, III
Phillip M. Webb
 
 
By:
 
/s/Melissa K. Caen
 
 
(Melissa K. Caen, Attorney-in-fact)
Date: February 19, 2019



     Table of Contents                                  Index to Financial Statements

GEORGIA POWER COMPANY
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.
GEORGIA POWER COMPANY
 
 
By:
W. Paul Bowers
 
Chairman, President, and Chief Executive Officer
 
 
By:
/s/Melissa K. Caen
 
(Melissa K. Caen, Attorney-in-fact)
 
 
Date:
February 19, 2019
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.
 
W. Paul Bowers
Chairman, President, and Chief Executive Officer
(Principal Executive Officer)
 
 
 
 
 
 
 
Xia Liu
Executive Vice President, Chief Financial Officer,
and Treasurer
(Principal Financial Officer)
 
 
 
 
 
 
 
David P. Poroch
Comptroller and Vice President
(Principal Accounting Officer)
 
 
 
Directors:
 
 
Mark L. Burns
Shantella E. Cooper
Lawrence L. Gellerstedt III
Douglas J. Hertz
Kessel D. Stelling, Jr.
Jimmy C. Tallent
Charles K. Tarbutton
Beverly Daniel Tatum
Clyde C. Tuggle
 
 
By:
 
/s/Melissa K. Caen
 
 
(Melissa K. Caen, Attorney-in-fact)
Date:  February 19, 2019



     Table of Contents                                  Index to Financial Statements

MISSISSIPPI POWER COMPANY
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.
MISSISSIPPI POWER COMPANY
 
 
By:
Anthony L. Wilson
 
Chairman, President, and Chief Executive Officer
 
 
By:
/s/Melissa K. Caen
 
(Melissa K. Caen, Attorney-in-fact)
 
 
Date:
February 19, 2019
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.
 
Anthony L. Wilson
Chairman, President, and Chief Executive Officer
(Principal Executive Officer)
 
 
 
 
 
 
 
Moses H. Feagin
Vice President, Treasurer, and
Chief Financial Officer
(Principal Financial Officer)
 
 
 
 
 
 
 
Cynthia F. Shaw
Comptroller
(Principal Accounting Officer)
 
 
 
Directors:
 
 
Carl J. Chaney
L. Royce Cumbest
Thomas M. Duff
Mark E. Keenum
Christine L. Pickering
M.L. Waters
Camille S. Young
 
 
By:
 
/s/Melissa K. Caen
 
 
(Melissa K. Caen, Attorney-in-fact)
Date: February 19, 2019


Supplemental Information to be Furnished with Reports Filed Pursuant to Section 15(d) of the Act by Registrants Which Have Not Registered Securities Pursuant to Section 12 of the Act:

Mississippi Power is not required to send an annual report or proxy statement to its sole shareholder and parent company, The Southern Company, and will not prepare such a report after filing this Annual Report on Form 10-K for fiscal year 2018 . Accordingly, Mississippi Power will not file an annual report with the Securities and Exchange Commission.




     Table of Contents                                  Index to Financial Statements

SOUTHERN POWER COMPANY
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.
SOUTHERN POWER COMPANY
 
 
By:
Mark S. Lantrip
 
Chairman, President and Chief Executive Officer
 
 
By:
/s/Melissa K. Caen
 
(Melissa K. Caen, Attorney-in-fact)
 
 
Date:
February 19, 2019
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.
 
Mark S. Lantrip
Chairman, President, and Chief Executive Officer
(Principal Executive Officer)
 
 
 
 
 
 
 
William C. Grantham
Senior Vice President, Chief Financial Officer, and Treasurer
(Principal Financial Officer)
 
 
 
 
 
 
 
Elliott L. Spencer
Comptroller and Corporate Secretary
(Principal Accounting Officer)
 
 
 
Directors:
 
 
Stan W. Connally
Andrew W. Evans
Thomas A. Fanning
Kimberly S. Greene
James Y. Kerr, II
Christopher C. Womack
 
 
By:
 
/s/Melissa K. Caen
 
 
(Melissa K. Caen, Attorney-in-fact)
Date: February 19, 2019



     Table of Contents                                  Index to Financial Statements

SOUTHERN COMPANY GAS
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.
SOUTHERN COMPANY GAS
 
 
By:
Kimberly S. Greene
 
Chairman, President, and Chief Executive Officer
 
 
By:
/s/Melissa K. Caen
 
(Melissa K. Caen, Attorney-in-fact)
 
 
Date:
February 19, 2019
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.
 
Kimberly S. Greene
Chairman, President, and Chief Executive Officer
(Principal Executive Officer)
 
 
 
 
 
 
 
Daniel S. Tucker
Executive Vice President, Chief Financial Officer, and Treasurer
(Principal Financial Officer)
 
 
 
 
 
 
 
Grace A. Kolvereid
Senior Vice President and Comptroller
(Principal Accounting Officer)
 
 
 
Directors:
 
 
Sandra N. Bane
Thomas D. Bell, Jr.
Charles R. Crisp
Brenda J. Gaines
John E. Rau
James A. Rubright
 
 
By:
 
/s/Melissa K. Caen
 
 
(Melissa K. Caen, Attorney-in-fact)
Date: February 19, 2019


Supplemental Information to be Furnished with Reports Filed Pursuant to Section 15(d) of the Act by Registrants Which Have Not Registered Securities Pursuant to Section 12 of the Act:

Southern Company Gas is not required to send an annual report or proxy statement to its sole shareholder and parent company, The Southern Company, and will not prepare such a report after filing this Annual Report on Form 10-K for fiscal year 2018 . Accordingly, Southern Company Gas will not file an annual report with the Securities and Exchange Commission.




Exhibit 2(a)3

AMENDMENT NO. 1 TO STOCK PURCHASE AGREEMENT
This AMENDMENT NO. 1 (this “ Amendment ”) is made as of January 1, 2019, and is entered into by and between The Southern Company, a Delaware corporation (“ Seller ”), 700 Universe, LLC, a Delaware limited liability company (“ Purchaser ”), and NextEra Energy, Inc., a Florida corporation (“ Parent ”). Capitalized terms used and not otherwise defined herein shall have the meanings given such terms in the Stock Purchase Agreement, dated as of May 20, 2018, by and between the Seller, Purchaser and Parent (the “ Purchase Agreement ”).
WHEREAS, the Parties desire to amend the Purchase Agreement as set forth herein.
NOW, THEREFORE, in consideration of the mutual promises and agreements set forth herein, the Parties agree as follows:
1.1      Exhibit D attached hereto shall be added as a new Exhibit D to the Purchase Agreement.
1.2      Schedule I to the Purchase Agreement is deleted in its entirety and replaced with Schedule I attached hereto.
1.3      Schedule II attached hereto shall be added as a new Schedule II to the Purchase Agreement.
1.4      The definitions of “CapEx Shortfall Amount”, “CapEx Tables”, “Elapsed Portion”, “Estimated CapEx Shortfall Amount”, “Indebtedness” and “Purchase Price” in Section 1.1 of the Purchase Agreement shall be deleted in their entirety.
1.5      The following definitions shall be added to Section 1.1 of the Purchase Agreement in the appropriate alphabetical locations:
CapEx Amount ” shall mean the actual amount spent by the Company on its capital expenditures (including up to $9 million in costs of removal related to Hurricane Michael) during the year ended December 31, 2018.
CapEx Tables ” shall mean the tables setting forth the monthly and cumulative capital expenditure targets for 2018 and 2019, set forth in Section 5.1(a)(iii)(y)(I) of the Seller Disclosure Letter .
Elapsed Portion ” shall mean, with respect to the month during which the Closing Date occurs, the number of days elapsed during such month through (and including) the Closing Date divided by the total number of calendar days in such month.
Estimated CapEx Adjustment Amount ” shall mean the amount, which may be positive or negative, equal to (a) the Capex Amount set forth in the Estimated Closing Statement minus (b) the Cumulative CapEx Target.
Estimated Recoverable Costs Amount ” shall mean the Recoverable Costs Amount set forth in the Estimated Closing Statement.




Final CapEx Adjustment Amount ” shall mean an amount, which may be positive or negative, equal to (a) the CapEx Amount set forth in the Final Closing Statement minus (b) the Cumulative CapEx Target.
Holdback Amount ” means an amount equal to $75,000,000.
Hurricane Michael Condition ” shall mean the execution and delivery of an Amended and Restated Operating Agreement between the Company and Mississippi Power Company, with respect to Plant Daniel in accordance with that certain Plant Daniel Transition Agreement, dated as of January 1, 2019, by and among Seller, Purchaser and Parent, in such form and substance as is reasonably satisfactory to each of Seller, Parent and Purchaser in all material respects.
Indebtedness ” shall mean, with respect to a Person, without duplication, and determined in each case in accordance with the Accounting Principles: (a) any indebtedness for borrowed money, whether current, short-term or long-term, secured or unsecured, including obligations evidenced by a note, bond, debenture or similar instruments; (b) any obligations in respect of interest rate hedging arrangements; (c) any obligations in respect of letters of credit or bank guarantees; (d) any obligations issued or assumed as the deferred purchase price of any property or services (other than trade credit incurred in the ordinary course of business); and (e) any guarantee by such Person of any obligations of another Person of the types described in the foregoing clauses (a) through (d). For the avoidance of doubt, “Indebtedness” of the Company shall include any such items attributable to Hurricane Michael.
Michael Cost Event ” shall mean (a) a full evidentiary hearing and decision on the merits by the FPSC on the Michael Petition or (b) the approval by the FPSC of any settlement agreement solely related to the Company’s costs attributable to Hurricane Michael entered into by the Company in good faith.
Purchase Price ” shall mean the aggregate amount determined pursuant to Section ‎‎2.2(a) through (e) (as it may be adjusted pursuant to Section ‎2.7 ).
Recoverable Costs Amount ” shall mean the amount of the costs incurred by the Company prior to the Closing that are attributable to Hurricane Michael and qualify for recovery pursuant to Section 7 of the Company’s Stipulation and Settlement Agreement dated March 20, 2017 with the FPSC and FPSC Rule 25-6.0143, as calculated in accordance with the principles set forth on Schedule II . In calculating the Recoverable Costs Amount, (a) there will first be a downward adjustment to reflect the tax benefits to Seller derived from booking the applicable losses attributable to Hurricane Michael, calculated using a 21% U.S. federal corporate tax rate (19.845% net of the federal deduction for state taxes) and a 5.5% Florida state corporate income tax rate; then (b) a discount rate of 5.5% per annum will be applied to account for the timing of recoveries to the Company, discounting payments received (on an after-tax basis) on a monthly basis as if all payments received in any month were received on the last day of such month. An example calculation of the Recoverable Costs Amount (representing the Recoverable Costs

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Amount estimated as of the Closing), applying the principles set forth on Schedule II , is attached hereto as Exhibit D .
1.6      The following definitions shall be added to Section 1.2 of the Purchase Agreement in the appropriate alphabetical locations:
Disallowed Costs
2.9
Independent Expert
2.6(c)
Michael Petition
5.21
PPP Amount
6.2(e)
1.7      Section 2.2 of the Purchase Agreement is deleted in its entirety and replaced with the following:
2.2.     Closing Payment . In consideration for the Shares, at the Closing, Purchaser shall, and Parent shall cause Purchaser to, deliver to Seller (and/or one or more of Seller’s designees), in cash, an aggregate of (a) $5,750,000,000.00, plus (b) the Estimated Working Capital Adjustment Amount, if any, plus (c) the Estimated CapEx Adjustment Amount, if any, less (d) the amount, if any, of Indebtedness of the Company set forth in the Estimated Closing Statement, plus (e) the Estimated Recoverable Costs Amount (the amounts in (b), (c), (d) and (e), together, the “ Closing Payment Adjustments ”) less (f) the Holdback Amount.
1.8      Section 2.3(a) of the Purchase Agreement is deleted in its entirety and replaced with the following:
(a)    The Closing shall take place at the offices of Jones Day, 1420 Peachtree Street, Atlanta, Georgia 30309, at 12:01 a.m. Central Time on January 1, 2019 (subject to the fulfillment or, to the extent permitted by applicable Law, waiver of the conditions set forth in Article VIII that by their nature are to be fulfilled or, to the extent permitted by applicable Law, waived on the Closing Date) (the “ Closing Date ”). For the avoidance of doubt, the Closing shall be deemed to have occurred at 12:01 a.m. Central Time on the Closing Date.
1.9      Section 2.4(a) of the Purchase Agreement is deleted in its entirety and replaced with the following:
(a)    Unless the Parties otherwise agree, not less than five Business Days prior to the anticipated Closing Date, Seller shall provide Purchaser with a statement with a written estimate of each of (i) Working Capital, (ii) Indebtedness of the Company, (iii) the CapEx Amount and (iv) the Recoverable Costs Amount, in each case as of the Closing (the “ Estimated Closing Statement ”), which shall be accompanied by a notice that sets forth (A) Seller’s determination of the Closing Payment Adjustments and the Purchase Price after giving effect to the Closing Payment Adjustments and (B) the account or accounts to which Purchaser shall transfer the Purchase Price pursuant to Section ‎‎2.3 . For the avoidance of doubt, the estimate of the Indebtedness of the Company as of the Closing set forth on the Estimated Closing Statement shall give effect to the repayment of Repayment

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Debt pursuant to Section ‎5.16 , which repayment shall have been completed at or prior to the Closing.
1.10      Section 2.5(a) of the Purchase Agreement is deleted in its entirety and replaced with the following:
(a)    Within 90 days after the Closing Date, Purchaser shall prepare in good faith and deliver to Seller statements of (i) Working Capital, (ii) Indebtedness of the Company, (iii) the CapEx Amount and (iv) the Recoverable Costs Amount, in each case as of the Closing (collectively, the “ Initial Closing Statement ”). The Initial Closing Statement shall be prepared in accordance with the Accounting Principles and in accordance with GAAP, in each case applied consistently with their application in connection with the preparation of the Company Financial Statements.
1.11      Sections 2.5(b) and (c) of the Purchase Agreement are deleted in their entirety and replaced with the following:
(b)    Following the Closing through the date that the Final Closing Statement becomes final and binding (or, if a later date is reasonably requested by a Party with respect to such Party’s accounting or regulatory requirements, including for the avoidance of doubt any preparation of filings to be made with FERC, such later requested date), each Party and its Affiliates and representatives shall be permitted to access and review the books, records and work papers of the other Parties relating to the Company (including pre-Closing transactional data), and the non-requesting Party shall, and shall cause its Affiliates (including the Company) and its and their respective employees, accountants and other representatives to, cooperate with and assist the requesting Party and its Affiliates and representatives in connection with such review, including by providing access to such books, records and work papers and making available personnel to the extent reasonably requested; provided , that the accountants of the non-requesting Party and its Affiliates shall not be obliged to make any books, records or work papers available to the requesting Party and its Affiliates except in accordance with such accountant’s normal disclosure procedures and then only after the requesting Party or its Affiliate, as applicable, has signed a customary agreement relating to such access to books, records and work papers.
(c)    Purchaser agrees that, following the Closing through the date that the Final Closing Statement becomes final and binding, it will not take or permit to be taken any actions with respect to any accounting books, records, policies or procedures on which the Company Financial Statements or the Initial Closing Statement is based, or on which the Final Closing Statement is to be based, that would impede or delay the determination of the amount of Working Capital and Indebtedness of the Company as of the Closing, the CapEx Amount or the Recoverable Costs Amount or the preparation of any Notice of Disagreement or the Final Closing Statement in the manner and utilizing the methods provided by this Agreement.
1.12      Sections 2.6(c), (d) and (e) of the Purchase Agreement are deleted in their entirety and replaced with the following:

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(c)    If, at the end of the Resolution Period, Seller and Purchaser have been unable to resolve any differences that they may have with respect to the matters specified in the Notice of Disagreement, Seller and Purchaser shall submit all matters that remain in dispute with respect to the Notice of Disagreement to Grant Thornton LLP (the “ Independent Accounting Firm ”) or, if the dispute is with respect to the Recoverable Costs Amount, to a mutually agreed upon independent expert (the “ Independent Expert ”). Within 30 days after submission of such matters to the Independent Accounting Firm or Independent Expert, as applicable, such firm or expert shall make a final determination in accordance with the terms and definitions of this Agreement (and the Accounting Principles or, if the dispute is with respect to the Recoverable Costs Amount, the principles set forth in Schedule II ) based solely on the written submissions of the Parties, binding on the Parties, of the appropriate amount of each of the matters that remain in dispute as indicated in the Notice of Disagreement that Seller and Purchaser have submitted to the Independent Accounting Firm or the Independent Expert. With respect to each disputed matter, such determination, if not in accordance with the position of either Seller or Purchaser, shall not be in excess of the higher, or less than the lower, of the amounts advocated by Seller in the Notice of Disagreement or by Purchaser in the Initial Closing Statement with respect to such disputed matter. The Independent Accounting Firm and Independent Expert, as applicable, shall not review or make any determination with respect to any matter other than the matters that remain in dispute as indicated in the Notice of Disagreement. The statements of (i) Working Capital, (ii) Indebtedness of the Company, (iii) the CapEx Amount and (iv) the Recoverable Costs Amount that are final and binding on the Parties, as determined either through agreement of the Parties pursuant to Section 2.6(a) or Section 2.6(b) or through the action of the Independent Accounting Firm pursuant to this Section 2.6(c) , are referred to as the “ Final Closing Statement .”
(d)     All fees and expenses relating to the work, if any, to be performed by the Independent Accounting Firm or the Independent Expert shall be borne equally by Seller, on the one hand, and Purchaser on the other hand. During the review by the Independent Accounting Firm or the Independent Expert, each of Purchaser and Seller shall, and shall cause its respective Affiliates (including, in the case of Purchaser, the Company) and its and their respective employees, accountants and other representatives to, each make available to the Independent Accounting Firm or the Independent Expert interviews with such personnel, and such information, books and records and work papers, as may be reasonably requested by the Independent Accounting Firm or the Independent Expert to fulfill its obligations under Section 2.6(c) ; provided , that the accountants of Seller or Purchaser shall not be obliged to make any work papers available to the Independent Accounting Firm or Independent Expert except in accordance with such firm’s or expert’s normal disclosure procedures and then only after such firm or expert has signed a customary agreement relating to such access to work papers. In acting under this Agreement, the Independent Accounting Firm or Independent Expert shall act as an expert and not an arbitrator.
(e)    The process set forth in Section 2.5 and this Section 2.6 shall be the sole and exclusive remedy of any of the Parties and their respective Affiliates for any disputes related to the Closing Payment Adjustments, the Post-Closing Adjustment and the calculations and amounts on which they are based or set forth in the related statements and

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notices delivered in connection therewith. For the avoidance of doubt, the calculations to be made pursuant to Section 2.5 and this Section 2.6 and the Closing Payment Adjustments and Post-Closing Adjustment are not intended to be used to adjust for errors or omissions that may be found with respect to the Company Financial Statements or any inconsistencies between the Company Financial Statements or the Accounting Principles, on the one hand, and GAAP, on the other hand. After the determination of the Final Closing Statement, but subject to Section 2.9 , none of the Parties shall have the right to make any claim based upon the preparation of the Final Closing Statement or the calculation of Working Capital or Indebtedness as of the Closing or the CapEx Amount (even if subsequent events or subsequently discovered facts would have affected the determination of the Final Closing Statement or the calculations of Working Capital, Indebtedness or the CapEx Amount had such subsequent events or subsequently discovered facts been known at the time of the determination of the Final Closing Statement), or the Recoverable Costs Amount.
1.13      Section 2.7 of the Purchase Agreement is deleted in its entirety and replaced with the following:
2.7     Post-Closing Adjustment . The “ Post-Closing Adjustment ” shall be equal to (a)(i) the Final Working Capital Adjustment Amount minus (ii) the Estimated Working Capital Adjustment Amount minus (b) (i) the amount of Indebtedness of the Company set forth in the Final Closing Statement minus (ii) the amount of Indebtedness of the Company set forth in the Estimated Closing Statement plus (c)(i) the Final CapEx Adjustment Amount minus (ii) the Estimated CapEx Adjustment Amount plus (d)(i) the Recoverable Costs Amount set forth in the Final Closing Statement minus (ii) the Estimated Recoverable Costs Amount. If the Post-Closing Adjustment is a positive amount, then Purchaser shall, and Parent shall cause Purchaser to, pay in cash to Seller (or one or more Affiliates designated by Seller) the amount of the Post-Closing Adjustment. If the Post-Closing Adjustment is a negative amount, then Seller (or an Affiliate designated by Seller) shall pay in cash to Purchaser the absolute value of the amount of the Post-Closing Adjustment. Any such payment pursuant to this Section 2.7 shall be made within ten Business Days after the determination of the Final Closing Statement by wire transfer of immediately available funds. The Parties acknowledge and agree that the Closing Payment Adjustments pursuant to Section 2.2 and the Post-Closing Adjustment pursuant to this Section 2.7 (and other applicable provisions of this Agreement) will be read to ensure that (i) there is no benefit to Seller as a result of Hurricane Michael and (ii) there is no duplication of the amounts set forth above in this Agreement with respect to Hurricane Michael.
1.14      The following shall be added to the Purchase Agreement as Section 2.8 and Section 2.8 of the Purchase Agreement shall be renumbered as Section 2.9:
2.8     Holdback . Within five Business Days after the satisfaction of the Hurricane Michael Condition, Purchaser shall, and Parent shall cause Purchaser to, deliver to Seller (or to any Affiliate designated by Seller), by wire transfer of immediately available funds an amount equal to the Holdback Amount.
1.15      The following shall be added to the Purchase Agreement as a new Section 2.10:

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2.10     Determination of Disallowed Costs . To the extent that any portion of the Recoverable Costs Amount set forth in the Final Closing Statement is disallowed pursuant to a Michael Cost Event (any such costs, the “ Disallowed Costs ”), within 60 days of such Michael Cost Event, Purchaser shall prepare in good faith and deliver to Seller a statement setting forth Purchaser’s calculation of the Disallowed Costs. Following the delivery of such statement, for a period of 30 days thereafter, Seller and its Affiliates and representatives shall be permitted to access and review the books, records and work papers of the Company related to Purchaser’s calculation of the Disallowed Costs, and Purchaser shall, and shall cause its Affiliates (including the Company) and its and their respective employees, accountants and other representatives to, cooperate with and assist Seller and its Affiliates and representatives in connection with such review, including by providing access to such books, records and work papers and making available personnel to the extent reasonably requested; provided, that the accountants of Purchaser and its Affiliates shall not be obliged to make any books, records or work papers available to Seller and its Affiliates except in accordance with such accountant’s normal disclosure procedures and then only after Seller or its Affiliate, as applicable, has signed a customary agreement relating to such access to books, records and work papers. Following such 30 day review period, the Parties will negotiate in good faith to resolve any disputes with respect to Purchaser’s calculation of the Disallowed Costs and, if any such disputes have not been resolved within an additional 15 days thereafter, then the provisions of Sections 2.6(c) and (d) shall apply to such determination, mutatis mutandis . Within ten Business Days of the final determination of the Disallowed Costs in accordance with this Section 2.9 , Seller shall pay 80% of the amount of such Disallowed Costs by wire transfer of immediately available funds to an account designated by Purchaser.
1.16      The following shall be added to the Purchase Agreement as a new Section 5.21:
5.21     FPSC Petition Filing . As soon as reasonably practicable after the Closing, Parent and Purchaser shall cause the Company to file a petition with the FPSC (as amended, modified or supplemented from time to time, the “ Michael Petition ”) pursuant to Section 7 of the Company’s Stipulation and Settlement Agreement, dated March 20, 2017, for the recovery of the amount of costs attributable to Hurricane Michael that qualify for recovery pursuant to such Section 7 and FPSC Rule 25-6.0143, which Petition shall request that such amounts be collected from customers over such period as would result in an increase in monthly residential customer bills in an amount equal to $8.00 per 1,000 kilowatt hour. Prior to filing the Michael Petition, Parent and Purchaser shall give Seller a reasonable opportunity to review and comment upon the Michael Petition and shall consider in good faith any such comments submitted by Seller.
1.17      The first clause of Section 6.1(a) of the Purchase Agreement shall be revised to read as follows: “For a period commencing on the Closing Date and expiring on December 31, 2020 (the “ Continuation Period ”)”.
1.18      Section 6.2(e) of the Purchase Agreement is deleted in its entirety and replaced with the following:

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(e)     Incentive Program . On or prior to February 25, 2019, Seller (or one of its Affiliates) shall pay to Parent (or one of its Affiliates) all amounts of compensation accrued, but not paid, to any Company Employee through the Closing Date with respect to any annual cash performance pay program of the Company, Seller, or an Affiliate of Seller (the “ PPP Amount ”). In addition, on or prior to February 25, 2019, Seller shall provide Parent a schedule of the amounts to be paid to each applicable Company Employee. On or about the date Seller and its Affiliates make payments to the employees of Seller and its Affiliates with respect to any annual cash performance pay programs of Seller or an Affiliate of Seller, Parent or one of its Affiliates shall pay the PPP Amount to the applicable Company Employees. Other than the commitment to pay the PPP Amount pursuant to this Section 6.2(e) , Parent and its Affiliates (including the Company and its Subsidiaries) shall have no Liabilities in respect of the annual cash performance pay programs of Seller or its Affiliates, all of which shall be retained by Seller or its Affiliates (other than the Company and its Subsidiaries).
1.19      The first clause of Section 10.5 of the Purchase Agreement shall be revised to read as follows: “Except with respect to the matters covered by Sections ‎‎2.5 through ‎‎2.7 and 2.9 (which shall be governed exclusively by such sections) and with respect to any matter relating to Taxes (which shall be governed exclusively by ‎Article ‎VII ) and except for the Parties’ right to seek and obtain any equitable relief pursuant to Section ‎11.13 ”.
1.20      This Amendment (as well as any claim or controversy arising out of or relating to this Agreement or the transactions contemplated hereby) shall be governed by and construed in accordance with the Laws of the State of Delaware, without regard to the conflicts of laws rules thereof that would otherwise require the laws of another jurisdiction to apply.
1.21      This Amendment may be executed in multiple counterparts (each of which will be deemed an original, but all of which together will constitute one and the same instrument). Signatures to this Agreement transmitted by facsimile transmission, by electronic mail in “portable document format” (.pdf) form, or by any other electronic means intended to preserve the original graphic and pictorial appearance of a document, will have the same effect as physical delivery of the paper document bearing the original signature.
1.22      This Amendment will not constitute an amendment, modification or waiver of any other provision of the Purchase Agreement not expressly referenced herein. Except as specifically amended hereby, the text of the Purchase Agreement and the Schedules and Exhibits thereto will remain unchanged and in full force and effect.
[ Remainder of page intentionally left blank ]


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IN WITNESS WHEREOF, this Amendment has been signed by or on behalf of Seller, Purchaser and Parent as of the date first set forth above.
 
700 UNIVERSE, LLC
 
 
 
 
By:
/s/Mark E Hickson
 
 
Name:   Mark E. Hickson
 
 
Title:     Vice President
 
 
 
 
 
 
 
NEXTERA ENERGY, INC.
 
 
 
 
By:
/s/Mark E Hickson
 
 
Name:   Mark E. Hickson
 
 
Title:     Executive Vice President


[Signature Page to Stock Purchase Agreement Amendment No. 1 – Electric]





 
THE SOUTHERN COMPANY
 
 
 
 
By:
/s/James Y. Kerr II
 
Name:  James Y. Kerr II
 
Title:   Executive Vice President, Chief Legal Officer and Chief Compliance Officer



[Signature Page to Stock Purchase Agreement Amendment No. 1 – Electric]

Exhibit 3(a)1

RESTATED

CERTIFICATE OF INCORPORATION

OF

THE SOUTHERN COMPANY

The Southern Company, a corporation organized and existing under and by virtue of the General Corporation Law of the State of Delaware (the “Delaware General Corporation Law”), does hereby certify that:
I.   The present name of the corporation is The Southern Company.  The corporation was incorporated under the name “Southeastern Power Holding Corp.” by the filing of its original Certificate of Incorporation with the Secretary of State of the State of Delaware (“Delaware Secretary of State”) on November 9, 1945. A Certificate of Amendment was filed with the Delaware Secretary of State on January 21, 1946, changing the name of the corporation to The Southern Company.
II.  This Restated Certificate of Incorporation only restates and integrates and does not further amend the provisions of the Certificate of Incorporation of this corporation as heretofore amended or supplemented and there is no discrepancy between those provisions and the provisions of this Restated Certificate of Incorporation. This Restated Certificate of Incorporation has been duly adopted by the Board of Directors of the corporation in accordance with Section 245 of the Delaware General Corporation Law. The text of the Certificate of Incorporation is hereby restated and integrated to read in its entirety as follows:

FIRST : The name of the corporation is
THE SOUTHERN COMPANY



SECOND : The name of the county and the city, town or place within the county in which its principal office or place of business is to be located in the State of Delaware, and the street and number of such principal office or place of business is No. 1209 Orange Street, in the City of Wilmington, County of New Castle 19801. The name of its resident agent is The Corporation Trust Company and the address by street and number of said resident agent is No. 1209 Orange Street, Wilmington, Delaware 19801.
THIRD : The nature of the business of the corporation, or objects or purposes proposed to be transacted, promoted or carried on by it are:
(1) To acquire and hold the securities of electric power and light and gas companies and other public utility companies and companies owning the stocks or securities of public utility companies.
(2)    To invest and deal with the moneys of the corporation in any manner, and to acquire by purchase, by the exchange of stock or other securities of the corporation, by subscription or otherwise and to invest in, to hold for investment or for any other purpose and to deal in and to use, sell, pledge or otherwise dispose of any stocks, bonds, notes, debentures and other securities and obligations of any Government, State, municipality or corporation or association or partnership, domestic or foreign, (including without prejudice to the generality of the foregoing the companies described in paragraph 1 above), and while owner of any such stocks, bonds, notes, debentures or other securities or obligations, to exercise all the rights, powers and privileges of ownership, including among other things the right to vote thereon for any and all purposes.
(3)    To aid in any lawful manner by loan, subsidy, guaranty or otherwise, any company whose stock, bonds, notes, debentures or other securities or obligations are held or controlled

2



directly or indirectly by the corporation, and to do any and all lawful acts or things necessary or advisable to protect, preserve, improve or enhance the value of any such stocks, bonds, notes, debentures or other securities or obligations.
(4)    To guarantee and to assume the payment of any dividends on any shares of the capital stock of any company in which the corporation may either directly or indirectly have an interest as stockholder or otherwise, and to assume and to guarantee by endorsement or otherwise, the payment of the principal of and the interest on bonds, notes or other obligations created or to be created by any such company.
(5)    To acquire, to develop, to improve, to sell, to assign, to transfer, to convey, to lease, to sublease, to pledge and otherwise to alienate and dispose of and to mortgage or otherwise encumber real property situate in any part of the world and the fixtures and personal property incident thereto or connected therewith.
(6)    To acquire, to hold, to own, to make, to dispose of and generally to deal in grants, concessions, franchises, rights of way and contracts of every kind from or with any person, firm, association, corporation, private, public or municipal, or body politic, and from or with the government or public authorities of the United States, or of any State, territory, possession or dependency thereof, or from or with the District of Columbia, or from or with any foreign government; to cause to be formed, to promote and to aid in any way the formation of any corporation or association, domestic or foreign.
(7)    To make and enter into all manner and kinds of contracts, agreements and obligations for the purchasing, acquiring, holding, using, dealing in, selling or otherwise disposing of any and all kinds of property, real and personal.

3



(8)    To borrow money, to issue bonds, debentures, notes or other obligations secured or unsecured of the corporation; to secure the same by mortgage or mortgages or deed or deeds of trust or pledge or other lien upon any or all of the property, rights, privileges and franchises of the corporation wheresoever situate, acquired or to be acquired; to confer upon the holders of any debentures, bonds, notes or other obligations of the corporation secured or unsecured the right to convert the same into any class of stock of any series of the corporation now or hereafter to be issued upon such terms as shall be fixed by the Board of Directors subject to the provisions hereof; to sell, to pledge and otherwise to dispose of any or all bonds, debentures, notes or other obligations of the corporation; to purchase and otherwise to acquire shares of its own capital stock and to hold, to sell, to assign, to transfer and to reissue any or all of such shares; provided that the corporation shall not use its funds or property for the purchase of its own shares of capital stock when such use would cause any impairment of the capital of the corporation, except as such purchase out of capital may be permitted by law, and provided further that shares of its own capital stock owned by the corporation shall not be voted upon directly or indirectly.
(9)    To acquire, to hold, to use, to sell, to assign, to lease, to mortgage and otherwise to dispose of letters patent of the United States or of any other country, patents, patent rights, copyrights, licenses and privileges, inventions, improvements and processes, trade marks and trade names or pending applications therefor, relating to or useful in connection with any business of the corporation or of any other company or association in which the corporation may have an interest directly or indirectly as a stockholder or otherwise.
(10)    To have and to exercise all the powers now or hereafter conferred by the laws of the State of Delaware upon corporations organized under the laws under which the corporation is organized and any and all Acts amendatory thereof and supplemental thereto.

4



(11)    To conduct business in the State of Delaware, other States, the District of Columbia, the territories and colonies of the United States and in foreign countries, and to have one or more offices out of the State of Delaware, as well as within said State, and to hold, purchase, mortgage and convey real and personal property out of the State of Delaware as well as within said State; provided, however, that nothing herein contained shall be deemed to authorize the corporation to construct, maintain or to operate public utilities within the State of Delaware.
(12)    Generally to carry on and undertake any other lawful business of the same general nature, which may from time to time seem to the directors of the corporation capable of being conveniently carried on in connection with the above objects, or calculated directly or indirectly to render valuable or enhance the value of any of the corporation’s properties, privileges or rights.
(13)    Generally to perform any and all acts connected with, arising from or incidental to the business to be carried on by the corporation, and to do all acts necessary and proper for the purposes of its business.
The foregoing clauses shall be construed both as objects and powers; and it is hereby expressly provided that the foregoing enumeration of specific powers shall not be held to limit or restrict in any manner the powers of the corporation, and that the corporation shall possess such incidental powers as are reasonably necessary or convenient for the accomplishment of any of the objects or powers hereinbefore enumerated, either alone or in association with other corporations, associations, firms or individuals, to the same extent and as fully as individuals might or could do as principals, agents, contractors or otherwise.

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FOURTH : The total number of shares of stock which the corporation shall have authority to issue is 1,500,000,000 shares, all of which are to be shares of common stock with a par value of five dollars ($5) each.
FIFTH : The amount of capital with which the corporation will commence business is One Thousand Dollars ($1,000.00).
SIXTH : Intentionally Omitted.
SEVENTH : The corporation is to have perpetual existence.
EIGHTH : The private property of the stockholders shall not be subject to the payment of corporate debts to any extent whatever.
NINTH : The following additional provisions are inserted for the management of the business and for the conduct of the affairs of the corporation and for the creation, definition, limitation and regulation of the powers of the corporation, the directors and the stockholders:
(1) The number of directors of the corporation which shall constitute the whole Board shall be such as from time to time shall be fixed by, or in the manner provided in, the By-Laws, and such number may be altered from time to time in the manner provided in such By-Laws, or by amendment thereof, adopted in the manner provided therein, but such number shall in no case be less than three. Vacancies caused by an increase in the number of directors or otherwise may be filled by the Board of Directors in the manner provided in the By-Laws. Directors need not be stockholders. Any director may be removed at any time with or without cause upon the affirmative vote of the holders of a majority of the stock of the corporation at that time entitled to vote for such director.
(2)    The Board of Directors shall have power from time to time to fix and determine and to vary the amount to be reserved as a working capital of the corporation and, before the payment of

6



any dividends or making any distribution of profits, it may set aside out of the net profits of the corporation such sum or sums as it may from time to time in its absolute discretion think proper whether as a reserve fund to meet contingencies or for the equalizing of dividends or for repairing or maintaining any property of the corporation or for such corporate purposes as the Board shall think conducive to the interests of the corporation, subject only to such limitations as the By-Laws of the corporation may from time to time impose.
(3)    The Board of Directors shall also have power without the assent or vote of the stockholders to fix the times for the declaration and payment of dividends and to make and determine the use and disposition of any surplus or net profits over and above the capital of the corporation.
(4)    The Board of Directors shall also have power to make, alter, amend and repeal the By-Laws of the corporation, subject only to such limitations as the By-Laws of the corporation may from time to time impose.
(5)    The Board of Directors shall also have power to sell, lease or exchange all or substantially all of the property and assets of the corporation, including its good will and corporate franchises, upon such terms and conditions and for such consideration, which may be in whole or in part shares of stock in, and/or other securities of, any other corporation or corporations, as the Board of Directors shall deem expedient and for the best interests of the corporation, when and as authorized by the affirmative vote in favor thereof of the holders of at least a majority of the issued and outstanding capital stock of the corporation having voting powers given at any annual meeting of stockholders or at any special meeting called for that purpose.

7



(6)    Subject to direction by resolution of a majority of the stockholders, the Board of Directors shall have power from time to time to determine whether and to what extent and at what times and places and under what conditions and regulations the accounts and books of the corporation (other than the stock ledger) or any of them, shall be open to the inspection of stockholders; and no stockholder shall have any right to inspect any account or book or document of the corporation except as conferred by statute or authorized by the Board of
Directors or by a resolution of the stockholders.
(7)    A director shall be fully protected in relying in good faith upon the books of account of the corporation or statements prepared by any of its officials as to the value and amount of the assets, liabilities and/or net profits of the corporation, or any other facts pertinent to the existence and amount of surplus or other funds from which dividends might properly be declared and paid.
(8)    A director shall in the performance of his duties be fully protected in relying in good faith upon the books of account or reports made to the corporation by any of its officials, or by an independent public accountant, or by an appraiser selected with reasonable care by the Board of Directors, or in relying in good faith upon other records of the corporation or upon any order of any regulatory body having jurisdiction in the premises.
(9)    The corporation shall be entitled to treat the person in whose name any share, right or option is registered as the owner thereof, for all purposes, and shall not be bound to recognize any equitable or other claim to or interest in such share, right or option on the part of any other person, whether or not the corporation shall have notice thereof, save as may be expressly provided otherwise by the laws of the State of Delaware.
(10)    The Board of Directors, in addition to the powers and authority expressly conferred upon it hereinbefore and by statute and by the By-Laws, is hereby empowered to exercise all

8



such powers as may be exercised by the corporation; subject, nevertheless, to the provisions of the statutes of the State of Delaware, of the Certificate of Incorporation and to any regulations that may from time to time be made by the stockholders, provided that no regulation so made shall invalidate any provision of the Certificate of Incorporation or any prior act of the directors which would have continued valid if such regulation had not been made.
(11)    A director shall not be personally liable for monetary damages to the corporation or its stockholders for breach of fiduciary duty as a director except (a) for any breach of the director’s duty of loyalty to the corporation or its stockholders, (b) for acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law, (c) under section 174 of the General Corporation Law of the State of Delaware or any successor provision, or (d) for any transaction from which the director derived an improper personal benefit.
TENTH : Whenever a compromise or arrangement is proposed between this corporation and its creditors or any class of them and/or between this corporation and its stockholders or any class of them, any court of equitable jurisdiction within the State of Delaware may, on the application in a summary way of this corporation or of any creditor or stockholder thereof, or on the application of any receiver or receivers appointed for this corporation under the provisions of Section 3883 of the Revised Code of 1915 of said State, or on the application of trustees in dissolution or of any receiver or receivers appointed for this corporation under the provisions of Section 43 of the General Corporation Law of the State of Delaware, order a meeting of the creditors or class of creditors, and/or of the stockholders or class of stockholders of this corporation, as the case may be, to be summoned in such manner as the said Court directs. If a majority in number representing three-fourths in value of the creditors or class of creditors, and/or of the stockholders or class of stockholders of this corporation, as the case may be, agree

9



to any compromise or arrangement and to any reorganization of this corporation as consequence of such compromise or arrangement, the said compromise or arrangement and the said reorganization shall, if sanctioned by the Court to which the said application has been made, be binding on all the creditors or class of creditors, and/or on all the stockholders or class of stockholders, of this corporation, as the case may be, and also on this corporation.
ELEVENTH : The corporation reserves the right to increase or decrease its authorized capital stock, or any class or series thereof, or to reclassify the same, and to amend, alter, change or repeal any provision contained in the Certificate of Incorporation or in any amendment thereto, in the manner now or hereafter prescribed by law, and all rights conferred upon stockholders in said Certificate of Incorporation or any amendment thereto are granted subject to this reservation; provided, however, that the corporation shall not, unless authorized by the affirmative vote in favor thereof of the holders of at least two-thirds of the issued and outstanding common stock of the corporation given at any annual meeting of stockholders or at any special meeting called for that purpose, (a) authorize or create any class of stock preferred as to dividends or assets over the common stock or reclassify the common stock or change the issued shares of common stock into the same or a greater or less number of shares of common stock either with or without par value or reduce the par value of the common stock, or (b) amend, alter, change or repeal [Intentionally Omitted], Article Twelfth, this proviso or any provision contained in the Certificate of Incorporation or in any amendment thereto which provides for the vote of the holders of at least two-thirds of the issued and outstanding common stock.
TWELFTH : No stockholder shall be entitled as a matter of right to subscribe for, purchase or receive any shares of the stock or any rights or options of the corporation which it may issue or sell, whether out of the number of shares authorized by this Certificate of

10



Incorporation or by amendment thereof or out of the shares of the stock of the corporation acquired by it after the issuance thereof, nor shall any stockholder be entitled as a matter of right to purchase or subscribe for or receive any bonds, debentures or other obligations which the corporation may issue or sell that shall be convertible into or exchangeable for stock or to which shall be attached or appertain any warrant or warrants or other instrument or instruments that shall confer upon the holder or owner of such obligation the right to subscribe for or purchase from the corporation any shares of its capital stock, but all such additional issues of stock, rights, options, or of bonds, debentures or other obligations convertible into or exchangeable for stock or to which warrants shall be attached or appertain or which shall confer upon the holder the right to subscribe for or purchase any shares of stock may be issued and disposed of by the Board of Directors to such persons and upon such terms as in their absolute discretion they may deem advisable, subject only to such limitations as may be imposed in the Certificate of Incorporation or in any amendment thereto.
IN WITNESS WHEREOF, The Southern Company has caused this Restated Certificate of Incorporation to be executed by its duly authorized officer on this 12 th day of February, 2019.
 
 
 
 
The Southern Company

/s/Myra C. Bierria
 
 
 
By: Myra C. Bierria
 
 
 
 
Title: Secretary
 


11


Exhibit 10(a)21

FIRST AMENDMENT TO THE SOUTHERN COMPANY
DEFERRED COMPENSATION PLAN
WHEREAS, the Board of Directors of Southern Company Services, Inc. heretofore established and adopted the Southern Company Deferred Compensation Plan, as amended and restated effective January 1, 2018 (the “Plan”);
WHEREAS, under Section 8.3 of the Plan, the Benefits Administration Committee (the “Committee”) may amend the Plan, provided the amendment either (a) does not involve a substantial increase in cost to any Employing Company, or (b) is necessary, proper, or desirable in order to comply with applicable laws or regulations enacted or promulgated by any federal or state governmental authority; and
WHEREAS, the Committee, in its settlor capacity, desires to amend the Plan to (i) provide for cessation of active participation for employees of Pivotal Home Solutions, Elizabethtown Gas, Elkton Gas, Florida City Gas, and Southern Power Company who are no longer Employees due to the divestitures that have occurred or will occur during 2018; (ii) provide for full vesting for Elizabethtown Gas and Elkton Gas participants upon the sale of the respective assets of the Elizabethtown Gas and Elkton Gas divisions; and (iii) provide for full vesting for Florida City Gas participants and Southern Power Company participants and transfer of their benefits to the buyer’s nonqualified plan.
NOW, THEREFORE, pursuant to resolutions adopted on August 1, 2018 and October 22, 2018, the Committee herby amends the Plan as follows, effective as specified herein:
1.
The Plan is hereby amended by adding a new Section 4.4 to read as follows:
4.4    Provisions Regarding Divestitures.
(a)    Pivotal Home Solutions.
(1)    Cessation of Active Participation. Effective as of June 4, 2018, (i) Nicor Energy Services Company d/b/a Pivotal Home Solutions will cease to be an affiliated company of Southern Company Gas for purposes of Employing Company status under the Plan; and (ii) Participants who cease to be Employees due to the sale of Nicor Energy Services Company d/b/a Pivotal Home Solutions will cease to be eligible to actively participate in the Plan.
(2)    Payment of Existing Balances. Notwithstanding subsection (1) above, the Accounts of Participants who cease to be Employees due to the sale of Nicor Energy Services Company d/b/a Pivotal Home Solutions will remain in the Plan until fully distributed according to the Plan’s terms.






(b)    Elizabethtown Gas and Elkton Gas.
(1)    Cessation of Active Participation. Effective as of July 1, 2018, Participants who cease to be Employees due to the sale of certain assets of Pivotal Utility Holdings, Inc. ( i.e. , the Elizabethtown Gas and Elkton Gas divisions) will cease to be eligible to actively participate in the Plan.
(2)    Payment of Existing Balances. Notwithstanding subsection (1) above, the Accounts of Participants who cease to be Employees due to the sale of certain assets of Pivotal Utility Holdings, Inc. ( i.e. , the Elizabethtown Gas and Elkton Gas divisions) will remain in the Plan until fully distributed according to the Plan’s terms.
(3)    Vesting Acceleration. Effective as of July 1, 2018, Participants who cease to be Employees due to the sale of the assets of Pivotal Utility Holdings, Inc. ( i.e. , the Elizabethtown Gas and Elkton Gas divisions) will be deemed to be fully vested for all purposes hereunder.
(c)    Florida City Gas.
(1)    Cessation of Active Participation. Effective as of July 29, 2018, (i) Pivotal Utility Holdings, Inc. will cease to be an affiliated company of Southern Company Gas for purposes of Employing Company status under the Plan; and (ii) Participants who cease to be Employees due to the sale of the stock of Pivotal Utility Holdings, Inc. (holding the Florida City Gas division) will cease to be eligible to actively participate in the Plan.
(2)    Vesting Acceleration. Effective as of July 29, 2018, Participants who cease to be Employees due to the sale of the stock of Pivotal Utility Holdings, Inc. ( i.e. , the Florida City Gas division), or who are included on the list of “Pension Participants” under the Stock Purchase Agreement dated as of May 20, 2018, providing for the sale of the stock of Pivotal Utility Holdings, Inc., will be deemed to be fully vested for all purposes hereunder.
(3)    Spinoff to Buyer’s Plan. Effective as of July 29, 2018, all liabilities for the payment of benefits accrued under the Plan with respect to Participants who cease to be Employees due to the sale of the stock of Pivotal Utility Holdings, Inc. ( i.e. , the Florida City Gas division), or who are included on the list of “Pension Participants” under the Stock Purchase Agreement dated as of May 20, 2018, providing for the sale of the stock of Pivotal Utility Holdings, Inc., will be transferred to one or more nonqualified deferred compensation plans maintained by NextEra Energy, Inc.
(d)    Southern Power Company.
(1)    Cessation of Participation. Effective as of December 4, 2018, Participants who cease to be Employees due to the sale of Southern Power Company’s equity interests in Southern Company – Florida LLC (holding the Stanton Facility) and

2





Southern Company – Oleander LLC (holding the Oleander Facility) will cease to be eligible to actively participate in the Plan.
(2)    Vesting Acceleration. Effective as of December 4, 2018, Participants who cease to be Employees due to the sale of Southern Power Company’s equity interests in Southern Company – Florida LLC (holding the Stanton Facility) and Southern Company – Oleander LLC (holding the Oleander Facility) will be deemed to be fully vested for all purposes hereunder
(3)    Spinoff to Buyer’s Plan. Effective as of December 4, 2018, all liabilities for the payment of benefits accrued under the Plan with respect to Participants who cease to be Employees due to the sale of Southern Power Company’s equity interests in Southern Company – Florida LLC (holding the Stanton Facility) and Southern Company – Oleander LLC (holding the Oleander Facility) will be transferred to one or more nonqualified deferred compensation plans maintained by NextEra Energy, Inc.
2.
Except as amended herein by this First Amendment, the Plan shall remain in full force and effect.


IN WITNESS WHEREOF , the Committee, through its authorized representative, has adopted this First Amendment to the Southern Company Deferred Compensation Plan, as amended and restated as of January 1, 2018, this 7th day of December, 2018.

 
BENEFITS ADMINISTRATION COMMITTEE



By:
/s/James M. Garvie



Name:
James M. Garvie



Its:
Chairperson


3




Exhibit 10(a)22

SECOND AMENDMENT TO THE SOUTHERN COMPANY
DEFERRED COMPENSATION PLAN
WHEREAS, the Board of Directors of Southern Company Services, Inc. heretofore established and adopted the Southern Company Deferred Compensation Plan, as amended and restated effective January 1, 2018 (the “Plan”);
WHEREAS, under Section 8.3 of the Plan, the Benefits Administration Committee (the “Committee”) may amend the Plan, provided the amendment either (a) does not involve a substantial increase in cost to any Employing Company, or (b) is necessary, proper, or desirable in order to comply with applicable laws or regulations enacted or promulgated by any federal or state governmental authority; and
WHEREAS, the Committee, in its settlor capacity, desires to amend the Plan to clarify certain provisions relating to business divestitures that occurred during 2018 and to provide for cessation of participation for Gulf Power Company Participants due to the divestiture that occurred on January 1, 2019 and to provide for full vesting for such Participants and transfer of their benefits to the buyer’s nonqualified plan.
NOW, THEREFORE, pursuant to resolutions adopted on August 1, 2018 and October 22, 2018, the Committee herby amends the Plan as follows, effective as specified herein:
1.
The Plan is hereby amended by deleting paragraphs (c) and (d) of Section 4.4 and replacing them with the following:
(c)    Florida City Gas.
(1)    Cessation of Participation. Effective as of July 29, 2018, (i) Pivotal Utility Holdings, Inc. will cease to be an affiliated company of Southern Company Gas for purposes of determining Employing Company status under the Plan; and (ii) Participants who cease to be Employees due to the sale of the stock of Pivotal Utility Holdings, Inc. (holding the Florida City Gas division), or who are included on the list of “Pension Participants” under the Stock Purchase Agreement dated as of May 20, 2018, providing for the sale of the stock of Pivotal Utility Holdings, Inc. will cease to be eligible to participate in the Plan.
(2)    Vesting Acceleration. Effective as of July 29, 2018, Participants who cease to be Employees due to the sale of the stock of Pivotal Utility Holdings, Inc. (holding the Florida City Gas division) will be deemed to be fully vested for all purposes hereunder.
(3)    Spinoff to Buyer’s Plan. Effective as of July 29, 2018, all liabilities for the payment of benefits accrued under the Plan with respect to Participants who cease to be Employees due to the sale of the stock of Pivotal Utility Holdings, Inc. (holding the Florida City Gas division), or who are included on the list of “Pension Participants” under the Stock Purchase Agreement dated as of May 20, 2018, providing for the sale of the stock




of Pivotal Utility Holdings, Inc. will be transferred to one or more nonqualified deferred compensation plans maintained by NextEra Energy, Inc.
(d)    Southern Power Company.
(1)    Cessation of Participation. Effective as of December 4, 2018, Participants who cease to be Employees due to the sale of Southern Power Company’s equity interests in Southern Company – Florida LLC (holding the Stanton Facility) and Southern Company – Oleander LLC (holding the Oleander Facility), or who are included on the list of “Pension Participants” under the Equity Interest Purchase Agreement dated as of May 20, 2018, providing for the sale of the sale of such equity interests of Southern Company – Florida LLC (holding the Stanton Facility) and Southern Company – Oleander LLC (holding the Oleander Facility) will cease to be eligible to participate in the Plan.
(2)    Vesting Acceleration. Effective as of December 4, 2018, Participants who cease to be Employees due to the sale of Southern Power Company’s equity interests in Southern Company – Florida LLC (holding the Stanton Facility) and Southern Company – Oleander LLC (holding the Oleander Facility) will be deemed to be fully vested for all purposes hereunder.
(3)    Spinoff to Buyer’s Plan. Effective as of December 4, 2018, all liabilities for the payment of benefits accrued under the Plan with respect to Participants who cease to be Employees due to the sale of Southern Power Company’s equity interests in Southern Company – Florida LLC (holding the Stanton Facility) and Southern Company – Oleander LLC (holding the Oleander Facility), or who are included on the list of “Pension Participants” under the Equity Interest Purchase Agreement dated as of May 20, 2018, providing for the sale of the sale of such equity interests of Southern Company – Florida LLC (holding the Stanton Facility) and Southern Company – Oleander LLC (holding the Oleander Facility) will be transferred to one or more nonqualified deferred compensation plans maintained by NextEra Energy, Inc.
(e)    Gulf Power Company.
(1)    Cessation of Participation. Effective as of January 1, 2019, (i) Gulf Power Company will cease to be an Employing Company under the Plan; and (ii) Participants who cease to be Employees due to the sale of Gulf Power Company, or who are included on the list of “Pension Participants” under the Stock Purchase Agreement dated as of May 20, 2018, providing for the sale of Gulf Power Company will cease to be eligible to participate in the Plan.
(2)    Vesting Acceleration. Effective as of January 1, 2019, Participants who cease to be Employees due to the sale of Gulf Power Company will be deemed to be fully vested for all purposes hereunder.
(3)    Spinoff to Buyer’s Plan. Effective as of January 1, 2019, all liabilities for the payment of benefits accrued under the Plan with respect to Participants who cease to be Employees due to the sale of Gulf Power Company, or who are included on the list of “Pension Participants” under the Stock Purchase Agreement dated as of May

2




20, 2018, providing for the sale of Gulf Power Company will be transferred to one or more nonqualified deferred compensation plans maintained by NextEra Energy, Inc.
2.
The Plan is hereby amended by deleting Gulf Power Company from the list of Employing Companies in Appendix A.
3.
Except as amended herein by this Second Amendment, the Plan shall remain in full force and effect.


IN WITNESS WHEREOF , the Committee, through its authorized representative, has adopted this Second Amendment to the Southern Company Deferred Compensation Plan, as amended and restated as of January 1, 2018, this 29th day of January, 2019.

 
BENEFITS ADMINISTRATION COMMITTEE



By:
/s/James M. Garvie



Name:
James M. Garvie



Its:
Chairperson


3



Exhibit 10(a)23

FOURTH AMENDMENT TO THE SOUTHERN COMPANY
SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN
WHEREAS, the Board of Directors of Southern Company Services, Inc. heretofore established and adopted The Southern Company Supplemental Executive Retirement Plan, as amended and restated effective June 30, 2016 (the “Plan”);
WHEREAS , under Section 6.2 of the Plan, the Benefits Administration Committee (the “Committee”) may amend the Plan, provided the amendment either (a) does not involve a substantial increase in cost to any Affiliated Employer, or (b) is necessary, proper, or desirable in order to comply with applicable laws or regulations enacted or promulgated by any federal or state governmental authority; and
WHEREAS, the Committee, in its settlor capacity, desires to amend the Plan to (i) provide for cessation of active participation for employees of Southern Power Company who are no longer Employees due to the divestiture that has occurred or will occur during 2018; and (ii) provide for full vesting for Southern Power Company Participants and transfer of their benefits to the buyer’s nonqualified plan.
NOW, THEREFORE, pursuant to resolutions adopted on October 22, 2018, the Committee herby amends the Plan as follows, effective as specified herein:
1.
Effective December 4, 2018, the Plan is hereby amended by adding a new Section 4.3 to read as follows:
4.3     Provisions Regarding Divestitures .
(a)     Southern Power Company .
(1)
Cessation of Participation . Effective as of December 4, 2018, Participants who cease to be Employees due to the sale of Southern Power Company’s equity interests in Southern Company – Florida LLC (holding the Stanton Facility) and Southern Company – Oleander LLC (holding the Oleander Facility) will cease to be eligible to actively participate in the Plan.
(2)
Vesting Acceleration . Effective as of December 4, 2018, Participants who cease to be Employees due to the sale of Southern Power Company’s equity interests in Southern Company – Florida LLC (holding the Stanton Facility) and Southern Company – Oleander LLC (holding the Oleander Facility) will be deemed to be fully vested for all purposes hereunder.
(3)
Spinoff to Buyer’s Plan . Effective as of December 4, 2018, all liabilities for the payment of benefits accrued under the Plan with respect to Participants who cease to be Employees due to the sale




of Southern Power Company’s equity interests in Southern Company – Florida LLC (holding the Stanton Facility) and Southern Company – Oleander LLC (holding the Oleander Facility) will be transferred to one or more nonqualified deferred compensation plans maintained by NextEra Energy, Inc.
2.
Except as amended herein by this Fourth Amendment, the Plan shall remain in full force and effect.
IN WITNESS WHEREOF, the Committee, through its duly authorized representative, has adopted this Fourth Amendment to The Southern Company Supplemental Executive Retirement Plan, as amended and restated as of June 30, 2016, this 7th day of December, 2018.
 
BENEFITS ADMINISTRATION COMMITTEE



By:
/s/James M. Garvie



Name:
James M. Garvie



Its:
Chairperson


2

Exhibit 10(a)24

FIFTH AMENDMENT TO THE SOUTHERN COMPANY
SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN
WHEREAS, the Board of Directors of Southern Company Services, Inc. heretofore established and adopted The Southern Company Supplemental Executive Retirement Plan, as amended and restated effective June 30, 2016 (the “Plan”);
WHEREAS , under Section 6.2 of the Plan, the Benefits Administration Committee (the “Committee”) may amend the Plan, provided the amendment either (a) does not involve a substantial increase in cost to any Affiliated Employer, or (b) is necessary, proper, or desirable in order to comply with applicable laws or regulations enacted or promulgated by any federal or state governmental authority; and
WHEREAS, the Committee, in its settlor capacity, desires to amend the Plan to clarify certain provisions relating to business divestitures that occurred during 2018 and to provide for cessation of participation for Gulf Power Company Participants due to the divestiture that occurred on January 1, 2019 and to provide for full vesting for such Participants and transfer of their benefits to the buyer’s nonqualified plan.
NOW, THEREFORE, pursuant to resolutions adopted on August 1, 2018 and October 22, 2018, the Committee herby amends the Plan as follows, effective as specified herein:
1.
Effective January 1, 2019, the Plan is hereby amended by deleting Section 4.3 in its entirety and replacing it with the following:
4.3     Provisions Regarding Divestitures .
(a)     Southern Power Company .
(1)
Cessation of Participation . Effective as of December 4, 2018, Participants who cease to be Employees due to the sale of Southern Power Company’s equity interests in Southern Company – Florida LLC (holding the Stanton Facility) and Southern Company – Oleander LLC (holding the Oleander Facility), or who are included on the list of “Pension Participants” under the Equity Interest Purchase Agreement dated as of May 20, 2018, providing for the sale of the sale of such equity interests of Southern Company – Florida LLC (holding the Stanton Facility) and Southern Company – Oleander LLC (holding the Oleander Facility) will cease to be eligible to participate in the Plan.
(2)
Vesting Acceleration . Effective as of December 4, 2018, Participants who cease to be Employees due to the sale of Southern Power Company’s equity interests in Southern Company – Florida LLC (holding the Stanton Facility) and Southern Company –




Oleander LLC (holding the Oleander Facility) will be deemed to be fully vested for all purposes hereunder.
(3)
Spinoff to Buyer’s Plan . Effective as of December 4, 2018, all liabilities for the payment of benefits accrued under the Plan with respect to Participants who cease to be Employees due to the sale of Southern Power Company’s equity interests in Southern Company – Florida LLC (holding the Stanton Facility) and Southern Company – Oleander LLC (holding the Oleander Facility), or who are included on the list of “Pension Participants” under the Equity Interest Purchase Agreement dated as of May 20, 2018, providing for the sale of the sale of such equity interests of Southern Company – Florida LLC (holding the Stanton Facility) and Southern Company – Oleander LLC (holding the Oleander Facility) will be transferred to one or more nonqualified deferred compensation plans maintained by NextEra Energy, Inc.
(b)     Gulf Power Company .
(1)
Cessation of Participation . Effective as of January 1, 2019, (i) Gulf Power Company will cease to be an Affiliated Employer under the Plan; and (ii) Participants who cease to be Employees due to the sale of Gulf Power Company, or who are included on the list of “Pension Participants” under the Stock Purchase Agreement dated as of May 20, 2018, providing for the sale of Gulf Power Company will cease to be eligible to participate in the Plan.
(2)
Vesting Acceleration . Effective as of January 1, 2019, Participants who cease to be Employees due to the sale of Gulf Power Company will be deemed to be fully vested for all purposes hereunder.
(3)
Spinoff to Buyer’s Plan . Effective as of January 1, 2019, all liabilities for the payment of benefits accrued under the Plan with respect to Participants who cease to be Employees due to the sale of Gulf Power Company, or who are included on the list of “Pension Participants” under the Stock Purchase Agreement dated as of May 20, 2018, providing for the sale of Gulf Power Company will be transferred to one or more nonqualified deferred compensation plans maintained by NextEra Energy, Inc.

2


2.
The Plan is hereby amended by deleting Gulf Power Company from the list of Affiliated Employers in Appendix A.
3.
Except as amended herein by this Fifth Amendment, the Plan shall remain in full force and effect.
IN WITNESS WHEREOF, the Committee, through its duly authorized representative, has adopted this Fifth Amendment to The Southern Company Supplemental Executive Retirement Plan, as amended and restated as of June 30, 2016, this 29th day of January, 2019.
 
BENEFITS ADMINISTRATION COMMITTEE



By:
/s/James M. Garvie



Name:
James M. Garvie



Its:
Chairperson


3

Exhibit 10(a)25

FOURTH AMENDMENT TO THE SOUTHERN COMPANY
SUPPLEMENTAL BENEFIT PLAN


WHEREAS, Southern Company Services, Inc. heretofore established and adopted the Southern Company Supplemental Benefit Plan, as amended and restated effective June 30, 2016 (the “Plan”); and
WHEREAS, under Section 6.2 of the Plan, the Benefits Administration Committee (“Administrative Committee”) may amend the Plan, provided the amendment either (a) does not involve a substantial increase in cost to any Employing Company (as defined in the Plan), or (b) is necessary, proper, or desirable in order to comply with applicable laws or regulations enacted or promulgated by any federal or state governmental authority; and
WHEREAS, the Board of Directors of Southern Company Services, Inc. has approved the amendment of the Plan to reflect the new cash-balance design in the Southern Company Pension Plan (“Pension Plan”) and the addition of provisions related to grandfathered provisions from the merger of the AGL Resources Inc. Retirement Plan into the Pension Plan, effective January 1, 2018; and
WHEREAS, the Administrative Committee by Resolution on August 1, 2018, has determined it is appropriate to amend the Plan to provide that certain nonqualified retirement benefits owed to former employees of Nicor Gas and AGL Resources will be transferred to and payable under the Plan; and
WHEREAS, the Administrative Committee by Resolution on August 1, 2018, has determined it is appropriate to amend the Plan to (i) provide for cessation of active participation for employees of Pivotal Home Solutions, Elizabethtown Gas, Elkton Gas and Florida City Gas who are no longer Employees due to the divestitures that have occurred or will occur during 2018; and (ii) provide for full vesting for Florida City Gas Participants and transfer of their benefits to the buyer’s nonqualified plan; and
WHEREAS, the Administrative Committee by Resolution on October 22, 2018, has determined it is appropriate to amend the Plan to (i) provide for cessation of active participation for employees of Southern Power Company who are no longer Employees due to the divestiture that has occurred or will occur during 2018; and (ii) provide for full vesting for Southern Power Company Participants and transfer of their benefits to the buyer’s nonqualified plan.
NOW, THEREFORE, effective as of January 1, 2018, or as otherwise specified herein, the Plan is hereby amended as follows:
1.
Section 2.18 of the Plan is hereby amended by deleting it in its entirety and replacing it with the following:
2.18 “Fresh Start Method” shall have the meaning set forth in section 4.1(b)(2)(B)(i) of the Plan.




2.
Section 2.19 of the Plan is hereby amended by deleting it in its entirety and replacing it with the following:
2.19 “Fresh Start SCPP Offset” shall have the meaning set forth in section 4.1(b)(2)(B)(iii) of the Plan.
3.
Section 2.24 of the Plan is hereby amended by deleting it in its entirety and replacing it with the following:
2.24 “Participant” shall mean an Employee or former Employee of an Employing Company who is eligible and participates in the Plan pursuant to Sections 4.1 and 4.2.
4.
Section 2.25 of the Plan is hereby amended by deleting it in its entirety and replacing it with the following:
2.25 “Pension Benefit” shall mean the benefit described in Section 5.1 for a given Participant.
5.
Section 2.34(a) of the Plan is hereby amended by adding the following sentence to the end thereof:
If a Participant’s Pension Benefit is based on both a Cash Balance Benefit and a benefit accrued under another Pension Plan formula, (i) the calculation in this paragraph will apply only to the portion of the Pension Benefit that is not based on the Cash Balance Benefit, and (ii) the provisions of subsection (c) below will apply to the portion of the Pension Benefit that is based on the Cash Balance Benefit.
6.
Section 2.34(b) of the Plan is hereby amended by adding the following sentence to the end thereof:
If a Participant’s Pension Benefit is based on both a Cash Balance Benefit and a benefit accrued under another Pension Plan formula, (i) the calculation in this paragraph will apply only to the portion of the Pension Benefit that is not based on the Cash Balance Benefit, and (ii) the provisions of subsection (c) below will apply to the portion of the Pension Benefit that is based on the Cash Balance Benefit.

2



7.
The Plan is hereby amended by adding the following new Section 2.34(c):
(c)     For the portion of a Participant’s Pension Benefit that is based on a Cash Balance Benefit .
(1)     Participant retires under the terms of Article XVII of the Pension Plan at Separation from Service . The Cash Balance Account determined effective as of the first installment to be made under Section 5.2 (ignoring for this purpose any Key-Employee Delay).
(2)     Participant is not eligible to retire under the terms of Article XVII of the Pension Plan at Separation from Service . The Cash Balance Account determined effective as of September 1 of the calendar year following the calendar year of Separation from Service.
8.
Section 2.40 of the Plan is hereby amended by deleting it in its entirety and replacing it with the following:
2.40 “Pre-2016 Benefit Formulas” shall have the meaning of “Pre-2016 Benefit Formula” in effect under the Pension Plan.
9.
Section 4.1(b)(1) of the Plan is hereby amended by deleting it in its entirety and replacing it with the following:
4.1(b)(1)    The Pension Benefit payable under this Plan for each Participant will be calculated based solely on the formula(s) applicable to the Participant under the Pension Plan applied to the period(s) to which such formula(s) apply to such Participant under the Pension Plan.
10.
Section 4.1(b)(2)(B) of the Plan is hereby amended by deleting it in its entirety and replacing it with the following:
(B)    Subject to Section 5.2(g), a former Employee who is re-hired and becomes a Participant in the Plan shall be eligible to accrue a new and separate Pension Benefit, whether or not such Employee previously had a vested right to a Pension Benefit, based on the following terms:
(i) compensation and service earned before the Employee is rehired will not be taken into account when calculating the amount of the

3



rehired Employee’s new and separate Pension Benefit (the “Fresh Start Method”);
(ii) The Pension Benefit accrued following re-hire will be payable in the form and per the timing required by the Plan irrespective of how any prior accrued Pension Benefit is being or will be paid to the Participant; and
(iii) With respect to the Retirement Income that is paid or is payable under the terms of the Pension Plan which is taken into account as an offset to the Pension Benefit payable under Article V of this Plan, compensation and service earned before the Employee is rehired will not be taken into account when calculating the amount of the rehired Employee’s Retirement Income offset amount to be factored in when such rehired Employee subsequently Separates from Service with a new and separate Pension Benefit (the “Fresh Start SCPP Offset”).
11.
The Plan is hereby amended by adding a new Section 4.3 to read as follows:
4.3     Provisions Regarding Divestitures .
(a)     Pivotal Home Solutions .
(1)     Cessation of Participation . Effective as of June 4, 2018, (i) Nicor Energy Services Company d/b/a Pivotal Home Solutions will cease to be an affiliated company of Southern Company Gas for purposes of determining Employing Company status under the Plan; and (ii) Participants who cease to be Employees due to the sale of Nicor Energy Services Company d/b/a Pivotal Home Solutions will cease to be eligible to actively participate in the Plan.
(2)     Payment of Existing Benefits . Notwithstanding subsection (1) above, the Plan benefits of Participants who cease to be Employees due to the sale of Nicor Energy Services Company d/b/a Pivotal Home Solutions will remain in the Plan until fully distributed according to the Plan’s terms.
(b)     Elizabethtown Gas and Elkton Gas .
(1)     Cessation of Participation . Effective as of July 1, 2018, Participants who cease to be Employees due to the sale of certain assets of Pivotal Utility Holdings, Inc. ( i.e. , the Elizabethtown Gas and Elkton Gas divisions) will cease to be eligible to actively participate in the Plan.

4



(2)     Payment of Existing Benefits . Notwithstanding subsection (1) above, the Plan benefits of Participants who cease to be Employees due to the sale of certain assets of Pivotal Utility Holdings, Inc. (i.e., the Elizabethtown Gas and Elkton Gas divisions) will remain in the Plan until fully distributed according to the Plan’s terms.
(c)     Florida City Gas .
(1)     Cessation of Participation . Effective as of July 29, 2018, (i) Pivotal Utility Holdings, Inc. will cease to be an affiliated company of Southern Company Gas for purposes of determining Employing Company status under the Plan; and (ii) Participants who cease to be Employees due to the sale of the stock of Pivotal Utility Holdings, Inc. (holding the Florida City Gas division) will cease to be eligible to actively participate in the Plan.
(2)     Vesting Acceleration . Effective as of July 29, 2018, Participants who cease to be Employees due to the sale of the stock of Pivotal Utility Holdings, Inc. ( i.e. , the Florida City Gas division), or who are included on the list of “Pension Participants” under the Stock Purchase Agreement dated as of May 20, 2018, providing for the sale of the stock of Pivotal Utility Holdings, Inc., will be deemed to be fully vested in their benefits and Accounts for all purposes hereunder.
(3)     Spinoff to Buyer’s Plan . Effective as of July 29, 2018, all liabilities for the payment of benefits accrued under the Plan with respect to Participants who cease to be Employees due to the sale of the stock of Pivotal Utility Holdings, Inc. ( i.e. , the Florida City Gas division), or who are included on the list of “Pension Participants” under the Stock Purchase Agreement dated as of May 20, 2018, providing for the sale of the stock of Pivotal Utility Holdings, Inc., will be transferred to one or more nonqualified deferred compensation plans maintained by NextEra Energy, Inc.
(d)     Southern Power Company .
(1)     Cessation of Participation . Effective as of December 4, 2018, Participants who cease to be Employees due to the sale of Southern Power Company’s equity interests in Southern Company – Florida LLC (holding the Stanton Facility) and Southern Company – Oleander LLC (holding the Oleander Facility) will cease to be eligible to actively participate in the Plan.
(2)     Vesting Acceleration . Effective as of December 4, 2018, Participants who cease to be Employees due to the sale of Southern

5



Power Company’s equity interests in Southern Company – Florida LLC (holding the Stanton Facility) and Southern Company – Oleander LLC (holding the Oleander Facility) will be deemed to be fully vested in their benefits and Accounts for all purposes hereunder.
(3)     Spinoff to Buyer’s Plan . Effective as of December 4, 2018, all liabilities for the payment of benefits accrued under the Plan with respect to Participants who cease to be Employees due to the sale of Southern Power Company’s equity interests in Southern Company – Florida LLC (holding the Stanton Facility) and Southern Company – Oleander LLC (holding the Oleander Facility) will be transferred to one or more nonqualified deferred compensation plans maintained by NextEra Energy, Inc.
12.
Section 5.1(a) of the Plan is hereby amended by deleting the first sentence in its entirety and replacing it with the following:
(a)    Each Participant shall be entitled to a Pension Benefit equal to that portion of the Retirement Income under the Pension Plan which is not payable under the Pension Plan to such Participant as a result of the limitations imposed by Code Sections 401(a)(17) and 415(b), subject to the modifications provided in subsection (b) below.
13.
Section 5.1(b) of the Plan is hereby amended by deleting it in its entirety and replacing it with the following:
(b)    For purposes of this Section 5.1, the “earnings” used to calculate the Pension Benefit of a Participant (other than under the Gas Provisions) shall be modified as follows: all incentive pay earned while he is an Employee under any annual group incentive plans, as defined in Section 4.2 of the Pension Plan, shall be considered, provided such incentive award was earned on or after January 1, 1994; however, incentive pay shall only be included in a Pre-2016 Participant’s “earnings” for purposes of calculating such Pre-2016 Participant’s Pension Benefit using the 1.25% formula described in Section 4.2 of the Pension Plan. Effective beginning January 1, 2018, a Participant’s “earnings” or, in the case of Participants accruing benefits under the Gas Provisions, “Compensation”, shall not include commissions earned by any commissioned Employee for purposes of determining the Pension Benefit calculated under the Plan.

6



14.
Section 5.2(a) of the Plan is hereby amended by adding the following sentence to the end thereof:
The provisions of this Section 5.2 will not apply to benefits that were accrued under the AGL Resources Inc. Excess Plan and which transferred to the Plan.
15.
Section 5.2(e) of the Plan is hereby amended by deleting it in its entirety and replacing it with the following:
(e)     Participants Who Terminate with Vested Benefits .
(1)     General Rule . With respect to a Participant who Separates from Service on or after March 1, 2007, to the extent the Participant is not eligible to retire under Sections 4.1(a), 4.1(b) or 4.1(c), Article XVII or Schedule III of the Pension Plan, but is vested in his Retirement Income under the Pension Plan, notwithstanding anything to the contrary, such Participant shall receive a Pension Benefit in the form of a single payment made as of September 1 of the calendar year following the calendar year of termination from employment.
(2)     For a Participant who first participates in the Plan before January 1, 2018 and is not rehired on or after January 1, 2018 . The single payment of the portion of the Pension Benefit that is not based on a Cash Balance Benefit is equal to (A) divided by (B) below:
(A)    The Single-Sum Amount determined as if the Participant’s first installment date was to be coincident with his Normal Retirement Date.
(B)    The sum of one (1) plus the Discount Rate raised to a power equal to the number of years and months between the Participant’s Normal Retirement Date and the September 1 of the calendar year following the calendar year of termination from employment.
(3)     For a Participant who first participates in the Plan on or after January 1, 2018 or is rehired on or after January 1, 2018 . The single payment of the portion of the Pension Benefit that is not based on a Cash Balance Benefit is equal to the Single-Sum Amount described in Section 2.34(b)(2).
For the avoidance of doubt, the Discount Rate used for the calculations in Section 5.2(e)(2) and 5.2(e)(3) above is to be the Discount Rate applicable for the calendar year the Participant Separates from Service.

7



(4)     For the portion of a Participant’s Pension Benefit that is based on a Cash Balance Benefit. The single payment is equal to the Cash Balance Account.
(5)     Death Benefits . With respect to a Participant who first participates in the Plan before January 1, 2018 and is not rehired on or after January 1, 2018, to which this Section 5.2(e) applies, if such a Participant dies after Separation from Service but prior to payment in accordance with Section 5.2(e)(1) above and prior to July 1, 2017, the Provisional Payee, if any, shall receive the single payment provided in Section 5.2(e)(2) above at the same time the Participant would have received such payment if he had not died.
If a Participant dies on or after July 1, 2017, refer to Section 5.2(f).
(6)     Total Disability . The determination of whether a Participant who is not eligible to retire has a Separation from Service by reason of a Total Disability will be made in accordance with Code Section 409A, and such Participant shall receive a Pension Benefit in the form of a single payment made as of September 1 of the calendar year following the calendar year in which the Separation from Service occurs.
16.
Section 5.2(f) of the Plan is hereby amended by deleting it in its entirety and replacing it with the following:
(f)     Designated Beneficiary Death Benefit on and after July 1, 2017 .
(1)    If a Participant dies on or after July 1, 2017, while in active service or after Separation from Service with a vested Pension Benefit in this Plan, death benefits will be determined pursuant to this subsection.
(A)     For the portion of a Participant’s Pension Benefit that is not based on a Cash Balance Benefit :
(I)    If such Participant is a Pre-2016 Participant, and (i) he has elected his Spouse as his sole Designated Beneficiary, such Spouse shall receive 100% of the Single-Sum Amount, or (ii) he has elected a Designated Beneficiary(ies) which is not his Spouse, such Designated Beneficiary(ies) shall receive 50% of the Single-Sum Amount with an equal portion of such Single-Sum Amount payable to each such living Designated Beneficiary, or
(II)    If the Participant is not a Pre-2016 Participant, the Designated Beneficiary(ies) (whether or not the Spouse) shall receive 50% of the Single-Sum Amount with an

8



equal portion of such Single-Sum Amount payable to each such living Designated Beneficiary.
(B)     For the portion of a Participant’s Pension Benefit that is based on a Cash Balance Benefit : The Designated Beneficiary(ies) (whether or not the Spouse) shall receive 100% of the Single-Sum Amount, with an equal portion of such Single-Sum Amount payable to each such living Designated Beneficiary.
(2)    The form of payment of the Single-Sum Amount described in Section 5.2(f)(1) above is as follows:
(A)     For deaths prior to April 1, 2019. A single lump sum equal to the Single-Sum Amount is payable to the Designated Beneficiary(ies) on the first of the month following the date of the Participant’s death. The single lump sum benefit will be payable as soon as administratively feasible after the Designated Beneficiary(ies) have been confirmed and located.
(B)     For deaths on or after April 1, 2019. Ten (10) annual installments are payable to the Designated Beneficiary(ies), commencing on the first of the month following the date of the Participant’s death. The first installment shall be derived from the Single-Sum Amount(s) plus Earnings, if any, divided by ten (10). Subsequent annual installments shall be amounts equal to the Participant’s unpaid Single-Sum Amount(s) plus Earnings divided by the number of remaining annual payments. The first annual installment will be payable as soon as administratively feasible after the Designated Beneficiary(ies) have been confirmed and located. This payment is subject to the cash out rules described in Section 5.11 of the Plan.
(3)    If a Participant who first participates in the Plan before January 1, 2018 and is not rehired on or after January 1, 2018, dies while in active service and prior to age 50, the Single-Sum Amount described in Section 5.2(f)(1)(A) above (with respect to the portion of the Pension Benefit that is not based on a Cash Balance Benefit) is calculated as (A) divided by (B) below:
(A) The Single-Sum Amount determined as if the Participant survived to his fiftieth (50 th ) birthday and Separated from Service.
(B) The sum of one (1) plus the Discount Rate raised to a power equal to the number of years and months between the first of the second month following the Participant’s 50 th birthday and the first of the month following the Participant’s date of death.

9



(4)    If a Participant who first participates in the Plan on or after January 1, 2018 or is rehired on or after January l, 2018, dies while in active service and prior to age 50, the Single-Sum Amount described in Section 5.2(f)(1)(A) above (with respect to the portion of the Pension Benefit that is not based on a Cash Balance Benefit) is calculated as the actuarial present value of the Pension Benefit payable as a single life annuity calculated using the Discount Rate and the “Applicable Mortality Table” within the meaning of Code Section 417(e)(3) described by the Secretary of the Treasury for the calendar year in which the Participant Separates from Service. This Single-Sum Amount calculation shall be determined as of the first of the month following the Participant’s date of death taking into account the following: (a) no reductions are applied for the Death Benefit Charge-Basic or the Death Benefit Charge-Enhanced for preretirement death benefit coverage under the Pension Plan; and (b) the actuarial present value calculation reflects a deferred factor to the first of the month coincident with or following the Participant’s age 50; and (c) the Pension Benefit is payable at the first of the month coincident with or following the Participant’s age 50.
(5)    If a Participant who first participates in the Plan on or after January 1, 2018 or is rehired on or after January 1, 2018, dies while in active service at age 50 or later, the Single-Sum Amount described in Section 5.2(f)(1)(A) above (with respect to the portion of the Pension Benefit that is not based on a Cash Balance Benefit) is calculated as the Single-Sum Amount described in Section 2.34(b)(1).
(6)    If a Participant who first participates in the Plan before January 1, 2018 and is not rehired on or after January 1, 2018, dies after Separation from Service but prior to payment in accordance with Section 5.2(e)(1) above, the Single-Sum Amount described in Section 5.2(f)(1)(A) above (with respect to the portion of the Pension Benefit that is not based on a Cash Balance Benefit) is calculated as (A) divided by (B) below:
(A) The Single-Sum Amount determined as if the Participant’s first installment date was to be coincident with his Normal Retirement Date.
(B) The sum of one (1) plus the Discount Rate raised to a power equal to the number of years and months between the Participant’s Normal Retirement Date and the first of the month following the Participant’s date of death.
(7)    If a Participant who first participates in the Plan after January 1, 2018 or is rehired on or after January 1, 2018, dies after Separation from Service but prior to payment in accordance with Section 5.2(e)(1) above, the Single-Sum Amount described in Section 5.2(f)(1)(A) above (with respect to the portion of the Pension Benefit that is not based on a Cash

10



Balance Benefit) is calculated as the actuarial present value of the Pension Benefit payable as a single life annuity calculated using the Discount Rate and the “Applicable Mortality Table” within the meaning of Code Section 417(e)(3) described by the Secretary of the Treasury for the calendar year in which the Participant Separates from Service. This Single-Sum Amount calculation shall be determined as of the first of the month following the Participant’s date of death taking into account the following: (a) no reductions are applied for the Death Benefit Charge-Basic or the Death Benefit Charge-Enhanced for preretirement death benefit coverage under the Pension Plan; and (b) the actuarial present value calculation reflects a deferred to Normal Retirement Date factor; and (c) the Pension Benefit is payable at the Participant’s Normal Retirement Date.
With respect to Section 5.2(f)(1)(A) above, for the avoidance of doubt, the Participant may either elect his Spouse as his sole Designated Beneficiary or may elect Designated Beneficiary(ies) none of which is the Spouse.
(8)    If a Participant dies while in active service, the Single-Sum Amount described in Section 5.2(f)(1)(B) above (with respect to the portion of the Pension Benefit that is based on a Cash Balance Benefit) is equal to the Cash Balance Account.
(9)    If a Participant dies after Separation from Service but prior to payment in accordance with Section 5.2(e)(1) above, the Single-Sum Amount described in Section 5.2(f)(1)(B) above (with respect to the portion of the Pension Benefit that is based on a Cash Balance Benefit) is equal to the Cash Balance Account.
17.
Section 5.2(g) of the Plan is hereby amended by deleting it in its entirety and replacing it with the following:
(g)     Treatment of Re-hired Employees on and after January 2, 2017 .
(1)    A Participant that is rehired and whose benefit is either suspended under the Pension Plan or has not commenced being paid his Retirement Income under the Pension Plan will have his Pension Benefit calculated (A) using the “Fresh Start Method” with “Fresh Start SCPP Offset” and (B) in accordance with the formula(s) applicable to the Participant under the Pension Plan following rehire.
(2)    A Participant that is rehired by an Employing Company and previously received his entire Retirement Income in the Pension Plan in the form of a lump sum distribution shall have his Pension Benefit calculated (A) using the “Fresh Start Method” and (B) in accordance with the formula(s) applicable to the Participant under the Pension Plan following rehire.

11



18.
The Plan is hereby amended by adding the following new Section 5.13, effective as of August 1, 2018:
5.13     Nicor Grandfathered Benefits .
Notwithstanding the provisions of Article IV, the individuals listed on the attached Appendix C, who are former employees of Nicor Gas or AGL Resources and their affiliates and their beneficiaries, will be entitled to receive the periodic benefit payments described in Appendix C (the “Gas Grandfathered Benefits”). Gas Grandfathered Benefits will not be considered Pension Benefits or Non-Pension Benefits hereunder, but will be payable under the Plan according to the terms described in Appendix C. The individuals listed on Appendix C will be considered Participants in the Plan solely with respect to the Gas Grandfathered Benefits, and will not be entitled to a Pension Benefit or Non-Pension Benefit unless they otherwise meet the requirements set forth in Articles IV and V for eligibility for such benefits. Sections 5.9 and 5.10 of the Plan will not apply to Gas Grandfathered Benefits.
19.
The Plan is hereby amended by adding the following new Appendix C, effective as of August 1, 2018:
APPENDIX C

GAS GRANDFATHERED BENEFITS TO BE PAID UNDER THE PLAN

I.     Benefits from the Nicor Gas Supplementary Retirement Plan . The following periodic benefit payments previously provided under the Nicor Gas Supplementary Retirement Plan will be transferred to and payable under the Plan:
Name
Description of Payments
Annual Amount
Type
[              ]
Payments for life, no survivor benefit
$43,164.00
Retiree benefits
[              ]
Payments for life, no survivor benefit
$3,216.00
Retiree benefits
[              ]
Payments for life
$726.00
Survivor benefits
[              ]
Payments for life, no survivor benefit
$1,405.92
Retiree benefits

12




Name
Description of Payments
Annual Amount
Type
[              ]
Payments for life, no survivor benefit
$14,534.04
Alternate payee benefits under qualified domestic relations order
[              ]
Payments for life, no survivor benefit
$22,476.00
Retiree benefits

II.     Benefits from the Nicor Gas Supplementary Savings Plan . The following benefits previously provided under the Nicor Gas Supplementary Savings Plan will be transferred to and payable under the Plan:
(A)     Accounts . As of December 31, 2017, each of the following individuals will be credited with a bookkeeping account balance as follows, payable in the indicated form of payment:
Name
Account Balance
Method of Distribution of Account
Type
[              ]
$12,885.06
Annual installments ending with the installment payment made in 2020
Survivor benefits
[              ]
$350,634.27
Annual installments ending with the installment payment made in 2031
Retiree benefits
[              ]
$29,849.57
Annual installments ending with the installment payment made in 2021
Retiree benefits

(B)     Adjustment for Earnings . As of the last day of each calendar year (beginning with 2018) until the full amount owed to the payee is distributed, each such individual’s account balance will be adjusted (i) first, by charging to the account the amount of any distributions that have been paid during such calendar year, and (ii) second, by crediting to the account interest calculated based on the first segment interest rate under Code Section 417(e) for August preceding such calendar year, based on the balance of the account as of the end of such calendar year.
(C)     Death before Distribution . In the event that an individual entitled to a benefit under this Section II dies before the full amount of the account has been

13



distributed, the remaining installment payments will be paid to that individual’s Designated Beneficiary as defined in Section VI below.
III.     Benefits from the Nicor Capital Accumulation Plan . The following periodic benefit payments previously provided under the Nicor Capital Accumulation Plan will be transferred to and payable under the Plan:
Name
Description of Payments
Annual Amount
Type
[              ]
Annual payments each January, ending with the payment made in 2022
$84,096.00
Survivor benefits
[              ]
Annual payments each January, ending with the payment made in 2022
$41,772.00
Retiree benefits
[              ]
Annual payments each January, ending with the payment made in 2023
$185,037.00
Retiree benefits
[              ]
Annual payments each January, ending with the payment made in 2029
$173,044.00
Retiree benefits
[              ]
Annual payments each January, ending with the payment made in 2029
$116,060.00
Retiree benefits
[              ]
Annual payments each January, ending with the payment made in 2025
$140,162.00
Retiree benefits
[              ]
Annual payments each January, ending with the payment made in 2022
$31,329.00
Retiree benefits

In the event that an individual entitled to a benefit under this Section III dies before all of the applicable payments have been made, the remaining payments will be paid to that individual’s Designated Beneficiary as defined in Section VI below.
IV.     Benefits from Individual Agreements Attributable to Discontinued Nicor Gas Operations . The following periodic retiree benefit payments previously provided under individual agreements entered into with the indicated former Nicor Gas employees will be transferred to and payable under the Plan:

14



Name
Description of Payments
Annual Amount
Type
[              ]
Monthly payments for life, no survivor benefit
$9,642.48
Retiree benefits
[              ]
Monthly payments until the earlier of October 2022 or the death of the participant
$7,950.00
Retiree benefits
[              ]
Monthly payments for life
$44,196.00
Retiree benefits
[              ]
Monthly payments for life, beginning the month after [              ] death
$13,140.00
Survivor benefits (with respect to participant [              ])
[              ]
Monthly payments until the earlier of October 2027 or the death of the participant
$3,800.04
Retiree benefits
[              ]
Monthly payments until the earlier of January 2021 or the death of the participant
$5,049.96
Retiree benefits
[              ]
Monthly payments until the earlier of February 2023 or the death of the participant
$3,950.04
Retiree benefits
[              ]
Monthly payments for life, no survivor benefit
$2,299.08
Retiree benefits
[              ]
Monthly payments for life, no survivor benefit
$3,232.20
Retiree benefits

V.     Benefits from Individual Agreements Attributable to Former AGL Resources Employees . The following periodic retiree benefit payments previously provided under individual agreements entered into with the indicated former AGL Resources employees will be transferred to and payable under the Plan:

15



Name
Description of Payments
Annual Amount
Type
[              ]
Monthly payments for life
$48,605.16
Retiree benefits
[              ]
Monthly payments for life, beginning the month after [              ] death
$24,302.58
Survivor benefits (with respect to participant [              ])
[              ]
Monthly payments for life
$213.72
Retiree benefits

VI.     Designated Beneficiaries . For purposes of this Appendix C, the term “Designated Beneficiary” will mean the person(s) or entity(ies) identified by a payee in a manner prescribed by the Administrative Committee as eligible to receive any survivor benefit payable with respect to the benefits described in Section II or Section III of this Appendix C, as applicable. In the event no such designation is made by a payee, or if such beneficiary is not living or in existence at the time for commencement or continuance of such payment under the Plan following the payee’s death, such payment will be made to the person or persons in the first of the following classes of successive preference, if then living:
(a) the payee’s spouse on the date of his death;
(b) the payee’s legally recognized children, equally;
(c) the payee’s parents, equally;
(d) the payee’s brothers and sisters, equally; or
(e) the payee’s executors or administrators.
Payment to such one or more persons will completely discharge the Plan with respect to the amount so paid.
VII.     Administration of Payments . Payments under this Appendix are intended to be administered according to the payment administration of the Plan, beginning as soon as reasonably practicable following adoption of this Appendix.
20.
Except as amended herein by this Fourth Amendment, the Plan shall remain in full force and effect.

16




IN WITNESS WHEREOF , the Administrative Committee, through its authorized representative, has adopted this Fourth Amendment to the Southern Company Supplemental Benefit Plan, as amended and restated as of June 30, 2016, this 14th day of December, 2018.

 
BENEFITS ADMINISTRATION COMMITTEE



By:
/s/James M. Garvie



Name:
James M. Garvie



Its:
Chairperson


17


Exhibit 10(a)26

FIFTH AMENDMENT TO THE SOUTHERN COMPANY
SUPPLEMENTAL BENEFIT PLAN


WHEREAS, Southern Company Services, Inc. heretofore established and adopted the Southern Company Supplemental Benefit Plan, as amended and restated effective June 30, 2016 (the “Plan”);
WHEREAS, under Section 6.2 of the Plan, the Benefits Administration Committee (“Administrative Committee”) may amend the Plan, provided the amendment either (a) does not involve a substantial increase in cost to any Employing Company (as defined in the Plan), or (b) is necessary, proper, or desirable in order to comply with applicable laws or regulations enacted or promulgated by any federal or state governmental authority; and
WHEREAS , the Administrative Committee by Resolutions on August 1, 2018 and October 22, 2018, has determined it is appropriate to amend the Plan to clarify certain provisions relating to business divestitures that occurred during 2018 and to provide for cessation of participation for Gulf Power Company Participants due to the divestiture that occurred on January 1, 2019, and to provide for full vesting for such Participants and transfer of their benefits to the buyer’s nonqualified plan.
NOW, THEREFORE, effective as of January 1, 2019, the Plan is hereby amended as follows:
1.
The Plan is hereby amended by deleting paragraphs (c) and (d) of Section 4.3 and replacing them with the following:
(c)     Florida City Gas .
(1)     Cessation of Participation . Effective as of July 29, 2018, (i) Pivotal Utility Holdings, Inc. will cease to be an affiliated company of Southern Company Gas for purposes of determining Employing Company status under the Plan; and (ii) Participants who cease to be Employees due to the sale of the stock of Pivotal Utility Holdings, Inc. (holding the Florida City Gas division) or who are included on the list of “Pension Participants” under the Stock Purchase Agreement dated as of May 20, 2018, providing for the sale of the stock of Pivotal Utility Holdings, Inc. will cease to be eligible to participate in the Plan.
(2)     Vesting Acceleration . Effective as of July 29, 2018, Participants who cease to be Employees due to the sale of the stock of Pivotal Utility Holdings, Inc. (holding the Florida City Gas division) will be deemed to be fully vested in their benefits and Accounts for all purposes hereunder.




(3)     Spinoff to Buyer’s Plan . Effective as of July 29, 2018, all liabilities for the payment of benefits accrued under the Plan with respect to Participants who cease to be Employees due to the sale of the stock of Pivotal Utility Holdings, Inc. (holding the Florida City Gas division), or who are included on the list of “Pension Participants” under the Stock Purchase Agreement dated as of May 20, 2018, providing for the sale of the stock of Pivotal Utility Holdings, Inc., will be transferred to one or more nonqualified deferred compensation plans maintained by NextEra Energy, Inc.
(d)     Southern Power Company .
(1)     Cessation of Participation . Effective as of December 4, 2018, Participants who cease to be Employees due to the sale of Southern Power Company’s equity interests in Southern Company – Florida LLC (holding the Stanton Facility) and Southern Company – Oleander LLC (holding the Oleander Facility), or who are included on the list of “Pension Participants” under the Equity Interest Purchase Agreement dated as of May 20, 2018, providing for the sale of the sale of such equity interests of Southern Company – Florida LLC (holding the Stanton Facility) and Southern Company – Oleander LLC (holding the Oleander Facility) will cease to be eligible to participate in the Plan.
(2)     Vesting Acceleration . Effective as of December 4, 2018, Participants who cease to be Employees due to the sale of Southern Power Company’s equity interests in Southern Company – Florida LLC (holding the Stanton Facility) and Southern Company – Oleander LLC (holding the Oleander Facility) will be deemed to be fully vested in their benefits and Accounts for all purposes hereunder.
(3)     Spinoff to Buyer’s Plan . Effective as of December 4, 2018, all liabilities for the payment of benefits accrued under the Plan with respect to Participants who cease to be Employees due to the sale of Southern Power Company’s equity interests in Southern Company – Florida LLC (holding the Stanton Facility) and Southern Company – Oleander LLC (holding the Oleander Facility), or who are included on the list of “Pension Participants” under the Equity Interest Purchase Agreement dated as of May 20, 2018, providing for the sale of the sale of such equity interests of Southern Company – Florida LLC (holding the Stanton Facility) and Southern Company – Oleander LLC (holding the Oleander Facility) will be transferred to one or more nonqualified deferred compensation plans maintained by NextEra Energy, Inc.

2



(e)     Gulf Power Company .
(1)     Cessation of Participation . Effective as of January 1, 2019, (i) Gulf Power Company will cease to be an Employing Company under the Plan; and (ii) Participants who cease to be Employees due to the sale of Gulf Power Company, or who are included on the list of “Pension Participants” under the Stock Purchase Agreement dated as of May 20, 2018, providing for the sale of Gulf Power Company will cease to be eligible to participate in the Plan.
(2)     Vesting Acceleration . Effective as of January 1, 2019, Participants who cease to be Employees due to the sale of Gulf Power Company will be deemed to be fully vested in their benefits and Accounts for all purposes hereunder.
(3)     Spinoff to Buyer’s Plan . Effective as of January 1, 2019, all liabilities for the payment of benefits accrued under the Plan with respect to Participants who cease to be Employees due to the sale of Gulf Power Company, or who are included on the list of “Pension Participants” under the Stock Purchase Agreement dated as of May 20, 2018, providing for the sale of Gulf Power Company will be transferred to one or more nonqualified deferred compensation plans maintained by NextEra Energy, Inc.
2.
The Plan is hereby amended by deleting Gulf Power Company from the list of Employing Companies in Appendix A.
3.
Except as amended herein by this Fifth Amendment, the Plan shall remain in full force and effect.
IN WITNESS WHEREOF , the Administrative Committee, through its authorized representative, has adopted this Fifth Amendment to the Southern Company Supplemental Benefit Plan, as amended and restated as of June 30, 2016, this 29th day of January, 2019.

 
BENEFITS ADMINISTRATION COMMITTEE



By:
/s/James M. Garvie



Name:
James M. Garvie



Its:
Chairperson


3

Exhibit 10(a)27

SECOND AMENDMENT TO THE
DEFERRED STOCK TRUST AGREEMENT
FOR DIRECTORS OF SOUTHERN COMPANY AND ITS SUBSIDIARIES
WHEREAS, the Grantors entered into the Deferred Stock Trust Agreement for Directors of Southern Company and its Subsidiaries (the “Trust”) as amended and restated effective January 1, 2000, and subsequently further amended effective January 1, 2009; and
WHEREAS , the Grantors desire to amend the Trust in order to reflect Southern Company’s divestiture of one of the Grantors, Gulf Power Company, the removal of Gulf Power Company as a Grantor under the Trust, the addition of Southern Company Gas as a Grantor under the Trust, the transfer of sponsorship of the Deferred Compensation Plan from Gulf Power Company to Southern Company, and the addition of the Deferred Compensation Plan sponsored by Southern Company Gas as a plan subject to the Trust; and
WHEREAS, pursuant to Section 4 of the Trust, the Grantors have the authority to amend the Trust at any time prior to a Preliminary CIC, and in the event of a Preliminary CIC may amend the Trust with the agreement of a majority of the Beneficiaries of the Trust, provided in either case the amendment does not increase the duties of the Trustee; and
WHEREAS, this Second Amendment to the Trust will not result in an increase to the duties of the Trustee; and
WHEREAS, Sections 1 and 17(k) of the Trust provide that Beneficiaries for these purposes are Directors of the applicable Grantor who are eligible for a benefit under the applicable Plan, and for whom all amounts due under such Plan have not been satisfied; and
WHEREAS, only Gulf Power Company has experienced a Preliminary CIC.
NOW, THEREFORE, the Grantors hereby amend the Trust as follows:
1.
Effective as of the date Gulf Power Company ceases to be a subsidiary of Southern Company, Gulf Power Company shall cease to be a Grantor of the Trust and all references to Grantor thereunder shall no longer include Gulf Power Company.
2.
Effective as of the date of execution of this Amendment by all Grantors, Southern Company Gas shall be a Grantor of the Trust and all references to Grantor thereunder shall include Southern Company Gas.




3.
Effective as of the date of execution of this Amendment by all Grantors, the last sentence of Section 5 of the Trust is amended by removing the word “or” prior to subsection (d) and adding the following at the end of such sentence:
“or (e) upon written representation to the Trustee that all benefits have been paid to Beneficiaries by a Grantor such that the Grantor has no remaining obligations to any Beneficiary covered by the Trust, assets allocated to the Grantor’s separate Trust account shall be returned to the Grantor regardless of any targeted funding level.”
4.
Effective as of the date Gulf Power Company ceases to be a subsidiary of Southern Company, Exhibit A is deleted in its entirety and replaced with the following:
EXHIBIT A
Plans and Arrangements Subject to the Trust

Deferred Compensation Plan for Directors of Alabama Power Company
Deferred Compensation Plan for Directors of Georgia Power Company
Deferred Compensation Plan for Directors of Mississippi Power Company
Deferred Compensation Plan for Directors of Savannah Electric and Power Company
Deferred Compensation Plan for Directors of Southern Company Gas
Deferred Compensation Plan for Directors of The Southern Company
Deferred Compensation Plan for Directors of Gulf Power Company
(sponsored by Southern Company)

2



5.
Effective as of the date of execution of this Amendment, Section 16(i) of the Trust is deleted in its entirety and replaced with the following:
“(i)    The Grantors:
Southern Company
Myra C. Bierria
Corporate Secretary
30 Ivan Allen Jr. Boulevard NW
Atlanta, GA 30308”
6.
Effective as of the date of execution of this Amendment, all amounts held by the Trustee under the Trust for the account of Gulf Power Company shall be held by the Trustee under the Trust for the account of Southern Company as plan sponsor of the Deferred Compensation Plan for Directors of Gulf Power Company.
7.
Except as amended herein by this Second Amendment, the Trust shall remain in full force and effect as adopted by the Grantors prior to the adoption of this Second Amendment.

[SIGNATURES ON FOLLOWING PAGE]


3


IN WITNESS WHEREOF , the undersigned have executed this Second Amendment to the Trust Agreement as of the 29 th day of December, 2018.


ALABAMA POWER COMPANY
 
MISSISSIPPI POWER COMPANY
By:
/s/Ceila H. Shorts
 
By:
/s/Jeffrey A. Stone
Name:
Ceila H. Shorts
 
Name:
Jeffrey A. Stone
Title:
Corporate Secretary
 
Title:
Vice President & Corporate Secretary
 
 
 
 
 
GEORGIA POWER COMPANY
 
SOUTHERN COMPANY GAS
By:
/s/Kristi L. Dow
 
By:
/s/Myra C. Bierria
Name:
Kristi L. Dow
 
Name:
Myra C. Bierria
Title:
Assistant Secretary
 
Title:
Assistant Secretary
 
 
 
 
 
GULF POWER COMPANY
 
SOUTHERN COMPANY
By:
/s/Jeffrey A. Stone
 
By:
/s/Myra C. Bierria
Name:
Jeffrey A. Stone
 
Name:
Myra C. Bierria
Title:
Vice President & Corporate Secretary
 
Title:
Secretary
 
 
 
 
 



4



ACKNOWLEDGMENT AND AGREEMENT
The undersigned, constituting all of the potential Beneficiaries related to Gulf Power Company, hereby acknowledge and agree to this Second Amendment as of the 29 th day of December, 2018.
 
/s/Allan G. Bense
 
Allan G. Bense
 
 
 
/s/Deborah H. Calder
 
Deborah H. Calder
 
 
 
/s/Julian B. MacQueen
 
Julian B. MacQueen
 
 
 
/s/J. Mort O’Sullivan
 
J. Mort O’Sullivan
 
 
 
/s/Michael T. Rehwinkel
 
Michael T. Rehwinkel
 
 
 
 
 
William A. Pullum
 
 
 
 
 
William C. Cramer, Jr.

Signature Page to Second Amendment to
Director Deferred Stock Trust Agreement
NAI-1505932775v1
Exhibit 10(a)28

SECOND AMENDMENT TO THE
DEFERRED CASH COMPENSATION TRUST AGREEMENT
FOR DIRECTORS OF SOUTHERN COMPANY AND ITS SUBSIDIARIES
WHEREAS, the Grantors entered into the Deferred Cash Compensation Trust Agreement for Directors of Southern Company and its Subsidiaries (the “Trust”) as amended and restated effective September 1, 2001, and subsequently further amended effective January 1, 2009; and
WHEREAS , the Grantors desire to amend the Trust in order to reflect Southern Company’s divestiture of one of the Grantors, Gulf Power Company, including the removal of Gulf Power Company as a Grantor under the Trust, the addition of Southern Company Gas as a Grantor under the Trust, and the removal and addition of the applicable Deferred Compensation Plans sponsored by those Grantors as plans subject to the Trust; and
WHEREAS, pursuant to Section 4 of the Trust, the Grantors have the authority to amend the Trust at any time prior to a Preliminary CIC, and in the event of a Preliminary CIC may amend the Trust with the agreement of a majority of the Beneficiaries of the Trust, provided in either case the amendment does not increase the duties of the Trustee; and
WHEREAS, this Second Amendment to the Trust will not result in an increase to the duties of the Trustee; and
WHEREAS, Sections 1 and 17(k) of the Trust provide that Beneficiaries for these purposes are Directors of the applicable Grantor who are eligible for a benefit under the applicable Plan, and for whom all amounts due under such Plan have not been satisfied; and
WHEREAS, only Gulf Power Company has experienced a Preliminary CIC and all Directors owed a benefit under the Deferred Compensation Plan for Directors of Gulf Power Company have been fully paid.
NOW, THEREFORE, the Grantors hereby amend the Trust as follows:
1.
Effective as of the date Gulf Power Company ceases to be a subsidiary of Southern Company, Gulf Power Company shall cease to be a Grantor of the Trust and all references to Grantor thereunder shall no longer include Gulf Power Company.
2.
Effective as of the date of execution of this Amendment by all Grantors, Southern Company Gas shall be a Grantor of the Trust and all references to Grantor thereunder shall include Southern Company Gas.

1


3.
Effective as of the date of execution of this Amendment by all Grantors, the last sentence of Section 5 of the Trust is amended by removing the word “or” prior to subsection (d) and adding the following at the end of such sentence:
“or (e) upon written representation to the Trustee that all benefits have been paid to Beneficiaries by a Grantor such that the Grantor has no remaining obligations to any Beneficiary covered by the Trust, assets allocated to the Grantor’s separate Trust account shall be returned to the Grant regardless of any targeted funding level.”
4.
Effective as of the date Gulf Power Company ceases to be a subsidiary of Southern Company, Exhibit A is deleted in its entirety and replaced with the following:
EXHIBIT A
Plans and Arrangements Subject to the Trust

Deferred Compensation Plan for Directors of Alabama Power Company
Deferred Compensation Plan for Directors of Georgia Power Company
Deferred Compensation Plan for Directors of Mississippi Power Company
Deferred Compensation Plan for Directors of Savannah Electric and Power Company
Deferred Compensation Plan for Directors of Southern Company Gas
Deferred Compensation Plan for Directors of The Southern Company
5.
Effective as of the date Gulf Power Company ceases to be a subsidiary of Southern Company, Exhibit B is deleted in its entirety and replaced with the following:
EXHIBIT B
Contacts and Addresses of Grantors
Alabama Power Company
Ceila H. Shorts
Corporate Secretary
600 North 18th Street
Birmingham, AL 35291

2



Georgia Power Company
Meredith M. Lackey
Corporate Secretary
241 Ralph McGill Boulevard
Atlanta, GA 30308

Mississippi Power Company
Jeffrey A. Stone
Corporate Secretary
2992 West Beach Boulevard
Gulfport, MS 39501

Savannah Electric and Power Company
c/o Georgia Power Company
Meredith M. Lackey
Corporate Secretary
241 Ralph McGill Boulevard
Atlanta, GA 30308

Southern Company Gas
Barbara P. Christopher
Corporate Secretary
10 Peachtree Place NE
BIN 119
Atlanta, GA 30309

Southern Company
Myra C. Bierria
Corporate Secretary
30 Ivan Allen Jr. Boulevard NW
Atlanta, GA 30308
6.
In connection with this Second Amendment, all amounts held by the Trustee under the Trust for the account of Gulf Power Company shall be distributed to Gulf Power Company as soon as administratively practicable following the execution of this Second Amendment.
7.
Except as amended herein by this Second Amendment, the Trust shall remain in full force and effect as adopted by the Grantors prior to the adoption of this Second Amendment.

[SIGNATURES ON FOLLOWING PAGE]

3


IN WITNESS WHEREOF , the undersigned have executed this Second Amendment to the Trust Agreement as of the 21st day of December, 2018.


ALABAMA POWER COMPANY
 
MISSISSIPPI POWER COMPANY
By:
/s/Greg Barker
 
By:
/s/Jeffrey A. Stone
Name:
Greg Barker
 
Name:
Jeffrey A. Stone
Title:
EVP - Customer Service
 
Title:
Vice President & Corporate Secretary
 
 
 
 
 
GEORGIA POWER COMPANY
 
SOUTHERN COMPANY GAS
By:
/s/Meredith M. Lackey
 
By:
/s/Paul R. Shlanta
Name:
Meredith M. Lackey
 
Name:
Paul R. Shlanta
Title:
SVP, General Counsel & Corporate Secretary
 
Title:
SVP and General Counsel
 
 
 
 
 
GULF POWER COMPANY
 
SOUTHERN COMPANY
By:
/s/Jeffrey A. Stone
 
By:
/s/Myra C. Bierria
Name:
Jeffrey A. Stone
 
Name:
Myra C. Bierria
Title:
Vice President & Corporate Secretary
 
Title:
Secretary
 
 
 
 
 



4



ACKNOWLEDGMENT AND AGREEMENT
The undersigned, constituting all of the potential Beneficiaries related to Gulf Power Company, hereby acknowledge and agree to this Second Amendment as of the 21st day of December, 2018.

 
/s/Allan G. Bense
 
Allan G. Bense
 
 
 
/s/Deborah H. Calder
 
Deborah H. Calder
 
 
 
/s/Julian B. MacQueen
 
Julian B. MacQueen
 
 
 
/s/J. Mort O’Sullivan
 
J. Mort O’Sullivan
 
 
 
/s/Michael T. Rehwinkel
 
Michael T. Rehwinkel



Exhibit 10(b)2
Appendix A, Page 1
Southern Company System Intercompany Interchange Contract
Rate Schedule No. 138

APPENDIX A to the SOUTHERN COMPANY SYSTEM
INTERCOMPANY INTERCHANGE CONTRACT
 
This Appendix A (“Appendix A”) to the Southern Company System Intercompany Interchange Contract (“IIC”) is made and entered into as of January 1, 2019, by and between ALABAMA POWER COMPANY, GEORGIA POWER COMPANY, GULF POWER COMPANY, MISSISSIPPI POWER COMPANY, SOUTHERN POWER COMPANY and SOUTHERN COMPANY SERVICES, INC., being an amendment to provide for GULF POWER COMPANY’s orderly withdrawal from the IIC.

Article I – Recitals
Section 1.1: WHEREAS, ALABAMA POWER COMPANY, GEORGIA POWER COMPANY, GULF POWER COMPANY, MISSISSIPPI POWER COMPANY and SOUTHERN POWER COMPANY have for many years operated as an integrated electric utility system and have conducted their respective electric generating facilities and system operations (generally referred to as the “Pool”) pursuant to and in accordance with the provisions of this IIC, as most recently amended effective May 1, 2007; and
Section 1.2: WHEREAS, 700 Universe, LLC, a wholly owned subsidiary of NextEra Energy, Inc., will acquire from The Southern Company all of the common stock of GULF POWER COMPANY (“Transaction”); and
Section 1.3: WHEREAS, as a result of the Transaction, GULF POWER COMPANY will no longer be a subsidiary of The Southern Company or an affiliate of ALABAMA POWER COMPANY, GEORGIA POWER COMPANY, MISSISSIPPI POWER COMPANY and SOUTHERN POWER COMPANY (hereinafter the “SOUTHERN OPERATING COMPANIES”) after the closing of the Transaction; and
Section 1.4:    WHEREAS, by separate agreement, this Agreement will be filed with the Federal Energy Regulatory Commission pursuant to Federal Power Act section 205 with a request for an effective date that is the date of the closing of the Transaction (“Effective Date”); and
Section 1.5: WHEREAS, concurrently with the closing of the Transaction, GULF POWER COMPANY will submit a notice to terminate its participation under this IIC in accordance with Section 2.3 of the IIC (“Termination Notice”) and desires to withdraw from the IIC in an orderly manner; and
Section 1.6: WHEREAS, the SOUTHERN OPERATING COMPANIES wish to continue to operate under this IIC and provide for an orderly transition period whereby GULF POWER COMPANY terminates its participation under this IIC without disrupting the provision of reliable and cost-effective service to their customers or to customers in GULF POWER COMPANY’s service area, as it currently exists; and




Appendix A, Page 2
Southern Company System Intercompany Interchange Contract
Rate Schedule No. 138

Section 1.7: WHEREAS, GULF POWER COMPANY likewise wishes to provide for an orderly transition period whereby it terminates its participation under this IIC without disrupting the provision of reliable and cost-effective service to customers in its existing service area or to the customers of the SOUTHERN OPERATING COMPANIES; and
Section 1.8: WHEREAS, the principal objectives of the IIC are set forth in Article III of the IIC ; and

Section 1.9: WHEREAS, GULF POWER COMPANY desires to continue its participation in the IIC, subject to the terms and conditions set forth herein and therein, until GULF POWER COMPANY’s participation ends in accordance with this Appendix A (“Transition Period”); and
Section 1.10: WHEREAS, consistent with the foregoing, the SOUTHERN OPERATING COMPANIES, SOUTHERN COMPANY SERVICES, INC. (as the “AGENT”), and GULF POWER COMPANY (each referred to individually as a “Party” and collectively as the “Parties”) agree to the following provisions that, as part of the IIC, shall govern the ongoing respective rights and responsibilities as between (i) GULF POWER COMPANY and (ii) the SOUTHERN OPERATING COMPANIES and the AGENT, under the IIC during the Transition Period.
Article II – Effective Date, Term and Assignment
Section 2.1: This Appendix A and the associated Transition Period shall become effective concurrent with the closing of the Transaction. If for any reason the Transaction does not close, then this Appendix A shall be void and of no legal effect ab initio .
Section 2.2: Absent early termination or limited extension as provided herein, the Transition Period shall end at 11:59 pm (prevailing Central time) on the five-year anniversary of the Termination Notice (“Scheduled Termination Date”). After the Transition Period, GULF POWER COMPANY’s participation in this IIC will cease and this Appendix A shall no longer be of any force or effect. During the Transition Period, GULF POWER COMPANY shall have no further rights under Section 2.3 of the IIC.
Section 2.2.1: The Transition Period is subject to early termination in advance of the Scheduled Termination Date pursuant to Section 2.3 or Section 4.4.3 of this Appendix A.
Section 2.2.2: The Transition Period is subject to extension for a period of no more than two (2) additional years beyond the Scheduled Termination Date if GULF POWER COMPANY determines in its discretion it has not been able to establish its own balancing area, acquire the requisite balancing and related services, or establish electric generation and transmission facilities that enable GULF POWER COMPANY to provide the retail and wholesale customers in its current service area with electric services that are substantially comparable in terms of cost and reliability to those being provided to such




Appendix A, Page 3
Southern Company System Intercompany Interchange Contract
Rate Schedule No. 138

customers through its participation in this IIC. In that event, GULF POWER COMPANY shall provide written notice to the AGENT no later than one hundred eighty (180) days prior to the Scheduled Termination Date. Any such notice shall specify the basis for the extension and the duration of the needed extension of the Transition Period, not to exceed two (2) additional years following the Scheduled Termination Date.
Section 2.3: GULF POWER COMPANY shall have the unilateral right to accelerate the Transition Period and terminate its participation under this IIC, subject to at least one hundred eighty (180) days’ written notice.
Section 2.4: GULF POWER COMPANY may not assign its rights, interests or obligations under the IIC or this Appendix A, nor shall such rights, interests or obligations be extended to include obligations or resources of GULF POWER COMPANY resulting from a merger or acquisition involving another load-serving entity.
Article III – Modified Rights and Obligations of the Parties under the IIC
Section 3.1: Except as provided herein, the IIC shall remain in effect for the SOUTHERN OPERATING COMPANIES and GULF POWER COMPANY for the Transition Period, during which, and in accordance with this Appendix A, GULF POWER COMPANY shall be deemed an OPERATING COMPANY so as to effectuate the provisions of the IIC and the orderly termination of GULF POWER COMPANY’s participation under this IIC. Except as expressly addressed in this Appendix A, the rights of the SOUTHERN OPERATING COMPANIES or GULF POWER COMPANY as OPERATING COMPANIES under the IIC are not limited or affected.
Section 3.2: For purposes of GULF POWER COMPANY’s continued participation in the IIC during the Transition Period, the SOUTHERN OPERATING COMPANIES and the AGENT agree and commit not to treat GULF POWER COMPANY in a manner that is discriminatory (i.e., continue to apply the IIC on a comparable basis to all OPERATING COMPANIES).
Section 3.3: GULF POWER COMPANY shall no longer have a representative on the Operating Committee, but shall designate at least one official GULF POWER COMPANY contact who the AGENT shall inform of any proposed changes to the IIC or the policies, practices or procedures used in its implementation that may have a significant effect on GULF POWER COMPANY and of any other proposed actions of the Operating Committee in accordance with the Operating Committee’s duties under the IIC. GULF POWER COMPANY will be given reasonable prior notice of such proposed changes or actions so that it will have an opportunity to ask questions, seek additional information, and provide feedback in advance of any Operating Committee decision or the filing of any such change. The AGENT shall cooperate in good faith to answer any such questions, provide requested additional information and facilitate GULF POWER COMPANY’s feedback. Any dispute regarding a proposed action of the Operating Committee




Appendix A, Page 4
Southern Company System Intercompany Interchange Contract
Rate Schedule No. 138

(except for a proposed change to the IIC addressed in Section 4.2 of this Appendix A) shall be resolved through the dispute resolution process set forth in Section 4.1 of this Appendix A.
Section 3.4: GULF POWER COMPANY may make reasonable inquiries with the AGENT concerning any aspect of GULF POWER COMPANY's IIC monthly bill to ensure that the billing to GULF POWER COMPANY is accurate and determined in a manner that conforms to the IIC and the policies, practices and procedures used in its implementation, as applied on a comparable basis to all OPERATING COMPANIES. Any dispute in this regard shall be subject to Section 12.5 of the IIC and resolved through the dispute resolution process set forth in Section 4.1 of this Appendix A.
Section 3.5: Audit Rights related to IIC Billings
Section 3.5.1: GULF POWER COMPANY shall have the right to conduct or cause to be conducted, at its own expense, a reasonable audit of the data, records and other pertinent information specifically related to the correctness of IIC billings during the Transition Period. GULF POWER COMPANY’s audit rights are further subject to the following conditions:
(i)
Audits may be conducted from time to time, but no more frequently than once in any rolling twelve (12) month period.
(ii)
AGENT will be provided at least ten (10) business days’ advance notice of any such audit, which notice shall specify the time period of the audit and describe with reasonable specificity the records, information and data to be reviewed.
(iii)
No audit shall be conducted during the first week of any month.
(iv)
The audit will be conducted during normal business hours and in such a manner as to minimize disruptions to the AGENT and to the SOUTHERN OPERATING COMPANIES.
(v)
The time period covered by the audit may not exceed the twenty-four (24) months immediately preceding the notice and may not include any period already subject to an audit hereunder.
(vi)
GULF POWER COMPANY will observe the confidentiality obligations set forth in Section 3.6 to the extent the audit encompasses any information subject to those restrictions.
Section 3.5.2: If an audit reveals, and GULF POWER COMPANY provides the relevant audit report showing, calculation errors that resulted in overcharges or underpayments to GULF POWER COMPANY: (i) GULF POWER COMPANY shall notify the AGENT; (ii) the Parties will negotiate in good faith to reach an agreement with respect to the matter; and (iii) for agreed errors, there will be a correction in accordance with Section 12.5 of the IIC (or the AGENT shall promptly cause GULF POWER COMPANY to be




Appendix A, Page 5
Southern Company System Intercompany Interchange Contract
Rate Schedule No. 138

paid the amount of the overcharge or underpayment if there is no invoice on which to include the credit). Appropriate corrections or payments by GULF POWER COMPANY also will be made in the event the audit reveals calculation errors that resulted in undercharges or overpayments to GULF POWER COMPANY in its IIC billing.
Section 3.5.3: Any disputes arising from an audit under this Section 3.5 shall be resolved through the dispute resolution process set forth in Section 4.1 of this Appendix A and Section 12.5 of the IIC. If the arbitration upholds the results of the audit and identifies material errors resulting in overcharges or underpayments, the AGENT shall bear the reasonable costs of the audit. For purposes of this provision, a material error is one in which the effect of the erroneous charge or payment on GULF POWER COMPANY is more than ten (10) percent of the monthly average of the sum of the gross IIC billings to GULF POWER COMPANY, as measured over the ten (10) months preceding discovery.
Section 3.6: Consistent with a fundamental premise of the IIC that each OPERATING COMPANY is expected to have adequate resources to reliably serve its own obligations, GULF POWER COMPANY, through its official contact, shall provide the AGENT, not less than annually, sufficient information (e.g., generation expansion plan) to demonstrate GULF POWER COMPANY’s compliance with such expectation for the duration of the Transition Period.
Section 3.7: During the Transition Period, the Parties shall abide by the following information restrictions:
Section 3.7.1: GULF POWER COMPANY may have access to information regarding the operation of its own plants or other generation resources (such as those acquired by contract) that it has committed to the Pool, but it may not have access to confidential or proprietary information of the SOUTHERN OPERATING COMPANIES, including information regarding the operation of Pool resources of the SOUTHERN OPERATING COMPANIES, except as expressly provided in Section 3.7.2.
Section 3.7.2: For confidential or proprietary information of the SOUTHERN OPERATING COMPANIES that is already in GULF POWER COMPANY’s possession or for which access is unintended or unavoidable (e.g., Energy Management System (“EMS”) information), GULF POWER COMPANY will not, directly or indirectly, share (and will take steps to prevent any sharing of) such information with anyone including, but not limited to, wholesale marketing function employees of GULF POWER COMPANY, any of its affiliates, and SOUTHERN POWER COMPANY.
Section 3.7.3: Information provided to the AGENT in accordance with Section 3.6 of this Appendix A: (i) may be shared with SCS personnel responsible for reviewing and aggregating the individual generation expansion plans of all Pool participants in order to present the aggregate generation expansion plan to the Operating Committee for its review and recommendation pursuant to IIC Section 3.6; (ii) may not be shared more




Appendix A, Page 6
Southern Company System Intercompany Interchange Contract
Rate Schedule No. 138

broadly with other employees of the SOUTHERN OPERATING COMPANIES without the prior consent of GULF POWER COMPANY; and (iii) may not be shared with any wholesale marketing function employees of either SCS or the SOUTHERN OPERATING COMPANIES. In accordance with Section 5.2 of the IIC, SOUTHERN POWER COMPANY will continue to have no access to information regarding the operation of Pool resources of the other OPERATING COMPANIES, including GULF POWER COMPANY.
Section 3.8: During the Transition Period, SCS (or any replacement AGENT designated by the SOUTHERN OPERATING COMPANIES) shall continue to serve as AGENT for GULF POWER COMPANY for purposes of its participation in this IIC.
Section 3.9: For permissible longer-term wholesale transactions (i.e., outside of the period defined in Section 9.4.2 of the IIC), GULF POWER COMPANY must use its own personnel (staff) separate from the personnel (staff) that conducts similar activities on behalf of the SOUTHERN OPERATING COMPANIES.
Section 3.10: In lieu of IIC Article XI, the transmission service necessary to effectuate GULF POWER COMPANY’s continued participation in this IIC during the Transition Period shall be provided in accordance with Commission-approved transmission arrangements for ALABAMA POWER COMPANY, GEORGIA POWER COMPANY, and MISSISSIPPI POWER COMPANY and for GULF POWER COMPANY, as described in the Transmission Service Coordination Agreement.
Article IV – Enforcement and Remedies
Section 4.1: GULF POWER COMPANY’s exclusive rights and remedies associated with its continued participation in the IIC involve: (i) challenges to Operating Committee decisions or actions or proposed actions (as described in Section 3.3, specifically excluding decisions to file an amendment to the IIC, as addressed in Section 4.2) on grounds that the challenged action is inconsistent with the principle objectives of the IIC as set forth in Article III thereof; (ii) claims that the AGENT is not applying the IIC (including underlying policies, practices or procedures used in its implementation) on a comparable basis to all OPERATING COMPANIES (as described in Sections 3.2 and 3.4); (iii) claims that the AGENT is not properly billing under the IIC; and (iv) claims that the SOUTHERN OPERATING COMPANIES are in material breach of their obligations under the IIC. With respect to any such matters, the following dispute resolution procedures shall govern:
Section 4.1.1: GULF POWER COMPANY must first discuss any questions, concerns or objections (“Issue”) with the AGENT. In connection with such discussions, the AGENT must be afforded a reasonable amount of time to understand and investigate the Issue, including any needed data collection. Unless otherwise agreed, this initial step with the AGENT shall not extend beyond thirty (30) days to address the Issue.




Appendix A, Page 7
Southern Company System Intercompany Interchange Contract
Rate Schedule No. 138

Section 4.1.2: If the Issue is not addressed by the AGENT to GULF POWER COMPANY’s satisfaction within thirty (30) days, then GULF POWER COMPANY shall provide written notice to the AGENT describing the Issue and why the AGENT’s response has been deemed unsatisfactory by GULF POWER COMPANY.  Within ten (10) days after the delivery of the notice, a senior official of the SOUTHERN OPERATING COMPANIES and of GULF POWER COMPANY, each with authority to negotiate and resolve the Issue, shall meet, either in person or by telephonic conference, in an effort to resolve the Issue through mutual agreement.  A representative of the AGENT may participate in this meeting. If the Issue has not been resolved within ten (10) days after the meeting of senior officials, then GULF POWER COMPANY may invoke arbitration in accordance with Section 4.1.3.
Section 4.1.3: In the event resolution is not obtained pursuant to Section 4.1.2, the Parties agree that the dispute shall be resolved through binding arbitration. The Parties will cooperate in the arbitration process (including scheduling) so that the Issue will be resolved as quickly as practicable, with due regard for its nature and complexity. Except as provided herein or otherwise agreed by the Parties, the arbitration shall be administered by the American Arbitration Association in accordance with its Commercial Arbitration Rules.
(i)
The arbitration panel shall comprise three (3) members, with each Party selecting one member and the two members so named selecting the third member.
(ii)
All members must have at least fifteen (15) years of experience in the areas of electric energy and power system operations.
(iii)
All members must be neutral, act impartially, and be free from any conflict of interest (financial or otherwise, with no prior or present business or personal relationship with the Parties).
(iv)
After selection, the members shall have no ex-parte communications with either Party.
(v)
The arbitration and all related information shall be private and confidential, with no disclosure except as required by law or by agreement of the Parties.
(vi)
The arbitration shall be held in Orlando, Florida.
(vii)
The Party invoking arbitration bears the burden of proof.
(viii)
Each Party shall bear its own internal costs (e.g., employees, attorneys and consultants), but the losing Party shall also be responsible for costs otherwise associated with the arbitration process.
Section 4.2: In the event GULF POWER COMPANY, having been informed of a proposed change to the IIC in accordance with Section 3.3, remains opposed to such proposed change, its




Appendix A, Page 8
Southern Company System Intercompany Interchange Contract
Rate Schedule No. 138

opposition shall not be the subject of dispute resolution under Section 4.1 and shall not prohibit the AGENT from filing for FERC acceptance of the proposed change. However, in response to that filing, GULF POWER COMPANY may raise its objections with FERC and shall not be prejudiced by the fact that SCS is otherwise its AGENT for purposes of the IIC. Conversely, the AGENT and the SOUTHERN OPERATING COMPANIES shall not be limited in their ability to support the proposed revision as just and reasonable.
Section 4.3: The Parties expressly acknowledge and agree that GULF POWER COMPANY’s sole and exclusive remedy for any Issue raised under Section 4.1 is pursuant to the provisions set forth therein. Notwithstanding the foregoing, and without any prejudice to or waiver thereof, in the event GULF POWER COMPANY attempts to bring a proceeding before the FERC regarding any provision of the IIC (including this Appendix A), or any issues related to application or implementation, and such proceeding is not otherwise dismissed, the standard of review to be applied in any such proceeding shall be the most stringent standard permissible under applicable law, as set forth in United Gas Pipe Line Co. v. Mobile Gas Service Corp ., 350 U.S. 332 (1956); Federal Power Commission v. Sierra Pacific Power Co ., 350 U.S. 348 (1956), as clarified in Morgan Stanley Capital Group, Inc. v. Public Utility District No. 1 of Snohomish County, Washington , 554 U.S. 527 (2008), and refined in NRG Power Marketing v. Maine Public Utilities Commission , 130 S. Ct. 693, 700 (2010).
Section 4.4: In the event the AGENT, on behalf of the SOUTHERN OPERATING COMPANIES, believes there has been a material breach by GULF POWER COMPANY to comply with its obligations under the IIC or this Appendix A, the following procedures shall apply:
Section 4.4.1: The AGENT shall notify GULF POWER COMPANY of any concerns regarding potential alleged breaches. GULF POWER COMPANY shall be afforded a reasonable amount of time to understand and investigate the concern and, unless otherwise agreed, shall have up to thirty (30) days to address any such concerns.
Section 4.4.2: If such concerns are not addressed by GULF POWER COMPANY to the AGENT’s satisfaction, the AGENT shall so notify GULF POWER COMPANY in writing, describing the alleged breach and why GULF POWER COMPANY’S response has been deemed unsatisfactory by the AGENT.  Within ten (10) days after the delivery of the notice, a senior official of the AGENT and of GULF POWER COMPANY, each with authority to negotiate and resolve the concern, shall meet, either in person or by telephonic conference, in an effort to resolve the concern through mutual agreement.  If the concern has not been resolved within ten (10) days after the meeting of senior officials, then the AGENT may invoke arbitration in accordance with Section 4.4.3.
Section 4.4.3: In the event the AGENT invokes arbitration, the procedures set forth in Section 4.1.3 shall apply. In the event the arbitration concludes that GULF POWER COMPANY is in




Appendix A, Page 9
Southern Company System Intercompany Interchange Contract
Rate Schedule No. 138

material breach, then GULF POWER COMPANY shall have thirty (30) days to cure such failure, which cure must be to the AGENT’s reasonable satisfaction. In the event GULF POWER COMPANY elects not to cure, or fails to cure, the AGENT may give one hundred and eighty (180) days’ written notice to terminate the Transition Period and GULF POWER COMPANY shall thereafter have no further participation under this IIC.
[Remainder of page intentionally left blank]




Appendix A, Page 10
Southern Company System Intercompany Interchange Contract
Rate Schedule No. 138


IN WITNESS WHEREOF, the Parties hereto have caused this instrument to be signed by their duly authorized representatives, which signatures may be set forth on separate counterpart pages.

GULF POWER COMPANY
 
ALABAMA POWER COMPANY
By:
/s/Michael Smith
 
By:
/s/Jim Heilbron
 
Its:  Gen. Mgr. - Gulf
 
 
Its:  SVP/SPO - West
 
 
 
 
 
GEORGIA POWER COMPANY
 
MISSISSIPPI POWER COMPANY
By:
/s/Allen Reaves
 
By:
/s/Jim Heilbron
 
Its:  SVP/SPO - East
 
 
Its:  SVP/SPO - West
 
 
 
 
 
SOUTHERN POWER COMPANY
 
SOUTHERN COMPANY SERVICES, INC.
By:
/s/Dana Claburn
 
By:
/s/Scott Teel
 
Its:  SVP/SPO
 
 
Its:  SVP Commercial Operations
 
 
 
 
 


[END OF APPENDIX A]



Exhibit 10(c)10

Georgia Power Company has requested confidential treatment for certain portions of this document pursuant to an application for confidential treatment sent to the Securities and Exchange Commission. Georgia Power Company has omitted such portions from this filing and filed them separately with the Securities and Exchange Commission. Such omissions are designated as “[***].”

CONFIDENTIAL AND PROPRIETARY


AMENDMENT NO. 1
TO
CONSTRUCTION COMPLETION AGREEMENT
BETWEEN
GEORGIA POWER COMPANY, FOR ITSELF AND AS AGENT
FOR OGLETHORPE POWER CORPORATION (AN ELECTRIC
MEMBERSHIP CORPORATION), MUNICIPAL ELECTRIC
AUTHORITY OF GEORGIA, AND THE CITY OF DALTON,
GEORGIA, MEAG POWER SPVM, LLC, MEAG POWER SPVP, LLC, AND THE CITY OF DALTON, GEORGIA, ACTING BY AND THROUGH ITS BOARD OF WATER, LIGHT AND SINKING FUND COMMISSIONERS, AS OWNERS
AND
BECHTEL POWER CORPORATION
DATED AS OF OCTOBER 12, 2018




CONFIDENTIAL AND PROPRIETARY

AMENDMENT NO. 1 TO
CONSTRUCTION COMPLETION AGREEMENT
This AMENDMENT NO. 1 (this “ Amendment ”) TO THE CONSTRUCTION COMPLETION AGREEMENT, dated October 23, 2017 (together with the Exhibits thereto, as amended, the “ Agreement ”), by and between GEORGIA POWER COMPANY, a Georgia corporation (“ GPC ”), acting for itself and as agent for OGLETHORPE POWER CORPORATION (AN ELECTRIC MEMBERSHIP CORPORATION), an electric membership corporation formed under the laws of the State of Georgia, MUNICIPAL ELECTRIC AUTHORITY OF GEORGIA, a public body corporate and politic and an instrumentality of the State of Georgia, MEAG Power SPVJ, LLC, MEAG Power SPVM, LLC, MEAG Power SPVP, LLC, each a Georgia limited liability company, and THE CITY OF DALTON, GEORGIA, an incorporated municipality in the State of Georgia acting by and through its Board of Water, Light and Sinking Fund Commissioners (hereinafter referred to individually and collectively as “ Owners ”), and BECHTEL POWER CORPORATION, a Nevada corporation (“ Contractor ”), is entered into as of the 14 th day of October, 2018. Owners and Contractor are individually referred to herein as a “ Party ” and collectively referred to herein as the “ Parties .”
RECITALS
WHEREAS, Owners are presently developing and constructing two new nuclear plant units and related facilities, structures and improvements at the Vogtle plant site in Georgia, which units are designated as Vogtle Units 3 and 4;
WHEREAS, Owners and Contractor entered into the Agreement, as of October 23, 2017, for Contractor to provide certain services in order for Owners to complete the construction of the Vogtle Units 3 and 4, pursuant to the terms and conditions set forth in the Agreement;
WHEREAS, Owners and Contractor have agreed to revise certain provisions of the Agreement in connection with the Parties’ completion of the first stage of the Subcontract Scope Alignment Process contemplated by Section 3.2.3 of the Agreement, as further set forth in this Amendment;
WHEREAS, the Parties agree that, with the exception of the changes expressly stated herein, this Amendment will not change the terms and conditions of the Agreement.
NOW, THEREFORE, in consideration of the recitals, the mutual promises herein and other good and valuable consideration, the receipt and sufficiency of which the Parties acknowledge, the Parties, intending to be legally bound, stipulate and agree as follows:
ARTICLE I
AMENDMENTS TO AGREEMENT
Section 1.1      In Section 1.1 of the Agreement, the following definitions of “Bankruptcy Event” and “Bankruptcy MAI” shall be inserted immediately after the definition of “ASME” and immediately preceding the definition of “Base Fee”:
Bankruptcy Event ” has the meaning set forth in Section 3.4.1.



CONFIDENTIAL AND PROPRIETARY

Bankruptcy MAI ” has the meaning set forth in Section 3.4.1(i).
Section 1.2      In Section 1.1. of the Agreement, the following definition of “Below-Threshold Adjustment Event” shall be inserted immediately after the definition of “Baseline Schedule” and immediately preceding the definition of “BEO”:
Below-Threshold Adjustment Event ” has the meaning set forth in Section 11.3(ii).
Section 1.3      In Section 1.1 of the Agreement, the following definition of “CBI Subcontract” shall be inserted immediately after the definition of “Cash Security” and immediately preceding the definition of “Change Order”:
CBI Subcontract ” shall mean SNC Purchase Contract No. 56600 between Southern Nuclear Operating Company, Inc. and CBI Services, LLC dated March 5, 2018.
Section 1.4      In Section 1.1 of the Agreement, the following definition of “Field Indirects” shall be inserted immediately after the definition of “Fee” and immediately preceding the definition of “Final Completion”:
Field Indirects ” means the costs associated with indirect craft labor and materials required to support construction completion. For the avoidance of doubt, Field Indirects do not include any Construction Equipment.
Section 1.5      Not Used
Section 1.6      In Section 1.1 of the Agreement, the following definition of “Conversion Date” shall be inserted immediately after the definition of “Contractor Trend Program” and immediately preceding the definition of “Core Scope”:
Conversion Date ” has the meaning set forth in Section 3.4.1(v).
Section 1.7      Article 3 is amended by inserting the following new Section 3.4 immediately following Section 3.3.5 and immediately preceding Article 4 as follows:
3.4      CBI Subcontract

3.4.1      For the CBI Subcontract that is designated a Contractor-Managed Subcontract as of the date of this Amendment, in the event that CBI Services, LLC or its successor(s) files for or is involuntarily put into bankruptcy (a “Bankruptcy Event”), the Parties agree to the following process for Contractor to obtain adjustments to the Target Completion Dates, the Baseline Schedule and/or Target Construction Cost :
i.
Contractor shall provide written notice to Owners of the occurrence of a Bankruptcy Event that: (i) has caused or will cause a material adverse impact on Contractor’s, Contractor’s Subcontractor’s and/or Contractor-Managed Subcontractor’s ability to perform its work in accordance with the Project Schedule in effect as of the Bankruptcy Event and causes a delay to the critical path in the Project Schedule for

2

CONFIDENTIAL AND PROPRIETARY

achievement of either or both Unit Mechanical Completion Dates or (ii) has caused or will cause a material increase to the Combined Construction Costs (either (i) or (ii), a “Bankruptcy MAI”), (provided, however, for purposes of determining whether a Bankruptcy MAI has occurred, the fact that the Bankruptcy Event was or could be attributable to the acts or omissions of CBI Services, LLC or its personnel shall not be considered or in any way disqualify the Bankruptcy Event as justification for the adjustments contemplated by this Section 3.4). Such notice shall be provided as promptly following such Bankruptcy MAI as practicable, but, (and notwithstanding Section 10.4.1 or Section 11.4.1) in any case, within fourteen (14) Days of the Bankruptcy MAI; provided, however, that failure to timely provide such notice shall not preclude Contractor’s rights hereunder with respect to such Bankruptcy MAI. Contractor shall provide all available information related to the Bankruptcy MAI promptly as it becomes available to Contractor. After Owners’ receipt of such notice, the Parties shall have ninety (90) days to negotiate an adjustment to Contractor’s Target Completion Dates, the Baseline Schedule and/or Target Construction Cost, as applicable such that Contractor is not materially adversely impacted by the Bankruptcy Event.
ii.
If Owners do not agree that a Bankruptcy MAI occurred, Owners shall initiate the dispute resolution process set forth in Article 38 of this Agreement within thirty (30) days after Owners’ receipt of the notice from Contractor under Section 3.4.1(i). The sole issue for determination by the DRB shall be whether a Bankruptcy MAI occurred (and not the amount of any adjustments to the Target Completion Dates, the Baseline Schedule and/or the Target Construction Cost that Contractor claims). In the DRB proceeding, Contractor shall have the same burden of proof as would apply for a Change Order dispute under this Agreement.
iii.
If the DRB determines that a Bankruptcy MAI did not occur, the CBI Subcontract shall remain a Contractor-Managed Subcontract and Contractor shall not be entitled to any adjustment to the Target Completion Dates, the Baseline Schedule and/or Target Construction Cost at such time; provided, however, such a finding shall be without prejudice to Contractor’s right to notify Owners of a future Bankruptcy MAI associated with the same Bankruptcy Event if additional impacts to Contractor result therefrom.
iv.
If the DRB determines that a Bankruptcy MAI occurred, or if Owners did not disagree that a Bankruptcy MAI occurred pursuant to subpart (ii) above, the Parties shall continue to negotiate equitable adjustments to the Target Completion Dates, the Baseline Schedule and/or Target Construction Cost (consistent with any applicable provisions of this Agreement governing such adjustments but without limiting the rights of either of the Parties under this Section 3.4) for the ninety (90) day period contemplated above by subpart (i). Any such adjustments agreed

3

CONFIDENTIAL AND PROPRIETARY

upon during this negotiation period promptly shall be incorporated into a Change Order executed by the Parties.
Notwithstanding the foregoing, the Parties agree that the ultimate duration and outcome of a Bankruptcy Event may not be known within ninety (90) days of a Bankruptcy MAI. Accordingly, the Parties agree that the impacts resulting from the Bankruptcy Event may be ongoing and may result in multiple Change Orders or modifications to a Change Order following the process set forth herein as the impacts are realized over time, notwithstanding Section 12.6 of the Agreement or any other provision of this Amendment or the Agreement to the contrary. The process is intended to be repeated, as necessary, to address the impacts of the Bankruptcy Event.
v.
If the Parties cannot agree on the above adjustments within the ninety (90) day period set forth above in subpart (i), the CBI Subcontract shall convert to an Owner-Managed Subcontract on the ninety-first (91 st ) day; provided, however, the ninety (90) day period set forth in subpart (i) above shall be tolled during the pendency of any dispute under subpart (ii) above or may be extended by mutual agreement of the Parties. The conversion to an Owner-Managed Subcontract shall be deemed to occur on the date of Contractor’s notice under subpart (i) above in the event that either the Owner did not disagree that a Bankruptcy MAI occurred or that the DRB determines the Bankruptcy MAI occurred (the “Conversion Date”). Contractor shall then be entitled to seek (and Owners will be entitled to contest) any adjustments to the Target Construction Cost and/or Target Completion Dates and Baseline Schedule under the Agreement based on the CBI Subcontract being an Owner-Managed Subcontract from the Conversion Date; provided, the start date for purposes of the deadlines for submittals required under Sections 10.4 and 11.4 shall be tolled until the actual date (on or after the 91 st day) on which the CBI Subcontract is converted to an Owner-Managed Subcontract (as opposed to the Conversion Date above). As a result of this conversion, the Parties shall execute a Change Order reducing: (i) the Target Construction Cost to account for the conversion of the CBI Subcontract as of the Conversion Date (including, in addition to the direct value associated with remaining scope, removal of a portion of the following to the extent such amounts support the remaining scope of the CBI Subcontract: (a) Contractor’s contingency, and (b) Field Indirects); and (ii) Contractor’s Earned Fee calculated at [***] ([***]) of the amount deducted in the immediately preceding subsection (i). This deductive Change Order will not limit Contractor’s ability to pursue Change Order(s) associated with the cost and schedule impacts related to the CBI Subcontract as an Owner-Managed Subcontract.
vi.
At all times prior to any conversion (actual conversion, not the deemed Conversion Date), Contractor shall continue to manage the CBI Subcontract as a Contractor-Managed Subcontract. Following actual

4

CONFIDENTIAL AND PROPRIETARY

conversion, Contractor shall continue to support mitigation efforts and the transition of CBI Subcontract scope to Owners, but Owners shall have sole authority to direct the actions of CBI Services, LLC following the conversion.
3.4.2    The Parties shall develop a mitigation plan for a Bankruptcy Event, which may include Contractor and/or Southern Nuclear obtaining necessary ASME N-Stamp(s) and construction and engineering planning for transfer of the CBI Subcontract scope to other parties. Contractor shall support development and implementation of this mitigation plan to the extent permitted under applicable Law, and all associated costs shall be Excluded Costs.
Section 1.8      Not Used
Section 1.9      Section 10.2(i) is hereby modified by removing the word “and” after the semicolon.
Section 1.10      Section 10.2(ii) is hereby modified by inserting “and Section 10.3” after the reference to “Section 10.4” and by deleting the period and adding “; and” in its place.
Section 1.11      Section 10.2 shall be amended to add a new subsection (iii) immediately following 10.2(ii) as follows:
(iii)     adjustments under Section 3.4.1(iv) (negotiated adjustments that do not result in conversion of the CBI Subcontract to an Owner-Managed Subcontract) following a Bankruptcy Event, in accordance with the procedure and applicable standards set forth in Section 3.4.1.
Section 1.12      Section 11.2(ii) is hereby modified by removing the word “and” after the semicolon and by inserting “and Section 11.3” after the reference to “Section 11.4”.
Section 1.13      Section 11.2(iii) is hereby modified by deleting the period and adding “; and” in its place.
Section 1.14      Section 11.2 shall be amended to add a new subsection (iv) immediately following 11.2(iii) as follows:
(iv)     adjustments under Section 3.4.1(iv) (negotiated adjustments that do not result in conversion of the CBI Subcontract to an Owner-Managed Subcontract) following a Bankruptcy Event, in accordance with the procedure and applicable standards set forth in Section 3.4.1.
Section 1.15      Section 11.3 shall be amended by adding the following text after the last sentence.
Without limiting the application of any other provision regarding claims for adjustments to the Target Construction Cost, to the extent Contractor believes it is entitled to an adjustment for Field Indirects resulting from an Adjustment Event, the following provisions shall apply:

5

CONFIDENTIAL AND PROPRIETARY

(i)
If the requested Target Construction Cost adjustment for an individual Adjustment Event (excluding Field Indirects) is greater than [***] dollars ($[***]), Contractor may include the Field Indirect costs associated with the Adjustment Event in the Change Order request associated with such Adjustment Event submitted under Section 11.4.
(ii)
If the requested Target Construction Cost adjustment for an individual Adjustment Event (excluding Field Indirects) is less than or equal to [***] dollars ($[***]) (“Below-Threshold Adjustment Event”), an adjustment for Field Indirects will be deferred. Field Indirects will be excluded from any Change Order issued in connection with the Below-Threshold Adjustment Event; however, such Change Order may include a reservation with respect to deferred Field Indirects. When the cumulative value of Below-Threshold Adjustment Events (events for which a Change Order has been issued) exceeds [***] dollars ($[***]) in the aggregate, Contractor may then submit a Change Order request under Section 11.4 for such unpaid aggregate amount of all Field Indirects associated with such Below-Threshold Adjustment Events, notwithstanding Section 12.6 or any other statement regarding Change Order finality set forth herein, but subject to substantiation of the entitlement to the appropriate percentage used for each Below-Threshold Adjustment Event. Following such adjustment, Contractor will not be entitled to further adjustments for Field Indirects associated with the Below-Threshold Adjustment Events that were aggregated to reach the [***] dollar ($[***]) threshold. The process of aggregating the overall cost impacts of Below-Threshold Adjustment Events to [***] dollars ($[***]), and then submitting Change Order requests for Field Indirects may be repeated throughout the Project; provided, nothing in this section shall allow for double counting of Field Indirects.
Section 1.16      The first sentence of Section 12.1 shall be amended by adding the words “or scope to be performed under a Contractor-Managed Subcontract” after the word “hereunder” and before the parenthetical.
Section 1.17      The list of Target Assumptions in Exhibit B shall be amended by adding a new section 7 after section 6:
7.
Contract-specific Target Assumptions applicable to individual Contractor-Managed Subcontracts are set forth in Exhibit B, Table 12. Such Target Assumptions apply only with respect to the corresponding Contractor-Managed Subcontract.
Section 1.18      Exhibit B shall be amended by adding the new Table 12 set forth in Attachment 1 to this Amendment following Table 11.

6

CONFIDENTIAL AND PROPRIETARY

ARTICLE II
MISCELLANEOUS
Section 2.1      Capitalized terms used herein and not defined herein have the meanings assigned in the Agreement.
Section 2.2      This Amendment shall be construed in connection with and as part of the Agreement, and all terms, conditions, and covenants contained in the Agreement, except as herein modified, shall be and shall remain in full force and effect. The Parties hereto agree that they are bound by the terms, conditions, and covenants of the Agreement as amended hereby.
Section 2.3      This Amendment may be executed simultaneously in two or more counterparts, each of which shall be deemed an original but all of which together shall constitute one and the same instrument.
Section 2.4      The validity, interpretation, and performance of this Amendment and each of its provisions shall be governed by the internal Laws of the State of Georgia, without giving effect to the principles thereof related to conflicts of Laws.
Section 2.5      Except as expressly provided for in this Amendment, all other Articles, Sections and Exhibits of and to the Agreement remain unchanged.
[Signature page follows on the next page.]

7



IN WITNESS WHEREOF, the Parties have duly executed this Amendment as of the date first above written.
 
BECHTEL POWER CORPORATION
 
 
 
 
By:
/s/Tyrone P. Troutman, Jr.
 
Name:
Tyrone P. Troutman, Jr.
 
Title:
Principal Vice President
 
 
 
 
GEORGIA POWER COMPANY, as an Owner and as agent for the other Owners
 
 
 
 
By:
/s/David L. McKinney
 
Name:
David L. McKinney
 
Title:
Sr. VP Nuclear Development
 
 
 



[CCA Amendment No. 1 Signature Page]

CONFIDENTIAL AND PROPRIETARY

AMENDMENT NO. 1 TO THE CONSTRUCTION COMPLETION AGREEMENT
ATTACHMENT 1


Exhibit B - Target Assumption

Table 12. Contractor-Managed Subcontract Scope Target Assumptions
Contract #
Contractor
Title / Scope Description
Target Assumption
1430
Recon
Dewatering
[***]
1456
Garney
River Water Intake Structure
[***]
1466
Mistras
NDE Testing
[***]
1612
PCI
Specialized Field Machining
[***]
1614
NASS
Transformer Dress-Out
[***]
1615
VFC
Lightning Protection
[***]
1622
HSG Formwork
Form Work Design and Rental
[***]
1625
SSMI
HVAC Fab & Installation Unit 3 & 4
[***]
1637
AMECo
Small Tools
[***]
1802
Ashmore
Concrete Pump Trucks
[***]

CCA Amendment No. 1
Attachment 1
Page 1 of 5



Table 12. Contractor-Managed Subcontract Scope Target Assumptions
1803
Superheat FGH Services
Post Weld Heat Treatment
[***]
1806
AMECo/Penn Tools
Special High Value Tools
[***]
1808
Sarens Group
Heavy Haul
[***]
1811
Thyssen Krupp
Traction elevators (14 Elevators)
[***]
1812
FE Moran
Annex, DG, Radwaste, Turbine, Yard Area Transformers Fire Detection & Suppression
[***]
1814
Caddell
SWS Chemical Treatment Building
[***]
1817
Commercial Siding and Maintenance
Metal Siding, Units 3 & 4
[***]
1819
PCI-Promotec
Penetration Seals (Blockouts & Barriers)
[***]
1876
TBD
HVAC U3 & 4 Testing / Balance
[***]
1886
nexAir
Construction Air Services - On site
[***]
2096
Alimac Hek
Rack & Pinion Elevators (2 Elevators)
[***]

Amendment No. 1
Attachment 1
Page 2 of 5



Table 12. Contractor-Managed Subcontract Scope Target Assumptions
2108
TurbinePro
Turbine Assembly
[***]
2377
Research Cottrel
Water intake CWIS
[***]
2387
CORE
Medical Management Services
[***]
2559
FE Moran
Aux Bldg. and Cntnmnt Fire Prot. / Detect.
[***]
2570
Transco
MRI Specialty Installation
[***]
1421/1806
AMEC
Concrete and Soils Testing
[***]
1631
Augusta Industrial
Spill Clean-up, Animal Removal, Lift Station PM & Service, BFP Valve Inspect
[***]
1878 / 1632 / 2100 / 2400 / 1627
CB & I Services
Craft Support for MAB, Shield Building - CV20 Module, Air inlet retention, roof, HVAC Duct Work Installation, Field Erected Tanks - EPC (12 tanks)
[***]
2553 / 2567
CA Murren
RWI Structure Work - Phase III - dredging * complete derm surfacing, channel, pavement
[***]
1815
API
Insulation Unit 3 & Unit 4 (conventional)
[***]
1464
Williams Plant Services
Pre-engineered Composite Metal Studded Wall Systems
[***]

Amendment No. 1
Attachment 1
Page 3 of 5



Table 12. Contractor-Managed Subcontract Scope Target Assumptions
1818
Pullman Power
Membrane Roofing
[***]
2606
EBI
Cable Bus and ISO Phase Installation
[***]
2554/2376
PCI
Nuclear Steam System Supply (NSSS)
[***]
2607
TBD
SWS Cooling Tower Site Installation
[***]
1399
Morgan Corp
Excavation NI - misc. earth work as needed
Non Nuclear Safety
[***]
1618
Williams Specialty
Coatings, Fireproofing
[***]
1804/1805
Thompson Industrial
Area 3&4 Support, HP Hydrolaz, Line Clean & Video Inspect
[***]
2092
Direct Hire
Diesel Generator Building U3&4
[***]
2114
Direct Hire
Metrology & Survey Services
[***]
2551
Direct Hire
Transformer Pads
[***]
 
Direct Hire
Membrane Roofing scope not awarded to Subcontractor
[***]

Amendment No. 1
Attachment 1
Page 4 of 5



Table 12. Contractor-Managed Subcontract Scope Target Assumptions
 
Direct Hire
Excavation Direct Hire
[***]
 
Direct Hire
Architectural Finishes
[***]
1452
Direct Hire
Underground HDPE Pipe Installation
[***]
1822
Direct Hire
Annulus Seal - Waterproof Sealants
[***]
2601
Direct Hire
Gas & Communication Duct Bank
[***]
TBD
Direct Hire
Surveying
[***]


Amendment No. 1
Attachment 1
Page 5 of 5
CONFIDENTIAL


Exhibit 10(c)12
GLOBAL AMENDMENTS TO
VOGTLE ADDITIONAL UNITS AGREEMENTS

This Global Amendments to Vogtle Additional Units Agreements, dated as of February 18, 2019 (“ Global Amendment ”), is by and among GEORGIA POWER COMPANY , a corporation organized and existing under the laws of the State of Georgia (“ GPC ”), OGLETHORPE POWER CORPORATION (AN ELECTRIC MEMBERSHIP CORPORATION) , an electric membership corporation formed under the laws of the State of Georgia (“ OPC ”), MUNICIPAL ELECTRIC AUTHORITY OF GEORGIA , a public body corporate and politic and an instrumentality of the State of Georgia (“ MEAG ”), MEAG POWER SPVJ, LLC , MEAG POWER SPVM, LLC , MEAG POWER SPVP, LLC , each a Georgia limited liability company (collectively, the “ MEAG SPVs ”), and THE CITY OF DALTON, GEORGIA , an incorporated municipality in the State of Georgia acting by and through its Board of Water, Light and Sinking Fund Commissioners d/b/a Dalton Utilities (“ Dalton ”) (GPC, OPC, MEAG, the MEAG SPVs and Dalton hereinafter referred to individually as a “ Party ” and collectively called the “ Parties ”).
WITNESSETH
WHEREAS , GPC, OPC, MEAG, the MEAG SPVs and Dalton entered into the agreements set forth in Appendix A in connection with the development, construction, licensing, startup, operation, maintenance, and decommissioning of two new nuclear generating units at the Vogtle Electric Generating Plant in Burke County, GA (collectively, the “ Additional Units Agreements ”); and
WHEREAS , in connection with the continuation of construction of the Additional Units, the Parties have agreed to amend certain of the Additional Units Agreements as set forth in this Global Amendment;
NOW, THEREFORE , in consideration of the recitals, the mutual promises herein and other good and valuable consideration, the receipt and sufficiency of which the Parties acknowledge, the Parties, intending to be legally bound, acknowledge, stipulate and agree as follows:
Section 1.0    Amendments to Agreement and Amendment.
1.1     Section 2.1(a)(iii) of the Agreement and Amendment (as defined in item 12 of Appendix A ) is deleted and replaced with the following:
(iii)
(1) any (A) decision by the Georgia Public Service Commission (“ GPSC ”) to disapprove any portion of GPC’s share of the total Project investment or GPC’s associated financing costs in excess of the first 6% of such investment and financing costs for any six-month VCM reporting period or (B) determination by the GPSC during its review of GPC’s Seventeenth Semi-Annual Construction Monitoring Report, Request for Approval of the Expenditures Made between January 1, 2017 and June 30, 2017, and Request for Approval of the Revised Project Cost Estimates and Construction Schedule Pursuant to O.C.G.A. § 46-3A-7(b), submitted by GPC



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to the GPSC August 31, 2017 (“ VCM 17 ”) review, or at any time thereafter, (i) that any of GPC’s share of the total Project investment or GPC’s associated financing costs (except those already specified in GPSC’s December 20, 2016, Order Adopting Stipulation, filed January 3, 2017) in excess of the first 6% of such investment and financing costs during any six-month VCM reporting period from or after VCM 17 will not be recovered in GPC’s retail rates because they are deemed by the GPSC to be unreasonable or imprudent or for any other reason, or (ii) that such investment or associated financing costs in excess of the 6% threshold for any six-month VCM reporting period will be presumed to be unreasonable or imprudent or unrecoverable, in each case which decision or determination shall have become final and non-appealable; or (2) from or after the VCM 17 reporting period, GPC shall (i) not submit any portion of GPC’s share of the total Project investment or GPC’s associated financing costs in excess of the 6% threshold for any six-month VCM reporting period to the GPSC for approval by the conclusion of its routine VCM reporting process or (ii) publicly announce, with respect to any portion of GPC’s share of the total Project investment or GPC’s associated financing costs in excess of the 6% threshold for any six-month VCM reporting period, its intention not to submit such portion to the GPSC for approval for recovery in GPC’s rates (except, with respect to subclauses (2) (i) and (2)(ii), the $694,000,000 of its share of the total Project investment incurred during the six-month VCM reporting period covered by GPC’s Nineteenth Semi-Annual Construction Monitoring Report, submitted August 31, 2018, that GPC did not submit to the GPSC for approval for recovery in GPC’s rates); it being expressly understood and agreed that any investments or costs constituting the basis of a PAE under this subsection (2) shall not also support a PAE under subsection (1); provided, however, that amounts paid by GPC under Section 7.11 of the Ownership Participation Agreement to cover costs that would otherwise be borne by a non-GPC Participating Party shall not be taken into account for purposes of determining whether a PAE has occurred under this Section 2.1(a)(iii) and shall not count towards the 6% threshold for any six-month VCM reporting period;
1.2     Section 2.1(a)(iv) of the Agreement and Amendment is deleted and replaced with the following (the flush proviso following section 2.1(a)(iv) is unmodified):
(iv)
a cumulative increase in the estimated construction schedule for the Project, as reported to the Parties by SNC, that increases the construction schedule by an amount equal to or greater than one (1) year in excess of the longer of (x) the estimated construction schedule reported by GPC in VCM 17 (Commercial Operation dates of November 2021 for Unit 3 and November 2022 for Unit 4) and approved by the GPSC or (y) the longest of any estimated construction schedule approved by the Participating Parties owning at least an aggregate ninety percent (90%) Ownership Interest in the Additional Units in connection with a PAE (for example, if a PAE occurs for a cumulative increase in the estimated schedule for the Project, as reported to the Parties by SNC, of twelve months or more over the VCM 17 estimated schedule and the Participating Parties owning at least an aggregate ninety percent (90%) Ownership Interest in the Additional Units voted to continue or defer the Project, if the estimated schedule for the Project, as reported to the Parties by SNC, later increases on a cumulative basis by an additional twelve

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months or more, the later twelve-month or more increase shall constitute its own separate, additional PAE event).
For purposes of this Section 2.1(a)(iv), the phrase “as reported to the Parties by SNC,” shall mean, without duplication: (1) a written notice to the Parties executed by the Chief Executive Officer or Executive Vice President of SNC including such estimated construction schedule for the Project, or (2) a formal presentation by SNC or GPC for vote of the Parties of a proposed budget containing such estimated construction schedule for the Project for approval in accordance with the Ownership Participation Agreement, or (3) a filing by GPC with the GPSC including such estimated construction schedule for the Project; it being expressly understood and agreed that any estimated construction schedule for the Project can only constitute the basis for one PAE despite the multiple ways/times it may be reported to the Parties by SNC;
1.3     Section 2.12 of the Agreement and Amendment is modified as follows:
(a) Section 2.12(a) is amended to delete the third paragraph and replace it with the following: “ [Insert description of each PAE event to which the Ballot relates. For any PAE under 2.1(a)(iii), the description shall include the specific dollar amount of investment, financing costs or both that is the basis of the PAE. For any PAE under 2.1(a)(iv), the description shall include the new estimated Commercial Operation dates that are the basis of the PAE.]
(b) Section 2.12(b) is amended to delete the first sentence and replace it with the following: “Each Party shall have fifteen (15) business days from its receipt of the Ballot to return a properly completed and executed Ballot to each of the other Parties (the “ Ballot Deadline ”).”
(c) Section 2.12(d) is amended by adding the following to the end before the period: “; provided, however, in the event that Parties holding more than fifty percent (50%) of the Ownership Interest in the Additional Units vote to continue the Project, the Chief Executive Officer or Executive Vice President of GPC will direct the Chief Executive Officer or Executive Vice President of SNC to continue diligent performance of work for a period of thirty (30) days after expiration of the authorization period described in Section 2.12(c). During such thirty (30) day period, the Parties will negotiate in good faith regarding terms of the resumption of the Project. If at the conclusion of the extension period, the Parties holding an aggregate ninety percent (90%) or more of the Ownership Interest in the Additional Units do not agree to continue the Project, the Chief Executive Officer or Executive Vice President of GPC will direct the Chief Executive Officer or Executive Vice President of SNC to commence and have completed on behalf of the Parties the orderly termination of Project work, and the Parties who originally voted to continue the Project (“Voting Owners”) shall reimburse the Parties who originally did not vote to continue the Project (“Non-Voting Owners”) for such Non-Voting Owners’ portion of incremental Costs of Construction during such thirty (30) day period.”
1.4     Section 3.1 of the Agreement and Amendment is deleted and replaced with the following:

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Section 3.1     No Unilateral Deferral Rights . No Party shall have a unilateral right to defer the Project. Any provision of the Development Agreement or Ownership Participation Agreement that implies that GPC has a unilateral right to defer the Project shall be interpreted to give effect to the first sentence of this Section 3.1.
Section 2.0    Amendments to Ownership Participation Agreement.
2.1     Section 5.3(b) of the Ownership Participation Agreement is amended to replace the first sentence with the following: “GPC may in its sole discretion elect to cancel the Project at any time.”
2.2     Article V is amended by adding a new Section 5.9 as follows:
Section 5.9     Project Advisors . KPMG will be retained on behalf of the Participating Parties in accordance with the engagement letter executed with KPMG on July 24, 2018, to consult, advise and report to the Participating Parties on issues pertaining to (1) project management and controls, (2) organizational controls, (3) commercial management plans, and (4) interim project reports. KPMG will remain as project advisors until the earlier of: (1) KPMG is released by the Participating Parties owning at least an aggregate 67% Ownership Interest in the Additional Units or (2) the Commercial Operation of both Additional Units. If KPMG is no longer able or willing to fulfill such role they shall be replaced with an equivalent nationally recognized construction management group.
2.3     Section 7.4 of the Ownership Participation Agreement is amended as follows:
(a)     Section 7.4(a) is amended by adding the parenthetical “(except as provided in Section 7.11)” in the first sentence after the phrase “in proportion to their respective Ownership Interests in such Additional Units” and before the phrase “in accordance with the further provisions of this Section 7.4;”:
(b)     Section 7.4 is amended by adding the following new Section 7.4(h):
(h)    To the extent Cost of Construction on an Additional Unit is less than the VCM 19 Forecast for that Additional Unit and achieves the 29+ Month Schedule as to that Additional Unit, GPC shall be entitled to 60.7% of the savings on the Additional Unit and the other Participating Parties will share 39.3% of the savings on the Additional Unit on a pro rata basis according to their Ownership Interests.
2.4     Article VII of the Ownership Participation Agreement is amended by adding the following new Section 7.11 at the end:
Section 7.11     Alternative Contribution Percentages . Notwithstanding Sections 5.4 and 7.4 of this Agreement, but without limiting the application of such sections to allocation of the Cost of Construction to the extent not addressed by this Section 7.11, the provisions of this Section 7.11 shall apply for purposes of determining the Participating Parties’ payment responsibilities for the portion of costs addressed by this Section 7.11.
(a)    Consistent with Sections 5.4 and 7.4, each Participating Party will

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pay its share of Qualifying Construction Costs up to the VCM 19 Forecast plus $800 million according to their Ownership Interests.
(b)    In the event the estimate at completion is revised and exceeds the VCM 19 Forecast by more than $800 million, GPC will pay:
(i)    55.7% of actual Qualifying Construction Costs between the VCM 19 Forecast plus an additional $800 million and the VCM 19 Forecast plus an additional $1.6 billion; and the other Participating Parties will share 44.3% of such costs on a pro rata basis according to their Ownership Interests. For the avoidance of doubt GPC shall be obligated to pay up to $80 million of the other Participating Parties’ share of costs in the aggregate under this Section 7.11(b)(i).
(ii)    65.7% of the Qualifying Construction Costs between amounts greater than the VCM 19 Forecast plus an additional $1.6 billion and the VCM 19 Forecast plus an additional $2.1 billion, and the other Participating Parties will share 34.3% of such costs on a pro rata basis according to their Ownership Interests. For the avoidance of doubt GPC shall be obligated to pay up to $100 million of the other Participating Parties’ share of costs in the aggregate under this Section 7.11(b)(ii).
(c)     In the event the estimate at completion is revised and exceeds the VCM 19 Forecast plus $2.1 billion, each of the Participating Parties shall have a one-time option to be exercised or not at the time the budget forecast first shows the budget exceeding the VCM 19 Forecast plus $2.1 billion to tender a portion of its Ownership Interest to GPC in exchange for GPC's agreement to pay 100% of such Participating Party’s remaining share of Cost of Construction in excess of the VCM 19 Forecast plus $2.1 billion.
(i)    In order to make an effective tender of its interest, a Participating Party must provide GPC with evidence that each lender, off taker or other party with an interest in a Participating Party’s interest in the Additional Units has approved the conveyance of such interest in the Additional Units to GPC under this Section 7.11(c) and has agreed to release any liens relating to the interest to be conveyed to GPC.
(ii)    The Ownership Interest to be conveyed from the tendering Participating Party to GPC shall be calculated based on each Participating Party’s share of Cost of Construction paid at the Commercial Operation date of Unit 4 divided by the total Cost of Construction paid by all Participating Parties at Commercial Operation date of Unit 4. In order to reconcile Ownership Interests to total Cost of Construction paid by each Participating Party, such interests shall be conveyed by the tendering Participating Party free and clear of all encumbrances or clouds on title, within 180 days of the Commercial Operation date of Unit 4. For purposes of the calculation to be done to determine the Ownership Interest to be conveyed the actual Cost of Construction of the Additional Units as of the Commercial Operation Date

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of Unit 4 shall be used.
(iii) GPC shall have the option of canceling the Project in lieu of accepting an offer under this Section 7.11(c).
(iv)    If one or more Participating Parties exercise the option set forth in this Section 7.11(c) and GPC does not exercise its option of canceling the Project in lieu of such offer, then GPC shall accept such offer and each Participating Party’s Ownership Interest and right to output in the Additional Units will be adjusted in accordance with the percentage of the total Cost of Construction paid by that Participating Party, net of Toshiba guarantee payments, and each Participating Party shall be credited in the calculation in Section 7.11(c)(ii) for any Qualifying Construction Costs payments made by GPC on behalf of such Participating Party in accordance with Section 7.11(b) as if such payment was a Cost of Construction paid by that Participating Party, as of Commercial Operation date of Unit 4.
(v)    Any Participating Party that does not make a tender under Section 7.11(c) will share Cost of Construction in excess of VCM 19 Forecast plus $2.1 billion according to its Ownership Interest.
2.5     Appendix A of the Ownership Participation Agreement is amended as follows:
(a)     A new definition for “29+ Month Schedule” is added as follows:
“29+ Month Schedule” means a schedule achieving Commercial Operation occurring on or before November 30, 2021 for Unit 3 and November 30, 2022 for Unit 4.
(b)     A new definition for “Force Majeure Event” is added as follows:
“Force Majeure Event” means any event or circumstance to the extent that it: (a) prevents or materially delays or materially increases the costs of the performance of work in connection with the Project (whether by GPC, Southern Nuclear Operating Company, Inc., or any contractors or subcontractors) or the performance of any GPC or Southern Nuclear Operating Company, Inc. obligation in connection with the various Project ownership and agency agreements; (b) is beyond the reasonable control of and not the result of the fault or negligence of GPC or Southern Nuclear Operating Company, Inc.; and (c) could not have been prevented by GPC’s or Southern Nuclear Operating Company, Inc.’s exercise of reasonable diligence. To the extent that the preceding conditions are satisfied, Force Majeure Events include the following events or circumstances: (i) war, civil insurrection, riots, sabotage, acts of terrorism; (ii) acts of God, including flash floods, hurricanes, tornadoes, typhoons, lightning strikes, earthquakes and the like; (iii) epidemics, quarantines, embargoes, trade disputes, blockades; (iv) labor disputes, strikes, labor shortages; (v) governmental actions or inactions (or significant delays associated with issuance of such actions) that affect the licensing, completion, startup, operations, or financing of the Project; (vi) changes in laws or regulations governing the Project; (vii) significant market fluctuations; (viii)

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bankruptcy or abandonment by contractors or subcontractors; (ix) significant supply chain disruptions, including shortages of equipment and materials; (x) administrative proceedings or litigation regarding ITAAC or other regulatory challenges to commencement of operation of the Project.
(c)     A new definition for “Project” is added as follows:
“Project” means the construction, completion, testing, startup and pre-operational turnover of the Additional Units.
(d)     A new definition for “Qualifying Construction Costs” is added as follows:
“Qualifying Construction Costs” means all Cost of Construction payable under this Agreement, provided however that Qualifying Construction Costs do not include: (i) costs that are the result of a Force Majeure Event, (ii) legal fees and legal expenses incurred due to litigation with contractors or subcontractors that are not subsidiaries or affiliates of Southern Company, and (iii) costs caused by non-GPC Participating Party requests, except for the exercise of a right to vote granted under this Agreement, that increase Costs of Construction by $100,000 or more.
(e)     A new definition for “Unit 3” is added as follows:
“Unit 3” means the Additional Unit referred to in VCM 19 as “Unit 3.”
(f)     A new definition for “Unit 4” is added as follows:
“Unit 4” means the Additional Unit referred to in VCM 19 as “Unit 4.”
(g)     A new definition for “VCM 19” is added as follows:
“VCM 19” means GPC’s Nineteenth Semi-Annual Construction Monitoring Report, submitted August 31, 2018.
(h)     A new definition for “VCM 19 Forecast” is added as follows:
“VCM 19 Forecast” means the total project cost of which GPC’s share is $8.4 billion.
Section 3.0    Amendment to Development Agreement
3.1     Section 3.8 of the Development Agreement is reinserted and shall read as follows:
3.8     Cancellation . GPC may in its sole discretion elect to cancel the construction, completion, testing, startup and pre-operational turnover of the Additional Units at any time.
Section 4.0    Amendments to Operating Agreement
4.1     Article IV of the Operating Agreement is amended to add a Section 4.7 as follows:

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Section 4.7     Production Tax Credits .
(a)    Each non-GPC Participating Party shall have the option to sell to GPC, at the applicable purchase price specified below, up to 100% of such Participating Party’s production tax credits available under Section 45J of the Internal Revenue Code (“PTCs”) earned in any given calendar month in connection with the energy output from the Additional Units.
The applicable purchase price for a non-GPC Participating Party’s PTCs earned in any calendar month shall be determined as follows:
(i)    If the total Cost of Construction (as that term is defined in the Additional Units Ownership Agreement) for both Additional Units, as determined at Commercial Operation of the second Additional Unit to reach Commercial Operation, is:
(1) less than or equal to the VCM 19 Forecast (as that term is defined in the Additional Units Ownership Agreement), the purchase price will be the amount equal to the product of the aggregate value of the PTCs earned in such month to be sold to GPC as determined under Section 45J(a) of the Internal Revenue Code (the “Monthly PTC Value”) multiplied by 0.88.
(2) greater than the VCM 19 Forecast and less than the VCM 19 Forecast plus $300,000,000, the purchase price will be the amount equal to the Monthly PTC Value multiplied by 0.91.
(3) greater than or equal to VCM 19 Forecast plus $300,000,000 and less than VCM 19 Forecast plus $600,000,000, the purchase price will be the amount equal to the Monthly PTC Value multiplied by 0.95.
(4) greater than or equal to VCM 19 Forecast plus $600,000,000, purchase price will be the amount equal to the Monthly PTC Value multiplied by 0.98.
(ii)     For purposes of determining the applicable purchase price after Commercial Operation of the first Additional Unit to reach Commercial Operation but before Commercial Operation of the second Additional Unit to reach Commercial Operation, the purchase price for any PTCs earned on energy generated from the first Additional Unit in any calendar month will be calculated based on the actual Cost of Construction (as that term is defined in the Additional Units Ownership Agreement) for the first Additional Unit and the then-current budget for remaining Cost of Construction to reach Commercial Operation of the second Additional Unit (an “Interim Completion Estimate”). Following Commercial Operation of the second Additional Unit, GPC and each Participating Party selling PTCs pursuant to this Section 4.7(a)(ii) shall determine the actual total Cost of Construction (as that term is defined in the Additional Units Ownership

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Agreement) for both Additional Units and, if such total actual Cost of Construction differs from any Interim Completion Estimate, GPC shall pay to any selling Participating Party, or any selling Participating Party shall pay to GPC, as applicable, the difference between any purchase price for PTCs determined based on an Interim Completion Estimate under this Section 4.7(a)(ii) and the amount that the purchase price for such PTCs would have been had it been calculated based on the actual total Cost of Construction for both Additional Units.
(b)    All purchases by GPC of PTCs under this Section 4.7 shall occur during the calendar month following the calendar month in which such PTCs were earned.
(c)    As a condition to any obligation by GPC to purchase and make payment for a Participating Party’s PTCs under this Section 4.7 in any given month, the Participating Party shall provide GPC with (i) documentation evidencing a transfer by such Participating Party to GPC (effective upon payment) of all right, interest and entitlement to such PTCs free of all liens and other encumbrances, and (ii) an affidavit by an officer of the Participating Party warranting that the Participating Party has not transferred any right, interest or entitlement to such PTCs to any other Person and the transfer to GPC all of the Participating Party’s right, interest and entitlement as to such PTCs is free and clear of all liens and without breach of any agreements. The actual transfer of PTCs from the Participating Party to GPC shall be effected as provided in Section 45J of the Internal Revenue Code and all applicable regulations and guidance issued by the Internal Revenue Service or the Department of the Treasury with respect thereto as may be in effect from time to time.
(d)    With respect to any transfer of PTCs by a Participating Party to GPC contemplated by this Section 4.7, GPC and the Participating Party shall cooperate and consult with each other regarding, and take all actions required under Section 45J of the Internal Revenue Code and all applicable regulations and guidance issued by the Internal Revenue Service or the Department of the Treasury with respect thereto as may be in effect from time to time, for the Participating Party to timely elect the application of Section 45J(e) of the Internal Revenue Code with respect to such PTCs so that GPC shall be treated as the taxpayer with respect to such PTCs in accordance with Section 45J(e) of the Internal Revenue Code.
(e)    For purposes of this Section 4.7, each non-GPC Participating Party represents and warrants that it is a “qualified public entity” under Section 45J(e)(2)(A) of the Internal Revenue Code, and GPC represents and warrants that it is an “eligible project partner” under Section 45J(e)(2)(B) of the Internal Revenue Code.
(f)    GPC’s obligation under this Section 4.7 will only apply to MEAG Power SPVJ, LLC’s PTCs remaining following any GPC purchases of MEAG Power SPVJ, LLC’s PTCs under a separate agreement between GPC and MEAG.

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SECTION 5.0    Miscellaneous.
Section 5.1     Defined Terms.     Capitalized terms used in this Global Amendment and not defined in this Global Amendment have the meanings assigned in the respective Additional Units Agreements.
Section 5.2     Counterparts . This Global Amendment may be executed simultaneously in two or more counterparts, each of which shall be deemed an original but all of which together shall constitute one and the same instrument. Further, the signatures of the duly authorized representatives of each Party hereto need not be contemporaneous and shall be deemed effective if exchanged by electronic transfer between the Parties hereto or their respective designees, including transmittal by facsimile or electronic mail.
Section 5.3     Governing Law . The validity, interpretation, and performance of this Global Amendment and each of its provisions shall be governed by the internal laws of the State of Georgia.
Section 5.4     Severability . If any provision of this Global Amendment is declared by any regulator or court of competent jurisdiction to be invalid or unenforceable, the balance of this Global Amendment shall remain in effect, and this Global Amendment shall be interpreted so as to give full effect to its effective terms and still be valid and enforceable.
Section 5.5     Headings . Headings appearing herein are used solely for convenience and are not intended to affect the interpretation of any provision of this Global Amendment.
Section 5.6     Beneficiaries . This Global Amendment is entered into for the sole benefit of the Parties, and except as may be specifically provided herein, no other person shall be a direct or indirect beneficiary of, or shall have any direct or indirect cause of action or claim in connection with, this Global Amendment.
Section 5.7     Ratification . As amended by this Global Amendment, the Agreement and Amendment, the Ownership Participation Agreement and the Operating Agreement remain in full force and effect.
[Remainder of page left blank intentionally.]

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IN WITNESS WHEREOF, the Parties have duly executed this Global Amendment as of the date first above written.
Signed, sealed and delivered in the presence
of:
 
GEORGIA POWER COMPANY
 
 
 
 
 
 
/s/Melanie Burks
 
By:  /s/Chris Cummiskey
Witness
 
Name:  Chris Cummiskey
 
 
Title:  EVP, External Affairs & Nuclear Development
/s/Cheryl K. Smiley
 
 
Notary Public
 
 
My Commission expires:  February 27, 2020
 
Attest:  /s/Meredith M. Lackey
 
 
Its:  SVP, General Counsel and Corporate Secretary
 
 
(CORPORATE SEAL)
 
 
 
 
 
 
Signed, sealed and delivered in the presence
of:
 
OGLETHORPE POWER CORPORATION (AN ELECTRIC MEMBERSHIP CORPORATION)
 
 
 
 
 
 
/s/Elizabeth B. Higgins
 
By:  /s/Michael L. Smith
Witness
 
Name:  Michael L. Smith
 
 
Title:  President and CEO
 /s/Jean L. Wheeler
 
 
Notary Public
 
 
My Commission expires:  May 7, 2020
 
Attest:  /s/Kimberly D. Adams
 
 
Its: Secretary
 
 
(CORPORATE SEAL)
 
 
 
 
 
 
Signed, sealed and delivered in the presence
of:
 
MUNICIPAL ELECTRIC AUTHORITY
OF GEORGIA
 
 
 
 
 
 
/s/Deborah Diaz
 
By:  /s/James E. Fuller
Witness
 
Name:  James E. Fuller
 
 
Title:  President & Chief Executive Officer
/s/Cindy R. Carter
 
 
Notary Public
 
 
My Commission expires:  January 26, 2021
 
Attest: /s/Peter M. Degnan
 
 
Its:  Sr. Vice President & General Counsel
 
 
(CORPORATE SEAL)

[Global Amendment signature page 1]

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Signed, sealed and delivered in the presence
of:
 
MEAG POWER SPVJ, LLC
 
 
 
 
 
By: MUNICIPAL ELECTRIC AUTHORITY
       OF GEORGIA, its sole member
 
 
 
/s/Deborah Diaz
 
By:  /s/James E. Fuller
Witness
 
Name:  James E. Fuller
 
 
Title:  President & Chief Executive Officer
/s/Cindy R. Carter
 
 
Notary Public
 
 
My Commission expires:  January 26, 2021
 
Attest: /s/Peter M. Degnan
 
 
Its:  Sr. Vice President & General Counsel
 
 
(CORPORATE SEAL)
 
 
 
Signed, sealed and delivered in the presence
of:
 
MEAG POWER SPVM, LLC
 
 
 
 
 
By: MUNICIPAL ELECTRIC AUTHORITY
       OF GEORGIA, its sole member
 
 
 
/s/Deborah Diaz
 
By:  /s/James E. Fuller
Witness
 
Name:  James E. Fuller
 
 
Title:  President & Chief Executive Officer
/s/Cindy R. Carter
 
 
Notary Public
 
 
My Commission expires:  January 26, 2021
 
Attest: /s/Peter M. Degnan
 
 
Its:  Sr. Vice President & General Counsel
 
 
(CORPORATE SEAL)
 
 
 
Signed, sealed and delivered in the presence
of:
 
MEAG POWER SPVP, LLC
 
 
 
 
 
By: MUNICIPAL ELECTRIC AUTHORITY
       OF GEORGIA, its sole member
 
 
 
/s/Deborah Diaz
 
By:  /s/James E. Fuller
Witness
 
Name:  James E. Fuller
 
 
Title:  President & Chief Executive Officer
/s/Cindy R. Carter
 
 
Notary Public
 
 
My Commission expires:  January 26, 2021
 
Attest: /s/Peter M. Degnan
 
 
Its:  Sr. Vice President & General Counsel
 
 
(CORPORATE SEAL)

[Global Amendment signature page 2]

CONFIDENTIAL


Signed, sealed and delivered in the presence
of:
 
CITY OF DALTON, GEORGIA
BY: BOARD OF WATER, LIGHT AND
SINKING FUND COMMISSIONERS
D/B/A DALTON UTILITIES
 
 
 
/s/Mark Buckner
 
By:  /s/Tom Bundros
Witness
 
Name:  Tom Bundros
 
 
Title:  CEO
/s/Pam Witherow
 
 
Notary Public
 
 
My Commission expires:  May 13, 2019
 
Attest:  /s/John Thomas
 
 
Its:  Chief Energy Officer
 
 
(CORPORATE SEAL)
 
 
 


[Global Amendment signature page 3]

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APPENDIX A
ADDITIONAL UNITS AGREEMENTS

1.      Plant Vogtle Owners Agreement Authorizing Development, Construction, Licensing and Operation of Additional Generating Units, among GPC, OPC, MEAG and Dalton, dated as of May 13, 2005
a.      MEAG Side Letter, dated as of May 13, 2005
b.      Amendment No. 1, dated as of April 21, 2006
c.      Agreement as to Typographical Error, dated as of April 19, 2007
d.      Amendment No. 2, dated as of April 8, 2008
e.      First Addendum to Development Agreement, dated as of April 8, 2008
f.      Agreement and Amendment No. 3, among the original parties and the MEAG SPVs, dated as of February 20, 2014
2.      Additional Units Ownership Participation Agreement, among GPC, OPC, MEAG and Dalton, dated as of April 21, 2006, recorded in Burke County, Georgia
a.      Letter regarding Clarification of Section 4.2(f), dated as of April 5, 2008
b.      Amendment No. 1, dated as of April 8, 2008
c.      Side Letter regarding delivery of Construction Budget, dated as of June 18, 2009
d.      Agreement and Amendment No. 2, among the original parties and the MEAG SPVs, dated as of February 20, 2014
e.      Owners Consent to Assignment and Direct Agreement and Amendment, by and among the parties and PNC Bank, National Association, doing business as Midland Loan Services, a division of PNC Bank, National Association, dated as of February 20, 2014
3.      Side Letter regarding Designation of SNC as Agent for Development Agreement Activities, dated as of July 28, 2006

4.      Side Letter regarding Designation of SNC as Agent for Procurement, Contract Management, Construction and Pre-Operation Activities, dated as of July 30, 2008
a.      Amendment to Side Letter, dated January 24, 2018

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5.      Amended and Restated Operating Agreement, among GPC, OPC, MEAG and Dalton, dated as of April 21, 2006, recorded in Burke County, Georgia
a.      Amendment No. 1, dated as of April 8, 2008
b.      Agreement and Amendment No. 2, dated February 20, 2014
6.      Second Amended and Restated Nuclear Managing Board Agreement, among GPC, OPC, MEAG and Dalton, dated as of April 21, 2006
a.      Amendment No. 1, dated as of April 8, 2008
b.      Agreement and Amendment No. 2, dated as of February 20, 2014
7.      Amended and Restated Nuclear Operating Agreement, between GPC and Southern Nuclear Operating Company, Inc., dated as of April 21, 2006

8.      Declaration of Covenants and Cross-Easements for Vogtle Additional Units, made by GPC, OPC, MEAG and Dalton, dated as of April 21, 2006, recorded in Burke County, Georgia
a.      Amendment, dated December 18, 2013
9.      Omnibus Amendment Regarding Plant Vogtle Additional Units Description among GPC, OPC, MEAG and Dalton, dated December 1, 2013, as filed in Burke County

10.      Joint Defense Agreement – Licensing of Additional Vogtle Units, dated as of January 11, 2007, by and among SNC, Balch & Bingham, LLP, GPC, Troutman Sanders LLP, OPC, Sutherland Asbill & Brennan LLP, MEAG, Alston & Bird, LLP, Dalton and Minor, Bell & Neal

11.      Letter Agreement regarding Agency Authority under Plant Agreements, dated September 3, 2009

12.      Agreement Regarding Additional Participating Party Rights and Amendment No. 3 to Plant Alvin W. Vogtle Additional Units Ownership Participation Agreement and Amendment No. 4 to Plant Vogtle Owners Agreement Authorizing Development, Construction, Licensing and Operation of Additional Generating Units, dated November 2, 2017, among GPC, OPC, MEAG, the MEAG SPVs and Dalton (as amended, the “ Agreement and Amendment ”)

a.      First Amendment, dated August 31, 2018

Global Amendment
Page A-2

Exhibit 21(a)

Subsidiaries of the Registrant (1)  

Name of Company


Jurisdiction of Organization
 
 
 
The Southern Company
 
Delaware
Alabama Power Company
 
Alabama
Alabama Power Capital Trust V
 
Delaware
Alabama Property Company
 
Alabama
Southern Electric Generating Company
 
Alabama
Georgia Power Company
 
Georgia
Piedmont-Forrest Corporation
 
Georgia
Southern Electric Generating Company
 
Alabama
Mississippi Power Company
 
Mississippi
Southern Power Company
 
Delaware
Mankato Energy Center, LLC
 
Delaware
Mankato Energy Center II, LLC
 
Delaware
Nacogdoches Power, LLC
 
Delaware
RE Roserock Holdings LLC (2)
 
Delaware
RE Roserock LLC
 
Delaware
Reading Wind Energy, LLC
 
Delaware
Wildhorse Wind Energy, LLC
 
Delaware
Southern Renewable Energy, Inc.
 
Delaware
SP Solar GP, Inc.
 
Delaware
SP Solar Holdings I, LP (3)
 
Delaware
BNB Lamesa Solar LLC
 
Delaware
East Pecos Solar, LLC
 
Delaware
SP Butler Solar, LLC
 
Delaware
SP Butler Solar Farm, LLC
 
Delaware
SP Decatur County Solar, LLC
 
Delaware
SP Decatur Parkway Solar, LLC
 
Delaware
SP Pawpaw Solar, LLC
 
Delaware
SP Sandhills Solar, LLC
 
Delaware
SP Solar Farms, LLC
 
Delaware
Adobe Solar, LLC
 
Delaware
Apex Nevada Solar, LLC
 
Delaware
Calipatria, LLC
 
Delaware
Campo Verde Solar, LLC
 
Delaware
Granville Solar, LLC
 
Delaware
Macho Springs Solar, LLC
 
Delaware
Macho Springs Solar 2, LLC
 
Delaware
Morelos Solar, LLC
 
Delaware
Rutherford Farm, LLC
 
Delaware



SP Cimarron I, LLC
 
Delaware
SP Cimarron Capital, LLC
 
Delaware
Spectrum Nevada Solar, LLC
 
Delaware
Southern Renewable Partnerships, LLC
 
Delaware
BSP Holding Company, LLC (4)
 
Delaware
Boulder Solar Power Parent, LLC
 
Delaware
Boulder Solar Power, LLC
 
Delaware
Desert Stateline Holdings, LLC (5)
 
Delaware
Desert Stateline, LLC
 
Delaware
Lost Hills Blackwell Holdings, LLC (4)
 
Delaware
Lost Hills Solar Holdco, LLC
 
Delaware
Lost Hills Solar, LLC
 
Delaware
Blackwell Solar Holdings, LLC
 
Delaware
Blackwell Solar, LLC
 
Delaware
NS Solar Holdings, LLC (4)
 
Delaware
North Star Solar, LLC
 
Delaware
Parrey Holding Company, LLC (4)
 
Delaware
Parrey Parent, LLC
 
Delaware
Parrey, LLC
 
Delaware
RE Silverlake Holdings LLC (4)
 
Delaware
RE Garland Holdings LLC
 
Delaware
RE Garland LLC
 
Delaware
RE Garland A LLC
 
Delaware
RE Tranquillity Holdings LLC (4)
 
Delaware
RE Tranquillity LLC
 
Delaware
RE Tranquillity BAAH LLC
 
Delaware
SG2 Holdings, LLC (4)
 
Delaware
SG2 Imperial Valley LLC
 
Delaware
SP Wind Holdings II, LLC (6)
 
Delaware
Bethel Wind Farm Class B Holdings LLC
 
Delaware
Bethel Wind Farm Holdings LLC
 
Delaware
Bethel Wind Farm LLC
 
Delaware
Grant Plains Wind, LLC
 
Delaware
Grant Wind, LLC
 
Delaware
Grant County Interconnect, LLC (7)
 
Delaware
Kay Wind, LLC
 
Delaware
Passadumkeag Windpark, LLC
 
Delaware
Salt Fork Wind, LLC
 
Delaware
Tyler Bluff Wind Project, LLC
 
Delaware
WWH, LLC (8)
 
Delaware
Wake Wind Class B Holdings LLC
 
Delaware
Wake Wind Holdings LLC
 
Delaware
Wake Wind Energy LLC
 
Delaware
SP TEP Class B Holdings I, Inc.
 
Delaware
SP Gaskell West 1 Class B Holdings, LLC
 
Delaware
SP Gaskell West 1 Holdings, LLC (9)
 
Delaware



RE Gaskell West 1 LLC
 
Delaware
SP Wind Development Holdings, LLC
 
Delaware
SP TEP Formations, Inc.
 
Delaware
SP Cactus Flats Class B Holdings, LLC
 
Delaware
Cactus Flats Holdings, LLC (10)
 
Delaware
SP Cactus Flats Wind Energy, LLC
 
Delaware
SP Wind Holdings, LLC
 
Delaware
SPR Development Holdings, LLC (11)
 
Delaware
Southern Company Gas
 
Georgia
Southern Company Gas Capital Corporation
 
Nevada
Southern Company Gas Investments Inc.
 
Georgia
Sequent LLC
 
Georgia
Atlanta Gas Light Company
 
Georgia
Georgia Natural Gas Company
 
Georgia
SouthStar Energy Services LLC
 
Delaware
Ottawa Acquisition LLC
 
Illinois
Northern Illinois Gas Company (12)
 
Illinois
Southern Company Gas Investments, Inc.
 
Georgia
Southern Company Gas Pipeline Holdings LLC
 
Georgia
Evergreen Enterprise Holdings LLC
 
Georgia


(1)
This information is as of January 1, 2019. In addition, this list omits certain subsidiaries pursuant to paragraph (b)(21)(ii) of Regulation S-K, Item 601.
(2)
Southern Power Company owns 100% of the Class A membership interests and is entitled to 51% of all cash distributions.
(3)
Southern Renewable Energy, Inc. and SP Solar GP, Inc. own 66% and 1%, respectively.
(4)
Southern Renewable Partnerships, LLC owns 100% of the Class A membership interests and is entitled to 51% of all cash distributions.
(5)
Southern Renewable Partnerships, LLC owns 100% of the Class A membership interests and is entitled to 66% of all cash distributions.
(6)
Southern Renewable Energy, Inc owns 100% of the Class B membership interests in the tax equity partnership.
(7)
Grant Wind, LLC and Grant Plains Wind, LLC own 50.4% and 49.6%, respectively.
(8)
SP Wind Holdings II, LLC owns 90.1%.
(9)
SP Gaskell West 1 Class B Holdings, LLC owns 100% of the Class B membership interests in the tax equity partnership.
(10)
SP Cactus Flats Class B Holdings, LLC and SP TEP Class B Holdings I, Inc. own 95% and 5%, respectively, of the Class B membership interests in the tax equity partnership.
(11)
SP Wind Holdings, LLC owns 51%.
(12)
Doing business as Nicor Gas Company.



Exhibit 23(a)1


CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement Nos. 2-78617, 33-54415, 33-58371, 33-60427, 333-44127, 333-118061, 333-166709, 333-174707, 333-204618 , 333-208173 , and 333-212783 on Form S-8 and Registration Statement Nos. 333-2 23128 and 333- 223242 on Form S-3 of our reports dated February 19, 2019, relating to the consolidated financial statements and consolidated financial statement schedule of The Southern Company and Subsidiary Companies, and the effectiveness of The Southern Company and Subsidiary Companies' internal control over financial reporting, appearing in this Annual Report on Form 10-K of The Southern Company for the year ended December 31, 2018.



/s/Deloitte & Touche LLP

Atlanta, Georgia
February 19, 2019




Exhibit 23(b)1



CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-216229 on Form S-3 of our reports dated February 19, 2019, relating to the financial statements and financial statement schedule of Alabama Power Company, appearing in this Annual Report on Form 10-K of Alabama Power Company for the year ended December 31, 2018.


/s/Deloitte & Touche LLP

Birmingham, Alabama
February 19, 2019



Exhibit 23(c)1


CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-209779 on Form S-3 of our reports dated February 19, 2019, relating to the financial statements and financial statement schedule of Georgia Power Company, appearing in this Annual Report on Form 10-K of Georgia Power Company for the year ended December 31, 2018.

/s/Deloitte & Touche LLP

Atlanta, Georgia
February 19, 2019




Exhibit 23(d)1


CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-219651 on Form S-3 of our reports dated February 19, 2019, relating to the financial statements and financial statement schedule of Mississippi Power Company, appearing in this Annual Report on Form 10-K of Mississippi Power Company for the year ended December 31, 2018.


/s/Deloitte & Touche LLP

Atlanta, Georgia
February 19, 2019



Exhibit 23(e)1


CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-213264 on Form S-3 of our reports dated February 19, 2019, relating to the consolidated financial statements and financial statement schedule of Southern Power Company and Subsidiary Companies, appearing in this Annual Report on Form 10-K of Southern Power Company for the year ended December 31, 2018.

/s/Deloitte & Touche LLP

Atlanta, Georgia
February 19, 2019




Exhibit 23(f)1


CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-212328 on Form S-3 and Registration Statement Nos. 333-26963 and 333-154965 on Form S-8 of our reports dated February 19, 2019, relating to the consolidated financial statements and financial statement schedule of Southern Company Gas and Subsidiary Companies, appearing in this Annual Report on Form 10-K of Southern Company Gas for the year ended December 31, 2018.

/s/Deloitte & Touche LLP

Atlanta, Georgia
February 19, 2019





Exhibit 23(f)2


CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM


We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (No. 333-212328) and on Form S-8 (Nos. 333-26963 and 333-154965) of Southern Company Gas of our report dated February 14, 2018 relating to the financial statements of Southern Natural Gas Company, L.L.C., which appears in this Form 10-K of Southern Company Gas.

/s/PricewaterhouseCoopers LLP
Houston, Texas
February 19, 2019





Exhibit 23(f)3




Consent of Independent Registered Public Accounting Firm

We hereby consent to the incorporation by reference in the Registration Statements on Form S-­3 (No. 333-212328) and Form S-8 (Nos. 333-26963 and 333-154965) of Southern Company Gas of our report dated February 15, 2019, relating to the consolidated financial statements of Southern Natural Gas Company, L.L.C., which appears in this Form 10-K of Southern Company Gas.


/s/BDO USA, LLP

Houston, Texas
February 15, 2019




Exhibit 24(a)(1)


December 10, 2018


Myra C. Bierria and Melissa K. Caen


Ms. Bierria and Ms. Caen:

The Southern Company (the “Company”) proposes to file or join in the filing of reports under the Securities Exchange Act of 1934, as amended, with the Securities and Exchange Commission with respect to the following: (1) the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 and (2) the Company’s Quarterly Reports on Form 10-Q during 2019.
The Company and the undersigned directors and officers of the Company, individually as a director and/or as an officer of the Company, hereby make, constitute and appoint each of you our true and lawful Attorney for each of us and in each of our names, places and steads to sign and cause to be filed with the Securities and Exchange Commission in connection with the foregoing said Annual Report on Form 10-K, said Quarterly Reports on Form 10-Q and any necessary or appropriate amendment or amendments to any such reports, to be accompanied in each case by any necessary or appropriate exhibits or schedules thereto.
 
Yours very truly,


 
THE SOUTHERN COMPANY


 
By
/s/Thomas A. Fanning
 
 
Thomas A. Fanning
Chairman, President and
Chief Executive Officer




- 2 -


/s/Juanita Powell Baranco
 
/s/Dale E. Klein
Juanita Powell Baranco



 
Dale E. Klein
/s/Jon A. Boscia
 
/s/Ernest J. Moniz
Jon A. Boscia



 
Ernest J. Moniz
/s/Henry A. Clark III
 
/s/William G. Smith, Jr.
Henry A. Clark III



 
William G. Smith, Jr.
/s/Thomas A. Fanning
 
/s/Steven R. Specker
Thomas A. Fanning



 
Steven R. Specker
/s/David J. Grain
 
/s/Larry D. Thompson
David J. Grain



 
Larry D. Thompson
/s/Veronica M. Hagen
 
/s/E. Jenner Wood III
Veronica M. Hagen



 
E. Jenner Wood III
/s/Donald M. James
 
/s/Andrew W. Evans
Donald M. James



 
Andrew W. Evans
/s/John D. Johns
 
/s/Ann P. Daiss
John D. Johns
 
Ann P. Daiss




- 3 -



Extract from minutes of meeting of the board of directors of The Southern Company.

- - - - - - - - - -

RESOLVED: That for the purpose of signing the reports under the Securities Exchange Act of 1934 to be filed with the Securities and Exchange Commission with respect to the filing of the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 and its 2019 Quarterly Reports on Form 10-Q, and any necessary or appropriate amendment or amendments to any such reports, the Company, the members of its Board of Directors and its officers be and hereby are authorized to give their several powers of attorney to Myra C. Bierria and Melissa K. Caen.

- - - - - - - - - -

The undersigned officer of The Southern Company does hereby certify that the foregoing is a true and correct copy of a resolution duly and regularly adopted at a meeting of the board of directors of The Southern Company, duly held on December 10, 2018, at which a quorum was in attendance and voting throughout, and that said resolution has not since been rescinded but is still in full force and effect.


Dated: February 19, 2019
THE SOUTHERN COMPANY


 
By
/s/Melissa K. Caen
 
 
Melissa K. Caen
Assistant Secretary




Exhibit 24(a)(2)


January 2, 2019


Myra C. Bierria and Melissa K. Caen


Ms. Bierria and Ms. Caen:

The Southern Company (the “Company”) proposes to file or join in the filing of reports under the Securities Exchange Act of 1934, as amended, with the Securities and Exchange Commission with respect to the following: (1) the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 and (2) the Company’s Quarterly Reports on Form 10-Q during 2019.
The Company and the undersigned directors and officers of the Company, individually as a director and/or as an officer of the Company, hereby make, constitute and appoint each of you our true and lawful Attorney for each of us and in each of our names, places and steads to sign and cause to be filed with the Securities and Exchange Commission in connection with the foregoing said Annual Report on Form 10-K, said Quarterly Reports on Form 10-Q and any necessary or appropriate amendment or amendments to any such reports, to be accompanied in each case by any necessary or appropriate exhibits or schedules thereto.
 
Yours very truly,


 
THE SOUTHERN COMPANY


 
By
/s/Thomas A. Fanning
 
 
Thomas A. Fanning
Chairman, President and
Chief Executive Officer




- 2 -







/s/Anthony F. Earley, Jr.
 
/s/Janaki Akella
Anthony F. Earley, Jr.



 
Janaki Akella




- 3 -



Extract from minutes of meeting of the board of directors of The Southern Company.

- - - - - - - - - -

RESOLVED: That for the purpose of signing the reports under the Securities Exchange Act of 1934 to be filed with the Securities and Exchange Commission with respect to the filing of the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 and its 2019 Quarterly Reports on Form 10-Q, and any necessary or appropriate amendment or amendments to any such reports, the Company, the members of its Board of Directors and its officers be and hereby are authorized to give their several powers of attorney to Myra C. Bierria and Melissa K. Caen.

- - - - - - - - - -

The undersigned officer of The Southern Company does hereby certify that the foregoing is a true and correct copy of a resolution duly and regularly adopted at a meeting of the board of directors of The Southern Company, duly held on December 10, 2018, at which a quorum was in attendance and voting throughout, and that said resolution has not since been rescinded but is still in full force and effect.


Dated: February 19, 2019
THE SOUTHERN COMPANY


 
By
/s/Melissa K. Caen
 
 
Melissa K. Caen
Assistant Secretary




Exhibit 24(b)
APCLOGOHORZA08.JPG
Mark A. Crosswhite
Chairman, President and
Chief Executive Officer
600 North 18th Street
Post Office Box 2641
Birmingham, Alabama 35291-0001

Tel 205.257.1000
Fax 205.257.5100

January 25, 2019



Andrew W. Evans    Melissa K. Caen
30 Ivan Allen Jr. Blvd., N.W.    30 Ivan Allen Jr. Blvd., N.W.
Atlanta, Georgia 30308    Atlanta, Georgia 30308

Dear Mr. Evans and Ms. Caen:

Alabama Power Company (the “Company”) proposes to file or join in the filing of reports under the Securities Exchange Act of 1934, as amended, with the Securities and Exchange Commission with respect to the following: (1) the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 and (2) the Company’s Quarterly Reports on Form 10-Q during 2019.

The Company and the undersigned directors and officers of the Company, individually as a director and/or as an officer of the Company, hereby make, constitute and appoint each of you our true and lawful Attorney for each of us and in each of our names, places and steads to sign and cause to be filed with the Securities and Exchange Commission in connection with the foregoing said Annual Report on Form 10-K, said Quarterly Reports on Form 10-Q and any necessary or appropriate amendment or amendments to any such reports, to be accompanied in each case by any necessary or appropriate exhibits or schedules thereto.



 
Yours very truly,

 
ALABAMA POWER COMPANY



 
By
/s/Mark A. Crosswhite
 
 
Mark A. Crosswhite
Chairman, President and Chief Executive
Officer








- 2 -


/s/Whit Armstrong
 
/s/Catherine J. Randall
Whit Armstrong




 
Catherine J. Randall




/s/Angus R. Cooper, III
 
/s/C. Dowd Ritter
Angus R. Cooper, III




 
C. Dowd Ritter




/s/Mark A. Crosswhite
 
/s/R. Mitchell Shackleford III
Mark A. Crosswhite




 
R. Mitchell Shackleford III




/s/O. B. Grayson Hall, Jr.
 
/s/Phillip M. Webb
O. B. Grayson Hall, Jr.




 
Phillip M. Webb




/s/Anthony A. Joseph
 
/s/Philip C. Raymond
Anthony A. Joseph




 
Philip C. Raymond




/s/James K. Lowder
 
/s/Anita Allcorn-Walker
James K. Lowder




 
Anita Allcorn-Walker




/s/Robert D. Powers
 
 
Robert D. Powers

 
 





- 3 -




Extract from minutes of meeting of the board of directors of Alabama Power Company.

- - - - - - - - - -

RESOLVED: That for the purpose of signing the reports under the Securities Exchange Act of 1934 to be filed with the Securities and Exchange Commission with respect to the filing of this Company’s Annual Report on Form 10-K for the year ended December 31, 2018 and its 2019 Quarterly Reports on Form 10-Q, and any necessary or appropriate amendment or amendments to any such reports, this Company, the members of its board of directors and its officers are authorized to give their several powers of attorney to Andrew W. Evans and Melissa K. Caen.

- - - - - - - - - -

The undersigned officer of Alabama Power Company does hereby certify that the foregoing is a true and correct copy of a resolution duly and regularly adopted at a meeting of the board of directors of Alabama Power Company, duly held on January 25, 2019, at which a quorum was in attendance and voting throughout, and that said resolution has not since been rescinded but is still in full force and effect.




Dated: February 19, 2019
ALABAMA POWER COMPANY



 
By
/s/Melissa K. Caen
 
 
Melissa K. Caen
Assistant Secretary





Exhibit 24(c)
October 16, 2018


Xia Liu, David P. Poroch, Andrew W. Evans and Melissa K. Caen


Ladies and Gentlemen:

Georgia Power Company (the “Company”) proposes to file or join in the filing of reports under the Securities Exchange Act of 1934, as amended, with the Securities and Exchange Commission with respect to the following: (1) the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 and (2) the Company’s Quarterly Reports on Form 10-Q during 2019.
The Company and the undersigned directors and officers of the Company, individually as a director and/or as an officer of the Company, hereby make, constitute and appoint each of you our true and lawful Attorney for each of us and in each of our names, places and steads to sign and cause to be filed with the Securities and Exchange Commission in connection with the foregoing said Annual Report on Form 10-K, said Quarterly Reports on Form 10-Q and any necessary or appropriate amendment or amendments to any such reports, to be accompanied in each case by any necessary or appropriate exhibits or schedules thereto.

 
Yours very truly,


 
GEORGIA POWER COMPANY


 
By
/s/W. Paul Bowers
 
 
W. Paul Bowers
Chairman, President and Chief Executive Officer



- 2 -


/s/W. Paul Bowers
 
/s/Jimmy C. Tallent
W. Paul Bowers



 
Jimmy C. Tallent



/s/Mark L. Burns
 
/s/Charles K. Tarbutton
Mark L. Burns



 
Charles K. Tarbutton



/s/Shantella E. Cooper
 
/s/Beverly Daniel Tatum
Shantella E. Cooper


 
Beverly Daniel Tatum



/s/Lawrence L. Gellerstedt, III
 
/s/Clyde C. Tuggle
Lawrence L. Gellerstedt, III


 
Clyde C. Tuggle



/s/Douglas J. Hertz
 
/s/Xia Liu
Douglas J. Hertz



 
Xia Liu



/s/Kessel D. Stelling, Jr.
 
/s/David P. Poroch
Kessel D. Stelling, Jr.



 
David P. Poroch







- 3 -


Extract from unanimous written consent of the board of directors of Georgia Power Company.

- - - - - - - - -

RESOLVED: That for the purpose of signing the reports under the Securities Exchange Act of 1934 to be filed with the Securities and Exchange Commission with respect to the filing of this Company’s Annual Report on Form 10-K for the year ended December 31, 2018 and its 2019 Quarterly Reports on Form 10-Q, and any necessary or appropriate amendment or amendments to any such reports, the Company, the members of its board of directors and its officers are authorized to give their several powers of attorney to Xia Liu, David P. Poroch, Andrew W. Evans and Melissa K. Caen.

- - - - - - - - -


The undersigned officer of Georgia Power Company does hereby certify that the foregoing is a true and correct copy of a resolution duly and regularly adopted at a meeting of the board of directors of Georgia Power Company, duly held on October 16, 2018, at which a quorum was in attendance and voting throughout, and that said resolution has not since been rescinded but is still in full force and effect.


Dated: February 19, 2019
GEORGIA POWER COMPANY



 
By
/s/Melissa K. Caen
 
 
Melissa K. Caen
Assistant Secretary





Exhibit 24(d)
October 23, 2018


Mr. Andrew W. Evans
The Southern Company
30 Ivan Allen Jr. Blvd., NW
Atlanta, GA 30308
Ms. Melissa K. Caen
Southern Company Services, Inc.
30 Ivan Allen Jr. Blvd., NW
Atlanta, GA 30308


Mr. Evans and Ms. Caen:


Mississippi Power Company (the “Company”) proposes to file or join in the filing of reports under the Securities Exchange Act of 1934, as amended, with the Securities and Exchange Commission with respect to the following: (1) the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 and (2) the Company’s Quarterly Reports on Form 10-Q during 2019.

The Company and the undersigned directors and officers of the Company, individually as a director and/or as an officer of the Company, hereby make, constitute and appoint each of you our true and lawful Attorney for each of us and in each of our names, places and steads to sign and cause to be filed with the Securities and Exchange Commission in connection with the foregoing said Annual Report on Form 10-K, said Quarterly Reports on Form 10-Q and any necessary or appropriate amendment or amendments to any such reports, to be accompanied in each case by any necessary or appropriate exhibits or schedules thereto.


Yours very truly,

MISSISSIPPI POWER COMPANY



 
By
/s/Anthony L. Wilson
 
 
Anthony L. Wilson
Chairman, President and Chief
Executive Officer
 






- 2 -




/s/Carl J. Chaney
 
/s/Anthony L. Wilson
Carl J. Chaney




 
Anthony L. Wilson



/s/L. Royce Cumbest
 
/s/Camille Scales Young
L. Royce Cumbest




 
Camille Scales Young



/s/Thomas Duff
 
/s/Moses H. Feagin
Thomas Duff




 
Moses H. Feagin




/s/Mark E. Keenum
 
/s/Jeffrey A. Stone
Mark E. Keenum




 
Jeffrey A. Stone




/s/Christine L. Pickering
 
/s/Cynthia F. Shaw
Christine L. Pickering




 
Cynthia F. Shaw




/s/M. L. Waters
 
 
M. L. Waters
 
 






- 3 -




Extract from minutes of meeting of the board of directors of Mississippi Power Company.

- - - - - - - - - -

RESOLVED, That for the purpose of signing the reports under the Securities Exchange Act of 1934, as amended, to be filed with the Securities and Exchange Commission with respect to the filing of the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 and its 2019 Quarterly Reports on Form 10-Q, and any necessary or appropriate amendment or amendments to any such reports, the Company, the members of its board of directors and its officers are authorized to give their several powers of attorney to Andrew W. Evans and Melissa K. Caen.

- - - - - - - - - -

The undersigned officer of Mississippi Power Company does hereby certify that the foregoing is a true and correct copy of a resolution duly and regularly adopted at a meeting of the board of directors of Mississippi Power Company, duly held on October 23, 2018, at which a quorum was in attendance and voting throughout, and that said resolution has not since been rescinded but is still in full force and effect.



Dated:   February 19, 2019
 
MISSISSIPPI POWER COMPANY
 
By
/s/Melissa K. Caen
 
 
Melissa K. Caen
Assistant Secretary






Exhibit 24(e)1

November 8, 2018


Mr. Elliott L. Spencer
Southern Power Company
30 Ivan Allen Jr. Blvd, NW
Atlanta, GA 30308
Ms. Melissa K. Caen
Southern Company Services, Inc.
30 Ivan Allen Jr. Blvd, NW
Atlanta, GA 30308


Mr. Spencer and Ms. Caen:


Southern Power Company (the “Company”) proposes to file or join in the filing of reports under the Securities Exchange Act of 1934, as amended, with the Securities and Exchange Commission with respect to the following: (1) the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 and (2) the Company’s Quarterly Reports on Form 10-Q during 2019.

The Company and the undersigned directors and officers of the Company, individually as a director and/or as an officer of the Company, hereby make, constitute and appoint each of you our true and lawful Attorney for each of us and in each of our names, places and steads to sign and cause to be filed with the Securities and Exchange Commission in connection with the foregoing said Annual Report on Form 10-K, said Quarterly Reports on Form 10-Q and any necessary or appropriate amendment or amendments to any such reports, to be accompanied in each case by any necessary or appropriate exhibits or schedules thereto.

 
Yours very truly,


 
SOUTHERN POWER COMPANY



 
By
/s/Mark S. Lantrip
 
 
Mark S. Lantrip
Chairman, President and Chief
Executive Officer




- 2 -






/s/Andrew W. Evans
 
/s/Mark S. Lantrip
Andrew W. Evans



 
Mark S. Lantrip
/s/Thomas A. Fanning
 
/s/Christopher C. Womack
Thomas A. Fanning



 
Christopher C. Womack
/s/Kimberly S. Greene
 
/s/William C. Grantham
Kimberly S. Greene



 
William C. Grantham
/s/James Y. Kerr, II
 
/s/Elliott L. Spencer
James Y. Kerr, II



 
Elliott L. Spencer






Extract from minutes of meeting of the board of directors of Southern Power Company.

- - - - - - - - - -

RESOLVED: That for the purpose of signing the reports under the Securities Exchange Act of 1934 to be filed with the Securities and Exchange Commission with respect to the filing of the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 and its 2019 Quarterly Reports on Form 10-Q, and any necessary or appropriate amendment or amendments to any such reports, the Company, the members of its board of directors and its officers are authorized to give their several powers of attorney to Elliott L. Spencer and Melissa K. Caen.

- - - - - - - - - -

The undersigned officer of Southern Power Company does hereby certify that the foregoing is a true and correct copy of a resolution duly and regularly adopted at a meeting of the board of directors of Southern Power Company, duly held on November 8, 2018, at which a quorum was in attendance and voting throughout, and that said resolution has not since been rescinded but is still in full force and effect.



Dated:   February 19, 2019
 
SOUTHERN POWER COMPANY
 
By
/s/Melissa K. Caen
 
 
Melissa K. Caen
Assistant Secretary






Exhibit 24(e)2



February 5, 2019


Elliott L. Spencer and Melissa K. Caen


Mr. Spencer and Ms. Caen:


As a director of Southern Power Company, I hereby make, constitute, and appoint you my true and lawful Attorney in my name, place, and stead, to sign and cause to be filed with the Securities and Exchange Commission (1) the Company's Annual Report on Form 10-K for the year ended December 31, 2018, (2) the Company's Quarterly Reports on Form 10-Q during 2019 and (3) any necessary or appropriate amendment or amendments to any such reports, to be accompanied in each case by any necessary or appropriate exhibits or schedules thereto.

Yours very truly,

/s/Stan W. Connally

Stan W. Connally




Exhibit 24(f)1

October 23, 2018


Myra C. Bierria and Melissa K. Caen


Ms. Bierria and Ms. Caen:

Southern Company Gas (the “Company”) proposes to file or join in the filing of reports under the Securities Exchange Act of 1934, as amended, with the Securities and Exchange Commission with respect to the following: (1) the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 and (2) the Company’s Quarterly Reports on Form 10-Q during 2019.
The Company and the undersigned directors and officers of the Company, individually as a director and/or as an officer of the Company, hereby make, constitute and appoint each of you our true and lawful Attorney for each of us and in each of our names, places and steads to sign and cause to be filed with the Securities and Exchange Commission in connection with the foregoing said Annual Report on Form 10-K, said Quarterly Reports on Form 10-Q and any necessary or appropriate amendment or amendments to any such reports, to be accompanied in each case by any necessary or appropriate exhibits or schedules thereto.
 
Yours very truly,


 
SOUTHERN COMPANY GAS


 
By
/s/Kimberly S. Greene
 
 
Kimberly S. Greene
Chairman, President and
Chief Executive Officer





- 2 -



/s/Sandra N. Bane
 
/s/John E. Rau
Sandra N. Bane



 
John E. Rau

/s/Thomas D. Bell, Jr.
 
/s/James A. Rubright
Thomas D. Bell, Jr.



 
James A. Rubright

/s/Charles R. Crisp
 
/s/Elizabeth W. Reese
Charles R. Crisp



 
Elizabeth W. Reese
/s/Brenda J. Gaines
 
/s/Grace A. Kolvereid
Brenda J. Gaines



 
Grace A. Kolvereid

/s/Kimberly S. Greene
 
/s/Barbara P. Christopher
Kimberly S. Greene
 
Barbara P. Christopher




- 3 -


Extract from minutes of meeting of the board of directors of Southern Company Gas.

- - - - - - - - - -

RESOLVED, that for the purpose of signing the reports under the Securities Exchange Act of 1934 to be filed with the Securities and Exchange Commission with respect to the filing of the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 and its 2019 Quarterly Reports on Form 10-Q, and any necessary or appropriate amendment or amendments to any such reports, the Company, the members of its Board of Directors and its officers be and hereby are authorized to give their several powers of attorney to Myra C. Bierria and Melissa K. Caen.

- - - - - - - - - -

The undersigned officer of Southern Company Gas does hereby certify that the foregoing is a true and correct copy of a resolution duly and regularly adopted at a meeting of the board of directors of Southern Company Gas, duly held on October 23, 2018, at which a quorum was in attendance and voting throughout, and that said resolution has not since been rescinded but is still in full force and effect.


Dated: February 19, 2019
SOUTHERN COMPANY GAS


 
By
/s/Melissa K. Caen
 
 
Melissa K. Caen
Assistant Secretary






Exhibit 24(f)2
IMAGE0A16.JPG
10 Peachtree Place NE
Atlanta, GA 30309






January 17, 2019


Myra C. Bierria and Melissa K. Caen


Ms. Bierria and Ms. Caen:


As an officer of Southern Company Gas, I hereby make, constitute, and appoint you my true and lawful Attorney in my name, place, and stead, to sign and cause to be filed with the Securities and Exchange Commission (1) the Company's Annual Report on Form 10-K for the year ended December 31, 2018, (2) the Company's Quarterly Reports on Form 10-Q during 2019 and (3) any necessary or appropriate amendment or amendments to any such reports, to be accompanied in each case by any necessary or appropriate exhibits or schedules thereto.

 
Yours very truly,

/s/Daniel S. Tucker

Daniel S. Tucker






Exhibit 31(a)1
THE SOUTHERN COMPANY
CERTIFICATION OF CHIEF EXECUTIVE OFFICER
I, Thomas A. Fanning, certify that:
1.
I have reviewed this annual report on Form 10-K of The Southern Company;
2.
Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.
Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4.
The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:
(a)
Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
(b)
Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
(c)
Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
(d)
Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and
5.
The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):
(a)
All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and
(b)
Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:  February 19, 2019
 
/s/Thomas A. Fanning
 
 
Thomas A. Fanning
 
 
Chairman, President and
Chief Executive Officer
 




Exhibit 31(a)2
THE SOUTHERN COMPANY

CERTIFICATION OF CHIEF FINANCIAL OFFICER

I, Andrew W. Evans, certify that:

1.
I have reviewed this annual report on Form 10-K of The Southern Company;
2.
Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.
Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4.
The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:
(a)
Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
(b)
Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
(c)
Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
(d)
Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and
5.
The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):
(a)
All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and
(b)
Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.
Date:  February 19, 2019

 
/s/Andrew W. Evans
 
 
Andrew W. Evans
 
 
Executive Vice President and Chief Financial Officer
 




Exhibit 31(b)1

ALABAMA POWER COMPANY

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

I, Mark A. Crosswhite, certify that:

1.
I have reviewed this annual report on Form 10-K of Alabama Power Company;
2.
Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.
Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4.
The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:
(a)
Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
(b)
Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
(c)
Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
(d)
Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and
5.
The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):
(a)
All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and
(b)
Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:  February 19, 2019
 
/s/Mark A. Crosswhite
 
 
Mark A. Crosswhite
 
 
Chairman, President and Chief Executive Officer
 




Exhibit 31(b)2
ALABAMA POWER COMPANY

CERTIFICATION OF CHIEF FINANCIAL OFFICER

I, Philip C. Raymond, certify that:

1.
I have reviewed this annual report on Form 10-K of Alabama Power Company;
2.
Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.
Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4.
The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:
(a)
Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
(b)
Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
(c)
Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
(d)
Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and
5.
The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):
(a)
All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and
(b)
Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.
 
Date:  February 19, 2019

 
/s/Philip C. Raymond
 
 
Philip C. Raymond
 
 
Executive Vice President, Chief Financial Officer
and Treasurer
 




Exhibit 31(c)1
GEORGIA POWER COMPANY

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

I, W. Paul Bowers, certify that:

1.
I have reviewed this annual report on Form 10-K of Georgia Power Company;
2.
Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.
Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4.
The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:
(a)
Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
(b)
Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
(c)
Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
(d)
Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and
5.
The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):
(a)
All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and
(b)
Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:  February 19, 2019

 
/s/W. Paul Bowers
 
 
W. Paul Bowers
 
 
Chairman, President and Chief Executive Officer
 




Exhibit 31(c)2
GEORGIA POWER COMPANY

CERTIFICATION OF CHIEF FINANCIAL OFFICER

I, Xia Liu, certify that:

1.
I have reviewed this annual report on Form 10-K of Georgia Power Company;
2.
Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.
Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4.
The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:
(a)
Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
(b)
Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
(c)
Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
(d)
Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and
5.
The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):
(a)
All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and
(b)
Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:  February 19, 2019
 
/s/Xia Liu
 
 
Xia Liu
 
 
Executive Vice President, Chief Financial Officer and Treasurer
 




Exhibit 31(d)1

MISSISSIPPI POWER COMPANY

CERTIFICATION OF CHIEF EXECUTIVE OFFICER


I, Anthony L. Wilson, certify that:

1.
I have reviewed this annual report on Form 10-K of Mississippi Power Company;
2.
Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.
Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4.
The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:
(a)
Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
(b)
Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
(c)
Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
(d)
Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and
5.
The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):
(a)
All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and
(b)
Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

 
Date:  February 19, 2019
 
/s/Anthony L. Wilson
 
 
Anthony L. Wilson
 
 
Chairman, President and
 Chief Executive Officer
 




Exhibit 31(d)2
MISSISSIPPI POWER COMPANY

CERTIFICATION OF CHIEF FINANCIAL OFFICER

I, Moses H. Feagin, certify that:

1.
I have reviewed this annual report on Form 10-K of Mississippi Power Company;
2.
Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.
Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4.
The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:
(a)
Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
(b)
Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
(c)
Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
(d)
Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and
5.
The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):
(a)
All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and
(b)
Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.


Date:  February 19, 2019

 
/s/Moses H. Feagin
 
 
Moses H. Feagin
 
 
Vice President, Treasurer and
Chief Financial Officer
 





Exhibit 31(e)1
SOUTHERN POWER COMPANY
CERTIFICATION OF CHIEF EXECUTIVE OFFICER

I, Mark S. Lantrip, certify that:

1.
I have reviewed this annual report on Form 10-K of Southern Power Company;
2.
Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.
Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4.
The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:
(a)
Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
(b)
Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
(c)
Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
(d)
Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and
5.
The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):
(a)
All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and
(b)
Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:   February 19, 2019

 
/s/Mark S. Lantrip
 
 
Mark S. Lantrip
 
 
Chairman, President and Chief Executive Officer
 




Exhibit 31(e)2
SOUTHERN POWER COMPANY

CERTIFICATION OF CHIEF FINANCIAL OFFICER

I, William C. Grantham, certify that:

1.
I have reviewed this annual report on Form 10-K of Southern Power Company;
2.
Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.
Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4.
The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:
(a)
Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
(b)
Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
(c)
Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
(d)
Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and
5.
The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):
(a)
All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and
(b)
Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.
 
 
Date:  February 19, 2019

 
/s/William C. Grantham
 
 
William C. Grantham
 
 
Senior Vice President, Treasurer and Chief
Financial Officer
 




Exhibit 31(f)1
SOUTHERN COMPANY GAS

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

I, Kimberly S. Greene, certify that:

1.
I have reviewed this annual report on Form 10-K of Southern Company Gas;
2.
Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.
Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4.
The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:
(a)
Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
(b)
Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
(c)
Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
(d)
Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and
5.
The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):
(a)
All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and
(b)
Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.
 

Date:  February 19, 2019

 
/s/Kimberly S. Greene
 
 
Kimberly S. Greene
 
 
Chairman, President, and Chief Executive Officer
 




Exhibit 31(f)2
SOUTHERN COMPANY GAS

CERTIFICATION OF CHIEF FINANCIAL OFFICER

I, Daniel S. Tucker, certify that:

1.
I have reviewed this annual report on Form 10-K of Southern Company Gas;
2.
Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.
Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4.
The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:
(a)
Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
(b)
Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
(c)
Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
(d)
Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and
5.
The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):
(a)
All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and
(b)
Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:  February 19, 2019
 
/s/Daniel S. Tucker
 
 
Daniel S. Tucker
 
 
Executive Vice President, Chief Financial
Officer, and Treasurer
 




Exhibit 32(a)









CERTIFICATION

18 U.S.C. SECTION 1350
AS ADOPTED PURSUANT TO SECTION 906 OF THE
SARBANES-OXLEY ACT OF 2002


In connection with the accompanying Annual Report on Form 10-K of The Southern Company for the year ended December 31, 2018, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of our individual knowledge and belief, that:

(1)
such Annual Report on Form 10-K of The Southern Company for the year ended December 31, 2018, which this statement accompanies, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)
the information contained in such Annual Report on Form 10-K of The Southern Company for the year ended December 31, 2018, fairly presents, in all material respects, the financial condition and results of operations of The Southern Company.


 
/s/Thomas A. Fanning
 
Thomas A. Fanning
 
Chairman, President and
Chief Executive Officer
 
 
 
/s/Andrew W. Evans
 
Andrew W. Evans
 
Executive Vice President and
Chief Financial Officer


February 19, 2019






Exhibit 32(b)








CERTIFICATION
 
18 U.S.C. SECTION 1350
AS ADOPTED PURSUANT TO SECTION 906 OF THE
SARBANES-OXLEY ACT OF 2002


In connection with the accompanying Annual Report on Form 10-K of Alabama Power Company for the year ended December 31, 2018, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of our individual knowledge and belief, that:

(1)
such Annual Report on Form 10-K of Alabama Power Company for the year ended December 31, 2018, which this statement accompanies, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)
the information contained in such Annual Report on Form 10-K of Alabama Power Company for the year ended December 31, 2018, fairly presents, in all material respects, the financial condition and results of operations of Alabama Power Company.


 
/s/Mark A. Crosswhite
 
Mark A. Crosswhite
 
Chairman, President and Chief Executive Officer
 
 
 
/s/Philip C. Raymond
 
Philip C. Raymond
 
Executive Vice President,
Chief Financial Officer and Treasurer


February 19, 2019








Exhibit 32(c)







CERTIFICATION
 
18 U.S.C. SECTION 1350
AS ADOPTED PURSUANT TO SECTION 906 OF THE
SARBANES-OXLEY ACT OF 2002


In connection with the accompanying Annual Report on Form 10-K of Georgia Power Company for the year ended December 31, 2018, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of our individual knowledge and belief, that:

(1)
such Annual Report on Form 10-K of Georgia Power Company for the year ended December 31, 2018, which this statement accompanies, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)
the information contained in such Annual Report on Form 10-K of Georgia Power Company for the year ended December 31, 2018, fairly presents, in all material respects, the financial condition and results of operations of Georgia Power Company.


 
/s/W. Paul Bowers
 
W. Paul Bowers
 
Chairman, President and Chief Executive Officer
 
 
 
/s/Xia Liu
 
Xia Liu
 
Executive Vice President, Chief Financial Officer and Treasurer


February 19, 2019







Exhibit 32(d)






CERTIFICATION
 
18 U.S.C. SECTION 1350
AS ADOPTED PURSUANT TO SECTION 906 OF THE
SARBANES-OXLEY ACT OF 2002


In connection with the accompanying Annual Report on Form 10-K of Mississippi Power Company for the year ended December 31, 2018, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of our individual knowledge and belief, that:

(1)
such Annual Report on Form 10-K of Mississippi Power Company for the year ended December 31, 2018, which this statement accompanies, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)
the information contained in such Annual Report on Form 10-K of Mississippi Power Company for the year ended December 31, 2018, fairly presents, in all material respects, the financial condition and results of operations of Mississippi Power Company.


 
/s/Anthony L. Wilson
 
Anthony L. Wilson
 
Chairman, President and Chief Executive Officer
 
 
 
/s/Moses H. Feagin
 
Moses H. Feagin
 
Vice President, Treasurer and
Chief Financial Officer


February 19, 2019




Exhibit 32(e)





CERTIFICATION
 
18 U.S.C. SECTION 1350
AS ADOPTED PURSUANT TO SECTION 906 OF THE
SARBANES-OXLEY ACT OF 2002


In connection with the accompanying Annual Report on Form 10-K of Southern Power Company for the year ended December 31, 2018, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of our individual knowledge and belief, that:

(1)
such Annual Report on Form 10-K of Southern Power Company for the year ended December 31, 2018, which this statement accompanies, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)
the information contained in such Annual Report on Form 10-K of Southern Power Company for the year ended December 31, 2018, fairly presents, in all material respects, the financial condition and results of operations of Southern Power Company.


 
/s/Mark S. Lantrip
 
Mark S. Lantrip
 
 Chairman, President
and Chief Executive Officer
 
 
 
/s/William C. Grantham
 
William C. Grantham
 
Senior Vice President, Treasurer and
Chief Financial Officer


February 19, 2019




Exhibit 32(f)







CERTIFICATION

18 U.S.C. SECTION 1350
AS ADOPTED PURSUANT TO SECTION 906 OF THE
SARBANES-OXLEY ACT OF 2002


In connection with the accompanying Annual Report on Form 10-K of Southern Company Gas for the year ended December 31, 2018, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of our individual knowledge and belief, that:

(1)
such Annual Report on Form 10-K of Southern Company Gas for the year ended December 31, 2018, which this statement accompanies, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)
the information contained in such Annual Report on Form 10-K of Southern Company Gas for the year ended December 31, 2018, fairly presents, in all material respects, the financial condition and results of operations of Southern Company Gas.


 
/s/Kimberly S. Greene
 
Kimberly S. Greene
 
Chairman, President, and Chief Executive Officer
 
 
 
/s/Daniel S. Tucker
 
Daniel S. Tucker
 
Executive Vice President, Chief Financial
Officer, and Treasurer


February 19, 2019








Exhibit 99(f)





CONSOLIDATED FINANCIAL STATEMENTS
With Report of Independent Registered Public Accounting Firm

SOUTHERN NATURAL GAS COMPANY, L.L.C.

As of December 31, 2018 and 2017,
For the Years Ended December 31, 2018 , and 2017 and
the Four Months Ended December 31, 2016






SOUTHERN NATURAL GAS COMPANY, L.L.C. AND SUBSIDIARY
TABLE OF CONTENTS

 
Page
Number
Reports of Independent Registered Public Accounting Firms
1
 
 
Consolidated Financial Statements
 
Consolidated Statements of Income
3
Consolidated Balance Sheets
4
Consolidated Statements of Cash Flows
5
Consolidated Statements of Members' Equity
6
Notes to Consolidated Financial Statements
7


2











Report of Independent Registered Public Accounting Firm

To the Board of Directors and Members of Southern Natural Gas Company, L.L.C.

Opinion on the Financial Statements

We have audited the consolidated balance sheet of Southern Natural Gas Company, L.L.C. and its subsidiary (the “Company”) as of December 31, 2017, and the related consolidated statements of income, of cash flows and of members’ equity for the year ended December 31, 2017 and for the four months ended December 31, 2016, including the related notes (collectively referred to as the “consolidated financial statements”), before the effects of the adjustments to retrospectively reflect the change in accounting for retirement benefits described in Note 2. In our opinion, the consolidated financial statements, before the effects of the adjustments to retrospectively reflect the change in accounting for retirement benefits described in Note 2, present fairly, in all material respects, the financial position of the Company as of December 31, 2017, and the results of its operations and its cash flows for the year ended December 31, 2017 and for the four months ended December 31, 2016 in conformity with accounting principles generally accepted in the United States of America (the 2017 financial statements before the effects of the adjustments discussed in Note 2 are not presented herein).

We were not engaged to audit, review, or apply any procedures to the adjustments to retrospectively reflect the change in accounting for retirement benefits described in Note 2 and accordingly, we do not express an opinion or any other form of assurance about whether such adjustments are appropriate and have been properly applied. Those adjustments were audited by other auditors.

Basis for Opinion

These consolidated financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company’s consolidated financial statements, before the effects of the adjustments described above, based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits of these consolidated financial statements, before the effects of the adjustments described above, in accordance with the auditing standards of the PCAOB and in accordance with auditing standards generally accepted in the United States of America. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud.

Our audits included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. We believe that our audits provide a reasonable basis for our opinion.





Significant Transactions with Related Parties

As discussed in Note 6 to the consolidated financial statements, the Company has entered into significant
transactions with related parties.

/s/ PricewaterhouseCoopers LLP

Houston, Texas
February 15, 2018

We served as the Company's auditor from 2012 to 2018.











Report of Independent Registered Public Accounting Firm


Board of Directors and Members
Southern Natural Gas Company, L.L.C.
Houston, Texas

Opinion on the Consolidated Financial Statements

We have audited the accompanying consolidated balance sheet of Southern Natural Gas Company, L.L.C. (the “Company”) and its subsidiary as of December 31, 2018, the related consolidated statements of income, members’ equity, and cash flows for the year then ended, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company and its subsidiary at December 31, 2018, and the results of their operations and their cash flows for the year ended December 31, 2018 , in conformity with accounting principles generally accepted in the United States of America.

We also have audited the adjustments to the 2017 and 2016 consolidated financial statements to retrospectively reflect the change in accounting for retirement benefits described in Note 2. In our opinion, such adjustments are appropriate and have been properly applied. We were not engaged to audit, review, or apply any procedures to the 2017 and 2016 consolidated financial statements of Southern Natural Gas Company L.L.C. and its subsidiary other than with respect to the adjustments and, accordingly, we do not express an opinion or any other form of assurance on the 2017 and 2016 consolidated financial statements taken as a whole.

Basis for Opinion

These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s consolidated financial statements based on our audit. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (“PCAOB”) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB and in accordance with auditing standards generally accepted in the United States of America. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud. Our audit included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audit also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. We believe that our audit provides a reasonable basis for our opinion.

Emphasis of Matter - Significant Transactions with Related Parties

As discussed in Note 6 to the consolidated financial statements, the Company has entered into significant transactions with related parties.

/s/ BDO USA, LLP

We have served as the Company's auditor since 2018.

Houston, Texas
February 15, 2019





SOUTHERN NATURAL GAS COMPANY, L.L.C. AND SUBSIDIARY
CONSOLIDATED STATEMENTS OF INCOME
(In Millions)

 
Year Ended December 31,
 
Four Months
 ended
December 31,
 
2018
 
2017
 
2016
Revenues
$
604
 
 
$
544
 
 
$
230
 
 
 
 
 
 
 
Operating Costs and Expenses
 
 
 
 
 
Operations and maintenance
139
 
 
146
 
 
39
 
Depreciation and amortization
82
 
 
85
 
 
27
 
General and administrative
36
 
 
34
 
 
14
 
Taxes, other than income taxes
37
 
 
37
 
 
13
 
Total Operating Costs and Expenses
294
 
 
302
 
 
93
 
 
 
 
 
 
 
Operating Income
310
 
 
242
 
 
137
 
 
 
 
 
 
 
Other Income (Expense)
 
 
 
 
 
Earnings from equity investment
9
 
 
8
 
 
2
 
Interest, net
(65
)
 
(69
)
 
(26
)
Other, net
7
 
 
(6
)
 
2
 
Total Other Income (Expense)
(49
)
 
(67
)
 
(22
)
 
 
 
 
 
 
Net Income
$
261

 
$
175

 
$
115


The accompanying notes are an integral part of these consolidated financial statements.



3



SOUTHERN NATURAL GAS COMPANY, L.L.C. AND SUBSIDIARY
CONSOLIDATED BALANCE SHEETS
(In Millions)

 
December 31,
 
2018
 
2017
ASSETS
 
 
 
Current assets
 
 
 
Cash and cash equivalents
$
10
 
 
$
4
 
Accounts receivable, net
32
 
 
35
 
Accounts receivable from affiliates
19
 
 
19
 
Inventories
19
 
 
18
 
Regulatory assets
23
 
 
2
 
Other current assets
1
 
 
4
 
Total current assets
104
 
 
82
 
 
 
 
 
Property, plant and equipment, net
2,606
 
 
2,439
 
Investment
65
 
 
63
 
Regulatory assets
22
 
 
23
 
Deferred charges and other assets
34
 
 
35
 
Total Assets
$
2,831
 
 
$
2,642
 
 
 
 
 
LIABILITIES AND MEMBERS' EQUITY
 
 
 
Current liabilities
 
 
 
Current portion of debt
$
 
 
$
13
 
Accounts payable
28
 
 
21
 
Accounts payable to affiliates
24
 
 
15
 
Accrued interest
17
 
 
17
 
Accrued taxes, other than income taxes
19
 
 
20
 
Regulatory liabilities
5
 
 
15
 
Other current liabilities
10
 
 
9
 
Total current liabilities
103
 
 
110
 
 
 
 
 
Long-term liabilities and deferred credits
 
 
 
Long-term debt, net of debt issuance costs
1,103
 
 
1,102
 
Capital payment obligation (Note 9)
142
 
 
 
Other long-term liabilities and deferred credits
70
 
 
76
 
Total long-term liabilities and deferred credits
1,315
 
 
1,178
 
Total Liabilities
1,418
 
 
1,288
 
 
 
 
 
Commitments and contingencies (Note 10)
 
 
 
Members' Equity
1,413
 
 
1,354
 
Total Liabilities and Members' Equity
$
2,831
 
 
$
2,642
 

The accompanying notes are an integral part of these consolidated financial statements.



4



SOUTHERN NATURAL GAS COMPANY, L.L.C. AND SUBSIDIARY
CONSOLIDATED STATEMENTS OF CASH FLOWS
(In Millions)
 
Year Ended December 31,
 
Four Months Ended December 31,
 
2018
 
2017
 
2016
Cash Flows From Operating Activities
 
 
 
 
 
Net income
$
261
 
 
$
175
 
 
$
115
 
Adjustments to reconcile net income to net cash provided by operating activities:
 
 
 
 
 
Depreciation and amortization
82
 
 
85
 
 
27
 
Earnings from equity investment
(9
)
 
(8
)
 
(2
)
Other non-cash items
(5
)
 
1
 
 
1
 
Distributions from equity investment earnings
7
 
 
6
 
 
3
 
Changes in components of working capital:
 
 
 
 
 
Accounts receivable
3
 
 
8
 
 
(7
)
Regulatory assets
(21
)
 
2
 
 
5
 
Accounts payable
6
 
 
1
 
 
10
 
Accrued interest
 
 
(2
)
 
(7
)
Accrued taxes, other than income
(1
)
 
(2
)
 
(4
)
Regulatory liabilities
(11
)
 
12
 
 
1
 
Other current assets and liabilities
3
 
 
3
 
 
 
Other long-term assets and liabilities
21
 
 
50
 
 
(1
)
Net Cash Provided by Operating Activities
336
 
 
331
 
 
141
 
 
 
 
 
 
 
Cash Flows From Investing Activities
 
 
 
 
 
Capital expenditures
(111
)
 
(53
)
 
(33
)
Other, net
(4
)
 
(5
)
 
 
Net Cash Used in by Investing Activities
(115
)
 
(58
)
 
(33
)
 
 
 
 
 
 
Cash Flows From Financing Activities
 
 
 
 
 
Issuances of debt
175
 
 
570
 
 
56
 
Payments of debt
(188
)
 
(659
)
 
(56
)
Debt issuance costs
 
 
(4
)
 
 
Contributions from Members
98
 
 
108
 
 
15
 
Distributions to Members
(300
)
 
(288
)
 
(119
)
Net Cash Used in Financing Activities
(215
)
 
(273
)
 
(104
)
 
 
 
 
 
 
Net Change in Cash and Cash Equivalents
6
 
 
 
 
4
 
Cash and Cash Equivalents, beginning of period
4
 
 
4
 
 
 
Cash and Cash Equivalents, end of period
$
10
 
 
$
4
 
 
$
4
 
 
 
 
 
 
 
Non-cash Investing Activities
 
 
 
 
 
Net increase in property, plant and equipment accruals
$
152
 
 
 
 
 
 
 
 
 
 
 
Supplemental Disclosure of Cash Flow Information
 
 
 
 
 
Cash paid during the period for interest (net of capitalized interest)
$
63
 
 
$
69
 
 
$
24
 

The accompanying notes are an integral part of these consolidated financial statements.


5



SOUTHERN NATURAL GAS COMPANY, L.L.C. AND SUBSIDIARY
CONSOLIDATED STATEMENTS OF MEMBERS' EQUITY
(In Millions)

 
Year Ended December 31,
 
Four Months Ended December 31,
 
2018
 
2017
 
2016
Beginning Balance
$
1,354
 
 
$
1,359
 
 
$
1,348
 
Net income
261
 
 
175
 
 
115
 
Contributions
98
 
 
108
 
 
15
 
Distributions
(300
)
 
(288
)
 
(119
)
Ending Balance
$
1,413
 
 
$
1,354
 
 
$
1,359
 

The accompanying notes are an integral part of these consolidated financial statements.



6



SOUTHERN NATURAL GAS COMPANY, L.L.C. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. General

We are a Delaware limited liability company, originally formed in 1935 as a corporation. When we refer to “us,” “we,” “our,” “ours,” “the Company,” or “SNG,” we are describing Southern Natural Gas Company, L.L.C and its consolidated subsidiary.

Prior to September 2016, we were an indirect wholly owned subsidiary of Kinder Morgan, Inc. (KMI).  On September 1, 2016, KMI completed the sale of a 50% interest in SNG to The Southern Company (TSC).  We continue to be operated by KMI.

The member interests in us are as follows:

50.0% - Kinder Morgan SNG Operator, LLC, an indirect subsidiary of KMI; and
50.0% - Evergreen Enterprise Holdings, LLC, an indirect subsidiary of TSC.

Our operations are regulated by the Federal Energy Regulatory Commission (FERC) under the Natural Gas Act of 1938, the Natural Gas Policy Act of 1978 and the Energy Policy Act of 2005. The FERC approves tariffs that establish rates, cost recovery mechanisms and other terms and conditions of service to our customers.

Our primary business consists of the interstate transportation and storage of natural gas. Our natural gas pipeline system consists of approximately 6,950 miles of pipeline with a design capacity of approximately 4.3 billion cubic feet (Bcf) per day for natural gas. This pipeline system extends from supply basins in Louisiana, Mississippi and Alabama to market areas in Louisiana, Mississippi, Alabama, Florida, Georgia, South Carolina and Tennessee, including the metropolitan areas of Atlanta and Birmingham. We also own and operate 100% of the Muldon storage facility in Monroe County, Mississippi and own a 50% interest in Bear Creek Storage Company, L.L.C. (Bear Creek) in Bienville Parish, Louisiana. Bear Creek is a joint venture equally owned by us and Tennessee Gas Pipeline Company, L.L.C., an affiliate. Our interest in Bear Creek, the Muldon storage facilities and contracted storage have a combined working natural gas storage capacity of approximately 69 Bcf and peak withdrawal capacity of approximately 1.3 Bcf per day.


2. Summary of Significant Accounting Policies

Basis of Presentation

We have prepared our accompanying consolidated financial statements in accordance with the accounting principles contained in the Financial Accounting Standards Board's (FASB) Accounting Standards Codification, the single source of United States Generally Accepted Accounting Principles (GAAP) and referred to in this report as the Codification. Additionally, certain amounts from the prior year have been reclassified to conform to the current presentation.

We have included financial statements for the four month period ending December 31, 2016 in order to provide information beginning with the date of the sale as described above in Footnote 1.

Management has evaluated subsequent events through February 15, 2019, the date the financial statements were available to be issued.
    
Principles of Consolidation

We consolidate entities when we have the ability to control or direct the operating and financial decisions of the entity or when we have a significant interest in the entity that gives us the ability to direct the activities that are significant to that entity. The determination of our ability to control, direct or exert significant influence over an entity involves the use of judgment. All significant intercompany items have been eliminated in consolidation.

Adoption of New Accounting Pronouncements

On January 1, 2018, we adopted Accounting Standard Update (ASU) No. 2014-09, “Revenue from Contracts with Customers” and the series of related accounting standard updates that followed (collectively referred to as “Topic 606”). We utilized the modified retrospective method to adopt Topic 606, which required us to apply the new revenue standard to (i) all new revenue

7



contracts entered into after January 1, 2018 and (ii) revenue contracts which were not completed as of January 1, 2018. In accordance with this approach, our consolidated revenues for periods prior to January 1, 2018 were not revised. There was no cumulative adjustment as of January 1, 2018 resulting from the adoption of Topic 606. For more information, see “—Revenue Recognition” below and Note 8.

On January 1, 2018, we adopted ASU No. 2017-07, “Compensation - Retirement Benefits (Topic 715).” This ASU requires an employer to disaggregate the service cost component from the other components of net benefit cost, allows only the service cost component of net benefit cost to be eligible for capitalization and establishes how to present the service cost component and the other components of net benefit cost in the income statement. Topic 715 required us to retrospectively reclassify $4 million of other components of net benefit credits (excluding the service cost component) from “General and administrative” to “Other, net” in our accompanying Consolidated Statement of Income for the year ended December 31, 2017. We prospectively applied Topic 715 related to net benefit costs eligible for capitalization.

Use of Estimates

Certain amounts included in or affecting our financial statements and related disclosures must be estimated, requiring us to make certain assumptions with respect to values or conditions which cannot be known with certainty at the time our financial statements are prepared. These estimates and assumptions affect the amounts we report for assets and liabilities, our revenues and expenses during the reporting period, and our disclosures, including as it relates to contingent assets and liabilities at the date of our financial statements. We evaluate these estimates on an ongoing basis, utilizing historical experience, consultation with experts and other methods we consider reasonable in the particular circumstances. Nevertheless, actual results may differ significantly from our estimates. Any effects on our business, financial position or results of operations resulting from revisions to these estimates are recorded in the period in which the facts that give rise to the revision become known.

In addition, we believe that certain accounting policies are of more significance in our financial statement preparation process than others, and set out below are the principal accounting policies we apply in the preparation of our consolidated financial statements.

Cash Equivalents

We define cash equivalents as all highly liquid short-term investments with original maturities of three months or less.

Accounts Receivable, net

We establish provisions for losses on accounts receivable due from shippers and operators if we determine that we will not collect all or part of the outstanding balance. We regularly review collectability and establish or adjust our allowance as necessary using the specific identification method. The allowance for doubtful accounts as of December 31, 2018 and 2017 was not significant.

Inventories

Our inventories, which consist of materials and supplies, are valued at weighted-average cost, and we periodically review for physical deterioration and obsolescence.

Natural Gas Imbalances

Natural gas imbalances occur when the amount of natural gas delivered from or received by a pipeline system or storage facility differs from the scheduled amount of gas to be delivered or received. We value these imbalances due to or from shippers and operators at current index prices. Imbalances are settled in cash or made up in-kind, subject to the terms of our FERC tariff. Imbalances due from others are reported on our accompanying Consolidated Balance Sheets in “Other current assets.” Imbalances owed to others are reported on our accompanying Consolidated Balance Sheets in “Other current liabilities.” We classify all imbalances due from or owed to others as current as we expect to settle them within a year.

8




Property, Plant and Equipment, net

Our property, plant and equipment is recorded at its original cost of construction or, upon acquisition, at either the fair value of the assets acquired or the cost to the entity that first placed the asset in utility service. For constructed assets, we capitalize all construction-related direct labor and material costs, as well as indirect construction costs. Our indirect construction costs primarily include an interest and equity return component (as more fully described below) and labor and related costs associated with supporting construction activities. The indirect capitalized labor and related costs are based upon estimates of time spent supporting construction projects.

We use the composite method to depreciate property, plant and equipment. Under this method, assets with similar economic characteristics are grouped and depreciated as one asset. The FERC-accepted depreciation rate is applied to the total cost of the group until the net book value equals the salvage value. For certain general plant, the asset is depreciated to zero. As part of periodic filings with the FERC, we also re-evaluate and receive approval for our depreciation rates. When property, plant and equipment is retired, accumulated depreciation and amortization is charged for the original cost of the assets in addition to the cost to remove, sell or dispose of the assets, less salvage value. We do not recognize gains or losses unless we sell land or an entire operating unit (as approved by the FERC). In those instances where we receive recovery in rates related to losses on dispositions of operating units, we record a regulatory asset for the estimated recoverable amount.

Included in our property balances are base gas and working gas at our storage facilities. We periodically evaluate natural gas volumes at our storage facilities for gas losses. When events or circumstances indicate a loss has occurred, we recognize a loss on our accompanying Consolidated Statements of Income or defer the loss as a regulatory asset on our accompanying Consolidated Balance Sheets if deemed probable of recovery through future rates charged to customers.

We capitalize a carrying cost (an allowance for funds used during construction or AFUDC) on debt and equity funds related to the construction of long-lived assets. This carrying cost consists of a return on the investment financed by debt and a return on the investment financed by equity. The debt portion is calculated based on our average cost of debt. Interest costs capitalized are included as a reduction in “Interest, net” on our accompanying Consolidated Statements of Income. The equity portion is calculated based on our most recent FERC approved rate of return. Equity amounts capitalized are included in “Other, net” on our accompanying Consolidated Statements of Income. The amounts of capitalized AFUDC were not significant for the years ended December 31, 2018 and 2017 and the four months ended December 31, 2016.

Asset Retirement Obligations (ARO)

We record liabilities for obligations related to the retirement and removal of long-lived assets used in our businesses. We record, as liabilities, the fair value of ARO on a discounted basis when they are incurred and can be reasonably estimated, which is typically at the time the assets are installed or acquired.  Amounts recorded for the related assets are increased by the amount of these obligations. Over time, the liabilities increase due to the change in their present value, and the initial capitalized costs are depreciated over the useful lives of the related assets.  The liabilities are eventually extinguished when the asset is taken out of service.

We are required to operate and maintain our natural gas pipelines and storage systems, and intend to do so as long as supply and demand for natural gas exists, which we expect for the foreseeable future. Therefore, we believe that we cannot reasonably estimate the ARO for the substantial majority of our assets because these assets have indeterminate lives. We continue to evaluate our ARO and future developments could impact the amounts we record. Our recorded ARO were not significant as of December 31, 2018 and 2017.

Asset and Investment Impairments

We evaluate our assets and investments for impairment when events or circumstances indicate that their carrying values may not be recoverable. These events include market declines that are believed to be other than temporary, changes in the manner in which we intend to use a long-lived asset, decisions to sell an asset or investment and adverse changes in market conditions or in the legal or business environment such as adverse actions by regulators. If an event occurs, which is a determination that involves judgment, we evaluate the recoverability of our carrying value based on either (i) the long-lived asset's ability to generate future cash flows on an undiscounted basis or (ii) the fair value of the investment in an unconsolidated affiliate. If an impairment is indicated, or if we decide to sell a long-lived asset or group of assets, we adjust the carrying value of the asset downward, if necessary, to its estimated fair value.

9




Our fair value estimates are based on assumptions market participants would use, including market data obtained through the sales process or an analysis of expected discounted future cash flows. There were no impairments for the years ended December 31, 2018 and 2017 and the four months ended December 31, 2016.

Equity Method of Accounting

We account for investments, which we do not control but do have the ability to exercise significant influence, by the equity method of accounting. Under this method, our equity investments are carried originally at our acquisition cost, increased by our proportionate share of the investee’s net income and by contributions made, and decreased by our proportionate share of the investee’s net losses and by distributions received.

Revenue Recognition

Revenue from Contracts with Customers

The unit of account in Topic 606 is a performance obligation, which is a promise in a contract to transfer to a customer either a distinct good or service (or bundle of goods or services) or a series of distinct goods or services provided over a period of time. Topic 606 requires that a contract’s transaction price, which is the amount of consideration to which an entity expects to be entitled in exchange for transferring promised goods or services to a customer, is to be allocated to each performance obligation in the contract based on relative standalone selling prices and recognized as revenue when (point in time) or as (over time) the performance obligation is satisfied.

Our revenues are primarily generated from the transportation and storage of natural gas under firm service customer contracts with take-or-pay elements (principally for capacity reservation) where both the price and quantity are fixed. Generally, for these contracts: (i) our promise is to transfer (or stand ready to transfer) a series of distinct integrated services over a period of time, which is a single performance obligation; (ii) the transaction price includes both fixed and/or variable consideration which is determinable at contract inception and/or at each month end based on our right to invoice at month end for the value of services provided to the customer that month; and (iii) the transaction price is recognized as revenue over the service period specified in the contract as the services are rendered. In these arrangements, the customer is obligated to pay for services associated with its take-or-pay obligation regardless of whether or not the customer chooses to utilize the service in that period. Because we make the service continuously available over the service period, we recognize the take-or-pay amount as revenue ratably over such period based on the passage of time.

The natural gas we receive under our transportation and storage contracts remains under the control of our customers. In many cases, generally described as firm service, the customer generally pays a two-part transaction price that includes (i) a fixed fee reserving the right to transport natural gas in our facilities up to contractually specified capacity levels (referred to as “reservation”) and (ii) a per-unit rate for quantities of natural gas actually transported or stored. In our firm service contracts we generally promise to provide a single integrated service each day over the life of the contract, which is fundamentally a stand-ready obligation to provide services up to the customer’s reservation capacity prescribed in the contract. Our customers have a take-or-pay payment obligation with respect to the fixed reservation fee component, regardless of the quantities they actually transport or store. In other cases, generally described as interruptible service, there is no fixed fee associated with these services because the customer accepts the possibility that service may be interrupted at our discretion in order to serve customers who have firm service contracts. We do not have an obligation to perform under interruptible customer arrangements until we accept and schedule the customer’s request for periodic service. The customer pays a transaction price based on a per-unit rate for the quantities actually transported or stored.

Refer to Note 8 for further information.

Revenue Recognition Policy prior to January 1, 2018

Prior to the implementation of Topic 606, we estimated our earned but unbilled revenues from natural gas transportation and storage services based on contract data, regulatory information, and preliminary throughput and allocation measurements, among other items. Revenues for all services were based on the thermal quantity of gas delivered or subscribed at a price specified in the contract. We recognized reservation revenues on firm contracted capacity ratably over the contract period regardless of the amount of natural gas that was transported or stored. For interruptible or volumetric-based services, we recorded revenues when physical deliveries of natural gas were made at the agreed upon delivery point or when the gas was injected or withdrawn from the storage facility. For contracts with step-up or step-down rate provisions that were not related to changes in levels of service, we recognized reservation revenues ratably over the contract life.

10




Environmental Matters

We capitalize or expense, as appropriate, environmental expenditures. We capitalize certain environmental expenditures required in obtaining rights-of-way, regulatory approvals or permitting as part of the construction. We accrue and expense environmental costs that relate to an existing condition caused by past operations, which do not contribute to current or future revenue generation. We generally do not discount environmental liabilities to a net present value, and we record environmental liabilities when environmental assessments and/or remedial efforts are probable and we can reasonably estimate the costs. Generally, our recording of these accruals coincides with our completion of a feasibility study or our commitment to a formal plan of action. We recognize receivables for anticipated associated insurance recoveries when such recoveries are deemed to be probable.

We routinely conduct reviews of potential environmental issues and claims that could impact our assets or operations. These reviews assist us in identifying environmental issues and estimating the costs and timing of remediation efforts. We also routinely adjust our environmental liabilities to reflect changes in previous estimates. In making environmental liability estimations, we consider the material effect of environmental compliance, pending legal actions against us, and potential third-party liability claims. Often, as the remediation evaluation and effort progresses, additional information is obtained, requiring revisions to estimated costs. These revisions are reflected in our income in the period in which they are reasonably determinable. For more information on our environmental matters, see Note 10.

Other Contingencies

We recognize liabilities for other contingencies when we have an exposure that indicates it is both probable that a liability has been incurred and the amount of loss can be reasonably estimated. Where the most likely outcome of a contingency can be reasonably estimated, we accrue an undiscounted liability for that amount. Where the most likely outcome cannot be estimated, a range of potential losses is established and if no one amount in that range is more likely than any other, the low end of the range is accrued.

Postretirement Benefits

We maintain a postretirement benefit plan covering certain of our former employees that we have made contributions to in the past. These contributions are invested until the benefits are paid to plan participants. The net benefit cost of this plan is recorded on our accompanying Consolidated Statements of Income and is a function of many factors including expected returns on plan assets and amortization of certain deferred gains and losses. For more information on our policies with respect to our postretirement benefit plan, see Note 5.

In accounting for our postretirement benefit plan, we record an asset or liability based on the difference between the fair value of the plan's assets and the plan's benefit obligation. Any deferred amounts related to unrecognized gains and losses or changes in actuarial assumptions are recorded on our Consolidated Balance Sheets as a regulatory asset or liability until those gains or losses are recognized on our accompanying Consolidated Statements of Income.

Income Taxes

We are a limited liability company that is treated as a partnership for income tax purposes and are not subject to federal or state income taxes. Our Members are responsible for income taxes on their allocated share of taxable income which may differ from income for financial statement purposes due to differences in the tax basis and financial reporting basis of assets and liabilities.

Regulatory Assets and Liabilities

Our interstate natural gas pipeline and storage operations are subject to the jurisdiction of the FERC and are accounted for in accordance with Accounting Standards Codification Topic 980, “Regulated Operations.” Under these standards, we record regulatory assets and liabilities that would not be recorded for non-regulated entities. Regulatory assets and liabilities represent probable future revenues or expenses associated with certain charges and credits that are expected to be recovered from or refunded to customers through the ratemaking process. Items to which we apply regulatory accounting requirements include certain postretirement employee benefit plan costs, losses on reacquired debt, taxes related to an equity return component on regulated capital projects prior to our change in legal structure to a non taxable entity, certain differences between gas retained and gas consumed in operations, amounts associated with the Tax Cuts and Jobs Act of 2017 (2017 Tax Reform) and other costs included in, or expected to be included in, future rates. For more information on our regulated operations, see Note 9.


11



3. Property, Plant and Equipment, net

Our property, plant and equipment, net consisted of the following (in millions, except for %):
 
 
 
December 31,
 
Annual Depreciation Rates %
 
2018
 
2017
Transmission and storage facilities
0.9 - 2.0
 
$
3,927
 
 
$
3,648
 
General plant
3.33 - 20.0
 
19
 
 
19
 
Intangible plant
5.0 - 10.0
 
24
 
 
20
 
Other
 
 
108
 
 
129
 
Accumulated depreciation and amortization(a)
 
 
(1,507
)
 
(1,412
)
 
 
 
2,571
 
 
2,404
 
Land
 
 
14
 
 
13
 
Construction work in progress
 
 
21
 
 
22
 
Property, plant and equipment, net
 
 
$
2,606
 
 
$
2,439
 
_______________
(a)
The composite weighted average depreciation rate for the years ended December 31, 2018 and 2017 were approximately 2.2% and 2.3%, respectively.


4. Debt

We classify our debt based on the contractual maturity dates of the underlying debt instruments. We defer costs associated with debt issuance over the applicable term. These costs are then amortized as interest expense on our accompanying Consolidated Statements of Income.

The following table summarizes the net carrying value of our outstanding debt (in millions):
 
December 31,
 
2018
 
2017
4.40% Notes due June 2021
$
300
 
 
 
$
300
 
 
7.35% Notes due February 2031
153
 
 
 
153
 
 
8.00% Notes due March 2032
258
 
 
 
258
 
 
4.80% Senior Notes due March 2047
400
 
 
 
400
 
 
Credit Facility
 
 
 
13
 
 
 
1,111
 
 
 
1,124
 
 
Less: Unamortized discount and debt issuance costs
8
 
 
 
9
 
 
Total debt
1,103
 
 
 
1,115
 
 
Less: Current portion of debt
 
 
 
13
 
 
Total long-term debt
$
1,103
 
 
 
$
1,102
 
 

Debt Issuance and Repayment

On March 15, 2017 we issued $400 million of 4.80% senior notes due March 2047 and incurred debt issuance costs of $4 million. On April 3, 2017 we used the net proceeds of $399 million received from the debt issuance and equity contributions from our Members to repay $500 million of our 5.90% notes due April 2017.

Our notes are redeemable in whole or in part, at our option at any time, at a redeemable price equal to 100% of the principal amount of the notes plus accrued interest to the redemption date plus a make-whole premium.  The stated interest rate on each note is fixed at the level included in the chart above and payable based on a payment schedule set forth in the underlying agreement.

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Credit Facility

Effective September 1, 2016, we entered into a $75 million, unsecured, 5-year revolving credit facility (Credit Facility). The facility is with a syndicate of financial institutions with Barclays Bank PLC as the administrative agent. Borrowings under our Credit Facility can be used for working capital and other general corporate purposes and are included within the caption “Current portion of debt” on our accompanying Consolidated Balance Sheet.

Our Credit Facility borrowings bear interest at either (i) London Interbank Offered Rate (LIBOR) plus an applicable margin ranging from 0.875% to 1.50% per annum based on our credit ratings or (ii) the greatest of the (a) Federal Funds Effective rate plus ½ of 1%, (b) the Prime Rate in effect for such day, and (c) the LIBOR rate for a one-month Eurodollar loan plus 1%, plus, in each case, an applicable margin ranging from nil to 1.5%. In addition, we have agreed to pay the administrative agent a commitment fee, based on our credit rating, ranging from 0.075% to 0.200%.

Our Credit Facility includes the following restrictive covenants:

total debt divided by earnings before interest, income taxes, depreciation and amortization may not exceed 5.00 to 1.00;
certain limitations on indebtedness, including payments and amendments;
certain limitations on entering into mergers, consolidations, sales of assets and investments;
limitations on granting liens; and
prohibitions on making any distributions if an event of default exists or would exist upon making such a distribution.
    
Debt Covenants

Under our various other financing documents, we are subject to certain restrictions and covenants. The most restrictive of these include limitations on the incurrence of liens and limitations on sale-leaseback transactions. For the years ended December 31, 2018 and 2017 and the four months ended December 31, 2016, we were in compliance with our debt-related covenants.


5. Retirement Benefits

Pension and Retirement Savings Plans

KMI maintains a pension plan and a retirement savings plan covering substantially all of its U.S. employees, including certain of our former employees. The benefits under the pension plan are determined under a cash balance formula. Under its retirement savings plan, KMI contributes an amount equal to 5% of participants’ eligible compensation per year. KMI is responsible for benefits accrued under its plans and allocates certain costs based on a benefit allocation rate applied on payroll charged to its affiliates.

Postretirement Benefits Plan

We provide postretirement benefits, including medical benefits for a closed group of retirees. Medical benefits for pre-age 65 participants of this closed group may be subject to deductibles, co-payment provisions, dollar caps and other limitations on the amount of employer costs, and are subject to further benefit changes by KMI, the plan sponsor. Post-age 65 Medicare eligible participants are provided a fixed subsidy to purchase coverage through a retiree Medicare exchange. In addition, certain former employees continue to receive limited postretirement life insurance benefits. Our postretirement benefit plan costs were prefunded and were recoverable under prior rate case settlements. Currently, there is no cost recovery or related funding that is required as part of our current FERC approved rates, however, we can seek to recover any funding shortfall that may be required in the future. We do not expect to make any contributions to our postretirement benefit plan in 2019 and there were no contributions made in 2018 and 2017 or the four months ended December 31, 2016.

Postretirement Benefit Obligation, Plan Assets and Funded Status

Our postretirement benefit obligations and net benefit costs are primarily based on actuarial calculations. We use various assumptions in performing these calculations, including those related to the return that we expect to earn on our plan assets, the estimated cost of health care when benefits are provided under our plan and other factors. A significant assumption we utilize is the discount rates used in calculating the benefit obligations. The discount rate used in the measurement of our postretirement benefit obligation is determined by matching the timing and amount of our expected future benefit payments for our postretirement benefit obligation to the average yields of various high-quality bonds with corresponding maturities. The service and interest cost

13



components of net periodic benefit cost (credit) for our other postretirement benefit plan are estimated by utilizing a full yield curve approach by applying the specific spot rates along the yield curve used in the determination of the benefit obligation to their underlying projected cash flows.

The table below provides information about our postretirement benefit plan as of and for each of the listed periods (in millions):
 
Year Ended December 31,
 
Four Months Ended December 31,
 
2018
 
2017
 
2016
Change in plan assets:
 
 
 
 
 
Fair value of plan assets - beginning of period
$
60
 
 
$
58
 
 
$
57
 
Actual return on plan assets
(2
)
 
5
 
 
2
 
Benefits paid
(3
)
 
(3
)
 
(1
)
Fair value of plan assets - end of period
$
55
 
 
$
60
 
 
$
58
 
Change in postretirement benefit obligation:
 
 
 
 
 
Postretirement benefit obligation - beginning of period
$
27
 
 
$
29
 
 
$
30
 
Interest cost
1
 
 
1
 
 
 
Actuarial gain
(2
)
 
 
 
 
Benefits paid
(3
)
 
(3
)
 
(1
)
Postretirement benefit obligation - end of period
$
23
 
 
$
27
 
 
$
29
 
Reconciliation of funded status:
 
 
 
 
 
Fair value of plan assets
$
55
 
 
$
60
 
 
$
58
 
Less: Postretirement benefit obligation
23
 
 
27
 
 
29
 
Net asset at December 31(a)
$
32
 
 
$
33
 
 
$
29
 
_______________
(a)
Net asset amounts are included in “Deferred charges and other assets” on our accompanying Consolidated Balance Sheets.

Plan Assets

The primary investment objective of our plan is to ensure that, over the long-term life of the plan, an adequate pool of sufficiently liquid assets exists to meet the benefit obligations to retirees and beneficiaries. Investment objectives are long-term in nature covering typical market cycles. Any shortfall of investment performance compared to investment objectives is generally the result of economic and capital market conditions. Although actual allocations vary from time to time from our targeted allocations, the target allocations of our postretirement plan’s assets are 60% equity and 40% fixed income.

Below are the details of the postretirement benefit plan assets by class and a description of the valuation methodologies used for assets measured at fair value.

Level 1 assets' fair values are based on quoted market prices for the instruments in actively traded markets. Included in this are equities and master limited partnerships using the quoted prices in actively traded markets;
Level 2 assets' fair values are primarily based on pricing, data representative of quoted prices for similar assets in active markets (or identical assets in less active markets). Included in this are short term investment funds which are valued at cost plus calculated interest; and
Plan assets with fair values that are based on the net asset value per share, or its equivalent (NAV), as reported by the issuers are determined based on the fair value of the underlying securities as of the valuation date and include private limited partnerships, fixed income trusts and common collective trusts. The plan assets measured at NAV are not categorized within the fair value hierarchy described above, but are separately identified in the table below.

14



Listed below are the fair values of the plan's assets that are recorded at fair value by class and categorized by fair value measurement used at December 31, 2018 and 2017 (in millions):
 
2018
 
2017
 
Level 1
 
Level 2
 
Total
 
Level 1
 
Level 2
 
Total
Short-term investment fund (money market)
$

 
 
$

 
 
$

 
 
$

 
 
$
1

 
 
$
1
 
Equity securities, domestic
 
 
 
 
 
 
 
 
 
5
 
 
 
 
 
 
5
 
Master limited partnerships
 
 
 
 
 
 
 
 
 
14
 
 
 
 
 
 
14
 
Total assets in fair value hierarchy
$

 
 
$

 
 
 
 
 
$
19

 
 
$
1

 
 
20
 
 
 
 
 
 
 
 
 
 
 
 
 
Investments measured at NAV(a)
 
 
 
 
55
 
 
 
 
 
 
 
40
 
Investments at fair value
 
 
 
 
$
55

 
 
 
 
 
 
$
60
 
_______________
(a)
In accordance with Subtopic 820-10 of ASU No. 2015-07, Fair Value Measurement (Topic 820) , certain Plan assets that were measured at NAV per share (or its equivalent) have not been classified in the fair value hierarchy. The fair value of the common collective trusts as of December 31, 2018 was $55 million. The fair value of the fixed income trusts and private limited partnerships as of December 31, 2017 was $18 million and $22 million, respectively.

Expected Payment of Future Benefits

As of December 31, 2018, we expect the following benefit payments under our plan (in millions):
Year
 
Total
2019
 
$
3
 
2020
 
2
 
2021
 
2
 
2022
 
2
 
2023
 
2
 
2024 - 2028
 
9
 

Actuarial Assumptions and Sensitivity Analysis

Postretirement benefit obligations and net benefit costs are based on actuarial estimates and assumptions. The following table details the weighted average actuarial assumptions used in determining our postretirement plan obligations and net benefit costs.
 
2018
 
2017
 
 
(%)
 
Assumptions related to benefit obligations at December 31:
 
 
 
Discount rate
4.14
 
3.45
Assumptions related to benefit costs for the year ended December 31:
 
 
 
Discount rate for benefit obligations
3.45
 
3.63
Discount rate for interest on benefit obligations
3.03
 
2.93
Expected return on plan assets(a)
7.25
 
7.00
_______________
(a)
The expected return on plan assets listed in the table above is a pre-tax rate of return based on our portfolio of investments. We utilize an after-tax expected return on plan assets to determine our benefit costs, which is based on unrelated business income taxes with a weighted average rate of 21% for both 2018 and 2017.

Actuarial estimates for our postretirement benefits plan assumed a weighted average annual rate of increase in the per capita costs of covered health care benefits of 6.12%, gradually decreasing to 4.54% by the year 2038. A one-percentage point change in assumed health care trends would not have had a significant effect on the postretirement benefit obligation or interest costs as of and for the years ended December 31, 2018 and 2017 and the four months ended December 31, 2016.


15



Components of Net Benefit Income

The components of net benefit costs (income) are as follows (in millions):
 
Year Ended December 31,
 
Four Months Ended December 31,
 
2018
 
2017
 
2016
Interest cost(a)
$
1
 
 
$
1
 
 
$
 
Expected return on plan assets
(3
)
 
(3
)
 
(1
)
Amortization of prior service credit(a)
(2
)
 
(2
)
 
 
Net benefit income
$
(4
)
 
$
(4
)
 
$
(1
)
________
(a) Amounts during the four months ended December 31, 2016 were less than $500,000.


6. Related Party Transactions

Affiliate Balances and Activities

We enter into transactions with our affiliates within the ordinary course of business, including natural gas transportation services to and from affiliates under long-term contracts, storage contracts and various operating agreements, and the services are based on the same terms as non-affiliates. As of December 31, 2018 and 2017, we had approximately $1 million of natural gas imbalance payable and approximately $1 million of natural gas imbalance receivable, respectively, with our affiliates which are included in “Other current liabilities” and “Other current assets”, respectively, on our accompanying Consolidated Balance Sheets.

We do not have employees and are operated by an indirect subsidiary of KMI; therefore, KMI employees provide services to us. We have an Operations and Management Agreement (O&M Agreement) with Kinder Morgan SNG Operator, LLC, a subsidiary of KMI, whereby we reimburse KMI monthly for direct operating expenses incurred on our behalf and pay a fixed annual fee for general and administrative costs. The fixed fee for the years ended December 31, 2018 and 2017 and the four months ended December 31, 2016 were $31 million, $30 million and $13 million, respectively, and are reflected in the “General and administrative” line in the table below. The fixed fee will continue to be $31 million for 2019 and 2020, and is subject to review and approval for each of the next four years pursuant to the O&M Agreement.

The following table shows revenues and costs from our affiliates (in millions):
 
Year Ended December 31,
 
Four Months Ended December 31,
 
2018
 
2017
 
2016
Revenues
$
201
 
 
$
200
 
 
$
67
 
Operations and maintenance
104
 
 
90
 
 
24
 
General and administrative
31
 
 
30
 
 
13
 
Capitalized costs
15
 
 
9
 
 
4
 

Subsequent Event

In January 2019, we made a cash distribution to our Members of $20 million and received contributions from our Members of approximately $0.3 million.



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7. Fair Value

The following table reflects the carrying amount and estimated fair value of our outstanding debt balances (in millions):
 
As of December 31,
 
2018
 
2017
 
Carrying
Amount
 
Estimated Fair Value
 
Carrying
Amount
 
Estimated Fair Value
Total debt
$1,103
 
$1,190
 
$1,115
 
$1,302

We separate the fair values of our financial instruments into levels based on our assessment of the availability of observable market data and the significance of non-observable data used to determine the estimated fair value. We estimated the fair values of our outstanding debt balance primarily based on quoted market prices for the same or similar issues, a Level 2 fair value measurement. Our assessment and classification of an instrument within a level can change over time based on the maturity or liquidity of the instrument and this change would be reflected at the end of the period in which the change occurs. During the years ended December 31, 2018 and 2017, there were no changes to the inputs and valuation techniques used to measure fair value, the types of instruments, or the levels in which they were classified.


8. Revenue Recognition

Disaggregation of Revenues

The following table presents our revenues disaggregated by revenue source and type of revenue for each revenue source (in millions):
 
Year Ended
 
December 31, 2018
Revenue from contracts with customers
 
Services
 
Firm services
$
540
 
Fee-based services
67
 
Total services revenue
607
 
Other revenue
(3
)
Total revenues
$
604
 

Contract Balances

Contract assets and contract liabilities are the result of timing differences between revenue recognition, billings and cash collections. We recognize contract assets in those instances where billing occurs subsequent to revenue recognition and our right to invoice the customer is conditioned on something other than the passage of time. We had no contract assets as of January 1, or December 31, 2018. Our contract liabilities are substantially related to (i) contractual billings made to customers in advance of the service being provided, which we substantially recognize as revenue on a straight-line basis over the term of the related customer contracts and (ii) contracts where we have levelized revenue recognition for capacity reservation (take-or-pay) customer charges which are billed at higher reservation rates in the initial contract years, but have equal capacity reservation amounts for the life of such contracts.


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The following table presents the activity in our contract liabilities for the year ended December 31, 2018, all of which is reported within “Other current liabilities” in our accompanying Consolidated Balance Sheets at December 31, 2018 (in millions):
Contract Liabilities
 
Balance at January 1, 2018
 
$
2

Additions
5
 
Transfer to Revenues
(6
)
Balance at December 31, 2018
 
$
1


Revenue Allocated to Remaining Performance Obligations

The following table presents our estimated revenue allocated to remaining performance obligations for contracted revenue that has not yet been recognized, representing our “contractually committed” revenue as of December 31, 2018 that we will invoice or transfer from deferred revenue (contract liabilities) and recognize as revenue in future periods (in millions):
Year
 
Estimated Revenue
2019
 
$
554
 
2020
 
542
 
2021
 
454
 
2022
 
286
 
2023
 
249
 
Thereafter
 
1,469
 
Total
 
$
3,554
 

Our contractually committed revenue, for purposes of the tabular presentation above, is limited to service customer contracts which have fixed pricing and fixed volume terms and conditions, generally including contracts with take-or-pay or minimum volume commitment payment obligations.

Major Customers

For the year ended December 31, 2018, revenues from our largest affiliate customer was approximately $271 million which exceeded 10% of our operating revenues. For the year ended December 31, 2017, revenues from our two largest customers (one affiliate and one third party) were approximately $269 million, and $55 million, each of which exceeded 10% of our operating revenues. For the four months ended December 31, 2016, revenues from our largest affiliate and non-affiliate customers were approximately $89 million, and $52 million, each of which exceeded 10% of our operating revenues for that period, see Note 6.



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9. Accounting for Regulatory Activities

Regulatory Assets and Liabilities

Regulatory assets and liabilities represent probable future revenues or expenses associated with certain charges and credits that will be recovered from or refunded to customers through the ratemaking process. As of December 31, 2018, the regulatory assets are being recovered in our rates, without earning a return, over a period of approximately one year to 31 years. Below are the details of our regulatory assets and liabilities as of (in millions):
 
December 31,
 
2018
 
2017
Current regulatory assets
 
 
 
Difference between gas retained and gas consumed in operations
$
22
 
 
$
1
 
Other
1
 
 
1
 
Total current regulatory assets
23
 
 
2
 
Non-current regulatory assets
 
 
 
Taxes on capitalized funds used during construction
12
 
 
13
 
Unamortized loss on reacquired debt
8
 
 
9
 
Other
2
 
 
1
 
Total non-current regulatory assets
22
 
 
23
 
Total regulatory assets
$
45
 
 
$
25
 
 
 
 
 
Current regulatory liabilities
 
 
 
Difference between gas retained and gas consumed in operations
$
1
 
 
$
12
 
Income tax related (a)
2
 
 
 
Other
2
 
 
3
 
Total current regulatory liabilities
5
 
 
15
 
Non-current regulatory liabilities
 
 
 
Postretirement benefits
13
 
 
19
 
Income tax related (a)
57
 
 
55
 
Other
 
 
1
 
Total non-current regulatory liabilities (b)
70
 
 
75
 
Total regulatory liabilities
$
75
 
 
$
90
 
_______________
(a)    See “2017 Tax Reform” below.
(b)    Included in “Other long-term liabilities and deferred credits” on our accompanying Consolidated Balance Sheets.

Our significant regulatory assets and liabilities include:

Difference between gas retained and gas consumed in operations

Amounts reflect the value of the difference between the gas retained and consumed in our operations. Pursuant to our tariff, these amounts are expected to be recovered from or returned to our customers in subsequent periods.

Taxes on capitalized funds used during construction

Amounts represent the recovery of deferred income taxes on AFUDC Equity recognized during the time prior to 2007 when we were a taxable entity. These amounts are included in our tariff rates and are recovered over the depreciable lives of the asset to which they apply.


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Unamortized loss on reacquired debt

Amounts represent the deferred and unamortized portion of loss on reacquired debt which are recovered in our rates. Amounts are amortized over the original life of the debt issue, or in the case of refinanced debt, over the life of the new debt issue.
    
Postretirement Benefits

Amounts represent unrecognized gains and losses related to our postretirement benefit plan.

2017 Tax Reform

On December 22, 2017, the U.S. enacted the 2017 Tax Reform. Among the many provisions included in the 2017 Tax Reform is a provision to reduce the U.S. federal corporate income tax rate from 35% to 21% effective January 1, 2018. As income taxes are a component in our maximum recourse rates, the income tax rate change resulted in us recording a $66 million non-cash charge to our earnings related to an adjustment to our deferred income tax related regulatory assets and  liabilities. The charge was recorded as a reduction to Revenues of $55 million and an increase to Other, net of $11 million for the year ended December 31, 2017 and in 2018, we recorded a true-up adjustment which resulted in a reduction to Revenues of $5 million on our accompanying Consolidated Statements of Income.

Regulatory Matters

Rate Case

On July 12, 2013, the FERC approved a comprehensive rate case settlement for SNG's general system-wide tariff rates. Under the settlement, we were required to file a new rate case no later than February 28, 2018 for new storage and transportation tariff rates to go into effect September 1, 2018. In August 2017, we commenced pre-filing settlement negotiations with our customers to try and resolve the rate proceeding prior to filing a rate case with FERC. We filed on January 29, 2018 a request to FERC to extend the obligation to file the rate case from February 28 to May 1, 2018 in order to continue negotiations of a pre-filing settlement.  The FERC approved this filing on February 16, 2018. We filed a pre-filing settlement on March 12, 2018. The FERC approved the pre-filing settlement on May 30, 2018. New transportation, storage and park and loan tariff rates went into effect September 1, 2018, reflecting a 1% decrease in transportation and storage tariff rates. The settlement agreement and the resulting rates take into consideration the effects of the 2017 Tax Reform

During 2018, the FERC issued the following policy and order related to income taxes:
    
Revised Policy Statement on Treatment of Income Taxes (Revised Tax Policy).

In Docket No. PL17-1-000, as clarified under FERC’s Order on Rehearing, the FERC issued a revised policy statement to address income tax and rate of return policies for Master Limited Partnerships (MLPs) as a result of the decisions of the U.S. Court of Appeals for the District of Columbia Circuit in United Airlines, Inc., et al. v. FERC (United Airlines). The Revised Tax Policy provides a general policy statement notifying that an impermissible double recovery results from granting an MLP pipeline both an income tax allowance and a return on equity under the discounted cash flow methodology. The FERC clarified that each MLP pipeline may still propose an income tax allowance in a rate filing because the Revised Tax Policy is not a binding rule. If an MLP or other pass-through pipeline eliminates its income tax allowance from its cost of service pursuant to the post-United Airlines policy, the FERC anticipates that accumulated deferred income taxes (ADIT) will similarly be removed from the cost of service. With respect to other pass-through entities, the Revised Tax Policy recognized that the record in that proceeding did not provide a basis for addressing the United Airlines double recovery issue for the innumerable forms of pass-through entities. As a result, the Revised Tax Policy noted that non-MLP pass-through entities may recover an income tax allowance if they are able to prove in future proceedings that there is no double recovery. The FERC will require other partnerships and pass-through entities seeking to recover an income tax allowance to address the double-recovery concern from United Airlines in subsequent proceedings. The ultimate owners of our Members are organized as C-corporations and our earnings are taxed at the owner level. As such, we do not believe that the Revised Tax Policy will have an effect on our ability to collect an income tax allowance in our rates.

I nterstate and Intrastate Natural Gas Pipelines; Rate Changes Relating to Federal Income Tax Rate – (Order No.
849).

In Order No. 849, issued July 18, 2018, (Docket No. RM18-11) (Final Rule), the FERC required interstate pipelines to file an informational filing on a new Form No. 501-G to collect information to evaluate the impact of the 2017 Tax Reform and the Revised Tax Policy regarding tax allowances for interstate and intrastate natural gas pipelines. On August 17, 2018, we and certain

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KMI affiliates and other unrelated parties jointly filed a request for rehearing of the Final Rule. The FERC issued an order granting rehearing for further consideration on September 17, 2018. Based on the Final Rule our filing would have been due on December 6, 2018; however, we filed with the FERC for a waiver of filing the Form No. 501-G. This filing was approved on October 29, 2018, and we are not required to file a Form No. 501-G.

Other

We applied with the FERC on February 3, 2017 in Docket No. CP17-46-000 to expand our system in Georgia (Fairburn Expansion project) to provide additional firm transportation capacity of approximately 370,000 dekatherms per day in the Southeast market. The FERC issued an order on February 15, 2018, approving this expansion. The estimated capital cost of the project is approximately $244 million and it was placed into service in December, 2018. Included in the capital cost is $142 million for the purchase of a lateral previously owned by Georgia Power.  We are obligated to pay for the lateral in January of 2020.

10. Litigation, Environmental and Commitments

Legal Matters

We are party to various legal, regulatory and other matters arising from the day-to-day operations of our businesses that may result in claims against the Company. Although no assurance can be given, we believe, based on our experiences to date and taking into account established reserves, that the ultimate resolution of such items will not have a material adverse impact on our business, financial position, results of operations or cash flows. We believe we have meritorious defenses to the matters to which we are a party and intend to vigorously defend the Company. When we determine a loss is probable of occurring and is reasonably estimable, we accrue an undiscounted liability for such contingencies based on our best estimate using information available at that time. If the estimated loss is a range of potential outcomes and there is no better estimate within the range, we accrue the amount at the low end of the range. We disclose contingencies where an adverse outcome may be material, or in the judgment of management, we conclude the matter should otherwise be disclosed.

General

As of December 31, 2018 and 2017 we had no accruals for our outstanding legal proceedings.
    
Environmental Matters

We are subject to environmental cleanup and enforcement actions from time to time. In particular, the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) generally imposes joint and several liability for cleanup and enforcement costs on current and predecessor owners and operators of a site, among others, without regard to fault or the legality of the original conduct, subject to the right of a liable party to establish a “reasonable basis” for apportionment of costs. Our operations are also subject to federal, state and local laws and regulations relating to protection of the environment. Although we believe our operations are in substantial compliance with applicable environmental laws and regulations, risks of additional costs and liabilities are inherent in our operations, and there can be no assurance that we will not incur significant costs and liabilities. Moreover, it is possible that other developments, such as increasingly stringent environmental laws, regulations and enforcement policies under the terms of authority of those laws, and claims for damages to property or persons resulting from our operations, could result in substantial costs and liabilities to us.
    
Vintage Assets, Inc. Coastal Erosion Litigation

On December 18, 2015, Vintage Assets, Inc. and several individual landowners filed a petition in the State District Court for Plaquemines Parish, Louisiana alleging that its 5,000 acre property is composed of coastal wetlands, and that we failed to maintain pipeline canals and banks, causing widening of the canals, land loss, and damage to the ecology and hydrology of the marsh, in breach of right of way agreements, prudent operating practices, and Louisiana law. The suit also claims that defendants’ alleged failure to maintain pipeline canals and banks constitutes negligence and has resulted in encroachment of the canals, constituting trespass. The suit seeks in excess of $80 million in money damages, including recovery of litigation costs, damages for trespass, and money damages associated with an alleged loss of natural resources and projected reconstruction cost of replacing or restoring wetlands. The suit was removed to the U.S. District Court for the Eastern District of Louisiana. Our assets at issue were sold to Highpoint Gas Transmission, LLC in 2011, which was subsequently purchased by American Midstream Partners, LP. In response to our demand for defense and indemnity, American Midstream Partners agreed to pay 50% of joint defense costs and expenses, with a percentage of indemnity to be determined upon final resolution of the suit. On October 20, 2016, plaintiffs filed an amended complaint naming Highpoint Gas Transmission, LLC as an additional defendant. A non-jury trial was held during September 2017. On May 4, 2018, the District Court entered a judgment dismissing the tort and negligence claims against all of the defendants,

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and dismissing certain of the contract claims against one of our co-defendants.  In ruling in favor of plaintiffs on the remaining contract claims, the District Court ordered us to pay up to $1,104 in money damages, and issued a permanent injunction ordering us to restore up to 2.94 acres of land and maintain certain canals at widths designated by the right of way agreements in effect.  The Court stayed the judgment and the injunction pending appeal. The parties each filed a separate appeal to the U.S. Court of Appeals for the Fifth Circuit. On September 13, 2018, Highpoint Gas Transmission, LLC filed a motion to vacate the judgment and dismiss all of the appeals for lack of subject matter jurisdiction. On October 2, 2018, the Court of Appeals dismissed the appeals and remanded the suit to the U.S. District Court for the Eastern District of Louisiana. In doing so, the Court of Appeals ordered the District Court to remand the suit to the State District Court of Plaquemines Parish, Louisiana for further proceedings. The District Court has not yet done so. We will continue to vigorously defend the suit.

General

Although it is not possible to predict the ultimate outcomes, we believe that the resolution of the environmental matters set forth in this note, and other matters to which we and our subsidiary are a party, will not have a material adverse effect on our business, financial position, results of operations or cash flows. As of December 31, 2018 and 2017, we had less than $1 million accrued for our environmental matters.

Commitments

Capital Commitments

As of December 31, 2018, we have capital commitments of $4 million, which we expect to spend during 2019. We have other planned capital and investment projects that are discretionary in nature, with no substantial contractual capital commitments made in advance of the actual expenditures.

Transportation Commitments

We have transportation commitments totaling $290 million as of December 31, 2018, which are primarily related to a transportation contract with our affiliate, Elba Express Company, L.L.C., which we expect to spend $25 million each year for the period from 2019 to 2023 and $165 million in total thereafter. Transportation expense with Elba Express for the years ended December 31, 2018 and 2017 and the four months ended December 31, 2016 was approximately $25 million, $24 million and $2 million, and is reflected in “Operations and maintenance” on our accompanying Consolidated Statements of Income.

Storage Commitments

We have storage capacity commitments totaling $9 million as of December 31, 2018, most of which are related to storage capacity contracts with our equity investee, Bear Creek, which we expect to spend during 2019. We expect annual renewal of this contract to occur into the foreseeable future. Storage expense with Bear Creek for the years ended December 31, 2018 and 2017 and the four months ended December 31, 2016 was approximately $13 million, $13 million and $4 million, and is reflected in “Operations and maintenance” on our accompanying Consolidated Statements of Income.

Operating Leases

We lease property, facilities and equipment under various operating leases. Our future minimum annual rental commitments under our operating leases as of December 31, 2018, are as follows (in millions):
Year
 
Total
2019
 
$
2
 
2020
 
2
 
2021
 
2
 
2022
 
2
 
2023
 
2
 
Thereafter
 
10
 
Total
 
$
20
 

Rent expense on our lease obligations for the years ended December 31, 2018 and 2017 and the four months ended December

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31, 2016 was approximately $2 million, $2 million and $1 million, and is reflected in “Operations and maintenance” and “General and administrative” on our accompanying Consolidated Statements of Income. For certain operating leases related to shared facilities, we may be the primary obligor, but the rent expense is allocated to various KMI subsidiaries and is administered and funded by KMI.


11. Recent Accounting Pronouncements

Topic 842

On February 25, 2016, the FASB issued ASU No. 2016-02, “Leases” followed by a series of related accounting standard updates (collectively referred to as “Topic 842”). Topic 842 establishes a new lease accounting model for leases. The most significant changes include the clarification of the definition of a lease, the requirement for lessees to recognize for all leases a right-of-use asset and a lease liability in the consolidated balance sheet, and additional quantitative and qualitative disclosures which are designed to give financial statement users information on the amount, timing, and uncertainty of cash flows arising from leases. Expenses are recognized in the consolidated statement of income in a manner similar to current accounting guidance. Lessor accounting under the new standard is substantially unchanged. The new standard will become effective for us beginning with the first quarter 2019. We will adopt the accounting standard using a prospective transition approach, which applies the provisions of the new guidance at the effective date without adjusting the comparative periods presented. We have elected the package of practical expedients permitted under the transition guidance within the new standard, which among other things, allows us to carry forward the historical accounting relating to lease identification and classification for existing leases upon adoption. We have also elected the optional practical expedient permitted under the transition guidance within the new standard related to land easements that allows us to carry forward our historical accounting treatment for land easements on existing agreements upon adoption. We have made an accounting policy election to keep leases with an initial term of 12 months or less off of the consolidated balance sheet. We are finalizing our evaluation of the impacts that the adoption of this accounting guidance will have on the consolidated financial statements, and estimate approximately $17 million of additional right-of-use assets and liabilities will be recognized in our balance sheet upon adoption.


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