1. Water Resource Management Planning Update
San Joaquin County
Water Resource Management Planning Update
C. Mel Lytle, Ph.D.
Water Resource Coordinator
Department of Public Works
August 26, 2004
Water Resource Division

2. Hydrologic Setting Confluence of Sacramento & San Joaquin Rivers
Eastside tributaries
Delta - water switching yard for State
Delta supplies water to about 22 million in State
The Sacramento-San Joaquin Delta covers more than 738,000 acres in five counties, and comprises many small islands within a network of canals and natural sloughs. The Sacramento and San Joaquin rivers come together in the Delta before they flow to the San Francisco Bay and out to the ocean. The Delta is the largest estuary on the west coast, and is home to over 750 plant and animal species, many of which are endangered. The Delta provides drinking water for two-thirds of all Californians, and irrigation water for over 7 million acres of highly productive farmland.Rivers in San Joaquin County
Water Resource Division

3. Water Resource Issues
Rapid urban growth, agricultural and environmental demands
Complex water management
Heavy reliance on groundwater
Basin overdraft & saltwater intrusion
New arsenic standards
Napa Proposal - increased Delta exports (1 million acre feet)
Population increased more than 20 % in past decade
Some communities experienced 50% growth
Population projected to double by 2035
Water Resource Division

4. Water Management Planning
Two-year consensus-based effort including 29 local, State and Federal stakeholder agencies
Water supply demand (200,000 acre feet overdraft)
Developed management goals
Outlined new water supply projects
Adopted by Board in 2002
Water Resource Division

5. Water Supply Projects Potential Projects Feasibility Phase
Design/Pilot Phase
Implementation Phase
Tier I
New Melones Rights…………………..
New Hogan Reoperation
Farmington
SSJID/OID Transfer
South County Water Supply
Stockton Delta Diversion
Urban Conservation
Tier II
NSJWCD GW Recharge
Agricultural Conservation
Freeport
Wastewater Reclamation
Mokelumne River
Tier III
South Gulch
American River
……..BOR IRMP
Stockton Delta Diversion
SJC-Freeport Diversion
MORE WATER Project
SEWD Farmington Program
NSJ - GW Recharge
SSJID/OID Transfers
South County Water Supply
Urban Conservation
Planning identified more than 14 different management options. Options were grouped into 3 tiers based on feasibility, and
Water Resource Division

6. County Project Summary
MORE WATER Project
New Mokelumne River supply
Freeport Interconnect Project
New American River supply
Groundwater Basin Planning
Eastern Basin Management Plan
USGS Joint Salinity Project
Water Resource Division

7. Location Map
Water Resource Division

8. MORE WATER Project “wet year storage for dry year use”
Mokelumne River Water & Power Authority -1990
New supply & hydropower from Mokelumne River
Cost share – County, Stockton & Lodi
Phase I Feasibility Assessment – Completed 2003
Mokelumne River Watershed
Water Resource Division

9. MORE WATER Project Map
Water Resource Division

10. Pardee Reservoir Diversion
650 million gallons per day
12 mile tunnel/pipeline
Pardee Reservoir
Wet year supply
40 to 90 kaf
Water Resource Division

11. Duck Creek Dam & Reservoir
150,000 acre foot capacity
10 megawatt power capacity
Duck Creek Site
Water Resource Division

12. Project Development Schedule
Phase 1 Reconnaissance Study - Released June 2004
Phase 2 Integrated Conjunctive Use Programmatic EIR
Coordinate with Local, State & Federal Agencies
Refine Water/Groundwater Management Plans
Prepare Program EIR on Management Plan Conjunctive Use Alternatives
Phase 3 Engineering Feasibility Studies
Phase 4 Project-Specific EIR/EIS
Phase 5 Engineering & Final Design
Phase 6 Permitting & Construction
Water Resource Division

13. Freeport Diversion Project
EBMUD Freeport Regional Water Project – dry year supply by 2008
Pipeline available in normal & wet years.
44,000 to 62,000 acre feet
185 mgd
85 mgd
100 mgd
Drought
Water Resource Division

14. Freeport Diversion Next Steps
Negotiate with EBMUD for use of pipeline
Complete project feasibility & environmental analysis
Secure water right & construct project
Freeport
MORE WATER
Duck Creek Reservoir
Water Resource Division

15. Groundwater Overdraft
County’s Eastern Basin
Groundwater level 60 feet below MSL
Strong west to east gradient in Stockton area
Saline Intrusion
Water Resource Division

16. Groundwater Management Planning
Eastern San Joaquin Basin Plan - Groundwater Banking Authority
1 year consensus-based collaborative effort including 45 agencies
For State funding eligibility
“Management Objectives”
Monitoring programs
Water supply and recharge projects
Water Resource Division

17. Basin Management Area
Water Resource Division

18. Plan Purpose & Objectives
Enhance Long-Term Sustainability of the Eastern San Joaquin Basin
Prevent Further Saline Intrusion
Develop Program to Monitor, Evaluate and Predict Basin Conditions
Maintain Local Control
Financing & Partners
Project Coordination
Water Resource Division

19. USGS Joint Salinity Project
Groundwater Banking Authority, US Geological Survey & State Dept. of Water Resources
$2.5 million over 5 years - $1.25 million from State and Feds
Source saline groundwater
Groundwater recharge and flow
Monitoring well network/database
Reduce saline intrusion
Water Resource Division

20. Management Plan Next Steps
Plan Adoption – 2004
Continued local and regional cooperation
Increased data collection and analysis
State and Federal funding
Implementation of management objectives
Recharge project coordination
Water Resource Division

21. Integrated Conjunctive Use Program
East Basin
Conjunctive Use
Program
MORE WATER
SJC-FREEPORT
OTHER SUPPLY PROJECTS
SEWD
FARMINGTON
PROGRAM
GILL CREEK
BASINS
STOCKTON ASR WELLS
NSJWCD
RECHARGE
OTHER PROJECTS
CSJWCD
IN-LIEU
LODI ASR WELLS
DELTA DIVERSION
CALAVERAS River
STANISLAUS River
EWA PROJECTS
Water Resource Division

22. Groundwater Recharge Projects
In-lieu groundwater recharge
Well facilities
Direct recharge
Local and regional support
Water Resource Division

23. Conjunctive Use Implementation
1.5 million acre feet - aquifer storage
Water Resource Division

24. Questions?
Water Resource Division

25. Water Resource Division