Libby
Lincoln County, Montana · EIA plant ID 6172 · Operator: USACE Northwestern Division
Nameplate525MWSummer 525 MW
Generators5in service
Net generation1,608GWh12 mo to Dec 2025
Capacity factor35%hydro units, summer MW
Heat rate—thermal plants only
First online1975
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), hydro 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.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 1,116.1 | 21.1% | — |
| 2002 | 2,256.9 | 42.7% | — |
| 2003 | 1,908.6 | 36.1% | — |
| 2004 | 2,005.9 | 43.5% | — |
| 2005 | 2,355.8 | 51.2% | — |
| 2006 | 2,190.7 | 47.6% | — |
| 2007 | 2,344.2 | 51.0% | — |
| 2008 | 1,950.4 | 42.3% | — |
| 2009 | 1,574.4 | 34.2% | — |
| 2010 | 1,701.9 | 37.0% | — |
| 2011 | 2,450.7 | 53.3% | — |
| 2012 | 2,793.6 | 60.6% | — |
| 2013 | 2,306.1 | 50.1% | — |
| 2014 | 2,513.7 | 54.7% | — |
| 2015 | 1,757.7 | 38.2% | — |
| 2016 | 2,185.5 | 47.4% | — |
| 2017 | 2,281.3 | 49.6% | — |
| 2018 | 2,056.4 | 44.7% | — |
| 2019 | 1,511.4 | 32.9% | — |
| 2020 | 2,310.9 | 50.1% | — |
| 2021 | 1,845.3 | 40.1% | — |
| 2022 | 2,117.9 | 46.1% | — |
| 2023 | 1,581.2 | 34.4% | — |
| 2024 | 1,890.6 | 41.0% | — |
| 2025 | 1,607.9 | 35.0% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | HY | 105 | 105 | Aug 1975 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 105 | 105 | Oct 1975 | Operating (Out of service, expected back within the year) | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 105 | 105 | Jan 1976 | Operating | — | coming soon |
| 4 | Conventional Hydroelectric | HY | 105 | 105 | Apr 1976 | Operating | — | coming soon |
| 5 | Conventional Hydroelectric | HY | 105 | 105 | Sep 1984 | Operating | — | coming soon |
Owner / operator
Operator: USACE Northwestern Division. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| USACE Northwestern Division | 100.0% | 525 MW |
Nearby plants
Within 80 km.
| Noxon Rapids | 488 MW | 58.8 km |
| Cabinet Gorge | 265 MW | 65.6 km |
| Flathead Landfill to Gas Energy Facility | 3 MW | 72.6 km |
| Moyie Springs | 4 MW | 72.9 km |
| Stoltze CoGen1 | 3 MW | 79.3 km |