How big is Green Country Power Station?

Green Country Power Station has a reported capacity of 903.9 MW. Source: EIA Form 860M.

What kind of plant is Green Country Power Station?

Green Country Power Station is a Natural Gas Fired Combined Cycle facility in Tulsa County, OK, participating in the SPP market.

Where is Green Country Power Station located?

Green Country Power Station is in Tulsa County, OK, inside the SPP balancing area.

Who operates Green Country Power Station?

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.

How much electricity does Green Country Power Station generate?

Green Country Power Station reported 3,735.1 GWh over the twelve months to 2026-04. Figures are net generation as filed to EIA-923.

How does Green Country Power Station compare to other plants?

By capacity, Green Country Power Station ranks #113 of 538 operating plants of the same technology nationally. It ranks #5 of 12 in OK.

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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.

Website Open in grid

Aerial photograph of Green Country Power Plant in Jenks, Oklahoma.

Source: American Electric Power / Public Service Company of Oklahoma

Green Country Power Station

SPP · Asset profile

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Green Country Power Station — 904 MW gas plant, OK · Ask the Grid

Overview

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

Structured profile

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

Related assets

Similar plants ranked by technology, capacity, and distance.

Oneta Energy Center

Natural Gas · 1,214 MW

Wagoner County

Same typeComparable scale13 mi away

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Riverside (OK)

Natural Gas · 1,121.7 MW

Tulsa County

Same typeComparable scale2 mi away

Compare with this plant

Units and generators

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

Performance

Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.

Peer context

Technology capacity: 903.9 MW
National rank: #113
OK rank: #5

Monthly generation

Download CSV

Latest 12 months

3.74 TWh

Reported net generation

Latest report

Apr 2026

EIA-923 monthly filing

2025 capacity factor

46.1%

Grid and market context

Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.

Nearby substations

HIFLD infrastructure inventory

GREEN COUNTRY

IN SERVICE · 345 kV

0.1 km

TAP148869

Commercial, land, and environmental record

Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.

Transactions and agreements

Construction Start

Apr 12, 2000

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.

$300.0MCogentrix Energy Inc. · National Energy Production Corporation · Bank of America · CoBank

journalrecord.com

Regulatory Approval

Jun 4, 2025

The Oklahoma Corporation Commission approved Public Service Company of Oklahoma's purchase of the 795 MW Green Country Power Plant.

Public Service Company of Oklahoma · Oklahoma Corporation Commission

psoklahoma.com

Related parties and identifiers

Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.

Relationship graph

Drag organizations to explore the network. Select a node to pin its details and available page link.

AssetOwner / operatorFinancierContractorMarket / regulatorEquipmentRelated asset

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

Apr 12, 2000
Apr 12, 2000
Groundbreaking and construction startjournalreco...
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.
Feb 2002
Feb 2002

Reporting portfolio

EIA reporting entity

Public Service Co of Oklahoma

Entity 15474

Operating portfolio

13 plants

2 states

Reported capacity

6,024.8 MW

Conventional Steam Coal · Natural Gas Fired Combined Cycle · Natural Gas Fired Combustion Turbine

Largest reported plants in this portfolio
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 portfolio

Green Country Power Station

Ask about Green Country Power Station

Green Country Power Station

Ask about Green Country Power Station

Overview

Structured profile

Related assets

Oneta Energy Center

Riverside (OK)

Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Nearby substations

Commercial, land, and environmental record

Transactions and agreements

Related parties and identifiers

Relationship graph

Timeline and sources

Project timeline

Redbud Power Plant

State Line Combined Cycle

Northeastern

McClain Energy Facility

Parties and identifiers

Reporting portfolio

Sources

Common questions about Green Country Power Station

How big is Green Country Power Station?

What kind of plant is Green Country Power Station?

Where is Green Country Power Station located?

Who operates Green Country Power Station?

How much electricity does Green Country Power Station generate?

How does Green Country Power Station compare to other plants?

Co-located assets