- Combustion
- Wind & solar
- Loads
- In development
- Under construction
- Operating
- Size not stated
- 10 · 100 · 1,000 MW
Map
- Combustion
- Wind & solar
- Loads
- In development
- Under construction
- Operating
- Size not stated
GREC: location and 5 exact-grade projects within 25 km. Basemap: Protomaps, © OpenStreetMap contributors, ODbL.
GREC
Power plant · Gas, combined cycle
Key facts
Power plant · Gas, combined cycleran 26% of 2025 Operating- Capacity
- Capacity: sourceEIA-860M · Open licenseMW
- Commissioned
- 1985
- Net generation, 2025
- 3,996,684 MWh
- Grid
- 345 kV, 161 kV to Grand River Dam Authority (SWPP)
- Location
- Mayes County, Oklahoma
- Operated by
- Grand River Dam AuthoritySourceEIA-860M Preliminary Monthly Electric Generator Inventory
Output
- Gas
- Coal
- Oil
Details
Who’s behind it
- Owner
- Grand River Dam AuthoritySource100.0%, EPA Greenhouse Gas Reporting Program — facility register with parent-company shares (Envirofacts pub_dim_facility; FLIGHT), as of 31 Dec 2023
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- Technology
- Gas, combined cycle source: “Natural Gas Fired Combined Cycle”
- Age
- 41 years since 1985
- Unused energy
- 11,669 GWh 2025Unused energyA lead, not a guarantee: MW × hours × (1 − capacity factor) for the latest year (EIA-923), gas, coal and oil plants only. Air-permit run-hour caps, heat rate (cost to run) and capacity-market or reliability obligations can rule it out.
- Heat rate
- 8,672 Btu/kWh 2025
All 6 attributes from EIA-860M Preliminary Monthly Electric Generator Inventory
| Attribute | Value |
|---|---|
| EPA greenhouse gas reporting (GHGRP) |
|
| Fuel burned (MMBtu), 2025 | 34,659,901 |
| Capacity factor, 2025 | 0.255 |
| Heat rate (Btu/kWh), 2025 | 8,672.2 |
| Net generation (MWh), 2025 | 3,996,684.0 |
| Balancing authority code | SWPP |
Retirement
EIA-860M September 2026StatusSome generators have retired; the rest of the plant is still in service. As of EIA-860M for September 2026.- Capacity retired
- 540 MW
- Generators retired
- 1
- Capacity still in service
- 1,788.3 MW
| Generator | Technology | Nameplate | State | Date |
|---|---|---|---|---|
| 1 | Conventional Steam Coal | 540 MW | Retired | December 2020 |
Grid
EIA-860 2025Grid fieldsAs the plant reported them to EIA-860 for 2025 (Schedule 2).- Grid voltage at the plant
- 345 kV, 161 kV
- Transmission or distribution system owner
- Grand River Dam Authority
- Balancing authority
- Southwest Power Pool
- NERC region
- MRO
Transmission lines within 25 km (1)
Can the connection be reused?
A plant that retires usually leaves its substation, transmission connection and interconnection agreement behind, and those may be reusable by a new project at the same site. FERC Order No. 845 lets an interconnection customer use surplus interconnection service at an existing site, and some transmission providers' tariffs let a replacement resource take over a retiring unit's interconnection service, usually within a set time after the retirement. Whether any such right still exists here, who holds it and on what terms depends on the owner, the transmission provider and timing; this page does not establish any of that.
Timeline
- Stated Unit 1 scheduled to retire, 540 MW · EIA-860M
- In service · EIA-860M
Sources
5 sourcesSources EIA-860M · LBNL · EIA · EIA-860M Preliminary Monthly Electric Generator Inventory · EPA Greenhouse Gas Reporting Program — facility register with parent-company shares (Envirofacts pub_dim_facility; FLIGHT)
Sources
- EIA-860M Preliminary Monthly Electric Generator Inventory
- LBNL — A Harmonized Geospatial Dataset of U.S. Transmission Lines: Linking FERC Form 1 and HIFLD, 1994-2024 (OEDI submission 8742)Yin, Nait Belaid & Heleno (2026), Lawrence Berkeley National Laboratory, OEDI, CC BY 4.0: A Harmonized Geospatial Dataset of U.S. Transmission Lines: Linking FERC Form 1 and HIFLD, 1994-2024. Modified by Inframation: HIFLD-side fields only, names re-cased, coordinates rounded.
- EIA Open Data bulk file — Electricity (ELEC.zip; monthly plant net generation and fuel consumption since 2001)Source: U.S. Energy Information Administration, Electricity bulk data (Form EIA-923 monthly plant series)
- EIA-860M Preliminary Monthly Electric Generator Inventory
- EPA Greenhouse Gas Reporting Program — facility register with parent-company shares (Envirofacts pub_dim_facility; FLIGHT)
Around this plant
Nearby
within 25 km| Project | Kind | Away | MW |
|---|---|---|---|
| GREC Under construction | Gas, combustion turbine | 0.0 km | 594 |
| Grand River Energy Center Solar Postponed | Solar | 0.4 km | 84 |
| Chimney Rock AOI (Pryor data centre) Filed | Large load | 4.1 km | |
| MYALL LLC / PRY DATA STORAGE FACILITY Built | Large load | 6.8 km | |
| Twelvemile Solar 3 Under construction | Solar | 16.6 km | 200 |
Sources EIA-860M · FAA OE/AAA · EPA ICIS-Air