Registry, engineering, and operating metrics shown on a consistent EIA basis.
| Metric | Sand Hill | Hays Energy Project |
|---|---|---|
| Capacity | 696.4 MW | 989 MW |
| Technology | Natural Gas Fired Combined Cycle, Natural Gas Fired Combustion Turbine | Natural Gas Fired Combined Cycle |
| Operator | Austin Energy | Hays Energy, LLC |
| Operating units | 8 | 4 |
| Latest 12-month generation | 1.79 TWh | 5.53 TWh |
| Latest complete-year capacity factor | 32.1% (2025) | 61.6% (2025) |
| National technology rank | #329 of 538 | #97 of 538 |
| Latest EIA report | 2026-06 | 2026-06 |