Dempsey Ridge Wind Farm
Wind power plant in Roger Mills County, Oklahoma. 132 MW of nameplate capacity across 1 generator, operated by Acciona Wind Energy USA LLC.
Also known as Big Smile Wind Farm at Dempsey Ridge · EIA plant 56665
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 132 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- May 2012First generator online
- Operator
- Acciona Wind Energy USA LLCEIA operator ID 55918
- Grid
- SPPBalancing authority SWPP
- Price nodes
- 1 SPP nodeResource nodes with prices
- Location
- Roger Mills County, OK35.5298, −99.8145
- EIA plant ID
- 56665EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Dempsey Ridge Wind Farm produces
Free · EIA-923Net generation, 2025
118 GWh
118,282 MWh, final
Capacity factor, 2025
10.2%
2024: 10.0%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
116.5–426.0
GWh a year. Low 2024, high 2016
| 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 | Not reported | Not reported | 0 of 12 |
| 2012 | 286,665 | Not reported | 10 of 12 |
| 2013 | 395,629 | 34.2% | 12 of 12 |
| 2014 | 446,681 | 38.6% | 12 of 12 |
| 2015 | 386,074 | 33.4% | 12 of 12 |
| 2016 | 426,025 | 36.7% | 12 of 12 |
| 2017 | 320,025 | 27.7% | 12 of 12 |
| 2018 | 358,807 | 31.0% | 12 of 12 |
| 2019 | 344,066 | 29.8% | 12 of 12 |
| 2020 | 345,339 | 29.8% | 12 of 12 |
| 2021 | 291,567 | 25.2% | 12 of 12 |
| 2022 | 210,456 | 18.2% | 12 of 12 |
| 2023 | 187,808 | 16.2% | 12 of 12 |
| 2024 | 116,503 | 10.0% | 12 of 12 |
| 2025 | 118,282 | 10.2% | 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 · SPPEmissions
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 |
|---|---|---|---|
| DR | Onshore Wind Turbine | 132.0 | May 2012 |
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 Acciona Wind Energy USA 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 Dempsey Ridge Wind Farm
More plants operated by Acciona Wind Energy USA LLC
Questions about Dempsey Ridge Wind Farm
How much power does Dempsey Ridge Wind Farm produce?
Dempsey Ridge Wind Farm reported 118,282 MWh (118 GWh) of net generation in 2025, a 10.2% capacity factor on 132 MW of nameplate capacity.
Where is Dempsey Ridge Wind Farm?
Dempsey Ridge Wind Farm is in Roger Mills County, Oklahoma, at 35.5298, −99.8145. It is in the Southwest Power Pool balancing area (SWPP).
Who operates Dempsey Ridge Wind Farm?
EIA-860M for August 2026 lists Acciona Wind Energy USA LLC as the operator (EIA operator ID 55918). The operator is not always the owner.
When did Dempsey Ridge Wind Farm start operating?
Its first generator began operating in May 2012, according to EIA-860M.
Does InfraMap have power prices for Dempsey Ridge Wind Farm?
Yes. InfraMap has SPP day-ahead and real-time prices at 1 price node linked to Dempsey Ridge 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)
- SPP 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