Ryan
Cascade County, Montana · EIA plant ID 2194 · Operator: NorthWestern Energy
Nameplate55MWSummer 72 MW
Generators6in service
Net generation377GWh12 mo to Dec 2025
Capacity factor60%hydro units, summer MW
Heat rate—thermal plants only
First online1915
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 | 334 | 83.6% | — |
| 2002 | 350.5 | 66.7% | — |
| 2003 | 347.5 | 82.7% | — |
| 2004 | 364.2 | 86.4% | — |
| 2005 | 405.7 | 96.5% | — |
| 2006 | 411 | 97.8% | — |
| 2007 | 384.5 | 91.5% | — |
| 2008 | 390.6 | 74.1% | — |
| 2009 | 441.4 | 84.0% | — |
| 2010 | 423.2 | 80.5% | — |
| 2011 | 440.5 | 83.8% | — |
| 2012 | 390.5 | 74.1% | — |
| 2013 | 395.4 | 75.2% | — |
| 2014 | 469 | 89.2% | — |
| 2015 | 447.9 | 85.2% | — |
| 2016 | 414 | 78.5% | — |
| 2017 | 423.2 | 76.7% | — |
| 2018 | 470.7 | 79.6% | — |
| 2019 | 484.1 | 79.5% | — |
| 2020 | 459 | 73.1% | — |
| 2021 | 384.5 | 61.4% | — |
| 2022 | 397.4 | 63.4% | — |
| 2023 | 486.3 | 77.6% | — |
| 2024 | 434.6 | 69.2% | — |
| 2025 | 377.3 | 60.2% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| RYA1 | Conventional Hydroelectric | HY | 9.2 | 12 | Aug 1915 | Operating | — | coming soon |
| RYA2 | Conventional Hydroelectric | HY | 9.2 | 12 | Aug 1915 | Operating | — | coming soon |
| RYA3 | Conventional Hydroelectric | HY | 9.2 | 12 | Aug 1915 | Operating | — | coming soon |
| RYA4 | Conventional Hydroelectric | HY | 9.2 | 12 | Aug 1915 | Operating | — | coming soon |
| RYA5 | Conventional Hydroelectric | HY | 9.2 | 11.5 | Sep 1916 | Operating | — | coming soon |
| RYA6 | Conventional Hydroelectric | HY | 9.2 | 12 | Sep 1916 | Operating | — | coming soon |
Owner / operator
Operator: NorthWestern Energy. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| NorthWestern Energy | 100.0% | 55 MW |
Nearby plants
Within 80 km.
| Morony | 63 MW | 4.8 km |
| Cochrane | 59 MW | 6.5 km |
| Rainbow (MT) | 59 MW | 7.3 km |
| Black Eagle Solar, LLC | 3 MW | 10.2 km |
| Black Eagle | 27 MW | 11.7 km |
| Horseshoe Bend Wind Park | 10 MW | 25.1 km |