The Virginia Corporation Commission on Monday rejected Appalachian Power’s plan to keep the John Amos and Mountaineer power plants in West Virginia operating through 2040.
The commission denied the company permission to make wastewater treatment upgrades at the plants and pass the cost on to electric power customers in the state.
Not making those upgrades would require the plants to close in 2028, under U.S. Environmental Protection Agency rules.
West Virginia’s Public Service Commission earlier this month approved Appalachian Power’s plan for Amos, in Putnam County, and Mountaineer, in Mason County.
It also approved similar upgrades to the Mitchell plant in Marshall County, which is jointly operated by Wheeling Power and Kentucky Power.
West Virginia customers will start to see a slight increase on their bills next month as a result.