# Green Country Power Station

SPP asset profile · https://askthegrid.com/assets/facilities/green-country-power-station

Public Service Company of Oklahoma - Tulsa County - SPP

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.

## Metrics

- **Nameplate capacity:** 903.9000000000001 MW — Canonical EIA plant baseline.
- **Registry anchor:** Plant 55146 — plant-55146

## Facts

- **Technology:** Natural Gas Fired Combined Cycle
- **Operator:** Public Service Company of Oklahoma

## Related parties

- **Owner / operator:** Public Service Company of Oklahoma — Current owner and operator ([source](https://www.psoklahoma.com/))
- **Parent company:** American Electric Power — Parent company of PSO ([source](https://www.aep.com/))
- **Former owner / sponsor:** J-POWER USA Generation, L.P. — Former owner and sponsor ([source](https://www.jpowerusa.com/))
- **Former owner / equity investor:** John Hancock Infrastructure Fund — Former 50% joint-venture investor
- **Former owner / parent company / equity investor:** Electric Power Development Co., Ltd. (J-POWER) — Former 50% joint-venture investor and parent of J-POWER USA ([source](https://www.jpower.co.jp/english/))
- **Operator / O&M provider:** Green Country Operating Services, LLC — Historical operator and O&M provider
- **Balancing authority / market operator / regulator:** Southwest Power Pool, Inc. — RTO/ISO and reliability coordinator ([source](https://www.spp.org/))
- **Transmission owner / balancing authority:** American Electric Power Service Corp. — Historical transmission operator, balancing authority, and transmission planner ([source](https://www.aep.com/))
- **Former owner / developer:** Cogentrix Energy Inc. — Original developer ([source](https://www.cogentrix.com/))
- **EPC contractor / construction contractor:** National Energy Production Corporation (NEPCO) — Original EPC contractor
- **Equipment supplier:** General Electric (GE; current gas-power business: GE Vernova) — Equipment manufacturer ([source](https://www.gevernova.com/))
- **Former owner / equity investor:** GE Energy Financial Services — Historical equity investor
- **Former owner / equity investor:** Tyr Capital LLC — Historical equity investor
- **Lender:** Bank of America — Historical financing lender ([source](https://www.bankofamerica.com/))
- **Lender:** CoBank — Historical financing lender

## Sources

- [psoklahoma.com](http://psoklahoma.com/company/news/view?releaseID=10308) — psoklahoma.com · public_source — Source retained for exact-record publication review.
- [journalrecord.com](https://journalrecord.com/2000/04/12/cogentrix-energy-breaks-ground-for-jenks-plant/) — journalrecord.com · public_source — Source retained for exact-record publication review.
- [journalrecord.com](https://journalrecord.com/2007/08/08/illinois-firm-buys-jenks-power-plant/) — journalrecord.com · public_source — Source retained for exact-record publication review.
- [mbrweb.ferc.gov](https://mbrweb.ferc.gov/SearchlkpEIA/Index?page=253) — mbrweb.ferc.gov · authoritative — Source retained for exact-record publication review.

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Canonical page: https://askthegrid.com/assets/facilities/green-country-power-station
Website: [Public Service Company of Oklahoma](https://www.psoklahoma.com/)

Source: Ask the Grid — https://askthegrid.com/