Exhibit 10.2 EXHIBIT B AMENDMENT TO APS POWER AGREEMENT EFFECTIVE DATE: JANUARY 1, 1999 Except as amended below, the APS Power Agreement shall remain unchanged: Article I Definitions Section 1.2 Additional Definitions "Demand" means the expression in kilowatts of the energy stated inkilowatt-hours per hour, occurring in any one-hour interval beginning on the clock hour during any period. As applied to any Company, Demand means the Demand attributable to that Company as set by its ownership share in AGC. The Demand for each Company shall be set at the following level: Monongahela Power Company 226,800 kW The Potomac Edison Company 235,200 kW West Penn Power Company 378,000 kW "Capacity Responsibility" of a Company for a Period means the Company's Demand for the Period. IN WITNESS THEREOF, intending to be legally bound, each of the Parties has caused this Agreement to be duly executed. Allegheny Generating Company Monongahela Power Company By: /s/ Thomas K. Henderson By: Thomas K. Henderson Name: Thomas K. Henderson Name: Thomas K. Henderson Title: Vice President Title: Vice President Date: November 30, 1998 Date: November 30, 1998 The Potomac Edison Company West Penn Power Company By: /s/ Thomas K. Henderson By: Thomas K. Henderson Name: Thomas K. Henderson Name: Thomas K. Henderson Title: Vice President Title: Vice President Date: November 30, 1998 Date: November 30, 1998