Registry, engineering, and operating metrics shown on a consistent EIA basis.
| Metric | Magic Valley Generating Station Hidalgo County | Nueces Bay Nueces County |
|---|---|---|
| Capacity | 801 MW | 730.2 MW |
| Technology | Natural Gas Fired Combined Cycle | Natural Gas Fired Combined Cycle |
| Operator | Calpine Corp-Magic Valley | City of San Antonio - (TX) |
| Operating units | 3 | 5 |
| Latest 12-month generation | 1.79 TWh | 1.66 TWh |
| Latest complete-year capacity factor | 31.8% (2025) | 28.5% (2025) |
| National technology rank | #144 of 538 | #163 of 538 |
| Latest EIA report | 2026-04 | 2026-04 |
Generation comes from EIA-923. Capacity, unit counts, technology, and reporting relationships come from EIA-860. Incomplete reporting years are excluded from capacity-factor comparisons.