Upper Salmon B
Twin Falls County, Idaho · EIA plant ID 7079 · Operator: Idaho Power Co
Nameplate17MWSummer 19 MW
Generators2in service
Net generation89GWh12 mo to Dec 2025
Capacity factor55%hydro units, summer MW
Heat rate—thermal plants only
First online1947
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 | 102.3 | 75.8% | — |
| 2002 | 92.7 | 68.7% | — |
| 2003 | 87.1 | 61.4% | — |
| 2004 | 84.2 | 59.2% | — |
| 2005 | 93.7 | 66.0% | — |
| 2006 | 93.6 | 65.9% | — |
| 2007 | 105.4 | 74.3% | — |
| 2008 | 98 | 68.9% | — |
| 2009 | 101.7 | 67.5% | — |
| 2010 | 108.1 | 71.7% | — |
| 2011 | 147.3 | 97.8% | — |
| 2012 | 114.9 | 76.0% | — |
| 2013 | 90.6 | 60.1% | — |
| 2014 | 91 | 60.4% | — |
| 2015 | 97.2 | 64.5% | — |
| 2016 | 84.8 | 56.1% | — |
| 2017 | 124.5 | 82.6% | — |
| 2018 | 118.9 | 78.9% | — |
| 2019 | 108.1 | 71.8% | — |
| 2020 | 68.7 | 45.4% | — |
| 2021 | 64.9 | 42.1% | — |
| 2022 | 81.4 | 50.5% | — |
| 2023 | 87.8 | 54.8% | — |
| 2024 | 102.3 | 62.0% | — |
| 2025 | 89.1 | 54.9% | — |
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 | 8.2 | 9.3 | Sep 1947 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 8.3 | 9.3 | Sep 1947 | Operating | — | 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% | 17 MW |
Nearby plants
Within 80 km.
| Upper Salmon A | 18 MW | 1.3 km |
| Thousand Springs | 7 MW | 6.5 km |
| Yahoo Creek | 21 MW | 6.6 km |
| Pilgrim Stage Wind Park | 11 MW | 8.1 km |
| Lower Salmon | 60 MW | 8.4 km |
| Tuana Gulch Wind Park | 11 MW | 9.3 km |