Registry, engineering, and operating metrics shown on a consistent EIA basis.
| Metric | Edward C Hyatt | Helms Pumped Storage |
|---|---|---|
| 644.1 MW | 1,053 MW | |
| Conventional Hydroelectric, Hydroelectric Pumped Storage | Hydroelectric Pumped Storage | |
| California Dept. of Water Resources | Pacific Gas & Electric Co. | |
| 6 | 3 | |
| 2.08 TWh | 1.11 TWh | |
| 34.6% (2025) | — | |
| #39 of 1,349 | #8 of 39 | |
| 2026-06 | 2026-06 |