Diamond Valley Lake
Riverside County, California · EIA plant ID 7942 · Operator: Metropolitan Water District of S CA
Nameplate30MWSummer 30 MW
Generators9in service
Net generation1GWh12 mo to Dec 2025
Capacity factor0%hydro units, summer MW
Heat rate—thermal plants only
First online2001
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), hydro units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2002 | 7.1 | 2.5% | — |
| 2003 | 35.9 | 11.4% | — |
| 2004 | 40.1 | 101.0% | — |
| 2005 | 11.3 | 28.6% | — |
| 2006 | 33.8 | 85.4% | — |
| 2007 | 41.6 | 105.6% | — |
| 2008 | 30.2 | 8.7% | — |
| 2009 | 12.2 | 4.7% | — |
| 2010 | 4 | 1.6% | — |
| 2011 | 34.6 | 13.3% | — |
| 2012 | 64.9 | 24.9% | — |
| 2013 | 22.3 | 8.6% | — |
| 2014 | 25.1 | 9.7% | — |
| 2015 | 7.3 | 2.8% | — |
| 2016 | 1.7 | 0.6% | — |
| 2017 | 23.7 | 9.1% | — |
| 2018 | 3.7 | 1.4% | — |
| 2019 | 18.1 | 7.0% | — |
| 2020 | 20.2 | 7.7% | — |
| 2021 | 4.4 | 1.7% | — |
| 2022 | 2.9 | 1.1% | — |
| 2023 | 0 | 0.0% | — |
| 2024 | 5.4 | 2.1% | — |
| 2025 | 1.3 | 0.5% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 10 | Conventional Hydroelectric | HY | 3.3 | 3.3 | Dec 2001 | Operating | — | coming soon |
| 11 | Conventional Hydroelectric | HY | 3.3 | 3.3 | Dec 2001 | Operating | — | coming soon |
| 12 | Conventional Hydroelectric | HY | 3.3 | 3.3 | Dec 2001 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 3.3 | 3.3 | May 2001 | Operating | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 3.3 | 3.3 | May 2001 | Operating | — | coming soon |
| 4 | Conventional Hydroelectric | HY | 3.3 | 3.3 | May 2001 | Operating | — | coming soon |
| 6 | Conventional Hydroelectric | HY | 3.3 | 3.3 | Dec 2001 | Operating | — | coming soon |
| 7 | Conventional Hydroelectric | HY | 3.3 | 3.3 | Dec 2001 | Operating | — | coming soon |
| 8 | Conventional Hydroelectric | HY | 3.3 | 3.3 | Dec 2001 | Operating | — | coming soon |
| 1 | Conventional Hydroelectric | HY | 3.3 | — | May 2001 | Retired Oct 2009 | — | coming soon |
| 5 | Conventional Hydroelectric | HY | 3.3 | — | Dec 2001 | Retired Oct 2009 | — | coming soon |
| 9 | Conventional Hydroelectric | HY | 3.3 | — | Dec 2001 | Retired Oct 2009 | — | coming soon |
Owner / operator
Operator: Metropolitan Water District of S CA. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Metropolitan Water District of S CA | 100.0% | 30 MW |
Nearby plants
Within 80 km.
| Diamond Valley Solar Project | 1 MW | 3.6 km |
| West Valley High School Solar | 1 MW | 7 km |
| AP North Lake I, LP | 20 MW | 8.6 km |
| Tahquitz High School | 1 MW | 10.8 km |
| Menifee Power Bank | 680 MW | 11.3 km |
| EMWD - Sun City RWRF | 2 MW | 13.9 km |