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Colstrip
1.6 GW coal power plant · Rosebud County, Montana
- Operating capacity
- 1.6 GW
- 2 generators
- Main fuel
- Coal
- First unit online
- 1984
- Generation, 2023
- 10.8 TWh
Plant details
- EIA plant ID
- 6076
- Operator
- Talen Montana LLC
- Sector
- IPP Non-CHP
- County
- Rosebud County
- Balancing authority
- NWMT
- Location
- 45.8831, -106.6140
Operating generators
Nameplate capacity and the month each began operating
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| Generator | Fuel | Capacity | Online | Status |
|---|---|---|---|---|
| 3Conventional Steam Coal | Coal | 824 MW | Jan 1984 | Operating |
| 4Conventional Steam Coal | Coal | 824 MW | Apr 1986 | Operating |
Retired generators
Retired since 2010
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| Generator | Fuel | Capacity | Retired | Status |
|---|---|---|---|---|
| 1Conventional Steam Coal | Coal | 358 MW | Retired Jan 2020 | Retired |
| 2Conventional Steam Coal | Coal | 358 MW | Retired Jan 2020 | Retired |
Generation and emissions, 2023
EPA eGRID annual data
- Net generation
- 10.8 TWh
- Capacity factor
- 75.0%
- CO2 emissions
- 12.0 million tons
- CO2 emission rate
- 2,217 lb/MWh
Nearby power plants
Within 25 miles
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| Plant | Fuel | Capacity | Distance |
|---|---|---|---|
| Colstrip Energy LP | Coal | 46.1 MW | 6.7 mi |
Frequently asked questions
- How much power can Colstrip produce?
- Colstrip has 1.6 GW of operating nameplate capacity across 2 generators as of August 2026.
- Who operates Colstrip?
- EIA lists Talen Montana LLC as the operator of Colstrip.
- How much electricity did Colstrip generate?
- Colstrip reported 10.8 TWh of net generation in 2023 and 12.0 million tons of carbon dioxide emissions, according to EPA eGRID.
Source: U.S. Energy Information Administration, Form EIA-860M (August 2026); U.S. EPA eGRID2023 · Data for August 2026