Registry, engineering, and operating metrics shown on a consistent EIA basis.
| Metric | Mountaineer | FirstEnergy Fort Martin Power Station |
|---|---|---|
| 1,300 MW | 1,152 MW | |
| Conventional Steam Coal | Conventional Steam Coal | |
| Appalachian Power Co | Monongahela Power Co | |
| 1 | 2 | |
| 6.83 TWh | 5.43 TWh | |
| 60.3% (2025) | 60.8% (2025) | |
| #57 of 206 | #67 of 206 | |
| 2026-06 | 2026-06 |