Stillwater Wind, LLC — Plant Summary
- EIA Plant ID
- 61858
- Capacity
- 79.7 MW
- Primary Fuel
- Wind
- Technology
- Onshore Wind Turbine
- Status
- Operating
- Location
- Stillwater, MT
- Operating Since
- 2018
- Generators
- 1
- Operator
- Pattern Operators LP
- Parent Company
- —
- Annual Generation
- 252,726 MWh
- Capacity Factor
- 36.2%
- Balancing Authority
- NorthWestern Energy (NWMT)
- ISO/RTO
- —
- NERC Region
- WECC
Stillwater Wind, LLC
OperatingWind
Ranked #14 of 25 Wind plants in MT#827 of 1442 nationally
79.7 MW Wind operating in Stillwater, MT — NorthWestern Energy (NWMT)
EIAGEMWD
79.7 MW
Nameplate Capacity
1
Generators
unit
Onshore Wind Turbine
Technology
2018
Operating Since
Location
Coordinates
45.8747, -109.4987
County
Stillwater, MT
Nearby Plants
- Beaver Creek Wind FacilityWind248 MW · 9.0 km
- Big Timber Wind FarmWind25 MW · 12.5 km
- BendHydro1.1 MW · 19.7 km
Ownership & Operator
Owner data does not fully agree across sources.
EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Pattern Operators LP | Pattern Energy | — |
| Owner(s) | Pattern Operators LP | Pattern Energy [100%] | — |
| Status | Operating | operating | — |
Ownership Chain
GEM identifies the owner as Pattern Energy [100%]
This entity is not yet in the GEM ownership database — chain unavailable.
About
Stillwater Wind, LLC is a 79.7 MW wind power plant located in Stillwater County, Montana. The plant began operating in 2018 and is owned and operated by Pattern Operators LP. The facility consists of a single generator utilizing onshore wind turbine technology. It is interconnected to the NorthWestern Energy (NWMT) balancing authority within the Western Electricity Coordinating Council (WECC) NERC region.
The plant's wind turbines have a hub height of 85 meters and a rotor diameter of 120 meters. The turbines were manufactured by Siemens Gamesa Renewable Energy, model SG-2.625-120. In its latest year of reported generation, Stillwater Wind produced 252,726 MWh of electricity, achieving a capacity factor of 36.2%. Stillwater Wind ranks as the 14th largest of 25 wind plants in Montana, and 818th nationally out of 1424 wind plants.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
NorthWestern Energy (NWMT)
Grid Voltage
161 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
34.4K MWh
Latest Month
252.7K MWh
Annual Generation
36.2%
Capacity Factor
Jan 2023 – Dec 2025
Financial Data
No financial data available for this plant.
Pricing & Market Data
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
News & Articles (10)Beta
Deals·project finance
Red Rocket force majeure claim rejected as 108MW Witberg Wind Farm faces financial strain
R2.4 billion Witberg Wind Farm faces mounting financial pressure after Sibanye Stillwater rejects force majeure claim by Red Rocket.
Witberg Wind Farm (operator)Sibanye Stillwater (other)
Green Building Africa·2 weeks ago
Industry·corporate
Here's where to expect a potential Yellowstone County data center
In 2024, Montana Property LLC purchased 20 parcels — or eight square miles — of arid, agricultural land south of Broadview in Yellowstone...
Montana Property LLC (buyer)Yellowstone County (other)
WV News·2 months ago
Regulatory·state puc
WA's coal ban comes at steep cost
STILLWATER COUNTY, Mont. — Near a dusty road over rolling hills, clouds hung low above the jagged peaks of the Beartooth Mountains just...
The Seattle Times·3 months ago
Industry·corporate
Stillwater County banks on wind power as a new 'golden goose'
Wind farms are facing strong opposition in much of southeastern Montana, but Stillwater County is welcoming wind power with open arms.
Stillwater County (other)
Montana Public Radio·4 months ago
Last updated 2026-03-14
View all 10 articles