Exhibit 4.49

TENTH SUPPLEMENTAL INDENTURE TO FIRST MORTGAGE AND DEED OF TRUST

ITC MIDWEST LLC

TO

THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., as successor to THE BANK OF NEW YORK TRUST COMPANY, N.A.

Trustee

Dated as of September 28, 2018

Supplementing the First Mortgage and Deed of Trust dated as of January 14, 2008, as heretofore supplemented

From ITC MIDWEST LLC to THE BANK OF NEW YORK TRUST COMPANY, N.A., Trustee

THIS INSTRUMENT CONTAINS AFTER-ACQUIRED PROPERTY PROVISIONS

Establishing a series of Securities designated 4.32% First Mortgage Bonds, Series I due 2051

This agreement secures future advances as more fully set forth in Section 6.10 hereof.

This document secures an additional debt amount of $6,970,497. Tax in the amount of $3,956 was paid on the debt amount of $1,720,000 in Le Sueur County, Minnesota, document number 353162 recorded January 16, 2008. Tax in the amount of $14,950 was paid on the debt amount of $6,500,000 in Le Sueur County, Minnesota, document number 378017 recorded December 14, 2011.  Tax in the amount of $15,594 was paid on the debt amount of $6,780,000 in Le Sueur County, Minnesota, document number 386706 recorded March 25, 2013.  Tax in the amount of $11,260.65 was paid on the debt amount of $4,895,933 in Le Sueur County, Minnesota, document number 409040 recorded March 20, 2017. Notwithstanding anything in the contrary contained herein, enforcement of the mortgage that is amended hereby in Minnesota is limited to a debt amount of $26,866,430.00 under chapter 287 of Minnesota Statutes.

TABLE OF CONTENTS

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TENTH SUPPLEMENTAL INDENTURE (this “TENTH SUPPLEMENTAL INDENTURE”), dated as of September, 28 2018, between ITC MIDWEST LLC, a limited liability company organized and existing under the laws of the State of Michigan (herein called the “Company”), having its principal office at 27175 Energy Way, Novi, Michigan  48377, and THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A. (as successor to The Bank of New York Trust Company, N.A.), a national banking association organized under the laws of the United States, as trustee (herein called the “Trustee”), the office of the Trustee at which on the date hereof its corporate trust business is principally administered being 2 N. LaSalle, Suite 700, Chicago, Illinois 60602.

RECITALS OF THE COMPANY

WHEREAS, the Company has heretofore executed and delivered to the Trustee a First Mortgage and Deed of Trust dated as of January 14, 2008 (the “Mortgage Indenture”), encumbering the real property interests as more particularly described on Exhibit A attached to the Mortgage Indenture and providing for the issuance by the Company from time to time of its bonds, notes or other evidences of indebtedness (in the Mortgage Indenture and herein called the “Securities”) to be issued in one or more series and to provide security for the payment of the principal of and premium, if any, and interest, if any, on the Securities; and

WHEREAS, the Company has heretofore executed and delivered the following supplemental indentures, each dated as hereinafter set forth:

WHEREAS, the Mortgage Indenture, the First Supplemental Indenture, the Second Supplemental Indenture, the Third Supplemental Indenture, the Fourth Supplemental Indenture, the Fifth Supplemental Indenture, the Sixth Supplemental Indenture, the Seventh Supplemental Indenture, the Eighth Supplemental Indenture and the Ninth Supplemental Indenture listed in the foregoing paragraph were recorded in the offices set forth in Schedule 1 attached hereto; and

WHEREAS, there have heretofore been issued under the Indenture the following Securities in the principal amounts as follows:

WHEREAS, The Bank of New York Trust Company, N.A., became The Bank of New York Mellon Trust Company, N.A., a national banking association, pursuant to a name change, and approved by the Comptroller of Currency, effective July 1, 2008; and

WHEREAS, in addition to the property described in the Mortgage Indenture, the Company has acquired certain other property, rights, and interests in property; and

WHEREAS, the Company, in the exercise of the power and authority conferred upon and reserved to it under the provisions of the Mortgage Indenture and pursuant to appropriate resolutions of the Board of Directors, has duly determined to make, execute and deliver to the Trustee this Tenth Supplemental Indenture to the Mortgage Indenture as permitted by Sections 2.01, 3.01, 4.01, 4.02 and 14.01 of the Mortgage Indenture in order to establish the form and terms of, and to provide for the creation and issuance of, a series of Securities under the Mortgage Indenture in an aggregate principal amount of $175,000,000 and to amend and supplement the Mortgage Indenture as herein provided; and

WHEREAS, all things necessary to make the Bonds (as defined herein), when executed by the Company and authenticated and delivered by the Trustee or any Authenticating Agent and issued upon the terms and subject to the conditions hereinafter and in the Mortgage Indenture set forth against payment therefor the valid, binding and legal obligations of the Company and to make this Tenth Supplemental Indenture a valid, binding and legal agreement of the Company, have been done;

NOTICE TO IOWA RESIDENTS: This Tenth Supplemental Indenture secures credit in the amount of ONE HUNDRED SEVENTY-FIVE MILLION DOLLARS ($175,000,000) together with the amount of all prior advances pursuant to Securities issuances heretofore made pursuant to the Mortgage Indenture, the First Supplemental Indenture, the Second Supplemental Indenture, the Third

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Supplemental Indenture, the Fourth Supplemental Indenture, the Fifth Supplemental Indenture, the Sixth Supplemental Indenture, the Seventh Supplemental Indenture, the Eighth Supplemental Indenture and the Ninth Supplemental Indenture for a total combined amount advanced of ONE BILLION EIGHTY-FIVE MILLION DOLLARS ($1,085,000,000). Loans and advances up to this amount, together with interest, are senior to indebtedness to other creditors under subsequently recorded or filed mortgages and liens.

GRANTING CLAUSES

NOW, THEREFORE, THIS TENTH SUPPLEMENTAL INDENTURE WITNESSETH that, in order to establish the terms of a series of Securities, and for and in consideration of the premises and of the covenants contained in the Mortgage Indenture and in this Tenth Supplemental Indenture and for other good and valuable consideration the receipt and sufficiency of which are hereby acknowledged, and in order to secure the payment of the principal of and premium, if any, and interest, if any, on, and all other amounts (including, without limitation, fees, expenses and indemnities) in connection with, all Securities from time to time Outstanding and the performance of the covenants therein and herein contained and to declare the terms and conditions on which such Securities are secured, the Company has granted, bargained, sold, conveyed, assigned, transferred mortgaged, pledged, set over and confirmed and hereby grants, bargains, sells, conveys, assigns, transfers, mortgages, pledges, sets over and confirms to the Trustee, and has granted and hereby grants to the Trustee, for itself and for the benefit of the Holders, with power of sale, a lien upon and a security interest in, the following (subject, however, to the terms and conditions set forth in the Mortgage Indenture and herein):

GRANTING CLAUSE FIRST

All right, title and interest of the Company, as of the date of the execution and delivery of this Tenth Supplemental Indenture, as originally executed and delivered, in and to all property, real, personal and mixed, located in the States of Illinois, Iowa, Minnesota and Missouri, or wherever else situated (other than Excepted Property), including without limitation all right, title and interest of the Company in and to the following property and interests so located (other than Excepted Property):

(a)                                  all real property owned in fee, easements, easement estates and other interests in real property which are specifically described or referred to in Exhibit A attached to the Mortgage Indenture, Exhibit A attached to the First Supplemental Indenture, Exhibit A attached to the Second Supplemental Indenture, Exhibit A attached to the Third Supplemental Indenture, Exhibit A attached to the Fourth Supplemental Indenture, Exhibit A attached to the Fifth Supplemental Indenture,  Exhibit A attached to the Sixth Supplemental Indenture, Exhibit A attached to the Seventh Supplemental Indenture, Exhibit A attached to the Eighth Supplemental Indenture, Exhibit A attached to the Ninth Supplemental Indenture and Exhibit A attached hereto;

(b)                                  all licenses, permits to use the real property of others, franchises to use public roads, streets and other public properties, rights of way and other rights or interests relating to the occupancy or use of real property;

(c)                                   all facilities, machinery, equipment and fixtures for the transmission and distribution of electric energy including, but not limited to, all plants, air and water pollution control and sewage and solid waste disposal facilities, switchyards, towers, substations, transformers, poles, lines, cables, conduits, ducts, conductors, meters, regulators and all other property used or to be used for any or all of such purposes;

(d)                                  all buildings, offices, warehouses, structures or improvements in addition to those referred to or otherwise included in clauses (a) and (c) above;

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(e)                                   all computers, data processing, data storage, data transmission and/or telecommunications facilities, equipment and apparatus necessary for the operation or maintenance of any facilities, machinery, equipment or fixtures described or referred to in clause (c) above;

(f)                                    all of the foregoing property in the process of construction; and

(g)                                   (except as hereinbefore or hereinafter expressly excepted) all the right, title and interest of the Company in and to all other property of any kind or nature appertaining to and/or used and/or occupied and/or enjoyed in connection with any property hereinbefore described;

GRANTING CLAUSE SECOND

Subject to the applicable exceptions permitted by Sections 8.10(d), 13.03 and 13.05 of the Mortgage Indenture, all right, title and interest of the Company in all property of every kind and description and wheresoever situated, real, personal and mixed (other than Excepted Property) which may be hereafter acquired by the Company, it being the intention of the Company that all such property acquired by the Company after the date of the execution and delivery of this Tenth Supplemental Indenture, as originally executed and delivered, shall be as fully embraced within and subjected to the Lien of the Indenture as if such property were owned by the Company as of the date of the execution and delivery of this Tenth Supplemental Indenture, as originally executed and delivered;

GRANTING CLAUSE THIRD

Any Excepted Property, which may, from time to time after the date of the execution and delivery of this Tenth Supplemental Indenture, as originally executed and delivered, by delivery or by an instrument supplemental to the Indenture, be subjected to the Lien of the Indenture by the Company, the Trustee being hereby authorized to receive the same at any time as additional security hereunder; it being understood that any such subjection to the Lien of the Indenture of any Excepted Property as additional security may be made subject to such reservations, limitations or conditions respecting the use and disposition of such property or the proceeds thereof as shall be set forth in such instrument; and

GRANTING CLAUSE FOURTH

All tenements, hereditaments, servitudes and appurtenances belonging or in any wise appertaining to the aforesaid property, with the reversions and remainders thereof;

EXCEPTED PROPERTY

Expressly excepting and excluding, however, from the Lien of the Indenture all right, title and interest of the Company in and to all Excepted Property, whether now owned or hereafter acquired;

TO HAVE AND TO HOLD all such property, unto the Trustee, its successors in trust and their assigns forever;

SUBJECT, HOWEVER, to (a) Liens existing at the date of the execution and delivery of the Mortgage Indenture, as originally executed and delivered, which Liens do not in the aggregate materially and adversely impair the use of the Mortgaged Property in the operation of the business of the Company, or materially and adversely affect the security afforded by the Indenture, (b) as to property acquired by the Company after the date of the execution and delivery of the Mortgage Indenture, as originally executed and delivered, Liens existing or placed thereon at the time of the acquisition thereof (including, but not limited to, Purchase Money Liens), and (c) Permitted Liens;

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IN TRUST, for the equal and ratable benefit and security of the Holders from time to time of all Outstanding Securities without any priority of any such Security over any other such Security;

PROVIDED, HOWEVER , that the right, title and interest of the Trustee in and to the Mortgaged Property shall cease, terminate and become void in accordance with, and subject to the conditions set forth in, Article IX of the Mortgage Indenture, and if, thereafter, the principal of and premium, if any, and interest, if any, on, and any other amounts (including, without limitation, fees, expenses and indemnities) in connection with, the Securities shall have been paid to the Holders thereof, or shall have been paid to the Company pursuant to Section 6.03 of the Mortgage Indenture, then and in that case the Indenture shall terminate, and the Trustee shall execute and deliver to the Company such instruments as the Company shall require to evidence such termination; otherwise the Indenture, and the estate and rights hereby granted, shall be and remain in full force and effect;

IT IS HEREBY COVENANTED AND AGREED by and between the Company and the Trustee that all the Securities are to be authenticated and delivered, and that the Mortgaged Property is to be held, subject to the further covenants, conditions and trusts set forth in the Indenture; and

THE PARTIES HEREBY COVENANT AND AGREE as follows:

ARTICLE ONE

DEFINITIONS AND OTHER PROVISIONS
OF GENERAL APPLICATION

(a)                                  Mortgage Indenture Definitions .  Each capitalized term that is used herein and is defined in the Mortgage Indenture shall have the meaning specified in the Mortgage Indenture unless such term is otherwise defined herein;  provided, however , that any reference to a “Section” or “Article” refers to a Section or Article, as the case may be, of this Tenth Supplemental Indenture, unless otherwise expressly stated.

(b)                                  Additional Definitions .  For purposes of this Tenth Supplemental Indenture, except as otherwise expressly provided or unless the context otherwise requires, the following capitalized terms shall have the meanings set forth below:

“Bond” has the meaning assigned to that term in Section 2.01(a) hereof.

“Bondholders” means (a) the Initial Bondholders and (b) each subsequent holder of a Bond as shown on the register maintained by the Company pursuant to Section 3.05 of the Indenture.

“Capital Stock” means, with respect to any Person, any and all shares, interests, participations or other equivalents (however designated, whether voting or non-voting) in the equity of such Person, including, without limitation, all partnership interests, limited liability company membership or other interests, common stock, preferred stock and beneficial interests in a trust and any and all warrants, rights or options to purchase any of the foregoing.

“Capital Lease” means a lease with respect to which the lessee is required concurrently to recognize the acquisition of an asset and the incurrence of a liability in accordance with GAAP as in effect on the Closing Date.

“Capital Lease Obligation” means, with respect to any Person and a Capital Lease, the amount of the obligation of such Person as the lessee under such Capital Lease which would, in

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accordance with GAAP as in effect on the Closing Date, appear as a liability on a balance sheet of such Person.

“Closing Date” has the meaning assigned to that term in Schedule B to the Purchase Agreement.

“Change in Ownership” means and shall be deemed to have occurred if Holdco ceases to own, directly or indirectly, 85% of the Capital Stock of the Company.

“Debt” means, without duplication, with respect to any Person, the sum of (a) liabilities for borrowed money, (b) liabilities (excluding accounts payable and other accrued liabilities arising in the ordinary course of business) for the deferred purchase price of property and conditional sale or title retention agreements, (c) Capital Lease Obligations, (d) liabilities for borrowed money secured by a Lien on property, (e) reimbursement obligations (contingent or otherwise) in respect of letters of credit, performance bonds or bankers’ acceptances, (f) obligations under any Hedging Agreements, (g) liabilities for Synthetic Leases, (h) obligations evidenced by bonds, debentures, notes or similar instruments and (i) any guarantee with respect to liabilities in clauses (a) through (h) above. All references to the principal amount of Debt outstanding at any time shall be understood to include not only the principal amount of any liabilities for borrowed money or of any bonds, debentures, notes or similar instruments, but also obligations (including those related to reimbursement obligations in respect of letters of credit, but excluding those in respect of interest, fees and other similar amounts) under all other types of Debt described in this definition.

“Default” means the occurrence and continuance of an event, which, with the giving of notice or lapse of time, or both, would constitute an Event of Default.

“Disposition” means a sale, lease, transfer or other disposition of any assets of the Company.

“Environmental Laws” means any and all federal, state, local, and foreign statutes, laws, regulations, ordinances, rules, judgments, orders, decrees, permits, licenses or legally enforceable governmental restrictions relating to pollution and the protection of the environment or the release of any Hazardous Materials into the environment.

“Event of Default” has the meaning assigned to that term in Article Four of this Tenth Supplemental Indenture.

“FERC” means the United States Federal Energy Regulatory Commission.

“Financing Agreements” means the Indenture, including this Tenth Supplemental Indenture, the Purchase Agreement and the Bonds.

“Hazardous Materials” means any and all pollutants, toxic or hazardous wastes or other substances that could reasonably be expected to pose a hazard to health and safety, the removal of which could reasonably be expected to be required or the generation, manufacture, refining, production, processing, treatment, storage, handling, transportation, transfer, use, disposal, release, discharge, spillage, seepage or filtration of which is restricted, prohibited or penalized by any applicable law including, but not limited to, asbestos, urea formaldehyde foam insulation, polychlorinated biphenyls, petroleum, petroleum products, lead based paint, radon gas or similar restricted, prohibited or penalized substances.

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“Hedging Agreements” means all interest rate swaps, caps or collar agreements or similar arrangements dealing with interest rates or currency exchange rates or the exchange of nominal interest obligations, either generally or under specific contingencies.

“Holdco” means ITC Holdings Corp., a Michigan corporation.

“Indenture” means the Mortgage Indenture, as supplemented and modified by any and all indentures supplemental thereto, including this Tenth Supplemental Indenture.

“Initial Bondholder” means each Bondholder listed on Schedule A to the Purchase Agreement purchasing any Bonds on the Closing Date.

“Institutional Investor” means (a) any Initial Bondholder, (b) any holder of more than $5,000,000 of the aggregate principal amount of the Bonds and (c) any bank, trust company, other financial institution, pension plan, investment company, insurance company, or similar financial institution.

“Investment” or “Invest” means (a) a purchase or acquisition of, or an investment or reinvestment in, Rate Base Assets or (b) without duplication, the making of a firm, good faith contractual commitment, in the ordinary course of business and not subject to any conditions in the Company’s control, to purchase or acquire, or invest or reinvest in, Rate Base Assets.

“Law” means any federal, state, local (including municipal) or other statute, law, rule, regulation, ordinance, order, code, policy or rule of common law, now or hereafter in effect, and any judicial or administrative interpretation thereof by a Governmental Authority or otherwise (including any judicial or administrative order, consent decree or judgment to which the Company is a party).

“Make-Whole Amount” means, with respect to any Bond, an amount, as determined by the Company, equal to the excess, if any, of the Discounted Value of the Remaining Scheduled Payments with respect to the Called Principal of such Bond over the amount of such Called Principal; provided that the Make-Whole Amount may in no event be less than zero.  For the purposes of determining any Make-Whole Amount, the following terms have the following meanings:

“Called Principal” means, with respect to any Bond, the principal of such Bond that is to be redeemed pursuant to Section 2.03 or Section 2.04 hereof or has become or is declared to be immediately due and payable pursuant to Section 10.02 of the Indenture, as the context requires.

“Discounted Value” means, with respect to the Called Principal of any Bond, the amount obtained by discounting all Remaining Scheduled Payments with respect to such Called Principal from their respective scheduled due dates to the Settlement Date with respect to such Called Principal, in accordance with accepted financial practice and at a discount factor (applied on the same periodic basis as that on which interest on the Bonds is payable) equal to the Reinvestment Yield with respect to such Called Principal.

“Reinvestment Yield” means, with respect to the Called Principal of any Bond, 0.50% over the yield to maturity implied by (i) the yields reported, as of 10:00 a.m. (New York City time) on the second Business Day preceding the Settlement Date with respect to such Called Principal, on the display designated as “Page PX1” on the Bloomberg Financial Markets Services Screen (or such other

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display as may replace Page PX1 on the Bloomberg Financial Markets Services Screen) for the most recently issued actively traded on the run U.S. Treasury securities having a maturity equal to the Remaining Average Life of such Called Principal as of such Settlement Date, or (ii) if such yields are not reported as of such time or the yields reported as of such time are not ascertainable (including by way of interpolation), the Treasury Constant Maturity Series Yields reported, for the latest day for which such yields have been so reported as of the second Business Day preceding the Settlement Date with respect to such Called Principal, in Federal Reserve Statistical Release H.15 (or any comparable successor publication) for actively traded on the run U.S. Treasury securities having a constant maturity equal to the Remaining Average Life of such Called Principal as of such Settlement Date.  In the case of each determination under clause (i) or clause (ii), as the case may be, of the preceding sentence, such implied yield will be determined, if necessary, by (a) converting U.S. Treasury bill quotations to bond-equivalent yields in accordance with accepted financial practice and (b) interpolating linearly between (1) the applicable actively traded on the run U.S. Treasury security with the maturity closest to and greater than such Remaining Average Life and (2) the applicable actively traded on the run U.S. Treasury security with the maturity closest to and less than such Remaining Average Life.  The Reinvestment Yield shall be rounded to the number of decimal places as appears in the interest rate of the applicable Bond.

“Remaining Average Life” means, with respect to any Called Principal, the number of years (calculated to the nearest one-twelfth year) obtained by dividing (i) such Called Principal into (ii) the sum of the products obtained by multiplying (a) the principal component of each Remaining Scheduled Payment with respect to such Called Principal by (b) the number of years (calculated to the nearest one-twelfth year) that will elapse between the Settlement Date with respect to such Called Principal and the scheduled due date of such Remaining Scheduled Payment.

“Remaining Scheduled Payments” means, with respect to the Called Principal of any Bond, all payments of such Called Principal and interest thereon that would be due after the Settlement Date with respect to such Called Principal if no payment of such Called Principal were made prior to its scheduled due date; provided that if such Settlement Date is not a date on which interest payments are due to be made under the terms of the Bonds, then the amount of the next succeeding scheduled interest payment will be reduced by the amount of interest accrued to such Settlement Date and required to be paid on such Settlement Date pursuant to Section 2.03 or Section 2.04  hereof or Section 10.02 of the Indenture.

“Settlement Date” means, with respect to the Called Principal of any Bond, the date on which such Called Principal is to be redeemed pursuant to Section 2.03 or Section 2.04  hereof or has become or is declared to be immediately due and payable pursuant to Section 10.02 of the Indenture, as the context requires.

“Material” means material in relation to the business, operations, affairs, financial condition, assets or properties of the Company.

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“Material Adverse Effect” means a material adverse effect on (a) the business, operations, affairs, financial condition, assets or properties of the Company, (b) the ability of the Company to perform its obligations under any Financing Agreement (including, the timely payments of principal of, or Make-Whole Amount, if any, and interest on, the Bonds), (c) the legality, validity or enforceability of the Financing Agreements or (d) the perfection or priority of the Liens purported to be created pursuant to the Indenture or the rights and remedies of the Bondholders with respect thereto.

“MISO” means the Midcontinent Independent System Operator, Inc. (formerly known as the Midwest Independent Transmission System Operator, Inc.).

“Mortgage Indenture” has the meaning assigned to that term in the first Recital.

“Net Proceeds” means, with respect to any Disposition of assets, the gross proceeds thereof (including any such proceeds received by way of deferred payment, installment, price adjustment or otherwise), whether in cash or otherwise, net of any taxes paid or reasonably estimated to be paid as a result thereof (after taking into account any available tax credits or deductions applicable thereto).

“OATT” means, at any given time, the open access transmission tariff of MISO that is applicable to the Company, approved by the FERC and then in effect.

“Property” means any right or interest in or to assets or property of any kind whatsoever, whether real, personal or mixed and whether tangible or intangible .

“Purchase Agreement” means that certain Bond Purchase Agreement, to be dated as of or about November 1, 2018, between the Company and the Initial Bondholders.

“Rate Base Assets” means assets of the Company which are included in the FERC’s determination of the Company’s revenue requirement under the OATT .

“Responsible Officer”, when used with respect to the Company, means any Senior Financial Officer or any vice president of the Company or Holdco and any other officer of the Company or Holdco with responsibility for the administration of the relevant Financing Agreement, or portion thereof.

“Revolving Credit Agreement” means the Company’s $225,000,000 Revolving Credit Agreement dated as of October 23, 2017.

“Senior Financial Officer” means the chief financial officer, principal accounting officer, treasurer, comptroller or any vice president of Holdco.

“Senior Secured Debt” means (i) the Bonds, (ii) the 6.150% First Mortgage Bonds, Series A due 2038 issued pursuant to the Indenture, (iii) the 7.27% First Mortgage Bonds, Series C due 2020 issued pursuant to the Indenture, (iv) the 4.60% First Mortgage Bonds, Series D due 2024 issued pursuant to the Indenture, (v) the 3.50% First Mortgage Bonds, Series E due 2027 issued pursuant to the Indenture, (vi) the 4.09% First Mortgage Bonds, Series F due 2043 issued pursuant to the Indenture, (vii) the 3.83% First Mortgage Bonds, Series G due 2055, (viii) the 4.16% First Mortgage Bonds, Series H due 2047 and (ix) other Securities Outstanding issued pursuant to the Indenture.

“Subordinated Debt” means unsecured Debt of the Company fully subordinated in right of payment to the Bonds and other Senior Secured Debt substantially on the terms set forth in Exhibit B attached hereto.

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“Synthetic Leases” means any synthetic lease, tax retention operating lease, off-balance sheet loan or similar off-balance sheet financing product, where such transaction is considered debt for borrowed money for tax purposes but is classified as an operating lease in accordance with GAAP.

“Tenth Supplemental Indenture” has the meaning assigned to that term in the introductory paragraph hereof.

“Total Secured Amount” shall have the meaning assigned to that term in Section 6.10(a) hereof.

“Transmission Documents” shall have the meaning assigned to such term in the Purchase Agreement.

“Transmission System” means the transmission lines and towers; substations; switching stations and substations; circuit breakers; and all such other necessary facilities used for providing transmission service; in each case, owned by the Company.

ARTICLE TWO

TITLE, FORM AND TERMS AND CONDITIONS OF THE BONDS

Section 2.01.  The Bonds .

(a)                                  The Securities of this series to be issued under the Mortgage Indenture pursuant to this Tenth Supplemental Indenture shall be designated as “4.32% First Mortgage Bonds, Series I due 2051” (the “ Bonds ”) and shall be Securities issued under the Mortgage Indenture.

(b)                                  The Trustee shall authenticate and deliver the Bonds for original issue on the Closing Date in the aggregate principal amount of $175,000,000, upon a Company Order for the authentication and delivery thereof pursuant to Section 4.01 of the Mortgage Indenture.

(c)                                   Interest on the Bonds shall be payable to the Persons in whose names such Bonds are registered at the close of business on the Regular Record Date for such interest (as specified in Section 2.01(e) below), except as otherwise expressly provided in the form of such Bonds attached hereto as Exhibit C .

(d)                                  The Bonds shall mature and the principal thereof shall be due and payable together with all accrued and unpaid interest thereon on November 1, 2051.

(e)                                   The Bonds shall bear interest at the rate of 4.32% per annum; provided that, to the extent permitted by law, any overdue payment (including any overdue prepayment) of principal, any overdue payment of interest and any overdue payment of any Make-Whole Amount shall bear interest at a rate per annum from time to time equal to the greater of (x) 6.32% and (y) 2.0% over the rate of interest publicly announced by JPMorgan Chase Bank, N.A. from time to time in New York, New York as its “base” or “prime” rate.  Interest shall accrue on the Bonds from the Closing Date, or the most recent date to which interest has been paid or duly provided for.  The Interest Payment Dates for the Bonds shall be May 1 and November 1 in each year, commencing May 1, 2019, and the Regular Record Dates with respect to the Interest Payment Dates for the Bonds shall be the 15th calendar day preceding each Interest Payment Date (whether or not a Business Day); provided, however that interest payable at Maturity will be payable to the Bondholder to whom principal is payable.

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(f)                                    Subject to Section 2.02 hereof, the office or agency of the Trustee in New York, New York, which as of the date hereof is located at c/o The Bank of New York Mellon, Trust Services Window, 240 Greenwich Street, New York, New York 10286, shall be the place at which the principal of and Make-Whole Amount, if any, and interest on the Bonds shall be payable.  The office or agency of the Trustee, which as of the date hereof is located at c/o The Bank of New York Mellon Trust Company, N.A., 111 Sanders Creek Corporate Center (Bldg), East Syracuse, New York 13057, shall be the place at which registration of transfer of the Bonds may be effected; and The Bank of New York Mellon Trust Company, N.A. shall be the Security Registrar and the Paying Agent for the Bonds; provided, however , that the Company reserves the right to designate, by one or more Officer’s Certificates, its principal office in Novi, Michigan as any such place or itself as the Security Registrar; provided, however, that there shall be only a single Security Registrar for the  Bonds.

(g)                                   The Bonds shall be issuable in registered form in denominations of at least $250,000 or any integral multiple thereof.

(h)                                  All payments of the principal of and Make-Whole Amount, if any, and interest on the Bonds shall be made in such coin or currency of the United States of America as at the time of payment shall be legal tender for the payment of public and private debts.

(i)                                      The Bonds shall not be defeasible pursuant to Sections 9.04(b) or (c) of the Indenture and such Sections of the Indenture shall not apply to the Bonds.

(j)                                     The Bonds shall have such other terms and provisions as are provided in the form thereof attached hereto as Exhibit C , and shall be issued in substantially such form.

Section 2.02.  Payment on the Bonds .

(a)                                  Subject to Section 2.02(b) hereof, payments of principal, Make-Whole Amount, if any, and interest becoming due and payable on the Bonds shall be made at the Place of Payment designated in Section 2.01(f) hereof or such place as the Company may at any time, by notice, specify to each Bondholder, so long as such Place of Payment shall be either the principal office of the Company or the principal office of a bank or trust company in New York, New York.

(b)                                  So long as any Initial Bondholder or its nominee shall be a Bondholder, and notwithstanding anything contained in the Indenture, Section 2.02(a) hereof or in such Bond to the contrary, the Company will pay all sums becoming due on such Bond for principal, Make-Whole Amount, if any, and interest by the method and at the address specified for such purpose below such Initial Bondholder’s name in Schedule A to the Purchase Agreement, or by such other method or at such other address as such Initial Bondholder shall have from time to time specified to the Company and the Trustee in writing for such purpose in accordance with the Purchase Agreement, without the presentation or surrender of such Bond or the making of any notation thereon, except that concurrently with or reasonably promptly after payment or redemption in full of any Bond, such Initial Bondholder shall surrender such Bond for cancellation to the Company at its principal office or at the Place of Payment most recently designated by the Company pursuant to Section 2.02(a) hereof.  Prior to any sale or other disposition of any Bond held by such Initial Bondholder or its nominee such Initial Bondholder will, at its election, either endorse thereon the amount of principal paid thereon and the last date to which interest has been paid thereon or surrender such Bond to the Company in exchange for a new Bond or Bonds pursuant to Section 3.05 of the Indenture; provided , that a transfer by endorsement shall not constitute a registration of transfer for purposes of the Indenture and the Trustee and any agent of the Trustee shall be entitled to the protections of Section 3.08 of the Indenture with respect to any Bond, the transfer of which has not been so registered.  The Company will afford the benefits of this Section 2.02(b) to any

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Institutional Investor that is the direct or indirect transferee of any Bond purchased by such Initial Bondholder under the Indenture. The Company agrees and acknowledges that the Trustee shall not be liable for any Bondholder’s failure to perform its obligations under this Section 2.02(b).  Each Initial Bondholder and any such Institutional Investor by its purchase of its Bond agrees to indemnify the Trustee for, and to hold it harmless against, any loss, liability or expense incurred without negligence, willful misconduct or bad faith on its part, arising out of or in connection with such Bondholder’s or Institutional Investor’s failure to comply with the provisions of this Section 2.02(b), including the costs and expenses of defending itself against any claim or liability in connection therewith, such indemnity to survive the payment of such Bonds and the resignation or removal of the Trustee.

(c)                                   Notwithstanding anything to the contrary in Section 1.18 of the Mortgage Indenture, if the Stated Maturity or any Redemption Date of the Bonds shall not be a Business Day at any Place of Payment, then (notwithstanding any other provision of the Mortgage Indenture or this Tenth Supplemental Indenture) payment of interest on or principal (and premium, if any) of the Bonds due at the Stated Maturity or on any Redemption Date thereof need not be made at such Place of Payment on such date, but may be made on the next succeeding Business Day at such Place of Payment with the same force and effect as if made on the Stated Maturity or on any Redemption Date thereof, provided that interest shall accrue on the outstanding principal amount of the Bonds due at the Stated Maturity or on any Redemption Date thereof at the rate set forth in the Bonds until the date of actual payment.

Section 2.03.  Mandatory Redemption of the Bonds .

Pursuant to Section 5.01 of the Mortgage Indenture, in the event that any one or more Dispositions during any consecutive 12-month period  yield Net Proceeds in excess of 10% of the Fair Value of the Mortgaged Property as of the last day of the fiscal quarter of the Company most recently ended, in the aggregate, the Net Proceeds of such Disposition or Dispositions shall be used for the mandatory redemption of the Bonds, and/or the redemption or prepayment of other Senior Secured Debt in accordance with its terms, on a date which is no more than nine months following a Disposition that, when aggregated with any other Dispositions, requires compliance with this Section 2.03 unless (x) during the nine-month period immediately preceding the date of such Disposition, the Company Invested in any Rate Base Assets in which case an amount of such Net Proceeds equal to the excess, if any, of (A) the total aggregate amount of all such Investments made during such preceding nine-month period (excluding, however, the amount of any Investments made pursuant to clause (b) of the definition of “Investment” that were not expended for Rate Base Assets during such nine-month period) over (B) the aggregate amount of Debt incurred by the Company (which, with respect to any Debt incurred under any permitted credit facility of a revolving nature, shall be calculated on a net basis after taking into account any borrowings, prepayments, repayments, reborrowings or other extensions of credit made by or in favor of the Company thereunder), in each case, during such preceding nine-month period, need not be applied to such redemption or prepayment, as the case may be, or (y) during the nine-month period following the date of such Disposition, the Company shall Invest in Rate Base Assets, in which case an amount of such Net Proceeds so Invested during such following nine-month period need not be applied to such redemption or prepayment, as the case may be; provided, however , that in the event that any such amounts referred to in this clause (y) Invested pursuant to clause (b) of the definition of “Investment” are not expended for Rate Base Assets within a period of six months from the end of such following nine-month period, any such amounts not so expended shall be used for the mandatory redemption of the Bonds, and/or the redemption or prepayment of other Senior Secured Debt in accordance with its terms, on a date not later than the last day of such six month period.  Any redemption of the Bonds pursuant to this Section 2.03 shall be made (i) at a Redemption Price equal to the principal amount of the Bonds being redeemed and shall be accompanied by payment of accrued and unpaid interest on the principal amount of the Bonds so redeemed to the redemption date and a Make-Whole Amount and (ii) in accordance with the procedures for optional redemption set forth in Section 2.04(c) hereof.

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Notwithstanding anything to the contrary in this Section 2.03, any amounts utilized pursuant to clauses (x) or (y) above to reduce the amount of Net Proceeds required to be applied to redemption of the Bonds and/or redemption or prepayment of other Senior Secured Debt in accordance with its terms may be utilized no more than once with respect to the Net Proceeds of any one or more Dispositions occurring in any consecutive twelve month period.

Section 2.04.  Optional Redemption .

(a)                                  Pursuant to Section 5.01 of the Mortgage Indenture, the Bonds may be redeemed at the option of Company, in whole or in part, at any time or from time to time at a Redemption Price equal to the principal amount of such Bonds plus the Make-Whole Amount plus accrued and unpaid interest thereon to the redemption date; provided, however, that if the Bonds are redeemed in part, the Bonds shall not be redeemed in an amount less than $5,000,000 of the aggregate principal amount of the Bonds then Outstanding.

(b)                                  Pursuant to Section 5.01 of the Mortgage Indenture, the Bonds may be redeemed at the option of the Company, in whole, on or after May 1, 2051 at a redemption price equal to the principal amount of such Bonds plus accrued and unpaid interest thereon to the redemption date.

(c)                                   Notwithstanding anything to the contrary in Article V of the Mortgage Indenture, the redemption of the Bonds shall take place in accordance with the procedures and requirements set forth in this Section 2.04(c), without prejudice to the requirements of Section 5.02 of the Mortgage Indenture (which shall for purposes of this Tenth Supplemental Indenture also be applicable to a redemption under Section 2.03 hereof) and Sections 5.05 and 5.06 of the Mortgage Indenture.  The Company (or the Security Registrar, if so requested pursuant to Section 5.04 of the Mortgage Indenture) shall give each Bondholder written notice of each optional redemption under this Section 2.04, or a mandatory redemption under Section 2.03 hereof, as the case may be, not less than ten (10) days and not more than sixty (60) days prior to the date fixed for such redemption.  Each such notice shall specify such date, the aggregate principal amount of the Bonds to be redeemed on such date, the principal amount of each Bond held by such Bondholder to be redeemed (determined in accordance with Section 2.04(d) hereof) and the interest to be paid on the redemption date with respect to such principal amount being redeemed, and shall be accompanied by a certificate of a Senior Financial Officer as to the estimated Make-Whole Amount, if applicable, due in connection with such redemption (calculated as if the date of such notice were the date of the redemption), setting forth the details of such computation.  Two (2) Business Days prior to such redemption, the Company shall deliver to each Bondholder and the Trustee a certificate of a Senior Financial Officer specifying the calculation of such Make-Whole Amount, if applicable, as of the specified redemption date.  The Trustee shall have no responsibility for such calculation.  Each notice of redemption shall be irrevocable and unconditional and the principal amount of each Bond to be redeemed shall mature and become due and payable on the date fixed for such redemption (which shall be a Business Day), together with interest on such principal amount accrued to such date and the Make-Whole Amount (if applicable).  From and after such date, unless the Company shall fail to pay such principal amount when so due and payable, together with the interest and Make-Whole Amount, if any, as aforesaid, interest on such principal amount shall cease to accrue.  Any Bond redeemed in full shall be surrendered (as contemplated by Section 2.02(b) hereof) to the Company and cancelled and shall not be reissued, and no Bond shall be issued in lieu of any redeemed principal amount of any Bond.

(d)                                  Notwithstanding anything to the contrary in Article V of the Mortgage Indenture, in the case of each partial redemption of the Bonds pursuant to Section 2.04(c) hereof, the Company shall redeem the same percentage of the unpaid principal amount of each of the Bonds, and the principal amount of each of the Bonds to be so redeemed shall be allocated by the Trustee among all of the Bonds at the time Outstanding in proportion, as nearly as practicable, to the respective unpaid principal amounts

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of each of the Bonds not theretofor called for redemption. Bonds selected to be redeemed will be redeemed in amounts of $250,000 and any integral multiple thereof and no Bonds of $250,000 or less can be redeemed in part.

Section 2.05.  Purchase of Bonds .

Except as may be agreed to by a Bondholder or Bondholders in connection with an offer made to all Bondholders on the same terms and conditions, the Company shall not and shall not permit any Affiliate to purchase, redeem or otherwise acquire, directly or indirectly, any of the Outstanding Bonds except upon the payment or redemption of the Bonds in accordance with the terms of the Indenture.  The Company will promptly cause the Trustee to cancel all Bonds acquired by it or any Affiliate pursuant to any payment, redemption or purchase of Bonds pursuant to any provision of the Indenture and no Bonds may be issued in substitution or exchange for any such Bonds.

Section 2.06.  Payment upon Event of Default .

Upon any Bonds becoming due and payable under Section 10.02 of the Indenture, whether automatically or by declaration, such Bonds will forthwith mature and the entire unpaid principal amount of such Bonds, plus (x) all accrued and unpaid interest thereon (including, without limitation, interest accrued thereon at the applicable rate for overdue payments) and (y) the Make-Whole Amount determined in respect of such principal amount shall all be immediately due and payable, in each and every case without presentment, demand, protest or further notice, all of which are hereby waived.  The Company acknowledges that each holder of a Bond has the right to maintain its investment in the Bonds free from repayment by the Company (except as herein specifically provided for) and that the provision for payment of a Make-Whole Amount by the Company in the event that the Bonds have become due and payable under Section 10.02 of the Indenture, whether automatically or by declaration, as a result of an Event of Default, is intended to provide compensation for the deprivation of such right under such circumstances.

Section 2.07.  Transfers .

In registering the transfer of any Bond in accordance with Section 3.05 of the Mortgage Indenture, the Security Registrar and the Trustee shall have no responsibility to monitor securities law compliance in connection with any such transfer.

ARTICLE THREE

ADDITIONAL COVENANTS

Section 3.01.  Affirmative Covenants of the Company .

For purposes of the Bonds, pursuant to Section 3.01(u) of the Mortgage Indenture, Article VI of the Mortgage Indenture is hereby supplemented by incorporating therein the following additional affirmative covenants which the Company shall observe solely for the benefit of the Bondholders for so long as any Bond is Outstanding:

(a)                                  Use of Proceeds .  The Company shall apply the net proceeds from the issuance and sale of the Bonds to (i) repay the Company’s existing indebtedness under its Revolving Credit Agreement, partially fund capital expenditures and for general corporate purposes, and (ii) pay reasonable fees and expenses associated with the sale of the Bonds.

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(b)                                  Compliance with Laws and Regulations .  The Company shall comply with all Laws (including Environmental Laws) to which its Property or assets may be subject, except where failure to comply would not, individually or in the aggregate, reasonably be expected to result in a Material Adverse Effect.  In addition, the Company shall immediately pay or cause to be paid when due all costs and expenses incurred in such compliance, except to the extent that the same is being contested in good faith by the Company through appropriate means under circumstances where none of the Mortgaged Property or the Liens thereon will be endangered.

(c)                                   Real Estate Filings .  To the extent that any filing required to perfect any security interest in real property or fixtures constituting Mortgaged Property is not made on or prior to the Closing Date, the Company shall undertake to present all such documents for filing with the appropriate registers of deeds as soon as practicable after the Closing Date, but in no event shall any such presentation for filing take place more than five (5) Business Days after the Closing Date; provided that the Company shall confirm by an Officer’s Certificate delivered to the Trustee within six (6) weeks after the Closing Date that each such document has been recorded with the applicable registers of deeds and the security interests created or purported to be created in real property or fixtures by such documents have been fully perfected by recording in the land records.

(d)                                  Delivery of Opinions of Counsel .  The Company shall deliver, or cause to be delivered, to the Trustee the opinions of counsel required pursuant to Section 4.4(a) of the Purchase Agreement.

Section 3.02.  Negative Covenants of the Company .

For purposes of the Bonds, pursuant to Section 3.01(u) of the Mortgage Indenture, Article VI of the Mortgage Indenture is hereby supplemented by incorporating therein the following negative covenants which the Company shall observe solely for the benefit of the Bondholders for so long as any Bond is Outstanding:

(a)                                  Limitation on Lines of Business .  As of the Closing Date, the Company is in the business of owning electric transmission facilities and providing electric transmission service over such facilities.  From the Closing Date onward, the Company shall not engage in any business, if as a result, the general nature of the business engaged in by the Company taken as a whole would be substantially changed from the general nature of the business the Company is engaged in on the Closing Date.

(b)                                  Amendments to Exhibit B Hereto . The Company shall not make any amendments or changes to the subordination terms and conditions set forth in Exhibit B hereto that adversely affect the Bondholders without the prior consent of the Bondholders of all the Outstanding Bonds.

ARTICLE FOUR

ADDITIONAL EVENTS OF DEFAULT; REMEDIES

Section 4.01.  Events of Default .

For purposes of the Bonds, pursuant to Section 3.01(u) of the Mortgage Indenture, Section 10.01 of the Mortgage Indenture shall be supplemented to include as “Events of Default” thereunder the occurrence of any of the following events (each such event, together with those “Events of Default” in Section 10.01 of the Mortgage Indenture, an “Event of Default”):

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(a)                                  Material Covenants .  The Company shall fail to perform or observe any covenant set forth in Section 3.02 hereof or its obligation to provide notice to the Bondholders under Section 7.1(b) of the Purchase Agreement and such failure is not cured within thirty (30) days after earlier to occur of (i) a Responsible Officer of the Company obtaining actual knowledge of such failure and (ii) the Company receiving written notice of such failure from the Trustee or any Bondholder in accordance with the terms of the Mortgage Indenture or the Purchase Agreement;

(b)                                  Other Covenants .  The Company shall fail to perform or observe any of its obligations or covenants (other than a failure to comply with the events that constitute an Event of Default under Section 4.01(a) hereof or under Section 10.01(a), Section 10.01(b) or Section 10.01(d) of the Mortgage Indenture) contained in any of the Financing Agreements, including Section 7 of the Purchase Agreement (or in any modification or supplement thereto), and such failure is not cured within sixty (60) days (or ninety (90) days with respect to the covenant contained in Section 12.04 of the Mortgage Indenture) after the earlier to occur of (i) a Responsible Officer of the Company obtaining actual knowledge of such failure and (ii) the Company receiving written notice of such failure from the Trustee or any Bondholder in accordance with the terms of the Mortgage Indenture or the Purchase Agreement;

(c)                                   Representations .  Any representation, warranty or certification by the Company in any of the Financing Agreements or in any certificate furnished to the Trustee or any Bondholder pursuant to the provisions of this Tenth Supplemental Indenture or any other Financing Agreement shall prove to have been false in any Material respect as of the time made or furnished, as the case may be;

(d)                                  Debt .

(i)                                      The Company shall be in default in the payment of any principal, premium, including any make-whole amount, if any, or interest on any Debt (other than Subordinated Debt) in the aggregate principal amount of $30,000,000 or more beyond the expiration of any applicable grace or cure period relating thereto;

(ii)                                   The Company shall be in default in the performance or compliance with any term (other than those referred to in Section 4.01(d)(i) hereof) of any agreement or instrument evidencing any Debt (other than Subordinated Debt) in the aggregate principal amount of $30,000,000 or more or any other document relating thereto or any condition exists and, as a consequence, such Debt has become or has been declared (or the holder or beneficiary of such Debt or a trustee or agent on behalf of such holder or beneficiary is entitled to declare such Debt to be) due and payable before its stated maturity or before its regularly scheduled dates of payment; or

(iii)                                As a consequence of the occurrence or continuation of any event or condition (other than the passage of time or the right of the holder of Debt to convert such Debt into equity interests), other than as provided in Section 2.03 or Section 2.04 hereof or Section 5.01 of the Mortgage Indenture, (x) the Company shall have become obligated to purchase or repay any Debt before its regularly scheduled maturity date in the aggregate principal amount of $30,000,000 or more or (y) one or more Persons have the right to require such Debt to be purchased or repaid;

(e)                                   Judgments .  Any judgment or judgments for the payment of money in excess of $30,000,000 (or its equivalent in any other currency) in the aggregate by the Company, which is, or are, not covered by insurance, shall be rendered by one or more courts, administrative tribunals or other bodies having jurisdiction over the Company and the same shall not be discharged (or provision shall not be made for such discharge), bonded or a stay of execution thereof shall not be procured, within 60 days

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from the date of entry thereof and the Company shall not, within said period of 60 days, or such longer period during which execution of the same shall have been stayed, appeal therefrom and cause the execution thereof to be stayed during such appeal; or

(f)                                    Change in Ownership .  A Change in Ownership shall occur.

Section 4.02.  Acceleration of Maturity; Rescission and Annulment .

For purposes of the Bonds, pursuant to Section 3.01(u) of the Mortgage Indenture, Section 10.02 of the Mortgage Indenture shall be supplemented as follows:

(a)                                  Acceleration of Maturity .  In addition to the provisions set forth in Section 10.02 of the Mortgage Indenture, if an Event of Default arising from the failure to pay principal of, or interest on, or any Make-Whole Amount relating to the Bonds shall have occurred and be continuing, then in every such case each Holder of Bonds may declare the principal amount of the Bonds held by it to be due and payable immediately, by a notice in writing to the Company and to the Trustee, and upon receipt by the Company or the Trustee of such notice of such declaration, such principal amount, together with Make-Whole Amount and accrued interest, if any, thereon (including, without limitation, interest accrued thereon at the applicable rate for overdue payments), shall become immediately due and payable.

ARTICLE FIVE

AMENDMENTS TO THE PROVISIONS

Subject to Article Six hereof:

(a)                                  Clause (d) of the definition of “Excepted Property” in the preamble of the Mortgage Indenture is hereby amended by deleting the phrase “for the purpose of sale or lease.”

(b)                                  The definition of “Authorized Officer” in Section 1.01 of the Mortgage Indenture is hereby amended by replacing the phrase “any two such Authorized Officers” with the phrase “any such Authorized Officer.”

(c)                                   The definition of “Company Order” or “Company Request” in Section 1.01 of the Mortgage Indenture is hereby amended by replacing the phrase “two Authorized Officers” with the phrase “an Authorized Officer.”

(d)                                  Clauses (b), (c), (d), (f) and (g) of the definition of “Investment Securities” in Section 1.01 of the Mortgage Indenture is hereby amended by replacing the phrase “rated by a nationally recognized rating organization in either of the two (2) highest rating categories (without regard to modifiers) for short-term securities or in any of the three (3) highest rating categories (without regard to modifiers) for long-term securities” with the phrase “rated investment grade by a nationally recognized rating organization.”

(e)                                   Clause (c) of the definition of “Permitted Liens” in Section 1.01 of the Mortgage Indenture is hereby amended by replacing the phrase “Ten Million Dollars ($10,000,000)” with the phrase “Fifty Million Dollars ($50,000,000)” and by replacing the phrase “three percentum (3%)” with the phrase “ten percentum (10%),” and clause (q) of the definition of “Permitted Liens” in Section 1.01 of the Mortgage Indenture is hereby amended by deleting the phrase “, provided that Purchase Money Liens, if any, with respect to the electric transmission assets of IP&L acquired by the Company in the Acquisition shall not be Permitted Liens.”

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(f)                                    The definition of “Person” in Section 1.01 of the Mortgage Indenture is hereby amended by deleting such section in its entirety and substituting in lieu thereof the following: “‘ Person ’ means any individual, corporation, limited liability company, partnership, limited liability partnership, association, company, joint stock company, joint venture, trust or unincorporated organization or any Governmental Authority.”

(g)                                   Section 1.08 of the Mortgage Indenture is hereby amended by replacing the phrase “Attention: Daniel J. Oginsky, Esq.” with the phrase “General Counsel.”

(h)                                  Section 1.13 of the Mortgage Indenture is hereby amended by deleting such section in its entirety and substituting in lieu thereof the following: “In case any provision, or any portion of any provision, in this Indenture or the Securities shall be held to be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining potion or provisions shall not in any way be affected or impaired thereby.”

(i)                                      Section 1.17 of the Mortgage Indenture is hereby amended by replacing the phrase “Each of the Company and the Trustee hereby” with the phrase “Each of the Company, the Holders and the Trustee hereby.”

(j)                                     Section 6.01(b) of the Mortgage Indenture is hereby amended by deleting such section in its entirety and substituting in lieu thereof the following: “At the date of the execution and delivery of this Indenture, as originally executed and delivered, the Company covenants and agrees that it shall be lawfully possessed of the Mortgaged Property except for any legal defects or other failures to lawfully possess Mortgaged Property that do not in the aggregate materially impair the use by the Company of the Mortgaged Property considered as a whole for the purposes for which it is held by the Company.”

(k)                                  Section 6.04 of the Mortgage Indenture is hereby amended by replacing the phrase “and (ii) obtain” with the phrase “and (ii) use its reasonable best efforts to obtain.”

(l)                                      Sections 6.07(b)(iii) and 6.07(c)(iii) of the Mortgage Indenture are hereby amended by replacing the phrase “seventy percentum (70%)” with the phrase “sixty six and two-thirds percentum (66 2/3%).”

(m)                              Section 6.09 of the Mortgage Indenture is hereby amended by replacing the phrase “or as may be requested by the Trustee” with the phrase “or as may be requested by the Trustee; provided that the Company shall not be required to record this Indenture or any supplemental indentures in any new jurisdiction in which it acquires property until it next issues Securities hereunder.”

(n)                                  Section 9.04(d)(i) of the Mortgage Indenture is hereby amended by replacing the phrase “on the respective Stated Maturities” with the phrase “on the respective Stated Maturities or Redemption Date.”

(o)                                  Sections 9.04(d)(ii) and 9.04(d)(iii) of the Mortgage Indenture are hereby amended by replacing the phrase “an Opinion of Counsel” with the phrase “an Opinion of Counsel, subject to the customary assumptions and exceptions” and the phrase “not recognize gain or loss” with the phrase “not recognize income, gain or loss.”

(p)                                  Section 11.03 of the Mortgage Indenture is hereby amended to add the following subsections:

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“(o)                            The Trustee shall not be responsible or liable for any failure or delay in the performance of its obligations under the Mortgage Indenture (as amended or supplemented) arising out of or caused, directly or indirectly, by circumstances beyond its reasonable control, including, without limitation, acts of God; earthquakes; fire; flood; terrorism; wars and other military disturbances; sabotage; epidemics; riots; interruptions; loss or malfunctions of utilities, computer (hardware or software) or communication services; accidents; labor disputes; acts of civil or military authority and governmental action.

(p)                                  Notwithstanding anything to the contrary contained in this Mortgage Indenture (as amended or supplemented), the Company, the Trustee and any Paying Agent may, to the extent it is required to do so by law, deduct or withhold income or other similar taxes imposed from principal or interest payments hereunder.  The Company, the Trustee and the Paying Agent shall reasonably cooperate with each other and shall provide each other with copies of documents or information reasonably necessary for each of the Company, the Trustee and the Paying Agent to comply with any withholding tax or tax information reporting obligations imposed on any of them, including any obligations imposed pursuant to an agreement with a governmental authority.”

(q)                                  Section 12.04(a) of the Mortgage Indenture is hereby amended by replacing the phrase “90 day” with the phrase “105 days.”

(r)                                     Section 12.04(b) of the Mortgage Indenture is hereby amended by replacing the phrase “45 days” with the phrase “60 days.”

(s)                                    Section 13.01 of the Mortgage Indenture is hereby amended by replacing the phrase “the Company shall not consolidate with or merge into any other corporation” with the phrase “the Company shall not consolidate with or merge into any other Person.”

(t)                                     The first paragraph of Section 13.01(b) of the Mortgage Indenture is hereby amended by deleting such paragraph in its entirety and substituting in lieu thereof the following:  “the Person formed by such consolidation or into which the Company is merged or the Person which acquires by conveyance or other transfer, or which leases, the Mortgaged Property as or substantially as an entirety shall be a Person organized and existing under the laws of the United States, any State or Territory thereof or the District of Columbia (such Person being hereinafter sometimes called the “ Successor Person ”) and shall execute and deliver to the Trustee an indenture supplemental hereto, in form recordable and reasonably satisfactory to the Trustee, which:”

(u)                                  Sections 1.01, 1.03, 13.01(b)(i), 13.01(b)(ii), 13.02 and 13.03 of the Mortgage Indenture are hereby amended by replacing the term “ successor corporation ” or “ Successor Corporation ,” as the case may be, with the term “ Successor Person .”

(v)                                  Section 16.01 of the Mortgage Indenture is hereby amended by deleting such section in its entirety and substituting in lieu thereof the following: “No recourse shall be had for the payment of the principal of or premium, if any, or interest, if any, on any Securities, or any part thereof, or for any claim based thereon or otherwise in respect thereof, or of the indebtedness represented thereby, or upon any obligation, covenant or agreement under this Indenture, against any incorporator, organizer, member, manager, stockholder, officer, director or employee, as such, past, present or future, of the Company, its direct or indirect owners or of any predecessor or successor Person (either directly or through the Company or a predecessor or successor Person), whether by virtue of any constitutional

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provision, statute or rule of law or by the enforcement of any assessment or penalty or otherwise; it being expressly agreed and understood that this Indenture and all the Securities are solely obligations of the Company and that no personal liability whatsoever shall attach to, or be incurred by, any incorporator, organizer, member, manager, stockholder, officer, director or employee, past, present or future, of the Company or its direct or indirect owners or of any predecessor or successor Person, either directly or indirectly through the Company or its direct or indirect owners or any predecessor or successor Person, because of the indebtedness hereby authorized or under or by reason of any of the obligations, covenants or agreements contained in this Indenture or in any of the Securities or to be implied herefrom or therefrom; and such personal liability, if any, is hereby expressly waived and released as a condition of, and as part of the consideration for, the execution and delivery of this Indenture, as originally executed and delivered, and the issuance of the Securities.”

ARTICLE SIX

MISCELLANEOUS PROVISIONS

Section 6.01.  Execution of Tenth Supplemental Indenture .

Except as expressly amended and supplemented hereby, the Mortgage Indenture shall continue in full force and effect in accordance with the provisions thereof and the Mortgage Indenture is in all respects hereby ratified and confirmed.  This Tenth Supplemental Indenture and all of its provisions shall be deemed a part of the Mortgage Indenture in the manner and to the extent herein and therein provided.  The Bonds executed, authenticated and delivered under this Tenth Supplemental Indenture constitute a series of Securities and shall not be considered to be a part of a series of securities executed, authenticated and delivered under any other supplemental indenture entered into pursuant to the Mortgage Indenture.

Section 6.02.  Effect of Headings .

The Article and Section headings herein are for convenience only and shall not affect the construction hereof.

Section 6.03.  Successors and Assigns .

All covenants and agreements in this Tenth Supplemental Indenture by the Company shall bind its successors and assigns, whether so expressed or not.

Section 6.04.  Severability Clause .

In case any provision in this Tenth Supplemental Indenture or in the Bonds shall be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby.

Section 6.05.  Benefit of Tenth Supplemental Indenture .

Except as otherwise provided in the Mortgage Indenture, nothing in this Tenth Supplemental Indenture or in the Bonds, express or implied, shall give to any person, other than the parties hereto and their successors hereunder and the Bondholders, any benefit or any legal or equitable right, remedy or claim under this Tenth Supplemental Indenture.

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Section 6.06.  Execution and Counterparts .

This Tenth Supplemental Indenture may be executed in any number of counterparts, each of which shall be deemed to be an original, but all such counterparts shall together constitute but one and the same instrument.  Any such counterpart, as recorded or filed in any jurisdiction, may omit such portions of Exhibit A hereto as shall not describe or refer to properties located in such jurisdiction.  The exchange of copies of this Tenth Supplemental Indenture and of signature pages by facsimile or electronic format (i.e., “pdf” or “tif”) transmission shall constitute effective execution and delivery of this Tenth Supplemental Indenture as to the parties hereto and may be used in lieu of the original Tenth Supplemental Indenture for all purposes. Signatures of the parties hereto transmitted by facsimile or electronic format (i.e., “pdf” or “tif”) shall be deemed to be their original signatures for all purposes.

Section 6.07.  Conflict with Mortgage Indenture .

If any provision hereof limits, qualifies or conflicts with another provision of the Mortgage Indenture, such provision of this Tenth Supplemental Indenture shall control, insofar as the rights between the Company and the Bondholders are concerned.

Section 6.08.  Recitals .

The recitals and statements contained herein shall be taken as the statements of the Company, and the Trustee assumes no responsibility for their correctness and makes no representations as to the validity or sufficiency of this Tenth Supplemental Indenture.

Section 6.09.  Governing Law .

This Tenth Supplemental Indenture shall be governed by and construed in accordance with the law of the State of New York, except that (i) if this Tenth Supplemental Indenture shall become qualified and shall become subject to the Trust Indenture Act, to the extent that the Trust Indenture Act shall be applicable, this Tenth Supplemental Indenture shall be governed by and construed in accordance with the Trust Indenture Act and (ii) if the law of any jurisdiction wherein any portion of the Mortgaged Property is located shall govern the creation of a mortgage lien on and security interest in, or perfection, priority or enforcement of the Lien of the Indenture or exercise of remedies with respect to, such portion of the Mortgaged Property, this Tenth Supplemental Indenture shall be governed by and construed in accordance with the law of such jurisdiction to the extent mandatory.

Section 6.10.  Future Advances Secured .

(a)                                  Illinois Provisions . The Company acknowledges and agrees and intends that all advances made to it pursuant to issuances hereunder of the Securities, including all future issuances and advances related thereto whenever hereafter made, in an amount up to $175,000,000, together with the amount of all prior advances pursuant to Securities issuances heretofore made pursuant to the Mortgage Indenture, the First Supplemental Indenture, the Second Supplemental Indenture, the Third Supplemental Indenture, the Fourth Supplemental Indenture, the Fifth Supplemental Indenture, the Sixth Supplemental Indenture, the Seventh Supplemental Indenture, the Eighth Supplemental Indenture and the Ninth Supplemental Indenture for a combined total principal amount of $1,085,000,000 plus interest thereon, and all fees, expenses and indemnities owing in respect of the Securities and the Financing Agreements, and all disbursements made by or on behalf of the Trustee for payment of taxes, levies, insurance or maintenance on the Mortgaged Property, with interest on such disbursements (the sum of all such Outstanding Securities, interest, fees, expenses, indemnities and disbursements is referred to as the “Total Secured Amount”), shall be a lien in the Total Secured Amount from the time this Tenth Supplemental

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Indenture is recorded, as provided in 765 ILCS 5/39, et seq. for all amounts advanced or applied prior to the date hereof and within the period of eighteen (18) months after the date of recordation of this Tenth Supplemental Indenture. Except as amended hereby (in this Tenth Supplemental Indenture), the Mortgage Indenture, as previously amended, is hereby restated, adopted, ratified and confirmed.

(b)                                  Minnesota Provisions . Subject to the provision of the Mortgage Indenture which provides that notwithstanding anything to the contrary contained in the Mortgage Indenture enforcement of the Mortgage Indenture in Minnesota is limited to a debt amount of $26,866,430.00 under Chapter 287 of Minnesota Statutes, this Tenth Supplemental Indenture secures credit in the amount of ONE HUNDRED SEVENTY-FIVE MILLION DOLLARS ($175,000,000) together with the amount of all prior advances pursuant to Securities issuances heretofore made pursuant to the Mortgage Indenture, the First Supplemental Indenture, the Second Supplemental Indenture, the Third Supplemental Indenture, the Fourth Supplemental Indenture, the Fifth Supplemental Indenture, the Sixth Supplemental Indenture,  the Seventh Supplemental Indenture, the Eighth Supplemental Indenture and the Ninth Supplemental Indenture for a total combined amount advanced of ONE BILLION EIGHTY-FIVE MILLION DOLLARS ($1,085,000,000). Loans and advances up to this amount, together with interest, are senior to indebtedness to other creditors under subsequently recorded or filed mortgages and liens.

(c)                                   Missouri Provisions . This Tenth Supplemental Indenture secures present credit in the amount of ONE HUNDRED SEVENTY-FIVE MILLION DOLLARS ($175,000,000) together with the amount of all prior advances pursuant to Securities issuances heretofore made pursuant to the Mortgage Indenture, the First Supplemental Indenture, the Second Supplemental Indenture, the Third Supplemental Indenture, the Fourth Supplemental Indenture, the Fifth Supplemental Indenture, the Sixth Supplemental Indenture,  the Seventh Supplemental Indenture, the Eighth Supplemental Indenture and the Ninth Supplemental Indenture, for a total combined amount advanced of ONE BILLION EIGHTY-FIVE MILLION DOLLARS ($1,085,000,000) together with future advances and obligations in an amount not to exceed ONE BILLION EIGHTY-FIVE MILLION DOLLARS ($1,085,000,000) for purposes of collateral located in the State of Missouri only. The future advances and future obligations secured hereby may be evidenced not only by the Securities herein described, but also such other notes, guarantees and other documents executed and delivered by the Company to the Trustee or Bondholders subsequent to the date hereof provided that, on the face or within the body thereof, such notes, guarantees or other documents state that they are secured by this Mortgage Indenture. Loans and advances up to this amount, together with interest, are senior to indebtedness to other creditors under subsequently recorded or filed mortgages and liens.

Section 6.11.  Interpretation of Financial Covenants .

For purposes of determining compliance with the financial covenants set out in the Indenture, any election by the Company to measure an item of Debt using fair value (as permitted by Accounting Standards Codification 825-10-25 (previously referred to as Statement of Financial Accounting Standards No. 159) or any other Accounting Standards Codification or Financial Accounting Standard having a similar result or effect) shall be disregarded and such determination shall be made by valuing Debt at 100% of the outstanding principal amount thereof (except to the extent such Debt was issued at a discount or premium in which case the value of such Debt shall be valued at 100% of the outstanding principal amount thereof, less any unamortized discount or plus any unamortized premium, as the case may be).

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IN WITNESS WHEREOF, the parties hereto have caused this Tenth Supplemental Indenture to be duly executed as of the day and year first above written.

Drafted by:

Elizabeth B. Hardin

Milbank, Tweed, Hadley & McCloy LLP

28 Liberty Street

New York, NY 10005

Phone: (212) 530-5000

After Recorded, Return to:

Dykema Gossett PLLC

10 South Wacker Drive, Suite 2300

Chicago, Illinois 60606

Attention:  Carol O’Connell

Phone: (312) 627-2303

Signature Page to

Tenth Supplemental Indenture

Signature Page to

Tenth Supplemental Indenture

On the 28 th  day of September 2018 before me, the undersigned notary public, personally came Gretchen L. Holloway, Senior Vice President and Chief Financial Officer of ITC Holdings Corp., a corporation organized under the laws of the State of Michigan, the sole member of ITC Midwest LLC, a limited liability company organized under the laws of the State of Michigan, and acknowledged that she executed the foregoing instrument in her authorized capacity, and that by her signature on the instrument she, or the entity upon behalf of which she acted, executed the instrument.

Schedule 1

The recording information for the Mortgage Indenture, the First Supplemental Indenture, the Second Supplemental Indenture, the Third Supplemental Indenture, the Fourth Supplemental Indenture, the Fifth Supplemental Indenture, the Sixth Supplemental Indenture, the Seventh Supplemental Indenture, the Eighth Supplemental Indenture and the Ninth Supplemental Indenture is as follows:

S- 1

S- 2

S- 3

S- 4

S- 5

(1)           The offices of Lee County (North) and Lee County (South) were consolidated on February 23, 2015.

S- 6

S- 7