Registry, engineering, and operating metrics shown on a consistent EIA basis.
| Metric | Tenaska Gateway Generating Station | Freestone Energy Center |
|---|---|---|
| Capacity | 939.6 MW | 1,036 MW |
| Technology | Natural Gas Fired Combined Cycle | Natural Gas Fired Combined Cycle |
| Operator | Tenaska Gateway Partners Ltd | Freestone Power Generation LLC |
| Operating units | 4 | 6 |
| Latest 12-month generation | 4.33 TWh | 6.02 TWh |
| Latest complete-year capacity factor | 57.2% (2025) | 71.4% (2025) |
| National technology rank | #104 of 538 | #89 of 538 |
| Latest EIA report | 2026-06 | 2026-06 |