Green Country Power Station
Natural gas power plant in Tulsa County, Oklahoma. 903.9 MW of nameplate capacity across 6 generators, operated by Public Service Co of Oklahoma.
Also known as Green Country Energy · EIA plant 55146
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 903.9 MWNameplate
- Generators
- 6 operatingEIA-860M, August 2026
- Operating since
- February 2002First generator online
- Operator
- Public Service Co of OklahomaEIA operator ID 15474
- Grid
- SPPBalancing authority SWPP
- Price nodes
- 3 SPP nodesResource nodes with prices
- Location
- Tulsa County, OK35.9833, −95.9346
- EIA plant ID
- 55146EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Green Country produces
Free · EIA-923Net generation, 2025
3.65 TWh
3,651,548 MWh, final
Capacity factor, 2025
46.1%
2024: 53.5%
January to July 2026
2.39 TWh
Provisional
Range, 2015 to 2025
3.2–5.0
TWh a year. Low 2022, high 2018
| 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 | 2,105,160 | Not reported | 12 of 12 |
| 2003 | 2,136,922 | Not reported | 12 of 12 |
| 2004 | 2,323,460 | Not reported | 12 of 12 |
| 2005 | 2,889,638 | Not reported | 12 of 12 |
| 2006 | 2,701,435 | Not reported | 12 of 12 |
| 2007 | 3,060,126 | Not reported | 12 of 12 |
| 2008 | 3,189,139 | Not reported | 12 of 12 |
| 2009 | 3,752,218 | Not reported | 12 of 12 |
| 2010 | 2,485,850 | 31.4% | 12 of 12 |
| 2011 | 2,181,127 | 27.5% | 12 of 12 |
| 2012 | 4,017,223 | 50.6% | 12 of 12 |
| 2013 | 3,164,514 | 40.0% | 12 of 12 |
| 2014 | 3,127,419 | 39.5% | 12 of 12 |
| 2015 | 3,734,504 | 47.2% | 12 of 12 |
| 2016 | 3,928,376 | 49.5% | 12 of 12 |
| 2017 | 4,928,961 | 62.2% | 12 of 12 |
| 2018 | 4,985,809 | 63.0% | 12 of 12 |
| 2019 | 4,725,797 | 59.7% | 12 of 12 |
| 2020 | 4,240,311 | 53.4% | 12 of 12 |
| 2021 | 3,332,687 | 42.1% | 12 of 12 |
| 2022 | 3,172,915 | 40.1% | 12 of 12 |
| 2023 | 3,853,699 | 48.7% | 12 of 12 |
| 2024 | 4,245,662 | 53.5% | 12 of 12 |
| 2025 | 3,651,548 | 46.1% | 12 of 12 |
| 2026 (provisional, partial year) | 2,388,675 | 51.9% | 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 · SPPEmissions
Free · EPA CAMPDCO₂, 2025
1.57M
US short tons. 2024: 1.83M
SO₂, 2025
8
US short tons
NOx, 2025
373
US short tons
CO₂ per MWh, calculated
0.43 t
About 861 lb per MWh
3 of 3 EPA units reported CO₂ in 2025 (CTGEN1, CTGEN2, CTGEN3), matched to EIA plant 55146 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
1,140
million gallons
Consumption, 2024
1,030
million gallons
Source
Municipal
Other, Other. Induced-draft tower
Watershed stress
Moderate · 0.485
USGS SUI, HUC12 Posey Creek-Arkansas River
36 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 |
|---|---|---|---|
| CTG1 | Natural Gas Fired Combined Cycle | 179.3 | February 2002 |
| CTG2 | Natural Gas Fired Combined Cycle | 179.3 | February 2002 |
| CTG3 | Natural Gas Fired Combined Cycle | 179.3 | February 2002 |
| STG1 | Natural Gas Fired Combined Cycle | 122.0 | February 2002 |
| STG2 | Natural Gas Fired Combined Cycle | 122.0 | February 2002 |
| STG3 | Natural Gas Fired Combined Cycle | 122.0 | February 2002 |
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 Green Country
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Questions about Green Country
How much power does Green Country Power Station produce?
Green Country Power Station reported 3,651,548 MWh (3.65 TWh) of net generation in 2025, a 46.1% capacity factor on 903.9 MW of nameplate capacity. From January to July 2026 it reported 2.39 TWh, which is provisional.
Where is Green Country Power Station?
Green Country Power Station is in Tulsa County, Oklahoma, at 35.9833, −95.9346. It is in the Southwest Power Pool balancing area (SWPP).
Who operates Green Country Power Station?
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 Green Country Power Station start operating?
Its first generator began operating in February 2002, according to EIA-860M.
Does InfraMap have power prices for Green Country Power Station?
Yes. InfraMap has SPP day-ahead and real-time prices at 3 price nodes linked to Green Country Power Station, 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