Cassia Gulch
Wind power plant in Twin Falls County, Idaho. 18.9 MW of nameplate capacity across 1 generator, operated by Cassia Gulch Wind Park, LLC.
Also known as Cassia Gulch Wind Park · EIA plant 56935
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 18.9 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- March 2009First generator online
- Operator
- Cassia Gulch Wind Park, LLCEIA operator ID 56157
- Grid
- IPCOBalancing authority IPCO
- Price nodes
- None linkedNo verified ISO node
- Location
- Twin Falls County, ID42.8744, −115.0172
- EIA plant ID
- 56935EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Cassia Gulch produces
Free · EIA-923Net generation, 2025
35.4 GWh
35,441 MWh, final
Capacity factor, 2025
21.4%
2024: 23.8%
January to July 2026
21.6 GWh
Provisional
Range, 2015 to 2025
35.4–43.2
GWh a year. Low 2025, high 2016
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | Not reported | Not reported | 0 of 12 |
| 2006 | Not reported | Not reported | 0 of 12 |
| 2007 | Not reported | Not reported | 0 of 12 |
| 2008 | Not reported | Not reported | 0 of 12 |
| 2009 | 31,305 | Not reported | 12 of 12 |
| 2010 | 45,620 | 27.6% | 12 of 12 |
| 2011 | 44,982 | 27.2% | 12 of 12 |
| 2012 | 45,039 | 27.1% | 12 of 12 |
| 2013 | 43,378 | 26.2% | 12 of 12 |
| 2014 | 45,077 | 27.2% | 12 of 12 |
| 2015 | 35,488 | 21.4% | 12 of 12 |
| 2016 | 43,190 | 26.0% | 12 of 12 |
| 2017 | 38,814 | 23.4% | 12 of 12 |
| 2018 | 43,082 | 26.0% | 12 of 12 |
| 2019 | 40,035 | 24.2% | 12 of 12 |
| 2020 | 41,982 | 25.3% | 12 of 12 |
| 2021 | 41,338 | 25.0% | 12 of 12 |
| 2022 | 37,631 | 22.7% | 12 of 12 |
| 2023 | 37,923 | 22.9% | 12 of 12 |
| 2024 | 39,495 | 23.8% | 12 of 12 |
| 2025 | 35,441 | 21.4% | 12 of 12 |
| 2026 (provisional, partial year) | 21,648 | 22.5% | 7 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 | Onshore Wind Turbine | 18.9 | March 2009 |
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 Cassia Gulch Wind Park, LLC as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Modeled curtailment
A range, not one number. The lower bound counts hours inside the production tax credit window; the upper bound is the no-credit case.
Expected vs reported generation
Monthly modeled expected output and physical potential next to EIA-923 reported output.
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Questions about Cassia Gulch
How much power does Cassia Gulch produce?
Cassia Gulch reported 35,441 MWh (35.4 GWh) of net generation in 2025, a 21.4% capacity factor on 18.9 MW of nameplate capacity. From January to July 2026 it reported 21.6 GWh, which is provisional.
Where is Cassia Gulch?
Cassia Gulch is in Twin Falls County, Idaho, at 42.8744, −115.0172. It is in the Idaho Power Company balancing area (IPCO).
Who operates Cassia Gulch?
EIA-860M for August 2026 lists Cassia Gulch Wind Park, LLC as the operator (EIA operator ID 56157). The operator is not always the owner.
When did Cassia Gulch start operating?
Its first generator began operating in March 2009, 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