Elk Hills Power LLC
Natural gas power plant in Kern County, California. 623 MW of nameplate capacity across 3 generators, operated by Elk Hills Power LLC.
Also known as EIA plant 55400
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Key facts
- Capacity
- 623 MWNameplate
- Generators
- 3 operatingEIA-860M, August 2026
- Operating since
- July 2003First generator online
- Operator
- Elk Hills Power LLCEIA operator ID 34164
- Grid
- CAISOBalancing authority CISO
- Price nodes
- 1 CAISO nodeResource nodes with prices
- Location
- Kern County, CA35.2803, −119.4707
- EIA plant ID
- 55400EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Elk Hills Power produces
Free · EIA-923Net generation, 2025
3.13 TWh
3,131,218 MWh, final
Capacity factor, 2025
57.4%
2024: 39.0%
January to July 2026
1.24 TWh
Provisional
Range, 2015 to 2025
2.1–4.0
TWh a year. Low 2024, high 2015
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | 359,660 | Not reported | 12 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | 1,847,789 | Not reported | 6 of 12 |
| 2004 | 3,979,415 | Not reported | 12 of 12 |
| 2005 | 3,590,648 | Not reported | 12 of 12 |
| 2006 | 3,456,224 | Not reported | 12 of 12 |
| 2007 | 3,731,938 | Not reported | 12 of 12 |
| 2008 | 3,551,893 | Not reported | 12 of 12 |
| 2009 | 3,452,893 | Not reported | 12 of 12 |
| 2010 | 3,753,117 | 68.8% | 12 of 12 |
| 2011 | 3,238,754 | 59.3% | 12 of 12 |
| 2012 | 3,485,986 | 63.7% | 12 of 12 |
| 2013 | 3,913,619 | 71.7% | 12 of 12 |
| 2014 | 3,924,149 | Not reported | 12 of 12 |
| 2015 | 3,961,595 | Not reported | 12 of 12 |
| 2016 | 3,442,847 | 62.9% | 12 of 12 |
| 2017 | 3,805,944 | 69.7% | 12 of 12 |
| 2018 | 3,797,551 | 69.6% | 12 of 12 |
| 2019 | 3,845,666 | 70.5% | 12 of 12 |
| 2020 | 3,373,700 | 61.6% | 12 of 12 |
| 2021 | 3,778,136 | 69.2% | 12 of 12 |
| 2022 | 3,686,883 | 67.6% | 12 of 12 |
| 2023 | 3,775,457 | 69.2% | 12 of 12 |
| 2024 | 2,134,875 | 39.0% | 12 of 12 |
| 2025 | 3,131,218 | 57.4% | 12 of 12 |
| 2026 (provisional, partial year) | 1,243,227 | 39.2% | 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
1.23M
US short tons. 2024: 827,340
SO₂, 2025
6
US short tons
NOx, 2025
73
US short tons
CO₂ per MWh, calculated
0.39 t
About 783 lb per MWh
2 of 2 EPA units reported CO₂ in 2025 (CTG-1, CTG-2), matched to EIA plant 55400 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
384
million gallons
Consumption, 2024
384
million gallons
Source
West Kern Water District
Ground, Other. Induced-draft tower
Watershed stress
Severe · 0.858
USGS SUI, HUC12 180300121204-Kern River Flood Canal
12 of 12 cooling months report withdrawal. Groundwater user; SUI describes surface water and is context only. Blank volumes are unreported, not zero.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| CTG1 | Natural Gas Fired Combined Cycle | 199.0 | July 2003 |
| CTG2 | Natural Gas Fired Combined Cycle | 199.0 | July 2003 |
| STG | Natural Gas Fired Combined Cycle | 225.0 | July 2003 |
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 Elk Hills Power 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 Elk Hills Power
How much power does Elk Hills Power LLC produce?
Elk Hills Power LLC reported 3,131,218 MWh (3.13 TWh) of net generation in 2025, a 57.4% capacity factor on 623 MW of nameplate capacity. From January to July 2026 it reported 1.24 TWh, which is provisional.
Where is Elk Hills Power LLC?
Elk Hills Power LLC is in Kern County, California, at 35.2803, −119.4707. It is in the California Independent System Operator balancing area (CISO).
Who operates Elk Hills Power LLC?
EIA-860M for August 2026 lists Elk Hills Power LLC as the operator (EIA operator ID 34164). The operator is not always the owner.
When did Elk Hills Power LLC start operating?
Its first generator began operating in July 2003, according to EIA-860M.
Does InfraMap have power prices for Elk Hills Power LLC?
Yes. InfraMap has CAISO day-ahead and real-time prices at 1 price node linked to Elk Hills Power LLC, 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
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page