Colstrip

Colstrip is a 1,647 MW operating coal power plant in Rosebud County, Montana, operated by Talen Montana LLC.

Plant statusOperating

Planning (completed)
Consented (completed)
Construction (completed)
OperatingNov 1975 (current stage)
ClosedJan 2020 (not yet reached)

This plant has generators at more than one stage; see the table below.

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Generators

Each generating unit EIA lists at this plant.

Unit	Technology	Capacity	Status	Online	Retired / planned retirement
3	Conventional Steam Coal	824 MW	Operating	Jan 1984
4	Conventional Steam Coal	824 MW	Operating	Apr 1986
1	Conventional Steam Coal	358 MW	Retired	Nov 1975	Jan 2020
2	Conventional Steam Coal	358 MW	Retired	Aug 1976	Jan 2020

Plant details

Operator: Talen Montana LLC
Location: Rosebud County, Montana
Balancing authority: NWMT
Sector: IPP Non-CHP
Capacity: Operating: 1,647 MW
Retired: 716 MW
First unit online: Nov 1975
EIA plant ID: 6076

Location

45.8831, -106.6140

Nearby power plants

Colstrip Energy LPCoal power plants · 46.1 MW · 6.7 mi

Source: U.S. Energy Information Administration, Form EIA-860M, September 2026. Planned dates are targets reported by the developer and often change. Report a problem