Warrior Run Generating Station, owned by the AES Corporation, was a 205 megawatt cogeneration plant located south of Cumberland, Maryland, United States, at 11600 Mexico Farms Road.

The plant used fluidized bed combustion (FBC) technology, in which bituminous coal and finely ground limestone are injected, using air, into the boiler.

The limestone reacts with sulfur dioxide, released during combustion of the coal, removing this pollutant from the plant's emissions.

[2] Fly and bottom ash from Warrior Run, which is highly alkaline due to the limestone used by the FBC boiler, was used as fill at four nearby surface coal mines.

In 2007 the Maryland Public Service Commission approved a plan permitting the Warrior Run electric output to be sold into the PJM Interconnection day-ahead wholesale market and the capacity bid into the PJM forward capacity market, with the proceeds used to reduce the surcharge.