Noxon Rapids
Sanders County, Montana · EIA plant ID 2199 · Operator: Avista Corp
Nameplate488MWSummer 581 MW
Generators5in service
Net generation1,362GWh12 mo to Dec 2025
Capacity factor27%hydro units, summer MW
Heat rate—thermal plants only
First online1959
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 | 1,020.7 | 22.1% | — |
| 2002 | 1,816.5 | 39.4% | — |
| 2003 | 1,542.7 | 32.8% | — |
| 2004 | 1,595.4 | 34.0% | — |
| 2005 | 1,588.6 | 33.9% | — |
| 2006 | 1,823.9 | 38.9% | — |
| 2007 | 1,590.5 | 33.4% | — |
| 2008 | 1,696.5 | 35.2% | — |
| 2009 | 1,673.3 | 34.5% | — |
| 2010 | 1,503.1 | 30.2% | — |
| 2011 | 2,109.7 | 42.0% | — |
| 2012 | 1,823 | 35.8% | — |
| 2013 | 1,581.2 | 31.1% | — |
| 2014 | 1,968.1 | 38.7% | — |
| 2015 | 1,635.1 | 32.1% | — |
| 2016 | 1,695.6 | 33.3% | — |
| 2017 | 1,866.1 | 36.7% | — |
| 2018 | 1,840.6 | 36.2% | — |
| 2019 | 1,573.5 | 30.9% | — |
| 2020 | 1,596.5 | 31.3% | — |
| 2021 | 1,569 | 30.8% | — |
| 2022 | 1,741.3 | 34.2% | — |
| 2023 | 1,304.3 | 25.6% | — |
| 2024 | 1,324.3 | 26.0% | — |
| 2025 | 1,362.1 | 26.8% | — |
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 | 99 | 113.9 | Sep 1959 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 76.8 | 105 | Oct 1959 | Operating | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 99 | 113.9 | Dec 1959 | Operating | — | coming soon |
| 4 | Conventional Hydroelectric | HY | 99 | 113.9 | Apr 1960 | Operating | — | coming soon |
| 5 | Conventional Hydroelectric | HY | 114 | 134 | Dec 1977 | Operating | — | coming soon |
Owner / operator
Operator: Avista Corp. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Avista Corp | 100.0% | 488 MW |
Nearby plants
Within 80 km.
| Cabinet Gorge | 265 MW | 27.5 km |
| Thompson Falls | 98 MW | 49.5 km |
| Libby | 525 MW | 58.8 km |