Larkspur Energy Facility
Natural gas power plant in San Diego County, California. 99.8 MW of nameplate capacity across 2 generators, operated by Diamond Generating Corporation.
Also known as EIA plant 55542
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 99.8 MWNameplate
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- July 2001First generator online
- Operator
- Diamond Generating CorporationEIA operator ID 49981
- Grid
- CAISOBalancing authority CISO
- Price nodes
- 2 CAISO nodesResource nodes with prices
- Location
- San Diego County, CA32.5670, −116.9442
- EIA plant ID
- 55542EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Larkspur Energy Facility produces
Free · EIA-923Net generation, 2025
23.0 GWh
23,036 MWh, final
Capacity factor, 2025
2.6%
2024: 2.8%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
23.0–65.4
GWh a year. Low 2025, 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 | 49,297 | Not reported | 12 of 12 |
| 2003 | 31,632 | Not reported | 12 of 12 |
| 2004 | 37,416 | Not reported | 12 of 12 |
| 2005 | 30,617 | Not reported | 12 of 12 |
| 2006 | 22,821 | Not reported | 12 of 12 |
| 2007 | 4,500 | Not reported | 1 of 12 |
| 2008 | 63,213 | Not reported | 12 of 12 |
| 2009 | 59,748 | Not reported | 12 of 12 |
| 2010 | 47,700 | 5.5% | 12 of 12 |
| 2011 | 33,548 | 3.8% | 12 of 12 |
| 2012 | 70,034 | 8.0% | 12 of 12 |
| 2013 | 86,781 | Not reported | 12 of 12 |
| 2014 | 77,799 | 8.9% | 12 of 12 |
| 2015 | 65,350 | 7.5% | 12 of 12 |
| 2016 | 46,403 | 5.3% | 12 of 12 |
| 2017 | 50,106 | 5.7% | 12 of 12 |
| 2018 | 44,783 | 5.1% | 12 of 12 |
| 2019 | 52,624 | 6.0% | 12 of 12 |
| 2020 | 34,385 | 3.9% | 12 of 12 |
| 2021 | 29,988 | 3.4% | 12 of 12 |
| 2022 | 33,459 | 3.8% | 12 of 12 |
| 2023 | 38,726 | 4.4% | 12 of 12 |
| 2024 | 24,443 | 2.8% | 12 of 12 |
| 2025 | 23,036 | 2.6% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 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
14,796
US short tons. 2024: 15,801
SO₂, 2025
0
US short tons
NOx, 2025
2
US short tons
CO₂ per MWh, calculated
0.64 t
About 1,285 lb per MWh
2 of 2 EPA units reported CO₂ in 2025 (1, 2), matched to EIA plant 55542 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, USGSNo EIA cooling-water record for this plant in 2024.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| CTG1 | Natural Gas Fired Combustion Turbine | 49.9 | July 2001 |
| CTG2 | Natural Gas Fired Combustion Turbine | 49.9 | July 2001 |
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 Diamond Generating Corporation 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 Larkspur Energy Facility
How much power does Larkspur Energy Facility produce?
Larkspur Energy Facility reported 23,036 MWh (23.0 GWh) of net generation in 2025, a 2.6% capacity factor on 99.8 MW of nameplate capacity.
Where is Larkspur Energy Facility?
Larkspur Energy Facility is in San Diego County, California, at 32.5670, −116.9442. It is in the California Independent System Operator balancing area (CISO).
Who operates Larkspur Energy Facility?
EIA-860M for August 2026 lists Diamond Generating Corporation as the operator (EIA operator ID 49981). The operator is not always the owner.
When did Larkspur Energy Facility start operating?
Its first generator began operating in July 2001, according to EIA-860M.
Does InfraMap have power prices for Larkspur Energy Facility?
Yes. InfraMap has CAISO day-ahead and real-time prices at 2 price nodes linked to Larkspur Energy Facility, 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
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page