Registry, engineering, and operating metrics shown on a consistent EIA basis.
| Metric | Millennium Power | Manchester Street |
|---|---|---|
| Capacity | 427.5 MW | 515 MW |
| Technology | Natural Gas Fired Combined Cycle | Natural Gas Fired Combined Cycle |
| Operator | Millennium Power Company, LLC | Manchester Street, LLC. |
| Operating units | 2 | 6 |
| Latest 12-month generation | 1.01 TWh | 2.05 TWh |
| Latest complete-year capacity factor | 22.8% (2025) | 43.3% (2025) |
| National technology rank | #322 of 538 | #308 of 538 |
| Latest EIA report | 2026-04 | 2026-04 |