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46.1 MW Waste Coal operating in Rosebud, MT — NorthWestern Energy (NWMT)
46.1 MW
Nameplate Capacity
1
Generators
unit
Conventional Steam Coal
Technology
1990
Operating Since
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Colstrip Energy LP | Colstrip Energy | — |
| Owner(s) | Colstrip Energy LP | Rosebud Energy | — |
| Status | Operating | — | — |
Colstrip Energy LP is a 46.1 MW coal-fired power plant located in Rosebud County, Montana. The plant began operating in 1990 and has one generator utilizing conventional steam coal technology. It is owned by Rosebud Energy and operated by Colstrip Energy LP. The plant is the largest of its kind in Montana, and ranks 13th out of 14 similar plants nationally.
The plant operates within the Western Electricity Coordinating Council (WECC) NERC region and is under the balancing authority of NorthWestern Energy (NWMT). In the most recent year with available data, Colstrip Energy LP generated 287,519 MWh of electricity, achieving a capacity factor of 71.0%.
Generated from EIA, GEM, and public data sources
Grid Region
Mountain West
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
21.4K MWh
Latest Month
287.5K MWh
Annual Generation
71.0%
Capacity Factor
CO₂ Intensity
2922 lb/MWh
NOx
5 lb/MWh
SO₂
This plant's balancing authority participates in CAISO's Western Energy Imbalance Market (WEIM). Direct nodal pricing data is not yet available.
Last updated 2026-03-26
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ask pi about Colstrip Energy LPNorthWestern Energy (NWMT) (NWMT)
Grid Voltage
115.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
8 lb/MWh
CH₄
0.336 lb/MWh
N₂O
0.049 lb/MWh
Capacity Factor
75.8%
Annual Net Gen
306 GWh
CO₂eq
2944 lb/MWh
Subregion
WECC Northwest