BDCP Bay Delta Conservation Plan BDCP Proposed Water Conveyance System (CM1)

CM1 water facilities and conveyance operations have been re! ned, largely in CM1 Features: response to the potential impact to Delta communities, since ! rst proposed. • Three intakes, together capable Changes include: • The number of new Sacramento River intakes of diverting up to 9,000 cfs. Intermediate Forebay: has been reduced from ! ve to three and A new 40 acre forebay capacity reduced from 15,000 cfs to 9,000 cfs would be constructed to • State-of-the-art !sh screens • Underground tunnels, instead of a surface collect water from the river canal, proposed for water transport intakes before it enters the tunnel system. that would protect passing sh.! • Alignment shift away from Delta communities • Shrinking of the intermediate forebay from Dual-Bore Tunnels: Two 40-foot • A forebay for collection of the 750 acres to 40 acres inside-diameter tunnels would • Height of the pumping plants at the be constructed, side by side, more water diverted from the river. intake facilities reduced from 60 feet to than 150 feet below ground to approximately 30 feet.” deliver water supplies to the redesigned Clifton Court Forebay. • Two tunnels to carry water 30 miles to the existing pumping Clifton Court Forebay: Redesigned to improve overall operations, the existing forebay would be Clifton Court Forebay: plants in the south Delta. From dredged, divided, refurbished, and expanded to the Redesigned to improve overall south. Proposed north Delta conveyance facilities operations, the existing forebay would supply water to the northern portion of the would be dredged, divided, there, water would be moved forebay, while the southern portion will continue to refurbished, and expanded to provide " ows to the SWP and operate as it does today. the south. Proposed north Delta into existing aqueducts that conveyance facilities would supply water to the northern supply much of the state. portion of the forebay, while the Designed for 9,000 cfs capacity: southern portion will continue As designed, the tunnels could not carry more than 9,000 cfs unless to provide " ows to the SWP and reinforced with steel liners and pressurized by additional pumping operate as it does today. Proposed Tunnel System plants.lSh Such a retro! t wouldldbillfibll be marginally feasible, extremely Surge expensive, and would require an entirely new permitting process. Tower South Bay Sedimentation Pumping Pumping Basin Plant Plant To On-Bank Delta- Intermediate Mendota Intake Canal Canal Forebay Clifton Court Forebay or Sacramento River California South Delta Aqueduct (dredged, expanded, and divided) Pumping Single-Bore Tunnel Vent/Access Vent/Access Plants Shaft Shaft Dual-BoreTunnels (Approx.(Approx. 30 30 Miles) Miles) California Aqueduct (SWP) No  nal decisions on the proposed conveyance facility have been made. CompleƟ on of environmental review and Delta-Mendota Canal (CVP) public input is now underway. The elements described here are for the purpose of assisƟ ng the public review as a guide South Bay Aqueduct to the BDCP and proposed project idenƟ  ed in the Environmental Impact Report/Environmental Impact Statement.