Mill Creek 3
San Bernardino County, California · EIA plant ID 7147 · Operator: Southern California Edison Co
Nameplate3MWSummer 3 MW
Generators3in service
Net generation1GWh12 mo to Dec 2025
Capacity factor3%hydro units, summer MW
Heat rate—thermal plants only
First online1903
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 | 5.8 | 27.8% | — |
| 2002 | 4.3 | 20.2% | — |
| 2003 | 10.9 | 51.7% | — |
| 2004 | 9.1 | 43.3% | — |
| 2005 | 12.7 | 60.4% | — |
| 2006 | 13.5 | 64.3% | — |
| 2007 | 6.9 | 32.7% | — |
| 2008 | 10.7 | 50.9% | — |
| 2009 | 7.5 | 35.5% | — |
| 2010 | 11 | 52.1% | — |
| 2011 | 12.6 | 60.0% | — |
| 2012 | 7.4 | 28.1% | — |
| 2013 | 5.8 | 22.1% | — |
| 2014 | 4.9 | 18.7% | — |
| 2015 | 5 | 18.9% | — |
| 2016 | 5.2 | 19.9% | — |
| 2017 | 14.5 | 55.2% | — |
| 2018 | 7.6 | 28.8% | — |
| 2019 | 10.6 | 40.4% | — |
| 2020 | 4.4 | 16.8% | — |
| 2021 | 5.8 | 22.1% | — |
| 2022 | 6.2 | 23.4% | — |
| 2023 | 10.5 | 40.1% | — |
| 2024 | 10.6 | 40.4% | — |
| 2025 | 0.8 | 2.9% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 3 | Conventional Hydroelectric | HY | 1 | 1 | Mar 1903 | Operating (Standby / backup) | — | coming soon |
| 4 | Conventional Hydroelectric | HY | 1 | 1 | Oct 1904 | Operating (Standby / backup) | — | coming soon |
| 5 | Conventional Hydroelectric | HY | 1 | 1 | Mar 1904 | Operating (Standby / backup) | — | coming soon |
Owner / operator
Operator: Southern California Edison Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Southern California Edison Co | 100.0% | 3 MW |
Nearby plants
Within 80 km.
| Santa Ana 3 | 3 MW | 5.9 km |
| Santa Ana 1 | 3 MW | 6.6 km |
| Crafton Hills College Solar Farm | retired | 7.4 km |
| Energy Center | 1 MW | 11.8 km |
| Chambers 4 - Redland LGB4 | 2 MW | 14.9 km |
| Redlands DC 9 - sline609 | — | 15.1 km |