Registry, engineering, and operating metrics shown on a consistent EIA basis.
| Metric | San Miguel | J K Spruce |
|---|---|---|
| Capacity | 410 MW | 1,488.5 MW |
| Technology | Conventional Steam Coal | Conventional Steam Coal |
| Operator | San Miguel Electric Coop, Inc | City of San Antonio - (TX) |
| Operating units | 1 | 2 |
| Latest 12-month generation | 1.41 TWh | 6.19 TWh |
| Latest complete-year capacity factor | 39.6% (2025) | 49.6% (2025) |
| National technology rank | #134 of 206 | #43 of 206 |
| Latest EIA report | 2026-06 | 2026-06 |