Ajay Goyal Department of Water Resources August 9, 2007 Franks Tract Project Ajay Goyal Department of Water Resources August 9, 2007

Project Objective To improve the water quality of export water and possibly benefit fisheries

Franks Tract Project - Alternatives Three Mile Slough West False River

West False River Alternative Sacramento River Three Mile Sl. San Joaquin River Operable Gates Old R i v e r False River FRANKS TRACT San Joaquin River

Three Miles Slough Alternative Operable Gates Sacramento River San Joaquin River Three Mile Sl. Old R i v e r False River FRANKS TRACT San Joaquin River

Three Miles Slough Alternative Sacramento River Three Mile Sl. San Joaquin River FLOOD TIDE Old R i v e r False River FRANKS TRACT San Joaquin River

Three Miles Slough Alternative Sacramento River Three Mile Sl. San Joaquin River EBB TIDE Old R i v e r False River FRANKS TRACT San Joaquin River

Three Miles Slough Alternative Sacramento River Three Mile Sl. San Joaquin River NET FLOW Old R i v e r False River FRANKS TRACT San Joaquin River

Three Miles Slough Alternative Sacramento River Three Mile Sl. San Joaquin River NET FLOW EXPORTS FLOWS Old R i v e r False River FRANKS TRACT San Joaquin River

Three Miles Slough Alternative Sacramento River Three Mile Sl. San Joaquin River Close on EBB Tide Old R i v e r False River FRANKS TRACT San Joaquin River

Obermeyer Gates

Obermeyer Gate - Cross Section GATE PANEL IN RAISED POSITION GATE PANEL IN LOWERED POSITION

Three Mile Slough - CLOSED During Portion of Ebb Tide Base Condition

Three Mile Slough- CLOSED Base Condition Three Mile Slough- CLOSED

Net Daily Average Flow Diversion = 3000 cfs for July Particle Tracking Summary June 1996 3000 Particles Released - Near Rio Vista CVP - Base SWP - Base CVP - TMS Gate Closed SWP - TMS Gate Closed Net Daily Average Flow Diversion = 3000 cfs for July

Possible Operations of Three Mile Slough Gate Closed during portion of ebb tide Benefit Fisheries Improve WQ Can be used in lieu of DCC gates Complete closure for some time Degrade WQ Closed on Portion of Flood Tide ???

Important Points Strategically located between Sacramento River and San Joaquin River Capability to move net flows INWARD or OUTWARDS Three Mile Slough much smaller than Sacramento River Sacramento River - 2500 ft wide Three Mile Slough - 550 ft wide

Discussion Ajay Goyal 916-651-9823 agoyal@water.ca.gov