Los Vaqueros Reservoir Expansion OVerview
Expansion of Los Vaqueros Reservoir improves Bay Area water supply reliability and water quality while protecting Delta fisheries and providing additional Delta ecosystem benefits.
The proposed project will include a regional intertie (the Transfer-Bethany Pipeline), improved pump stations and pipelines and could increase the reservoir's capacity up to 275,000 acre-feet.
The proposed project builds upon the successful first phase of expansion from 100,000 to 160,000 acre-feet funded by the Contra Costa Water District and completed in 2012.
Los Vaqueros is one of the projects being evaluated in the context of a broader Bay Area effort to work collaboratively as a region to improve water supply reliability.
Los Vaqueros Expansion Fact Sheet
Statement on the California Water Commission's
Technical Reviews and Staff-Recommended Component Scores
for Applications for Water Storage Funding
Contra Costa Water District (District) is encouraged to see the total score for the Prop. 1 application to expand Los Vaqueros Reservoir. The score demonstrates that this project meets the criteria for receiving Prop. 1 funding. We appreciate the ongoing hard work and dedication by the California Water Commission (CWC) and the agency staff. The District looks forward to continuing to work with the CWC on next steps in the evaluation process. We remain confident that the benefits of an expanded reservoir will be seen regionally and statewide, and we appreciate the ongoing support from potential partners through the application process.
Jerry Brown, General Manager
Contra Costa Water District
California Water Commission's Technical Review, Preliminary Scores, and Determinations and Findings for Water Storage Funding
- Water Storage Investment Program Project Technical Review
- WSIP Determinations Summary
- WSIP Commission Determinations and Additional Eligibility Requirement
- California Department of Fish and Wildlife Findings
- California Department of Water Resources Findings
- Summary of WSIP Application Preliminary Scores
There is one dam-raising project that has drawn enthusiastic backing from environmental groups: expansion of the Los Vaqueros reservoir near Livermore. It promises to be a source of water for San Joaquin Valley wildlife refuges that often go dry in drought years.
...Raising Los Vaqueros’ earthen dam by 55 feet has has drawn widespread support from both environmentalists and water agencies, including the Santa Clara Valley Water District and East Bay Municipal Utility District. It would provide storage for 275,000 acre feet of water, enough to meet the needs of an additional 575,000 people.
Expanding Los Vaqueros Reservoir is an innovative project that embodies what the voters approved when they passed Proposition 1, including significant, well-defined public benefits for the environment.
Working to expand water supplies for California’s next drought, a coalition of 12 Bay Area water agencies took a significant step Monday toward an $800 million expansion of one of the largest reservoirs in the Bay Area — Los Vaqueros Reservoir in the rolling hills near the Alameda-Contra Costa county line.
Additional flexibility for the water-supply system, water to benefit urban customers in the Bay Area, water for wetlands as well as for farmers and other water users south of the delta: Those are the reasons a dozen partners have joined in support of a proposed expansion of Los Vaqueros Reservoir.
Millions of Bay Area residents could get extra drought insurance against water shortages and quality problems from a proposed $800 million expansion of the Los Vaqueros Reservoir that may have up to 10 water suppliers as partners.
...This plan is amazingly simple. The height of the earthen dam would be raised by 51 feet to 269 feet. That would enable Los Vaqueros Reservoir to expand its capacity from 160,000 acre-feet of water to hold 275,000 acre-feet enough to serve 1.4 million residents on an annual basis.