Registry, engineering, and operating metrics shown on a consistent EIA basis.
| Metric | Perryman | Essential Power Rock Springs LLC |
|---|---|---|
| 492.3 MW | 795.6 MW | |
| Natural Gas Fired Combustion Turbine, Petroleum Liquids | Natural Gas Fired Combustion Turbine | |
| Constellation Power Source Generation, LLC | Essential Power Operating Services LLC | |
| 6 | 4 | |
| 375.7 GWh | 179.0 GWh | |
| 5.8% (2025) | 2.6% (2024) | |
| #167 of 825 | #29 of 825 | |
| 2026-06 | 2024-12 |