Yellowstone County Generating Station
Natural gas power plant in Yellowstone County, Montana. 207 MW of nameplate capacity across 18 generators, operated by NorthWestern Energy (MT wind/thermal).
Also known as EIA plant 67766
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 207 MWNameplate
- Generators
- 18 operatingEIA-860M, August 2026
- Operating since
- July 2024First generator online
- Operator
- NorthWestern Energy (MT wind/thermal)EIA operator ID 56815
- Grid
- NWMTBalancing authority NWMT
- Price nodes
- None linkedNo verified ISO node
- Location
- Yellowstone County, MT45.6599, −108.7608
- EIA plant ID
- 67766EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Yellowstone County produces
Free · EIA-923Net generation, 2025
383 GWh
383,412 MWh, final
Capacity factor, 2025
21.1%
2024: Not reported
January to July 2026
228 GWh
Provisional
| 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 | Not reported | Not reported | 0 of 12 |
| 2017 | Not reported | Not reported | 0 of 12 |
| 2018 | Not reported | Not reported | 0 of 12 |
| 2019 | Not reported | Not reported | 0 of 12 |
| 2020 | Not reported | Not reported | 0 of 12 |
| 2021 | Not reported | Not reported | 0 of 12 |
| 2022 | Not reported | Not reported | 0 of 12 |
| 2023 | Not reported | Not reported | 0 of 12 |
| 2024 | 83,378 | Not reported | 6 of 12 |
| 2025 | 383,412 | 21.1% | 12 of 12 |
| 2026 (provisional, partial year) | 228,205 | 21.7% | 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 |
|---|---|---|---|
| YGS01 | Natural Gas Internal Combustion Engine | 11.5 | July 2024 |
| YGS02 | Natural Gas Internal Combustion Engine | 11.5 | July 2024 |
| YGS03 | Natural Gas Internal Combustion Engine | 11.5 | July 2024 |
| YGS04 | Natural Gas Internal Combustion Engine | 11.5 | July 2024 |
| YGS05 | Natural Gas Internal Combustion Engine | 11.5 | July 2024 |
| YGS06 | Natural Gas Internal Combustion Engine | 11.5 | July 2024 |
| YGS07 | Natural Gas Internal Combustion Engine | 11.5 | July 2024 |
| YGS08 | Natural Gas Internal Combustion Engine | 11.5 | July 2024 |
| YGS09 | Natural Gas Internal Combustion Engine | 11.5 | July 2024 |
| YGS10 | Natural Gas Internal Combustion Engine | 11.5 | July 2024 |
| YGS11 | Natural Gas Internal Combustion Engine | 11.5 | July 2024 |
| YGS12 | Natural Gas Internal Combustion Engine | 11.5 | July 2024 |
| YGS13 | Natural Gas Internal Combustion Engine | 11.5 | July 2024 |
| YGS14 | Natural Gas Internal Combustion Engine | 11.5 | July 2024 |
| YGS15 | Natural Gas Internal Combustion Engine | 11.5 | July 2024 |
| YGS16 | Natural Gas Internal Combustion Engine | 11.5 | July 2024 |
| YGS17 | Natural Gas Internal Combustion Engine | 11.5 | July 2024 |
| YGS18 | Natural Gas Internal Combustion Engine | 11.5 | July 2024 |
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 NorthWestern Energy (MT wind/thermal) 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 Yellowstone County
More plants operated by NorthWestern Energy (MT wind/thermal)
Questions about Yellowstone County
How much power does Yellowstone County Generating Station produce?
Yellowstone County Generating Station reported 383,412 MWh (383 GWh) of net generation in 2025, a 21.1% capacity factor on 207 MW of nameplate capacity. From January to July 2026 it reported 228 GWh, which is provisional.
Where is Yellowstone County Generating Station?
Yellowstone County Generating Station is in Yellowstone County, Montana, at 45.6599, −108.7608. It is in the NorthWestern Energy (NWMT) balancing area (NWMT).
Who operates Yellowstone County Generating Station?
EIA-860M for August 2026 lists NorthWestern Energy (MT wind/thermal) as the operator (EIA operator ID 56815). The operator is not always the owner.
When did Yellowstone County Generating Station start operating?
Its first generator began operating in July 2024, 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)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page