Hardin Generating Station

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This article is part of the Coal Issues portal on SourceWatch, a project of Global Energy Monitor and the Center for Media and Democracy. See here for help on adding material to CoalSwarm.

The Hardin Generating Station is a 116-megawatt (MW) coal-fired power station in Big Horn, Montana.

In November 2017 owner Heorot Power said if the company can't find a buyer for the facility, it could close by the first or second quarter of 2018, as the plant has suffered economic losses since 2014.[1] In May 2018 it was reported the plant may be acquired by blockchain and data processing interests for their power use.[2]


The plant is located in southern Montana, on the northern outskirts of Hardin.

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Rocky Mountain Power is the local entity that owns the plant. It's operated by Colorado Energy, which is owned by Heorot Power, a subsidiary of Beowulf Energy.[3] Rocky Mountain Power had the rights rights to construct the plant and was taken over by Centennial Power in March 2002.[4]

The plant was built and is being operated by Colorado Energy Management, which is also a subsidiary of Centennial Power. (Both Centennial Power and Colorado Energy Management were part of the MDU Resources Group until they were bought by Bicent in July 2007.)[5]

Montana Environmental Information Center appealed the air permit and in May 2005 settled with the company for installation of mercury controls.[6]

Project Details

Sponsor: Heorot Power
Parent company: Beowulf Energy
Location: Hardin, Big Horn, Montana
Capacity: 116 MW
Type: Subcritical
Status: Operating (April 2006)
Coal supply: Absaloka Coal Mine


Citizen groups



  1. "Owners of Hardin coal-fired power plant announce exit in 2018," Billings Gazette, Nov 17, 2017
  2. "Blockchain and data processing interests could take over Hardin’s troubled coal-fired power plant," Crypto Ventures, May 31, 2018
  3. "Hardin Generating Station", Colorado Energy Management, undated, accessed January 2008.
  4. "MDU Resources Creates New Business Unit", Media Release, Business Wire, February 5, 2003.
  5. "Bicent Power Completes Acquisition of Centennial Power and Colorado Energy Management From MDU Resources", Media Release, Chron.com, July 10, 2007.
  6. Clair Johnson, "Hardin plant foes, backer reach pact", Billings Gazette, May 4, 2005.

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