CD4 — Plant Summary
- EIA Plant ID
- 63490
- Capacity
- 44.4 MW
- Primary Fuel
- Geothermal
- Technology
- Geothermal
- Status
- Operating
- Location
- Mono, CA
- Operating Since
- 2022
- Generators
- 1
- Operator
- CD4
- Parent Company
- —
- Annual Generation
- 276,936 MWh
- Capacity Factor
- 71.0%
- Balancing Authority
- California Independent System Operator
- ISO/RTO
- CAISO
- NERC Region
- WECC
CD4
OperatingGeothermal
Ranked #21 of 33 Geothermal plants in CA#30 of 70 nationally
44.4 MW Geothermal operating in Mono, CA — California Independent System Operator
EIAGEMWD
44.4 MW
Nameplate Capacity
1
Generators
unit
Geothermal
Technology
2022
Operating Since
Location
Coordinates
37.6461, -118.9158
County
Mono, CA
Nearby Plants
- Mammoth G1Geothermal10 MW · 0.2 km
- Mammoth G3Geothermal15 MW · 0.5 km
- Mammoth G2Geothermal15 MW · 0.6 km
Ownership & Operator
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 | CD4 | Ormat Technology | — |
| Owner(s) | CD4 | Ormat Technology Inc [100%] | — |
| Status | Operating | operating | — |
Ownership Chain
GEM identifies the owner as Ormat Technology Inc [100%]
This entity is not yet in the GEM ownership database — chain unavailable.
About
CD4 is a 44.4 MW geothermal power plant located in Mono County, California. The plant began operating in 2022 and has one generator. It is owned and operated by CD4. The plant's balancing authority is the California Independent System Operator (CAISO), and it falls within the Western Electricity Coordinating Council (WECC) NERC region.
In its latest year of operation, CD4 generated 276,936 MWh of electricity, achieving a capacity factor of 71.0%. The plant is ranked 21st out of 33 power plants in California and 30th out of 70 geothermal plants nationally.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
California Independent System Operator
Grid Voltage
115 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
25.7K MWh
Latest Month
276.9K MWh
Annual Generation
71.0%
Capacity Factor
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidencePoint of Interconnection
Nearest Substation
Mommoth Pacific 1
Substation Distance
0.011 km
Coord Source
OSM spatial
Market Position
ISO/RTO Market
CAISO
LMP Node
CONTROLX_1_N008
Pricing Hub
TH_SP15_GEN-APND
Secondary Zone
TH_NP15_GEN-APND
Location Type
Pricing Node
Node Source
Curated node match
News & Articles (10)Beta
General
Ormat Technologies signs ‘blend-and-extend’ amendment for CD4 geothermal plant
Ormat Technologies (ORA) announced the signing and approval of an amendments to the existing power purchase agreements with Central Coast...
TipRanks·4 days ago
Deals·ppa
Ormat signs amended PPA for Casa Diablo IV geothermal power plant in California
Ormat extends the period and capacity of PPAs with two community choice aggregators for the output of the Casa Diablo IV geothermal power...
Ormat (seller)
ThinkGeoEnergy·4 days ago
Deals·ppa
Ormat Technologies Announces Signing of ‘Blend-and-Extend’ Amendment for CD4 Geothermal Power Plant
Amended PPA Reflects ~27% Increase in Contract Pricing. Advertisement. Amended PPA Terms to Take Effect on October 1, 2026.
Ormat Technologies (seller)
The Manila Times·4 days ago
Deals·ppa
Ormat Technologies signs ‘blend-and-extend’ amendment for CD4 geothermal plant
Ormat Technologies (ORA) announced the signing and approval of an amendments to the existing power purchase agreements with Central Coast...
Ormat Technologies (seller)
TipRanks·4 days ago
Last updated 2026-03-14
View all 10 articles