Muck Valley Hydroelectric
Hydro power plant in Lassen County, California. 29.9 MW of nameplate capacity across 1 generator, operated by Malacha Hydro Limited Partnership.
Also known as EIA plant 10458
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 29.9 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- December 1988First generator online
- Operator
- Malacha Hydro Limited PartnershipEIA operator ID 67573
- Grid
- CAISOBalancing authority CISO
- Price nodes
- 1 CAISO nodeResource nodes with prices
- Location
- Lassen County, CA40.9764, −121.2558
- EIA plant ID
- 10458EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Muck Valley Hydroelectric produces
Free · EIA-923Net generation, 2025
89.8 GWh
89,795 MWh, final
Capacity factor, 2025
34.3%
2024: 31.2%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
10.0–93.2
GWh a year. Low 2021, high 2017
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | 19,088 | Not reported | 12 of 12 |
| 2002 | 42,086 | Not reported | 12 of 12 |
| 2003 | 64,809 | Not reported | 12 of 12 |
| 2004 | 66,641 | Not reported | 12 of 12 |
| 2005 | 70,921 | Not reported | 12 of 12 |
| 2006 | 111,580 | Not reported | 12 of 12 |
| 2007 | 22,345 | Not reported | 12 of 12 |
| 2008 | 42,392 | Not reported | 12 of 12 |
| 2009 | 32,066 | Not reported | 12 of 12 |
| 2010 | 30,561 | 11.7% | 12 of 12 |
| 2011 | 104,991 | 40.1% | 12 of 12 |
| 2012 | 29,435 | 11.2% | 12 of 12 |
| 2013 | 39,313 | 15.0% | 12 of 12 |
| 2014 | 10,294 | 3.9% | 12 of 12 |
| 2015 | 17,189 | 6.6% | 12 of 12 |
| 2016 | 88,172 | 33.6% | 12 of 12 |
| 2017 | 93,227 | 35.6% | 12 of 12 |
| 2018 | 47,996 | 18.3% | 12 of 12 |
| 2019 | 83,310 | 31.8% | 12 of 12 |
| 2020 | 18,167 | 6.9% | 12 of 12 |
| 2021 | 10,025 | 3.8% | 12 of 12 |
| 2022 | 17,132 | 6.5% | 12 of 12 |
| 2023 | 82,826 | 31.6% | 12 of 12 |
| 2024 | 81,813 | 31.2% | 12 of 12 |
| 2025 | 89,795 | 34.3% | 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. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| GEN1 | Conventional Hydroelectric | 29.9 | December 1988 |
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 Malacha Hydro Limited Partnership as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
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Questions about Muck Valley Hydroelectric
How much power does Muck Valley Hydroelectric produce?
Muck Valley Hydroelectric reported 89,795 MWh (89.8 GWh) of net generation in 2025, a 34.3% capacity factor on 29.9 MW of nameplate capacity.
Where is Muck Valley Hydroelectric?
Muck Valley Hydroelectric is in Lassen County, California, at 40.9764, −121.2558. It is in the California Independent System Operator balancing area (CISO).
Who operates Muck Valley Hydroelectric?
EIA-860M for August 2026 lists Malacha Hydro Limited Partnership as the operator (EIA operator ID 67573). The operator is not always the owner.
When did Muck Valley Hydroelectric start operating?
Its first generator began operating in December 1988, according to EIA-860M.
Does InfraMap have power prices for Muck Valley Hydroelectric?
Yes. InfraMap has CAISO day-ahead and real-time prices at 1 price node linked to Muck Valley Hydroelectric, 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