Twin Falls (ID)
Hydro power plant in Twin Falls County, Idaho. 52.7 MW of nameplate capacity across 2 generators, operated by Idaho Power Co.
Also known as EIA plant 821
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 52.7 MWNameplate
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- March 1935First generator online
- Operator
- Idaho Power CoEIA operator ID 9191
- Grid
- IPCOBalancing authority IPCO
- Price nodes
- None linkedNo verified ISO node
- Location
- Twin Falls County, ID42.5892, −114.3553
- EIA plant ID
- 821EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Twin Falls (ID) produces
Free · EIA-923Net generation, 2025
43.5 GWh
43,524 MWh, final
Capacity factor, 2025
9.4%
2024: 21.8%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
22.4–262.0
GWh a year. Low 2022, high 2018
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 185,453 | Not reported | 12 of 12 |
| 2001 | 52,933 | Not reported | 12 of 12 |
| 2002 | 43,131 | Not reported | 12 of 12 |
| 2003 | 35,874 | Not reported | 12 of 12 |
| 2004 | 33,363 | Not reported | 12 of 12 |
| 2005 | 54,446 | Not reported | 12 of 12 |
| 2006 | 150,325 | Not reported | 12 of 12 |
| 2007 | 87,588 | Not reported | 12 of 12 |
| 2008 | 74,045 | Not reported | 12 of 12 |
| 2009 | 171,666 | Not reported | 12 of 12 |
| 2010 | 115,370 | 25.0% | 12 of 12 |
| 2011 | 394,475 | 85.4% | 12 of 12 |
| 2012 | 166,426 | 36.0% | 12 of 12 |
| 2013 | 55,373 | 12.0% | 12 of 12 |
| 2014 | 59,763 | 12.9% | 12 of 12 |
| 2015 | 76,114 | 16.5% | 12 of 12 |
| 2016 | 39,449 | 8.5% | 12 of 12 |
| 2017 | 214,318 | 46.4% | 12 of 12 |
| 2018 | 262,039 | 56.8% | 12 of 12 |
| 2019 | 147,630 | 32.0% | 12 of 12 |
| 2020 | 53,183 | 11.5% | 12 of 12 |
| 2021 | 43,071 | 9.3% | 12 of 12 |
| 2022 | 22,385 | 4.8% | 12 of 12 |
| 2023 | 37,126 | 8.0% | 12 of 12 |
| 2024 | 100,984 | 21.8% | 12 of 12 |
| 2025 | 43,524 | 9.4% | 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 | 8.4 | March 1935 |
| 2 | Conventional Hydroelectric | 44.3 | July 1995 |
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 Twin Falls (ID)
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Questions about Twin Falls (ID)
How much power does Twin Falls (ID) produce?
Twin Falls (ID) reported 43,524 MWh (43.5 GWh) of net generation in 2025, a 9.4% capacity factor on 52.7 MW of nameplate capacity.
Where is Twin Falls (ID)?
Twin Falls (ID) is in Twin Falls County, Idaho, at 42.5892, −114.3553. It is in the Idaho Power Company balancing area (IPCO).
Who operates Twin Falls (ID)?
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 Twin Falls (ID) start operating?
Its first generator began operating in March 1935, 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)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page