Fifty years ago, when two generating units at Cardinal Power Plant were first placed into operation, Buckeye Power was a newly minted generation cooperative, formed and owned by all of the electric distribution cooperatives in Ohio. American Electric Power (AEP), which built the Cardinal plant, offered a unique partnership agreement to Buckeye Power and its member cooperatives: AEP and Buckeye Power would each own one of the two units, and AEP would operate the plant — at cost — for its partner.