The operator of the four coal-fired power plants at Colstrip told plant owners Monday it plans to exit as operator within two years.  State officials confirmed Monday they’d been told Talen Energy of Allentown, Pa., informed the plants’ utility owners that it no longer wants to operate the power plants in southeastern Montana. Late Monday, Gov. Steve Bullock said in a statement that he remains “committed to finding Montana solutions that allow these power plants to continue to operate while polluting less.”