Big Sky Wind LLC
Wind power plant in Bureau County, Illinois. 239.4 MW of nameplate capacity across 1 generator, operated by Big Sky Wind LLC.
Also known as Big Sky Wind · EIA plant 57135
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 239.4 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- February 2011First generator online
- Operator
- Big Sky Wind LLCEIA operator ID 64499
- Grid
- PJMBalancing authority PJM
- Price nodes
- 1 PJM nodeResource nodes with prices
- Location
- Bureau County, IL41.5992, −89.4561
- EIA plant ID
- 57135EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Big Sky Wind produces
Free · EIA-923Net generation, 2025
817 GWh
816,633 MWh, final
Capacity factor, 2025
38.9%
2024: 34.8%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
309.4–816.6
GWh a year. Low 2021, high 2025
| 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 | 469,427 | Not reported | 11 of 12 |
| 2012 | 491,570 | 23.3% | 12 of 12 |
| 2013 | 529,709 | 25.2% | 12 of 12 |
| 2014 | 537,021 | 25.5% | 12 of 12 |
| 2015 | 530,591 | 25.2% | 12 of 12 |
| 2016 | 522,333 | 24.8% | 12 of 12 |
| 2017 | 575,917 | 27.4% | 12 of 12 |
| 2018 | 499,260 | 23.7% | 12 of 12 |
| 2019 | 527,269 | 25.1% | 12 of 12 |
| 2020 | 432,529 | Not reported | 12 of 12 |
| 2021 | 309,392 | 14.8% | 12 of 12 |
| 2022 | 462,296 | 22.0% | 12 of 12 |
| 2023 | 674,716 | 32.2% | 12 of 12 |
| 2024 | 730,889 | 34.8% | 12 of 12 |
| 2025 | 816,633 | 38.9% | 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 account · PJMEmissions
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 | 239.4 | February 2011 |
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 Big Sky Wind 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 Big Sky Wind
How much power does Big Sky Wind LLC produce?
Big Sky Wind LLC reported 816,633 MWh (817 GWh) of net generation in 2025, a 38.9% capacity factor on 239.4 MW of nameplate capacity.
Where is Big Sky Wind LLC?
Big Sky Wind LLC is in Bureau County, Illinois, at 41.5992, −89.4561. It is in the PJM Interconnection, LLC balancing area (PJM).
Who operates Big Sky Wind LLC?
EIA-860M for August 2026 lists Big Sky Wind LLC as the operator (EIA operator ID 64499). The operator is not always the owner.
When did Big Sky Wind LLC start operating?
Its first generator began operating in February 2011, according to EIA-860M.
Does InfraMap have power prices for Big Sky Wind LLC?
Yes. InfraMap has PJM day-ahead and real-time prices at 1 price node linked to Big Sky Wind LLC, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
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)
- PJM day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- 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