Registry, engineering, and operating metrics shown on a consistent EIA basis.
| Metric | Marcus Hook Energy LP | Hay Road |
|---|---|---|
| Capacity | 836.1 MW | 1,098.2 MW |
| Technology | Natural Gas Fired Combined Cycle | Natural Gas Fired Combined Cycle |
| Operator | Marcus Hook Energy LP | Calpine Mid-Atlantic Generation LLC |
| Operating units | 4 | 8 |
| Latest 12-month generation | 5.49 TWh | 2.36 TWh |
| Latest complete-year capacity factor | 76.7% (2025) | 22.6% (2025) |
| National technology rank | #132 of 538 | #80 of 538 |
| Latest EIA report | 2026-04 | 2026-04 |