GREC
GREC is a natural gas plant in Mayes County, Oklahoma, operated by Grand River Dam Authority. A further 594 MW of new generating units is reported as planned or under construction on the site. Retired units here add up to 540 MW across 1 unit, taken out of service in 2020. Its biggest unit, rated at 594 MW, is the third-largest single generator in Oklahoma.
Nameplate capacity, 2025
1,194 MW
960 MW net summer capacity
3 operable units
- Gas combined cycle600 MW50%
- Coal steam594 MW50%
Unit by unit, 1981 to 2025
operating in 2025retiredbar height follows unit size
Unit 1 Coal steam, 540 MW, 1981–2020
Unit 2 Coal steam, 594 MW, 1985
Unit 3CT Gas combined cycle, 369 MW, 2017
Unit 3ST Gas combined cycle, 231 MW, 2017
Among Oklahoma’s plants
Largest plants in the state by nameplate capacity, with the plants ranked next to this one.
- 1Muskogee1,716 MW
- 2Seminole (OK)1,701 MW
- 3Northeastern1,478 MW
- 5Kiamichi Energy Facility1,370 MW
- 6Oneta Energy Center1,214 MW
- 7GRECthis plant
- 8Sooner1,138 MW
- 9Riverside (OK)1,122 MW
Other rankings
- All US power plants
- 227th of 14,286
- Power plants in Oklahoma
- 7th of 143
- US natural gas plants
- 100th of 1,961
- Natural gas plants in Oklahoma
- 7th of 34
- Plants in the Southwest Power Pool balancing area
- 12th of 713
- Plants run by Grand River Dam Authority
- 1st of 4
Operable units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 2 | Coal steam | 594 MW | 479 MW | 1985 | Operating |
| 3CT | Gas combined cycle | 369 MW | 310 MW | 2017 | Operating |
| 3ST | Gas combined cycle | 231 MW | 170 MW | 2017 | Operating |
Retired units
| Unit | Technology | Nameplate | In service |
|---|---|---|---|
| 1 | Coal steam | 540 MW | 1981–2020 |
New units reported to EIA
| Technology | Nameplate | Expected | Stage at end of 2025 |
|---|---|---|---|
| Gas combustion turbine | 594 MW | 2026 | under construction (over half done) |
Grid and site
- Balancing area
- Southwest Power Pool
- Reliability region
- Midwest Reliability Organization
- Highest grid connection voltage
- 345 kV
- Water source
- Grand Neosho
- Nearest town on record
- Chouteau
- Operator type
- Utility
- Coordinates
- 36.190°N, 95.289°W
Closest plants
| Plant | Runs on | Capacity | Distance |
|---|---|---|---|
| Chouteau | Natural gas | 1,070 MW | 2.3 mi north |
| Markham | Hydroelectric | 128 MW | 6.6 mi northeast |
| Salina | Pumped-storage hydro | 259 MW | 11.6 mi northeast |
| Fort Gibson | Hydroelectric | 44.8 MW | 22.5 mi south |
| Pensacola | Hydroelectric | 130 MW | 23.6 mi northeast |
| Oneta Energy Center | Natural gas | 1,214 MW | 25.9 mi southwest |
| Northeastern | Natural gas | 1,478 MW | 28.3 mi northwest |
| Muskogee | Natural gas | 1,716 MW | 29.6 mi south |