Wygen 1
Coal power plant in Campbell County, Wyoming. 90 MW of nameplate capacity across 1 generator, operated by Black Hills Ontario LLC.
Also known as EIA plant 55479
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 90 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- January 2003First generator online
- Operator
- Black Hills Ontario LLCEIA operator ID 19545
- Grid
- WACMBalancing authority WACM
- Price nodes
- 1 SPP nodeResource nodes with prices
- Location
- Campbell County, WY44.2858, −105.3833
- EIA plant ID
- 55479EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Wygen 1 produces
Free · EIA-923Net generation, 2025
539 GWh
538,741 MWh, final
Capacity factor, 2025
68.3%
2024: 70.4%
January to July 2026
335 GWh
Provisional
Range, 2015 to 2025
521.5–734.6
GWh a year. Low 2021, high 2015
| 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 | 616,768 | Not reported | 12 of 12 |
| 2004 | 740,591 | Not reported | 12 of 12 |
| 2005 | 709,117 | Not reported | 12 of 12 |
| 2006 | 714,791 | Not reported | 12 of 12 |
| 2007 | 705,444 | Not reported | 12 of 12 |
| 2008 | 702,558 | Not reported | 12 of 12 |
| 2009 | 719,103 | Not reported | 12 of 12 |
| 2010 | 639,854 | 83.0% | 12 of 12 |
| 2011 | 719,737 | Not reported | 12 of 12 |
| 2012 | 684,671 | Not reported | 12 of 12 |
| 2013 | 705,252 | 91.5% | 12 of 12 |
| 2014 | 705,406 | 91.5% | 12 of 12 |
| 2015 | 734,553 | Not reported | 12 of 12 |
| 2016 | 710,524 | 89.9% | 12 of 12 |
| 2017 | 721,780 | 91.5% | 12 of 12 |
| 2018 | 639,452 | 81.1% | 12 of 12 |
| 2019 | 703,377 | 89.2% | 12 of 12 |
| 2020 | 699,014 | 88.4% | 12 of 12 |
| 2021 | 521,516 | 66.1% | 12 of 12 |
| 2022 | 688,614 | 87.3% | 12 of 12 |
| 2023 | 643,236 | 81.6% | 12 of 12 |
| 2024 | 556,443 | 70.4% | 12 of 12 |
| 2025 | 538,741 | 68.3% | 12 of 12 |
| 2026 (provisional, partial year) | 334,876 | 73.1% | 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 account · SPPEmissions
Free · EPA CAMPDCO₂, 2025
734,315
US short tons. 2024: 746,808
SO₂, 2025
275
US short tons
NOx, 2025
450
US short tons
CO₂ per MWh, calculated
1.36 t
About 2,726 lb per MWh
1 of 1 EPA units reported CO₂ in 2025 (1), matched to EIA plant 55479 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 |
|---|---|---|---|
| 0001 | Conventional Steam Coal | 90.0 | January 2003 |
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 Ontario 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 Wygen 1
Questions about Wygen 1
How much power does Wygen 1 produce?
Wygen 1 reported 538,741 MWh (539 GWh) of net generation in 2025, a 68.3% capacity factor on 90 MW of nameplate capacity. From January to July 2026 it reported 335 GWh, which is provisional.
Where is Wygen 1?
Wygen 1 is in Campbell County, Wyoming, at 44.2858, −105.3833. It is in the Western Area Power Administration - Rocky Mountain Region balancing area (WACM).
Who operates Wygen 1?
EIA-860M for August 2026 lists Black Hills Ontario LLC as the operator (EIA operator ID 19545). The operator is not always the owner.
When did Wygen 1 start operating?
Its first generator began operating in January 2003, according to EIA-860M.
Does InfraMap have power prices for Wygen 1?
Yes. InfraMap has SPP day-ahead and real-time prices at 1 price node linked to Wygen 1, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
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
- SPP day-ahead and real-time prices; node and hub assignments as of 2026-10-05
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page