Horse Butte Wind I, LLC
Bonneville County, Idaho · EIA plant ID 57890 · Operator: Utah Associated Mun Power Sys
Nameplate58MWSummer 58 MW
Generators1in service
Net generation158GWh12 mo to Dec 2025
Capacity factor31%wind units, summer MW
Heat rate—thermal plants only
First online2012
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), wind 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) |
|---|---|---|---|
| 2012 | 60.2 | 28.5% | — |
| 2013 | 132.6 | 26.3% | — |
| 2014 | 164.4 | 32.6% | — |
| 2015 | 146 | 28.9% | — |
| 2016 | 177.2 | 35.0% | — |
| 2017 | 171.1 | 33.9% | — |
| 2018 | 159.6 | 31.6% | — |
| 2019 | 162.6 | 32.2% | — |
| 2020 | 183.4 | 36.3% | — |
| 2021 | 175.1 | 34.7% | — |
| 2022 | 162.8 | 32.3% | — |
| 2023 | 149.4 | 29.6% | — |
| 2024 | 167.4 | 33.1% | — |
| 2025 | 158 | 31.3% | — |
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 | Onshore Wind Turbine | WT | 57.6 | 57.6 | Aug 2012 | Operating | — | vestas V100-1.8 |
Owner / operator
Operator: Utah Associated Mun Power Sys. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Utah Associated Mun Power Sys | 100.0% | 58 MW |
Nearby plants
Within 80 km.
| Wolverine Creek | 65 MW | 9.1 km |
| Goshen Phase II | 125 MW | 12.6 km |
| IFP Peaking Plant | 18 MW | 13.4 km |
| Meadow Creek Project Company | 120 MW | 16.6 km |
| Cedar Creek Wind, LLC | 160 MW | 27.6 km |
| City Power Plant | 8 MW | 28.3 km |