GREC
Mayes County, Oklahoma · EIA plant ID 165 · Operator: Grand River Dam Authority
×540 MW coal retired since 2020 (latest Dec 2020)
Nameplate1,788MWSummer 1,376 MW
Generators4in service
Net generation2,653GWh12 mo to Aug 2026
Capacity factor32%gas/coal/oil units, summer MW
Heat rate9,369Btu/kWhfossil units, electric fuel, HHV
First online1985Runs as baseload
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), gas/coal/oil units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 6,517.7 | — | — |
| 2002 | 6,501.4 | — | — |
| 2003 | 7,079.3 | 80.0% | 10,541 |
| 2004 | 6,445.1 | 72.7% | 10,678 |
| 2005 | 6,732.4 | 76.1% | 10,750 |
| 2006 | 6,151.2 | 69.5% | 10,936 |
| 2007 | 7,009.7 | 79.2% | 10,987 |
| 2008 | 7,033.9 | 79.3% | 10,930 |
| 2009 | 6,840.4 | 77.3% | 11,072 |
| 2010 | 6,263.5 | 70.8% | 10,973 |
| 2011 | 6,804.5 | 76.9% | 10,871 |
| 2012 | 5,054.7 | 57.0% | 11,302 |
| 2013 | 5,570.6 | 63.0% | 11,555 |
| 2014 | 4,674.6 | 53.9% | 11,899 |
| 2015 | 3,755.2 | 42.4% | 12,166 |
| 2016 | 2,306.5 | 26.0% | 12,406 |
| 2017 | 765.2 | 8.6% | 12,047 |
| 2018 | 2,682.3 | 30.6% | 8,206 |
| 2019 | 2,205.7 | 25.2% | 7,586 |
| 2020 | 2,479.3 | 28.1% | 7,306 |
| 2021 | 3,009.9 | 35.5% | 9,663 |
| 2022 | 3,061.6 | 36.0% | 9,479 |
| 2023 | 3,617 | 42.4% | 7,893 |
| 2024 | 3,312.7 | 39.3% | 8,011 |
| 2025 | 3,996.7 | 47.5% | 8,672 |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 2 | Conventional Steam Coal | ST | 594 | 478.9 | Oct 1985 | Operating | — | coming soon |
| 3CT | Natural Gas Fired Combined Cycle | CT | 369 | 310.2 | Dec 2017 | Operating | — | coming soon |
| 3ST | Natural Gas Fired Combined Cycle | CA | 231.3 | 170.5 | Dec 2017 | Operating | — | coming soon |
| 4 | Natural Gas Fired Combustion Turbine | GT | 594 | 416 | Sep 2026 | Operating | — | coming soon |
| 1 | Conventional Steam Coal | ST | 540 | 540 | Jun 1981 | Retired Dec 2020 | — | coming soon |
Owner / operator
Operator: Grand River Dam Authority. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Grand River Dam Authority | 100.0% | 1,788 MW |
Nearby plants
Within 80 km.
| Grand River Energy Center Solar | — | 0.4 km |
| Chouteau | 1,070 MW | 3.7 km |
| Markham | 128 MW | 10.7 km |
| Huckleberry Solar | 125 MW | 12 km |
| Mayes County Solar | 102 MW | 16.6 km |
| Saltbranch 2 | 73 MW | 16.6 km |