In-Delta Storage Program Engineering Investigations Control Structures Stakeholders Committee Meeting January 22, 2003 Jeremy Arrich

Four Integrated FacilitiesFour Integrated Facilities –Two on Webb Tract; Two on Bacon Island –Purpose is to combine all operational components into a single facility for more efficient operations Operational Components include:Operational Components include: –Fish Screen –Inlet/Outlet structures –Pumping Plant –Bypass Channel –Goal is to maximize gravity flow and minimize pumping to reduce operation and maintenance costs Reservoir Island Flow Control Structures

Four Integrated Facilities Two on Webb Tract and Two on Bacon Island

Integrated Facility Components Components Fish Screen Trash Rack Bypass Channel Pumping Plant River Reservoir Gate Structure Sheet Pile Wall River Pumping/Gravity Conduit Engineered Embankment Forebay Mid-bay Afterbay Transition Pool

Integrated Facility Diversion Flow Paths Integrated Facility Diversion Flow Paths Diversion From River Reservoir River

Integrated Facility Release Flow Paths Integrated Facility Release Flow Paths Release To River Reservoir River 1 3 2

Integrated Facility Diversion & Release Flow Paths Integrated Facility Diversion & Release Flow Paths Release To River Reservoir River Diversion From River

Key Features of Integrated Facility Fish Screen is isolated from other controls with a transition poolFish Screen is isolated from other controls with a transition pool Storage diversions and releases can occur when the river and reservoir are at different levels, allowing for year-round operationsStorage diversions and releases can occur when the river and reservoir are at different levels, allowing for year-round operations Diversions and releases are optimized with gravity flow and pumping combinationsDiversions and releases are optimized with gravity flow and pumping combinations Required flow under gravity is possible with small head differencesRequired flow under gravity is possible with small head differences Low pool level and pumping units allow for complete drainage of reservoir when necessaryLow pool level and pumping units allow for complete drainage of reservoir when necessary

Ongoing Work Finalizing design criteria and procedures for hydraulic analysis and structural designFinalizing design criteria and procedures for hydraulic analysis and structural design Performing hydraulic analysis to optimize sizes for the fish screen, inlet outlet structures, pumping plant, and bypass channelPerforming hydraulic analysis to optimize sizes for the fish screen, inlet outlet structures, pumping plant, and bypass channel Preparing structural design for all Integrated Facility componentsPreparing structural design for all Integrated Facility components Coordinating with:Coordinating with: –DWR’s Division of Engineering –USBR –Central Valley Fish Facilities Review Team (CVFFRT) –Consulting Teams CVFFRT has been briefed on the proposed fish screen design, facility layout, and overall operationsCVFFRT has been briefed on the proposed fish screen design, facility layout, and overall operations –CVFFRT gave a positive response to the proposed concept