Old Trail Wind Farm
Wind power plant in McLean County, Illinois. 213.8 MW of nameplate capacity across 1 generator, operated by Old Trail Wind Farm LLC.
Also known as Twin Groves II · EIA plant 56614
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 213.8 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- December 2007First generator online
- Operator
- Old Trail Wind Farm LLCEIA operator ID 55866
- Grid
- PJMBalancing authority PJM
- Price nodes
- 1 PJM nodeResource nodes with prices
- Location
- McLean County, IL40.4792, −88.7989
- EIA plant ID
- 56614EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Old Trail Wind Farm produces
Free · EIA-923Net generation, 2025
556 GWh
556,306 MWh, final
Capacity factor, 2025
29.7%
2024: 30.1%
January to July 2026
363 GWh
Provisional
Range, 2015 to 2025
520.2–616.6
GWh a year. Low 2023, high 2017
| 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 | 579,235 | Not reported | 12 of 12 |
| 2009 | 579,853 | Not reported | 12 of 12 |
| 2010 | 565,168 | 32.6% | 12 of 12 |
| 2011 | 598,433 | 34.5% | 12 of 12 |
| 2012 | 604,896 | 34.8% | 12 of 12 |
| 2013 | 588,592 | 33.9% | 12 of 12 |
| 2014 | 585,864 | 33.8% | 12 of 12 |
| 2015 | 604,310 | 34.8% | 12 of 12 |
| 2016 | 565,513 | 32.5% | 12 of 12 |
| 2017 | 616,625 | 35.6% | 12 of 12 |
| 2018 | 553,138 | 31.9% | 12 of 12 |
| 2019 | 580,747 | 33.5% | 12 of 12 |
| 2020 | 542,032 | 31.2% | 12 of 12 |
| 2021 | 559,823 | Not reported | 12 of 12 |
| 2022 | 612,235 | 32.7% | 12 of 12 |
| 2023 | 520,235 | 27.8% | 12 of 12 |
| 2024 | 566,055 | 30.1% | 12 of 12 |
| 2025 | 556,306 | 29.7% | 12 of 12 |
| 2026 (provisional, partial year) | 363,368 | 33.4% | 7 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 |
|---|---|---|---|
| 2 | Onshore Wind Turbine | 213.8 | December 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 Old Trail Wind Farm 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 Old Trail Wind Farm
How much power does Old Trail Wind Farm produce?
Old Trail Wind Farm reported 556,306 MWh (556 GWh) of net generation in 2025, a 29.7% capacity factor on 213.8 MW of nameplate capacity. From January to July 2026 it reported 363 GWh, which is provisional.
Where is Old Trail Wind Farm?
Old Trail Wind Farm is in McLean County, Illinois, at 40.4792, −88.7989. It is in the PJM Interconnection, LLC balancing area (PJM).
Who operates Old Trail Wind Farm?
EIA-860M for August 2026 lists Old Trail Wind Farm LLC as the operator (EIA operator ID 55866). The operator is not always the owner.
When did Old Trail Wind Farm start operating?
Its first generator began operating in December 2007, according to EIA-860M.
Does InfraMap have power prices for Old Trail Wind Farm?
Yes. InfraMap has PJM day-ahead and real-time prices at 1 price node linked to Old Trail Wind Farm, 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