Stillwater Wind, LLC
Wind power plant in Stillwater County, Montana. 79.7 MW of nameplate capacity across 1 generator, operated by Pattern Operators LP.
Also known as Stillwater Wind · Stillwater Big Sky · EIA plant 61858
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 79.7 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- October 2018First generator online
- Operator
- Pattern Operators LPEIA operator ID 56545
- Grid
- NWMTBalancing authority NWMT
- Price nodes
- None linkedNo verified ISO node
- Location
- Stillwater County, MT45.8658, −109.4766
- EIA plant ID
- 61858EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Stillwater Wind produces
Free · EIA-923Net generation, 2025
253 GWh
252,726 MWh, final
Capacity factor, 2025
36.2%
2024: 39.3%
January to July 2026
169 GWh
Provisional
Range, 2019 to 2025
252.7–307.3
GWh a year. Low 2025, high 2020
| 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 | 70,093 | Not reported | 3 of 12 |
| 2019 | 257,527 | Not reported | 12 of 12 |
| 2020 | 307,316 | 43.9% | 12 of 12 |
| 2021 | 260,107 | 37.3% | 12 of 12 |
| 2022 | 302,563 | 43.3% | 12 of 12 |
| 2023 | 256,730 | 36.8% | 12 of 12 |
| 2024 | 274,800 | 39.3% | 12 of 12 |
| 2025 | 252,726 | 36.2% | 12 of 12 |
| 2026 (provisional, partial year) | 169,270 | 41.7% | 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. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| WT | Onshore Wind Turbine | 79.7 | October 2018 |
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 Pattern Operators LP as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Modeled curtailment
A range, not one number. The lower bound counts hours inside the production tax credit window; the upper bound is the no-credit case.
Expected vs reported generation
Monthly modeled expected output and physical potential next to EIA-923 reported output.
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Power plants near Stillwater Wind
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Questions about Stillwater Wind
How much power does Stillwater Wind, LLC produce?
Stillwater Wind, LLC reported 252,726 MWh (253 GWh) of net generation in 2025, a 36.2% capacity factor on 79.7 MW of nameplate capacity. From January to July 2026 it reported 169 GWh, which is provisional.
Where is Stillwater Wind, LLC?
Stillwater Wind, LLC is in Stillwater County, Montana, at 45.8658, −109.4766. It is in the NorthWestern Energy (NWMT) balancing area (NWMT).
Who operates Stillwater Wind, LLC?
EIA-860M for August 2026 lists Pattern Operators LP as the operator (EIA operator ID 56545). The operator is not always the owner.
When did Stillwater Wind, LLC start operating?
Its first generator began operating in October 2018, 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)
- Project names from the USGS U.S. Wind Turbine Database
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page