Talen Energy and Puget Sound Energy (PSE), owners of Units 1 and 2 at the Colstrip Power Plant in Montana, have reached an agreement to shut those units down no later than July 2022.
The settlement came as a result of a lawsuit brought by the Montana Environmental Information Center and the Sierra Club in 2013 alleging violations of the Clean Air Act at Colstrip. Units 1 and 2 are the oldest at the four-unit plant, having come online in 1975 and 1976.
