SUGAR LAND--August 29, 2012--Written by John Egan for Industrial Info Resources (Sugar Land, Texas)--Utility subsidiaries of Black Hills Corporation (NYSE:BKH) (Rapid City, South Dakota) plan to construct a grassroot, 132-megawatt (MW), gas-fired generator near Cheyenne, Wyoming, to offset the premature closing of about 124 megawatts (MW) of coal-fired generating capacity in Colorado, Wyoming and South Dakota. These coal-fired units are being closed to comply with tougher power plant emissions regulations from the U.S. Environmental Protection Agency (EPA) (Washington, D.C.) and the state of Colorado, which passed the Clean Air -Clean Jobs Act in 2010.