FirstEnergy Corporation on March 31 announced that its FirstEnergy Generation Corporation subsidiary has closed the sale of its 340-megawatt (MW) Sumpter Plant in Sumpter, Mich., to Wolverine Power Supply Cooperative Inc. for an undisclosed amount. The plant, built in 2002 by FirstEnergy Generation Corporation, consists of four 85-MW natural gas combustion turbines.

The sale was previously announced on December 17, 2009. The Sumpter Plant was FirstEnergy Generation Corporation's only facility in Michigan and was no longer a good strategic fit for the company.

Wolverine Power Cooperative, headquartered in Cadillac, Mich., is a generation and transmission cooperative that provides wholesale electricity to six members in that state.

FirstEnergy is a diversified energy company headquartered in Akron, Ohio. Its subsidiaries and affiliates are involved in the generation, transmission and distribution of electricity, as well as energy management and other energy-related services. Its seven electric utility operating companies comprise the nation's fifth largest investor-owned electric system, based on 4.5 million customers served within a 36,100-square-mile area of Ohio, Pennsylvania and New Jersey; and its generation subsidiaries control more than 14,000 megawatts of capacity.