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
NERC Region
WECC
Balancing Authority
NorthWestern Energy (NWMT)
Grid Voltage
115 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
21.4K MWh
Latest Month
287.5K MWh
Annual Generation
71.0%
Capacity Factor
No financial data available for this plant.
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
Last updated 2026-03-26
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