Registry, engineering, and operating metrics shown on a consistent EIA basis.
| Metric | Vienna Operations | Commonwealth Chesapeake |
|---|---|---|
| Capacity | 180.6 MW | 402.5 MW |
| Technology | Petroleum Liquids | Petroleum Liquids |
| Operator | NRG Vienna Operations Inc | Commonwealth Chesapeake Co LLC |
| Operating units | 2 | 7 |
| Latest 12-month generation | 4.6 GWh | 92.3 GWh |
| Latest complete-year capacity factor | 0.3% (2024) | 1.3% (2025) |
| National technology rank | #34 of 705 | #16 of 705 |
| Latest EIA report | 2024-12 | 2026-04 |