Green Country Power Station
Public Service Company of OklahomaTulsa County
Green Country Power Station is a natural-gas-fired combined-cycle facility in Jenks, Tulsa County, Oklahoma, consisting of three 1×1 generating units powered by GE 7FA combustion turbines. The facility's contractual capacity is 795 MW; its six EIA-nameplate generator records total 903.9 MW. PSO acquired 100% of the facility in June 2025 and assumed full ownership and operational control. A capacity-recovery program in 2017 restored output through controls, duct-burner, and turbine-component upgrades, achieving 801 MW in testing. PSO sells a portion of Green Country's capacity to SWEPCo through May 2027 under a continuing agreement.
Mapped infrastructure geometry associated with this asset.
EIA plant 55146 · Inventory for Aug 2026.
| Generator | Technology | Status | Power (MW) | Energy (MWh) |
|---|---|---|---|---|
| CTG1 | Natural Gas Fired Combined Cycle | Operating | 179.3 | Unknown |
| CTG2 | Natural Gas Fired Combined Cycle | Operating | 179.3 | Unknown |
| CTG3 | Natural Gas Fired Combined Cycle | Operating | 179.3 | Unknown |
| STG1 | Natural Gas Fired Combined Cycle | Operating | 122 |
Similar plants ranked by technology, capacity, and distance.
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| CTG1 | 179.3 MW 155 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CT | Feb 2002 | Operating |
| CTG2 | 179.3 MW 155 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CT | Feb 2002 | Operating |
| CTG3 | 179.3 MW 155 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CT | Feb 2002 | Operating |
| STG1 | 122 MW 106 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CA | Feb 2002 | Operating |
| STG2 | ||||
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
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Project milestones and public references behind the asset profile.
Cogentrix Energy broke ground on the approximately $300 million Green Country Energy project in Jenks. National Energy Production Corp. (Enron subsidiary) named as EPC contractor.
| Unknown |
| STG2 | Natural Gas Fired Combined Cycle | Operating | 122 | Unknown |
|---|
| STG3 | Natural Gas Fired Combined Cycle | Operating | 122 | Unknown |
|---|
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
| Largest reported plants | Capacity | State | |
|---|---|---|---|
| Northeastern | 1,477.5 MW | OK | |
| Riverside (OK) | 1,121.7 MW | OK | |
| Green Country Power StationCurrent | 903.9 MW | OK | |
| Southwestern | 656 MW | OK | |
| Tulsa | 348.2 MW | OK | |
| Comanche (OK) | 290 MW | OK | |
| Maverick Wind Project, LLC | 288 MW | OK | |
| Sundance Wind Project, LLC | 199 MW | OK |
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
View full reporting portfolioEIA-860 lists generator CTG1, generator CTG2, generator CTG3, generator STG1, generator STG2, generator STG3 with this operating date.
The Oklahoma Corporation Commission approved Public Service Company of Oklahoma's purchase of the 795 MW Green Country Power Plant.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
Green Country Power Station reports 903.9 MW natural gas of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Aug 2026.
Green Country Power Station is a Natural Gas Fired Combined Cycle facility in Tulsa County, OK, participating in the SPP market.
Green Country Power Station is in Tulsa County, OK, inside the SPP balancing area.
Green Country Power Station is operated by Public Service Co of Oklahoma according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Green Country Power Station reported 4,094 GWh over the twelve months to 2026-07. Figures are net generation as filed to EIA-923.
By capacity, Green Country Power Station ranks #114 of 540 operating plants of the same technology nationally. It ranks #5 of 12 in OK.
Plants within 25 km, nearest first, regardless of technology. Proximity is straight-line distance between mapped plant coordinates; it does not by itself establish a shared point of interconnection.