Upper Salmon B
Hydro power plant in Twin Falls County, Idaho. 16.5 MW of nameplate capacity across 2 generators, operated by Idaho Power Co.
Also known as Upper Salmon B Power Station · EIA plant 7079
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 16.5 MWNameplate
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- September 1947First generator online
- Operator
- Idaho Power CoEIA operator ID 9191
- Grid
- IPCOBalancing authority IPCO
- Price nodes
- None linkedNo verified ISO node
- Location
- Twin Falls County, ID42.7664, −114.9082
- EIA plant ID
- 7079EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Upper Salmon B produces
Free · EIA-923Net generation, 2025
89.1 GWh
89,116 MWh, final
Capacity factor, 2025
61.7%
2024: 70.6%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
64.9–124.5
GWh a year. Low 2021, high 2017
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 134,948 | Not reported | 12 of 12 |
| 2001 | 102,265 | Not reported | 12 of 12 |
| 2002 | 92,702 | Not reported | 12 of 12 |
| 2003 | 87,119 | Not reported | 12 of 12 |
| 2004 | 84,230 | Not reported | 12 of 12 |
| 2005 | 93,660 | Not reported | 12 of 12 |
| 2006 | 93,557 | Not reported | 12 of 12 |
| 2007 | 105,444 | Not reported | 12 of 12 |
| 2008 | 98,013 | Not reported | 12 of 12 |
| 2009 | 101,651 | Not reported | 12 of 12 |
| 2010 | 108,094 | 74.8% | 12 of 12 |
| 2011 | 147,300 | 101.9% | 12 of 12 |
| 2012 | 114,888 | 79.3% | 12 of 12 |
| 2013 | 90,602 | 62.7% | 12 of 12 |
| 2014 | 90,972 | 62.9% | 12 of 12 |
| 2015 | 97,207 | 67.3% | 12 of 12 |
| 2016 | 84,782 | 58.5% | 12 of 12 |
| 2017 | 124,505 | 86.1% | 12 of 12 |
| 2018 | 118,876 | 82.2% | 12 of 12 |
| 2019 | 108,134 | 74.8% | 12 of 12 |
| 2020 | 68,659 | 47.4% | 12 of 12 |
| 2021 | 64,880 | 44.9% | 12 of 12 |
| 2022 | 81,428 | 56.3% | 12 of 12 |
| 2023 | 87,832 | 60.8% | 12 of 12 |
| 2024 | 102,286 | 70.6% | 12 of 12 |
| 2025 | 89,116 | 61.7% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Conventional Hydroelectric | 8.2 | September 1947 |
| 2 | Conventional Hydroelectric | 8.3 | September 1947 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Idaho Power Co as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
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Power plants near Upper Salmon B
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Questions about Upper Salmon B
How much power does Upper Salmon B produce?
Upper Salmon B reported 89,116 MWh (89.1 GWh) of net generation in 2025, a 61.7% capacity factor on 16.5 MW of nameplate capacity.
Where is Upper Salmon B?
Upper Salmon B is in Twin Falls County, Idaho, at 42.7664, −114.9082. It is in the Idaho Power Company balancing area (IPCO).
Who operates Upper Salmon B?
EIA-860M for August 2026 lists Idaho Power Co as the operator (EIA operator ID 9191). The operator is not always the owner.
When did Upper Salmon B start operating?
Its first generator began operating in September 1947, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page