Hemet City Council
June 9, 2026

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Table of Contents

4.7 Land Use................................................................................................................................ 68

4.8 Current Water Supplies ....................................................................................................... 71

4.8.1 Groundwater............................................................................................................ 71

4.8.2 Imported Water ....................................................................................................... 80

4.8.3 Recycled Water........................................................................................................ 81

4.8.4 Surface Water........................................................................................................... 82

4.8.5 Purchases from EMWD .......................................................................................... 83

4.9 Estimates of Safe Yield and Overdraft .............................................................................. 83

4.9.1 Safe Yield .................................................................................................................. 83

4.9.2 Overdraft .................................................................................................................. 88

4.10 Water Quality Conditions ................................................................................................... 88 SECTION 5 PROJECTED WATER DEMANDS AND FUTURE PLAN PHASES ..................... 95

5.1 Projected Land Use Conditions .......................................................................................... 95

5.2 Projected Water Demands................................................................................................... 97

5.2.1 EMWD....................................................................................................................... 97

5.2.2 LHMWD ................................................................................................................... 98

5.2.3 City of Hemet Water Service Area........................................................................ 99

5.2.4 City of San Jacinto ................................................................................................... 99

5.2.5 Soboba Tribe........................................................................................................... 100

5.2.6 Private Water Producers....................................................................................... 101

5.2.7 Management Area................................................................................................. 101

5.3 Future Plan Phases ............................................................................................................. 102

5.3.1 San Jacinto River Integrated Recharge and Recovery Project, Phase II......... 102

5.3.2 Potential Conjunctive Use Projects ..................................................................... 104

5.3.3 Direct Recharge Projects....................................................................................... 105

5.3.4 In-Lieu Projects ...................................................................................................... 110 SECTION 6 GROUNDWATER RIGHTS ........................................................................................ 113

6.1 Public Agencies Base Production Rights......................................................................... 113

6.1.1 General.................................................................................................................... 113

6.1.2 EMWD Base Production Rights .......................................................................... 114

6.1.3 LHMWD Base Production Rights ....................................................................... 115

6.1.4 City of Hemet Base Production Rights............................................................... 115

6.1.5 City of San Jacinto Base Production Rights ....................................................... 115

6.2 Private Water Producer’s Production Rights ................................................................. 115 iii Hemet/San Jacinto Groundwater Management Area
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6.2.1 General.................................................................................................................... 115

6.2.2 Class A Production Rights ................................................................................... 116

6.2.3 Class B Production Rights .................................................................................... 116

6.3 Soboba Tribe Water Rights................................................................................................ 117 SECTION 7 SURFACE WATER RIGHTS........................................................................................ 119

7.1 LHMWD’s Diversion Rights............................................................................................. 119

7.1.1 Lake Hemet ............................................................................................................ 119

7.1.2 South Fork of the San Jacinto River .................................................................... 119

7.1.3 North Fork of the San Jacinto River.................................................................... 121

7.1.4 Strawberry Creek................................................................................................... 121

7.2 EMWD’s Diversion Rights ................................................................................................ 121 SECTION 8 SOBOBA TRIBE SETTLEMENT REQUIREMENTS .............................................. 123

8.1 Original Soboba Claim....................................................................................................... 123

8.1.1 Early Negotiations................................................................................................. 123

8.1.2 United States Settlement Proposal...................................................................... 123

8.1.3 Tribal Claim Against MWD................................................................................. 123

8.1.4 MWD’s Cross Complaint ..................................................................................... 123

8.1.5 Final Negotiations ................................................................................................. 124

8.1.6 Status of Congressional Approval ...................................................................... 124

8.2 Framework of the Settlement Agreement....................................................................... 124

8.3 Tribal Water Right.............................................................................................................. 124

8.4 Payments to the Tribe ........................................................................................................ 124

8.5 Funds Received by the Local Agencies ........................................................................... 124

8.6 Imported Water .................................................................................................................. 125

8.6.1 MWD Storage Right.............................................................................................. 125

8.6.2 Use of MWD Supply ............................................................................................. 125

8.7 Water Quality Requirements ............................................................................................ 125

8.8 Property Transactions........................................................................................................ 125

8.9 Approval of Water Management Plan ............................................................................ 125 SECTION 9 INSTITUTIONAL PLAN.............................................................................................. 127

9.1 Purpose ................................................................................................................................ 127

9.2 Watermaster........................................................................................................................ 127

9.2.1 Composition........................................................................................................... 127 iv Hemet/San Jacinto Groundwater Management Area
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9.2.2 Terms of Office....................................................................................................... 127

9.2.3 Removal and Replacement................................................................................... 127

9.2.4 Voting...................................................................................................................... 127

9.3 Rules and Regulations ....................................................................................................... 128

9.4 Meetings............................................................................................................................... 128

9.5 Watermaster Organization................................................................................................ 128

9.6 General Duties .................................................................................................................... 130

9.6.1 Policy....................................................................................................................... 130

9.6.2 Water Management Plan Implementation......................................................... 130

9.6.3 Technical Oversight .............................................................................................. 131

9.7 Watermaster Interaction with EMWD............................................................................. 132

9.7.1 Contract for Services ............................................................................................. 132

9.7.2 Financial Responsibilities ..................................................................................... 132 SECTION 10 FINANCIAL PLAN ...................................................................................................... 133

10.1 Annual Budget.................................................................................................................... 133

10.2 Ownership of Facilities ...................................................................................................... 133

10.2.1 Existing Facilities ................................................................................................... 133

10.2.2 Future Projects ....................................................................................................... 134

10.2.3 Use of Member Agency Assets............................................................................ 134

10.3 Assessments ........................................................................................................................ 134

10.3.1 Administrative Assessments ............................................................................... 134

10.3.2 Replenishment Assessments................................................................................ 135

10.3.3 Collections and Accounts..................................................................................... 135

10.4 Phase I Facilities Construction and Soboba Settlement Financing.............................. 136

10.4.1 EMWD Construction Cost.................................................................................... 136

10.4.2 Payments to Soboba Tribe.................................................................................... 136

10.4.3 EMWD Obligation................................................................................................. 137

10.4.4 Right to Transfer Entitlement to Use Facilities and/or Entitlement to Share in Rights to Water Not Used by Tribe .................................................................. 137

10.5 Future Capital Facilities..................................................................................................... 137 SECTION 11 IMPLEMENTATION PLAN ...................................................................................... 139

11.1 Organization........................................................................................................................ 139

11.2 Monitoring Program Implementation............................................................................. 141

11.3 Management Planning Tools ............................................................................................ 144 v Hemet/San Jacinto Groundwater Management Area
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vi Hemet/San Jacinto Groundwater Management Area
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11.4 Financial Administration................................................................................................... 145

11.5 Stipulated Judgment Administration .............................................................................. 146

11.6 Facilities and Projects......................................................................................................... 147

11.7 Special Projects and Studies.............................................................................................. 148

11.8 Conservation Programs ..................................................................................................... 148

11.9 Well Construction, Abandonment, and Destruction..................................................... 148

11.10 Public Participation........................................................................................................... 149

11.11 Groundwater Management Plan Components and Consistency with the California Water Code .................................................................................................................... 150

11.12 Schedule............................................................................................................................. 150 SECTION 12 REFERENCES................................................................................................................ 153 APPENDIX A. SETTLEMENT AGREEMENT
APPENDIX B. STIPULATED JUDGMENT
APPENDIX C. LIST OF GOVERNING BODIES
APPENDIX D. PRINCIPLES FOR WATER MANAGEMENT
APPENDIX E. LIST OF COMMITTEE ATTENDEES
APPENDIX F. HISTORICAL WATER SUPPLIES
APPENDIX G. EMWD LICENSE FOR SAN JACINTO RIVER DIVERSION APPENDIX H. MEMORANDA OF UNDERSTANDING
APPENDIX I. SB1938 GROUNDWATER MANAGEMENT PLAN COMPLIANCE

CHECKLIST

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LIST OF FIGURES
Figure ES.1 Hemet/San Jacinto Groundwater Management Area and Management Zones.. 1 Figure ES.2 Components of Management Area Water Supply..................................................... 3 Figure ES.3 Historical and Projected Water Demand .................................................................... 4 Figure ES.4 Plan Institutional Setup ................................................................................................. 6 Figure 1.1 Management Area and Management Zones............................................................... 10 Figure 2.1 Public Agencies and Soboba Reservation.................................................................... 14 Figure 3.1 Schematic of Integrated Recharge and Recovery Program - Phase I....................... 32 Figure 4.1 San Jacinto Watershed.................................................................................................... 42 Figure 4.2 Average Annual Precipitation in Watershed.............................................................. 44 Figure 4.3 Annual Precipitation and Cumulative Departure from Mean Precipitation.......... 45 Figure 4.4 Fault Locations ................................................................................................................ 49 Figure 4.5 Soil Series.......................................................................................................................... 53 Figure 4.6 Hydrologic Soils Groups................................................................................................ 54 Figure 4.7 Annual Imported Water Recharged............................................................................. 56 Figure 4.8 Early 20th Century Groundwater Flow Direction....................................................... 57 Figure 4.9 Current Groundwater Flow Direction ......................................................................... 58 Figure 4.10 Spring 2004 Groundwater Elevation.......................................................................... 60 Figure 4.11 Location of Representative Well Hydrographs ........................................................ 61 Figure 4.12 Groundwater Elevation, Canyon Management Zone, EMWD #6 Cienega.......... 62 Figure 4.13 Groundwater Elevation, Upper Pressure Management Zone, EMWD #9 Hewitt and Evans..................................................................................................................................... 63 Figure 4.14 Groundwater Elevation, Hemet North Management Zone, EMWD #21 Old Dairyland ..................................................................................................................................... 65 Figure 4.15 Groundwater Elevation, Hemet South Management Zone, EMWD #22 Sneed .. 66 Figure 4.16 1998 Land Use................................................................................................................ 69 Figure 4.17 Population Growth in Incorporated Hemet and San Jacinto.................................. 70 Figure 4.18 Components of Hemet/San Jacinto Groundwater Balance.................................... 72 Figure 4.19 Annual Management Area Water Supplies .............................................................. 73 Figure 4.20 EMWD Historical Annual Demand ........................................................................... 73 Figure 4.21 LHMWD Historical Annual Demand........................................................................ 74 Figure 4.22 City of Hemet Water Service Area Historical Annual Demand............................. 74 Figure 4.23 City of San Jacinto Water Service Area Historical Annual Demand ..................... 75 Figure 4.24 Private Water Producers Historical Annual Demand ............................................. 75 Figure 4.25 Soboba Historical Annual Demand............................................................................ 76 Figure 4.26a Annual Groundwater Production, by Management Zone.................................... 76 Figure 4.26b Annual Groundwater Production, by Entity.......................................................... 77 Figure 4.27 Average Annual Entity Groundwater Production, by Management Zone, 1984- 2004 ............................................................................................................................................... 77 vii Hemet/San Jacinto Groundwater Management Area
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Figure 4.28a EMWD 2004 Groundwater Production, Percentage by Supply Source .............. 78 Figure 4.28b LHMWD 2004 Groundwater Production, Percentage by Supply Source........... 78 Figure 4.28c City of Hemet Water Service Area 2004 Groundwater Production, Percentage by Supply Source ........................................................................................................................ 78 Figure 4.28d Soboba 2004 Groundwater Production, Percentage by Supply Source .............. 78 Figure 4.28e Private Water Producers 2004 Groundwater Production, Percentage by Supply Source.............................................................................................................................. 78 Figure 4.29a EMWD Historical Groundwater Production, Percentage by Supply Source..... 79 Figure 4.29b LHMWD Historical Groundwater Production, Percentage by Supply Source . 79 Figure 4.29c City of Hemet Water Service Area Historical Groundwater Production, Percentage by Supply Source .................................................................................................... 79 Figure 4.29d Soboba Historical Groundwater Production, Percentage by Supply Source..... 80 Figure 4.29e Private Water Producers Historical Groundwater Production, Percentage by Supply Source.............................................................................................................................. 80 Figure 4.30 Annual Imported Water Supply ................................................................................. 81 Figure 4.31 Annual Recycled Water Supply.................................................................................. 82 Figure 4.32 Annual Surface Water Supply..................................................................................... 82 Figure 4.33 Annual Sales by EMWD to Other Agencies within Management Area ............... 83 Figure 4.34 Safe Yield Estimates...................................................................................................... 87 Figure 4.35 Groundwater Production and Range of Safe Yield Estimates................................ 89 Figure 4.36 2004 Nitrate as N Concentrations in Groundwater (mg/L) ................................... 92 Figure 4.37 2004 TDS Concentrations in Groundwater (mg/L) ................................................. 93 Figure 5.1 Projected Ultimate Land Use......................................................................................... 96 Figure 5.2 EMWD Historical and Projected Demand .................................................................. 98 Figure 5.3 LHMWD Historical and Projected Demand............................................................... 98 Figure 5.4 City of Hemet Water Service Area Historical and Projected Demand.................... 99 Figure 5.5 City of San Jacinto Water Service Area Historical and Projected Demand .......... 100 Figure 5.6 Soboba Tribe Historical and Projected Demand....................................................... 100 Figure 5.7 Private Water Producers Historical and Projected Demand .................................. 101 Figure 5.8 Management Area Historical and Projected Demand............................................. 102 Figure 5.9 Schematic of Integrated Recharge and Recovery Program - Phase II ................... 103 Figure 5.10 Location of 9 Preferred Projects ................................................................................ 106 Figure 6.1 Average Annual Groundwater Production, 1995 - 1999 ......................................... 113 Figure 7.1 Location of Surface Water Diversions........................................................................ 120 Figure 11.1 Relationships between Entities ................................................................................. 140 Figure 11.2 Stream Gages and Groundwater Monitoring Sites ................................................ 143 viii Hemet/San Jacinto Groundwater Management Area
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LIST OF TABLES
Table ES.1 Public Agency Base Production Rights ......................................................................... 5 Table ES.2 Implementation Schedule ............................................................................................... 7 Table ES.3 Ongoing Schedule ............................................................................................................ 7 Table 4.1 USGS Surface Water Gaging Stations ............................................................................ 47 Table 4.2 Hydrologic Soils Groups ................................................................................................. 55 Table 4.3 Groundwater Budget for the Management Area ......................................................... 67 Table 4.4 Land Use Distribution Based on the 1998 Survey........................................................ 68 Table 4.5 Published Estimates of Safe Yield for the Management Area.................................... 85 Table 4.6 Historical (1954-1973), 1997 Current (1978-1997), and 2003 Current (1984-2003) Ambient Nitrate as N and TDS Concentrations (mg/L)....................................................... 90 Table 4.7 Change in Ambient Concentration (mg/L) of Nitrate as N and TDS, Between Historical (1954-1973) and 2003 Current (1984-2003) Time Periods .................................... 91 Table 5.1 Generalized Projected Acreage in the Management Area .......................................... 97 Table 5.2 Summary of Selected Conjunctive Use Site Conditions............................................ 107 Table 6.1 Base Production Rights .................................................................................................. 114 Table 11.1 Plan Implementation Schedule ................................................................................... 151 Table 11.2 Phase I Project Construction ....................................................................................... 152 ix Hemet/San Jacinto Groundwater Management Area
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SELECTED ACRONYMS, ABBREVIATIONS, AND TERMINOLOGY
Advisor independent engineering firm or a qualified individual AF acre-foot
AFY acre-feet per year
Agreement Settlement Agreement
Association Hemet/San Jacinto Groundwater Association
CAM Consultants-Attorneys-Managers
CEQA California Environmental Quality Act
cfs cubic feet per second
DWR California Department of Water Resources
EIR Environmental Impact Report
EMWD Eastern Municipal Water District
FMWC Fruitvale Mutual Water Company
GIS Geographic Information System
Hemet North Hemet North portion of the Lakeview/Hemet North IRRP Integrated Recharge and Recovery Program
JPA Joint Powers Authority
JUDGMENT Stipulated Judgment
Legal Counsel independent attorney or legal firm
LHMWD Lake Hemet Municipal Water District
Management Area Hemet/San Jacinto Groundwater Management Area MGD million gallons per day
MOU Memorandum of Understanding
MWD Metropolitan Water District of Southern California
PC Policy Committee
Plan Hemet/San Jacinto Water Management Plan
Plan Participants EMWD, LHMWD, Private Water Producers, and Cities of Hemet and San Jacinto (collectively)
Principles Principles for Water Management
Private Water Producers Property owners who are pumping groundwater pursuant to overlying water rights
Public Agencies EMWD, LHMWD, and Cities of Hemet and San Jacinto (collectively) RCFC&WCD Riverside County Flood Control and Water Conservation District RWQCB Santa Ana Regional Water Quality Control Board
RWRD Regional Water Resources Database
S.A.A. Settlement Agreement Approval
S.J.A. Stipulated Judgment Approval
Soboba Tribe Soboba Band of Luiseno Indians
TC Technical Committee
TDS Total Dissolved Solids
x Hemet/San Jacinto Groundwater Management Area
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TM Technical Memorandum
TMDL Total Maximum Daily Load
Upper Pressure San Jacinto - Upper Pressure Management Zone USGS United States Geological Survey
UWMP Urban Water Management Plan
Watermaster Watermaster Governing Board
WRIME Water Resources & Information Management Engineering, Inc. xi Hemet/San Jacinto Groundwater Management Area
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EXECUTIVE SUMMARY

BACKGROUND AND GOALS
The stakeholders in the Hemet/San Jacinto Groundwater Management Area (Figure ES.1) have developed the Hemet/San Jacinto Water Management Plan (Plan) to provide a foundation that guides and supports responsible water management into the future. The Participants in the Plan are Eastern Municipal Water District (EMWD), Lake Hemet Municipal Water District (LHMWD), Cities of Hemet and San Jacinto (Public Agencies), and Private Water Producers.

Figure ES.1 Hemet/San Jacinto Groundwater
Management Area and Management Zones
Private Water Producers are those property owners who are pumping groundwater pursuant to overlying water rights, typically for agricultural or domestic uses. Private Water Producers may elect two levels of participation in the Plan, with varying levels of benefits and responsibilities, or may elect not to participate. The details on this matter are described in Section 2 of the Plan document.

The Plan, adopted by the governing bodies of the Plan Participants, has eight primary goals:
 Address pumping overdraft and declining groundwater levels,  Provide for Soboba Tribe prior and paramount water rights, 1 Hemet/San Jacinto Groundwater Management Area
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 Ensure reliable water supply,
 Provide for planned urban growth,
 Protect and enhance water quality,
 Develop cost-effective water supply,
 Provide adequate monitoring for water supply and water quality, and  Supersede the Fruitvale judgment and agreement.

GROUNDWATER AS A CORNERSTONE FOR WATER MANAGEMENT
The goals of the Plan are interrelated and begin with maintaining groundwater as a highquality, low-cost, flexible source of water. Efforts are needed to make this happen, as historical groundwater pumping in excess of the Safe Yield of the groundwater basin has resulted in decreasing trends in water levels. In addition, historical land and water use practices for agricultural irrigation and dairy industry waste have raised the levels of nitrates and total dissolved solids in groundwater. Safe Yield, the long-term average quantity of water that can be pumped without causing undesirable results, has been estimated at 40,000 to 45,000 AFY, while average annual production exceeds this amount by approximately 10,000 to 15,000 AFY.

The 10,000 to 15,000 AFY difference between the long-term average annual groundwater production and Safe Yield is known as overdraft, which can be responsible for creating undesirable conditions in the basin, including degradation of groundwater quality. The Plan assumes a pragmatic and economic approach in setting the target to reduce overdraft, and assumes an overdraft of 10,000 AFY. This will allow the Plan Participants and the Watermaster to initiate and adopt plans and policies to eliminate overdraft with implementation of economically feasible and cost-effective projects. The Plan intends to stabilize or reverse the decreasing trend in water levels through reducing groundwater production to a level that brings the basin production within the Safe Yield of the Management Area. Higher water levels will increase water in storage, decrease energy costs for pumping, and inhibit the migration of poor quality groundwater from surrounding basins, helping to protect groundwater quality in the Management Area.

INTEGRATION OF GROUNDWATER WITH OTHER WATER SOURCES

AND DEMAND MANAGEMENT TO MEET FUTURE WATER NEEDS
The Plan Participants have several options available to increase water supply and reliability in the Management Area. Water used in the Management Area for agricultural and domestic use comes from groundwater, surface water, imports, and recycled water. As shown on Figure ES.2, most of this water has historically been from groundwater, based on 2004 data.

This allows significant opportunities for underutilized sources, particularly recycled water and 2 Hemet/San Jacinto Groundwater Management Area
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winter-time imported water, to replace or augment groundwater production. The regional cooperation developed over the years is also of importance as the supply mix varies between the different water users in the Management Area; by cooperating, the water users can fully utilize their available water resources.
81%
8%
9%
2% Groundwater
Surface Water
Imported Water
Recycled Water
Figure ES.2 Components of Management Area Water Supply
The high-quality groundwater basin also plays an important role in future water availability.

Historical declines in groundwater levels are a concern and a major impetus for the development of this Plan. However, even the dewatered portion of the groundwater basin is a significant asset and allows for the full utilization of the available water supplies mentioned above. The new water supplies can be introduced into the system filling the empty portions of the groundwater basin by either substitution for pumping groundwater (in-lieu recharge) or by placing the water in the groundwater system through seepage from specially designed ponds or through injection from wells (direct recharge). Both these methods benefit the Management Area groundwater basin, which is composed of materials that can store large quantities of water and holds high quality groundwater that can be pumped for usage at a later time. A complex system of faults and other geologic features separate the groundwater system into four Management Zones (see Figure ES.1), which require some degree of individual attention in planning and designing recharge and extraction projects, based on each Management Zone’s unique attributes.

The numerous water supply opportunities along with water conservation by both the Public Agencies and Private Water Producers will be utilized to meet the current and future water needs of the Management Area. Based on the latest data and information on land and water practices, general plans, urban water management plans, and other specific plans, water demand in the Management Area is projected to increase over the course of next 15-20 years (Figure ES.3). Based on these projections, there will also be a shift from agricultural water use 3 Hemet/San Jacinto Groundwater Management Area
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to urban water use, resulting in more stringent water quality requirements to meet drinking water standards.
0 10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
1984198619881990199219941996199820002002200420062008201020122014201620182020 Year
Demand (AFY)
Historical Data Projected Data
Figure ES.3 Historical and Projected Water Demand

PHYSICAL SOLUTION IS THE BASIS OF WATER SUPPLY PROJECT IN

THE MANAGEMENT AREA
As described in the Stipulated Judgment, the Physical Solution is the court decreed method of managing the water supply in the Management Area to maximize the reasonable and beneficial use of the waters, eliminate overdraft, protect the prior rights of the Soboba Tribe, and provide for the substantial enjoyment of all water rights by recognizing their priorities. The Physical Solution consists of numerous water supply and conjunctive use projects, including direct and in-lieu recharge, increased use of recycled water, increased conservation, and improved monitoring. The core project in the Physical Solution is the Hemet/San Jacinto Integrated Recharge and Recovery Program (IRRP). Phase I of the IRRP has been designed, funded, the necessary environmental permits have been acquired, and construction is currently underway.

Phase II is in planning stages. The IRRP is a regional recharge and recovery program to meet the following goals:
 Satisfy Prior and Paramount Soboba Tribe water rights;  Offset the estimated 10,000 AFY overdraft in the Management Area; and  Provide an additional 15,000 AFY to help meet the projected demand increases. 4 Hemet/San Jacinto Groundwater Management Area
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In addition to IRRP, the Plan identifies other projects that can potentially meet the above goals.

These include direct recharge, in-lieu recharge, and recycled water projects.

A FIRM LEGAL AND INSTITUTIONAL ARRANGEMENT
Development of a comprehensive system of water management begins with the legal and institutional framework. To meet the goal of reducing groundwater production to eliminate overdraft, the Public Agencies agreed upon some basic principles as a basis for allocating Base Production rights. Base Production rights establish the initial amount that each Public Agency would be able to pump without the need to replenish the basin. The Base Production rights are calculated on the basis of actual production by Public Agencies during 1995-99 calendar years, and adjusted for specific historical operational activities, such as:
 Recharge Activities;
 MWD San Jacinto Tunnel Seepage;
 Fruitvale Entitlement Water Sold by EMWD to LHMWD, Hemet, and San Jacinto;
 Stream Diversions;
 Conveyance Water Deliveries; and
 Other Considerations.

The Public Agencies have, therefore, agreed to the following Base Production Rights:

Table ES.1 Public Agency Base Production Rights
Public Agency Base Production Rights
(AFY)
Base Production Rights
(Percent)
EMWD 10,869 33.7
LHMWD 11,063 34.2
City of Hemet 6,320 19.6
City of San Jacinto 4,031 12.5
Total 32,283 100
Surface water rights are not impacted and/or changed by the Plan or any other recent agreements. LHMWD diverts water from the San Jacinto River and its tributaries through its pre-1914 water rights to meet their irrigation and municipal water demands, and EMWD has a license to divert water from the San Jacinto River for recharge purposes.

Soboba Tribal water rights are recognized throughout the Plan, and details of the monetary, water quantity, water quality, and property requirements to meet the obligations set forth in the settlement agreement with the Soboba Tribe are discussed in Section 8 of the Plan.

The Institutional Plan, discussed in Section 9 of the document, assigns the administration, 5 Hemet/San Jacinto Groundwater Management Area
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implementation, and monitoring of the Plan to a Watermaster. The Watermaster will consist of one elected official representing each of the Public Agencies and one representative selected by the participating Private Water Producers. The Watermaster will utilize the counsel of legal advisor, as well as provide technical oversight through an Advisor and Technical Advisory Committee. The Watermaster will utilize services of EMWD for recharge operations and administration and monitoring of the projects and the Plan. The relationships and basic responsibilities of these entities are summarized in Figure ES.4. The Watermaster will also review, approve, and adopt the annual budget, which will be funded by administrative assessments and replenishment assessments. The details of Watermaster administration are discussed in Section 9 of the Plan document.

EMWD

TECHNICAL

ADVISORY

COMMITEE

ADVISOR

WATERMASTER BOARD LEGAL

COUNSEL
Management
Evaluation
Recmmendations
Purchase water from MWD
Deliver water to recharge basins
Operation and maintain facilities and systems
Other activities related to physical operations
Data / sample collection
Lab analysis and data compilation
Meter reading / billing / collection / accounting

RECHARGE OPERATIONS ADMINISTRATION AND MONITORING
Figure ES.4 Plan Institutional Setup

IMPLEMENTATION AND PLAN EVOLUTION
The implementation of the Plan, along with any additions or modifications as may become appropriate, and all financial matters relating to Plan activities are the responsibility of the Watermaster. The implementation process can be divided into two processes: implementation and ongoing activities. The schedules for these processes are shown in Table ES.2 and Table ES.3.
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Table ES.2 Implementation Schedule
Months after
Approval of
Stipulated
Judgment
Implementation Item
Month 1 Determine the method of selection for the Private Pumper representative.

Month 2 Select Public Agency and Private Pumper representatives.

Month 3 Hold first meeting of the Watermaster.

Contract with EMWD for Watermaster services.

Month 4 none
Month 5 none
Month 6
Retain legal council and advisor.

Prepare and adopt Rules and Regulations for its own operation as well as for the operation of the Water Management Plan and Judgment.

Review and reissue agreements and MOUs, as needed.

Upon Settlement
Agreement
Implementation
Recognize Tribal water rights.

Table ES.3 Ongoing Schedule
Timing Frequency Activity Responsibility
January 1 Annual Propose Monitoring Program. EMWD
End of January Annual Review Monitoring Program. Advisor End of February Annual Approve budget for Monitoring Program. Watermaster 1st Quarter Annual Advance payment of Administrative
Assessments. Public Agencies
1st Quarter Annual Payment of Replenishment Assessments. Public Agencies Four months
after completion
of calendar year
monitoring
Annual Submit Annual Hemet/San Jacinto
Water Management Area Report. EMWD
As needed As needed Revise safe yield. Advisor
TBD Annual Prepare, File, and Distribute Watermaster
Annual Report. Watermaster
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SECTION 1 INTRODUCTION

1.1 PROJECT BACKGROUND
The stakeholders in the Hemet/San Jacinto Groundwater Management Area (Figure 1.1) (Management Area) have developed the Hemet/San Jacinto Water Management Plan (Plan) to provide a foundation that guides and supports responsible water management in the future.

The local stakeholders involved in the Plan include Eastern Municipal Water District (EMWD), Lake Hemet Municipal Water District (LHMWD), Cities of Hemet and San Jacinto, and Private Water Producers, collectively referred to as “Plan Participants”. EMWD, LHMWD, and the Cities of Hemet and San Jacinto are collectively referred to as “Public Agencies”.

A Policy Committee (PC) of the Plan Participants developed and adopted the Principles for Water Management (Principles), which guide the management, development, and governance of local water supplies. The adopted Principles, along with a variety of technical analyses, guided development of the Plan. The PC established the Principles based on the historical data on the operation of the groundwater basin; historical and projected water demands; and existing and potential future facilities. The California Department of Water Resources (DWR) provided financial, facilitation, and technical support to the PC.

A Technical Committee (TC) supported the PC and served as the investigative and review body to ensure that proper technical analyses were conducted to provide a defensible technical foundation for the Plan. The TC provided technical input to support decisions by the Public Agencies, Private Water Producers, and other stakeholders. DWR also provided financial and technical support to the TC.

A Consultants-Attorneys-Managers (CAM) committee served as an interim body to develop and review technical, legal, institutional, and financial documents, plans, and standards. The CAM committee discussed the technical/policy/legal issues in anticipation of evolving documents and recommendations for action by the policy makers for the PC.

EMWD and LHMWD have also worked with the Soboba Band of Luiseño Indians (Soboba Tribe) and the Federal Government to develop a Settlement Agreement (Agreement) (Appendix A) that would resolve past issues with respect to Tribal water rights and the water management practices in the basin. The Agreement will be supported by two stipulated 9 Hemet/San Jacinto Groundwater Management Area
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!
!
San Jacinto River
Diamond Valley Lake
Lake Skinner
Hemet South
Hemet North
Portion of
Lakeview-Hemet North
San Jacinto
Upper Pressure
Canyon
Hemet
San Jacinto
·|}þ79
·2|}þ43
·|}þ74
·|}þ79
Legend
Management Area
Management Zones*
Hemet North
Hemet South
Canyon
San Jacinto Upper Pressure
! Cities
Major Watercourses
Lakes and Reservoirs
Major Roads
October 2007
Hemet / San Jacinto Water Management Plan
Management Area and Management Zones
Figure 1.1
0 0.5 1
Miles
±
*Source: EMWD Page 307 of 1949

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Introduction
judgments1 that will provide the legal and technical basis for future water supplies for the Soboba Tribe.

1.2 WATER MANAGEMENT PLAN
The Plan, adopted by the governing bodies of the Plan Participants, will provide a roadmap for implementation of the Physical Solution, ensure adequate and reliable sources of future water supply for the Management Area, and meet the Prior and Paramount Soboba Tribe water rights requirements. The Plan may be modified and updated in the future based on, among other things, the availability of new data, updated technical analysis, and changes in the institutional/financial structure of the stakeholders.

1.3 PHYSICAL SOLUTION
As described in the Stipulated Judgment (Appendix B), the Physical Solution is the court decreed method of managing the water supply in the Management Area to maximize the reasonable and beneficial use of the waters, eliminate overdraft, protect the prior rights of the Soboba Tribe, and provide for the substantial enjoyment of all water rights by recognizing their priorities. Therefore, the Physical Solution is a group of water supply and conjunctive use projects that would serve this purpose.

The project that is considered to be the core of the Physical Solution is Phase I of the Hemet/San Jacinto Integrated Recharge and Recovery Program (IRRP). Phase I of the IRRP has been designed, funded, and the necessary environmental permits are being acquired. Phase II is in planning stages. The complete project is designed to recharge (replenish) imported water and extract groundwater at a capacity such that the following goals are met:

1. Satisfy Prior and Paramount Soboba Tribe water rights;

2. Offset the estimated 10,000 acre-feet per year (AFY) overdraft in the Management Area; and

3. Provide an additional 15,000 AFY to help meet the projected demand increases.

Major elements of Phase I of the Project are:
 Modifications to Pump Stations (Warren and Commonwealth);  Construction of Pipelines;

1 These judgments are in the case of Soboba Tribe v. Metropolitan Water District, et. al.; U.S. District Court in Los Angeles, Case No. 00-04208 GAF, and in a Riverside County Superior Court action, yet to be filed.
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 Design and Construction of Recharge Basins;
 Drilling Three Extraction Wells;
 Installation of Pumps and Chlorination Equipment for Three Extraction Wells; and
 Design and Drilling of Three Monitoring Wells.

Additional details on Phase I of the IRRP are presented in Section 3.2.2 of this Plan, and details on Phase II are presented in Section 5.3.1.

In addition to the San Jacinto River Integrated Recharge and Recovery Project, there are other projects that the TC has identified as potential projects to be further considered in the future as part of the Physical Solution for the Management Area. These include direct recharge and in-lieu recharge projects and are described in Section 5.3 of this Plan.

1.4 WATER MANAGEMENT PLAN GOALS
The Principles include eight primary goals for the management of water resources in the Management Area. These are:
 Address pumping overdraft and declining groundwater levels,  Provide for Soboba Tribe prior and paramount water rights,  Ensure reliable water supply,
 Provide for planned urban growth,
 Protect and enhance water quality,
 Develop cost-effective water supply,
 Provide adequate monitoring for water supply and water quality, and  Supersede the Fruitvale judgment and agreement.
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SECTION 2 MANAGEMENT PLAN FRAMEWORK
This section briefly describes the geographic boundaries of the four divisions, or Management Zones, that make up the Management Area and provides a brief history and background on each of the primary stakeholder organizations. Past agreements and related activities leading to the Plan are discussed below, including the role of the state and public participation.

2.1 MANAGEMENT AREA
The Management Area is divided into four Management Zones: The Canyon, San Jacinto Upper Pressure (Upper Pressure), Hemet South, and the Hemet North portion of the Lakeview/Hemet North (Hemet North). The locations of the Management Zones are shown in Figure 1.1. The delineation of the Management Zones is based on the recent update by the Santa Ana Regional Water Quality Control Board (RWQCB) in the Water Quality Control Plan - Santa Ana River Basin (RWQCB, as amended 2004). The RWQCB defined these boundaries on the basis of hydrogeologic conditions to support implementation of specific water quality criteria.

Additional descriptions of the basin hydrogeology are provided in Section 4.

2.2 MANAGEMENT PLAN PARTICIPANTS
A map of the service areas of the Public Agencies near the Management Area and the Soboba Reservation is provided in Figure 2.1. The Plan Participants are briefly described below.

2.2.1 PUBLIC AGENCIES
EMWD, LHMWD, the City of Hemet, and the City of San Jacinto provide water service in various areas of the Canyon, Upper Pressure, Hemet South, and Hemet North Management Zones. A list of governing bodies is provided in Appendix C. Additionally, there are a number of Private Water Producers extracting groundwater for agricultural and domestic use.

2.2.1.1 Eastern Municipal Water District (EMWD)
Since its formation in 1950, EMWD has matured from a small agency primarily serving agriculture to one whose major demands come from domestic customers. In 1951, EMWD annexed to the Metropolitan Water District of Southern California (MWD). With the purchase of the Fruitvale Mutual Water Company (FMWC) in 1971, EMWD acquired all of Fruitvale’s 13 Hemet/San Jacinto Groundwater Management Area
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San Jacinto River
Diamond Valley Lake
EMWD Boundary
Lake Skinner
Hemet Lake Hemet MWD
Water Dept.

San Jacinto
Water Dept.

Soboba Indian Reservation
·|}þ79
·2|}þ43
·|}þ74
·|}þ79
Legend
Major Watercourses
EMWD Boundary
Major Roads
Management Area*
Agency Name
City of Hemet Water Dept.

City of San Jacinto Water Dept.

Lake Hemet MWD
LHMWD & Hemet
Soboba Indian Reservation
Lakes and Reservoirs
October 2007
Hemet / San Jacinto Water Management Plan
Public Agencies and Soboba Reservation
Figure 2.1
0 0.5 1
Miles
±
*Source: EMWD Page 311 of 1949

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assets including appropriative, prescriptive, and riparian water rights; water system, wells, well sites, pumps, and storage; real property, easements, rights, and interests; and franchises, permits, and licenses. Over time, the agency has continued to grow. Today, in addition to providing retail service, EMWD provides wholesale water to the seven local water agencies within its service area, including the three remaining Public Agencies in the Management Area.

As of 2005, EMWD serves approximately 113,000 retail connections, including approximately 200 agricultural connections, in a service area with an estimated population of 567,000 within the 555-square-miles, including many areas outside the Management Area. The population within EMWD’s boundaries is expected to grow to 830,000 by 2025 (EMWD, 2005a), not including the population of the Rancho California Water District.

In addition to wholesale and retail potable water supply, EMWD’s services include wastewater collection and treatment as well as water recycling. The San Jacinto Valley Regional Water Reclamation Facility is an 11 million gallons per day (MGD) plant that provides most of the treatment and water recycling capability for the Management Area.

The five-member Board of Directors comprise the governing body of EMWD and are responsible for setting the policies guiding the operations of the District. Board members are elected to four-year terms by the registered voters from five geographic divisions, which are apportioned on the basis of population distribution. Terms of service are staggered to ensure continuity; public elections are held in at least two divisions every two years. Directors must reside within the division from which they are elected.

The 2004 water use in the portion of the EMWD service area within the Management Area was 13,900 AFY, and it is projected to increase to 21,000 AFY by the year 2020 (EMWD, 2005b).

2.2.1.2 Lake Hemet Municipal Water District (LHMWD)
LHMWD was created in its present form in 1955, but its origins date back to the late 1880s. The service area covers 16,500 acres in the Hemet/San Jacinto Valley area with an additional 2,200 acres in Garner Valley. LHMWD provides water to residential and agricultural customers in its service area. All wastewater collection and treatment within the LHMWD area is performed by EMWD.

LHMWD operates the Hemet Dam and reservoir. The dam, an engineering marvel at the time of its construction in 1895, is a gravity-type, granite dam. LHMWD historically treated a portion of this surface water for domestic use, however since 1998 the surface water treatment plant has been offline and all surface water usage has been for untreated agricultural uses. 15 Hemet/San Jacinto Groundwater Management Area
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LHMWD usually maintains approximately 11.7 million gallons in storage in the Hemet/San Jacinto Valley.

LHMWD customers are represented by a publicly elected board of five directors from five divisions, representing approximately 13,700 domestic and 52 agricultural connections within a 21-square mile service area with a 2005 population of approximately 39,100. The population within the LHMWD service area is expected to grow to approximately 49,500 by 2025 (LHMWD, 2005).

The 2004 water use within the LHMWD service area was estimated to be 16,900 AFY. Due to the expected benefits of more robust conservation efforts, demand is projected to remain fairly constant over the next several years despite an increasing number of service connections.

Demand in 2020 is expected to be 16,300 AFY before increasing above the 2004 demand level in years thereafter (LHMWD, 2005).

2.2.1.3 The City of Hemet
The development of Hemet began in 1887 with the formation of the Lake Hemet Water Company and the Hemet Land Company by W. F. Whittier and E. L. Mayberry. The completion of the Hemet Dam in 1895, the formation of Lake Hemet behind the dam, and a water distribution system to and through the valley made future development of the Hemet area possible.

As of 2005, the city had a population of 78,600 with an area of approximately 26 square miles.

City of Hemet anticipates a population growth to 154,000 by 2025 (Hemet, 2006).

The City of Hemet was incorporated on January 20, 1910 with a population of 992. The city government is a Council/Manager form of government with seven elected positions, which includes five Council Members, one City Treasurer, and one City Clerk. The Mayor is elected by the Council Members and serves a one-year term. All Council Members serve a four-year term.

The City of Hemet Water Department treats and distributes water to 9,500 connections, covering 5 square miles of the city area. The 2005 population of the Water Department’s service area is 20,200 and is projected to grow to 22,300 by 2025. EMWD and LHMWD serve the remaining 21 square miles of the city, with 7,830 and 3,025 connections, respectively. All wastewater collection and treatment within the City of Hemet area is performed by EMWD.

The 2004 water use within the City of Hemet Water service area was estimated to be 6,000 AFY, and is projected to increase to 6,700 AFY by year 2020 (Hemet, 2006). 16 Hemet/San Jacinto Groundwater Management Area
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2.2.1.4 The City of San Jacinto
Incorporated in 1888, San Jacinto is one of the oldest communities in Riverside County. The city has a Council/Manager form of government with a five member Council that includes a Mayor and Vice Mayor. The City of San Jacinto Water/Wastewater Divisions are responsible for the health and safety of the community through the delivery of the potable water supply and the collection of wastewater. The city wastewater collection system is maintained by this Division while wastewater treatment service is provided by EMWD.

The 2005 population of the city was 34,100; it is anticipated the population of the city will grow to 63,600 by 2025 (San Jacinto, 2005). The City of San Jacinto Water Department serves the central portion of the city with approximately 3,700 residential and commercial service connections. The 2005 population of the Water Department’s service area is 13,200 and is projected to grow to 24,000 by 2025. The remaining portions of the city are served by EMWD and LHMWD, which have 4,636 and 475 service connections within the city boundaries, respectively.

The 2004 water use within the City of San Jacinto water service area was estimated to be 3,100 AFY, and is projected to increase to 5,100 AFY by year 2020 (San Jacinto, 2005).

2.2.2 PRIVATE WATER PRODUCERS
Private Water Producers are those property owners who are pumping groundwater pursuant to overlying water rights, typically for agricultural or domestic uses. Historically there was no comprehensive metering program in-place to monitor groundwater production and/or water use by the Private Water Producers. EMWD collected groundwater data through an informal, voluntary monitoring program. In 2004 the Hemet/San Jacinto Groundwater Monitoring Program was initiated by the Public Agencies and the DWR to collect, analyze, and compile groundwater-related data (EMWD, 2005).

It is estimated, on the basis of limited data and land use analysis, that the 2004 water use by Private Water Producers was about 22,200 AFY. This annual level of water use is unusually low, compared to a long-term average of 31,000 for 1984-2004 (WRIME, 2003a). Water use is expected to drop to approximately 16,000 AFY by 2020.

The Public Agencies recognize the overlying water rights of Private Water Producers, and the Principles provide several options for voluntary participation in the Plan by the Private Producers. For more details, please see the Principles provided in Appendix D. 17 Hemet/San Jacinto Groundwater Management Area
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There are two classes of participants, Class A and Class B; both agree to have their wells metered and to have those meters read by EMWD personnel at no cost to the participants. The two types of participants are further explained below.

2.2.2.1 Class A Participants
A Private Water Producer can sign an agreement acknowledging the existence of the Plan, while not being required to participate in Plan implementation. Class A participants are allowed to vote for and/or serve as the Private Water Producer representative on the Watermaster board. The Class A participants may continue to pump from their property without assessments by the Watermaster, so long as the water is put to a reasonable and beneficial use as authorized by California law.

The Class A participants have the right to convert to Class B during a grace period that ends 3 years after the entry of the Stipulated Judgment, and upon payment of the total assessments without interest, as if they were Class B participants to begin with.

2.2.2.2 Class B Participants
A Private Water Producer can become a Class B participant by electing to limit annual pumping to their estimated average annual production during the 1995 – 1999 calendar years and by agreeing to pay replenishment assessments on amounts in excess of that average annual production.

Like Class A Participants, Class B Participants can vote for and/or serve as the Private Water Producer’s representative on the Plan’s governing board. Additional benefits are given to Class B Participants as well. Under certain conditions, the Class B Participant can convey their Adjusted Production Right to the Plan or to a Public Agency. Also, upon conversion from agricultural to urban uses, Class B Participants would receive credits from the Public Agency toward the satisfaction of any requirements then in effect for water supplies and toward any fees associated with water supply that the Public Agency may then have in effect. For more information on production rights, please see Section 6.

2.2.2.3 Non-Participants
A Private Water Producer can elect not to participate in the Plan and not to formally acknowledge its existence. These non-participants will continue to exercise their water rights unaffected by the Plan.
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2.2.3 ROLE OF STATE OF CALIFORNIA DEPARTMENT OF WATER RESOURCES In June 2001, the DWR executed a Memorandum of Understanding (MOU) with EMWD, LHMWD, and the Cities of Hemet and San Jacinto. Initially, DWR worked to bring the group together to establish a mutual understanding of the issues in the Management Area. The goals of the group were determined and included the following: (i) finalizing an approach to groundwater management; (ii) settling on a mechanism to involve the Plan Participants in the water rights claim by the Soboba Tribe; (iii) agreeing on the basic components of a regional conjunctive use program; and (iv) establishing the necessary institutional structures. Major involvement of the DWR to-date include providing technical support to the TC and PC on resolving various technical and data analysis issues, providing facilitation and mediation support to the PC and the CAM committee, providing financial support on a number of studies and projects, including the Plan document.

2.2.4 PUBLIC PARTICIPATION
There have been numerous opportunities for public input into the development of the Plan.

Meetings were held for the public at the beginning of the Plan process to provide information and gather input. While the Plan was being developed, more opportunities were provided for public input, including TC and PC meetings and meetings with the Private Water Producers, all of which were open to the public. The public was also given the opportunity to review the draft of the Plan and submit comments.

2.3 PREVIOUS AGREEMENTS AND INSTITUTIONAL BODIES
During the course of history of water supply in the Management Area, there have been other agreements and institutional bodies that have been formed and operated to facilitate the management of water supplies. Following is a brief description of these agreements and institutional bodies, which are no longer active or are superseded by this Plan.

2.3.1 FRUITVALE JUDGMENT AND DECREE
The Fruitvale Judgment and Decree (The City of San Jacinto, et al., v. Fruitvale Mutual Water Company, et al., No. 51546, Riverside County) was entered into Book 72, Page 164 of Judgments, Riverside County, on June 4, 1954. Under the Judgment and Decree, FMWC could extract groundwater from an area which largely corresponds to the Canyon Management Zone without any restrictions as long as a specified criteria regarding static depth to groundwater and production limits were met. After purchase of FMWC, EMWD was subject to the 19 Hemet/San Jacinto Groundwater Management Area
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provisions of the Judgment and Decree. The Water Management Plan and related Stipulated Judgment will subsume and supersede the 1954 Fruitvale Judgment and Decree, along with any other agreements between EMWD and other agencies related to the FMWC acquisition, provided that none of the service area agreements included in the Fruitvale documents or those related to mutual aid or system interties are affect by this Plan or the Stipulated Judgment.

In 1971, EMWD purchased all of FMWC’s assets and water rights, and FMWC was dissolved.

EMWD also agreed to continue to provide to the Cities of Hemet and San Jacinto and LHMWD the amounts of water which they had been entitled to receive as shareholders in FMWC. These deliveries were known as “entitlement water” and the water was provided at a fixed rate, subject to annual adjustments. The amounts of water to be provided were:
 City of Hemet: 6.39% of the greater of FMWC pumping or 9,000 AFY;  City of San Jacinto: 0.38% of FMWC pumping; and
 LHMWD: 3.74% of FMWC pumping.

The reporting by EMWD since the purchase of FMWC shows that an average of approximately 10,000 AFY was pumped from FMWC wells. Of this total, an average of 61% was from Upper Pressure, 33% was from Canyon, and 6% AFY was from Hemet South.

2.3.2 HEMET/SAN JACINTO GROUNDWATER ASSOCIATION
The Hemet/San Jacinto Groundwater Association (Association) was formed in 1991 to provide an over-arching organization to proactively address groundwater issues in the Management Area. The Association Board of Directors included representatives from the Private Water Producers, EMWD, LHMWD, and the Cities of Hemet and San Jacinto.

The Mission Statement and Articles of Association were approved on September 9, 1991. The Mission Statement read: The Hemet/San Jacinto Groundwater Association serves as the regional groundwater management entity for portions of the San Jacinto Valley groundwater basins. The Mission of the Association is to maintain a secure reliable and reasonably priced supply of high quality water for groundwater producers in the basin. The Association will implement its Mission by developing and applying sound groundwater basin management concepts.

With regard to the area covered by the Association, the Articles of Association state: The portions of the San Jacinto Valley Groundwater Basins shall include the Canyon area, the Intake area, and the upper pressure area, of the San Jacinto Hydrologic Subarea; the Hemet Hydrologic Subarea; and a portion of the Winchester Hydrologic Subarea. Such also being that portion of the San Jacinto Valley southeasterly of Bridge Street and northeast of one-quarter mile west of California Avenue in the area of Simpson Road, together with tributary basins, streams, and watersheds. 20 Hemet/San Jacinto Groundwater Management Area
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In May 1994, following receipt of the Soboba Band of Mission Indians water rights settlement claim, requests were submitted to the U.S. Department of the Interior by EMWD, the Association, and the Soboba Tribe, to appoint an Indian Water Rights Settlement team to participate in settlement negotiations. The activities of the Association stopped when the current negotiations took precedence.

2.4 ACTIVE INSTITUTIONAL BODIES
As part of the on-going activities leading to the development and adoption of the Principles, the Stipulated Judgment, and agreement with the Soboba Tribe, the following institutional bodies are formed:
 Hemet/San Jacinto Policy Committee (PC),
 Hemet/San Jacinto Technical Committee (TC), and
 Hemet/San Jacinto Consultant-Attorney-Managers Committee (CAM).

Following is a brief description of each body, their role, and participants.

2.4.1 HEMET/SAN JACINTO POLICY COMMITTEE
The PC is comprised of elected officials representing EMWD, LHMWD, the Cities of Hemet and San Jacinto, and representatives of the Private Water Producers. Each entity, including the Private Water Producers, has three representatives on this committee. In the case of the Public Agencies, the PC representatives are two members of the Board of Directors or City Council and the agency or city manager. Three representatives reflecting the Private Water Producers interests (agricultural, dairy, golf course, etc.) are selected by the Private Water Producers. Each entity participates and votes as a unit in the PC. The decision making process is based on consensus. DWR provides a facilitator, a project manager, and technical experts to support and facilitate the decisions of the PC and TC members. Observers to the PC include other Private Water Producers, attorneys, and/or consultants representing various members, and representatives of the Soboba Tribe.

The list of participants in the PC at the time of adoption of this Plan is presented in Appendix E.

2.4.2 HEMET/SAN JACINTO TECHNICAL COMMITTEE
The PC formed a TC to compile, share, interpret, evaluate, and reach agreement on data; to define problems; and to address the PC's technical issues and make recommendations to the PC.

Committee membership consists of representatives assigned by the Public Agencies, the Private 21 Hemet/San Jacinto Groundwater Management Area
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Water Producers, and DWR and an engineering consultant provided by DWR as a neutral thirdparty participant. The representative from LHMWD served as the TC chairman. Through a collaborative effort, the TC developed the data set (WRIME, 2003a) that provides the basis for understanding the area’s hydrology, and has identified potentially feasible initiatives, programs, and projects to enhance the safe yield of the Management Zones.

The list of participants in the TC at the time of adoption of this Plan is presented in Appendix E.

2.4.3 HEMET/SAN JACINTO CONSULTANT-ATTORNEY-MANAGERS COMMITTEE The PC formed the CAM Committee, consisting of technical, legal, and management representatives of each Public Agency, assisted by the DWR project manager and facilitator.

The role of the CAM Committee is to facilitate the preparation of technical and legal documents in support of the Stipulated Judgment, the Agreement, and the Plan. Tasks assigned to the CAM Committee include: the development of contractual agreements and MOUs, and the evaluation of the financial impacts to the community for consideration and action by the PC.

The CAM Committee provides administrative or policy recommendations to the PC.

The list of participants in the CAM Committee at the time of adoption of this Plan is presented in Appendix E.

2.5 RELATED GROUNDWATER MANAGEMENT ACTIVITIES
There have been numerous investigations and technical analyses conducted in the Management Area. This section highlights more recent reports that were produced to support the Plan, reviewed by the TC, and used by the PC to make decisions. There has been a significant amount of work completed by the local agencies documented in the form of presentations to the PC and the TC. These include:
 Analysis of EMWD Fruitvale water transfer and use by other agencies;  Analysis of Conveyance (export) water from the Management Area;  Reconciliation of the Groundwater Production records amongst the participants;  Estimation of basin overdraft;
 Review and assessment of the San Jacinto Watershed Groundwater Model; and  Recycled water use and activities.

A Basin Assessment Study was undertaken in 2003 by the local stakeholders with the support of DWR in order to evaluate the existing conditions of the Management Area, evaluate likely future conditions, and develop and evaluate potential conjunctive use opportunities in the 22 Hemet/San Jacinto Groundwater Management Area
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Management Area. To support the Basin Assessment Study, the following Technical Memoranda (TM) and reports were produced:
 Operational Yield Study, Hemet/San Jacinto Groundwater Management Area (WRIME, 2003d);
 Technical Memorandum No. 1 (TM1), Assessment of Historical and Projected Land and Water Use Data (WRIME, 2003a);
 Technical Memorandum No. 2 (TM2) - Description of Preferred Potential Conjunctive Use Projects (WRIME, 2003c);
 Basin Assessment Study Executive Summary (ES) (WRIME, 2003b); and  Draft Technical Memorandum No. 3 (TM3) - Analysis of Impacts of Conjunctive Use Projects (January 2004).

The Operational Yield Study, Hemet/San Jacinto Groundwater Management Area presents estimates of the operational yield of the Management Area. Several time periods were used to examine the water budgets of each Management Zone and the Management Area as a whole under various hydrologic conditions. The purpose of the report was to review the previous estimates of hydrologic water budget and reconcile differences in the previously prepared water budgets, and to achieve a consensus on the assumptions, data, methods, and yield of the basin. The long-term period of 1958-2001 was used since it had the best available data at the time and represented a balanced hydrologic period, with wet, dry, and normal periods similar in frequency to the overall historical record.

Hemet/San Jacinto Basin Assessment Study – Basin Assessment Report/Integrated Water Management Plan, Technical Memorandum No. 1 (TM 1), Assessment of Historical and Projected Land and Water Use Data presents background and available data, and analyzes the quality and utility of the data for evaluating basin conditions. The data presented in TM 1 include historical groundwater production, water diversions, water sales, and imported water. The purpose of the report was to obtain agreement on existing conditions, document assumptions, and provide a baseline for purposes of future comparison.

Hemet/San Jacinto Basin Assessment Study – Basin Assessment Report/Integrated Water Management Plan, Technical Memorandum No. 2 (TM 2), Identification and Description of Potential Conjunctive Use Projects presents the process and basis of selection of sites for further evaluation for potential conjunctive use projects. Seven sites were selected from an initial group of 15. The sites were ranked based on screening criteria that included: general site characteristics (size, recharge needs, ownership, etc.), recharge water sources, hydrogeologic suitability, sub-basin interactions, engineering suitability, land use suitability, and environmental impacts. An initial screening was also performed for two potential in-lieu projects. 23 Hemet/San Jacinto Groundwater Management Area
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Hemet/San Jacinto Basin Assessment Study – Executive Summary provides a summary of TM 1 and TM 2.

Draft Hemet/San Jacinto Basin Assessment Study – Basin Assessment Report/Integrated Water Management Plan, Technical Memorandum No. 3 (TM 3), Analysis of Impacts of Conjunctive Use Projects (January 2004) presents a summary of available information on seven potential recharge sites and two potential in-lieu sites for conjunctive use. Draft TM 3 synthesizes information from multiple sources to compare potential recharge sites and proposes preferred sites and documents any additional study or data needs. The TM 3 was presented to the TC in draft form, and comments were received. Due to initiation of the development of the Water Management Plan, the work to finalize TM 3 was re-scoped, which obviated the need to prepare a final TM 3.

Significant other work has been performed and documented by EMWD. These reports include planning documents and feasibility studies with modeling efforts:
 West San Jacinto Groundwater Basin Management Plan;
 Hemet/San Jacinto Water Management Area 2004 Annual Report;  Hemet-San Jacinto Recharge and Recovery Program- Feasibility Study;  Regional Groundwater Model for the San Jacinto Watershed;  Hemet-San Jacinto Integrated Recharge and Recovery Program- Feasibility Study Groundwater Flow Model;
 Lake Elsinore and Canyon Lake Nutrient Source Assessment;  Groundwater Infiltration Predictions Using Surface Water Model Output for the San Jacinto Watershed;
 Development of the Regional Water Resources Database (RWRD); and  Preliminary Design Report for the San Jacinto Agricultural In-Lieu Water Supply Project.

West San Jacinto Groundwater Basin Management Plan (EMWD, 1995). This plan was prepared in accordance with Assembly Bill 3030. This groundwater management plan covers the western portion of the EMWD service area in the San Jacinto Watershed. Since the groundwater management in the eastern San Jacinto watershed was being developed under Association in the early 1990s, the Management Area was excluded from the AB3030 planning process. The goal of the West San Jacinto Groundwater Basin Management Plan is “to maximize the use of groundwater for all beneficial uses in such a way as to lower the cost of water supply and to improve the reliability of the total water supply for all water users in the West San Jacinto Groundwater Basin Management Area” (EMWD, 2004). Implementation of the plan included the establishment of an Advisory Committee; Management Zone prioritization; and 24 Hemet/San Jacinto Groundwater Management Area
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groundwater resources evaluation including groundwater quality and level monitoring, extraction monitoring, and hydrogeophysical investigations.

Hemet/San Jacinto Water Management Area 2004 Annual Report (EMWD, 2005b). As part of the reporting process to the Management Area stakeholder group, EMWD produces annual reports that summarize groundwater quality, level, and extraction monitoring results, and provide an update on activities and progress toward meeting the previous year’s recommendations and goals of the groundwater management plan. The first annual report for the Hemet/San Jacinto Area was produced in June 2005.

Hemet-San Jacinto Recharge and Recovery Program- Feasibility Study (Psomas, 2003). This report documents the feasibility of a proposed recharge project. The proposed Hemet/San Jacinto Integrated Recharge and Recovery Program consists of average annual recharge of 43,750 acre-feet (AF) based on long-term hydrology at a site within the City of Hemet and near the San Jacinto River’s confluences with Poppet and Bautista Creeks. This program involves the construction of approximately 15 recharge ponds on a 100-acre site in the San Jacinto River channel, construction of new pipeline facilities, upgrade of existing pump stations, and construction of new extraction wells at various locations within the Management Area. In order to assess the feasibility of the proposed program, a comparative analysis was completed to evaluate potential alternatives to the preferred option of recharging imported water.

Regional Groundwater Model for the San Jacinto Watershed (TechLink Environmental, 2002a). This report documents the development of a regional groundwater flow and transport model for the San Jacinto watershed basin within EMWD’s service area, an area that includes the Management Area as well as the areas to the west included in the West San Jacinto Groundwater Basin Management Plan. Regional Groundwater Model for the San Jacinto Watershed includes review of available data, development of a conceptual model, setup of a flow and transport model, calibration of the model, and simulation of management scenarios.

Hemet-San Jacinto Integrated Recharge and Recovery Program - Feasibility Study Groundwater Flow Model (TechLink, 2002b). This report documents the application of the regional groundwater model to evaluate the various recharge and recovery activities and alternative water supplies.

These model simulations are intended to compare project and no-project alternatives, evaluate the aquifer capability to store large volumes of water, and evaluate the availability of recharged water for extraction.

Lake Elsinore and Canyon Lake Nutrient Source Assessment (TetraTech, 2003). TetraTech developed a watershed model of the San Jacinto watershed for the Lake Elsinore and San Jacinto Watershed Authority and the RWQCB as part of the Lake Elsinore and Canyon Lake Nutrient Source Assessment. The model provided a framework for nutrient source assessment through representation of contributing land uses in a subwatershed network and subsequent 25 Hemet/San Jacinto Groundwater Management Area
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determination of required nutrient load reductions and allocations to Total Maximum Daily Load (TMDL) objectives. Relating to the Management Area, the report showed that nutrients from the Management Area only reach the lakes when Mystic Lake overflows.

Groundwater Infiltration Predictions Using Surface Water Model Output for the San Jacinto Watershed (TetraTech, 2004). This report documents the update and modification of the watershed model by TetraTech to support EMWD’s development of a groundwater model of the San Jacinto River basin to simulate aquifer storage in the region. The update and modification included extension of the modeling period from January 1984 to March 2003, division of one subwatershed into 4 subwatersheds, and modification of model output. The model was validated and scenarios were run.

Regional Water Resources Database (EMWD, 2005c). A RWRD was developed for EMWD in 2004 to house the existing and future groundwater-related records and to interface Geographic Information System (GIS) maps and aerial photographs. The RWRD contains information for groundwater levels and extraction; streamflow and diversions; well information, construction data, downhole logs, and well/aquifer pump tests; precipitation; temperature; evaporation; imported water usage and quality; conjunctive use; and water quality data from other laboratories and published reports. While no formal document is available to-date describing the full development and implementation of this project, Regional Water Resources Database presents a concise summary of the capabilities of this important component of data management in the region.

Preliminary Design Report for the San Jacinto Agricultural In-Lieu Water Supply Project (Engineering Resources of Southern California, 2005). This report details how recycled water could be incorporated into existing irrigation infrastructure and how to be consistent with the regulatory constraints associated with recycled water use. This included study of water demands, pipeline alignment and size, and environmental issues and resulted in the development of a preliminary plan and cost estimate. The preliminary plan included 13,200 feet of 24-inch pipeline serving Rancho Casa Loma and Scott Brothers Dairy Farms. Total irrigation demand from these farms is estimated at 8,640 AFY. Of this amount, the project could deliver 3,215 AFY due to limited availability of recycled water during the summer months. The project is estimated to take 13 months to complete.
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SECTION 3 WATER MANAGEMENT PLAN ELEMENTS
The elements of this Plan include water management goals and a set of management strategies that discuss and identify the actions necessary for meeting the goals.

3.1 MANAGEMENT PLAN GOALS
The Plan has eight primary goals derived from the Principles and the Agreement. Each of the goals, listed below, is briefly discussed in subsequent sections:
 Address pumping overdraft and declining groundwater levels,  Provide for Soboba Tribe prior and paramount water rights,  Ensure reliable water supply,
 Provide for planned urban growth,
 Protect and enhance water quality,
 Develop cost-effective water supply,
 Provide adequate monitoring for water supply and water quality, and  Supersede the Fruitvale Judgment and Decree.

3.1.1 ADDRESS PUMPING OVERDRAFT AND DECLINING GROUNDWATER LEVELS The Principles and the Stipulated Judgment recognize that groundwater levels within the Management Area have generally been declining for a number of years, and that the Management Area is presently in a condition of groundwater overdraft. The amount of groundwater overdraft is estimated to range from 10,000 to 15,000 AFY. This Plan has a goal of reducing the overdraft in the short-term, and completely eliminating the annual overdraft in the long-term. The timeframe will depend on the extent of overdraft, as more knowledge is gained through the years. For example, a six-year period would be needed to eliminate overdraft if there is an annual overdraft of 10,000 AF.

The Principles identify management strategies to be included in the Plan to reduce overdraft and ensure a long-term supply of reliable water for current and future uses. The Plan contains both management (non-structural) and capital facility (structural) elements to reduce demand and/or increase the available supply. The management elements include: reduction in native groundwater production; enhanced recharge with local runoff, imported, and/or recycled water; and water conservation programs. Short-term planned reductions in pumping are part 27 Hemet/San Jacinto Groundwater Management Area
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of the Plan while further supplies are obtained through the identified management elements.

The management strategies are described in more detail in Section 3.2.

3.1.2 PROVIDE FOR SOBOBA PRIOR AND PARAMOUNT WATER RIGHTS The Agreement with the Soboba Tribe provides for financial obligations, settlement of all water rights claims, and water purchases from MWD, including infrastructure and groundwater storage. The Plan requires that all parts of the Agreement with the Soboba Tribe be met. The management elements to ensure this include: recognition of 9,000 AFY of Soboba Tribe water rights and up to 4,100 AFY of water use in Canyon and Upper Pressure Management Zones for the first 50 years from the date of Settlement, purchase of replenishment water, and MWD's long-term average delivery of 7,500 AFY of imported water.

3.1.3 ENSURE RELIABLE WATER SUPPLY
Reliability is a key component of any water supply system. This goal of the Plan is to ensure that the Public Agencies have a consensus and commitment to develop a comprehensive water supply portfolio that realizes all potential opportunities, and that plans are in place to adapt to changing demands, natural disasters, and drought conditions. Such a portfolio should rely on a range of sources of water supply and include a large component of local supply and storage.

These objectives minimize, to the extent possible, reliance on weather patterns, over-stressed aquifers, and over-allocated imported water. The Plan elements that address these goals include imported and recycled water use.

3.1.4 PROVIDE FOR PLANNED URBAN GROWTH
The Management Area, like much of the Inland Empire area of Southern California, is experiencing dramatic urbanization. The Principles and the Plan recognize and acknowledge that the Management Area will continue to experience residential, commercial, and industrial growth and development, and that the existing water production and service systems will need to be expanded to meet this growth. This urbanization will affect water supplies in several ways. Urban development on non-irrigated lands will increase water use. Urban development and conversion of irrigated lands may not significantly increase water use, but the urban water use requires a more dependable, higher quality water supply. It is estimated that at least 15,000 AFY incremental water supply capacities over the existing Base Production Rights of Public Agencies must be dedicated to adequately serve this growth. The Plan will help local communities comply with recent changes in state law effective January 2002 (SB 221 and SB 610) requiring municipal suppliers, water districts, and cities or counties to document water availability from all sources in normal, dry, and multiple dry years whenever land use decisions 28 Hemet/San Jacinto Groundwater Management Area
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are made. Planned urban growth, as identified in prevailing land use and general plans, or in approved Urban Water Management Plans (UWMP), provided the basis for all demand forecasts and assumptions in the Plan.

3.1.5 PROTECT AND ENHANCE WATER QUALITY
The Management Area has some of the highest quality groundwater in the San Jacinto Watershed, but it has its own problems and issues. Nitrates and Total Dissolved Solids (TDS) concentrations have historically increased as the area experienced urban and agricultural growth. As noted above, urban uses will replace agricultural uses, resulting in more stringent water quality standards for most constituents, including nitrates. The Plan seeks to meet goals for water quality through preventing degradation of the groundwater due to activities in the Management Area, and as a result of implementation of the Plan. Each of the Public Agencies also seeks to prevent degradation or to improve groundwater quality to avoid high costs for drinking water treatment.

3.1.6 DEVELOP COST-EFFECTIVE WATER SUPPLY
Equitable distribution of costs and benefits are part of the Plan. It is important that the Plan elements are selected and implemented in a way that keeps costs to a minimum so as to keep water bills as low as possible for customers. Cost management includes purchasing imported water at low rates; utilizing groundwater storage space; fully utilizing existing infrastructure; promoting conservation; efficiently implementing new infrastructure; and maintaining good quality groundwater and surface water to keep treatment costs low. The Public Agencies also seek to cost-effectively reclaim municipal wastewater for beneficial reuse whenever possible.

3.1.7 PROVIDE ADEQUATE MONITORING FOR WATER SUPPLY AND WATER QUALITY Monitoring programs will be implemented to determine if the Plan’s goals are being met; to document that anticipated benefits are being achieved; and to predict future needs. Included in the monitoring should be water quality, sampled at sufficient locations to be representative, with analysis for all constituents of concern. In addition, the monitoring program should include monitoring of water levels, well metering, and tracking of imported water and recycled water availability and deliveries. Monitoring can also be used to improve yield estimates and groundwater model performance through the development of better estimates of stream recharge and other components. The results of monitoring will be used to strengthen or relax actions needed to meet Plan goals.
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3.1.8 SUPERSEDE THE FRUITVALE JUDGMENT AND DECREE
The Fruitvale Judgment and Decree (The City of San Jacinto, et al., v. Fruitvale Mutual Water Company, et al., No. 51546, Riverside County) was entered into Book 72, Page 164 of Judgments, Riverside County, on June 4, 1954. EMWD, as successor in interest to FMWC, is subject to the provisions of the Judgment and Decree. Provisions in the document are discussed and summarized in Section 2 of this Plan. The Stipulated Judgment and its Water Management Plan are to supersede the Fruitvale Judgment and Agreement subject to certain exceptions in Section 3.5 of the Stipulated Judgment.

3.2 WATER MANAGEMENT PLAN STRATEGIES
To meet the stated goals of the Plan, the stakeholders have adopted the following specific strategies.

3.2.1 REDUCE PUBLIC AGENCY NATIVE GROUNDWATER PRODUCTION The Public Agencies have agreed to reduce native groundwater production so that total production is within the Safe Yield of the Management Area. The average annual groundwater production in the Management Area for the hydrologic period 1958-2004 is estimated to be 54,800 AFY. The initial estimate of Safe Yield is 45,000 AF. The Public Agencies have also agreed to a 10% reduction from each Base Production Right in the first full year after entry of the Stipulated Judgment. The Public Agencies’ share of Safe Yield is calculated based on their Adjusted Production Right, and is discussed further in Section 11. Within the first six years, the Watermaster will make a determination of the Safe Yield of the Management Area. Thereafter, the Safe Yield shall be reviewed and modified, if necessary, upon the recommendation of the TC or as the Watermaster may determine. Until Adjusted Production Rights are consistent with the Public Agencies' share of Safe Yield, the Watermaster will determine the required reductions in Adjusted Production Rights in each subsequent year to achieve Safe Yield within a reasonable period of time as determined by the Watermaster. The Watermaster is to consider the extent of the overdraft, the economic impact on the parties bound by this Judgment, and other relevant factors in determining the total and pro-rata shares of Adjusted Production Rights. The goal is to achieve production at the same level as Safe Yield over a six-year period assuming an annual overdraft of 10,000 acre-feet. In the event the extent of the overdraft is different than assumed, then the period of time reasonably required to reach Safe Yield may be extended or reduced accordingly. However, in no event shall any reduction for any Public Agency be more than 10% of the Adjusted Production Rights of the prior year. 30 Hemet/San Jacinto Groundwater Management Area
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3.2.2 IMPLEMENT THE SAN JACINTO RIVER RECHARGE AND RECOVERY PROJECT The stakeholders have agreed that Phase I of the IRRP is the primary project considered to be the core of the Physical Solution. The stakeholders are working towards an agreement for Phase I of the IRRP project which documents their agreement on the ownership, financing, and operation of the facilities.

The information presented here is based on previously published documents adjusted when appropriate based on the latest knowledge at the time of publication of the Plan.

Phases I and II of the IRRP are designed to recharge (replenish) imported water and extract groundwater at a capacity such that the following goals are met:
 Satisfy the Tribe's prior and paramount rights as set forth in the Agreement with the Tribe by providing an average annual supply of 7,500 acre-feet pursuant to the terms of such agreement. The proposed Program would provide the MWD with the right to store up to 40,000 acre-feet of imported water in the Upper Pressure Sub-basin as advance deliveries under its agreement to provide an average annual supply of 7,500 acre-feet.
 Offset the existing overdraft of the Management Area, estimated at approximately 10,000 AFY.
 Provide approximately an additional 15,000 AFY of water storage to help meet projected demand increases.

Major elements of Phase I of the Project are (Figure 3.1):
 Modifications to Pump Stations (Warren and Commonwealth);  Construction of Pipelines;
 Design and Construction of Recharge Basins;
 Drilling Three (3) Extraction Wells;
 Installation of Pumps and Chlorination Equipment for Three (3) Extraction Well; and
 Design and Installation of Three (3) Monitoring Wells.

The project is designed and implemented in two Phases. While project Phase I activities are defined in detail, Phase II of the project is defined at conceptual level and the detailed design will be developed in the future.

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Wa
rrenPumpStation
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·|}þ74

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Figure3.1
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3.2.2.1 Phase I
This phase of the project consists of the construction of the San Jacinto Integrated Recharge and Recovery Project, which will provide up to 42 cubic feet per second (cfs)* of recharge water capacity. Phase I is scheduled to be completed by December 2008*, and will cost approximately $16.2* million. Major activities during Phase I are:

1. Completion of Environmental Process - The Environmental Impact Report (EIR) was prepared and adopted in August of 2004. Additional permitting requirements include Section 7 consultation with USFWS and issuance of Biological Opinion by the appropriate federal agency.

2. Acquisition of Land - A 100 acre parcel has been purchased by EMWD for required habitat mitigation measures for a 35 acre* parcel that is dedicated to recharge basins. In addition, EMWD is in the process of acquiring approximately one acre of land (in several parcels) for monitoring wells.

3. Approval, Advertising, and Award of Construction Contract - The EMWD Board of Directors has approved the bidding process.

4. Drilling of Extraction Wells No. 1, 2, and 3 - This includes construction and testing of three 18-inch diameter extraction wells, each to a depth of approximately 1,000 feet.

5. Installation of Pump and Chlorination Equipment for Wells No. 1, 2, and 3 - This includes installation of pump and chlorination equipment, appurtenances and site improvements required to complete and operate the new extraction wells.

6. Modifications to the Pump Station - This includes modifications to the Warren and Commonwealth Pump Stations. The modifications include upgrades to increase pump station capacity to provide a seasonal maximum of 42 cfs* to the recharge basins.

7. Construction of Recharge Basins - This activity includes construction of six recharge ponds within the San Jacinto river bed in two clusters of three ponds each. The footprint of the recharge area will be approximately 35 acres*, along the west side of the San Jacinto River, immediately upstream of the river confluence with the Meridian Channel.

8. Construction of Pipelines - This includes design and construction of pipelines and appurtenances to convey, regulate, and meter raw imported water flows into the recharge basins. Pipelines include two (2) 24-inch diameter laterals to convey water from an existing 33-inch diameter transmission main along the proposed Ramona Expressway alignment to the first basin in each of the two basin clusters.

There will be appurtenances including regulation valves, meters to record water

*
Number has been updated since the publication of the IRRP Feasibility Report. 33 Hemet/San Jacinto Groundwater Management Area
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flow, telemetry-based flow control systems, and discharge piping into the recharge basins.

9. Design and Construction of Monitoring Wells - Three monitoring wells will be constructed outside the river bed along the west berm. The wells are designed to monitor the vertical and lateral migration of recharge water into the underlying aquifer zones. These clustered wells will be multi-cased and perforated to monitor the groundwater levels at various depths.

The overall project size may change as a result of negotiations with regulatory agencies.

3.2.3 IMPLEMENT GROUNDWATER REPLENISHMENT PROGRAM
The groundwater aquifers in the Management Area are a valuable resource and provide many advantages to operating a reliable water supply system. For many Private Water Producers, groundwater is their sole source of water. Declining water levels increase costs for pumping water and can also cause wells to go dry, requiring deeper drilling, or can result in the intrusion of poor quality groundwater from neighboring Management Zones, rendering the groundwater unsuitable for many beneficial uses. Also, the replenishment of high quality imported water from the State Water Project or high quality runoff from the surrounding mountains can maintain or improve the quality of the groundwater in the Management Area.

Groundwater replenishment, therefore, is a major part of the water management strategies considered by the stakeholders. Replenishment efforts to increase water supply in the Management Area can be grouped into two categories:

1. Direct replenishment of groundwater to store water for future use; and

2. Augmentation of imported or recycled water supplies to provide immediate increases in water supply and the associated decrease in groundwater pumping.

Often, these categories are combined, with increases in imported or recycled water being used to replenish groundwater for future use.

3.2.3.1 Enhancing Natural Replenishment
The Management Area already receives a significant amount of natural recharge, from sources such as direct recharge from precipitation and infiltration from the San Jacinto River and its tributaries. While much of this water is able to infiltrate naturally, natural recharge could be increased by capturing surface flows during storm events, allowing the water to infiltrate over time rather than be swept out of the Management Area. As part of the Basin Assessment Study, the TC has identified and considered several conjunctive use and natural replenishment projects that have the potential to address such a water supply management strategy. These are described in Section 5.3 of the Plan.
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3.2.3.2 Additional MWD Replenishment Water
Utilizing replenishment allows for significant cost savings when purchasing imported water from MWD. MWD provides special rates for water used for replenishment purposes. This water is available during the low-demand winter period and currently costs $238/AF for untreated water, while full-service Tier 1 & 2 untreated water currently costs $331/AF and $427/AF, respectively.

3.2.4 EXPAND THE USE OF RECYCLED WATER
Recycled water is available from EMWD’s San Jacinto Valley Regional Water Reclamation Facility. Currently, recycled water is used by agricultural users and other large-scale outdoor irrigators such as golf courses and municipal facilities in place of groundwater. The Watermaster will use recycled water as a significant part of its water supply strategy for replenishment of the groundwater basin. The Watermaster will work with EMWD to determine the operational constraints currently facing the availability of recycled water for replenishment of the basin. The recycled water is to follow the State and Federal guidelines. Future phases of the Plan include upgrade of the San Jacinto Valley Regional Water Reclamation Facility to tertiary treatment.

3.2.4.1 Continue and Expand the In-Lieu Replenishment with Recycled and/or Imported Water
In-lieu replenishment with recycled and/or imported water provides many benefits over direct replenishment of the groundwater. In-lieu involves utilizing an alternate source, in this case imported or recycled water, instead of pumping groundwater. Using in-lieu recharge means that there is no cost to pump groundwater, no land is needed for a spreading basin, and there is no constant recharge through a basin to push salts out of the unsaturated zone. Disadvantages include timing of the supplies with demand; that is, most in-lieu customers cannot use the quantity of water available during the off-peak time. To maximize use of water available for inlieu replenishment, significant infrastructure will be needed to serve the maximum number of customers. This strategy would require the Watermaster to work with EMWD, other agencies, and Private Water Producers to develop specific plans for expanding the use of recycled water for in-lieu replenishment of the basin.
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3.2.4.2 Expand and Upgrade the San Jacinto Valley Regional Water Reclamation Facility
The San Jacinto Valley Regional Water Reclamation Facility is currently an 11 MGD plant with capability to treat wastewater to a secondary level of treatment. While this plant is scheduled for upgrade to tertiary treatment, the recycled water discharge beyond the sale to the agricultural customers is currently being disposed of in the basin. The plant is scheduled for expansion in size and upgrade of the treatment level, and the upgraded plant will have the capacity to treat 14 MGD by 2011 and 18 MGD by 2024. The Watermaster shall have the right of first refusal to purchase all recycled water produced from the treatment facilities serving the Management Area that is not subject to then existing contracts. The Watermaster will analyze the need and decide on the amount of recycled water for direct recharge and/or direct delivery.

3.2.5 PROVIDE FOR RELIABLE WATER SUPPLY TO MEET THE FUTURE DEMAND The Plan is to provide sufficient water supplies to meet future water demands in the Management Area. This strategy is tied directly to the IRRP that is designed to provide 15,000 AFY of additional supplies to meet the projected water demands. As part of this strategy, additional conjunctive use projects, identified in Section 5.3 of this Plan, will augment Phase II of the IRRP. These projects are mostly designed to capture winter run-off for recharge, unlike the IRRP that is designed to recharge imported water.

3.2.6 IMPLEMENT ADDITIONAL WATER CONSERVATION MEASURES
The current level of water conservation has significantly helped to reduce the water demand in the Management Area. In addition to the conservation measures implemented by the Public Agencies, additional conservation measures can be designed and implemented by the agricultural and dairy water users. The Watermaster, in coordination with the Agencies, should develop specific strategies for additional water conservation. In addition, they should identify practical steps and means for voluntary implementation by the agricultural and dairy water users that would help water management of the basin.

3.2.7 IMPLEMENT AND EXPAND MONITORING PROGRAM
At the heart of any water management plan is a robust monitoring program capable of assessing the status of the basin and monitoring the responses to future management actions.

EMWD, on a voluntary basis, has compiled historical groundwater elevation and quality data from mid-1950s through the present. In the early data collection efforts, the location and 36 Hemet/San Jacinto Groundwater Management Area
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frequency of monitoring were not as consistent as the more recent measurements. This was mostly due to the voluntary nature of participation in the monitoring program, as well as funding availability. This lack of consistency in data collection hampers rigorous and thorough analysis. However, long-term hydrographs as well as contours of groundwater levels have been produced by EMWD to present long-term trends in groundwater conditions over time, and with appropriate geographic extent.

In 2004, the Hemet/San Jacinto Groundwater Monitoring Program was initiated to collect, compile, and analyze groundwater-related data. This program was undertaken by the Public Agencies and DWR. The monitoring program provides the information necessary for a comprehensive view of the Management Area, and contains the following elements:
 Groundwater Level Monitoring;
 Groundwater Quality Monitoring;
 Groundwater Extraction Monitoring; and
 Inactive Well Capping and Sealing.

Finally, the monitoring program utilizes EMWD’s RWRD, for assembling and assessing groundwater-related data in the Management Area. All Public Agencies provide data on their wells and assist in communicating with private well owners in their respective jurisdictions to collect their data and information.

This strategy reconfirms that the monitoring program, as established in 2004, should continue and be expanded to new areas. The Stipulated Judgment requires that the Watermaster implement a monitoring program to ensure that Plan activities follow best management and engineering principles to protect Management Area water resources, and to compile and analyze data on groundwater production, water levels, water quality, and groundwater in storage. The Watermaster, in coordination with EMWD and other Public Agencies, will develop plans for expansion of the monitoring program, as well as, specific actions for implementation of the monitoring program in the Management Area. Funding for the monitoring program will come from the Administrative Assessment, as detailed in Section 10.3.1.

3.2.7.1 Groundwater Monitoring
Groundwater level and quality monitoring are valuable, but can be costly and time consuming.

A robust network of monitoring wells can be established to develop the optimum amount of data on groundwater. Some criteria to be used in the development or modification of the network may include:
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 Monitor the same well for selected seasons over many years to understand trends and variability;
 Develop an unbiased distribution of monitoring wells, aerially and vertically, that account for differences in:
 Topography,
 Geology and soils,
 Climate, and
 Land Use;
 Maintain supporting data to aid in analysis, including:
 Meteorological data,
 Hydrologic data, and
 Land use data, including pumping and irrigation;
 Monitor at a frequency that captures variability of water level and water quality fluctuations;
 Utilize wells, to the extent possible, intended solely for groundwater monitoring, not production; and
 Maintain high levels of data quality.

The Watermaster is to work cooperatively with the Public Agencies and Private Water Producers to establish an optimum network of monitoring wells for collection and analysis of groundwater trends and variability.

3.2.7.2 Surface Water Monitoring
Surface water monitoring would build on the existing cooperative program between EMWD and the United States Geological Survey (USGS). This program monitors streamflow on the San Jacinto River just upstream of State Street and on Lamb Canyon Creek near Victory Ranch. The USGS also monitors a gage on the San Jacinto River at the Cranston Ranger Station. Continued and additional surface water flow and quality monitoring would include the following criteria:
 Monitor the same location for many years to understand trends and variability;  Maintain supporting data to aid in analysis, including:
 Meteorological data,
 Groundwater data, and
 Land use data, including pumping and irrigation; and
 Maintain high levels of data quality.

Gaging station should be installed on reaches not currently being monitored, such as:
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 San Jacinto River near Main Street;
 San Jacinto River near Highway 74 bridge crossing;
 Bautista Creek near Highway 74 bridge crossing; and
 Salt Creek near State Street.

The Watermaster is to work cooperatively with the Public Agencies to establish specific monitoring locations for collection and analysis of surface water trends and variability. 39 Hemet/San Jacinto Groundwater Management Area
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SECTION 4 STATE OF THE MANAGEMENT AREA
This section discusses the local geologic and hydrologic conditions that provide the foundation for the development of the Plan. The ability to manage available water supplies is to a large degree governed by naturally occurring conditions and the physical environment. This section further describes water supply conditions and sources; historical and current water demands; status of the groundwater basin; and summarizes water quality conditions.

4.1 GEOGRAPHY AND CLIMATE

4.1.1 GEOGRAPHY
The Management Area is located in western Riverside County, approximately 70 miles southeast of the City of Los Angeles. The area encompasses the Cities of Hemet and San Jacinto; unincorporated residential/commercial areas, including Valle Vista; and agricultural lands. State Highway 74 (Florida Avenue) crosses the valley in an east-west direction and State Highway 79 provides a north-south corridor for the region. The San Jacinto mountain range, to the east of the valley, is the dominant geographic feature of the region, rising to a height of 10,805 feet at Mount San Jacinto. Elevations on the valley floor range from approximately 1,400 to 1,800 feet. There are various bedrock outcrops in the area, none of which exceed 2,700 feet.

The San Jacinto Watershed (Figure 4.1) includes the Management Area and surrounding mountains and covers an area of approximately 728 square miles, measured above a point just downstream from Railroad Canyon Dam. All of the streams and rivers in the watershed are ephemeral, flowing only when precipitation occurs and losing much of this flow to groundwater infiltration. The San Jacinto River arises in and drains the western slopes of the San Jacinto Mountains. Waterways tributary to the river include the North and South Forks and Strawberry, Indian, Poppet, and Bautista Creeks. Lake Hemet, located in the mountains on the South Fork of the San Jacinto River, is a 12,775 AF capacity LHMWD-operated reservoir completed in 1895. The San Jacinto River recharges the groundwater basin, primarily in the area southeast of the City of San Jacinto. It then occasionally flows northwest past the Lakeview Mountains, filling Mystic Lake, before turning southwest to flow across the Perris Valley floor.

The San Jacinto River ultimately flows into Lake Elsinore via Railroad Canyon and Canyon Lake. Lake Elsinore, when full, overflows into Temescal Wash, which joins the Santa Ana River near Prado Dam.
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Figure 4.1
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State of the Management Area

4.1.2 CLIMATE
The climate of the area is that of a dry, semi-arid, near-Mediterranean zone, typical of the moderately elevated inland valleys of southern California. The climate is characterized by wet and dry seasons, generally low precipitation, and a large proportion of clear days, moderately high summer temperatures, and mild winter temperatures. The yearly average temperature at the City of San Jacinto is 62°F (25°C). Summer temperatures are often more than 100°F (38°C), and the recorded maximum at San Jacinto is 120°F (49°C). Frost occasionally occurs during the December through February period. The lowest recorded temperature was 7°F (-14°C). The average frost-free period is 247 days long, from March 15 to November 19. These temperatures for the San Jacinto climate station are considered to be generally representative of temperatures throughout the valley area.

Along with the rest of Southern California, the area is subject to the annual Santa Ana winds.

Usually occurring in the fall of the year, these winds blow from the northeast, bringing hot, dry desert air with velocities of up to 50 miles per hour. Relative humidity has at times dropped below 5 percent with temperatures of 105°F (40°C) and higher. This phenomenon normally lasts only a few days, but has been known to last for several weeks, thereby greatly increasing the evaporation rate.

As a result of the hot, dry climate, the area has a high rate of evapotranspiration.

Evapotranspiration is recorded as reference evapotranspiration (ETo; evapotranspiration from a standardized grass surface) by the DWR’s California Irrigation Management Information System. Reference evapotranspiration averages 57 inches per year and is highly seasonal, with an average monthly maximum of 7.9 inches in July and average monthly minimum of 2.0 inches in December (DWR CIMIS, 2006).

Virtually all precipitation falls in the winter months, with some summer thunderstorms.

Topography generally controls the relative amounts of precipitation from one location to the next. The average precipitation on the valley floor is about 13 inches, but near Mt. San Jacinto, the average precipitation is approximately 40 inches. Figure 4.2 shows the distribution of precipitation in the watershed.

The Riverside County Flood Control and Water Conservation District (RCFC&WCD) currently maintains precipitation records from the National Weather Service precipitation gauge at the California Division of Forestry Station at 1st Street and San Jacinto Avenue in San Jacinto (Site #186). Annual San Jacinto precipitation totals for the 1850/51 through 2004/05 rain years (July – June) are shown in Figure 4.3. For the 155 years from July 1850 through June 2005, average precipitation equaled 13.12 inches; median precipitation was 12.13 inches; the year with 43 Hemet/San Jacinto Groundwater Management Area
Water Management Plan

14.B.

!
! !
!
Perris
Lake Elsinore
Hemet
San Jacinto

LAKE MATTHEWS
LAKE

ELSINORE
LAKE
PERRIS

LAKE SKINNER
LAKE
HEMET
!11
!15
!14
!18
!16
!13
!12
!20 !22
!24
!26 !28
!30 !32
!34 !36
!38
Legend
Equal Precipitation (in)*
Management Area
Lakes and Reservoirs
Major Watercourses
! Cities
October 2007
Hemet / San Jacinto Water Management Plan
Average Annual Precipitation
Figure 4.2
0 2 4
Miles
±
*Source DWR, 1978
(1932 - 1964 data)
San Jacinto River

14.B.

Figure 4.3 Annual Precipitation and Cumulative Departure from Mean Precipitation -30-20-10
0 1020304050
1850 1860 1870 1880 1890 1900 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000 Date
Precipitation (inches)
-30-20-1001020304050
Cumulative Departure from Mean Precipitation (inches)
Annual Precipitation Mean Precipitation Cumulative Departure from Mean Precipitation Mean Precipitation = 13.1"

14.B.

State of the Management Area
the highest precipitation was 1883/84 with 35.77 inches of rain; and the driest year was 2001/02 with 3.85 inches. Figure 4.3 also shows the cumulative departure from mean precipitation. This chart represents wet periods with increasing values, such as 1882-1890 and 1990-1998; normal periods with near-constant values, such as 1859-1881 and 1980-1988; and dry periods as decreasing values, such as 1944-1976 and 1999-2004.

4.2 SURFACE WATER CONDITIONS
The San Jacinto River and its tributaries are the primary surface water elements in the Management Area. This river and its tributaries provide water for direct use, artificial recharge, as well as for significant natural recharge to the groundwater system through the riverbeds.

The San Jacinto River contains high quality water that flows from the mountain watershed and recharges groundwater. The river is a losing stream throughout the Management Area.

Artificial and natural recharge of San Jacinto River water improves the overall quality and quantity of groundwater. Groundwater levels have been lowered over the years to the point where additional changes in groundwater levels has little or no impact on surface flows or vice versa, although in predevelopment conditions groundwater contributed to surface flows in swampy areas of the basin floor, particularly upgradient of faults.

EMWD and RCFC&WCD have partnered with USGS to monitor stream flows. USGS gaging stations along the San Jacinto River and its tributaries in the Hemet/San Jacinto and surrounding area are listed in Table 4.1, below.

In 1996, EMWD entered into a Cooperative Water Program Joint Funding Agreement with the USGS for a long-term water budget study in the San Jacinto area. As part of this project, the USGS installed two stream flow gages and three stage gages in the San Jacinto Watershed.

The USGS applied a rainfall-runoff model to estimate the water budgets for groundwater and surface water flows and to determine the hydrological effects of urbanization. The study used historical precipitation data with the model to produce a simulated long-term record of groundwater recharge and surface water runoff for a variety of potential urbanized conditions.

The major objectives of the study were to:

1. Estimate groundwater recharge and surface water flows in the Canyon and Upper Pressure Management Zones;

2. Summarize the long-term water budget of the study area upstream of Mystic Lake; and

3. Determine the effects of urbanization in the study area. 46 Hemet/San Jacinto Groundwater Management Area
Water Management Plan

14.B.

State of the Management Area
Table 4.1 USGS Surface Water Gaging Stations
Station
No. Description: Lat.; Long.* Data Type Time Frame
11069200 Lake Hemet WC up Canyon near San
Jacinto
33°44'20";
116°49'30" Daily flows 1961-1991
11069300 WF San Jacinto Tributary near Valle Vista 33°43'20"; 116°48'00"
Peak flows
Daily flows
1962-1973
1961-1967
11069500 San Jacinto River near San Jacinto
(Cranston Ranger Station)
33°44'17";
11649'59"
Real time
Peak flows
Daily flows
Water Qual.
1921-present
1920-present
1998
11069501 San Jacinto River near San Jacinto plus
Canals
33°44'17";
116°49'59" Daily flows 1948-1990
11070000 Bautista Creek Near Hemet 33°41'40";
116°51'00"
Peak flows
Daily flows
1947-1969
1947-1969
11070020 Bautista Creek at head of Flood Channel in
Hemet
33°42'42";
116°52'04"
Peak flows
Daily flows
1988-2003
1987-present
11070050 Bautista Creek at Valle Vista 33°44'04";
116°53'33"
Peak flows
Daily flows
1970-1987
1969-1987
11070150 San Jacinto River above State Street near
San Jacinto
33°49'17";
116°58'21"
Peak flows
Daily flows
1997-present
1996-present
11070158 Line D Storm Drain at Santa Fe St. near
San Jacinto
33°46'44";
116°57'46" Peak flows 1997-1999
11070160 Line E Storm Drain at Santa Fe St. near San
Jacinto
33°46'41':
116°58'18" Peak flows 1997-1999
11070185 Lamb Canyon at Victory Ranch near San
Jacinto
33°51'31";
117°00'53" Peak flows 1997-2004
11070190 Laborde Canyon near San Jacinto 33°51'44";
117°01'29" Peak flows 1962-1973
11070210 San Jacinto River at Ramona Expressway
near Lakeview
33°50'23";
117°08'06"
Real time
Peak flows
Daily flows
2001-present
2000-present
* The longitude and latitude measurements are published figures, but were estimated by the USGS from maps and, therefore, only have an accuracy of +/- 500 feet.

Five gages were installed upstream of Bridge Street in the San Jacinto basin area. Two stream flow gages were installed in the San Jacinto River, one at the State Street (Highway 79) crossing and the other at the Cranston Ranger Station. Three crest stage gages were installed in Potrero Canyon near San Jacinto, Lamb Canyon near San Jacinto, and at an urban runoff site.

Groundwater recharge in the Canyon and Upper Pressure Management Zones was calculated in addition to the surface runoff leaving the Management Area (including urban runoff) that reaches the Mystic Lake area. The study results are summarized in the USGS Water Resources Investigations Report 02-4090, Rainfall-Runoff Characteristics and Effects of Increased Urban Density on Streamflow and Infiltration in the Eastern Part of the San Jacinto River Basin, Riverside County, 47 Hemet/San Jacinto Groundwater Management Area
Water Management Plan

14.B.

State of the Management Area
California. The report includes all measured, simulated, and statistical data used to support the conclusions of the study.

After the end of the study, some of the crest stage gages were no longer monitored and fell into disrepair. However, EMWD continues to fund, and USGS continues to operate, the stream gage on the San Jacinto River at State Street. The crest stage gage at Lamb Canyon Creek at Victory Ranch is still jointly funded by EMWD and USGS. For the 2005/2006 monitoring, the effort was funded as part of the Hemet/San Jacinto Monitoring Program by EMWD, LHMWD, and the Cities of Hemet and San Jacinto. The stream gage on the San Jacinto River at Cranston Ranger Station is currently funded and maintained by USGS and Riverside County Flood Control District with real-time data available on the USGS website.

4.3 GEOLOGY
The geology of the Hemet/San Jacinto area, relevant to groundwater supplies, has two primary features: a sediment filled graben, and the San Jacinto fault zone. The sediments in the graben provide for the majority of storage and movement of groundwater in the area and the movement of water is altered by the presence of the faults, which provide most of the internal boundaries for the area’s Management Zones.

The Management Area partially contains a geomorphic feature known as a graben or faultgraben, along with additional permeable materials in alluvium-filled valleys. A graben is a depressed, trough-like structure in the Earth's crust, filled or partially filled with sediments, and usually formed by faulting and the relative downward movement of block-like geologic structures. The San Jacinto graben is a deep, sediment-filled structure approximately 2.5 miles wide and more than 20 miles long and forms the Upper Pressure Management Zone’s boundaries in the Management Area. The Management Area, including the graben, is nearly surrounded by impermeable bedrock mountains and hills. Internally, island-like masses of granite and metamorphic bedrock or older alluvium rise above the valley floor. Surface and near-surface sediments in the graben and alluvium filled valleys are primarily sand and sandy silt with some silt and silty clay. The San Jacinto graben consists of a forebay area in the southeast where surface water recharge primarily occurs and a pressure area in the northwest where deep aquifers exist under confined conditions. The northwest-southeast oriented graben is formed by the right-slipping San Jacinto fault zone, believed to be the most seismically active in southern California. Between 1899 and the present, seven earthquakes of Richter magnitude

6.0 or greater have occurred along the San Jacinto fault between the San Gabriel Mountains and Mexico. This complex zone of faulting and cross faulting has two main branches, the Claremont and the Casa Loma, which form the northeast and southwest borders of the graben, respectively (see Figure 4.4).
48 Hemet/San Jacinto Groundwater Management Area
Water Management Plan

14.B.

!
!
San Jacinto River
Diamond Valley Lake
Claremont Fault
Casa Loma Fault
Park Hill Fault
Bautista Creek Fault
S A N

J A C I N T O

F A U L T Z O N E
Lake Skinner
Hemet
San Jacinto
·|}þ79
·2|}þ43
·|}þ74
·|}þ79
Legend
Faults*
! Cities
Major Watercourses
Lakes and Reservoirs
Major Roads
Management Area
October 2007
Hemet / San Jacinto Water Management Plan
Fault Locations
Figure 4.4
0 0.5 1
Miles
±
*Source: Riverside County Page 346 of 1949

14.B.

State of the Management Area
The Claremont fault separates the graben from the Badlands and the San Jacinto Mountains on the northeast. This fault follows Gilman Springs Road from State Highway 60 to the City of San Jacinto, hugging the foothills. It then follows the San Jacinto River before shifting to Bautista Creek south of Valle Vista. To the west, the Casa Loma fault generally parallels the Claremont Fault. The Casa Loma portion of the San Jacinto fault zone forms the southwesterly border of the graben. It runs from Park Hill (also known as Casa Loma) to the northwest toward Reche Canyon. The Bautista Creek fault is an extension of the Casa Loma fault, but is separately named due to differences in fault movement (DWR, 1969). The Bautista Creek fault runs from Bautista Canyon through the intersection of Menlo and San Jacinto Streets, joining the Casa Loma fault on the western side of Park Hill.

The portions of the Management Area outside the graben, to the east of the Claremont Fault and to the west of the Casa Loma and Bautista Creek faults, are sediment filled basins. These sediments are similar in nature to those in the graben, but are much thinner.

The faulting in the Management Area plays an important role in the movement of groundwater and is therefore a key factor in the delineation of Management Zones.

4.4 DELINEATION OF MANAGEMENT ZONES
Groundwater Management Zones (Figure 2.1) were delineated by the RWQCB based on major impermeable boundaries (such as bedrock or faults), flow systems that prevent widespread mixing even without a physical barrier, and water quality. Groundwater flow, whether or not determined by a physical barrier, was the primary characteristic used to define the Management Zones. Water quality data were used to support understanding of the flow regime and to assure that unusually high quality or poor quality waters were distinguished for regulatory purposes. (RWQCB, Resolution No. R8-2004-0001).

The four Management Zones within the Hemet/San Jacinto Management Area are:

1. Canyon;

2. San Jacinto Upper Pressure (Upper Pressure);

3. The Hemet North portion of Lakeview/Hemet North (Hemet North); and

4. Hemet South.

The Canyon Management Zone lies along a northwest to southeast axis in the eastern part of the Management Area. The boundaries of the Canyon Management Zone include the virtually impermeable San Jacinto Mountains to the east and Claremont Fault to the west. The Claremont Fault inhibits flow between Canyon and Upper Pressure Management Zones (DWR, 1969; DWR, 1978; SWRB, 1955).
50 Hemet/San Jacinto Groundwater Management Area
Water Management Plan

14.B.

State of the Management Area
Like the Canyon Management Zone, the Upper Pressure Management Zone lies along a northwest to southeast axis in the eastern part of the Management Area. The Upper Pressure Management Zone is bounded by the Claremont Fault to the northeast, the Casa Loma and Bautista Creek Faults to the southwest, and the flow system boundary with the San Jacinto Lower Pressure Management Zone to the northwest.

Boundaries of the Hemet North Management Zone include the Casa Loma Fault to the east; the groundwater divide near Esplanade Avenue to the south; the impermeable bedrock of the Lakeview Mountains to the west; and a constricted area of permeable materials between the Lakeview Mountains and the Casa Loma Fault to the northwest. The Casa Loma fault zone is a known barrier to groundwater flow (DWR, 1969; DWR, 1978; SWRB, 1955).

The Hemet South Management Zone boundaries include the Casa Loma and Bautista Creek faults to the east; the groundwater divide near Esplanade Avenue to the north; the groundwater divide in the Winchester area and various crystalline bedrock outcrops to the west. Diamond Valley Lake, a water supply reservoir for the MWD completed in 1999 and filled by 2002, is located southwest of the Hemet South Management Zone. MWD (1991) states that seepage through the permeable materials in the upper 200 feet may take place. The Casa Loma and Bautista Creek faults are known barriers to groundwater (DWR, 1969; DWR, 1978; SWRB, 1955).

For the Management Area as a whole, the mountains (Figure 4.1) form a nearly impermeable boundary such that there are only three pathways for groundwater to migrate to or from other Management Zones outside the Management Area. These locations are:
 Between the Hemet South and Perris South Management Zones, in the southwest;
 Between the Hemet North portion and Lakeview portion of Lakeview/Hemet North Management Zones, in the northwest; and
 Between the Upper Pressure and Lower Pressure Management Zones, in the northwest.

Groundwater flow in and out of the Management Area is important, as water quality is typically better in the Management Area than in the surrounding areas.

4.5 SOILS
The influence of soils on water use and hydrologic processes makes it an important component to consider when estimating changes in water use due to land use change as well as for siting spreading basins for artificial recharge projects.
51 Hemet/San Jacinto Groundwater Management Area
Water Management Plan

14.B.

State of the Management Area
The predominant soils, as defined in the USDA’s soil survey (USDA, 1971) at the series level, in the Management Area are shown in Figure 4.5 and are listed below:
 Dello,
 Grangeville,
 Greenfield,
 Metz,
 San Emigdio, and
 Traver.

The remaining soils are classified as “Other” in Figure 4.5 and consist of Chino, Domino, Exeter, Hanford, Pachappa, Ramona, Riverwash, as well as other soil series occurring in less than one square mile of the Management Area.

An important soil classification used by the USDA for hydrology is the hydrologic soils group.

The hydrologic soils group can be used to estimate the amount of infiltration that can be expected from a certain soil. This grouping is based on estimates of the intake of water during the latter part of a storm of long duration, after the soil profile is wet and has an opportunity to swell, without the protective effect of any vegetation. Also considered are depths to the seasonal high water table and to a low permeability layer. The classification is useful at a planning level, but detailed studies are required for a thorough understanding of the infiltration capacity of soils. Features such as slope, ground cover, or low permeability materials away from the upper soil profile may impact the soil’s capability to infiltrate water.

Under the hydrologic soils group classification system, soils are grouped A to D with “A” having the lowest runoff potential (highest infiltration rates) and “D” having the highest runoff potential (lowest infiltration rates). A map of hydrologic soils groups is provided as Figure 4.6 (USDA-SCS, 1971) and a corresponding table of hydrologic soil groups and soil series is provided in Table 4.2. As can be seen on Figure 4.6, most of the Management Area is classified as “B”, soils with a moderate infiltration rate. Of the Management area, nearly 80% are “B” soils, 10% are “A” soils, and the remainder are either “C”, “D”, or are deemed too variable to be classified. The “A” soils are generally located along the San Jacinto River and Bautista Creek; much of the “variable” soils along these watercourses also have the potential for very high infiltration rates.
52 Hemet/San Jacinto Groundwater Management Area
Water Management Plan

14.B.

!
!
San Jacinto River
Diamond Valley Lake
Lake Skinner
Hemet
San Jacinto
·|}þ79
·2|}þ43
·|}þ74
·|}þ79
Legend
Soil Series*
Dello
Grangeville
Greenfield
Metz
San Emigdio
Traver
Other
! Cities
Major Watercourses
Lakes and Reservoirs
Major Roads
Management Area
October 2007
Hemet / San Jacinto Water Management Plan
Soil Series
Figure 4.5
0 0.5 1
Miles
±
*Source: USDA, 1971

14.B.

!
!
San Jacinto River
Diamond Valley Lake
Lake Skinner
Hemet
San Jacinto
·|}þ79
·2|}þ43
·|}þ74
·|}þ79
Legend
Hydrologic Soils Group*
Group A - High Infiltration Rate
Group B - Moderate Inflitration Rate
Group C - Slow Infiltration Rate
Group D - Very Slow Infiltration Rate
Variable
! Cities
Major Watercourses
Lakes and Reservoirs
Major Roads
Management Area
October 2007
Hemet / San Jacinto Water Management Plan
Hydrologic Soils Groups
Figure 4.6
0 0.5 1
Miles
±
*Source: USDA, 1971

14.B.

State of the Management Area
Table 4.2 Hydrologic Soils Groups
Common Soil Series Hydrologic Soils
Group Minor Soil Series Hydrologic Soils Group
Dello A-C Chino B-C
Grangeville B-C Domino C
Greenfield B Exeter C
Metz A Hanford B
San Emigdio B Pachappa B
Traver B-C Ramona B-C
Riverwash variable
Other variable

4.6 GROUNDWATER CONDITIONS
As previously stated, groundwater flow between Management Zones is inhibited by geologic faults, (Figure 4.4) notably the Casa Loma Fault, Bautista Creek Fault and Claremont Fault, all strands of the San Jacinto fault zone. The Claremont Fault acts as a barrier to flow between Canyon and Upper Pressure Management Zones, while the Casa Loma Fault is a barrier to flow between the Upper Pressure Management Zone and both the Hemet North and Hemet South Management Zones.

The San Jacinto River enters the basin in the southeast part of the Management Area and flows north and west across the Upper Pressure Management Zone. In most years, all river flow is lost to percolation and limited evapotranspiration in the Canyon and Upper Pressure Management Zones. Recharge from the San Jacinto River and its tributaries forms a large portion of total inflow for the Canyon and Upper Pressure Management Zones.

Groundwater pumping for irrigation and domestic purposes is the principal source of groundwater outflow. Major pumping depressions occur in the Hemet South and Upper Pressure Management Zones.

Historically, extraction in excess of recharge has resulted in lowered groundwater levels and altered directions of groundwater flow.

4.6.1 ARTIFICIAL RECHARGE OPERATIONS
In addition to natural inflows and return flows from agricultural and municipal uses, there has been and continues to be artificial recharge operations in the Management Area. These 55 Hemet/San Jacinto Groundwater Management Area
Water Management Plan

14.B.

State of the Management Area
operations use imported water, when available, typically at lower winter rates, to artificially recharge groundwater through spreading basins. The annual volume of imported water recharged is presented in Figure 4.7. Recharge operations did not begin until 1990. More recently, the Public Agencies have signed memoranda of understanding in 2004 and 2005 to plan for the recharge at two existing recharge facilities in the San Jacinto riverbed. 0 3000
6000
9000
19841986198819901992199419961998200020022004
Year
Imported Water Recharged
(AFY)
Figure 4.7 Annual Imported Water Recharged
The artificial recharge operations help address the impact of overdraft caused by past groundwater production.

4.6.2 GROUNDWATER LEVELS AND FLOW
Historical groundwater extraction from the Management Area has resulted in a significant drop in groundwater levels. The lowered groundwater levels also changed the direction of flow in parts of the Management Area. Figure 4.8 shows the flow directions in the early 20th Century.

Figure 4.9 shows current flow directions. Notable changes over time include the development of a groundwater divide between the Hemet South and Perris South Management Zones (previously flow was out of the Hemet South Management Zone into the Perris South Management Zone and flow from the Hemet North portion to the Lakeview portion of the Lakeview/Hemet North Management Zone due to lower water levels in the Lakeview portion. (TechLink, 2002a)
56 Hemet/San Jacinto Groundwater Management Area
Water Management Plan

14.B.

!
!
San Jacinto River
Diamond Valley Lake
Claremont Fau
Ca
lt
sa Loma Fault
Park Hill Fault
Bautista Creek Fault
Lake Skinner
Hemet
San Jacinto
·|}þ79
·2|}þ43
·|}þ74
·|}þ79
Legend
Faults*
! Cities
Major Watercourses
Lakes and Reservoirs
Major Roads
Management Area
October 2007
Hemet / San Jacinto Water Management Plan
Early 20th Century Groundwater Flow Direction
Figure 4.8
0 0.5 1
Miles
±
*Source: Riverside County
Generalized Groundwater Flow Direction
based on Techlink, 2002 & EMWD, 2005

14.B.

!
!
San Jacinto River
Diamond Valley Lake
Claremont Fault
Casa Loma Fault
Park Hill Fault
Bautista Creek Fault
Lake Skinner
Hemet
San Jacinto
·|}þ79
·2|}þ43
·|}þ74
·|}þ79
Legend
Faults*
! Cities
Major Watercourses
Lakes and Reservoirs
Major Roads
Management Area
October 2007
Hemet / San Jacinto Water Management Plan
Current Groundwater Flow Direction
Figure 4.9
0 0.5 1
Miles
±
*Source: Riverside County
Generalized Groundwater Flow Direction
based on Techlink, 2002 & EMWD, 2005

14.B.

State of the Management Area
Figure 4.10 shows Spring 2004 groundwater levels. The groundwater level contours show pumping depressions in the northeastern part of the Hemet South Management Zone and in the northwestern part of the Upper Pressure Management Zone. These pumping depressions are due to concentrated pumping in those areas in excess of the local recharge capacity.

Historical groundwater levels are affected by both climatic conditions, which impact the amount of recharge, and pumping. Historical conditions in the four Management Zones can be studied in relation to their unique setting by analyzing observed water levels at representative wells with long periods of record. Hydrographs for four selected wells are presented in the following sections. The locations of the wells can be found on Figure 4.11.

4.6.2.1 Canyon Management Zone
The Canyon Management Zone benefits from significant surface water recharge from the San Jacinto River and its tributaries. This additional recharge reduces the impact of the pumping occurring in the Canyon Management Zone. Figure 4.12 shows groundwater levels from 1948 to 2005 for EMWD’s #6 Cienega well. This figure shows the impact of hydrologic variability and pumping in the area. One drought period in the late 1980s resulted in groundwater levels dropping by over 100 feet. Such declines in groundwater levels are likely due to a combination of reduced precipitation, reduced recharge from streamflow, and the effects of pumping. Most of this decline was recovered in the wet period that followed from 1991 to 1993.

Changes are also seen seasonally, with groundwater levels changing by as much as 100 feet from late fall to late spring. These seasonal changes in water levels are also due to a combination of reduced precipitation, reduced recharge from streamflow, and the effects of pumping.

4.6.2.2 Upper Pressure Management Zone
The Upper Pressure Management Zone benefits from surface water recharge from the San Jacinto River and its tributaries and supplies most of the groundwater for the Management Area. However, even with significant recharge from surface water as well as other inflows, wells in the Upper Pressure Management Zone have shown a decline in water levels over time.

Figure 4.13 presents water level elevations for EMWD’s #9 Hewitt and Evans well, showing a consistent decline through the dry period of the 1950s, 1960s, and 1970s with a drop of more than 200 feet over the 30-year period. The hydrologically wet and normal periods during 1978 to 1986 resulted in a recovery of about half the decline from the previous three decades. Since 1986, groundwater levels have dropped approximately 200 feet. The changes seen in the well 59 Hemet/San Jacinto Groundwater Management Area
Water Management Plan

14.B.

!
!
San Jacinto River
Diamond Valley Lake
Lake Skinner
Hemet
San Jacinto
·|}þ79
·2|}þ43
·|}þ74
·|}þ79
1340
1360
1420
1380
1540
1300
1400
1520
1660
1260
1220
1500
1280
1200
1640
1560
1180
1380
1420
1240
1200
1340
1280
1220
1160
1180
1320
1360
1420
1640
1500
1300
1800
1440
1260
1840
1700
1760
1340
1320
1280
1280
1240
Legend
Faults*
Groundwater Level Contours (ft)**
! Cities
Major Watercourses
Lakes and Reservoirs
Major Roads
Management Area
October 2007
Hemet / San Jacinto Water Management Plan
Spring 2004 Groundwater Elevation
Figure 4.10
0 0.5 1
Miles
±
*Source: Riverside County
**Source: EMWD, 2005
*Groundwater Contours Intervals are not consistent due to steep gradients in mountainous areas and shallow gradients in valley areas and/or limited data.

14.B.

!
!
>
>
>
>
San Jacinto River
Diamond Valley Lake
Lake Skinner
EMWD 22 Sneed
EMWD 06 Cienega
EMWD 21 Old Dairyland
EMWD 09
Hewitt & Evans
Hemet
San Jacinto
·|}þ79
·2|}þ43
·|}þ74
·|}þ79
Legend
> Wells Featured in Hydrographs*
! Cities
Major Watercourses
Lakes and Reservoirs
Major Roads
Management Area
October 2007
Hemet / San Jacinto Water Management Plan
Location of Representative Well Hydrographs
Figure 4.11
0 0.5 1
Miles
±
*Source: EMWD

14.B.

Figure

4.12 Groundwater Elevation
Canyon Management Zone, EMWD #6 Cienega
130013501400145015001550160016501700
1948
1950
1952
1954
1956
1958
1960
1962
1964
1966
1968
1970
1972
1974
1976
1978
1980
1982
1984
1986
1988
1990
1992
1994
1996
1998
2000
2002
2004
Date
Groundwater Elevation (ft amsl)

14.B.

Figure

4.13 Groundwater Elevation
Upper Pressure Management Zone, EMWD #9 Hewitt and Evans 115012001250130013501400145015001550
1948
1950
1952
1954
1956
1958
1960
1962
1964
1966
1968
1970
1972
1974
1976
1978
1980
1982
1984
1986
1988
1990
1992
1994
1996
1998
2000
2002
2004
Date
Groundwater Elevation (ft amsl)

14.B.

State of the Management Area
are likely due to a combination of reduced precipitation, reduced recharge from streamflow, and effects of pumping.

4.6.2.3 Hemet North Portion of the Lakeview/Hemet North Management Zone Groundwater levels in Hemet North portion of the Lakeview/Hemet North Management Zone have shown a steady decline followed by recent stabilization. These declines occur even though significantly less water was pumped from the Hemet North portion than from other Management Zones. The Hemet North portion does not receive as much surface water recharge as Upper Pressure and Canyon Management Zones, thus impacts of pumping are more pronounced than they might be in those Management Zones. Figure 4.14 shows groundwater levels at EMWD’s #21 Old Dairyland well. Since the beginning of the record in 1966, groundwater levels have steadily declined, with little variability. After dropping more than 100 feet from the mid-1960s to the mid-1990s, groundwater levels have stabilized at an average of 1,250 feet above mean sea level.

4.6.2.4 Hemet South Management Zone
Groundwater levels in the Hemet South Management Zone have shown a steady decline, although the recent rate of decline has slowed. Figure 4.15 shows groundwater levels at EMWD’s #22 Sneed well since the beginning of the record in 1952. While data is limited for the 1952 to 1990 period, groundwater levels declined through the 1952-1990 period, and the increased data available from 1990 to 2005 shows little variability. Groundwater level declines have slowed but have still dropped approximately 20 feet in the past 10 years.

4.6.3 GROUNDWATER BUDGET
The changes in groundwater levels and flow directions are the result of changes in the balance of inflows and outflows from the Management Area. A groundwater budget can identify potential causes of an imbalance. The groundwater budget presented in Table 4.3 shows average annual values for the components of total inflow and total outflow. The values are based on a water balance spreadsheet tool developed for use by the TC. This Excel-based tool allowed the TC members to investigate the impact of inclusion and exclusion of specific water budget components, such as artificial recharge, imported water, and others, as well as the implications of different data sources, such as the calibrated groundwater model and the database or reported values with underflow estimates. This allowed for a more thorough understanding of the potential impacts of definitions of water budget components on the calculated yield and overdraft. The values presented in Table 4.3, as agreed upon by the TC, are the results of the calibrated groundwater model except for groundwater extraction, which is 64 Hemet/San Jacinto Groundwater Management Area
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14.B.

Figure

4.14 Groundwater Elevation
Hemet North Management Zone, EMWD #21 Old Dairyland
100010501100115012001250130013501400
1948
1950
1952
1954
1956
1958
1960
1962
1964
1966
1968
1970
1972
1974
1976
1978
1980
1982
1984
1986
1988
1990
1992
1994
1996
1998
2000
2002
2004
Date
Groundwater Elevation (ft amsl)

14.B.

Figure

4.15 Groundwater Elevation
Hemet South Management Zone, EMWD #22 Sneed
110011501200125013001350140014501500
1948
1950
1952
1954
1956
1958
1960
1962
1964
1966
1968
1970
1972
1974
1976
1978
1980
1982
1984
1986
1988
1990
1992
1994
1996
1998
2000
2002
2004
Date
Groundwater Elevation (ft amsl)

14.B.

State of the Management Area
obtained from the data tabulated in Assessment of Historical and Projected Land and Water Use Data (WRIME, 2003a).

Table 4.3 Groundwater Budget for the Management Area
(Average Annual Volume for Water Years 1984-2004*)
Inflow Component Volume
(AFY) Outflow Component Volume (AFY)
Recharge from Rainfall 8,900 Groundwater Production 57,800 San Jacinto River and Bautista
Creek Recharge 9,900 Subsurface Outflow from Hemet South to Perris South 300 Recharge from Public Agency
Sales 2,900 Subsurface Outflow from Hemet North to Lakeview 1,500 Recharge from Irrigation 9,600
Conjunctive Use Recharge 800
Reclaimed Water Recharge 1,500
Subsurface Inflow from
Mountain Fronts 8,000
Subsurface Inflow from Lower
Pressure to Upper Pressure 1,700
Total 43,300 Total 59,600
* Values for Groundwater Production represent 1984-2004 averages, an update from the 1984-2003 values presented in WRIME, 2003a. All other data is taken from the 1984-1999 modeling results (TechLink, 2002a).

The total average annual inflow is 43,300 AFY and the total average annual outflow is 59,600 AFY, resulting in an average annual deficit of 16,300 AFY for the 20-year hydrologic period of 1984 to 2004. Nearly all (97%) outflow is from groundwater extraction while inflow is primarily natural recharge, representing 66% of inflow and the remainder a direct result of recharge from applied water or other human activities. The 1984-2004 hydrologic period presented in Table 4.3 represents the period during which the most consistent and continuous data for the Management Area is available. It should be noted, however, that this period does not necessarily represent the long-term groundwater basin conditions, and as described in Section 4.9 of this document, long-term overdraft is estimated based on longer periods, as well as other methods and criteria.

4.6.4 LAND SUBSIDENCE
In additional to water quantity and quality concerns, there is the potential for further land subsidence in the Management Area, although not at rates to cause significant damage. 67 Hemet/San Jacinto Groundwater Management Area
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14.B.

State of the Management Area
Widespread land subsidence has been observed in the San Jacinto basin as the area and its groundwater resources have been developed. Three forms of subsidence have been reported by the U.S. Environmental Protection Agency (Boen, et al., 1971): local or regional tectonic adjustments along the faults in the area; groundwater withdrawals and subsequent artesian head decline; and soil collapse or compaction due to causes other than tectonic or artesian head decline. In the graben, tectonic subsidence has averaged 0.2 in/yr (4.5 mm/year) over the past 40,000 years and subsidence due to groundwater withdrawal and aquifer compaction is 1 - 1.2 in/yr (2.5 - 3 cm/yr) (Morton, 1995). Lofgren (1975, 1976) reported in studies that, through the years, the periods of subsidence tend to correspond to the periods of groundwater production; land surface elevation at the well tends to be lower each year; and subsidence has been greater within the graben than on either side.

4.7 LAND USE
Land use in the Management Area has experienced changes over the past half-century. The conversion from agricultural or undeveloped lands to urban uses has an impact on basin hydrogeology as well as on water demand. Figure 4.16 and Table 4.4 show land uses in 1998 for most of the project area.

Table 4.4 Land Use Distribution Based on the 1998 Survey Land Use Canyon Upper
Pressure
Hemet
South
Hemet
North Total
Total Area (acres) 4,400 21,200 25,300 5,600 56,500
% Urban and Suburban 24% 24% 36% 11% 28%
% Irrigated Crops and Recreational 12% 49% 15% 47% 31%
% Non-Irrigated Crops and Native
Vegetation 16% 24% 45% 42% 35%
% Unmapped 48% 3% 4% 0% 7%
Much of the urban uses in the area are recent. This is shown by the significant population growth in the area, as highlighted Figure 4.17, which displays population data from the decennial US Census reports and a 2004 US Census estimate for the incorporated areas of Hemet and San Jacinto.
68 Hemet/San Jacinto Groundwater Management Area
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14.B.

!
!
San Jacinto River
Diamond Valley Lake
Hemet
San Jacinto
·|}þ79
·2|}þ43
·|}þ74
·|}þ79
Legend
Land Use*
Urban
Irrigated Agriculture
Native Vegitation
Water
! Cities
Major Roads
Management Area
October 2007
Hemet / San Jacinto Water Management Plan
1998 Land Use
Figure 4.16
0 0.5 1
Miles
±
*Urban includes: Commercial, Residential, Industrial,
Homes/Trailer Parks, Public Infrastructure, and Public Institutions.

Irrigated Agriculture includes: Dairy/Livestock,
Irrigated Cropland, Orchards & Vineyards, and Recreation.

Native Vegetation includes: Non-irrigated Cropland,
Open Space, Other Agriculture/Ranches, and Vacant
Source: EMWD

14.B.

State of the Management Area
0 10,000
20,000
30,000
40,000
50,000
60,000
70,000
19101920193019401950196019701980199020002004
Year
Population
Hemet San Jacinto
Figure 4.17 Population Growth in Incorporated Hemet and San Jacinto From 1950 to 2004, the population in Hemet increased twenty-fold and the population in San Jacinto increased sixteen-fold. Such urbanization results in changes in both water demand and hydrologic processes. For newly urbanized areas that were previously non-irrigated, water demands obviously increase significantly. Areas that change from irrigated agricultural uses to urban uses do not typically see major changes in the total annual water demand. However, water demand from urban users is typically less elastic than water demand from agricultural users, making drought contingencies more important. The requirements for water quality are also typically more stringent for urban users. From a hydrologic perspective, urbanization results in an increase in the impervious land area, e.g., more pavement and buildings, with the resulting increased runoff and decreased infiltration. Additionally, the water used indoors by urban users is sent to treatment plants, shifting the potential for recharge of this water from the area of use to the treatment plant area.

The urbanization trend is not unique to the Management Area, but has been pervasive throughout the fringes of urbanized Southern California. While the rate of urbanization may change in the future, the trend of urbanization is likely to continue and to play a significant role in land use and water demand. Further discussion of future land use changes may be found in Section 5.
70 Hemet/San Jacinto Groundwater Management Area
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14.B.

State of the Management Area

4.8 CURRENT WATER SUPPLIES
There are four Public Agencies primarily responsible for water supply in the Management Area:

EMWD, LHMWD, and Cities of Hemet and San Jacinto. In addition, Private Water Producers produce groundwater and purchase water from the Public Agencies, and the Soboba Tribe pumps groundwater for its respective uses. Each entity pumps groundwater, and some entities also utilize a mix of some of the following sources: surface water diversions, surface water and/or groundwater purchases, surface water imports, and recycled water. The water supply conditions in the Management Area and the interrelationships among the various agencies is a primary factor for future water management in the area. Figure 4.18 shows these interrelationships in a diagram form.

Figure 4.19 shows the makeup of the water supply and how this mix has changed from 1985 to 2004 for the Management Area. Groundwater is the predominant source of water supplies for the Management Area. The remaining sources are smaller, but still important, sources of water.

Supplies listed by entity are provided in Appendix F. Note that items such as sales to other agencies are not subtracted in these supply values, resulting in a supply that represents both wholesale and retail supplies. As a result of this definition, supplies will not equal the historical demand. Historical demand for the individual entities is shown in Figures 4.20 – 4.25.

4.8.1 GROUNDWATER
All entities pump groundwater for all or a portion of their water supply. The quantity of groundwater extraction for each Management Zone is shown in Figures 4.26a, 26b, and 4.27. 71 Hemet/San Jacinto Groundwater Management Area
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14.B.

NATURAL SYSTEM SURFACE WATER DIVERSION AND GROUNDWATER PRODUCTION SYSTEM Water Balance OutflowsWater Balance Inflows
Figure 4.18 Components of Hemet/San Jacinto Groundwater Balance Irrigation Demand
M&I Demand
Outdoor Use Indoor Use
Wastewater
Treatment Plant
Groundwater
Production
Groundwater
Production
Precipitation
San Jacinto
River and
Bautista Creek
Recharge
Recharge from
Irrigation
Recharge from
Agency Sales
Hemet/San Jacinto Groundwater Basin
Surface Water Imports
Outfall
Recharge from
Rainfall
Out of Basin Flows
San Jacinto River
and Tributary
Streams
SubsurfaceOutflow Subsurface
Inflow
Out of
Basin
Use
Conjunctive
Use
Recharge
Surface Water
Diversions
Recycled Water Use
Reclaimed
Water
Recharge
Recharge
from
Artificial
Recharge
Agency Sales
Ag Use M&I Use
Artifical
Recharge
Recycled Water
Storage
Artifical
Recharge

14.B.

State of the Management Area
0 10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
19841986198819901992199419961998200020022004
Year
Demand (AFY)
Groundwater Surface Water Recycled Imports
Figure 4.19 Annual Management Area Water Supplies
0 2,000
4,000
6,000
8,000
10,000
12,000
14,000
16,000
18,000
20,000
19841986198819901992199419961998200020022004
Year
Demand (AFY)
Figure 4.20 EMWD Historical Annual Demand
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14.B.

State of the Management Area
0 2,000
4,000
6,000
8,000
10,000
12,000
14,000
16,000
18,000
20,000
19841986198819901992199419961998200020022004
Year
Demand (AFY)
insufficient data
Figure 4.21 LHMWD Historical Annual Demand
0 1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
19841986198819901992199419961998200020022004
Year
Demand (AFY)
Figure 4.22 City of Hemet Water Service Area Historical Annual Demand 74 Hemet/San Jacinto Groundwater Management Area
Water Management Plan

14.B.

State of the Management Area
0 1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
19841986198819901992199419961998200020022004
Year
Demand (AFY)
Figure 4.23 City of San Jacinto Water Service Area Historical Annual Demand 0 5,000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
19841986198819901992199419961998200020022004
Year
Demand (AFY)
Figure 4.24 Private Water Producers Historical Annual Demand 75 Hemet/San Jacinto Groundwater Management Area
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14.B.

State of the Management Area
0 1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
19841986198819901992199419961998200020022004
Year
Demand (AFY)
Figure 4.25 Soboba Historical Annual Demand
0 10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
19841986198819901992199419961998200020022004
Year
Production (AFY)
Canyon Hemet North Hemet South Upper Pressure
Figure 4.26a Annual Groundwater Production, by Management Zone 76 Hemet/San Jacinto Groundwater Management Area
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14.B.

State of the Management Area
0 10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
19841986198819901992199419961998200020022004
Year
Production (AFY)
EMWD LHMWD Hemet San Jacinto Private Water Producers Soboba Tribe Figure 4.26b Annual Groundwater Production, by Entity
0 5,000
10,000
15,000
20,000
25,000
30,000
EMWD LHMWD Hemet San Jacinto Private
Pumpers
Soboba
Tribe
Entity
Average Production (AFY)
Canyon Hemet North Hemet South Upper Pressure
Figure 4.27 Average Annual Entity Groundwater Production, by Management Zone, 1984-2004
Since 1984, each entity except for the City of San Jacinto has pumped groundwater from multiple Management Zones. San Jacinto’s pumping during that time period has always been from the Upper Pressure Management Zones. The percentage of the water supply from groundwater for each remaining entity, compared to other components of the water supply, is shown in Figures 4.28a-e as a pie chart breaking down the entity’s 2004 groundwater supply by 77 Hemet/San Jacinto Groundwater Management Area
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14.B.

State of the Management Area
Management Zone. Additionally, Figure 4.29a-e presents stacked area charts showing the historical annual percentage of groundwater supply from each Management Zone. 13%
70%
17% Canyon
Hemet North
Hemet South
Upper Pressure
Figure 4.28a EMWD 2004 Groundwater
Production, Percentage by Supply Source
17%
83%
Canyon
Hemet North
Hemet South
Upper Pressure
Figure 4.28c City of Hemet Water Service Area
2004 Groundwater Production, Percentage by
Supply Source
61%
33%
6%
Canyon
Hemet North
Hemet South
Upper Pressure
Figure 4.28b LHMWD 2004 Groundwater
Production, Percentage by Supply Source
100%
Canyon
Hemet North
Hemet South
Upper Pressure
Figure 4.28d Soboba 2004 Groundwater
Production, Percentage by Supply Source
3%
61% 20%
16% Canyon
Hemet North
Hemet South
Upper Pressure
Figure 4.28e Private Water Producers 2004
Groundwater Production, Percentage by Supply
Source
78 Hemet/San Jacinto Groundwater Management Area
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14.B.

State of the Management Area
0%
20%
40%
60%
80%
100%
19841985
198619871988
1989199019911992
199319941995
1996
19971998
199920002001
2002
20032004
Canyon Hemet North Hemet South Upper Pressure
Figure 4.29a EMWD Historical Groundwater Production, Percentage by Supply Source
0%
20%
40%
60%
80%
100%
19841985
19861987
1988
1989
19901991
1992
19931994
1995
19961997
199819992000
20012002
20032004
Canyon Hemet North Hemet South Upper Pressure
Figure 4.29b LHMWD Historical Groundwater Production, Percentage by Supply Source
0%
20%
40%
60%
80%
100%
19841985
1986
1987
198819891990
1991
1992
199319941995
1996
1997
1998
19992000
20012002
20032004
Canyon Hemet North Hemet South Upper Pressure
Figure 4.29c City of Hemet Water Service Area Historical Groundwater Production, Percentage by Supply Source
79 Hemet/San Jacinto Groundwater Management Area
Water Management Plan

14.B.

State of the Management Area
0%
20%
40%
60%
80%
100%
19841985
19861987
198819891990
1991
1992
19931994
1995
19961997
1998
19992000
20012002
2003
2004
Canyon Hemet North Hemet South Upper Pressure
Figure 4.29d Soboba Historical Groundwater Production, Percentage by Supply Source
0%
20%
40%
60%
80%
100%
19841985
19861987
198819891990
1991
1992
199319941995
19961997
1998
19992000
20012002
20032004
Canyon Hemet North Hemet South Upper Pressure
Figure 4.29e Private Water Producers Historical Groundwater Production, Percentage by Supply Source
The pie charts show that in 2004 the Upper Pressure Management Zone provided the majority of groundwater for four of the six entities. The Hemet South Management Zone provided the majority of water to the City of Hemet Water Services Area and The Canyon Management Zone provided all groundwater for the Soboba Tribe.

The only significant trend seen in the 1984 - 2004 historical annual charts is LHMWD’s shift in groundwater sources from majority Canyon Management Zone water in the mid-1980s to mostly Upper Pressure Management Zone water recently. These charts also emphasis the importance of the Upper Pressure Management Zone, as it was a component of the groundwater supply for all entities over the 1984 – 2004 time period.

4.8.2 IMPORTED WATER
EMWD is a member agency of the MWD, and, as such, is able to import water from Northern California via the State Water Project and from the Colorado River Aqueduct. Imported water is used for supply as well as for groundwater recharge; this section only discusses imported 80 Hemet/San Jacinto Groundwater Management Area
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14.B.

State of the Management Area
water for supply, imported water for recharge is discussed in Section 4.6.1. District-wide, imported water comprises 80% of EMWD’s total potable water supply. However, imported water is a small portion of EMWD’s water supply in the Management Area due to the availability of high quality groundwater, which is less common in the rest of the EMWD service area. Over the 1984-2004 period, imported water represented 13% of EMWD’s supply and 2% of the total Management Area supply (WRIME, 2003a). In 2004, imported water represented 41% of EMWD’s supply and 9% of the total supply for the Management Area (EMWD, 2005a,b).

The usage of imported water for direct use has been variable over the past decades, as shown in Figure 4.30. The volume of water imported was reduced in 1991 as the importation of unfiltered Colorado River water to the Management Area was curtailed to meet the requirements of the Surface Water Treatment Rule, part of the Safe Drinking Water Act.

Imported water usage in recent years has increased, which in turn reduced the stress on groundwater resources in the Management Area.
0 1,000
2,000
3,000
4,000
5,000
6,000
7,000
19841986198819901992199419961998200020022004
Year
Imported Water (AFY)
Figure 4.30 Annual Imported Water Supply

4.8.3 RECYCLED WATER
Recycled water is treated at EMWD’s San Jacinto Valley Regional Water Reclamation Facility and is currently used primarily for irrigation in the public municipal areas, industrial uses, and agricultural irrigation purposes in the Management Area and for habitat creation at the California Fish and Game San Jacinto Wildlife Area outside the Management Area. Recycled water is a highly reliable source of supply and will increase in availability as the population of the Management Area increases. Most of the recycled water is sold by EMWD to private land owners for agricultural irrigation. Recycled water usage in the Management Area has been fairly stable over the past decades, with approximately 5,000 AF supplied in 2004. Annual amounts of recycled water use are presented in Figure 4.31. 81 Hemet/San Jacinto Groundwater Management Area
Water Management Plan

14.B.

State of the Management Area
0 1,000
2,000
3,000
4,000
5,000
6,000
7,000
19841986198819901992199419961998200020022004
Year
Recycled Water (AFY)
Figure 4.31 Annual Recycled Water Supply

4.8.4 SURFACE WATER
LHMWD has pre-1914 rights for the diversion and storage of surface water from the San Jacinto River and its tributaries. These rights date back to the late 1800s, and the diversion amounts are filed each year with the Division of Water Rights, State Water Resources Control Board on Annual Notices of Groundwater Extraction or Diversion, numbers G330016, G330017, and G330018.

When available, LHMWD diverts surface water for direct use. It should be noted that the San Jacinto River is an ephemeral river. The river may not flow every year and, therefore, there may be occasional years where diversion is not possible. Annual surface water diversions for 1985-2004 are shown in Figure 4.32. Details of the surface water rights are discussed in Section 7.1.
0 1,000
2,000
3,000
4,000
5,000
6,000
7,000
19851986198719881989199019911992199319941995199619971998199920002001200220032004 Year
Surface Water (AFY)
Figure 4.32 Annual Surface Water Supply
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14.B.

State of the Management Area
EMWD’s surface water diversions are not utilized for direct use and are therefore not considered part of the water supply. More information on EMWD’s surface water diversions is included in Section 7, Surface Water Rights.

4.8.5 PURCHASES FROM EMWD
LHMWD, City of Hemet, and City of San Jacinto purchase water from EMWD to supplement their water supplies. The annual volume of water sold to the other agencies by EMWD is shown in Figure 4.33. In addition to these sales, EMWD sells recycled water to private land owners for agricultural irrigation.
0 3,000
6,000
9,000
19841986198819901992199419961998200020022004
Year
EMWD Sales to Other Agencies
(AFY)
Figure 4.33 Annual Sales by EMWD to Other Agencies within Management Area

4.9 ESTIMATES OF SAFE YIELD AND OVERDRAFT

4.9.1 SAFE YIELD
The Safe Yield of the Management Area is defined in the Stipulated Judgment as the long term, average quantity of water supply in the Management Area that can be pumped without causing undesirable results, including the gradual reduction of natural groundwater in storage over long-term hydrologic cycles.

The following clarifying notes are presented to better define the Safe Yield definition:
 Period of Record: Safe Yield is a function of annual variability of the hydrology, but should reflect long-term average conditions, including wet and dry replenishment conditions. Identification of “long term, average” is important, but difficult to determine, as precipitation is highly variable from year to year and subject to long-term climatic changes. As hydrologic data will continue to be 83 Hemet/San Jacinto Groundwater Management Area
Water Management Plan

14.B.

State of the Management Area
collected and a greater understanding of the hydrology will be gained, the period of record for determining the Safe Yield will be subject to change over time.  Water Supply Components: The following components of water supply are considered in the definition of Safe Yield:
a. Natural recharge from infiltration of precipitation, b. Recharge from infiltration of streamflow and other surface water runoff, c. Recharge from infiltration of irrigation applied water on agricultural lands,
d. Recharge from infiltration of outdoor irrigation in the urbanized areas, e. Artificial recharge, such as replenishment programs, historically operated, using imported, recycled, and surface water diversions, f. Subsurface groundwater inflows, such as from the Lower Pressure Management Zone and the boundaries of the basin, and
g. Subsurface groundwater outflows, such as to the Lakeview portion of the Lakeview/Hemet North Management Zone.
 Study Area: Safe Yield is calculated for the Management Area as one unit, and not by the smaller units of Management Zones.
 Undesirable Effects: The definition of Safe Yield emphasizes protection of groundwater in storage. It is assumed that potential undesirable effects on water quality are indirectly addressed, and therefore are not included in the analysis.

The Safe Yield of the Management Area has been estimated in a number of studies in the past.

A summary of methods, hydrologic periods, and results from each study is presented in Table 4.5.

Two major methodologies have traditionally been used to estimate the Safe Yield: (1) Water Balance methodology, and (2) Change in storage methodology. These methods are briefly described below.
84 Hemet/San Jacinto Groundwater Management Area
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14.B.

State of the Management Area
Table 4.5 Published Estimates of Safe Yield for the Management Area Yield Study Method Time
Period
Safe Yield
(AFY)
Pumping
(AFY)
Overdraft
(AFY)
Fritz and Rosell*, 1947 Water Balance
(Conventional)
1920-1945 27,400
(35,100 w/o
trees/brush)
32,400 4,800
Schwartz*, 1967 Water Balance
(Conventional)
1923-1960 26,100 n/a 12,100
EMWD White Paper,
2000
Water Level Recovery
Analysis
Variable 50,000 60,600 10,600
GIS Recharge Estimates Change in Storage (GIS) 1998-2003 39,700 n/a n/a WRIME, 2003d Water Balance
(Conventional)
1984-2001 44,700 59,000 14,300
Based on TechLink,
2002a
Water Balance (Modelbased) 1984-1999 41,300 58,000 16,700 * Fritz and Rosell (1947) and Schwartz (1967) both used a larger geographic area that roughly included what is today called the San Jacinto-Lower Pressure Management Zone. This additional area is the area northwest of Bridge Street to Redlands Boulevard in Moreno Valley.

4.9.1.1 Method 1 - Water Balance Method
The water balance method utilizes inflows and outflows from the basin to estimate change in storage and the Safe Yield of the basin. The amount of pumping that can be sustained with little or no long-term change in storage is the Safe Yield of the basin. The Safe Yield estimate may be calculated by
Safe Yield = Change in Groundwater Storage + Groundwater Production, where Change in Groundwater Storage is Inflows less Outflows. The estimate must be over a long-term base period which reflects a number of wet, normal, and dry periods. Groundwater production values are based on historical data as reported by the Public Agencies and estimated for the Private Water Producers. The TC has reviewed and agreed to the data for use in the Water Balance Method. The following inflow and outflow components are used to calculate Change in Groundwater Storage for the Management Area:

Inflows
 Recharge from Retail Water Sales,
 Recharge from Irrigation Return Flow,
 Recharge from Precipitation,
85 Hemet/San Jacinto Groundwater Management Area
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14.B.

State of the Management Area
 Grant Avenue Ponds Diversion Recharge,
 Reclaimed Ponds Recharge,
 Recharge from Recycled Water Sales,
 Subsurface Inflow from Other Management Zones,
 Bautista Creek Recharge,
 San Jacinto River Recharge, and
 Boundary Inflow.

Outflows
 Subsurface Outflow to Other Management Zones,
 Boundary Outflow, and
 Groundwater Production.

4.9.1.2 Method 2 - Change in Storage Methodology
This method uses a GIS database to develop surfaces of groundwater elevations based on observed groundwater levels at multiple control points (i.e., wells) throughout the Management Area for two different time periods. The product of change in volume between the two surfaces at two different times and the specific yield of the aquifer determines the change in storage between those two time points. The Safe Yield is then calculated as the sum of the calculated change in storage and the groundwater production during the same time period. Variations of this method are used based on the spatial distribution, including vertical distribution, of the specific yield in the aquifer system.

4.9.1.3 Summary of Previous Yield Estimates
Calculation of Safe Yield is a function of the hydrologic period used in the analysis. Figure 4.34 presents the long-term hydrologic conditions as precipitation at San Jacinto gaging station (RCFC&WCD Site #186), along with estimates of the Safe Yield. As indicated in the figure, the Safe Yield estimates range from 26,400 to 44,700 AFY. Since the two estimates made by Fritz & Rosell (1947) and Schwartz (1967) are based on much older data sets and short-term hydrologic records, and the geographic area may not be consistent with some of the more recent estimates, the TC decided in its August 25, 2005 meeting not to use these estimates. Instead, the TC concluded that the Safe Yield of the Management Area ranges from approximately 40,000 to 45,000 AFY based on the most recent analyses.

The TC also concluded that the following guidelines for estimation of Safe Yield of the Management Area be considered by the Watermaster when calculating Safe Yield in the future:
86 Hemet/San Jacinto Groundwater Management Area
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14.B.

Figure 4.34 Safe Yield Estimates
-80-60-40-20
0 2040
1910
1915
1920
1925
1930
1935
1940
1945
1950
1955
1960
1965
1970
1975
1980
1985
1990
1995
2000
Year
San Jacinto Precipitation (Inches)
2000025000300003500040000450005000055000600006500070000 Yield (AFY)
Fritz and Rossel Water Balance- clear river channel35,100 AFYFritz and Rossel Water Balance 27,400 AFY Schwartz Water Balance 26,100 AFY
2003 OY Water Balance - 41,300 AFY
2003 OY Water Balance
69,000 AFY 2003 OY Water Balance
63,600 AFY
GIS
39,700 AFY
GW Model 41,400 AFY
2003 OY Water Balance29,300 AFY
2003 OY Water Balance 43,700 AFY
2003 OY Water Balance - 26,500 AFY
EMWD, 2000 White Paper 50,000 AFY
Cumulative Departure from Mean Annual Precipitation
Annual Precipitation Mean Annual Precipitation
Safe Yield = 40,000 - 45,000 AFY
* OY = Operational Yield Report

14.B.

State of the Management Area
 Review and modify Safe Yield, if necessary, upon the recommendation of the TC or as the Watermaster may determine.
 Use latest available data with consideration for proper spatial, temporal, and vertical characteristics of the aquifer system.
 Consider a long period of record that includes above average, below average, and normal conditions.
 Consider latest methodologies that can provide more flexibility based on the available data and information, as necessary.
 Consider using the San Jacinto Watershed Groundwater Model, with appropriate updates and calibration, for re-estimation of groundwater conditions, as needed.

4.9.2 OVERDRAFT
Overdraft is defined in the Stipulated Judgment as the condition whereby groundwater production in the Management Area exceeds the Safe Yield, creating undesirable conditions in the basin. The amount of overdraft is calculated as the difference between long-term average annual groundwater production in the Management Area and Safe Yield. Figure 4.35 shows the estimated annual groundwater production in the Management Area, along with the range of Safe Yield. Based on this figure, the overdraft in the Management Area is estimated to be 10,000 to 15,000 AFY. For planning purposes and to evaluate options to reduce the overdraft, this Plan assumes that the overdraft is at least 10,000 AFY.

4.10 WATER QUALITY CONDITIONS
This section presents a summary of the groundwater quality conditions in the Management Area. This description will assist in establishing a baseline condition for future water management efforts to maintain or improve groundwater quality in the Management Area. The TC has decided that the water quality conditions in the Management Area would be evaluated based on TDS and nitrate levels. This is consistent with the TIN/TDS studies (Wildermuth, 2000) and the emphasis on TDS and nitrate in the Basin Plan as amended (RWQCB, 2004).

The Management Area lies within the jurisdiction of the RWQCB, Santa Ana Region 8. The RWQCB implements state and federal laws through adoption of Water Quality Control Plans or Basin Plans (RWQCB, 1995). The Basin Plan establishes both the legal beneficial use designations and sets the standards to protect these uses. The Basin Plan was recently amended (RWQCB, 2004) to incorporate an updated TDS and Nitrogen Management Plan for the Santa Ana Region, including revised groundwater Management Zones (combining Hemet North and Lakeview into one Management Zone; Hemet North remains treated separately from Lakeview 88 Hemet/San Jacinto Groundwater Management Area
Water Management Plan

14.B.

30,000
35,00040,00045,00050,00055,00060,00065,00070,00075,000
1958
1968
1978
1988
1998
Year
Annual Pumping and Safe Yield (AFY)
Annual Groundwater Production (AFY)
Figu
re 4.3
5 Ground
water Production and Range of Safe Yield Estimates
Safe Yield: 40,000 – 45,000 AFY
Average Production: 54,800 AFY
State of the Management Area
in this Plan), TDS and nitrate quality objectives for groundwater, TDS and Nitrogen waste load allocations, and stream reach designations.

Within the Santa Ana Watershed, which includes the Management Area, a statistical method has been developed to use nitrate (as N) and TDS to evaluate the status of water quality; to compare sub-basin concentrations; and to trigger management actions (RWQCB, 2004; Wildermuth, 2000, 2005). Point statistics were used to show (i) historical ambient water quality conditions as represented by the 1954-1973 time period, (ii) 1997 Current ambient water quality conditions as represented by the 1978-1997 time period, and (iii) 2003 Current ambient water quality conditions as represented by the 1984-2003 time period. A summary of the data is shown in Table 4.6, revealing nitrate (as N) levels below the MCL of 10 mg/L for all cases. TDS exceeds the recommended secondary MCL of 500 mg/L in Hemet South (current and historical) and Hemet North (current and historical), and TDS exceeds the maximum secondary MCL of 1000 mg/L in the 1997 current levels in Hemet South.

Table 4.6 Historical (1954-1973), 1997 Current (1978-1997), and 2003 Current (1984- 2003) Ambient Nitrate as N and TDS Concentrations (mg/L) Nitrate as N 1 TDS2
Subbasin Basin Plan
Objective3 Historical
1997
Current
2003
Current
Basin Plan
Objective4 Historical
1997
Current
2003
Current
Canyon 2.5 2.5 1.6 2.1 230 234 220 420
Upper
Pressure

1.4 1.4 1.9 1.7 320 321 370 370
Hemet
South

4.1 4.1 5.2 5.4 730 732 1030 850
Hemet
North

1.8 1.8 2.7 3.4 520 519 830 840
Source: Wildermuth, 2005. 2003 update 1984-2003)
1 Table 3-2
2 Table 3-1
3 Basin Plan Amendment, 2004 (Table 5-4)
4 Basin Plan Amendment, 2004 (Table 5-3)
The point statistics and water quality objectives were used by the RWQCB to develop estimates of assimilative capacity. Areas with assimilative capacity are able to accept waters with higher concentrations of a constituent than the concentration in the receiving waters because natural processes such as recharge and dilution will allow for the water quality objectives to continue to be met. The most recent computations indicate that Hemet South, Hemet North, Canyon, and Upper Pressure Management Zones do not currently have assimilative capacity for TDS. For nitrate, the Hemet South, Hemet North, and Upper Pressure Management Zones do not have 90 Hemet/San Jacinto Groundwater Management Area
Water Management Plan

14.B.

State of the Management Area
assimilative capacity remaining, and the Canyon area has only a very small amount of nitrate that it can assimilate (0.4 mg/l nitrate as N; Wildermuth, 2005).

Table 4.7 shows the changes seen over the 30-year time period between the historical and 2003 Current time periods. The Canyon Management Zone shows a decrease in nitrate as N concentrations while all other nitrate (as N) and TDS concentrations for all other Management Zones show increases in concentrations of between 0.3 and 1.6 mg/L nitrate (as N) and 49 to 321 mg/L TDS. It should be noted that changes seen between these time periods are a combination of true changes in ambient water quality and artificial changes due to limitations in monitoring data and the estimation technique (Wildermuth, 2005). In the future, as current monitoring programs assemble more data, a long-term record of analytical data at specific wells will be available to better show changes over time at specific locations.

Table 4.7 Change in Ambient Concentration (mg/L) of Nitrate as N and TDS, Between Historical (1954-1973) and 2003 Current (1984-2003) Time Periods Sub-basin
Change in
Nitrate as N
(mg/L)
Change in TDS
(mg/L)
Canyon -0.4 186
Upper Pressure 0.3 49
Hemet South 1.3 118
Hemet North 1.6 321
The most recent data from public and private wells, as complied by EMWD, were used to plot the 2004 nitrate (as N) and TDS conditions as shown in Figures 4.36 and 4.37. While these values are taken from wells screened at different depths, the plots show the general variability in concentrations across the Management Area.
91 Hemet/San Jacinto Groundwater Management Area
Water Management Plan

14.B.

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Diamond Valley Lake
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San Jacinto
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Legend
Nitrate as N (mg/L)*
! 0 - 2
! 3 - 5
! 6 - 10
! 11 - 15
! 16 - 30
! Over 30
! Cities
Major Watercourses
Lakes and Reservoirs
Major Roads
Management Area
October 2007
Hemet / San Jacinto Water Management Plan
2004 Nitrate as N Concentrations in Groundwater (mg/L)
Figure 4.36
0 0.5 1
Miles
±
*Source: EMWD

14.B.

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San Jacinto River
Diamond Valley Lake
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San Jacinto
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Legend
TDS (mg/L)*
! 0 - 500
! 501 - 750
! 751 - 1000
! 1001 - 1500
! 1501 - 3000
! Over 3000
! Cities
Major Watercourses
Lakes and Reservoirs
Major Roads
Management Area
October 2007
Hemet / San Jacinto Water Management Plan
2004 TDS Concentrations in Groundwater (mg/L)
Figure 4.37
0 0.5 1
Miles
±
*Source: EMWD

14.B.

State of the Management Area
(This Page Left Blank Intentionally)
94 Hemet/San Jacinto Groundwater Management Area
Water Management Plan

14.B.

SECTION 5 PROJECTED WATER DEMANDS

AND FUTURE PLAN PHASES

5.1 PROJECTED LAND USE CONDITIONS
This Section presents a brief description of the projected land use conditions in the Management Area. Figure 5.1 shows the general land use categories at build-out.

Area UWMPs echo the projected urban growth indicated in the build-out land use:
 EMWD UWMP – EMWD service area population, including areas outside the Management Area, projected to increase from 494,000 in 2005 to 830,000 in 2025. (EMWD, 2005a)
 LHMWD UWMP – LHMWD service area population projected to increase from 39,100 in 2005 to 49,500 in 2025. (LHMWD, 2005)
 Hemet UWMP:
 City of Hemet population projected to increase from 78,600 in 2005 to 154,000 in 2025; and
 City of Hemet water system service area population projected to increase from 20,200 in 2005 to 22,300 in 2025. (Hemet, 2006)
 San Jacinto UWMP:
 City of San Jacinto population projected to increase from 34,100 in 2005 to 63,600 in 2025; and
 City of San Jacinto water system service area population projected to increase from 13,200 in 2005 to 24,000 in 2025. (San Jacinto, 2005) The total land use acreage for each category is estimated and presented in Table 5.1.

Based on Tables 5.1 and 4.3, the urban area is projected to increase from 28% in the 1998 survey to 65% at build out. This increase is due to a combination of conversion of agricultural land and undeveloped land to urban uses. These future conversions have significant implications on the total projected water demand in the Management Area, as well as impacts on the precipitation, runoff, and recharge conditions. This concept is further discussed in the following sections. 95 Hemet/San Jacinto Groundwater Management Area
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14.B.

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Diamond Valley Lake
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San Jacinto
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Legend
Land Use*
Urban
Irrigated Agriculture
Native Vegitation
Water
! Cities
Major Roads
Management Area
October 2007
Hemet / San Jacinto Water Management Plan
2025 Projected Ultimate Land Use
Figure 5.1
0 0.5 1
Miles
±
*Urban includes: Commercial, Residential, Industrial,
Homes/Trailer Parks, Public Infrastructure, and Public Institutions.

Irrigated Agriculture includes: Dairy/Livestock,
Irrigated Cropland, Orchards & Vineyards, and Recreation.

Native Vegetation includes: Non-irrigated Cropland,
Open Space, Other Agriculture/Ranches, and Vacant
Source: EMWD

14.B.

Projected Water Demands and Future Plan Phases
Table 5.1 Generalized Projected Acreage in the Management Area Land Use Total Acreage Percent
Urban 37,100 65%
Irrigated Cropland 8,100 14%
Non-Irrigated Cropland 4,500 8%
Water 3,600 6%
Unmapped* 4,000 7%
Total 57,300 100%
*Unmapped areas are outside EMWD’s service area and were not included in the EMWD ultimate land use dataset.

Source: EMWD ultimate land use (1998), based on city general plans

5.2 PROJECTED WATER DEMANDS
Projected water demands are based on information contained in 2005 UWMP, the Hemet/San Jacinto Water Management Area 2004 Annual Report (EMWD, 2005b), and Basin Assessment Report Technical Memorandum No. 1 (WRIME, 2003a). The projected water demands of each of the stakeholders and of the Management Area as a whole are described below.

5.2.1 EMWD
Projected retail water demand for the portion of EMWD’s service area within the Management Area is based on the Hemet/San Jacinto Water Management Area 2004 Annual Report. Projected total demand is shown together with recent historical demand in Figure 5.2. Estimates of projected demand are also presented in the EMWD’s 2005 UWMP, but these values are for the entire EMWD service area; the UWMP system-wide projections show a similar rate of increase in water demand of approximately 50% from 2005 to 2020. 97 Hemet/San Jacinto Groundwater Management Area
Water Management Plan

14.B.

Projected Water Demands and Future Plan Phases
0 5,000
10,000
15,000
20,000
25,000
1984198619881990199219941996199820002002200420062008201020122014201620182020 Year
Demand (AFY)
Historical Data Projected Data
Figure 5.2 EMWD Historical and Projected Demand

5.2.2 LHMWD
Projected water demand is based on Lake Hemet Municipal Water District 2005 Urban Water Management Plan (LHMWD, 2005). Projected total demand is shown together with recent historical demand on Figure 5.3.
0 5,000
10,000
15,000
20,000
25,000
1984198619881990199219941996199820002002200420062008201020122014201620182020 Year
Demand (AFY)
Historical Data Projected Data
Figure 5.3 LHMWD Historical and Projected Demand
98 Hemet/San Jacinto Groundwater Management Area
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14.B.

Projected Water Demands and Future Plan Phases

5.2.3 CITY OF HEMET WATER SERVICE AREA
Projected water demand in the City of Hemet’s water service area is based on City of Hemet 2005 Urban Water Management Plan (Hemet, 2006). Projected demand is shown together with recent historical demand on Figure 5.4.
0 1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
1984198619881990199219941996199820002002200420062008201020122014201620182020 Year
Demand (AFY)
Historical Data Projected Data
Figure 5.4 City of Hemet Water Service Area Historical and Projected Demand

5.2.4 CITY OF SAN JACINTO
Projected water demand in the City of San Jacinto’s water service area is based on City of San Jacinto 2005 Urban Water Management Plan (San Jacinto, 2005). Projected demand is shown together with recent historical demand on Figure 5.5.
99 Hemet/San Jacinto Groundwater Management Area
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14.B.

Projected Water Demands and Future Plan Phases
0 1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
1984198619881990199219941996199820002002200420062008201020122014201620182020 Year
Demand (AFY)
Historical Data Projected Data
Figure 5.5 City of San Jacinto Water Service Area Historical and Projected Demand

5.2.5 SOBOBA TRIBE
Projected water demand for the Soboba Tribe is taken from the Settlement Agreement, assuming that the Settlement Agreement is implemented in 2008. Projected total demand is shown together with recent historical demand on Figure 5.6. 0 1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
1984198619881990199219941996199820002002200420062008201020122014201620182020 Year
Demand (AFY)
Historical Data Projected Data
Figure 5.6 Soboba Tribe Historical and Projected Demand 100 Hemet/San Jacinto Groundwater Management Area
Water Management Plan

14.B.

Projected Water Demands and Future Plan Phases

5.2.6 PRIVATE WATER PRODUCERS
Projected water demand for the Private Water Producers is a refinement of estimates presented in the Operational Yield Study (WRIME, 2003d) based on updated information on current and future development and their impact on water demand. Figure 5.7 shows the assumed future agricultural water use by local producers together with recent historical demand. 0 5,000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
1984198619881990199219941996199820002002200420062008201020122014201620182020 Year
Demand (AFY)
Historical Data Projected Data
Figure 5.7 Private Water Producers Historical and Projected Demand

5.2.7 MANAGEMENT AREA
Projected and historical water demand for the Management Area as a whole presented in Figure 5.8 as the sum of the demand for the individual entities presented in the previous subsections.
101 Hemet/San Jacinto Groundwater Management Area
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14.B.

Projected Water Demands and Future Plan Phases
50,000
55,000
60,000
65,000
70,000
75,000
80,000
1984198619881990199219941996199820002002200420062008201020122014201620182020 Year
Demand (AFY)
Historical Data Projected Data
Figure 5.8 Management Area Historical and Projected Demand

5.3 FUTURE PLAN PHASES
The Integrated Recharge and Recovery Project is considered to be the core of the Physical Solution. The project is designed and implemented in two Phases. Phase I is described in Section 3 of this Plan. While Phase II facilities are described at the conceptual level, and the EIR is certified, there are additional projects that have been considered by the TC and will need to be evaluated for possible design and implementation. Following is a discussion of Phase II of the IRRP, along with other potential projects.

5.3.1 SAN JACINTO RIVER INTEGRATED RECHARGE AND RECOVERY PROJECT, PHASE II Phase II of the project consists of construction of the remaining portions of the San Jacinto Integrated Recharge and Recovery Project. The information presented here is based on previously published documents adjusted based on the latest knowledge at the time of publication from ongoing negotiations with regulators. Phase II will provide up to 110 cfs of recharge water capacity and will cost approximately $50 million*. A schematic of Phase II is shown in Figure 5.9. Major activities during Phase II are:

1. Construction of Recharge Basins - This activity includes construction of nine additional recharge ponds within the San Jacinto River bed in three clusters of

*
Number has been updated since the publication of the IRRP Feasibility Report. 102 Hemet/San Jacinto Groundwater Management Area
Water Management Plan

14.B.

Wa
rrenPumpStation
CommonwealthPumpStation
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October2007
±

00.51 Miles
Legend
PumpStation
PhaseIPipeline
PhaseIIPipeline
PhaseIPonds
PhaseIIPonds
ExistingPipeline
PhaseIWellField
PhaseIIWellField
Hemet/SanJacinto
WaterManagement
Plan
SchematicofIntegrated
RechargeRecovery
Program-PhasesIandII
Figure5.9
Source:EMWD

14.B.

Projected Water Demands and Future Plan Phases
three basins each, covering approximately 35 acres. Combined Phases I and II will have 15 basins covering approximately 70 acres*.

2. Construction of Pipelines - This includes design and construction of a 7.7 mile water supply pipeline from the EM-14 turnout to the proposed recharge basins.

Included is increasing the capacity of the EM-14 turnout structure from 40 cfs to 110 cfs; replacing 200 feet of 48-inch-diamater pipeline with 63-inch-diamater pipeline; constructing 15,800 feet of new 54-inch-diamater pipeline paralleling the existing 39-inch-diamater pipeline; and constructing 24,800 feet of new 57-inch-diameter pipeline paralleling the existing 33-inch-diamater pipeline.

3. Pump Station Upgrades – Upgraded or new pump stations would be built to increase capacity at the Warren Road and Commonwealth pump stations.

4. Drilling of Extraction Wells - This includes construction and testing of up to five additional extraction wells designed and operated identically to those constructed in Phase I. The construction of these new wells will result in a total of up to eight Phase I and II extraction wells.

5. Design and Construction of Monitoring Wells – Up to three additional monitoring wells will be constructed, bringing the total number of Phase I and II monitoring wells to up to six wells.

Only Phase I has been designed in detail and funding sources are being secured.

5.3.2 POTENTIAL CONJUNCTIVE USE PROJECTS
Conjunctive use is the coordinated operation of surface water storage and use, groundwater storage and use, and conveyance facilities to meet water management needs. This recognizes that there is a hydrologic connection between the surface water resource and the groundwater resource (DWR, 2006). In the Management Area, conjunctive use helps utilize available subsurface storage along with seasonally available water (imports and local surface water) or recycled water. Methods currently being considered include direct recharge and in-lieu recharge.

As part of the basin planning process, the TC identified and selected seven potential direct recharge sites and two potential in-lieu recharge projects for further evaluation and prioritization out of a pool of 15 direct recharge sites and two in-lieu projects initially considered. Further information is provided in Hemet/San Jacinto Basin Assessment – Basin Assessment Report/Integrated Water Management Plan, Technical Memorandum No. 2, Analysis of Impacts of Conjunctive Use Projects (WRIME, 2003c).

The recharge sites were selected based on screening criteria that included:

*
Number has been updated since the publication of the IRRP Feasibility Report. 104 Hemet/San Jacinto Groundwater Management Area
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14.B.

Projected Water Demands and Future Plan Phases
 General site characteristics (size, recharge needs, ownership, etc.),  Hydrogeologic suitability,
 Sub-basin interaction,
 Engineering suitability,
 Land use suitability, and
 Environmental impacts.

The seven potential direct-recharge sites and two in-lieu projects are shown on Figure 5.10. In general, the direct recharge sites would utilize imported water, surface water, or recycled water to recharge the groundwater through surface spreading; the in-lieu projects (Upper Pressure InLieu Project and Hemet-Simpson CU Area) were designed to reduce the amount of groundwater production by delivering imported water, from either the Colorado River or the State Water Project, to be used in conjunction and coordination with local groundwater.

A preliminary description of the recharge sites is presented based on information from City of Hemet, City of San Jacinto, LHMWD, and EMWD, along with a brief review of available reports. Table 5.2 summarizes the findings for the nine potential projects. All findings are tentative planning-level data and should not be used in any intensive analysis without further research.

The identification of the potential sites allows for the concentration of future work on these sites. The future work includes:
 Evaluation of the general site conditions;
 Evaluation of water supply availability and reliability;  Preparation of an environmental checklist; and
 Evaluation of the effectiveness of the projects in meeting the goals and objectives of the Management Area.

A more detailed description of each site is provided below.

5.3.3 DIRECT RECHARGE PROJECTS
Direct recharge projects involve utilizing available imported, surface, or recycled water in a constructed basin for percolation to groundwater. Successful projects require a site with high permeability to allow for water to quickly percolate to groundwater; compatible nearby land uses; an available and accessible water supply; and the ability to either recapture the water or allow the water to raise groundwater levels. The Plan supports the use of direct recharge of water of suitable quality.
105 Hemet/San Jacinto Groundwater Management Area
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14.B.

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Diamond Valley Lake
Salt Creekbetween
Lyon Avenue
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Little Valley
Bautista Flood
Control Ponds
Fairview
Cienega
Bautista Creek
along Florida
Avenue
Buena Vista
Flood Control
Basin
Hemet Simpson
Conjunctive
Use Project
Recycled Water
In-Lieu Project
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San Jacinto
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Preferred Conjunctive Use Locations
! Cities
Major Watercourses
Lakes and Reservoirs
Major Roads
Management Area
October 2007
Hemet / San Jacinto Water Management Plan
Location of Nine Preferred Projects
Figure 5.10
0 0.5 1
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Projected Water Demands and Future Plan Phases
Table 5.2 Summary of Selected Conjunctive Use Site Conditions Site Project
Type Water Source
Annual
Water
Availability
Soils
Infiltration
Rate
Approximate
Depth to
Water
(ft)
Potential
Constraints
Buena Vista
Flood Control
Basin
Recharge Runoff, recycled,
or imported 600 AF n/a 200 – 250 Groundwater quality
Cienega Recharge River diversion n/a High 210 - 240 Kangaroo Rat, water rights
Fairview Recharge River diversion n/a High 210 - 240 Kangaroo Rat, water rights
Bautista Creek
along Florida
Avenue
Recharge
Irrigation water,
Bautista Creek,
imported
n/a Moderate n/a n/a
Salt Creek
between Lyon
Avenue and State
Street
Recharge Salt Creek
diversion/runoff 1,000 AF Moderate 200 - 250 n/a
Little Valley Recharge Runoff, LHMWD
flume, imported n/a High and variable 85
Potential
archeological
sites, shallow
bedrock
Bautista Flood
Control Ponds Recharge Surface runoff/ river diversion n/a n/a 180 - 210 No proponent Upper Pressure
In-lieu Project In-lieu Imported (Colorado River) n/a n/a Must gain
agreements
between many
parties
Hemet-Simpson
Conjunctive Use
Project
In-lieu
Imported
(Colorado River
and State Water
Project)
n/a n/a
Must gain
agreements
between many
parties

5.3.3.1 Buena Vista Flood Control Basin
The existing Buena Vista flood control basin has been identified as a potential recharge project site. Buena Vista basin, located at the end of Buena Vista Street north of Esplanade Avenue, is located in the Upper Pressure Management Zone and is owned and operated by RCFC&WCD. 107 Hemet/San Jacinto Groundwater Management Area
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14.B.

Projected Water Demands and Future Plan Phases
The site would initially use storm water for recharge purposes. Recharge water would be conveyed to the site from the 2,700-acre drainage area by existing drainage facilities that are owned by RCFC&WCD. It is estimated that approximately 600 AF of water could be delivered to the basin via runoff, with a first flush volume of approximately 20 AF. Surface water quality is good, with some elevated levels of oil and grease, suspended residues, and iron, based on sampling on March 6, 1992 (Singh, 1992). The basin can be enlarged through excavation to provide an additional 36 AF of storage volume, approximately equal to the average storm event runoff.

There is an existing EMWD raw water pipeline that runs nearby along Oakwood Street. This pipeline could potentially be used to supply the project with recycled or imported water (if supplies were to be available) in the future, although it would require the construction of an approximately 4,000-foot pipeline to connect to the basin.

The following items should be considered before moving forward with this project:
 Availability of the site for use and coordination with flood control needs;  Surface water quality;
 Water infiltration potential;
 Deep percolation potential;
 Availability of imported water to augment surface runoff;  Subsurface conditions; and
 The clogging potential of surface soils with local runoff.

5.3.3.2 Cienega and Fairview
The Cienega and Fairview sites are adjacent, thus conditions are essentially the same and described together. Preference between the two sites would be based on political, engineering, environmental, and operational factors.

The Cienega and Fairview sites are located in the Canyon Management Zone. Fairview was first used in the early 1990s by LHMWD. LHMWD cut basins near the riverbed and placed a diversion dam in the river. Water was diverted into the basins during the rainy season, typically the 1st quarter of the year. Future use of Fairview, potentially by LHMWD and/or EMWD, would likely involve an expansion of the basin area. Water would be supplied from the river during periods of increased flow, typically January through March. Imported water could also be used if water becomes available and the infrastructure could be built. Infiltration rates are considered high based on monitoring well responses during LHMWD’s use, a study by EMWD at the Cienega blowoff pond, and the prevalence of coarse-sand riverbed deposits. 108 Hemet/San Jacinto Groundwater Management Area
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Projected Water Demands and Future Plan Phases
Potential problems for development of the project include San Bernardino Kangaroo Rat habitat, water rights, and limited available underground storage.

5.3.3.3 Bautista Creek along Florida Avenue
Bautista along Florida is located along the boundary between Upper Pressure and Canyon Management Zones. There is an existing recharge site located along the west side of Bautista Creek. The creek was placed in a concrete channel in the 1970s and 1980s, reducing recharge to the aquifer system. The current recharge facility was installed in the 1960s and consists of 3 ponds located along the creek. The three ponds cover approximately 15–20 acres. Future use of the site could include increasing the pond area through expansion to the north and increasing the supply of water to the ponds. Water for the existing project is provided by a turnout that captures agricultural runoff of acceptable quality from Bautista Creek. In general, creek water is not diverted into the ponds. Currently, approximately 200-300 AFY is recharged. Future recharge activities could take advantage of the nearby imported (State Project Water) raw water line on Cedar Avenue. Percolation rates at the site are considered reasonable based on field observations of surface sediments.

5.3.3.4 Salt Creek between Lyon Avenue and State Street Two potential sites are identified along Salt Creek for a recharge project. One site, State Street Basin, is at the State Street crossing of Salt Creek; a second site, Lyon Basin, is downstream of State Street, near Lyon Avenue. Both sites are located in Hemet South Management Zone.

Lyon Basin is the preferred location and is planned to be approximately 40 acres in size and approximately 5 feet deep, resulting in a maximum storage volume of 200 AF. The volume of the State Street Basin would likely be similar to that of the Lyon Basin. Both sites would initially use storm runoff for recharge purposes. Recharge water to both sites would be conveyed to the site via Salt Creek. It is estimated that five storm events per year could each fill the Lyon Basin, resulting in delivery of approximately 1000 AF/year for recharge. Anticipated future development of the watershed will likely increase the amount of available runoff. The State Street site would likely have slightly lower volumes due to its upstream location. Due to limited upstream development, water quality is anticipated to be good.

Potential problems for development of the project include water rights, relatively shallow depth to water and relatively shallow depth to bedrock that may limit the amount and rates of recharge at the sites.
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Projected Water Demands and Future Plan Phases

5.3.3.5 Little Valley
Little Valley is located in Hemet South Management Zone. Previously in a pilot project, water was supplied over 2 or 3 years via a LHMWD flume to the area. Water for the recharge basin would be provided by local surface runoff, the LHMWD flume, or from imported water.

Infiltration testing in the past has shown rates between 0.6 and 1.4 ft/day in the central part of the valley and 2.0 and 4.6 ft/day in the eastern part of the valley (Rees, 1994).

The following items should be considered before moving forward with this project:
 Potential environmental constraints including possible archeological sites; and  Shallow depth to bedrock may limit the amount and rate of recharge at the site.

5.3.3.6 Bautista Flood Control Ponds
The Bautista Flood Control Ponds are located in the Upper Pressure Management Zone, very close to the boundary with the Hemet South Management Zone.

The existing ponds are owned and operated by RCFC&WCD and are comprised of a debris dam that creates the 49-acre pond. Future use of the site, apart from continued flood control, would likely be for water harvesting.

5.3.4 IN-LIEU PROJECTS
In-lieu recharge projects involve reducing the usage of groundwater and substituting it with available imported, surface, or recycled water. Successful projects require water users whose needs coincide with the availability and quality of the alternate water supply. The Plan supports the use of quality direct recharge projects.

5.3.4.1 Raw Water In-Lieu Projects
Imported raw water is available from MWD and provides opportunities for in-lieu recharge projects for agricultural users or landscape irrigation. Raw water is available from the State Water Project via EM-14 and from the Colorado River Aqueduct via EM-1. Proximity to these connections is an important factor for keeping costs low for in-lieu projects. One hurdle for such projects is that the period when there is the most availability of raw water, winter, coincides with the period of lowest demand for most agricultural users. Another hurdle is the need for blending the raw water with higher quality groundwater supplies to meet the needs of some of the more sensitive users, such as dairies.
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Projected Water Demands and Future Plan Phases

5.3.4.2 Recycled Water In-Lieu Projects
Recycled water is a reliable source of water year round and offers an opportunity for in-lieu use.

Public perception generally limits the usage of recycled water to agricultural and landscape irrigation uses. The nearest source of recycled water is the San Jacinto Valley Regional Water Reclamation Facility. Proximity to this source is an important factor for keeping costs low for in-lieu projects.

One project already in the planning stages would deliver between 3,500 and 8,000 AFY of recycled water to Rancho Casa Loma and the Scott Brothers Dairy, both located roughly between Ramona Expressway and Gilman Springs Road and between Sanderson Avenue and Bridge Street in the northwestern-most portion of the Upper Pressure and Hemet North Management Zones. The delivered recycled water would coincide with an equivalent reduction in groundwater pumping by both Rancho Casa Loma and Scott Brothers Dairy. Details of the project include construction of approximately 13,000 linear feet of 24-inch pipeline, and acquisition of property in fee title and easement. Project costs would be split between the Public Agencies based on the pro-rata share of proposed production rights. Agreements with Rancho Casa Loma and the Scott Brothers Dairy would set limits on groundwater production and provide for payment of a portion of the O&M costs.

5.3.4.3 Hemet-Simpson Conjunctive Use Project
Currently MWD delivers treated water from Colorado River and State Water Project to its wholesale customers using the Skinner Water Treatment Plant. Although the Skinner plant is at full capacity, during wet years there appears to be excess water available from the plant for other potential wholesale customers.

The Simpson pump station is currently capable of pumping water to both the west and east.

The treated water available from the Skinner plant would be used by customers such as the City of Hemet in lieu of groundwater pumping. The Simpson pump station has a capacity of approximately 14.5 cfs.

The following issues and constraints should be evaluated for this project:
 Quantity and timing of water available from the Skinner Plant;  Quality of Skinner Plant water in relation to the groundwater quality used by customers such as City of Hemet, and any blending issues;  Use of chlorinated water from Skinner Plant versus well water that does not contain chlorine;
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Projected Water Demands and Future Plan Phases
 Transmission pipeline from Skinner line to the Simpson pump station and from Simpson pump station to local distribution system;
 Connections to the local distribution system and their impacts on the distribution system pressure zones; and
 Cost of MWD water and the cost distribution of such delivery.

5.3.4.4 Hemet Water Filtration Plant
Availability of treated imported water for distribution, in-lieu of groundwater production, has become a significant source for reducing stress on the groundwater system. One of the limiting factors in the substitution of imported water for groundwater is the ability to treat the imported water, which requires more treatment than groundwater. To allow for increased use of imported water, EMWD is building the 10 mgd (11,000 AFY) Hemet Water Filtration Plant near the intersection of Commonwealth Avenue and Kirby Street in Hemet. The plant will utilize State Water Project supplies.
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14.B.

SECTION 6 GROUNDWATER RIGHTS
The purpose of this Section is to document the background and settings in establishing the groundwater production rights for each Public Agency. The Base Production Rights and the method for determining Adjusted Production Rights have been established in a collaborative manner among the agencies, and have been the basis for the distribution of costs in a number of occasions during the development of the Plan.

6.1 PUBLIC AGENCIES BASE PRODUCTION RIGHTS

6.1.1 GENERAL
Together, the Public Agencies agreed upon some basic principles as a basis for allocating Base Production Rights. The base period for documenting actual pumping was determined to be calendar years 1995 through 1999. Figure 6.1 shows the average annual groundwater production by each Public Agency for 1995 – 1999. It was also recognized that, as a result of various operational activities of the Public Agencies, several adjustments would need to be made to the raw pumping data for 1995-1999. It was ultimately agreed to finalize all appropriate adjustments and to make one comprehensive adjustment to each Public Agency’s raw 1995-1999 recorded pumping.
0 2,000
4,000
6,000
8,000
10,000
12,000
14,000
16,000
EMWD LHMWD Hemet San Jacinto
Entity
Average Production (AFY)
Avg Production
Figure 6.1 Average Annual Groundwater Production, 1995 - 1999 113 Hemet/San Jacinto Groundwater Management Area
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Groundwater Rights
The operational activities that impacted groundwater resources, and therefore were used to make appropriate adjustments to raw 1995-1999 pumping data, include:
 Recharge Activities;
 MWD San Jacinto Tunnel Seepage;
 Fruitvale Entitlement Water Sold by EMWD to LHMWD, City of Hemet and City of San Jacinto;
 River Diversions;
 Conveyance Water Deliveries; and
 Other Considerations.

The Fruitvale Entitlement allocation amount was determined to be a total of 597 acre-feet for LHMWD, and Cities of Hemet and San Jacinto. The Tunnel Seepage allocation amount was determined to be 1,800 AFY, and the river diversions were determined to be 3,635 AFY for proration to the four agencies. The Public Agencies have, therefore, been assigned the pro-rata shares of Base Production Rights as shown in Table 6.1:

Table 6.1 Base Production Rights
Public Agency Base Production Rights
(AFY)
Base Production Rights
(Percent)
EMWD 10,869 33.7%
LHMWD 11,063 34.2%
City of Hemet 6,320 19.6%
City of San Jacinto 4,031 12.5%
Total 32,283 100 %
The details of the Public Agencies Base Production Right, with their corresponding adjustments, are described below:

6.1.2 EMWD BASE PRODUCTION RIGHTS
For EMWD, the 1995-1999 actual average annual pumping was determined to be 15,166 AFY.

After consideration of all appropriate adjustments, it was determined that EMWD’s Base Production Right would include a deduction of 2,497 acre-feet for conveyance water and an additional net deduction of 1,800 acre-feet for other operational activities, including tunnel seepage, export, and Fruitvale Entitlement water sales. Therefore, EMWD’s Base Production Right was set at 10,869 AFY.
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Groundwater Rights

6.1.3 LHMWD BASE PRODUCTION RIGHTS
For LHMWD, the 1995-1999 actual average annual pumping was determined to be 11,063 AFY.

There were no net adjustments for LHMWD as their credit for the Fruitvale entitlement water purchase tunnel seepage was deemed to be equivalent to their surface water diversion. Thus, the Base Production Right for LHMWD is set to 11,063 AFY.

6.1.4 CITY OF HEMET BASE PRODUCTION RIGHTS
For the City of Hemet, the 1995-1999 actual average annual pumping was determined to be 5,420 AFY. After consideration of all appropriate adjustments, it was agreed that the City of Hemet’s Base Production Right would include an additional 900 AFY pumping right to account for Fruitvale Entitlement water purchase tunnel seepage credit, and surface diversion water.

Therefore, the City of Hemet’s Base Production Right was set at 6,320 AFY.

6.1.5 CITY OF SAN JACINTO BASE PRODUCTION RIGHTS
For the City of San Jacinto, the 1995-1999 actual average annual pumping was determined to be 2,631 AFY. However, review of the city’s historic pumping showed the 1995-1999 base period was not as representative as other historic pumping periods. Therefore, it was agreed for the City of San Jacinto to receive an additional 500 AFY of pumping rights. In addition, after consideration of all other appropriate adjustments, it was determined that San Jacinto’s Base Production Right would include an additional 900 AFY pumping right to account for Fruitvale Entitlement water purchase tunnel seepage credit and surface diversion water. Therefore, the City of San Jacinto’s Base Production Right was set at 4,031 AFY.

6.2 PRIVATE WATER PRODUCER’S PRODUCTION RIGHTS

6.2.1 GENERAL
Development of the Hemet-San Jacinto Water Management Plan recognizes the rights of the overlying pumpers to pump and beneficially use needed groundwater. The overlying pumpers within the management area include Private Water Producers (and the Soboba Band of Luiseño Indians, discussed later). In recognition of the Private Water Producers’ overlying rights, the management plan does not adversely impact or affect these rights and uses that are consistent with historical uses.
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Groundwater Rights
The Plan provides for the Private Water Producers to be Non-participants, Class A Participants, or Class B Participants. For Non-participants, the private producer(s) may elect to not participate and/or not acknowledge the Plan’s existence. Non-participants are free to continue their past practices of pumping groundwater for beneficial uses according to state law. Nonparticipants are also excluded from future participation in the Plan. Class A and Class B Participants are described below.

6.2.2 CLASS A PRODUCTION RIGHTS
Class A Participants in the Plan have agreed to cooperate with the administrative and pumping accounting portions of the Plan. While historic pumping and beneficial uses may continue, the Class A Participants’ pumping facilities are subject to metering, testing, and water level and water quality sampling at no cost to the owner. This information is valuable for successful implementation of the Plan. Class A participants are eligible to convert to Class B Participant status during the first three years of formal Plan implementation (Entry of the Judgment), with the payment of all past assessments (without interest) that would have been incurred as a Class B Participant.

6.2.3 CLASS B PRODUCTION RIGHTS
Class B Participants become participants to the Plan and have their water rights determined.

The annual Base Production Right shall be determined based upon the average annual production from 1995 to 1999, less any amount of water that had been used on land that was developed for non-agricultural purposes after 1999, which is the Participant’s Base Production Right. The Class B Participant shall pay Replenishment Water Assessments for pumping in excess of the individual Base Production Right. Class B Participants are not subject to Administrative Assessments, and until conversion to a Public Agency, not subject to reduction in Safe Yield. Class B Participants may sell or lease unused groundwater to the Watermaster or one of the Public Agencies, under terms and conditions approved by the Watermaster. Upon conversion of a Class B Participant’s land from agricultural to a use that requires water service from a Public Agency, the Public Agency shall credit, to the extent legally permissible, the Class B Participant’s Base Production Right, adjusted pursuant to certain reductions, against any requirement then in effect for any water supply assessment requirements, or against any fees associated with water supply that the Public Agency may then have in effect. The Public Agency serving the converted land shall receive a credit added to its Base Production Right as set forth in the Judgment. Class B Participants to the Plan have also agreed to participate in the groundwater monitoring and pumping accounting portion of the Plan, at no cost to the owner. 116 Hemet/San Jacinto Groundwater Management Area
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14.B.

Groundwater Rights

6.3 SOBOBA TRIBE WATER RIGHTS
Section 8 of this document provides a detailed description of the Soboba Indian Tribe water rights.
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Groundwater Rights
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14.B.

SECTION 7 SURFACE WATER RIGHTS
This Section provides a description of the surface water rights and licenses held by LHMWD and EMWD. The contents of this Section are provided for general information and documentation of the surface water rights only; such rights are not affected by the Stipulated Judgment or this Plan.

7.1 LHMWD’S DIVERSION RIGHTS
LHMWD holds pre-1914 rights to divert and store water in Lake Hemet, and to divert water from Strawberry Creek, and from the North and South Forks of the San Jacinto River (See Figure 7.1). These rights have been acquired as the successor-in-interest to rights established by the Fairview Land and Water Company, the Lake Hemet Company, the Lake Hemet Water Company, the Florida Water Company, Charles Thomas, H. M. Johnston, E. L. Mayberry, W. F.

Whittier, William B. and Mary Webster, and others.

7.1.1 LAKE HEMET
Construction of Lake Hemet Dam began in 1889 and was completed in 1895. The reservoir is located in Township 6S, Range 3E, Sections 7 and 8. Water rights for the diversion and storage of water are based on actual use and upon at least these Notices of Appropriation filed on November 18, 1884 in Book 1 of Water Claims, page 38; on January 19, 1885 in Book 1 of Water Claims, page 47; on December 23, 1885 in Book 1 of Water Claims, page 115; on April 7, 1886 in Book 1 of Water Claims, page 134; and on October 18, 1890 in Book 2 of Water Claims, page 61.

The reservoir impounds water from Hurkey Creek and the South Fork of the San Joaquin River, and has a capacity of 12,775 acre-feet. Releases from the reservoir are discharged into the South Fork of the San Jacinto River.

7.1.2 SOUTH FORK OF THE SAN JACINTO RIVER
This diversion site is located about a quarter of a mile upstream of the river’s confluence with Strawberry Creek. A wooden diversion dam was originally constructed in 1888, but later replaced with a concrete diversion dam, taking water through a tunnel on the right bank of the stream into a 30-inch pipeline. Water rights are based on actual use and upon at least these Notices of Appropriation filed on June 6, 1885 in Book 1 of Water Claims, page 61; on August 11, 1886 in Book 1 of Water Claims, page 160; and on the Judgment entered 119 Hemet/San Jacinto Groundwater Management Area
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14.B.

#
#
#
%
#
Grant
Avenue
Diversion
Lake Hemet
Diversion
Strawberry
Creek
Diversion
South Fork
Diversion
North Fork
Diversion
·2|}þ43
·|}þ74
Legend
% EMWD Diversion Location*
# LHMWD Diversion Location**
Major Watercourses
Lakes and Reservoirs
Major Roads
Management Area
October 2007
Hemet / San Jacinto Water Management Plan
Location of Surface Water Diversions
Figure 7.1
0 0.5 1
Miles
±
*Source: EMWD
**Source: LHMWD
Indian
Creek
North Fork
San Jacinto
River
South Fork San
Jacinto River
Strawberry
Creek
Bautista
Creek
Poppet
Creek
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14.B.

Surface Water Rights
November 24, 1894 in the case of Florida Water Company v. Mary Webster, et al., No. 169, Riverside Superior Court.

7.1.3 NORTH FORK OF THE SAN JACINTO RIVER
This diversion site is now located on the North Fork of the San Jacinto River near the “Falls” in Section 17, T5S, R2E. The original facilities consisted of a small rock dam and a 10-inch sheet iron pipe constructed in about 1887. Current facilities, constructed in 1969-1970, consist of a concrete diversion dam, concrete intake and control structure, and 24-inch steel pipeline. Water rights are based on actual use and upon at least these Notices of Appropriation filed on September 14, 1886 in Book 1 of Water Claims, page 173; on May 19, 1897 in Book 1 of Water Claims, page 159; and on the Judgment described above.

7.1.4 STRAWBERRY CREEK
LHMWD’s diversion site on Strawberry Creek is located in Section 28, T5S, R2E, about 1,300 feet upstream of its confluence with the South Fork of the San Jacinto River. Original construction of a concrete diversion dam and flume, carrying the water over the South Fork and into the main water line, occurred in about 1905. Current facilities consist of a concrete diversion dam, intake structure, and 28-inch pipeline. Water rights are based upon actual use and at least on these Notices of Appropriation filed on January 27, 1885 in Book 1 of Water Claims, page 49; on August 11, 1886 in Book 1 of Water Claims, page 160; and on deeds recorded July 24, 1885 in Book 51, page 145; on August 25, 1886 in Book 64, page 223; on February 21, 1887 in Book 73, page 235; on April 21, 1887 in Book 79, page 264; on April 27, 1887 in Book 79, page 266; and on the Judgment described above.

7.2 EMWD’S DIVERSION RIGHTS
EMWD holds a license to divert water from the San Jacinto River (see Appendix G). EMWD currently does not divert surface water for direct use, but recharges the water, when available, into the aquifer to augment groundwater supplies. Thus, the diversion is not directly part of EMWD’s water supply. However, it plays an indirect role in groundwater resources.

Information on these diversions is presented here.

EMWD’s recharge of surface water from the San Jacinto River to the Canyon Management Zone takes place at EMWD’s Grant Avenue Ponds in the Valle Vista area (See Figure 7.1). An application for a permit to appropriate water from the San Jacinto River and Indian Creek, Application 924, was filed on February 14, 1918 by the Citizens Water Company. Permit 468 121 Hemet/San Jacinto Groundwater Management Area
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Surface Water Rights
was subsequently approved on August 15, 1918. On November 23, 1920, the filing was assigned to the FMWC as the successor-in-interest to the Citizens Water Company. Upon its 1971 acquisition of the FMWC, EMWD became the successor-in-interest to the filing.

Based on Application 924 and Permit 468, the State Water Resources Control Board issued License No. 10667 for the Diversion and Use of Water to EMWD on June 8, 1976. This license, still held by EMWD, allows for the diversion, underground storage by spreading, and subsequent extraction and beneficial use of 5,760 AFY of San Jacinto River water to be collected from November 1 of each year to June 30 of the succeeding year at a rate of 41 cfs. Additionally, the rate of diversion may be increased to a maximum of 100 cfs provided that the total quantity in any 30-day period does not exceed 2,442 AF.
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14.B.

SECTION 8 SOBOBA TRIBE SETTLEMENT REQUIREMENTS

8.1 ORIGINAL SOBOBA CLAIM
In 1995 the Soboba Tribe filed claims against EMWD and LHMWD for an alleged infringement of their water rights, and for damages in the sum of $70 million related to the alleged historical interference with the Tribe’s rights and the unauthorized use of its water. EMWD and LHMWD denied any such interference or wrongful use of Tribal water, but agreed to negotiations to determine the water rights of the Tribe.

8.1.1 EARLY NEGOTIATIONS
Negotiations with the Tribe began in 1995 and in time involved the active participation of the United States.

8.1.2 UNITED STATES SETTLEMENT PROPOSAL
In 1998, the United States proposed a settlement whereby the Tribal Water Right would be determined to be 9,000 AFY, and the Federal government would provide a supply of 7,500AFY.

Subsequently this proposal proved not to be feasible.

8.1.3 TRIBAL CLAIM AGAINST MWD
In 2000 the MWD was brought into the dispute when the Tribe filed suit against MWD in the U.S. District Court in Los Angeles, Case No. 00-04208 (GAF) (MANx) (“Los Angeles case”). The complaint alleged that the MWD tunnel drilled through Mt. San Jacinto in the 1930’s had dried up springs on the Reservation and otherwise interfered with the Tribe’s water supply.

8.1.4 MWD’S CROSS COMPLAINT
MWD brought EMWD into the Los Angeles action based upon an indemnity agreement signed by EMWD when the District was annexed to MWD, and in return for seepage water that continued to flow into the San Jacinto tunnel.
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Soboba Tribe Settlement Requirements

8.1.5 FINAL NEGOTIATIONS
After lengthy negotiations among the Tribe, United States, EMWD, LHMWD and MWD, the parties reached an Agreement in 2004, subject to approval of Congress.

8.1.6 STATUS OF CONGRESSIONAL APPROVAL
The Agreement has not yet been approved by Congress, and it expires if such approval is not obtained by December 31, 2007.

8.2 FRAMEWORK OF THE SETTLEMENT AGREEMENT
The Agreement determines the water rights of the Tribe, and settles all claims among the parties, including those made in the Los Angeles case. The Agreement will be incorporated into a Stipulated Judgment in the Los Angeles case, and made subject to the continuing jurisdiction of the Court.

8.3 TRIBAL WATER RIGHT
Under the Agreement, the Tribe has a prior and paramount right, superior to all others, to pump 9,000 acre-feet annually from the Canyon Sub-basin and the Intake portion of the Upper Pressure Sub-basin for any use on the Reservation, and on lands now owned or hereafter acquired by the Tribe contiguous to the Reservation or within the above-mentioned Sub-basins.

The Tribe’s right is subject to an agreement to limit its pumping according to a yearly schedule, with a maximum of 4,100 AFY, for 50 years after the effective date of the Agreement.

8.4 PAYMENTS TO THE TRIBE
The United States agrees to pay $11 million to the Tribe, and EMWD and LHMWD are obligated to pay $17 million to the Tribe.

8.5 FUNDS RECEIVED BY THE LOCAL AGENCIES
The United States agrees to contribute to EMWD, on behalf of the participants in this Water Management Plan, the sum of $10 million for construction and operation of recharge facilities to accommodate deliveries of Imported Water.
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14.B.

Soboba Tribe Settlement Requirements

8.6 IMPORTED WATER
MWD agrees to provide an average supply of 7,500 AFY of Imported Water to recharge the Canyon Management Zone and Intake portion of the Upper Pressure Management Zone, at untreated replenishment rates, until 2035, and to negotiate in good faith for an extension of the supply for a total of 50 years after the effective date of the Agreement.

8.6.1 MWD STORAGE RIGHT
The local agencies are obligated to provide groundwater recharge facilities to accommodate a flow rate of 42 cfs and to store up to 40,000 acre feet of Imported Water.

8.6.2 USE OF MWD SUPPLY
The supply of Imported Water provided by MWD is to supply water for the Tribe, and to reduce overdraft. Water not used by the Tribe is available for use by the participants in the Water Management Plan, pursuant to the terms hereof.

8.7 WATER QUALITY REQUIREMENTS
The Agreement provides that all water recharged shall conform to all applicable State water quality regulations and recharge in the Canyon Sub-basin and shall not exceed Federal or State primary or secondary drinking water quality standards (except for turbidity, color or coliform bacteria), nor 0.3 mg/l boron, or 0.05 mg/l lithium.

8.8 PROPERTY TRANSACTIONS
EMWD shall convey to the Tribe approximately 106 acres of land at Domenigoni Parkway and Highway 79. MWD shall convey to the Tribe approximately 21.7 acres of land. LHMWD shall make available for environmental mitigation purposes approximately 12 acres in the San Jacinto River bed. The Tribe shall make available up to 98 acres of land for habitat preservation and/or environmental mitigation in connection with the recharge facilities.

8.9 APPROVAL OF WATER MANAGEMENT PLAN
The Agreement provides that EMWD and LHMWD, with the cooperation of other groundwater producers, shall develop and implement a Water Management Plan for the Canyon 125 Hemet/San Jacinto Groundwater Management Area
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14.B.

Soboba Tribe Settlement Requirements
Management Zone and Intake portion of the Upper Pressure Management Zone that will address the current overdraft, and recognize and take into account the Tribal Water Right. This Plan is intended to meet such requirements of the Agreement, and is subject to the approval of the Soboba Tribe and the United States. No implementation or subsequent modification of this Plan shall threaten or adversely affect the rights of the Tribe under the Agreement, and the Tribe and the United States shall have the right under the continuing jurisdiction of the Court in the Los Angeles case to litigate any such issue.
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14.B.

SECTION 9 INSTITUTIONAL PLAN

9.1 PURPOSE
The purpose of the Watermaster is to implement the Water Management Plan (The Plan) as embodied in the Stipulated Judgment (JUDGMENT) in Eastern Municipal Water District v.

Lake Hemet Municipal Water District, et al.; said implementation may be by Watermaster actions alone, actions undertaken through or in conjunction with one or more Public Agency Members or through a Joint Powers Authority (JPA) composed of some or all of its Public Agency Members.

9.2 WATERMASTER

9.2.1 COMPOSITION
The Watermaster Governing Board will consist of one (1) elected official representing each of the Public Agencies, namely, EMWD, LHMWD, and the Cities of Hemet and San Jacinto (collectively, Public Agencies), and one (1) representative selected by the Class A and Class B private groundwater producers (Private Water Producers).

9.2.2 TERMS OF OFFICE
Each member of the Watermaster shall serve until replaced by the Public Agency or Private Water Producers that made the original appointment.

9.2.3 REMOVAL AND REPLACEMENT
Any Watermaster member may be removed and replaced by the same procedure used in his or her appointment.

9.2.4 VOTING
Each member of the Watermaster shall have one (1) vote. All actions by the Watermaster shall require three (3) affirmative votes, except actions in the following matters that shall require four (4) affirmative votes:
 Any change sought in the form of governance;
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Institutional Plan
 Any change in voting requirements;
 Establishing, levying, increasing or decreasing all assessment amounts;  Determining the extent of overdraft and quantifying safe yield;  Determining Adjusted Production Rights;
 Decisions regarding the financing of supplemental water or facilities, other than any financing provisions included in the Judgment;
 Decisions regarding ownership of facilities, other than ownership of the Phase I facilities (described in Section 3.2.2.1), which facilities shall be owned by EMWD, subject to a right of use by those parties participating in the financing thereof;  Policies for the management of the Management Area;
 Any decision that involves a substantial commitment by the Watermaster, including any contracts for conserved water;
 Retaining the services of legal counsel or Advisor; and  Adoption or amendment of an annual budget.

9.3 RULES AND REGULATIONS
The Watermaster may make such rules and regulations as may be necessary for the implementation of the Water Management Plan and Judgment, and for its own operations and procedures, subject to Court approval.

9.4 MEETINGS
The meetings of the Watermaster and standing committees will be subject to those provisions of the California Government Code known as the Brown Act (also popularly known as the Open Meeting Laws).

9.5 WATERMASTER ORGANIZATION
In carrying out its development and implementation responsibilities, the Watermaster may hire full-time or part-time personnel, such as managers, engineers, attorneys, hydrologists, geologists, accountants, operators, secretaries, clerical or others; may retain outside consultants on a full-time, part-time, or as-needed basis; and may contract with other agencies to perform some or all of the development and implementation tasks.

The Watermaster shall retain the services of an independent attorney or law firm to act as the Watermaster’s legal counsel.
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The Watermaster shall retain the services of a qualified independent individual or engineering firm with appropriate experience in hydrology to serve as Advisor to the Watermaster. The Advisor shall assist the Watermaster in the performance of the Watermaster’s responsibilities as follows:
 Provide advice to the Watermaster on all matters within the authority and jurisdiction of the Watermaster;
 Provide recommendations for action to the Watermaster on all matters within the authority and jurisdiction of the Watermaster;
 Evaluate proposals for projects and/or recommendations for action received from members of the Watermaster regarding matters within the authority and jurisdiction of the Watermaster;
 Propose and/or evaluate contracts and other agreements to be entered into by the Watermaster necessary to the performance of its responsibilities;  To administer all contracts and agreements entered into by the Watermaster;  Assist the Watermaster in evaluating and analyzing data, the collection of which is required under the Judgment and/or Water Management Plan;  Coordinate the evaluation and analyses of data, proposals, projects, and recommendations by the TC with members of the Watermaster and other consultants of the Watermaster;
 Serve as the Chairman of the TC; and
 Perform such other services, and take such actions, as may be approved by the Watermaster, that are necessary to implement and execute the directions and policies of the Watermaster.

The Watermaster retains the authority to assign or contract the performance of any task or function necessary to consider or perform any matter within the authority and jurisdiction of the Watermaster to any member of the Watermaster, the TC, or any other independent engineering firm or qualified individual. Such assignment or contract shall be coordinated and administered by the Advisor.

As used herein, the term independent means that the Consultant’s or Advisor’s representation of the Watermaster does not create any actual or potential conflict of interest between the Consultant or Advisor and any other member entity under applicable California statute, regulation, or court decision, or under the common law. Nothing in this definition shall prohibit the Watermaster and affected entity, after appropriate vote, from waiving such conflict in writing.
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9.6 GENERAL DUTIES
The general duties of the Watermaster in order to implement the Judgment fall into three categories, as follows:

9.6.1 POLICY
The Watermaster is responsible for the administration of the Judgment and for the development of policies necessary to carry out the implementation of the Water Management Plan, and for additions and modifications thereof.

9.6.2 WATER MANAGEMENT PLAN IMPLEMENTATION
The Watermaster shall implement a water management plan; its responsibilities in that regard include the following:
 Calculating and making determinations regarding the following: (i) safe yield of the Management Area; (ii) each member’s share of safe yield; (iii) necessary reductions in each member’s Base Production Right to ensure production ultimately equals safe yield; (iv) unused storage capacity which may be used for put and take operations of recycled or imported water; and (v) whether replenishment of exported water is accomplished with an appropriate amount of similar or better quality water.
 Approving projects to be undertaken by the Watermaster in collaboration with member entities as proposed by members of the Watermaster or by the Advisor.  Providing for the recharge of the Management Area. This includes:
(i) implementing a replenishment program for the Management Area; (ii) acquisition of supplemental water supplies (imported, recycled, and Soboba Tribe water); and (iii) providing for the construction and operation of all necessary facilities (including surface and sub-surface percolation and injection facilities).
 Determining the amount of, and levying, billing, and collecting the administrative and replenishment assessments.
 Budgeting and appropriating funds collected by or on behalf of the Watermaster and paying, or authorizing the payment of, costs and expenses of the Watermaster consistent with the Judgment and Water Management Plan.  Initiating and performing such planning and study activities as may be necessary to implement the Judgment and Water Management Plan, including, but not limited to, preparation of a Watermaster’s Annual Report. 130 Hemet/San Jacinto Groundwater Management Area
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 Initiating necessary conservation and drought management measures, and developing water conservation agreements with the Private Water Producers and/or Soboba Tribe for local conservation measures.
 Identifying and participating in the in-lieu replenishment projects.  Performing all other tasks and taking all other actions as may be necessary to carry out the purpose and intent of the Judgment and the Plan.

9.6.3 TECHNICAL OVERSIGHT

9.6.3.1 Technical Committee Composition
The Stipulated Judgment provides for the operation of a TC, consisting of representatives named in a written designation by EMWD, LHMWD, the Cities of Hemet and San Jacinto, and the Private Water Producers (as one entity). The representative(s) of an entity may be changed by that entity by written notice of the change to the Watermaster.

9.6.3.2 Technical Committee Purpose
The TC will provide such technical assistance as the Watermaster may request and should make recommendations to the Advisor and to the Watermaster on all matters requiring four votes for Watermaster action as outlined in the Voting section above, and on such other matters as requested by the Watermaster. The TC members shall also keep their respective City Councils and Boards of Directors of the Public Agency parties and the Private Water Producers fully informed about the implementation of the Plan.

9.6.3.3 Technical Committee Chairperson
The Advisor will act as the TC’s Chairperson and fulfill all the necessary administrative functions required on behalf of the TC.

9.6.3.4 Technical Committee Costs
Costs incurred by individual TC members are the responsibility of the entity appointing that member, and Watermaster funds cannot be used to cover the costs and expenses incurred as a result of the TC activities and functions.
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9.7 WATERMASTER INTERACTION WITH EMWD

9.7.1 CONTRACT FOR SERVICES
The Watermaster will contract with EMWD to provide the following services:
 Collection and maintenance of all production, water level, water quality, and other technical data necessary under or required by the Water Management Plan and the transmittal of such data to the Watermaster, its Advisor, and the TC as directed by the Watermaster; the foregoing shall not restrict the Watermaster from entering into other agreements with other members of the Watermaster and/or private firms and individuals for the collection of data.  Obtaining imported water from MWD or other sources as requested by the Watermaster for replenishment or direct delivery; the foregoing shall not restrict the Watermaster’s ability to enter into other agreements with other members of the Watermaster and/or private firms and individuals for the purchase and delivery of imported and/or supplemental water.
 Construct and operate the Phase I facilities (existing EMWD facilities, expansions thereof, and newly constructed facilities) in a manner consistent with the Water Management Plan.
 Perform the accounting functions necessary under the Judgment, i.e., the levy, billing, and collection of all assessments provided for under the Judgment; the payment of costs and expenses of the Watermaster; and related and required accounting and related functions. All funds collected shall be held in a segregated account. All expenses and disbursements shall be separately accounted for. The foregoing shall not restrict the Watermaster from entering into other agreements with other members of the Watermaster and/or private firms and individuals to perform some or all of the accounting functions.

9.7.2 FINANCIAL RESPONSIBILITIES
EMWD will establish restricted accounts and hold all funds collected on behalf of the Watermaster separate from other EMWD funds. All expenditures, encumbrances, and use of funds from these accounts are subject to Watermaster authorization and will be limited to activities related to the Plan. EMWD will transmit periodic reports regarding its financial activities to the Advisor, including annual reporting summarizing the preceding fiscal year financial activities for the approval of the Advisor and the Watermaster. 132 Hemet/San Jacinto Groundwater Management Area
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SECTION 10 FINANCIAL PLAN

10.1 ANNUAL BUDGET
The Advisor shall prepare an Annual Budget for review, approval, and adoption by the Watermaster. This Budget shall identify each Public Agency member’s financial obligations and assessments and a description of budgeted expenditures, including:
 Replenishment water purchase;
 Operation and maintenance;
 Data collection and evaluation;
 Plan implementation administration;
 Project planning and reporting;
 Billing and assessment collection;
 Capital facilities financial obligations; and
 Preparation of an Annual Audit.

10.2 OWNERSHIP OF FACILITIES
Each Public Agency will continue to own its existing capital facilities for water management.

However, in some situations, it may be necessary and/or convenient to form a JPA to finance and build specific capital facilities. Responsibility for the cost of any existing and future capital facilities of the Management Plan should be apportioned among the Public Agencies based on relative benefit to be derived by each Public Agency.

10.2.1 EXISTING FACILITIES
The existing groundwater recharge facilities in the Management Area are owned by EMWD.

The Phase I project which is an upgrade of the existing recharge facilities is defined in Section 3.2.2 of this document, and EMWD will own these upgraded facilities. However, the use of the upgraded facilities and the benefits of the low-cost MWD water deliveries through this system will be shared by all agencies based on the level of construction funding contributions for the Phase I facilities and level of participation in the Soboba Settlement financing.
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10.2.2 FUTURE PROJECTS
Any of the participating Public Agencies may propose water supply projects to the Watermaster for inclusion in the Plan. Such proposals, after evaluation by the Advisor and the TC, shall be presented to the Watermaster for approval or rejection. If the Watermaster chooses to reject the proposal, the proposing Public Agency may implement the rejected project as long as it does not significantly impact the implementation of the Plan and/or interfere with ongoing groundwater production by the Public Agencies.

10.2.3 USE OF MEMBER AGENCY ASSETS
It is the intent of the Member Agencies that their respective facilities shall be used in a manner that facilitates the implementation of the Plan, on terms that are equitable to all parties and consistent with each agency’s obligations to its customer base.

10.3 ASSESSMENTS
Public agencies participating in the Plan are subject to two different assessments:
 Administrative Assessment; and
 Replenishment Assessment.

The purpose and use of these assessment funds are described in the following two sections:

10.3.1 ADMINISTRATIVE ASSESSMENTS
Administrative Assessments will be levied on each acre-foot pumped by each Public Agency up to the agency’s Adjusted Production Right. These assessments can be used to pay costs associated with:
 Advisor’s activities and his/her administrative expenses;  Billing and assessment collection costs;
 Data collection and evaluation projects;
 Plan implementation administration, including monitoring plan, and associated salaries and overhead; and
 Project planning and reporting expenses.

Initially, the Administrative Assessment shall be Fifty Dollars ($50.00) per AF, subject to adjustment by the Watermaster.
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At the discretion of the Watermaster, any excess funds not used for the above expenditures at the end of the fiscal year can be used to purchase, deliver, and recharge the groundwater within the Management Area. These recharge waters are above and beyond groundwater replenishment waters purchased using the replenishment assessments, and should not be credited to individual Public Agencies as part of their required replenishment obligations. This shall not prohibit the development of a program or plan to provide credits for water purchased above and beyond that needed to satisfy a party’s replenishment obligation.

Subject to the Watermaster’s approval, funds may also be used to acquire and deliver water for direct use in lieu of pumping.

10.3.2 REPLENISHMENT ASSESSMENTS
Replenishment Assessments will be levied on each acre-foot of water pumped in excess of each Public Agency's or Class B Participant’s Adjusted Production Right. Replenishment Assessments will be in amounts equal to the cost of importing or acquiring supplemental water to recharge the Management Area. The component costs will include the cost of the water (including conveyance, transportation and energy costs, operations and maintenance costs, a reserve for replacement and other administrative costs). These assessments will be levied on a per AF of water in excess of each respective member’s adjusted Base Production Right. The revenue received for the replacement component shall be placed in a separate reserve fund to be used to fund the replacement cost of the existing system. New and/or expanded facilities will be financed from other resources.

10.3.3 COLLECTIONS AND ACCOUNTS
All the collected assessments and accounts associated with the Plan will be administered by the EMWD and are subject to the policies set by the Watermaster. All payments made to the Watermaster shall be maintained in a separate restricted account established by EMWD, and all accounts shall be subject to annual independent financial audits.

All revenues and assessments shall be used exclusively to acquire supplemental water for the recharge of the management Area and for the facilities and operational and administrative expenses associated with the Plan.
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10.4 PHASE I FACILITIES CONSTRUCTION AND SOBOBA

SETTLEMENT FINANCING

10.4.1 EMWD CONSTRUCTION COST
The initial facilities, Phase I, shall consist of existing EMWD facilities and expansion and additions to be constructed by EMWD at a cost currently estimated at $16.12 million less public grants totaling $5.0 million, for a net cost of $11.12 million. EMWD shall finance the construction of these facilities through a bond issue or cash payment or by combination thereof.

Each Public Agency shall be responsible for pro-rata repayment of the bonds through EMWD or reimbursement to EMWD (to the extent EMWD pays cash for said construction) based on that Agency's Base Production Right allocation percentage, i.e., 34.2% for LHMWD, 33.7% for EMWD, 19.6% for the City of Hemet, and 12.5% for the City of San Jacinto.

10.4.2 PAYMENTS TO SOBOBA TRIBE
In addition to the financing of the construction of Phase I facilities referred to in Section 10.4.1 above, the Soboba Settlement requires the payment of an additional $17 million to the Soboba Tribe in return for the right to use low cost MWD water delivered for the benefit of the Tribe but which the Tribe does not use and other unused Tribal water. The $17 million will be financed in the same manner as the construction of the initial Phase I facilities, i.e., by bond issue or cash payment by EMWD or a combination thereof. The $17 million obligation will be partially offset by a $10 million contribution by the United States toward the costs of constructing the Phase I facilities. Each Public Agency shall be responsible for pro-rata repayment of the bonds through EMWD or reimbursement to EMWD (for cash payment) based on that Agency's Base Production Right allocation percentage, as set out in Subparagraph (a) above.

10.4.2.1 Water Cost
The payment described above to the Soboba Tribe for the right to use low-cost MWD water delivered for the benefit of the Tribe but not used by the Tribe does not include the price of the water itself, which must be paid to MWD. Each Public Agency shall contractually agree with EMWD to pay its share of MWD’s price for such water that it acquires for use to EMWD to enable EMWD to pay MWD.
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10.4.3 EMWD OBLIGATION
Agreements between EMWD and each other Public Agency setting forth that Agency's financial commitment as required under Sections 10.4.1 and 10.4.2 (citation) above will be required as a condition precedent to EMWD's obligation to finance the facilities construction and the payment to the Tribe so as to establish a dedicated source of revenue for bond repayment or reimbursement, as appropriate. Said agreements shall also provide that, in return for said financial commitment, the Public Agency shall be entitled to: (1) share in the capacity of the Phase I facilities (those in existence and those to be constructed) and (2) share in the rights to the MWD water not used by the Tribe and other unused Tribal water, in each case based on the Agency's Base Production Right allocation percentage, as set out in Subparagraph (a) above.

Each agreement with EMWD shall provide for the Agency’s method of pro-rata repayment of bonds or reimbursement to EMWD, provided, however, that no Agency will be required to do so by cash payment without its consent.

10.4.4 RIGHT TO TRANSFER ENTITLEMENT TO USE FACILITIES AND/OR ENTITLEMENT TO

SHARE IN RIGHTS TO WATER NOT USED BY TRIBE
Each Public Agency shall have the right to sell, lease or otherwise transfer the rights and obligations it holds to use the Phase I facilities described in Section 10.4.1 above and/or to share in the rights to the MWD water not used by the Tribe or other water not used by the Tribe described in Sections 10.4.2 and 10.4.3 above, provided that the transferee thereof shall be bound by said obligations. The foregoing notwithstanding, the Watermaster shall have the right of first refusal regarding any such transfer proposed by a Public Agency.

10.5 FUTURE CAPITAL FACILITIES
Future facilities may be required to meet the growth needs of the Management Area, which may require that a JPA or other financing conduit be formed. In either case, each Public Agency’s contribution toward the cost of acquiring the added facilities shall be established by the Watermaster at the time such facilities will be needed. The use of such facilities shall be at the discretion of the Watermaster and be dedicated to replenishment activities. The foregoing shall not affect the right of a Public Agency to undertake a water supply project pursuant to Section 10.4.2 above.
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SECTION 11 IMPLEMENTATION PLAN
The five-member Watermaster Governing Board (Watermaster) will be composed of one elected official each from the City of Hemet, City of San Jacinto, LHMWD, and EMWD (Public Agencies) and one representative elected by the private groundwater producers (Private Water Producers). Each member of the Watermaster will have one vote and will serve until replaced by the entity (Public Agencies or the Private Water Producers) making the original appointment.

The Watermaster is responsible for administering and enforcing the provisions of the Stipulated Judgment and any subsequent instructions or orders of the Court. The implementation of the Management Plan, along with any additions or modifications as may from time to time be appropriate, and all financial matters relating to Management Plan Activities are the responsibility of the Watermaster.

This section describes how the Watermaster is expected to implement different elements of the Physical Solution outlined in the Stipulated Judgment. Information provided in this section should be used for planning purposes and is not intended to set or change any conditions imposed by the Stipulated Judgment. The timelines provided in this section should be used as guidelines and are not meant to imply any obligation to be met by the Watermaster. The Watermaster is expected to use the information provided in this section during the early years after its formation and refine, revise, or redefine the information, as it deems appropriate.

11.1 ORGANIZATION
The Watermaster will receive assistance and support from legal counsel, an Advisor, a Technical Committee (TC), and Eastern Municipal Water District (EMWD). The duties and responsibilities of each entity are outlined in subsequent sections. Figure 11.1 demonstrates the relationships between the Watermaster and its supporting entities.

Within one month of the Stipulated Judgment approval, the Private Pumpers identified as Class A and B participants are expected to develop a procedure for electing their representative. The elected officials from the Agencies and the Private Pumpers serving as the Watermaster should be identified within the first two months of Stipulated Judgment approval, and the Watermaster should conduct its first meeting at a mutually acceptable location within one month after that. 139 Hemet/San Jacinto Groundwater Management Area
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EMWD

TECHNICAL

ADVISORY

COMMITEE

ADVISOR

WATERMASTER BOARD LEGAL

COUNSEL
Management
Evaluation
Recmmendations
Purchase water from MWD
Deliver water to recharge basins
Operation and maintain facilities and systems
Other activities related to physical operations
Data / sample collection
Lab analysis and data compilation
Meter reading / billing / collection / accounting

RECHARGE OPERATIONS ADMINISTRATION AND MONITORING
Figure 11.1 Relationships between Entities
Within three months of the Watermaster’s first meeting, the Watermaster will retain the services of an independent attorney or legal firm (Legal Counsel) to provide assistance with legal matters and to provide ongoing advice and recommendations in legal areas appropriate to the Watermaster carrying out its duties
Also within three months of the Watermaster’s first meeting, the Watermaster will contract with either an independent engineering firm or a qualified individual (Advisor) experienced in hydrology to evaluate and analyze the data collected by EMWD and any conclusions based on that data, and to make recommendations to the Watermaster. The Advisor will provide general coordination between the Watermaster, the Technical Committee, and EMWD with respect to their respective functions, and will also perform such executive functions as the Watermaster may direct. The Watermaster may refer any matter it chooses to any person it may select for assistance in carrying out its duties under the Judgment.

The TC will consist of managerial and technical representatives of the Agencies and Private Water Producers. The Advisor will serve as the TC chairman. The TC will provide technical assistance at the request of the Watermaster. The TC will make recommendations to the Advisor and to the Watermaster on all matters requiring four votes for Watermaster action, which are:
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 Any change in the form of governance;
 Any change in voting requirements;
 Retaining the services of legal counsel and Advisor;
 Establishing, levying, increasing or decreasing all assessment amounts;  Adopting or amending the annual budget;
 Determining the extent of overdraft and quantifying safe yield;  Determining Adjusted Production Rights;
 Decisions regarding the financing of Supplemental Water or facilities;  Decisions regarding ownership of facilities, other than ownership of the Phase I facilities, which will be owned by EMWD, subject to a right of use by those parties participating in the Phase I financing;
 Management policies for the Management Area; and
 Any decision that involves a substantial commitment by the Watermaster, including any contracts for conserved water.

In addition, the TC will receive all Monitoring Program and associated data from EMWD for review and evaluation. The TC members are anticipated to keep the City Councils, Agency Boards of Directors, and participating Private Pumpers informed about the Watermaster activities and the Water Management Plan’s status.

Within six months of Stipulated Judgment approval, the Watermaster will prepare and adopt Rules and Regulations for its own operation as well as for the operation of the Water Management Plan and Judgment. A dispute resolution process will be included in the Rules and Regulations.

11.2 MONITORING PROGRAM IMPLEMENTATION
The Monitoring Program was initiated with the execution of the September 2003 Agreement to Develop a Groundwater Monitoring Program in the Hemet/San Jacinto Management Area between the Cities of Hemet and San Jacinto, EMWD, and LHMWD. Its purpose was to measure and monitor groundwater levels to assist in the accurate evaluation of conditions of overdraft and the evaluation of the operational safe yield in the Management Area. In addition to water levels, the program included water quality and production monitoring. The agreement for 2005 added surface water monitoring of San Jacinto River flows in conjunction with the U.S.

Geological Survey. Funded equitably among the agencies, the Monitoring Program has been managed by EMWD. The monitoring locations currently are sampled annually for quality and are measured semi-annual for water levels. The locations are presented in Figure 11.2. These 141 Hemet/San Jacinto Groundwater Management Area
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locations may be updated based on the recommendations in the annual monitoring program as discussed later in this Section.

To protect groundwater supplies, an Inactive Well Capping/Sealing Program is included in the Monitoring Programs. Under this program, an inactive well or open casing will be capped/sealed at no charge to the well owner. These wells may still be used for water level and, in some cases, water quality monitoring. Priority is given to those wells that are potentially dangerous open holes (16-18" casings) or those located in areas where flooding resulting from precipitation might carry manure, fertilizers, or other contaminants into the well.

Any Agency or well owner can provide the Watermaster or Monitoring Program personnel with the location of an unused well or open casing for consideration for the Inactive Well Capping/Sealing Program.

Under a contract with the Watermaster, EMWD will lead the Monitoring Program effort. Prior to January 1st of any given year, EMWD staff will present a proposed Monitoring Program to the Advisor. The program is anticipated to include:

1. Estimated number of wells to be monitored for groundwater levels;

2. Estimated number of wells to be sampled for water quality;

3. Number of meters to be read monthly or installed or repaired;

4. Estimated number of inactive wells to be capped;

5. Any changes or variation from the previous year’s activities; and

6. Estimated budget to include cost for the field activities and development of the annual report.

The Advisor will review, revise, approve or reject the proposed monitoring program and initiate the annual monitoring program before the end of January of each year. The annual Monitoring Program budget must be approved by the Watermaster before the end of February of each year. The Monitoring Program is run on a calendar year basis and each annual report and associated budget will reflect such a calendar year time period. 142 Hemet/San Jacinto Groundwater Management Area
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%
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San Jacinto River
Diamond Valley Lake
Lake Skinner
Hemet
San Jacinto
·|}þ79
·2|}þ43
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SWG_11070020
SWG_11070150
SWG_11069500
Legend
% Stream Gages*
Groundwater Monitoring Sites Type*
$ Water Quality Only
$ Water Level Only
$ Quality and Level
! Cities
Major Watercourses
Lakes and Reservoirs
Major Roads
Management Area
October 2007
Hemet / San Jacinto Water Management Plan
Stream Gages and Groundwater Monitoring Sites
Figure 11.2
0 0.5 1
Miles
±
*Source: EMWD

14.B.

Implementation Plan
Data to be considered for collection and inclusion in the Hemet/San Jacinto Water Management Area Annual Reports to assess the status of the basins and to monitor the responses for future management activities may include, but is not limited to:
 Groundwater level monitoring results;
 Groundwater quality monitoring results;
 Groundwater production;
 Surface water flow monitoring results;
 Surface water quality;
 Surface water diversions;
 Imported water;
 Hydrologic data (rainfall and evaporation);
 Recycled water production;
 Recycled water sales/use;
 Conveyance water;
 Water conservation measures;
 Population growth and development; and
 Land use and crop mix.

EMWD will submit the Annual Hemet/San Jacinto Water Management Area Report resulting from the Monitoring Program to the Advisor for review within four months after completion of each calendar year’s monitoring program. The Advisor will then provide the Watermaster with recommendations on how best to operate the Management Area as well as provide a proposed determination of Administrative and Replenishment Assessments for each agency based on previous year’s activities. Within the first six years, the Watermaster, with input from its Advisor and the TC, will make a determination of the safe yield of the Management Area.

Thereafter, the safe yield shall be reviewed and modified, if necessary, upon the recommendation of the TC or as the Watermaster may determine.

The Watermaster will use information provided in the Annual Hemet/San Jacinto Water Management Area Report and Advisor’s recommendations to decide on how to meet the goals for the upcoming year(s).

11.3 MANAGEMENT PLANNING TOOLS
In the future, the Watermaster may want to develop or use databases and other numerical models as planning tools. EMWD maintains a RWRD. Data from the Groundwater and Surface 144 Hemet/San Jacinto Groundwater Management Area
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