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Preliminary 2025 facility recordOperating

Mammoth Lakes, CA · EIA plant 10479

Mammoth G3

Mammoth G3 is a geothermal power facility in Mammoth Lakes, CA, with 15 MW of operating capacity.

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Operating capacity15 MW3 operating generators
Proposed capacity0 MW0 proposed generators
UtilityOrmat Nevada IncEIA-reported operator
Balancing authorityCISOCalifornia Independent System Operator

Capacity profile

Fuel and technology

Nameplate capacity
Operating
Geothermal15 MW
ProposedNo proposed capacity reported
Reported technologiesGeothermal

Nearby in CA

Related facilities

CA · 0.1 miMammoth G215 MW →CA · 0.3 miMammoth G110 MW →CA · 0.3 miCD444 MW →CA · 14.4 miRush Creek13 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