GSG LLC
Wind power plant in Lee County, Illinois. 80 MW of nameplate capacity across 1 generator, operated by Leeward Asset Management, LLC.
Also known as GSG Wind Farm · GSG Repower · EIA plant 56450
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 80 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- June 2007First generator online
- Operator
- Leeward Asset Management, LLCEIA operator ID 50123
- Grid
- PJMBalancing authority PJM
- Price nodes
- 2 PJM nodesResource nodes with prices
- Location
- Lee County, IL41.6436, −89.1731
- EIA plant ID
- 56450EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power GSG produces
Free · EIA-923Net generation, 2025
312 GWh
312,297 MWh, final
Capacity factor, 2025
44.6%
2024: 42.5%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
92.5–312.3
GWh a year. Low 2023, 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 | 57,300 | Not reported | 12 of 12 |
| 2008 | 225,221 | Not reported | 12 of 12 |
| 2009 | 204,886 | Not reported | 12 of 12 |
| 2010 | 190,534 | 27.2% | 12 of 12 |
| 2011 | 181,354 | 25.9% | 12 of 12 |
| 2012 | 183,205 | 26.1% | 12 of 12 |
| 2013 | 153,373 | 21.9% | 12 of 12 |
| 2014 | 146,651 | 20.9% | 12 of 12 |
| 2015 | 183,624 | 26.2% | 12 of 12 |
| 2016 | 198,797 | 28.3% | 12 of 12 |
| 2017 | 220,858 | 31.5% | 12 of 12 |
| 2018 | 195,181 | 27.9% | 12 of 12 |
| 2019 | 202,278 | 28.9% | 12 of 12 |
| 2020 | 187,761 | 26.7% | 12 of 12 |
| 2021 | 102,214 | 14.6% | 12 of 12 |
| 2022 | 222,546 | 31.8% | 12 of 12 |
| 2023 | 92,470 | 13.2% | 12 of 12 |
| 2024 | 298,688 | 42.5% | 12 of 12 |
| 2025 | 312,297 | 44.6% | 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 | 80.0 | June 2007 |
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 Leeward Asset Management, 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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Power plants near GSG
More plants operated by Leeward Asset Management, LLC
Questions about GSG
How much power does GSG LLC produce?
GSG LLC reported 312,297 MWh (312 GWh) of net generation in 2025, a 44.6% capacity factor on 80 MW of nameplate capacity.
Where is GSG LLC?
GSG LLC is in Lee County, Illinois, at 41.6436, −89.1731. It is in the PJM Interconnection, LLC balancing area (PJM).
Who operates GSG LLC?
EIA-860M for August 2026 lists Leeward Asset Management, LLC as the operator (EIA operator ID 50123). The operator is not always the owner.
When did GSG LLC start operating?
Its first generator began operating in June 2007, according to EIA-860M.
Does InfraMap have power prices for GSG LLC?
Yes. InfraMap has PJM day-ahead and real-time prices at 2 price nodes linked to GSG 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
- 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