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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. Hydrologic Setting. Confluence of Sacramento & San Joaquin Rivers Eastside tributaries

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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


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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


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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)


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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


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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


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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



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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



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Pardee Reservoir Diversion

  • 650 million gallons per day

  • 12 mile tunnel/pipeline

Pardee Reservoir

  • Wet year supply

  • 40 to 90 kaf


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Duck Creek Dam & Reservoir

  • 150,000 acre foot capacity

  • 10 megawatt power capacity

Duck Creek Site


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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


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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


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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


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Groundwater Overdraft

  • County’s Eastern Basin

  • Groundwater level 60 feet below MSL

  • Strong west to east gradient in Stockton area

  • Saline Intrusion


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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



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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


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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


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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


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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


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Groundwater Recharge Projects

  • In-lieu groundwater recharge

  • Well facilities

  • Direct recharge

  • Local and regional support


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Conjunctive Use Implementation

1.5 million acre feet - aquifer storage



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