Registry, engineering, and operating metrics shown on a consistent EIA basis.
| Metric | Frontera Energy Center | Hidalgo Energy Center |
|---|---|---|
| Capacity | 529 MW | 551.3 MW |
| Technology | Natural Gas Fired Combined Cycle | Natural Gas Fired Combined Cycle |
| Operator | Frontera Generation Limited Partnership | Calpine Corp - Hidalgo |
| Operating units | 3 | 3 |
| Latest 12-month generation | 1.91 TWh | 2.85 TWh |
| Latest complete-year capacity factor | 42.3% (2025) | 56.4% (2025) |
| National technology rank | #300 of 538 | #286 of 538 |
| Latest EIA report | 2026-06 | 2026-06 |