Gregory Power Plant
Natural gas power plant · San Patricio County, Texas
Nameplate capacity
470 MW
Rank in Texas
#115
of 1,071 plants
In service since
2000
July 2000
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Fired Combined Cycle
- Operator
- Gregory Power Partners LLC
- County
- San Patricio County
- Generating units
- 3
- Share of state capacity
- 0.23%
- Rank among natural gas plants in Texas
- #79 of 310
- EIA plant code
- 55086
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| GT1A | Natural Gas Fired Combined Cycle | 185 MW | 141 MW | 2000 | Operating |
| GT1B | Natural Gas Fired Combined Cycle | 185 MW | 140 MW | 2000 | Operating |
| STG | Natural Gas Fired Combined Cycle | 100 MW | 85 MW | 2000 | 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 Texas
| Mockingbird Solar Center | Solar | 471 MW |
| Azure Sky Wind Project, LLC Hybrid | Wind | 470 MW |
| Eastman Cogeneration Facility | Natural gas | 468 MW |
| Roadrunner, LLC Hybrid | Solar | 463 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 470 MW solar plant and a 470 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 Texas power plants · What Texas actually generates