McClain Energy Facility
Natural gas power plant · McClain County, Oklahoma
Nameplate capacity
551 MW
Rank in Oklahoma
#17
of 147 plants
In service since
2001
June 2001
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Fired Combined Cycle
- Operator
- Oklahoma Gas & Electric Co
- County
- McClain County
- Generating units
- 3
- Share of state capacity
- 1.51%
- Rank among natural gas plants in Oklahoma
- #12 of 33
- EIA plant code
- 55457
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| ST1 | Natural Gas Fired Combined Cycle | 198 MW | 175 MW | 2001 | Operating |
| CT1 | Natural Gas Fired Combined Cycle | 177 MW | 156 MW | 2001 | Operating |
| CT2 | Natural Gas Fired Combined Cycle | 177 MW | 156 MW | 2001 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Oklahoma
| Wagon Wheel Wind | Wind | 598 MW |
| Horseshoe Lake | Natural gas | 564 MW |
| Anadarko Plant | Natural gas | 540 MW |
| Mustang | Natural gas | 465 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 551 MW solar plant and a 551 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Oklahoma power plants · What Oklahoma actually generates