Southwestern
Natural gas power plant in Caddo County, Oklahoma. 656 MW of nameplate capacity across 5 generators, operated by Public Service Co of Oklahoma.
Also known as Southwestern Power Plant · EIA plant 2964
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Key facts
- Capacity
- 656 MWNameplate
- Generators
- 5 operatingEIA-860M, August 2026
- Operating since
- July 1952First generator online
- Operator
- Public Service Co of OklahomaEIA operator ID 15474
- Grid
- SPPBalancing authority SWPP
- Price nodes
- 3 SPP nodesResource nodes with prices
- Location
- Caddo County, OK35.1009, −98.3524
- EIA plant ID
- 2964EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Southwestern produces
Free · EIA-923Net generation, 2025
453 GWh
453,455 MWh, final
Capacity factor, 2025
7.9%
2024: 13.5%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2018 to 2025
0.4–1.0
TWh a year. Low 2020, high 2023
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 1,057,273 | Not reported | 12 of 12 |
| 2001 | 1,152,943 | Not reported | 12 of 12 |
| 2002 | 783,636 | Not reported | 12 of 12 |
| 2003 | 779,235 | Not reported | 12 of 12 |
| 2004 | 648,400 | Not reported | 12 of 12 |
| 2005 | 727,783 | Not reported | 12 of 12 |
| 2006 | 648,284 | Not reported | 12 of 12 |
| 2007 | 663,082 | Not reported | 12 of 12 |
| 2008 | Not reported | Not reported | 0 of 12 |
| 2009 | 90,371 | Not reported | 1 of 12 |
| 2010 | 452,620 | 15.7% | 6 of 12 |
| 2011 | 327,369 | 11.5% | 6 of 12 |
| 2012 | 299,762 | 15.7% | 4 of 12 |
| 2013 | 470,023 | 8.2% | 12 of 12 |
| 2014 | 224,604 | 6.6% | 7 of 12 |
| 2015 | Not reported | Not reported | 0 of 12 |
| 2016 | Not reported | Not reported | 0 of 12 |
| 2017 | 2,527 | 0.5% | 1 of 12 |
| 2018 | 610,310 | 10.6% | 12 of 12 |
| 2019 | 627,292 | 10.9% | 12 of 12 |
| 2020 | 438,559 | 7.6% | 12 of 12 |
| 2021 | 633,379 | 11.0% | 12 of 12 |
| 2022 | 799,394 | 13.9% | 12 of 12 |
| 2023 | 1,044,078 | 18.1% | 12 of 12 |
| 2024 | 779,423 | 13.5% | 12 of 12 |
| 2025 | 453,455 | 7.9% | 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 · SPPEmissions
Free · EPA CAMPDCO₂, 2025
486,916
US short tons. 2024: 628,057
SO₂, 2025
2
US short tons
NOx, 2025
933
US short tons
CO₂ per MWh, calculated
1.07 t
About 2,148 lb per MWh
6 of 6 EPA units reported CO₂ in 2025 (8002, 8003, 8004, 8005, 801N, 801S), matched to EIA plant 2964 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSWithdrawal, 2024
877
million gallons
Consumption, 2024
607
million gallons
Source
Municipal
Surface, Fresh. Induced-draft tower
Watershed stress
Moderate · 0.458
USGS SUI, HUC12 Deep Creek-Washita River
12 of 36 cooling months report withdrawal. SUI of the HUC12 containing the plant. Blank volumes are unreported, not zero.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Natural Gas Steam Turbine | 84.0 | July 1952 |
| 2 | Natural Gas Steam Turbine | 84.0 | March 1954 |
| 3 | Natural Gas Steam Turbine | 315.0 | July 1967 |
| 4 | Natural Gas Fired Combustion Turbine | 86.5 | February 2008 |
| 5 | Natural Gas Fired Combustion Turbine | 86.5 | February 2008 |
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 Public Service Co of Oklahoma as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Power plants near Southwestern
More plants operated by Public Service Co of Oklahoma
Questions about Southwestern
How much power does Southwestern produce?
Southwestern reported 453,455 MWh (453 GWh) of net generation in 2025, a 7.9% capacity factor on 656 MW of nameplate capacity.
Where is Southwestern?
Southwestern is in Caddo County, Oklahoma, at 35.1009, −98.3524. It is in the Southwest Power Pool balancing area (SWPP).
Who operates Southwestern?
EIA-860M for August 2026 lists Public Service Co of Oklahoma as the operator (EIA operator ID 15474). The operator is not always the owner.
When did Southwestern start operating?
Its first generator began operating in July 1952, according to EIA-860M.
Does InfraMap have power prices for Southwestern?
Yes. InfraMap has SPP day-ahead and real-time prices at 3 price nodes linked to Southwestern, 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)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- SPP day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- EIA-923 cooling water 2024 and the USGS surface water supply and use index, Water years 2010-2020 (Oct 2009 to Sep 2020), mean of monthly values
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page