Haiwee Pumped Storage ProjectPlanned
Inyo County, California · EIA plant ID 66686 · Operator: Premium Energy Holdings
1,000 MW planned (Hydroelectric Pumped Storage), first expected Jul 2028 · EIA-860M
Nameplate—MWSummer — MW
Generators0in service
Net generation—GWh12 mo
Capacity factor—no 923 generation in the last 12 months
Heat rate—thermal plants only
First online—
Capacity factor by year
Net MWh ÷ (summer MW × hours), primary-fuel units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
No capacity factor available.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| HL001 | Hydroelectric Pumped Storage | PS | 250 | 250 | planned Jul 2028 | Planned | — | coming soon |
| HL002 | Hydroelectric Pumped Storage | PS | 250 | 250 | planned Jul 2028 | Planned | — | coming soon |
| HL003 | Hydroelectric Pumped Storage | PS | 250 | 250 | planned Jul 2028 | Planned | — | coming soon |
| HL004 | Hydroelectric Pumped Storage | PS | 250 | 250 | planned Jul 2028 | Planned | — | coming soon |
Owner / operator
Operator: Premium Energy Holdings. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
Nearby plants
Within 80 km.
| Munro Valley Solar | 4 MW | 4.6 km |
| Owens Valley Solar Project 11 | 1 MW | 6.5 km |
| Haiwee | 6 MW | 13.7 km |
| Cottonwood | 2 MW | 24.5 km |
| Coso Finance Partners | 92 MW | 26.3 km |
| Mordor ES2 | 20 MW | 28.3 km |