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1647.4 MW Sub. Coal operating in Rosebud, MT — NorthWestern Energy (NWMT)
1,647.4 MW
Nameplate Capacity
2
Generators
units
Conventional Steam Coal
Technology
1984
Operating Since
Coordinates
45.8831, -106.6140
County
Rosebud, MT
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Talen Montana LLC | PacifiCorp | — |
| Owner(s) | Avista Corp, NorthWestern Energy (MT Hydro), PacifiCorp, Portland General Electric Co, Puget Sound Energy Inc, Talen Montana LLC | Berkshire Hathaway | — |
| Status | Operating | — | — |
The Colstrip power plant is a 1647.4 MW coal-fired generating station located in Rosebud County, Montana. The plant, which began operating in 1984, utilizes conventional steam coal technology and subbituminous coal (SUB) as its primary fuel. It consists of two generating units. The plant is owned by Berkshire Hathaway and operated by Talen Montana LLC. Colstrip is the largest power plant in Montana and ranks 18th out of 75 coal plants nationally.
In the most recent year of data, Colstrip generated 9,171,195 MWh of electricity, achieving a capacity factor of 63.6%. The plant operates within the NorthWestern Energy (NWMT) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. Financial data indicates an installed cost of $386.95 per kW, based on FERC filings.
Generated from EIA, GEM, and public data sources
Grid Region
Mountain West
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
542.2K MWh
Latest Month
9.2M MWh
Annual Generation
63.6%
Capacity Factor
CO₂ Intensity
2217 lb/MWh
NOx
2 lb/MWh
SO₂
Steam turbine · Puget Sound Energy, Inc. · Data from 2015–2024
$1,450/kW
Installed Cost
$3/kW
Annual CapEx
$37.6/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
This plant's balancing authority participates in CAISO's Western Energy Imbalance Market (WEIM). Direct nodal pricing data is not yet available.
Last updated 2026-03-14
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ask pi about ColstripNorthWestern Energy (NWMT) (NWMT)
Grid Voltage
230.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
0.976 lb/MWh
CH₄
0.261 lb/MWh
N₂O
0.038 lb/MWh
Capacity Factor
75.0%
Annual Net Gen
10820 GWh
CO₂eq
2234 lb/MWh
Subregion
WECC Northwest