The Delta

Supervisor Piepho is committed to working with local, state and federal leaders to find a sustainable solution that will not compromise the long-term viability of the Delta. She has been appointed by her fellow Board Members as well as the Delta Counties delegation, to serve as a lead advocate on Delta Water issues particularly as it relates to additional water exports to points south.  As a water-front resident, who uses the Delta for both recreation and drinking water, she believes we must develop solutions that protect both the ecosystem and water quality.  

"The controversial tunnels would be an underground version of Gov. Edmund Brown Jr.’s ill-fated peripheral canal, rejected by Californians in 1982. But unlike his effort then, the twin tunnel project will not face a vote by Californians. If built, the project, estimated by one economist to cost $60 billion, including interest on borrowed money, would result in permanent impacts to approximately 775 acres and temporary impact to approximately 1,930 acres of waters of the United States, including wetlands, in or adjacent to the Sacramento-San Joaquin Delta.

Impacts to navigation include the construction of three intake structures on the Sacramento River, construction of tunnels beneath navigable waterways, operations of the three new intakes at up to 3,000 cubic feet per second, re-operations of the intake gate to Clifton Court Forebay, and construction of a permanent barrier at the head of Old River.

Eleven disposal sites are proposed for tunnel muck excavated from both the north tunnels and the dual main tunnels. The main tunnels would each be 40 feet in diameter, with a capacity well above the 3,000 cubic feet per second mentioned in the application.

The proposed project is designed to deliver up to 9,000 cubic feet per second of water from the Sacramento River to the south Delta export pumping plants. The tunnels would be gravity-fed and deliver the water to the State Water Project and the federal Central Valley Project to then be sold to San Joaquin Valley farmers and urban users in the Los Angeles area."