Horse Butte Wind I, LLC
Wind power plant in Bonneville County, Idaho. 57.6 MW of nameplate capacity across 1 generator, operated by Utah Associated Mun Power Sys.
Also known as Horse Butte Wind I · Horse Butte · EIA plant 57890
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 57.6 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- August 2012First generator online
- Operator
- Utah Associated Mun Power SysEIA operator ID 40575
- Grid
- BPATBalancing authority BPAT
- Price nodes
- None linkedNo verified ISO node
- Location
- Bonneville County, ID43.3864, −111.7264
- EIA plant ID
- 57890EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Horse Butte Wind I produces
Free · EIA-923Net generation, 2025
158 GWh
157,956 MWh, final
Capacity factor, 2025
31.3%
2024: 33.1%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
146.0–183.4
GWh a year. Low 2015, high 2020
| 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 | Not reported | Not reported | 0 of 12 |
| 2010 | Not reported | Not reported | 0 of 12 |
| 2011 | Not reported | Not reported | 0 of 12 |
| 2012 | 60,244 | Not reported | 6 of 12 |
| 2013 | 132,629 | 26.3% | 12 of 12 |
| 2014 | 164,441 | 32.6% | 12 of 12 |
| 2015 | 146,002 | 28.9% | 12 of 12 |
| 2016 | 177,234 | 35.0% | 12 of 12 |
| 2017 | 171,099 | 33.9% | 12 of 12 |
| 2018 | 159,639 | 31.6% | 12 of 12 |
| 2019 | 162,640 | 32.2% | 12 of 12 |
| 2020 | 183,405 | 36.2% | 12 of 12 |
| 2021 | 175,122 | 34.7% | 12 of 12 |
| 2022 | 162,751 | 32.3% | 12 of 12 |
| 2023 | 149,368 | 29.6% | 12 of 12 |
| 2024 | 167,388 | 33.1% | 12 of 12 |
| 2025 | 157,956 | 31.3% | 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 | Onshore Wind Turbine | 57.6 | August 2012 |
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 Utah Associated Mun Power Sys 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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Power plants near Horse Butte Wind I
More plants operated by Utah Associated Mun Power Sys
Questions about Horse Butte Wind I
How much power does Horse Butte Wind I, LLC produce?
Horse Butte Wind I, LLC reported 157,956 MWh (158 GWh) of net generation in 2025, a 31.3% capacity factor on 57.6 MW of nameplate capacity.
Where is Horse Butte Wind I, LLC?
Horse Butte Wind I, LLC is in Bonneville County, Idaho, at 43.3864, −111.7264. It is in the Bonneville Power Administration balancing area (BPAT).
Who operates Horse Butte Wind I, LLC?
EIA-860M for August 2026 lists Utah Associated Mun Power Sys as the operator (EIA operator ID 40575). The operator is not always the owner.
When did Horse Butte Wind I, LLC start operating?
Its first generator began operating in August 2012, 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)
- Project names from the USGS U.S. Wind Turbine Database
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page