North Bay Aqueduct

The North Bay Aqueduct (NBA) is part of the California State Water Project that was built in two phases, Phase I (1967-1968) and Phase II (1985-1988). The aqueduct is 27.4 miles (44.1 km) long all in pipelines and serves Napa and Solano counties, California. The aqueduct provides water to about 500,000 residents in Solano and Napa. The State Water Project diverts water originating from the Sacramento and San Joaquin Rivers (and their tributaries), and it stores water in Lake Oroville. The North Bay Aqueduct was envisioned as part of the State Water Project during the 1950s and 1960s when the project was being planned. Initial North Bay Aqueduct water service went to Benicia and Vallejo. In 1990, the North Bay Regional Water Treatment Plant, serving Fairfield and Vacaville, came online and was able to treat water from the North Bay Aqueduct for these two cities. The aqueduct cost approximately $83 million to construct. The North Bay Aqueduct is an underground pipeline that runs from Barker Slough in the Sacramento-San Joaquin River Delta to Cordelia Forebay, just outside Vallejo. From the Cordelia Forebay water is pumped to Napa County, Vallejo and Benicia. Travis Air Force Base is also served by the NBA. It is an enclosed pipeline between Barker Slough and Cordelia Forebay. The size of the underground pipeline varies from 72 inches at Barker Slough to 54 inches at Cordelia

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