Shoshone Falls
Jerome County, Idaho · EIA plant ID 818 · Operator: Idaho Power Co
Nameplate15MWSummer 16 MW
Generators2in service
Net generation52GWh12 mo to Dec 2025
Capacity factor37%hydro units, summer MW
Heat rate—thermal plants only
First online1921
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 | 90.8 | 82.9% | — |
| 2002 | 84.5 | 77.1% | — |
| 2003 | 82.8 | 78.8% | — |
| 2004 | 81.1 | 76.9% | — |
| 2005 | 82.7 | 78.7% | — |
| 2006 | 99 | 94.2% | — |
| 2007 | 55.6 | 52.9% | — |
| 2008 | 47.7 | 45.2% | — |
| 2009 | 99.8 | 82.0% | — |
| 2010 | 91.7 | 75.3% | — |
| 2011 | 110.4 | 90.7% | — |
| 2012 | 65.9 | 54.0% | — |
| 2013 | 65 | 53.4% | — |
| 2014 | 42.9 | 35.3% | — |
| 2015 | 74.6 | 61.3% | — |
| 2016 | 54.8 | 44.8% | — |
| 2017 | 93.5 | 77.3% | — |
| 2018 | 82.8 | 73.8% | — |
| 2019 | 22 | 19.6% | — |
| 2020 | 52.5 | 43.1% | — |
| 2021 | 53.5 | 179.5% | — |
| 2022 | 41.1 | 30.9% | — |
| 2023 | 42.3 | 31.0% | — |
| 2024 | 71.3 | 52.8% | — |
| 2025 | 51.9 | 37.0% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 3 | Conventional Hydroelectric | HY | 11.5 | 12.7 | Aug 1921 | Operating | — | coming soon |
| 4 | Conventional Hydroelectric | HY | 3.2 | 3.3 | Sep 2020 | Operating | — | coming soon |
| 1 | Conventional Hydroelectric | HY | 0.6 | — | Jun 1909 | Retired Dec 2017 | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 0.4 | — | Aug 1907 | Retired Dec 2017 | — | 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% | 15 MW |
Nearby plants
Within 80 km.
| Twin Falls (ID) | 53 MW | 4 km |
| Clif Bar Bakery of Twin Falls | 2 MW | 6.3 km |
| Amalgamated Sugar Twin Falls | 13 MW | 7.6 km |
| Crystal Springs | 2 MW | 8.5 km |
| Rock Creek II | 2 MW | 10.8 km |
| Rock Creek I | 2 MW | 11.7 km |