Hays Energy Project
Natural gas power plant · Hays County, Texas
Nameplate capacity
989 MW
Rank in Texas
#35
of 1,071 plants
In service since
2002
April 2002
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Fired Combined Cycle
- Operator
- Hays Energy, LLC
- County
- Hays County
- Generating units
- 4
- Share of state capacity
- 0.49%
- Rank among natural gas plants in Texas
- #23 of 310
- EIA plant code
- 55144
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| U3 | Natural Gas Fired Combined Cycle | 253 MW | 231 MW | 2002 | Operating |
| U4 | Natural Gas Fired Combined Cycle | 253 MW | 234 MW | 2002 | Operating |
| U1 | Natural Gas Fired Combined Cycle | 242 MW | 234 MW | 2002 | Operating |
| U2 | Natural Gas Fired Combined Cycle | 242 MW | 232 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
| Sandy Creek Energy Station | Coal | 1,008 MW |
| Montgomery County | Natural gas | 1,000 MW |
| Tenaska Frontier Generation Station | Natural gas | 940 MW |
| Tenaska Gateway Generating Station | Natural gas | 940 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 989 MW solar plant and a 989 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