Exhibit 10(c)4

EXECUTION VERSION

AMENDMENT NO. 1 TO INTERIM ASSESSMENT AGREEMENT

This first amendment (this “Amendment”) to the Interim Assessment Agreement dated as of March 29, 2017 (the “Interim Assessment Agreement”),¹ by and among Georgia Power Company, for itself and as agent for Oglethorpe Power Corporation, Municipal Electric Authority of Georgia and The City of Dalton, Georgia, acting by and through its Board of Water, Light and Sinking Fund Commissioners (collectively, “GPC”), and Westinghouse Electric Company LLC, WECTEC Staffing Services LLC, and WECTEC Global Project Services, Inc. f/k/a Stone and Webster (collectively, the “Debtors,” and together with GPC, the “Parties”), is entered into as of the 28th day of April, 2017.

RECITALS

WHEREAS, as of March 29, 2017, GPC and the Debtors entered into the Interim Assessment Agreement to set forth the relative rights and obligations of the Parties with respect to the Vogtle Project during the Interim Assessment Period; and

WHEREAS, on March 30, 2017, the Bankruptcy Court entered an order (D.I. 68) in the Debtors’ bankruptcy cases permitting them to enter into and perform under the Interim Assessment Agreement; and

WHEREAS, Section 2 of the Interim Assessment Agreement permits the Interim Assessment Period to be extended by agreement of all of the Parties; and

WHEREAS the Parties desire to amend the Interim Assessment Agreement solely to extend the Interim Assessment Period.

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¹ Capitalized terms not otherwise defined herein have the meanings given to them in the Interim Assessment Agreement.

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AGREEMENT

NOW THEREFORE, in consideration of the recitals, the Parties, each intending to be legally bound hereby, agree to amend the Interim Assessment Agreement as follows:

1.As permitted by Section 2 of the Interim Assessment Agreement, the Interim Assessment Period shall be extended through the earlier of (a) May 12, 2017, and (b) termination of the Interim Assessment Agreement by any Party upon five business days’ notice. The Interim Assessment Period may be further extended by agreement of all the Parties.

2.This Amendment shall be construed in connection with and as part of the Interim Assessment Agreement, and all terms, conditions, and covenants contained in the Interim Assessment 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 Interim Assessment Agreement as amended hereby.

3.The Parties hereto agree that the terms of this Amendment shall be deemed effective as of the date hereof.

4.This Amendment may be executed simultaneously in two or more counterparts, each of which shall be deemed an original, but both of which together shall constitute one and the same instrument.

5.This Amendment shall be governed by the laws of the State of New York, without regard to the application of New York’s conflict of law principles. Each Party consents to the exclusive jurisdiction of the Bankruptcy Court to resolve any dispute arising out of or relating to this Amendment.

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6.Except as expressly provided for in this Amendment, the Interim Assessment Agreement remains unchanged.

IN WITNESS WHEREOF, the Parties have duly executed this Amendment as of the date first above written.

GEORGIA POWER COMPANY, FOR ITSELF AND AS AGENT FOR OGLETHORPE POWER CORPORATION, MUNICIPAL ELECTRIC AUTHORITY OF GEORGIA AND THE CITY OF DALTON, GEORGIA, ACTING BY AND THROUGH ITS BOARD OF WATER, LIGHT AND SINKING FUND COMMISSIONERS By:  /s/Chris Cummiskey Date:  April 28, 2017	WESTINGHOUSE ELECTRIC COMPANY, LLC By:  /s/David C. Durham Date:  April 28, 2017
	WECTEC GLOBAL PROJECT SERVICES, INC. By:  /s/David C. Durham Date:  April 28, 2017
	WECTEC STAFFING SERVICES LLC By:  /s/David C. Durham Date:  April 28, 2017

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