The Contra Costa Water District expanded its Los Vaqueros Reservoir starting in 2011, with finishing in fall of 2012. The reservoir's capacity grew from 100,000 acre-feet to 160,000 acre-feet.
The dam has increased in height by 34 feet, and is now 218-feet high (from toe to crest). The additional water storage will help ensure high-quality water deliveries to customers, reliability during drought and protections for Delta fisheries and the environment.
In addition to enlarging the dam, the District purchased more than 5,000 acres of land in Contra Costa, Alameda and San Joaquin counties to provide habitat for several endangered species. In January 2013, the District began to fill the reservoir past its previous 100,000 acre-foot capacity. The total expansion project cost $120 million.
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