Green Country Energy LLC
Tulsa County, Oklahoma · EIA plant ID 55146 · Operator: Public Service Co of Oklahoma
Nameplate904MWSummer 783 MW
Generators6in service
Net generation4,075GWh12 mo to Aug 2026
Capacity factor59%gas/coal/oil units, summer MW
Heat rate8,749Btu/kWhfossil units, electric fuel, HHV
First online2002Runs as baseload
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), gas/coal/oil units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2002 | 2,105.2 | — | — |
| 2003 | 2,136.9 | 31.3% | 7,837 |
| 2004 | 2,323.5 | 33.3% | 7,045 |
| 2005 | 2,889.6 | 41.5% | 7,233 |
| 2006 | 2,701.4 | 38.8% | 7,226 |
| 2007 | 3,060.1 | 44.6% | 7,265 |
| 2008 | 3,189.1 | 46.4% | 7,236 |
| 2009 | 3,752.2 | 54.7% | 7,233 |
| 2010 | 2,485.9 | 36.2% | 7,314 |
| 2011 | 2,181.1 | 31.8% | 7,336 |
| 2012 | 4,017.2 | 58.4% | 7,232 |
| 2013 | 3,164.5 | 46.1% | 7,270 |
| 2014 | 3,127.4 | 45.6% | 7,310 |
| 2015 | 3,734.5 | 54.4% | 7,233 |
| 2016 | 3,928.4 | 57.1% | 7,221 |
| 2017 | 4,929 | 71.9% | 7,197 |
| 2018 | 4,985.8 | 72.7% | 7,264 |
| 2019 | 4,725.8 | 68.9% | 7,269 |
| 2020 | 4,240.3 | 61.7% | 7,237 |
| 2021 | 3,332.7 | 48.6% | 7,320 |
| 2022 | 3,172.9 | 46.3% | 7,400 |
| 2023 | 3,853.7 | 56.2% | 7,368 |
| 2024 | 4,245.7 | 61.7% | 7,360 |
| 2025 | 3,651.5 | 53.2% | 7,291 |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| CTG1 | Natural Gas Fired Combined Cycle | CT | 179.3 | 155 | Feb 2002 | Operating | — | coming soon |
| CTG2 | Natural Gas Fired Combined Cycle | CT | 179.3 | 155 | Feb 2002 | Operating | — | coming soon |
| CTG3 | Natural Gas Fired Combined Cycle | CT | 179.3 | 155 | Feb 2002 | Operating | — | coming soon |
| STG1 | Natural Gas Fired Combined Cycle | CA | 122 | 106 | Feb 2002 | Operating | — | coming soon |
| STG2 | Natural Gas Fired Combined Cycle | CA | 122 | 106 | Feb 2002 | Operating | — | coming soon |
| STG3 | Natural Gas Fired Combined Cycle | CA | 122 | 106 | Feb 2002 | Operating | — | coming soon |
Owner / operator
Operator: Public Service Co of Oklahoma. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Public Service Co of Oklahoma | 100.0% | 904 MW |
Nearby plants
Within 80 km.
| Riverside (OK) | 1,122 MW | 2.6 km |
| Tulsa | 348 MW | 15.7 km |
| Covanta Tulsa Renewable Energy LLC | 17 MW | 18.1 km |
| Oneta Energy Center | 1,214 MW | 21.6 km |
| Tulsa LFG LLC | 3 MW | 30.1 km |
| Keystone Dam | 70 MW | 34 km |