Alliant Energy plans to stop using coal in its power plants by 2050 .Aug 3, 2018 . Buy Now. The coal-fired Columbia power plant near Portage, a main source of electricity for Alliant Energy Corp., will be phased out of Alliant's.coal plant for sale,Duke Energy, owners sell shuttered coal-fired power plant - Electric .Feb 27, 2018 . Duke Energy says it will continue to own and operate a transmission substation and switchyard near the plant.
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