Otay Mesa Generating Project
San Diego County, California · EIA plant ID 55345 · Operator: Otay Mesa Energy Center LLC
Nameplate711MWSummer 593 MW
Generators3in service
Net generation1,194GWh12 mo to Aug 2026
Capacity factor23%gas/coal/oil units, summer MW
Heat rate7,298Btu/kWhfossil units, electric fuel, HHV
First online2009Runs as intermediate
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), gas/coal/oil units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2009 | 791.6 | 62.8% | 7,097 |
| 2010 | 2,161.9 | 43.2% | 7,231 |
| 2011 | 2,061.9 | 41.2% | 7,524 |
| 2012 | 3,663.8 | 73.0% | 7,501 |
| 2013 | 3,702.5 | 74.0% | 7,115 |
| 2014 | 3,650.7 | 73.0% | 7,201 |
| 2015 | 3,603 | 72.0% | 7,181 |
| 2016 | 2,654.2 | 52.9% | 7,169 |
| 2017 | 2,151.7 | 43.0% | 7,292 |
| 2018 | 493.2 | 9.9% | 7,517 |
| 2019 | 751.8 | 15.0% | 7,303 |
| 2020 | 2,107.7 | 42.0% | 7,210 |
| 2021 | 2,127 | 42.5% | 7,223 |
| 2022 | 2,589 | 51.8% | 7,186 |
| 2023 | 2,179.1 | 43.2% | 7,116 |
| 2024 | 2,349.6 | 46.9% | 7,161 |
| 2025 | 1,629.9 | 31.4% | 7,199 |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 1-01 | Natural Gas Fired Combined Cycle | CT | 210 | 159.3 | Oct 2009 | Operating | — | coming soon |
| 1-02 | Natural Gas Fired Combined Cycle | CT | 210 | 156.6 | Oct 2009 | Operating | — | coming soon |
| 1-03 | Natural Gas Fired Combined Cycle | CA | 290.7 | 276.9 | Oct 2009 | Operating | — | coming soon |
Owner / operator
Operator: Otay Mesa Energy Center LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Otay Mesa Energy Center LLC | 100.0% | 711 MW |
Nearby plants
Within 80 km.
| Pio Pico Energy Center | 395 MW | 0.9 km |
| San Diego - EMDF at San Diego | 3 MW | 1.1 km |
| Gateway Energy Storage System | 250 MW | 1.3 km |
| Richard J Donovan Correctional Facility | 3 MW | 1.5 km |
| Amazon - SAN5 | 3 MW | 1.7 km |
| Amazon SAN3 Solar Project | 7 MW | 2.4 km |