Wygen I power station

From Global Energy Monitor

Wygen I power station is a 90.0-megawatt (MW) coal-fired power station owned and operated by Black Hills Corporation near Gillette, Wyoming.


Pictured below is the facility immediately to the southwest of PacifiCorp's Wyodak Power Plant, and immediately to the northwest of Black Hills Corporation's Neil Simpson Power Plants.

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Plant Data

Citizen Activism

MDU Rate Hike Hearing February 10, 2010.wmv

In January 2010, Montana-Dakota Utilities proposed a 25% overall rate hike due to the utility's investment in the plant, Wygen Unit 3, after an initial request of 30%. Citizens, particularly the Powder River Basin Resource Council, opposed the hike, as seen in this video.[4]

In March 2010, MDU announced it had reached a settlement for an increase of 16 percent. The Wyoming Public Service Commission has until June 14 to rule on the settlement. In the price settlement, the parties agreed to stipulations including a lower return on equity of 10.9 percent, special provisions for irrigation customers, and a phased-in increase over three years "to mitigate the rate shock effect on customers," according to the agreement.[4]

Black Hills Power has requested an 11.5 percent return on equity.[4]

Emissions Data

  • CO2 Emissions: 912,154 tons (2006)
  • SO2 Emissions:
  • SO2 Emissions per MWh:
  • NOx Emissions:
  • Mercury Emissions:

Articles and Resources


  1. "Black Hills Corp 2019 Annual Report" blackhillscorp, accessed June 17,2020
  2. "MEAN's Power Supply Portfolio" nmppenergy.org, accessed June 17, 2020
  3. "EIA 923 March 2020" EIA 923 2020.
  4. 4.0 4.1 4.2 Barbara Soderlin,"MDU settles for lower electric rate increase" Rapid City Journal, March 22, 2010.

Related GEM.wiki articles

External Articles