Registry, engineering, and operating metrics shown on a consistent EIA basis.
| Metric | Oak Grove (TX) | Limestone |
|---|---|---|
| Capacity | 1,795.4 MW | 1,849.8 MW |
| Technology | Conventional Steam Coal | Conventional Steam Coal |
| Operator | Luminant Generation Company LLC | NRG Texas Power LLC |
| Operating units | 2 | 2 |
| Latest 12-month generation | 11.83 TWh | 6.75 TWh |
| Latest complete-year capacity factor | 70.3% (2025) | 46.4% (2025) |
| National technology rank | #25 of 206 | #22 of 206 |
| Latest EIA report | 2026-06 | 2026-06 |