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710.7 MW Natural Gas operating in San Diego, CA — California Independent System Operator
710.7 MW
Nameplate Capacity
3
Generators
units
Natural Gas Fired Combined Cycle
Technology
2009
Operating Since
Coordinates
32.5815, -116.9150
County
San Diego, CA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Otay Mesa Energy Center LLC | Otay Mesa Energy Center | — |
| Owner(s) | Otay Mesa Energy Center LLC | Constellation Energy | — |
| Status | Operating | — | — |
The Otay Mesa Generating Project is a 710.7 MW natural gas-fired combined cycle power plant located in San Diego County, California. The plant began operating in 2009 and consists of 3 generators. It is owned by Constellation Energy and operated by Otay Mesa Energy Center LLC. The plant is interconnected to the California Independent System Operator (CAISO) grid and falls within the Western Electricity Coordinating Council (WECC) NERC region.
In the most recent year of data, the Otay Mesa Generating Project produced 1,629,902 MWh of electricity, operating at a capacity factor of 26.2%. The plant is a significant contributor to California's power supply, ranking as the 14th largest out of 76 power plants in the state and 302nd largest out of 945 plants nationally. Recent news coverage indicates at least one regulatory issue affecting the plant.
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
84.9K MWh
Latest Month
1.6M MWh
Annual Generation
26.2%
Capacity Factor
CO₂ Intensity
848 lb/MWh
NOx
0.045 lb/MWh
SO₂
0.004 lb/MWh
CH₄
0.016 lb/MWh
N₂O
0.002 lb/MWh
Capacity Factor
36.1%
Annual Net Gen
2179 GWh
CO₂eq
849 lb/MWh
Subregion
WECC California
2013
$965/kW
Est. Construction Cost
Total estimated cost: $685.9M
Market Position
ISO/RTO Market
CAISO
LMP Node
—
Pricing Hub
TH_SP15_GEN-APND
Node Source
Shared substation inference
Last updated 2026-03-14
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