High Quality Content by WIKIPEDIA articles! Oglethorpe Power Corporation medium-sized electric utility in Georgia, United States. Formed in 1974, Ogelthorpe is a not-for-profit cooperative owned by the 39 electric membership corporations that it serves. The utility's headquarters are in Tucker, Georgia. It is the largest power supply cooperative in the United States based upon assets and annual kilowatt-hour sales. The utility's service area covers 65 percent of the state of Georgia. However, Georgia Power is the largest electricity supplier in the state. Ogelthorpe co-own several of its plants with Georgia Power and the Municipal Electric Authority of Georgia. As of 2009, the utility has an annual revenue of $1.2 billion and assets of over $6 billion. In 1997, Ogelthorpe restructured into three separate, but interrelated, cooperatives. Oglethorpe Power Corporation handles electricity generation, Georgia Transmission Corporation owns and operates the transmission lines and substations...