Otay Mesa Generating Project
Natural gas power plant in San Diego County, California. 710.7 MW of nameplate capacity across 3 generators, operated by Otay Mesa Energy Center LLC.
Also known as Otay Mesa Energy Center · EIA plant 55345
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Key facts
- Capacity
- 710.7 MWNameplate
- Generators
- 3 operatingEIA-860M, August 2026
- Operating since
- October 2009First generator online
- Operator
- Otay Mesa Energy Center LLCEIA operator ID 14274
- Grid
- CAISOBalancing authority CISO
- Price nodes
- 1 CAISO nodeResource nodes with prices
- Location
- San Diego County, CA32.5815, −116.9150
- EIA plant ID
- 55345EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Otay Mesa Generating Project produces
Free · EIA-923Net generation, 2025
1.63 TWh
1,629,902 MWh, final
Capacity factor, 2025
26.2%
2024: Not reported
January to July 2026
469 GWh
Provisional
Range, 2015 to 2025
0.5–3.6
TWh a year. Low 2018, high 2015
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | Not reported | Not reported | 0 of 12 |
| 2006 | Not reported | Not reported | 0 of 12 |
| 2007 | Not reported | Not reported | 0 of 12 |
| 2008 | Not reported | Not reported | 0 of 12 |
| 2009 | 791,646 | Not reported | 3 of 12 |
| 2010 | 2,161,883 | 35.8% | 12 of 12 |
| 2011 | 2,061,934 | 34.2% | 12 of 12 |
| 2012 | 3,663,753 | 60.6% | 12 of 12 |
| 2013 | 3,702,471 | Not reported | 12 of 12 |
| 2014 | 3,650,654 | 60.5% | 12 of 12 |
| 2015 | 3,602,985 | 59.7% | 12 of 12 |
| 2016 | 2,654,182 | 43.9% | 12 of 12 |
| 2017 | 2,151,697 | 35.7% | 12 of 12 |
| 2018 | 493,151 | 8.2% | 12 of 12 |
| 2019 | 751,803 | 12.5% | 12 of 12 |
| 2020 | 2,107,684 | 34.9% | 12 of 12 |
| 2021 | 2,127,016 | 35.3% | 12 of 12 |
| 2022 | 2,589,030 | 42.9% | 12 of 12 |
| 2023 | 2,179,145 | 36.1% | 12 of 12 |
| 2024 | 2,349,626 | Not reported | 12 of 12 |
| 2025 | 1,629,902 | 26.2% | 12 of 12 |
| 2026 (provisional, partial year) | 468,760 | 13.0% | 7 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · CAISOEmissions
Free · EPA CAMPDCO₂, 2025
695,086
US short tons. 2024: 997,909
SO₂, 2025
4
US short tons
NOx, 2025
43
US short tons
CO₂ per MWh, calculated
0.43 t
About 853 lb per MWh
2 of 2 EPA units reported CO₂ in 2025 (CTG-1, CTG-2), matched to EIA plant 55345 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSWithdrawal, 2024
Not reported
million gallons as reported; not used, see note
Consumption, 2024
Not reported
million gallons
Source
Not reported
Dry cooling
Watershed stress
Low · 0.316
USGS SUI, HUC12 Poggi Canyon-Otay River
0 of 12 cooling months report withdrawal. Dry cooling with no reported withdrawal; not tested. Consumption is below 5% of a large reported withdrawal, so the withdrawal is not used. Blank volumes are unreported, not zero.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1-01 | Natural Gas Fired Combined Cycle | 210.0 | October 2009 |
| 1-02 | Natural Gas Fired Combined Cycle | 210.0 | October 2009 |
| 1-03 | Natural Gas Fired Combined Cycle | 290.7 | October 2009 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Otay Mesa Energy Center LLC as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Questions about Otay Mesa Generating Project
How much power does Otay Mesa Generating Project produce?
Otay Mesa Generating Project reported 1,629,902 MWh (1.63 TWh) of net generation in 2025, a 26.2% capacity factor on 710.7 MW of nameplate capacity. From January to July 2026 it reported 469 GWh, which is provisional.
Where is Otay Mesa Generating Project?
Otay Mesa Generating Project is in San Diego County, California, at 32.5815, −116.9150. It is in the California Independent System Operator balancing area (CISO).
Who operates Otay Mesa Generating Project?
EIA-860M for August 2026 lists Otay Mesa Energy Center LLC as the operator (EIA operator ID 14274). The operator is not always the owner.
When did Otay Mesa Generating Project start operating?
Its first generator began operating in October 2009, according to EIA-860M.
Does InfraMap have power prices for Otay Mesa Generating Project?
Yes. InfraMap has CAISO day-ahead and real-time prices at 1 price node linked to Otay Mesa Generating Project, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- CAISO day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- EIA-923 cooling water 2024 and the USGS surface water supply and use index, Water years 2010-2020 (Oct 2009 to Sep 2020), mean of monthly values
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page