Parker Dam — San Bernardino, CA — Operational Power Plant
Total Capacity
120 MW
Technology
Hydro
4 generators
First Unit Online
December 1, 1942
Parker Dam is a hydro power plant in San Bernardino County, CA with 4 generating units totaling 120 MW of nameplate capacity. It is operated by U S Bureau of Reclamation. Its first unit came online in 1942.
About this plant
Parker Dam is a concrete arch-gravity dam that crosses the Colorado River 155 miles (249 km) downstream of Hoover Dam. Built between 1934 and 1938 by the Bureau of Reclamation, it is 320 feet (98 m) high, 235 feet (72 m) of which are below the riverbed (the deep excavation was necessary in order to reach the bedrock on which the foundation of the dam was built), making it the deepest dam in the world. The portion of the dam above the foundation stands 85 feet (25.9 m) tall, making it the only dam in the world that stands more underground than above ground. The dam's primary functions are to create a reservoir, and to generate hydroelectric power. The reservoir behind the dam is called Lake Havasu and can store 647,000 acre⋅ft (798,000,000 m3; 2.11×1011 US gal; 1.76×1011 imp gal). The dam straddles the Arizona-California state border at the narrows the river passes through between the Whipple Mountains in San Bernardino County, California and the Buckskin Mountains in La Paz County, Arizona.
Source: Wikipedia
Capacity rank
- #159 in the U.S. by capacity
- #33 in CA by capacity
Looking for hydro projects still in development?
EIA 860M shows operational plants and those starting operation within one year. Our Interconnection Queue dataset tracks 30,000+ projects from application through commercial operation.
Monthly generation history
Source: EIA Form 923
Generators (4)
4 generators
4 operational generators totaling 120 MW · online 1942–1943
Plant Information
| Plant ID | 447 |
| Plant Name | Parker Dam |
| Operator | U S Bureau of Reclamation |
| Sector | Electric Utility |
| Balancing Authority | WALC |
| Power Market | |
| County | San Bernardino |
| State | California (all interconnection requests in California) |
| Status | Operational |
| Generation Type(s) | Hydro |
| Total Nameplate Capacity (MW) | 120 |
| Total Summer Capacity (MW) | 120 |
| Total Winter Capacity (MW) | 120 |
| Generating Units | 4 |
| Operational Units | 4 |
| Planned Units | 0 |
U.S. county map showing San Bernardino, CA
Stay up to date via our email newsletter:
Interconnection queue requests/projects in list format
All transmission grid interconnection queue requests/projects All distribution grid (DG) interconnection queue requests/projects Data center projects by state EIA860 planned and operational power plant projectsInsights
Charts State of interconnection queues — January 2024In 2024, interconnection queues shrank for the first time in yearsAll insightsGridTracker
GridTracker — the full interconnection data platformAbout GridTrackerQueue requests/projects by country
Queue requests/projects by power market
Queue requests/projects by status
Queue requests/projects by cluster
Queue requests/projects by U.S. state
Queue requests/projects by Canadian province
Data Centers
All data center projectsBy U.S. State
Interconnection queue requests/projects by transmission owner
Interconnection queue requests/projects by year
Queue requests/projects in 2026Queue requests/projects in 2025Queue requests/projects in 2024Queue requests/projects in 2023Queue requests/projects in 2022Queue requests/projects in 2021Queue requests/projects in 2020Queue requests/projects in 2019Queue requests/projects in 2018Queue requests/projects in 2017Queue requests/projects in 2016Queue requests/projects in 2015Queue requests/projects in 2014Queue requests/projects in 2013Queue requests/projects in 2012Queue requests/projects in 2011Queue requests/projects in 2010Queue requests/projects in 2009Queue requests/projects in 2008Queue requests/projects in 2007Queue requests/projects in 2006Queue requests/projects in 2005Queue requests/projects in 2004Queue requests/projects in 2003Queue requests/projects in 2002Queue requests/projects in 2001Queue requests/projects in 2000Queue requests/projects in 1999Queue requests/projects in 1998Queue requests/projects in 1997Queue requests/projects in 1996Queue requests/projects in 1995Interconnection.fyi is a free public resource by GridTracker, the research firm behind the interconnection data in LBNL's Queued Up.
© 2026 Interconnection.fyi. All rights reserved.