Diamond Valley Lake
Hydro power plant in Riverside County, California. 29.7 MW of nameplate capacity across 9 generators, operated by Metropolitan Water District of S CA.
Also known as EIA plant 7942
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 29.7 MWNameplate
- Generators
- 9 operatingEIA-860M, August 2026
- Operating since
- May 2001First generator online
- Operator
- Metropolitan Water District of S CAEIA operator ID 12397
- Grid
- CAISOBalancing authority CISO
- Price nodes
- 1 CAISO nodeResource nodes with prices
- Location
- Riverside County, CA33.6808, −117.0698
- EIA plant ID
- 7942EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Diamond Valley Lake produces
Free · EIA-923Net generation, 2025
1.30 GWh
1,295 MWh, final
Capacity factor, 2025
0.5%
2024: 2.1%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
0.0–23.7
GWh a year. Low 2023, high 2017
| 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 | 7,148 | Not reported | 12 of 12 |
| 2003 | 35,866 | Not reported | 12 of 12 |
| 2004 | 40,105 | Not reported | 12 of 12 |
| 2005 | 11,331 | Not reported | 12 of 12 |
| 2006 | 33,831 | Not reported | 12 of 12 |
| 2007 | 41,607 | Not reported | 12 of 12 |
| 2008 | 30,176 | Not reported | 12 of 12 |
| 2009 | 12,182 | Not reported | 12 of 12 |
| 2010 | 4,032 | 1.5% | 12 of 12 |
| 2011 | 34,552 | 13.3% | 12 of 12 |
| 2012 | 64,910 | 24.9% | 12 of 12 |
| 2013 | 22,347 | 8.6% | 12 of 12 |
| 2014 | 25,144 | Not reported | 12 of 12 |
| 2015 | 7,298 | 2.8% | 12 of 12 |
| 2016 | 1,664 | 0.6% | 12 of 12 |
| 2017 | 23,715 | 9.1% | 12 of 12 |
| 2018 | 3,725 | 1.4% | 12 of 12 |
| 2019 | 18,104 | 7.0% | 12 of 12 |
| 2020 | 20,151 | 7.7% | 12 of 12 |
| 2021 | 4,405 | 1.7% | 12 of 12 |
| 2022 | 2,921 | 1.1% | 12 of 12 |
| 2023 | 0 | 0.0% | 12 of 12 |
| 2024 | 5,436 | 2.1% | 12 of 12 |
| 2025 | 1,295 | 0.5% | 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 |
|---|---|---|---|
| 2 | Conventional Hydroelectric | 3.3 | May 2001 |
| 3 | Conventional Hydroelectric | 3.3 | May 2001 |
| 4 | Conventional Hydroelectric | 3.3 | May 2001 |
| 6 | Conventional Hydroelectric | 3.3 | December 2001 |
| 7 | Conventional Hydroelectric | 3.3 | December 2001 |
| 8 | Conventional Hydroelectric | 3.3 | December 2001 |
| 10 | Conventional Hydroelectric | 3.3 | December 2001 |
| 11 | Conventional Hydroelectric | 3.3 | December 2001 |
| 12 | Conventional Hydroelectric | 3.3 | December 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 Metropolitan Water District of S CA 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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Power plants near Diamond Valley Lake
More plants operated by Metropolitan Water District of S CA
Questions about Diamond Valley Lake
How much power does Diamond Valley Lake produce?
Diamond Valley Lake reported 1,295 MWh (1.30 GWh) of net generation in 2025, a 0.5% capacity factor on 29.7 MW of nameplate capacity.
Where is Diamond Valley Lake?
Diamond Valley Lake is in Riverside County, California, at 33.6808, −117.0698. It is in the California Independent System Operator balancing area (CISO).
Who operates Diamond Valley Lake?
EIA-860M for August 2026 lists Metropolitan Water District of S CA as the operator (EIA operator ID 12397). The operator is not always the owner.
When did Diamond Valley Lake start operating?
Its first generator began operating in May 2001, according to EIA-860M.
Does InfraMap have power prices for Diamond Valley Lake?
Yes. InfraMap has CAISO day-ahead and real-time prices at 1 price node linked to Diamond Valley Lake, 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