USUS Grid ExplorerInfrastructure intelligence
Preliminary 2025 facility recordOperating

North Fork, CA · EIA plant 344

Mammoth Pool

Mammoth Pool is a hydro power facility in North Fork, CA, with 190 MW of operating capacity.

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Operating capacity190 MW2 operating generators
Proposed capacity0 MW0 proposed generators
UtilitySouthern California Edison CoEIA-reported operator
Balancing authorityCISOCalifornia Independent System Operator

Capacity profile

Fuel and technology

Nameplate capacity
Operating
Hydro190 MW
ProposedNo proposed capacity reported
Reported technologiesConventional Hydroelectric

Nearby in CA

Related facilities

CA · 0.9 miBig Creek 875 MW →CA · 2.2 miBig Creek 267 MW →CA · 2.2 miBig Creek 2A110 MW →CA · 5.5 miBig Creek 188 MW →

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