Parker Dam
San Bernardino County, California · EIA plant ID 447 · Operator: U S Bureau of Reclamation
Nameplate120MWSummer 120 MW
Generators4in service
Net generation360GWh12 mo to Aug 2026
Capacity factor34%hydro units, summer MW
Heat rate—thermal plants only
First online1942
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
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 | 492.6 | 46.9% | — |
| 2002 | 465.8 | 44.3% | — |
| 2003 | 461.3 | 43.9% | — |
| 2004 | 439.5 | 41.7% | — |
| 2005 | 410.9 | 39.1% | — |
| 2006 | 448 | 42.6% | — |
| 2007 | 449.6 | 42.8% | — |
| 2008 | 436.9 | 41.4% | — |
| 2009 | 437.1 | 41.6% | — |
| 2010 | 439.3 | 41.8% | — |
| 2011 | 462.9 | 44.0% | — |
| 2012 | 462.4 | 43.9% | — |
| 2013 | 433.7 | 41.3% | — |
| 2014 | 448.6 | 42.7% | — |
| 2015 | 439.9 | 41.9% | — |
| 2016 | 440.9 | 41.8% | — |
| 2017 | 435.5 | 41.4% | — |
| 2018 | 436.4 | 41.5% | — |
| 2019 | 424.6 | 40.4% | — |
| 2020 | 430 | 40.8% | — |
| 2021 | 437 | 41.6% | — |
| 2022 | 425.5 | 40.5% | — |
| 2023 | 392.2 | 37.3% | — |
| 2024 | 396.1 | 37.6% | — |
| 2025 | 361.1 | 34.4% | — |
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 | 30 | 30 | Dec 1942 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 30 | 30 | Jan 1943 | Operating | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 30 | 30 | Dec 1942 | Operating | — | coming soon |
| 4 | Conventional Hydroelectric | HY | 30 | 30 | May 1943 | Operating | — | coming soon |
Owner / operator
Operator: U S Bureau of Reclamation. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| U S Bureau of Reclamation | 100.0% | 120 MW |
Nearby plants
Within 80 km.
| Headgate Rock | 20 MW | 18.9 km |
| Vidal Energy Center | — | 38.4 km |
| La Paz Solar Tower | — | 43.6 km |
| Atlas | — | 50.6 km |
| OE_AZ1 | 33 MW | 72.9 km |
| South Point Energy Center | 708 MW | 73.1 km |