Swan Falls
Ada County, Idaho · EIA plant ID 819 · Operator: Idaho Power Co
Nameplate27MWSummer 29 MW
Generators2in service
Net generation110GWh12 mo to Dec 2025
Capacity factor23%hydro units, summer MW
Heat rate—thermal plants only
First online1994
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 | 118.7 | 54.2% | — |
| 2002 | 112.9 | 51.6% | — |
| 2003 | 110.5 | 74.2% | — |
| 2004 | 113 | 75.7% | — |
| 2005 | 119.9 | 80.5% | — |
| 2006 | 133.5 | 89.7% | — |
| 2007 | 117.8 | 79.1% | — |
| 2008 | 115 | 77.0% | — |
| 2009 | 131.6 | 51.1% | — |
| 2010 | 124.6 | 48.4% | — |
| 2011 | 157.9 | 61.3% | — |
| 2012 | 127.3 | 49.3% | — |
| 2013 | 108.1 | 42.0% | — |
| 2014 | 110.8 | 43.0% | — |
| 2015 | 110.8 | 43.0% | — |
| 2016 | 112.7 | 43.6% | — |
| 2017 | 130.2 | 50.5% | — |
| 2018 | 123.7 | 48.0% | — |
| 2019 | 134.3 | 52.2% | — |
| 2020 | 119.9 | 46.5% | — |
| 2021 | 107.8 | 44.1% | — |
| 2022 | 106.7 | 41.1% | — |
| 2023 | 113 | 43.9% | — |
| 2024 | 121.9 | 59.0% | — |
| 2025 | 110 | 43.9% | — |
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 | 13.6 | 15 | Mar 1994 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 13.6 | 13.6 | May 1994 | Operating | — | coming soon |
| P1 | Conventional Hydroelectric | HY | 12.5 | 12.5 | Mar 1994 | not_current | — | coming soon |
| P2 | Conventional Hydroelectric | HY | 12.5 | 12.5 | May 1994 | not_current | — | coming soon |
Owner / operator
Operator: Idaho Power Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Idaho Power Co | 100.0% | 27 MW |
Nearby plants
Within 80 km.
| Murphy Flat Solar | 20 MW | 5.9 km |
| Melba BESS | 2 MW | 20.5 km |
| ID Solar | 40 MW | 22.6 km |
| Mora Drop Hydroelectric Project | 2 MW | 25.2 km |
| Hemmingway BESS | 166 MW | 25.9 km |
| Orchard Ranch Solar | 20 MW | 26 km |