Cheyenne Prairie Generating Station
Natural gas power plant in Laramie County, Wyoming. 140 MW of nameplate capacity across 4 generators, operated by Black Hills Service Company LLC.
Also known as EIA plant 57703
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 140 MWNameplate
- Generators
- 4 operatingEIA-860M, August 2026
- Operating since
- October 2014First generator online
- Operator
- Black Hills Service Company LLCEIA operator ID 56771
- Grid
- WACMBalancing authority WACM
- Price nodes
- None linkedNo verified ISO node
- Location
- Laramie County, WY41.1236, −104.7200
- EIA plant ID
- 57703EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Cheyenne Prairie produces
Free · EIA-923Net generation, 2025
502 GWh
501,703 MWh, final
Capacity factor, 2025
40.9%
2024: 38.1%
January to July 2026
266 GWh
Provisional
Range, 2015 to 2025
108.9–501.7
GWh a year. Low 2015, high 2025
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | Not reported | Not reported | 0 of 12 |
| 2006 | Not reported | Not reported | 0 of 12 |
| 2007 | Not reported | Not reported | 0 of 12 |
| 2008 | Not reported | Not reported | 0 of 12 |
| 2009 | Not reported | Not reported | 0 of 12 |
| 2010 | Not reported | Not reported | 0 of 12 |
| 2011 | Not reported | Not reported | 0 of 12 |
| 2012 | Not reported | Not reported | 0 of 12 |
| 2013 | Not reported | Not reported | 0 of 12 |
| 2014 | 38,097 | Not reported | 3 of 12 |
| 2015 | 108,864 | 8.9% | 12 of 12 |
| 2016 | 162,365 | 13.2% | 12 of 12 |
| 2017 | 124,271 | 10.1% | 12 of 12 |
| 2018 | 187,201 | 15.3% | 12 of 12 |
| 2019 | 313,140 | 25.5% | 12 of 12 |
| 2020 | 354,298 | 28.8% | 12 of 12 |
| 2021 | 364,840 | 29.7% | 12 of 12 |
| 2022 | 282,814 | 23.1% | 12 of 12 |
| 2023 | 421,871 | 34.4% | 12 of 12 |
| 2024 | 430,153 | 38.1% | 11 of 12 |
| 2025 | 501,703 | 40.9% | 12 of 12 |
| 2026 (provisional, partial year) | 266,257 | 37.4% | 7 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDCO₂, 2025
227,618
US short tons. 2024: 216,227
SO₂, 2025
1
US short tons
NOx, 2025
16
US short tons
CO₂ per MWh, calculated
0.45 t
About 907 lb per MWh
3 of 3 EPA units reported CO₂ in 2025 (CT01, CT02, CT03), matched to EIA plant 57703 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 01A | Natural Gas Fired Combined Cycle | 40.0 | October 2014 |
| 01B | Natural Gas Fired Combined Cycle | 40.0 | October 2014 |
| 01C | Natural Gas Fired Combined Cycle | 20.0 | October 2014 |
| 02A | Natural Gas Fired Combustion Turbine | 40.0 | October 2014 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Black Hills Service Company LLC as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Power plants near Cheyenne Prairie
More plants operated by Black Hills Service Company LLC
Questions about Cheyenne Prairie
How much power does Cheyenne Prairie Generating Station produce?
Cheyenne Prairie Generating Station reported 501,703 MWh (502 GWh) of net generation in 2025, a 40.9% capacity factor on 140 MW of nameplate capacity. From January to July 2026 it reported 266 GWh, which is provisional.
Where is Cheyenne Prairie Generating Station?
Cheyenne Prairie Generating Station is in Laramie County, Wyoming, at 41.1236, −104.7200. It is in the Western Area Power Administration - Rocky Mountain Region balancing area (WACM).
Who operates Cheyenne Prairie Generating Station?
EIA-860M for August 2026 lists Black Hills Service Company LLC as the operator (EIA operator ID 56771). The operator is not always the owner.
When did Cheyenne Prairie Generating Station start operating?
Its first generator began operating in October 2014, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page