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199.6 MW Natural Gas operating in Alameda, CA
199.6 MW
Nameplate Capacity
4
Generators
units
Natural Gas Fired Combustion Turbine
Technology
2012
Operating Since
Coordinates
37.7894, -121.6017
County
Alameda, CA
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Diamond Generating Corporation | — | — |
| Owner(s) | Diamond Generating Corporation | — | — |
| Status | Operating | — | — |
The Mariposa Energy Project is a 199.6 MW natural gas-fired power plant located in Alameda County, California. The plant began operating in 2012 and consists of four natural gas-fired combustion turbine generators. It is owned and operated by Diamond Generating Corporation. The plant is connected to the California Independent System Operator (CAISO) balancing authority, within the Western Electricity Coordinating Council (WECC) NERC region.
In its latest year of reported generation, the Mariposa Energy Project produced 29,135 MWh of electricity, operating at a capacity factor of 1.7%. The plant ranks 51st out of 76 power plants in California and 749th out of 945 plants nationally.
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
230.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
71 MWh
Latest Month
29.1K MWh
Annual Generation
1.7%
Capacity Factor
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CO₂ Intensity
1197 lb/MWh
NOx
0.141 lb/MWh
SO₂
0.005 lb/MWh
CH₄
0.022 lb/MWh
N₂O
0.002 lb/MWh
Capacity Factor
5.0%
Annual Net Gen
88 GWh
CO₂eq
1198 lb/MWh
Subregion
WECC California
2013
$965/kW
Est. Construction Cost
Total estimated cost: $192.6M
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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Market Position
ISO/RTO Market
CAISO
LMP Node
KELSO1_7_N001
Pricing Hub
TH_NP15_GEN-APND
Location Type
Pricing Node
Node Source
Curated node match
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
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