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Preliminary 2025 facility recordProposed

Cayucos, CA · EIA plant 66685

Whale Rock Pumped Storage Hydro Project

Whale Rock Pumped Storage Hydro Project is a hydro power facility in Cayucos, CA, with 600 MW of proposed capacity.

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Operating capacity0 MW0 operating generators
Proposed capacity600 MW3 proposed generators
UtilityPremium Energy HoldingsEIA-reported operator
Balancing authorityCISOCalifornia Independent System Operator

Capacity profile

Fuel and technology

Nameplate capacity
OperatingNo operating capacity reported
Proposed
Hydro600 MW
Reported technologiesHydroelectric Pumped Storage

Nearby in CA

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Source quality

Preliminary facility data

This page uses the EIA-860 2025 Early Release. EIA identifies the release as preliminary, so it should not be used for official state or national aggregation. Capacity is nameplate capacity, not real-time output or annual generation.

Read methodologyEIA-860 source