Colstrip Energy LP
Rosebud County, Montana · EIA plant ID 10784 · Operator: Colstrip Energy LP
Nameplate46MWSummer 38 MW
Generators1in service
Net generation278GWh12 mo to Dec 2025
Capacity factor83%gas/coal/oil units, summer MW
Heat rate14,219Btu/kWhfossil units, electric fuel, HHV
First online1990Runs as baseload
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), gas/coal/oil units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 314.9 | 102.7% | 13,797 |
| 2002 | 173.7 | 56.7% | 14,250 |
| 2003 | 302.4 | 98.6% | 13,895 |
| 2004 | 299 | 97.3% | 13,936 |
| 2005 | 304.9 | 99.5% | 13,886 |
| 2006 | 309.8 | 101.0% | 14,021 |
| 2007 | 303.7 | 99.0% | 14,480 |
| 2008 | 293.3 | 95.4% | 13,849 |
| 2009 | 286.6 | 93.5% | 14,070 |
| 2010 | 330.8 | 107.9% | 13,911 |
| 2011 | 260.8 | 85.0% | 13,808 |
| 2012 | 301.6 | 98.1% | 13,731 |
| 2013 | 326.4 | 106.5% | 13,885 |
| 2014 | 309.5 | 100.9% | 14,051 |
| 2015 | 313.7 | 102.3% | 13,588 |
| 2016 | 313 | 101.8% | 14,215 |
| 2017 | 189.9 | 62.0% | 14,168 |
| 2018 | 327.6 | 98.4% | 13,758 |
| 2019 | 301 | 90.4% | 13,930 |
| 2020 | 272.2 | 81.5% | 14,113 |
| 2021 | 322 | 96.7% | 13,537 |
| 2022 | 291.7 | 87.6% | 14,538 |
| 2023 | 306.2 | 92.0% | 13,876 |
| 2024 | 287.5 | 86.1% | 14,030 |
| 2025 | 277.5 | 83.4% | 14,219 |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| GEN1 | Conventional Steam Coal | ST | 46.1 | 38 | Feb 1990 | Operating | — | coming soon |
Owner / operator
Operator: Colstrip Energy LP. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Colstrip Energy LP | 100.0% | 46 MW |
Nearby plants
Within 80 km.
| Colstrip | 1,647 MW | 10.7 km |
| Hardin Generator Project | 116 MW | 77.1 km |