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15 MW Geothermal operating in Mono, CA
15 MW
Nameplate Capacity
3
Generators
units
Geothermal
Technology
1990
Operating Since
Coordinates
37.6464, -118.9092
County
Mono, CA
Nearby Plants
Forward-looking, asset-specific exposure analytics combining climate hazards, generation variability, and counterparty risk into a single decision-grade view. Powered by InfraRisk.
See the full risk decomposition + scenarios for this asset.
Owner data does not fully agree across sources.
EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Ormat Nevada Inc | Ormat Technology Inc | — |
| Owner(s) | Mammoth Pacific LP | Ormat Technology Inc | — |
| Status | Operating | operating | — |
GEM identifies the owner as Ormat Technology Inc
This entity is not yet in the GEM ownership database — chain unavailable.
Mammoth G2 is a 15 MW geothermal power plant located in Mono County, California. The plant began operating in 1990 and has three generators utilizing geothermal technology. Ormat Nevada Inc. is the plant's operator.
The plant's latest annual generation was 82,307 MWh, resulting in a capacity factor of 62.5%. Mammoth G2 operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. It is ranked as the 29th largest power plant in California out of 33, and 61st nationally out of 70.
Generated from EIA, GEM, and public data sources
ISO/RTO
CAISO
Market
ISO/RTO Member
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
California Independent System Operator (CISO)
Grid Voltage
33.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Historic generation and capacity factor for this asset — the foundation for forward forecasts on the InfraSure platform.
7.9K MWh
Latest Month
82.3K MWh
Annual Generation
62.5%
Capacity Factor
Forward-looking generation outlook with probabilistic ranges across weather, demand, and policy scenarios. Powered by InfraSure's generation modeling stack.
See the full forecast + scenario decomposition for this asset.
CO₂ Intensity
0 lb/MWh
NOx
0.000 lb/MWh
SO₂
0.000 lb/MWh
CH₄
—
N₂O
—
Capacity Factor
47.4%
Annual Net Gen
62 GWh
CO₂eq
0.000 lb/MWh
Subregion
WECC California
2013
$2,851/kW
Est. Construction Cost
Total estimated cost: $42.8M
Forward revenue, DSCR bands, and refinancing risk projected under price, demand, and policy scenarios. Powered by InfraSure's asset cashflow stack.
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Point of Interconnection
Nearest Substation
Mommoth Pacific 1
Substation Distance
0.579 km
Coord Source
OSM spatial
Market Position
ISO/RTO Market
CAISO
LMP Node
CONTROLX_1_N009
Pricing Hub
TH_SP15_GEN-APND
Alt. Hub / Zone
TH_NP15_GEN-APND
Location Type
Pricing Node
Node Source
Curated node match
Last updated 2026-03-26
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