Black Hills Energy plans two coal unit retirements in Colorado

Black Hills/Colorado Electric Utility Co. LP d/b/a Black Hills Energy filed on June 29 with the Colorado Public Utilities Commission for a Certificate of Public Convenience and Necessity (CPCN) for the decommissioning of Units 1 and 2 at the W.N. Clark plant, which must be shut down by the end of 2013 under an emissions plan previously approved by the commission under the state’s Clean Air-Clean Jobs Act (CACJA).

W.N. Clark is located at Canon City, Colo. The site includes a control building, baghouses, a coal pile, a settling pond, intake and outfall structures, a cooling structure, a warehouse building, an electric substation, and other miscellaneous support structures. Unit 1 began commercial operation in 1955, with 18 MW of capacity, a heat rate of 13,000, using a Babcock & Wilcox boiler rated at 150,000 lbs/hr, and a General Electric turbine rated at 16,500 kW. Unit 2 began commercial operation in 1959, with 24 MW of capacity, a heat rate of 12,200, using a Babcock & Wilcox boiler rated at 210,000 lbs/hr, and a General Electric turbine rated at 22,000 kW.

“Black Hills Energy requests that the Commission grant it a CPCN for the decommissioning of the W.N. Clark Station Coal Units and, by granting a CPCN, authorize the decommissioning to move forward to completion and grant Black Hills Energy the right to spend funds to decommission and/or remove the W.N. Clark Station Coal Units, and, upon completion of the work, to recover from ratepayers (in a future docket) the spending found to be prudent,” said the June 29 application. “These are the same approvals which the Commission gave to Public Service Company of Colorado in connection with PSCo’s CACJA-related Application for Authorization to Decommission Cherokee Units 1 and 2, filed in Docket No. 11A-303E.”

Black Hills Energy is a unit of Black Hills Corp. (NYSE: BKH).

About Barry Cassell 20414 Articles
Barry Cassell is Chief Analyst for GenerationHub covering coal and emission controls issues, projects and policy. He has covered the coal and power generation industry for more than 24 years, beginning in November 2011 at GenerationHub and prior to that as editor of SNL Energy’s Coal Report. He was formerly with Coal Outlook for 15 years as the publication’s editor and contributing writer, and prior to that he was editor of Coal & Synfuels Technology and associate editor of The Energy Report. He has a bachelor’s degree from Central Michigan University.