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

2. Reservoir Island Flow Control Structures
Four 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:
Fish Screen
Inlet/Outlet structures
Pumping Plant
Bypass Channel
Goal is to maximize gravity flow and minimize pumping to reduce operation and maintenance costs

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

6. Pumping/Gravity Conduit
Integrated Facility
Components
Pumping Plant
Gate Structure
Pumping/Gravity Conduit
Bypass Channel
Engineered
Embankment
Reservoir 2 3
Forebay
Mid-bay
Afterbay 1
Trash Rack
Transition Pool
Fish Screen
Sheet Pile
Wall
River
River

7. Integrated Facility Diversion Flow Paths
Reservoir 2 3 1
River
River
Diversion
From River

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

9. Diversion & Release Flow Paths
Integrated Facility
Diversion & Release Flow Paths
Reservoir 2 3 1
River
River
Release
To River
Diversion
From River

10. Key Features of Integrated Facility
Fish 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 operations
Diversions and releases are optimized with gravity flow and pumping combinations
Required flow under gravity is possible with small head differences
Low pool level and pumping units allow for complete drainage of reservoir when necessary

11. Ongoing Work
Finalizing 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 channel
Preparing structural design for all Integrated Facility components
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 operations
CVFFRT gave a positive response to the proposed concept