Registry, engineering, and operating metrics shown on a consistent EIA basis.
| Metric | Merrimack Merrimack County | S C Moore Grafton County |
|---|---|---|
| Capacity | 150.8 MW | 195.4 MW |
| Technology | Conventional Steam Coal, Petroleum Liquids | Conventional Hydroelectric |
| Operator | Granite Shore Power | Great River Hydro, LLC |
| Operating units | 4 | 5 |
| Latest 12-month generation | 115.9 GWh | 341.5 GWh |
| Latest complete-year capacity factor | 18.2% (2025) | 19.9% (2024) |
| National technology rank | #130 of 206 | #71 of 1,349 |
| Latest EIA report | 2026-04 | 2024-12 |
Generation comes from EIA-923. Capacity, unit counts, technology, and reporting relationships come from EIA-860. Incomplete reporting years are excluded from capacity-factor comparisons.