Big Sky Wind LLC
Bureau County, Illinois · EIA plant ID 57135 · Operator: big sky wind llc
Nameplate239MWSummer 239 MW
Generators1in service
Net generation817GWh12 mo to Dec 2025
Capacity factor39%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 | 469.4 | 24.4% | — |
| 2012 | 491.6 | 23.3% | — |
| 2013 | 529.7 | 25.2% | — |
| 2014 | 537 | 25.5% | — |
| 2015 | 530.6 | 25.2% | — |
| 2016 | 522.3 | 24.8% | — |
| 2017 | 575.9 | 27.4% | — |
| 2018 | 499.3 | 23.8% | — |
| 2019 | 527.3 | 25.1% | — |
| 2020 | 432.5 | 20.6% | — |
| 2021 | 309.4 | 14.8% | — |
| 2022 | 462.3 | 22.0% | — |
| 2023 | 674.7 | 32.2% | — |
| 2024 | 730.9 | 34.8% | — |
| 2025 | 816.6 | 38.9% | — |
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 | 239.4 | 239.4 | Feb 2011 | Operating | — | vestas V120-2.0 |
Owner / operator
Operator: big sky wind llc. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| big sky wind llc | 100.0% | 239 MW |
Nearby plants
Within 80 km.
| SV CSG Paloma Solar | 4 MW | 2.1 km |
| Ohio Solar LLC | 5 MW | 5 km |
| Green River Wind Farm | 194 MW | 8.7 km |
| Bureau Solar 2 LLC | — | 15.1 km |
| Walnut Ridge Wind Farm | 212 MW | 15.4 km |
| Bureau Solar 1 | 5 MW | 17.6 km |