 By August 1959, all ten units were operating.Its ten units had a combined operating capacity of 1.5-gigawatts (1,500 MW) with Units 1–4 providing electricity to the nearby Chemours plant.In a 2011 agreement with the Environmental Protection Agency (EPA) to resolve lingering violation complaints in failure to comply with the Clean Air Act, the TVA announced they would shut down the coal units at Johnsonville by 2018.