United States › Power plants › Hydroelectric plants › Oklahoma
HYDROELECTRIC PLANTSMarkham
Markham is a 128 MW operating hydroelectric plant in Mayes County, Oklahoma, operated by Grand River Dam Authority.
Generators
Each generating unit EIA lists at this plant.
| Unit | Technology | Capacity | Status |
|---|---|---|---|
| 1 | Conventional Hydroelectric | 32 MW | |
| 2 | Conventional Hydroelectric | 32 MW | |
| 3 | Conventional Hydroelectric | 32 MW | |
| 4 | Conventional Hydroelectric | 32 MW |
Plant details
- Operator
- Grand River Dam Authority
- Location
- Mayes County, Oklahoma
- Balancing authority
- SWPP
- Sector
- Electric Utility
- Capacity
- Operating: 128 MW
- First unit online
- May 1964
- EIA plant ID
- 2980
Location
36.2317, -95.1822
Nearby power plants
- SalinaHydroelectric plants · 259 MW · 4.9 mi
- ChouteauGas power plants · 1,070 MW · 5.3 mi
- GRECCoal power plants, Gas power plants · 1,788 MW · 6.6 mi
- Saltbranch Solar 1Solar farms · 73.0 MW · 7.4 mi
- Saltbranch 2Solar farms · 73.0 MW · 7.4 mi
- Twelvemile Solar 1Solar farms · 152 MW · 7.4 mi
- Twelvemile Solar 3Solar farms · 200 MW · 7.4 mi
- Twelvemile Solar 2Solar farms · 52.2 MW · 7.4 mi
- Huckleberry SolarSolar farms · 125 MW · 12.1 mi
- Mayes County SolarSolar farms · 102 MW · 14.2 mi
Source: U.S. Energy Information Administration, Form EIA-860M, September 2026. Planned dates are targets reported by the developer and often change. Report a problem