East Portal Generator
Los Angeles County, California · EIA plant ID 50375 · Operator: Calleguas Mun Water District
Nameplate1MWSummer 1 MW
Generators1in service
Net generation5GWh12 mo to Dec 2025
Capacity factor44%hydro units, summer MW
Heat rate—thermal plants only
First online1987
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 | 7.5 | 71.5% | — |
| 2002 | 6.1 | 58.5% | — |
| 2003 | 7.2 | 68.1% | — |
| 2004 | 6.4 | 60.8% | — |
| 2005 | 4.9 | 46.6% | — |
| 2006 | 4.6 | 43.6% | — |
| 2007 | 6.8 | 64.9% | — |
| 2008 | 7 | 66.5% | — |
| 2009 | 6.7 | 63.5% | — |
| 2010 | 4 | 37.8% | — |
| 2011 | 5.8 | 55.3% | — |
| 2012 | 6.2 | 59.0% | — |
| 2013 | 7 | 66.5% | — |
| 2014 | 2.8 | 27.1% | — |
| 2015 | 2.2 | 21.1% | — |
| 2016 | 5.1 | 48.3% | — |
| 2017 | 5.9 | 56.1% | — |
| 2018 | 5.6 | 52.9% | — |
| 2019 | 5.6 | 53.0% | — |
| 2020 | 6.4 | 60.5% | — |
| 2021 | 3 | 28.9% | — |
| 2022 | 1.4 | 13.4% | — |
| 2023 | 4 | 38.3% | — |
| 2024 | 3.9 | 37.3% | — |
| 2025 | 4.7 | 44.2% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| GEN1 | Conventional Hydroelectric | HY | 1.2 | 1.2 | Jan 1987 | Operating | — | coming soon |
Owner / operator
Operator: Calleguas Mun Water District. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Calleguas Mun Water District | 100.0% | 1 MW |
Nearby plants
Within 80 km.
| Chatsworth Industrial Center 1-SLLAX601 | 1 MW | 3 km |
| 20701 Plummer PV, LLC | 2 MW | 4.1 km |
| Prairie | 2 MW | 4.5 km |
| 20525 Nordhoff PV (North) | — | 4.9 km |
| VS RXI Mason-Chatsworth, LLC | 2 MW | 5.1 km |
| Nordhoff Place | 1 MW | 6.1 km |