Yellowstone Energy LP
Petroleum coke power plant in Yellowstone County, Montana. 68 MW of nameplate capacity across 1 generator, operated by Yellowstone Energy LP.
Also known as Yellowstone Energy · EIA plant 50931
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Key facts
- Capacity
- 68 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- June 1995First generator online
- Operator
- Yellowstone Energy LPEIA operator ID 21773
- Grid
- NWMTBalancing authority NWMT
- Price nodes
- None linkedNo verified ISO node
- Location
- Yellowstone County, MT45.8117, −108.4278
- EIA plant ID
- 50931EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Yellowstone Energy LP produces
Free · EIA-923Net generation, 2025
458 GWh
458,357 MWh, final
Capacity factor, 2025
76.9%
2024: 63.9%
January to July 2026
218 GWh
Provisional
Range, 2015 to 2025
381.8–500.1
GWh a year. Low 2024, high 2015
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 441,280 | Not reported | 12 of 12 |
| 2001 | 425,959 | Not reported | 12 of 12 |
| 2002 | 348,123 | Not reported | 12 of 12 |
| 2003 | 378,065 | Not reported | 12 of 12 |
| 2004 | 433,670 | Not reported | 12 of 12 |
| 2005 | 412,466 | Not reported | 12 of 12 |
| 2006 | 408,031 | Not reported | 12 of 12 |
| 2007 | 481,724 | Not reported | 12 of 12 |
| 2008 | 404,942 | Not reported | 12 of 12 |
| 2009 | 479,335 | Not reported | 12 of 12 |
| 2010 | 397,527 | 69.8% | 12 of 12 |
| 2011 | 444,292 | 78.0% | 12 of 12 |
| 2012 | 454,794 | Not reported | 12 of 12 |
| 2013 | 448,668 | 75.3% | 12 of 12 |
| 2014 | 404,660 | 67.9% | 12 of 12 |
| 2015 | 500,087 | 84.0% | 12 of 12 |
| 2016 | 452,014 | 75.7% | 12 of 12 |
| 2017 | 459,443 | 77.1% | 12 of 12 |
| 2018 | 442,910 | 74.4% | 12 of 12 |
| 2019 | 459,719 | 77.2% | 12 of 12 |
| 2020 | 459,339 | 76.9% | 12 of 12 |
| 2021 | 454,274 | 76.3% | 12 of 12 |
| 2022 | 459,078 | 77.1% | 12 of 12 |
| 2023 | 490,760 | 82.4% | 12 of 12 |
| 2024 | 381,832 | 63.9% | 12 of 12 |
| 2025 | 458,357 | 76.9% | 12 of 12 |
| 2026 (provisional, partial year) | 217,612 | 62.9% | 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 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 |
|---|---|---|---|
| GEN1 | Petroleum Coke | 68.0 | June 1995 |
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 Yellowstone Energy LP 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 Yellowstone Energy LP
How much power does Yellowstone Energy LP produce?
Yellowstone Energy LP reported 458,357 MWh (458 GWh) of net generation in 2025, a 76.9% capacity factor on 68 MW of nameplate capacity. From January to July 2026 it reported 218 GWh, which is provisional.
Where is Yellowstone Energy LP?
Yellowstone Energy LP is in Yellowstone County, Montana, at 45.8117, −108.4278. It is in the NorthWestern Energy (NWMT) balancing area (NWMT).
Who operates Yellowstone Energy LP?
EIA-860M for August 2026 lists Yellowstone Energy LP as the operator (EIA operator ID 21773). The operator is not always the owner.
When did Yellowstone Energy LP start operating?
Its first generator began operating in June 1995, 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)
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page