Registry, engineering, and operating metrics shown on a consistent EIA basis.
| Metric | Rolling Hills Generating Vinton County | Hanging Rock Energy Facility Lawrence County |
|---|---|---|
| Capacity | 977.5 MW | 1,429.8 MW |
| Technology | Natural Gas Fired Combustion Turbine | Natural Gas Fired Combined Cycle |
| Operator | Rolling Hills Generating LLC | Dynegy Hanging Rock Energy Facility |
| Operating units | 5 | 6 |
| Latest 12-month generation | 2.20 TWh | 10.26 TWh |
| Latest complete-year capacity factor | 25.6% (2024) | 81.5% (2025) |
| National technology rank | #16 of 825 | #27 of 538 |
| Latest EIA report | 2024-12 | 2026-04 |
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.