Planned pumped storage hydro plants in California
What EIA-860M's Planned sheet says is coming in California: 2 pumped storage hydro plants totalling 2 GW, each with the in-service year its developer reported and the construction status EIA records. A planned project is not a built one.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Planned projects
- 2
- 7 generating units
- Proposed capacity
- 2 GW
- Earliest in-service year
- 2027
- Latest in-service year
- 2028
Map of planned pumped storage hydro plants in California
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List of planned pumped storage hydro plants in California
| Haiwee Pumped Storage ProjectHydroelectric Pumped Storage | Premium Energy Holdings | Inyo | 1,000 | 4 | 2028 | Planned for installation |
| Whale Rock Pumped Storage Hydro ProjectHydroelectric Pumped Storage | Premium Energy Holdings | San Luis Obispo | 600 | 3 | 2027 | Planned for installation |
Where they are in the build
- Planned for installation2
Planned pumped storage hydro plants in California: FAQ
- How many pumped storage hydro plants are planned in California?
- 2, for 2 GW of nameplate capacity. These are generators developers have reported to EIA, not generators that exist.
- What do the status letters mean?
- EIA files each planned generator under a status: regulatory approvals pending, under construction at or below half complete, under construction more than half complete, construction complete but not yet in commercial operation, or planned but not yet started. Each row shows its own.
- Do these projects always get built?
- No. EIA keeps a separate Canceled or Postponed sheet, and projects move between the sheets month to month. This page is the Planned sheet for 2026-07 and nothing more.