San Dimas
Los Angeles County, California · EIA plant ID 6646 · Operator: Metropolitan Water District of S CA
Nameplate10MWSummer 10 MW
Generators1in service
Net generation10GWh12 mo to Dec 2025
Capacity factor12%hydro units, summer MW
Heat rate—thermal plants only
First online1981
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) |
|---|---|---|---|
| 2001 | 33.9 | 38.7% | — |
| 2002 | 45.3 | 51.7% | — |
| 2003 | 63.2 | 72.2% | — |
| 2004 | 65.4 | 126.3% | — |
| 2005 | 55.7 | 107.8% | — |
| 2006 | 63.9 | 123.6% | — |
| 2007 | 49.7 | 96.2% | — |
| 2008 | 23.7 | 27.2% | — |
| 2009 | 0 | 0.0% | — |
| 2010 | 37.1 | 42.7% | — |
| 2011 | 53.1 | 61.2% | — |
| 2012 | 42.7 | 49.1% | — |
| 2013 | 21.6 | 24.9% | — |
| 2014 | 2.9 | 3.4% | — |
| 2015 | 24.2 | 27.9% | — |
| 2016 | 38.6 | 44.3% | — |
| 2017 | 54.1 | 62.4% | — |
| 2018 | 27.1 | 31.2% | — |
| 2019 | 35.8 | 41.3% | — |
| 2020 | 5.1 | 5.8% | — |
| 2021 | 0 | 0.0% | — |
| 2022 | 4 | 4.7% | — |
| 2023 | 24.6 | 28.4% | — |
| 2024 | 0 | 0.0% | — |
| 2025 | 10.3 | 11.9% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | HY | 9.9 | 9.9 | Jun 1981 | Operating | — | 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% | 10 MW |
Nearby plants
Within 80 km.
| San Dimas Wash Generating Station | 1 MW | 0.9 km |
| Weymouth Solar Plant | 3 MW | 2.4 km |
| Gilead Sciences La Verne Rooftop Solar | 3 MW | 3.7 km |
| VESI Pomona | 40 MW | 7.8 km |
| San Gabriel Hydro Project | 5 MW | 10.2 km |
| Azusa | 3 MW | 10.9 km |