Construction of Bruce Mansfield commenced in 1970. The plant was operated by Pennsylvania Power (a subsidiary of Ohio Edison). Its ownership was a consortium of Pennsylvania Power, Ohio Edison, Cleveland Electric Illuminating, Toledo Edison, and
Duquesne Light to form the Central Area Power Coordination (CAPCO). Bruce Mansfield began commercial operations of Unit 1 in 1976 with Units 2 and 3 following suit in 1977 and 1980 respectively. All three of the units generated 830 MW each with a nameplate capacity of 2490 MW. The plant was named after D. Bruce Mansfield, a former chairman of Pennsylvania Power. FirstEnergy Solutions announced in August 2018 that they were closing Bruce Mansfield by June 2021. FirstEnergy Solutions blamed the wholesale market system, which
PJM Interconnection operates on, for not relying on coal and nuclear plants. PJM Interconnection conducted an analysis and concluded the plant's closure would not affect grid reliability. The closure was moved back to November 2019 due to, "a lack of economic viability." ==Environmental mitigation==