San Joaquin County Water Resource Management Planning Update C. Mel Lytle, Ph.D. Water Resource Coordinator San Joaqu

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

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

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)

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

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

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

7. Location Map

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

9. MORE WATER Project Map

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

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

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 EngineeringFeasibility Studies • Phase 4 Project-Specific EIR/EIS • Phase 5 Engineering & Final Design • Phase 6 Permitting & Construction

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 1976-77 Drought

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

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

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

17. Basin Management Area

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

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

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

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

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

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

24. Questions?