Hardin Generating Station

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Hardin Generating Station is an operating power station of at least 115-megawatts (MW) in Hardin, Big Horn, Montana, United States.


Table 1: Project-level location details

Plant name Location Coordinates (WGS 84)
Hardin Generating Station Hardin, Big Horn, Montana, United States 45.764342, -107.598292 (exact)

The map below shows the exact location of the power station.

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Unit-level coordinates (WGS 84):

  • Unit 1: 45.764342, -107.598292

Project Details

Table 2: Unit-level details

Unit name Status Fuel(s) Capacity (MW) Technology Start year Retired year
Unit 1 operating coal - subbituminous 115.7 subcritical 2006

Table 3: Unit-level ownership and operator details

Unit name Owner
Unit 1 Heorot Power Management LLC [100.0%]

Use for Cryptocurrency

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]

In February 2019 is was reported that the FERC approved the sale of the power plant to the Big Horn Datapower Holdings.[3] It is unknown at this point what the company's plans are with the facility. According to the EIA 860 database 2018ER the plant is still listed as "Operable"[4] although according to the EIA 923 database there has not been any sale of coal to the plant since December of 2017.[5]


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.[6] Rocky Mountain Power had the rights rights to construct the plant and was taken over by Centennial Power in March 2002.[7]

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.)[8]

Montana Environmental Information Center appealed the air permit and in May 2005 settled with the company for installation of mercury controls.[9]

Citizen groups

Articles and Resources


  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. "FERC approves Rocky Mountain Power's sale of struggling Mont. plant" S&P global, February 20, 2019.
  4. "EIA 860" EIA.gov, 860 generator database
  5. "EIA 923 2017" EIA 923 2017.
  6. "Hardin Generating Station", Colorado Energy Management, undated, accessed January 2008.
  7. "MDU Resources Creates New Business Unit", Media Release, Business Wire, February 5, 2003.
  8. "Bicent Power Completes Acquisition of Centennial Power and Colorado Energy Management From MDU Resources", Media Release, Chron.com, July 10, 2007.
  9. Clair Johnson, "Hardin plant foes, backer reach pact", Billings Gazette, May 4, 2005.

Additional data

To access additional data, including an interactive map of coal-fired power stations, a downloadable dataset, and summary data, please visit the Global Coal Plant Tracker on the Global Energy Monitor website.