Rio Nogales Power Project
Natural gas power plant · Guadalupe County, Texas
Nameplate capacity
1,108 MW
Rank in Texas
#27
of 1,071 plants
In service since
2002
May 2002
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Fired Combined Cycle
- Operator
- City of San Antonio - (TX)
- County
- Guadalupe County
- Generating units
- 4
- Share of state capacity
- 0.55%
- Rank among natural gas plants in Texas
- #17 of 310
- EIA plant code
- 55137
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| STG1 | Natural Gas Fired Combined Cycle | 439 MW | 303 MW | 2002 | Operating |
| CTG1 | Natural Gas Fired Combined Cycle | 224 MW | 166 MW | 2002 | Operating |
| CTG3 | Natural Gas Fired Combined Cycle | 224 MW | 166 MW | 2002 | Operating |
| CTG2 | Natural Gas Fired Combined Cycle | 222 MW | 166 MW | 2002 | 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
| Lamar Power Project | Natural gas | 1,113 MW |
| Newman | Natural gas | 1,110 MW |
| Guadalupe Generating Station | Natural gas | 1,088 MW |
| Barney M Davis | Natural gas | 1,082 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 1,108 MW solar plant and a 1,108 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