Sierra Pacific Sonora
Wood biomass power plant in Tuolumne County, California. 7.5 MW of nameplate capacity across 1 generator, operated by Sierra Pacific Industries.
Also known as EIA plant 54517
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 7.5 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- April 2018First generator online
- Operator
- Sierra Pacific IndustriesEIA operator ID 17164
- Grid
- CAISOBalancing authority CISO
- Price nodes
- 1 CAISO nodeResource nodes with prices
- Location
- Tuolumne County, CA37.9664, −120.3178
- EIA plant ID
- 54517EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Sierra Pacific Sonora produces
Free · EIA-923Net generation, 2025
42.7 GWh
42,671 MWh, final
Capacity factor, 2025
64.9%
2024: 53.0%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
28.4–42.7
GWh a year. Low 2016, high 2025
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | 66,316 | Not reported | 12 of 12 |
| 2002 | 46,229 | Not reported | 12 of 12 |
| 2003 | 46,251 | Not reported | 12 of 12 |
| 2004 | 39,288 | Not reported | 12 of 12 |
| 2005 | 37,999 | Not reported | 12 of 12 |
| 2006 | 35,949 | Not reported | 12 of 12 |
| 2007 | 31,663 | Not reported | 12 of 12 |
| 2008 | 40,646 | Not reported | 12 of 12 |
| 2009 | 34,947 | Not reported | 12 of 12 |
| 2010 | Not reported | Not reported | 0 of 12 |
| 2011 | 7,817 | 11.9% | 12 of 12 |
| 2012 | 24,641 | 37.4% | 12 of 12 |
| 2013 | 25,122 | 38.2% | 12 of 12 |
| 2014 | 38,491 | 58.6% | 12 of 12 |
| 2015 | 31,574 | 48.1% | 12 of 12 |
| 2016 | 28,438 | 43.2% | 12 of 12 |
| 2017 | 29,646 | 45.1% | 12 of 12 |
| 2018 | 29,478 | Not reported | 12 of 12 |
| 2019 | 33,670 | 51.2% | 12 of 12 |
| 2020 | 38,663 | 58.7% | 12 of 12 |
| 2021 | 37,649 | 57.3% | 12 of 12 |
| 2022 | 39,397 | 60.0% | 12 of 12 |
| 2023 | 33,981 | 51.7% | 12 of 12 |
| 2024 | 34,900 | 53.0% | 12 of 12 |
| 2025 | 42,671 | 64.9% | 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 CAMPDNo EPA emissions units are linked to this plant.
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 |
|---|---|---|---|
| GEN3 | Wood/Wood Waste Biomass | 7.5 | April 2018 |
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 Sierra Pacific Industries 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.
300 analyst questions a month, plus MCP
Query Sierra Pacific Sonora and 14,224 other projects from Claude or your own tools. Free accounts get 1 question a day.
Power plants near Sierra Pacific Sonora
More plants operated by Sierra Pacific Industries
Questions about Sierra Pacific Sonora
How much power does Sierra Pacific Sonora produce?
Sierra Pacific Sonora reported 42,671 MWh (42.7 GWh) of net generation in 2025, a 64.9% capacity factor on 7.5 MW of nameplate capacity.
Where is Sierra Pacific Sonora?
Sierra Pacific Sonora is in Tuolumne County, California, at 37.9664, −120.3178. It is in the California Independent System Operator balancing area (CISO).
Who operates Sierra Pacific Sonora?
EIA-860M for August 2026 lists Sierra Pacific Industries as the operator (EIA operator ID 17164). The operator is not always the owner.
When did Sierra Pacific Sonora start operating?
Its first generator began operating in April 2018, according to EIA-860M.
Does InfraMap have power prices for Sierra Pacific Sonora?
Yes. InfraMap has CAISO day-ahead and real-time prices at 1 price node linked to Sierra Pacific Sonora, 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)
- 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