Xcel Energy's Colorado utility is proposing to shut down, retrofit or repower about 900MW of coal-fired generation to reduce air pollution under a new state law.
Under Colorado's Clean Air-Clean Jobs Act, Xcel Energy will submit a plan to state regulators in August to reduce its nitrogen oxide emissions from coal units by up to 80% from 2008 levels by 2017.
Xcel Energy spokesman Mark Stutz told Reuters that three Denver-area coal plants are being evaluated for possible retirement or conversion to burn natural gas.
The sites that are reviewed under the plan include a 186MW coal unit at the Valmont plant, four units totalling to 717MW at the Cherokee station and a 505MW coal unit at the Pawnee station.
The plan will also include a combination of unit retirement, replacement with gas turbines or installation of improved pollution control equipment, according to Stutz.