Stillwater Energy Center
Natural gas power plant in Payne County, Oklahoma. 56.4 MW of nameplate capacity across 3 generators, operated by Stillwater Utilities Authority.
Also known as EIA plant 59647
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Key facts
- Capacity
- 56.4 MWNameplate
- Generators
- 3 operatingEIA-860M, August 2026
- Operating since
- July 2016First generator online
- Operator
- Stillwater Utilities AuthorityEIA operator ID 18125
- Grid
- SPPBalancing authority SWPP
- Price nodes
- 3 SPP nodesResource nodes with prices
- Location
- Payne County, OK36.1619, −97.0369
- EIA plant ID
- 59647EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Stillwater produces
Free · EIA-923Net generation, 2025
108 GWh
107,711 MWh, final
Capacity factor, 2025
21.8%
2024: 28.0%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2017 to 2025
30.6–138.8
GWh a year. Low 2020, high 2024
| 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 | Not reported | Not reported | 0 of 12 |
| 2015 | Not reported | Not reported | 0 of 12 |
| 2016 | 32,831 | Not reported | 6 of 12 |
| 2017 | 47,454 | 9.6% | 12 of 12 |
| 2018 | 34,473 | 7.0% | 12 of 12 |
| 2019 | 44,132 | 8.9% | 12 of 12 |
| 2020 | 30,562 | 6.2% | 12 of 12 |
| 2021 | 75,897 | 15.4% | 12 of 12 |
| 2022 | 136,553 | 27.6% | 12 of 12 |
| 2023 | 88,395 | 17.9% | 12 of 12 |
| 2024 | 138,836 | 28.0% | 12 of 12 |
| 2025 | 107,711 | 21.8% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 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 CAMPDNo EPA emissions units are linked to this plant.
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 |
|---|---|---|---|
| 1 | Natural Gas Internal Combustion Engine | 18.8 | July 2016 |
| 2 | Natural Gas Internal Combustion Engine | 18.8 | July 2016 |
| 3 | Natural Gas Internal Combustion Engine | 18.8 | July 2016 |
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 Stillwater Utilities Authority 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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Questions about Stillwater
How much power does Stillwater Energy Center produce?
Stillwater Energy Center reported 107,711 MWh (108 GWh) of net generation in 2025, a 21.8% capacity factor on 56.4 MW of nameplate capacity.
Where is Stillwater Energy Center?
Stillwater Energy Center is in Payne County, Oklahoma, at 36.1619, −97.0369. It is in the Southwest Power Pool balancing area (SWPP).
Who operates Stillwater Energy Center?
EIA-860M for August 2026 lists Stillwater Utilities Authority as the operator (EIA operator ID 18125). The operator is not always the owner.
When did Stillwater Energy Center start operating?
Its first generator began operating in July 2016, according to EIA-860M.
Does InfraMap have power prices for Stillwater Energy Center?
Yes. InfraMap has SPP day-ahead and real-time prices at 3 price nodes linked to Stillwater Energy Center, 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)
- 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