Burley Butte Windpark
Cassia County, Idaho · EIA plant ID 56434 · Operator: Idaho Wind Partners 1 LLC
Nameplate21MWSummer 21 MW
Generators1in service
Net generation56GWh12 mo to Dec 2025
Capacity factor30%wind units, summer MW
Heat rate—thermal plants only
First online2011
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) |
|---|---|---|---|
| 2011 | 45.6 | 42.1% | — |
| 2012 | 60 | 50.6% | — |
| 2013 | 57.9 | 49.0% | — |
| 2014 | 61.3 | 51.8% | — |
| 2015 | 51.2 | 43.3% | — |
| 2016 | 56.4 | 30.1% | — |
| 2017 | 48.2 | 25.8% | — |
| 2018 | 61.3 | 32.9% | — |
| 2019 | 56.1 | 30.1% | — |
| 2020 | 62.6 | 33.5% | — |
| 2021 | 64.3 | 34.5% | — |
| 2022 | 56.5 | 30.3% | — |
| 2023 | 49.5 | 26.5% | — |
| 2024 | 61.1 | 32.6% | — |
| 2025 | 56 | 30.0% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| BBWP | Onshore Wind Turbine | WT | 21.3 | 21.3 | Feb 2011 | Operating | — | ge 1.5 XLE |
Owner / operator
Operator: Idaho Wind Partners 1 LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Idaho Wind Partners 1 LLC | 100.0% | 21 MW |
Nearby plants
Within 80 km.
| Golden Valley Wind Park LLC | 12 MW | 6 km |
| Milner Butte LFGE | 4 MW | 6.9 km |
| Milner Dam Wind Park LLC | 20 MW | 8.1 km |
| Milner Hydro | 60 MW | 9.9 km |
| Bypass | 10 MW | 13.3 km |
| S E Hazelton A | 9 MW | 15.8 km |