rincon del diablo municipal water district water master...

Rincon del Diablo

Municipal Water District

WATER MASTER PLAN UPDATE

June 2014

Prepared for:

Rincon del Diablo Municipal Water District 1920 North Iris Lane

Escondido, California 92026

Prepared by:

3570 Carmel Mountain Road, Suite 300 San Diego, California 92130

In Association with:

Atkins Project No.: 100015413

______________________________ Mark B. Elliott, PE Project Manager

Contents

i June 2014

Contents Acronyms ................................................................................................................................... v 1 Introduction .................................................................................................................. 1-1

1.1 Purpose .............................................................................................................. 1-1

1.2 Authorization ...................................................................................................... 1-1

1.3 Report Outline and Synopsis .............................................................................. 1-2

1.4 District Overview ................................................................................................ 1-3

1.4.1 Service Area and Governance ................................................................ 1-3

1.4.2 Existing and Projected Land Uses for ID-1 ............................................. 1-3

1.4.3 Existing and Projected Land Uses for ID-A ............................................ 1-8

2 Planning Criteria .......................................................................................................... 2-1

2.1 Purpose .............................................................................................................. 2-1

2.2 Water System Criteria Update ............................................................................ 2-1

2.3 Level of Service Criteria ..................................................................................... 2-5

3 Water Demands ............................................................................................................ 3-1

3.1 Summary ............................................................................................................ 3-1

3.1.1 Current and Projected Water Demands .................................................. 3-1

3.1.2 Per Capita Potable Use / Senate Bill X7-7 Compliance ......................... 3-3

3.2 Setting and Background ..................................................................................... 3-3

3.2.1 The Role of Demand Forecasts, and the Recalibration of Past Trends .................................................................................................... 3-3

3.2.2 Forecast Methodology ............................................................................ 3-5

3.3 Historical and Projected Water Demands........................................................... 3-6

3.3.1 Current and Projected Demands ............................................................ 3-6

3.3.2 Conservation Efficiencies / “20% by 2020” Compliance ......................... 3-6

3.3.3 Allocation of Demands for Use in the Hydraulic Network Model ............ 3-6

4 Water Supplies ............................................................................................................. 4-1

4.1 Summary ............................................................................................................ 4-1

4.1.1 Balance of Supplies and Demands / New Local Supplies ...................... 4-1

4.1.2 Water Supply Reliability .......................................................................... 4-2

4.2 Existing Supply Sources ..................................................................................... 4-3

4.2.1 Existing Conditions and Supply Reliability Challenges ........................... 4-3

4.2.2 Current Water Supply Conditions ........................................................... 4-4

4.2.3 Imported Supplies ................................................................................... 4-4

4.2.4 Recycled Water Supplies ...................................................................... 4-10

4.2.5 Interconnections with Neighboring Agencies ........................................ 4-12

4.3 Possible New Local Supply Sources ................................................................ 4-12

4.4 Supply Reliability – Rincon Water Shortage Events and Consequences ......... 4-14

Contents

ii June 2014

5 Potable Water System ................................................................................................. 5-1

5.1 Summary ............................................................................................................ 5-1

5.2 Existing Water Distribution System .................................................................... 5-1

5.2.1 ID-1 (North and South) Water System .................................................... 5-4

5.2.2 ID-A Water System ................................................................................. 5-5

5.2.3 Existing Water System Field Review ...................................................... 5-5

5.3 Existing Water System Hydraulic Model and Analysis ....................................... 5-7

5.4 Fire Flow Impact Analysis................................................................................... 5-9

5.5 Storage and Pump Stations ............................................................................. 5-11

5.6 Future Water System and Reliability Projects .................................................. 5-13

5.6.1 Future Water System ............................................................................ 5-14

5.6.2 Reliability Projects ................................................................................ 5-14

5.6.3 Replacement Project ............................................................................ 5-18

6 Recycled Water System ............................................................................................... 6-1

6.1 Summary ............................................................................................................ 6-1

6.1.1 Existing System ...................................................................................... 6-1

6.1.2 Future Opportunities ............................................................................... 6-1

6.1.3 System Expansion / Recycled Water ...................................................... 6-1

6.1.4 Recycled Water Supply Agreements with the City of Escondido ............ 6-4

6.2 Overview and Design Criteria ............................................................................. 6-4

6.2.1 Recycled Water Design Criteria .............................................................. 6-4

6.2.2 Recycled Water Storage Criteria ............................................................ 6-5

6.3 Existing Recycled Water Distribution System ..................................................... 6-6

6.4 Current Recycled Water Use .............................................................................. 6-9

6.5 Recycled Water Supply .................................................................................... 6-10

6.5.1 Purchase Agreements with the City of Escondido ................................ 6-10

6.5.2 Hale Avenue Resource Recovery Facility ............................................ 6-11

6.5.3 Harmony Grove Village WRF ............................................................... 6-13

6.6 Potential Recycled Water System Expansion .................................................. 6-13

6.6.1 Existing and Future Customers Serviceable by Existing System (300 AF/yr) .................................................................................................... 6-14

6.6.2 Expansion of the Recycled Distribution System (420 AF/yr) ................ 6-15

6.6.3 Future Recycled Water Summary ......................................................... 6-17

7 Capital Improvement Program and Review of Capacity Fees .................................. 7-1

7.1 Summary ............................................................................................................ 7-1

7.1.1 Water System Projects ........................................................................... 7-1

7.1.2 New Local Supply Projects ..................................................................... 7-1

7.2 Recommended Projects ..................................................................................... 7-3

7.2.1 Water System CIP Projects .................................................................... 7-3

7.2.2 New Local Supply CIP Projects .............................................................. 7-3

7.2.3 Combined Total CIP ............................................................................... 7-5

7.3 Fire Flow Improvement Projects ......................................................................... 7-5

Contents

iii June 2014

7.4 Capacity Fee Review ......................................................................................... 7-7

7.4.1 Introduction ............................................................................................. 7-7

7.4.2 Existing Potable Capacity (Connection) Fees ........................................ 7-8

7.4.3 Existing Recycled Capacity (Connection) Fees ...................................... 7-8

7.4.4 Review of Capacity Fee Methodologies ................................................. 7-9

7.5 Capacity Fee Update and Recommendations .................................................... 7-9

7.5.1 Expansion Fee Update with Supply Offset Component .......................... 7-9

7.5.2 Buy-in Method....................................................................................... 7-11

7.5.3 Recycled Water Capacity Fee Options ................................................. 7-12

7.5.4 Summary Recommendations ............................................................... 7-13

Tables

Table 2-1 District Water System Criteria ............................................................................ 2-2

Table 3-1 Demographic and Water Demand Forecast for Normal Year Conditions, 2010-2035 ...................................................................................... 3-1

Table 3-2 Existing and Projected Per Capita Water Demands, 2013-2035 ........................ 3-3

Table 3-3 Potable Water Demand Forecasts from Recent District Master Plans .................................................................................................................. 3-4

Table 3-4 Demographic and Water Demand Forecast for Normal-Year Conditions, 2010-2035 ...................................................................................... 3-7

Table 4-1 Supply Summary for Normal-Year Conditions, 2013-2035 (AF/yr) .................... 4-1

Table 4-2 Metropolitan Projected Supply Capability and Projected Demands for Normal Year Conditions ................................................................................ 4-6

Table 4-3 Projected Verifiable Water Supplies for SDCWA Service Area – Normal Year Conditions ..................................................................................... 4-8

Table 4-4 SDCWA Connections ......................................................................................... 4-9

Table 4-5 Summary of Potential Shortage Events and Consequences............................ 4-15

Table 4-6 Summary of District Treated Water Storage Criteria ........................................ 4-17

Table 5-1 Existing Storage Analysis ................................................................................. 5-12

Table 5-2 Future (2035) Storage Analysis ........................................................................ 5-12

Table 5-3 Existing Pump Station Analysis ........................................................................ 5-13

Table 6-1 Supply Summary, Including Potential Additional Recycled Water for Normal Year Conditions, 2013-2035 ............................................................ 6-3

Table 6-2 Recycled Water Design Criteria ......................................................................... 6-5

Table 6-3 Recycled Water Pipelines .................................................................................. 6-7

Table 6-4 Top Recycled Water Customers......................................................................... 6-9

Table 6-5 720 AF/yr Additional Recycled Water Demand Goal ........................................ 6-14

Table 7-1 Summary CIP for Water System Projects .......................................................... 7-1

Table 7-2 Summary CIP for New Local Supply Projects .................................................... 7-2

Table 7-3 Water System CIP Projects ................................................................................ 7-4

Table 7-4 New Local Supply CIP Projects .......................................................................... 7-5

Table 7-5 Combined Total CIP ........................................................................................... 7-5

Table 7-6 Long-Term Fire Flow Upgrade Projects ............................................................. 7-6

Contents

iv June 2014

Table 7-7 District ID-1 and ID-A Existing Water Connection Fees ..................................... 7-8

Table 7-8 District ID-1 and ID-A Existing Recycled Connection Fees ................................ 7-8

Table 7-9 ID-1 and ID-A Water Connection Fee Calculations .......................................... 7-10

Table 7-10 ID-1 and ID-A Water Supply Offset Fee Calculation ........................................ 7-10

Table 7-11 Capacity Fee (Expansion) Summaries ............................................................. 7-11

Table 7-12 Buy-In Fee Based on Estimated Historical Assets ........................................... 7-12

Figures

Figure 1-1 District Vision and Mission Statements .............................................................. 1-3

Figure 1-2 Study Area .......................................................................................................... 1-4

Figure 1-3 Development Areas and Land Use .................................................................... 1-5

Figure 1-4 Study Area Jurisdictions ..................................................................................... 1-6

Figure 2-1 District Average Day Demand and Maximum Day Demand Diurnal Curves ................................................................................................................ 2-3

Figure 2-2 Fire Severity Zones ............................................................................................ 2-4

Figure 3-1 Historical and Projected Water Demands, 1990-2035 ....................................... 3-2

Figure 3-2 Forecast Methodology Summary........................................................................ 3-5

Figure 4-1 Supply Summary for Normal-Year Conditions, 2010-2035 ................................ 4-2

Figure 4-2 Metropolitan Sources of Supply ......................................................................... 4-5

Figure 4-3 Delivering Water to the District ........................................................................... 4-7

Figure 4-4 Major Facilities of the ESP System .................................................................... 4-9

Figure 4-5 District Recycled Water Distribution System .................................................... 4-11

Figure 4-6 USGS Test Well in Hodges Basin .................................................................... 4-13

Figure 5-1 Existing Potable Water System Schematic ........................................................ 5-2

Figure 5-2 Water Pressure Zones and Major Facilities ........................................................ 5-3

Figure 5-3 Peak Hour Pressure Results ............................................................................ 5-10

Figure 5-4 Proposed Potable Water System ..................................................................... 5-15

Figure 5-5 Proposed Potable Water System Schematic .................................................... 5-16

Figure 6-1 District Existing Recycled Water System ............................................................ 6-2

Figure 6-2 Recycled Water Hydraulic Profile ....................................................................... 6-8

Figure 6-4 Existing and Proposed Recycled Water System .............................................. 6-19

Figure 7-1 Potable and Recycled Water CIP Projects ....................................................... 7-15

Appendices

Appendix A Board-adopted Fire Flow Criteria Appendix B Level of Service Evaluation Appendix C Reservoir Siting Layouts Appendix D District and City of Escondido Interties Appendix E Data Logger Recorded Pressure Summary Appendix F Recycled Water Expansion Data

Abbreviations

v June 2014

Abbreviations ADD Average Day Demand AF/yr acre-feet per year CDPH California Department of Health Services cfs Cubic feet per second CIP Capital Improvement Program County County of San Diego CPI Consumer Price Index CRA Colorado River Aqueduct District Rincon Del Diablo Municipal Water District DPR Direct potable reuse DU Dwelling units EDU Equivalent dwelling units ERTC Escondido Research and Technology Center ESP Emergency Storage Project FCF Flow Control Facility FCV Flow Control Valve fps Feet per second GIS Geographic Information System gpm Gallons per minute HARRF Hale Avenue Resource and Recovery Facility HGL Hydraulic Grade Line HOA Homeowners Association IID Imperial Irrigation District IPR Indirect potable reuse IRP Integrated Resources Plan LF Linear feet Master Plan 2013 Water Master Plan MDD Maximum Day Demand Metropolitan Metropolitan Water District of Southern California MG Million gallons MGD Million gallons per day NLS New local supply

Abbreviations

vi June 2014

psi Pounds per square inch RUWMP Regional Urban Water Management Plan SANDAG San Diego Association of Governments SDCWA San Diego County Water Authority SWP State Water Project USGS United State Geological Survey UWMP Urban Water Management Plan VCMWD Valley Center Municipal Water District VCPS Valley Center Pump Station VFD Variable Frequency Drive VID Vista Irrigation District WRF Water Reclamation Facility WTP Water Treatment Plant

1-1 June 2014

1 Introduction

1.1 Purpose This report summarizes the findings and recommendations of the 2013 Water Master Plan (Master Plan) for the Rincon Del Diablo Municipal Water District (District). The report provides a comprehensive review of the District’s potable and recycled water systems, and identifies a plan of capital improvements necessary for the systems to adapt to future conditions and to operate effectively and economically.

The primary purpose of the Water Master Plan is twofold:

1) Map Out Facilities and Supply Portfolio: Map out the District’s future facility needs and water supply portfolio.

2) Refine the Capital Improvement Program and Set Basis for Capacity Fees: Refine the District’s long-term Capital Improvement Program and document an objective basis for the setting of capacity fees.

In order to accomplish these objectives, the Master Plan analyzes existing and future land uses, as well as current water demands and trends. Through use of the District’s Geographic Information System (GIS) and hydraulic modeling software, the Master Plan evaluates the capacity of the existing water and recycled water systems and specifies improvements necessary to serve existing and future customers. Scheduling and phasing of these improvements is assigned based on regional population projections and known plans for development within the District’s service area. A capital improvement program (CIP) is then developed to guide the District toward timely and cost-effective investments that contribute to the sustainability of the District’s infrastructure and service reliability for the District’s customers.

The District’s previous 2005 Master Plan was prepared by Infrastructure Engineering Corporation. The 2005 Master Plan updated a previous version prepared in 1998 by B.C. Engineering, which in turn updated a plan prepared in 1991 by MacDonald-Stephens Engineers.

1.2 Authorization The District authorized a contract for preparation of the Master Plan with Atkins, then operating as PBS&J, at its regular Board meeting of May 11, 2010. The District subsequently elected to defer work on the Master Plan while it undertook investigations of its proposed Water Factory project as described in Chapter 4 of this report. Following completion of the Water Factory investigations, the District resumed work on the Master Plan which is now presented here as the 2013 Water Master Plan Update.

1 Introduction

1-2 June 2014

1.3 Report Outline and Synopsis The Master Plan report is organized into seven chapters as follows:

Chapter Contents Synopsis

1) Introduction Purpose Report outline District overview Existing and projected

land use

The Master Plan identifies the facilities, supplies, and capital funding the District will need to continue providing reliable water and recycled water service to its customers through 2035. Supply and demand conditions have changed significantly since the last District master plan in 2005; the 2013 Master Plan addresses these changed conditions.

2) Planning Criteria

Water and recycled system planning and design criteria

Level of Service concept review

The District’s planning criteria define the minimum levels of flow capacity, storage capacity, and operational reliability required for the District to provide excellent service to its customers. Because water service is a life-line requirement, these criteria and service standards are necessarily and appropriately high.

3) Water Demands

Historical, current, and projected water demands

Water demands have declined significantly in recent years due to conservation, water price increases, economic recession, and the mandatory use restrictions in effect during 2009 and 2010. The Master Plan projects potable demands will increase modestly in future years in response to population growth, but will remain below historical highs, and significantly below the levels projected in previous master plans.

4) Water Supplies

Existing and planned future water supplies

Review of District’s water supply reliability

The District will continue to be dependent on its two main water suppliers, the San Diego County Water Authority (SDCWA) for potable water, and the City of Escondido for recycled water. As part of its commitment to supply reliability and resource stewardship, the District will seek to offset new customer demands with new local supplies, such that there will be no increase in water purchases from the SDCWA.

5) Potable Water System

Review of existing system and needed improvements

Because demands will remain below their historical highs, the existing water distribution and storage system will generally be adequate to serve future average day conditions. Nevertheless, capital spending will be required to:

a) replace aging infrastructure, b) increase system redundancy, c) provide for new more rigorous fire flow requirements, and d) serve limited areas of new development.

6) Recycled Water System

Review of existing system and needed improvements

Possible system expansion to serve additional customers

The District’s existing recycled water system is currently being expanded to serve development in the Harmony Grove area. Further expansion is possible, contingent on costs, funding availability, and supply availability from the City of Escondido or other sources. For purposes of projecting capital spending requirements, the Master Plan assumes the District’s means of achieving its New Local Supply goal will be through expansion of the recycled water system. The District will continue to evaluate other new local supply options, and may reassign recycled water funding to other supply options should that prove advantageous.

7) Capital Improvement Program

Summary of 5-year and long-term capital spending recommendations

5-Year Capital Spending: Potable: $8.1 million Recycled: $4.1 million

Additional Long-Term Capital Spending (Beyond 5 Years): Potable: $9.1 million (not including fire flow upgrades) Recycled: $4.2 million

1 Introduction

1-3 June 2014

Figure 1-1 District Vision and Mission Statements

Our Vision: Rincon del Diablo Municipal Water District will be the water purveyor of choice for the customers in the Escondido Valley by achieving the highest levels of customer service; promoting social and environmental stewardship, ensuring a balanced approach of fulfilling financial obligations while advancing preparation and planning for routine and emergency operations; and providing regional leadership driving innovative management and water resource practices to deliver safe and reliable water services exceeding the customers’ expectations.

Our Mission: To deliver quality water to meet present and future needs in an environmentally and economically responsible manner, maintain infrastructure integrity, foster conservation, and maintain excellence in service as stewards of a natural resource for the public trust.

1.4 District Overview

1.4.1 Service Area and Governance

The District provides potable water and recycled water service to portions of northern San Diego County in the Escondido Valley area. A five-member Board of Directors, elected by voters within respective geographic divisions, oversees the District. The District’s mission statement is presented in Figure 1-1.

Most of the District's service area is located either within the City of Escondido or in unincorporated portions of San Diego County (County), with smaller areas within the cities of San Marcos and San Diego. The District consists of a parent district, two water improvement districts, and a fire district. The fire district is administered by the City of Escondido and, other than its role in establishing fire flow requirements, is not the subject of this Master Plan. The District provides water and recycled water service to approximately 30,000 people through its two Improvement Districts, ID-1 and ID-A. Figure 1-2 illustrates the location of the District and the boundaries of the Parent District, ID-1, and ID-A.

The District’s active water and recycled water service area, consisting of ID-1 and ID-A, covers a wide variety of land uses, as described in the following sections.

1.4.2 Existing and Projected Land Uses for ID-1

ID-1 is by far the largest of the two improvement districts, containing approximately 85 percent of the District’s total active service land area, and approximately 90 percent of its population. The land area of ID-1 is approximately evenly split between the City of Escondido and unincorporated County areas, and is dominated by residential, rural residential and agricultural land uses. A significant exception is the industrial and commercial lands that make up the Escondido Research and Technology Center (ERTC) area, which are located within the City of Escondido boundaries. The ERTC includes the new Palomar Medical Center hospital facility, which began operations in 2012, and the Sempra Energy electrical generating plant. The Sempra Energy facility is the District’s largest recycled water customer, as described in Chapter 6 of this report. Figure 1-3 illustrates the location of the ERTC area and future planned development projects.

Future land uses in ID-1 are governed by the adopted general plans of the County and the City of Escondido, and may include areas currently in the County that could be subject to annexation to the City of Escondido because of sewer service requirements or other reasons. Relevant land use issues for each of the two jurisdictions are further described in this section. Figure 1-4 shows the municipal boundaries of the cities in and around the District.

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Development/SPAValianoHarmony Grove VillageERTCHarmony Grove Meadows

Land UseAgricultureCommercial/OfficeMulti-Family ResidentialIndustrialLandscape/Open Space/ParkMobile Home ParkSingle Family ResidentialRural ResidentialVacant and Undeveloped Land


April 2014

Development Areasand Land Use

Figure 1-3

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June 2014

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April 2014

Study AreaJurisdictions

Figure 1-4

6̄,000Feet

June 2014

1 Introduction

1-7 June 2014

County of San Diego – Harmony Grove Village and Other Future Development

The County adopted an update to its General Plan in 2012. The 2012 General Plan incorporated the County’s 2005 approval of the 750 residential unit master-planned Harmony Grove Village development, located in the southwestern portion of ID-1. The County General Plan also allows for other rural lands within ID-1 in the vicinity of Harmony Grove Village to develop at higher densities, including a proposed approximate 200 unit residential project, south of Harmony Grove Village, known as Harmony Meadows. In addition, north of Harmony Grove Village, a 334 unit residential project known as Valiano has been proposed as a Specific Plan Amendment. In summary, it appears a total of 1,400 units may be developed in the County area, including Harmony Grove Village and other potential developments, which will be included in the District’s 2035 forecast and Master Plan.

The economic recession that began in 2008 delayed the construction of the Harmony Grove Village development and resulted in a very slow period of growth for the District over the past five years. With the economy now showing signs of recovery, the Harmony Grove Village project has moved into initial construction.

City of Escondido

The District expects the improvement in the region’s economy will also foster increased activity and development of the many vacant commercial/industrial parcels in the ERTC area. Development of these parcels may also be driven in part by the opening of the new Palomar Medical Center hospital facility in 2012, which may generate additional office space demand for medical services and related businesses.

District History

Origin of the Name and Early History: The District derives its name from Rancho Rincon del Diablo. In 1843, Juan Bautista Alvarado received the Rancho as a land grant after the area fell from the jurisdiction and protection of the Mission San Diego de Alcala. Because it was no longer part of the mission system, the land was considered unblessed, hence the Spanish “Rincon Del Diablo,” which translates as "the devil's corner," or "the lurking place of the devil.”

In 1885, a group of businessmen purchased the Rancho and subdivided it into small farm tracts and the City of Escondido. One year later, an irrigation district was formed. The irrigation district sold bonds to fund the development of a water supply system from the San Luis Rey River. A dam was constructed at Lake Wohlford and by 1905 the Escondido Mutual Water Company, a private entity, acquired the irrigation district facilities. The company continued to improve the diversion canal and distribution system to supply its stockholders with irrigation and domestic water.

From its incorporation in 1888 until 1951, the City of Escondido consisted of a three square-mile area which today forms the excluded window in the center for the Rincon Parent District. Following World War II, the area experienced a period of rapid growth. As the area grew, Escondido Mutual continued to serve water obtained through local sources until demand outpaced supply.

The Parent District: Also during this post-war growth, the valley experienced drought, which heightened the need for an imported supply of water to supplement and support the growing residential community, both inside and outside the City limits. Colorado River and Northern California water imported by public agencies (the SDCWA, and its supplier, the Metropolitan Water District of Southern California) became the best option. However because the Escondido Mutual Water Company was not a public entity, it was prohibited by law from purchasing water directly from either Metropolitan or the SDCWA. To provide residents legal access to imported water, Rincon del Diablo Municipal Water District was incorporated on February 19, 1954, under the provisions of the Municipal Water District Act of 1911.

The Improvement Districts: The District’s 1954 incorporation covered an area today known as the Parent District. The Board members then declared the District’s intent to construct a distribution system, and called a special election for voters to approve the issuance of debt to build such a system. However, because the Escondido Mutual Water Company, a non-government entity, was operating partially within the Parent District, there was only interest in constructing a public distribution system in two areas of the District, now known as Improvement District 1 (ID-1) and Improvement District A (ID-A). ID-1, formed on January 26, 1955, is located in the western part of the Parent District, and ID-A, formed on December 12, 1961, is located in the southern part of the Parent District, both as shown in Figure 1-2.

1 Introduction

1-8 June 2014

In addition to commercial development, the Escondido Country Club, served by both the District and City of Escondido, has recently filed bankruptcy and may be redeveloped in the future. The loss of the golf course impacts future recycled water demand opportunities for the District and City of Escondido, and the District will need to monitor potential development options and determine appropriate water service for any future redevelopment.

1.4.3 Existing and Projected Land Uses for ID-A

ID-A is the smaller of the District’s two improvement districts, containing approximately 15 percent of the District’s total active service land area, and approximately 10 percent of its population. The southernmost portion of ID-A is located within the City of Escondido, and the northernmost portion is mostly unincorporated County areas with just a small fraction within the City of Escondido limits.

The ID-A service area is entirely residential and rural residential land uses and is generally fully built-out, such that the District anticipates little additional development and growth over the course of the 2035 planning horizon. Future land uses in ID-A are governed by the adopted general plans of the County of San Diego and the City of Escondido.

2-1 June 2014

2 Planning Criteria

2.1 Purpose This chapter reviews the District’s planning and design criteria, as used by the Master Plan to evaluate and plan the potable water distribution system. The core of the criteria presented here, including peaking factors, pipeline sizing, pressure requirements, pump station sizing, and water storage requirements, are derived from the District’s 2005 Water Master Plan. The District’s recycled water system planning criteria is presented separately in Chapter 6.

The District must meet certain planning and design criteria such that the performance of the water distribution system serves the needs of the community. The District has established a level of service that complies with state and federal potable water regulations in order to ensure that potable water distributed within its service area meets public health and safety standards. The most notable change in criteria by the District since the last Water Master Plan was the adoption of simultaneous fire flow criteria for high risk areas (see Appendix A).

Also, as part of the 2013 Master Plan, key level of service criteria were reviewed to evaluate enhancing or maintaining current service levels based on the estimated cost to increase service levels relative to the resulting benefit (see Section 2.3).

2.2 Water System Criteria Update The water system criteria establish the parameters within which the District water system infrastructure will be operated. A summary of the criteria is provided in Table 2-1. These criteria are the basis for evaluating water system performance and determining facilities required to serve future development.

The unit water demand factors presented in Table 2-1 are a conservative estimate and can be used in analyzing most future development projects; however, more specific unit demand factors may be used should more detailed land development information be available.

Water use patterns for the District typically follow a residential diurnal pattern. A typical average day diurnal curve has been developed for the District and is illustrated on Figure 2-1.

In general, the District’s water system has performed well adhering to the 2005 Water Master Plan criteria. Accordingly, the 2013 Master Plan proposes no major changes in criteria other than for fire flow, as noted below.

Because of the fire flow changes in the California Fire Code (2012) and the District’s adoption of a revised fire flow policy requiring capacity to service dual simultaneous fires within high and very high fire severity zones, higher fire flows must be evaluated. Fire severity zones are presented in Figure 2-2.

2 Planning Criteria

2-2 June 2014

Table 2-1 District Water System Criteria

Item Criteria Peaking Factors Minimum Day/Average Day Ratio 0.7 Maximum Day/Average Day Ratio 1.7 Peak Hour/Average Day Ratio 2.9

Piping/Pipelines Maximum Velocity - Peak Hour 7 fps Maximum Velocity - Max Day + Fire 10 fps (new pipes), 15 fps (existing pipes) Maximum Headloss - allowable at peak flow 15 feet/1,000 feet

Pressure Maximum Static - Desired 60-120 psi Minimum Residual (Peak Hour) 40 psi Minimum Residual (Max Day + Fire) 20 psi Maximum Allowable 150 psi

Water Duty Factors Single Family Residential 510 gpd/DU Single Family Residential (Estate, lots > 2 acres) (1) 700 – 1,250 gpd/DU Multi-family Residential 400 gpd/DU Commercial 1,400 gpd/DU Institutional 1,500 gpd/DU Industrial 1,400 gpd/DU

Fire Flows(2) Single Family Residential (Non or Moderate severity) 1,500 gpm for 2 hours Single Family Residential (High and Very High severity) 2,500 gpm for 2 hours Multi-family Residential 2,500 gpm for 2 hours Non-Residential 2,500 gpm for 2 hours Dual Fire Flows Within general vicinity and pressure zone

Storage

Operating Storage 33% average day demand (ID-1), 40% average day demand (ID-A)

Fire Storage Maximum fire flow (dual) x duration Emergency Storage 300% average day demand

Pump Station Open System 24 hour maximum day demand

Closed System Maximum day demand plus fire or peak hour, whichever is greater

Minimum Number of Pumps 3 (2 duty + 1 standby) Standby Power Generator fps = feet per second; psi = pounds per square inch; gpd/DU = gallons per day per dwelling unit; gpm = gallons per minute (1) Water duty factors for estate single-family residential may vary based on specific development plans. (2) Fire severity zone areas are shown on Figure 2-1.

2 Planning Criteria

2-3 June 2014

Figure 2-1 District Average Day Demand and Maximum Day Demand Diurnal Curves

Appendix A includes the Board adopted fire flow criteria requiring simultaneous fires. Currently this fire flow standard is not required by the City of Escondido; however, it was based on a concern by the Board for wild land fires in the water service area. The fire severity zones were developed as a part of the California Fire Code update requiring higher residential fire flows for wild land urban interface areas. As shown in Figure 2-2, a large portion of ID-1 is exposed to hillside and wild land areas and is zoned as high and very high fire severity areas. These revised fire flow criteria will be utilized for all new development projects and will need to be reasonably applied and phased in over time to existing developed areas, as most of the District had been designed to a lower fire flow standard. Chapter 5 discusses the impacts of the new fire flow requirements on the existing water system.

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April 2014

Fire Severity ZonesFigure 2-2

¯7,000Feet

Note: Fire Severity Zone data from SANGIS

June 2014

2 Planning Criteria

2-5 June 2014

2.3 Level of Service Criteria Over the past few years the District has recognized the challenges posed by regional drought, reduced water sales, stalled development due to economic conditions, and increased imported water costs. As part of its preparation of the Master Plan, the District has sought to identify the risk/reliability and cost/benefit associated with varying levels of service to meet the needs of the District. A “Level of Service” assessment evaluated opportunities to enhance service and supply reliability. The following basic service criteria were reviewed:

Water Supply Water Storage Water Pressure Water Quality

Water Distribution Reliability Fire Protection Water Demands

The evaluation focused on understanding the cost and facilities for the District to provide the most basic level of performance and then incrementally evaluating the added value in enhancing the level of service and understanding the cost implications. For example, increasing local distribution storage from three days to seven days was evaluated as an “Enhanced” level of service to meet the District’s needs during a SDCWA shut down. Moreover, an "Enhanced +” Level of Service for storage was reviewed which would recommend the District secure water storage in the Olivenhain Reservoir or the City of Escondido system.

Appendix B includes a discussion of the alternate level of service and criteria evaluated as part of the Master Plan update and provides a summary of the Master Plan recommendations relative to a level of service standards. The District should review its Level of Service on an annual basis as part of its CIP development.

Key Water Planning Criteria Updates

1) Fire Code Update: Residential fire flow increasing from 1,500 gpm to 2,500 gpm within high and very high fire severity zone areas.

2) Dual Fire Flow: Simultaneous Fire Flows required within one pressure zone, thereby increasing fire flow need to 5,000 gpm (two 2,500 gpm fires) within high and very high fire severity zone areas.

2 Planning Criteria

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3-1 June 2014

3 Water Demands

3.1 Summary

3.1.1 Current and Projected Water Demands

The District will experience modest levels of growth in population and employment. This will result

in an increase in water demands as compared to current levels, although demands will increase

at a much slower rate due to conservation efficiencies.

Based on data and projections contained in the most recent Regional Growth Forecast prepared by the San Diego Association of Governments (SANDAG), the District projects that from 2013 to 2035 population will increase by 17 percent, and employment by 25 percent. This growth will generate an increase in water demands, but conservation efficiencies will moderate this increase to approximately 12 percent overall. The District’s projections for growth and water demands in its service area are summarized in Table 3-1 below.

Table 3-1 Demographic and Water Demand Forecast for Normal Year Conditions, 2010-2035

2013 2015 2020 2025 2030 2035 Increase

2013-2035 Growth Forecast Population (1) 30,000 30,400 31,500 33,000 34,500 35,200 5,200 17% Employment (2) 20,000 20,600 22,100 23,400 24,600 24,900 4,900 25% Accounts Total 7,810 7,840 8,215 8,725 9,220 9,450 1,640 21% -- Residential (3) 6,800 6,820 7,180 7,680 8,170 8,400 1,600 24% -- Other (4) 1,010 1,020 1,035 1,045 1,050 1,050 40 4% Demand Forecast (AF/yr) Potable, before offsets (5) 7,000 7,050 7,280 7,550 7,790 7,900 900 13% Recycled - Sempra (6) 2,700 2,700 2,700 2,700 2,700 2,700 0 0% Recycled - Other (7) 330 330 550 700 700 700 370 112% Total Demands 10,030 10,080 10,530 10,950 11,190 11,300 1,270 13% AF/yr = acre feet per year (1) The service area population forecast is based on the adopted SANDAG Series 12 Regional Growth Forecast (February 2010),

but the District has adjusted the rate of growth projected by SANDAG downward by approximately 16 percent to account for imprecisions inherent in assigning data from the SANDAG regional forecast to the relatively small geographical areas of the District’s ID-A and ID-1 service areas. The downward adjustment accounts for a) known land use conditions within the Improvement Districts, and b) exchange customers served by the City of Escondido. The adjustments lower the forecasted number of new residential accounts by approximately 300 units as compared to the raw SANDAG data, with the rate of growth in population scaled downward proportionately.

(2) SANDAG Series 12 Regional Growth Forecast (3) SANDAG Series 12 Regional Growth Forecast, with growth adjusted downward by approximately 300 units per note 1 (4) District projection. Many of the new potable accounts are the large commercial lots on Citracado Parkway adjacent to the new

Palomar Hospital facility. (5) The District plans to develop new local supplies sufficient to offset the 900 AF increase in annual potable demand projected

here. If these new supplies are recycled water, then potable demands will decrease by a like amount, and recycled demands will increase by a like amount.

(6) Based on actual use during 2011 and 2012. Usage assumed to remain at this level throughout forecast period. (7) Based on actual use during 2011 and 2012, with projected increased use due to a) the Harmony Grove Village development,

b) conversions of existing potable customers serviceable from the existing recycled distribution system, and c) one or more projected additional future development projects that the District will condition to require recycled water use.

3 Water Demands

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By expanding its recycled water distribution system, the District may be able to shift some of the projected potable demands shown in Table 3-1 to recycled demands. This possibility is more fully addressed in Chapter 4: Water Supplies, and Chapter 6: Recycled Water.

Due to conservation efficiencies and the expanded use of recycled water, projected potable

demands through 2035 are lower than recent historical demands for 1999 through 2008, and

significantly below the projections of previous master plans.

For the ten year period from 1999 through 2008, potable water demands in the District service area averaged more than 8,000 acre feet per year (AF/yr). Demands subsequently dropped due to mandatory water use restrictions during 2009 and 2010, economic recession, increasing water rates, and increased conservation. The District projects that demands will rebound slightly from recent lows, but will remain below historical highs throughout the forecast period. This projected moderation of demands results primarily from increased conservation measures by water users. Historical and projected demands, exclusive of the large recycled water demand for the Sempra Energy plant, are summarized in Figure 3-1.

Figure 3-1 Historical and Projected Water Demands, 1990-2035 (Excluding Sempra Recycled)

0

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HISTORICAL PROJECTED

1991-93 drought

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recession

1998 El Niño

3 Water Demands

3-3 June 2014

3.1.2 Per Capita Potable Use / Senate Bill X7-7 Compliance

Per capita potable water use will continue to decline due to conservation efficiencies and the

expanded use of recycled water. Use will remain below and in compliance with the target levels

established by California Senate Bill X7-7, the “20 percent by 2020” legislation enacted into law

in 2009.

Projected per capita water use is summarized in Table 3-2.

Table 3-2 Existing and Projected Per Capita Water Demands, 2013-2035

2013 2015 2020 2025 2030 2035 Increase

2013-2035 Potable Demands, before offsets (5) (AF/yr) 7,000 7,050 7,280 7,550 7,790 7,900 900 13% Population (1) 30,000 30,400 31,500 33,000 34,500 35,200 5,200 17% Per Capita Potable Demand (gpd) 208 207 206 204 201 200 -8 -4% Senate Bill X7-7 Per Capita Use Goals (gpd) (legislatively defined only for 2015 and 2020)

-- 239 218 -- -- -- -- --

AF/yr = acre feet per year; gpd = gallons per day (1) The service area population forecast is based on the adopted SANDAG Series 12 Regional Growth Forecast (February 2010), but

the District has adjusted the rate of growth projected by SANDAG downward by approximately 16 percent to account for imprecisions inherent in assigning data from the SANDAG regional forecast to the relatively small geographical areas of the District’s ID-A and ID-1 service areas. The downward adjustment accounts for a) known land use conditions within the Improvement Districts, and b) exchange customers served by the City of Escondido. The adjustments lower the forecasted number of new residential accounts by approximately 300 units as compared to the raw SANDAG data, with the rate of growth in population scaled downward proportionately.


Palomar Hospital facility. (5) The District plans to develop new local supplies sufficient to offset the 900 AF increase in annual potable demand projected here.

If these new supplies are recycled water, then potable demands will decrease by a like amount, and recycled demands will increase by a like amount.



3.2 Setting and Background

3.2.1 The Role of Demand Forecasts, and the Recalibration of Past Trends

The projection of future water demands is central to the Master Plan in that the forecast determines the capacity requirements of the District’s water distribution system, and determines the quantity of water supplies the District will need to serve customer demands. These factors in turn determine the make-up of the District’s CIP.

Water demand forecasts generally consider how projected changes in land use, population, employment, and conservation levels will alter the water demands existing at the time of the forecast. Over the past 25 years, District water master plans have examined projections of higher population, higher employment, and higher developed acreages, and have concluded

3 Water Demands

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that demands would continue to increase at nearly commensurate rates. These recent projections are summarized in Table 3-3.

Table 3-3 Potable Water Demand Forecasts from Recent District Master Plans

Master Plan Year Issued Planning Horizon

Projected Demand MGD AF/yr

1991 2010 12.6 14,100 1998 2018 9.2 10,300 2004 2030 12.1 13,600 2013 2035 7.1 7,900

MGD = million gallons per day AF/yr = acre feet per year

In comparison, the 2013 Master Plan significantly recalibrates projected water demands, as summarized in Table 3-3 and detailed later in this chapter. This recalibration is in response to the extraordinary reductions in water demands seen during the past four years and to other changed conditions, and is notwithstanding relatively little change in the demographic and land use projections for the District service area. The primary factors driving this recalibration consist of the following:

a) Reduction in Baseline Water Demands / Increased Adoption of Conservation Practices: As shown in Figure 3-1, water demands in the District service area – excluding the large recycled water demand of the Sempra Energy facility – have declined over the past three years by approximately 25 percent in comparison to average demands during the 1999-2008 period. These reductions have occurred in response to several events and conditions, some temporary and some permanent:

Mandatory Water Use Restrictions of 2009 and 2010: Beginning in the Spring of 2009, the Metropolitan Water District of Southern California (Metropolitan) and the San Diego County Water Authority (SDCWA) implemented water shortage allocation plans in response to drought and regulatory induced reductions in imported water supplies. This led the District and most other San Diego area water retailers to impose mandatory water use restrictions on their customers. These restrictions led some customers to replace or remove high-water use landscaping, and to adopt additional structural and behavioral water conservation practices. Although the restrictions were lifted in the Spring of 2011, the District continues to promote water conservation practices and will do so throughout the planning horizon.

Economic Recession: The Great Recession that began in 2008 reduced economic activity and tightened household budgets, leading to reductions in water demands. The District anticipates that this effect will diminish as the economy recovers.

Unusually Cool Summers of 2010 and 2011: The unusually cool and overcast summers of 2010 and 2011 led to reduced water demands. The District anticipates this effect to be temporary.

3 Water Demands

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b) Increased Price of Water: Driven mostly by increases in the costs of imported water, District water rates over the five year period from 2008 to 2013 rose at an average rate of 10 percent per year, considerably faster than inflation. As water bills have increased, many customers have taken actions to reduce their water use. The rate projections from the SDCWA indicate that water rates are likely to continue to increase at a rate equal to or greater than the rate of inflation, such that customers will continue to have strong price incentives to maintain and increase conservation practices.

c) Increased Adoption of Water Conservation Measures: Customer adoption of water conservation measures, including low water use toilets and appliances, more efficient irrigation systems and irrigation system controllers, and low water use landscaping, has been gradually increasing for decades and will continue to increase throughout the planning period. This will help drive water demands lower.

3.2.2 Forecast Methodology

Recognizing the near built-out state of the District service area, the Master Plan projects future demands using existing demands as a base, and as the net of the components listed in Figure 3-2 and summarized below:

a) Existing Baseline Demands: Existing baseline demands are the demands projected to occur during calendar year 2013, normalized to average weather and economic conditions. The District anticipates that 2013 demands will rebound upward slightly from their lows of the past three years, while remaining significantly below the 1999-2008 average.

b) New Development Demands: The District has projected the number of new residential and other accounts based on the adopted SANDAG Series 12 Regional Growth Forecast (February 2010). The District has adjusted the rate of growth projected by SANDAG downward by approximately 16 percent to account for imprecisions inherent in assigning data from the SANDAG regional forecast to the relatively small geographical areas of the District’s ID-A and ID-1 service areas. The downward adjustment accounts for 1) known land use conditions within the Improvement Districts,

Figure 3-2 Forecast Methodology Summary

a) Existing Baseline Demands

+

b) New Development Demands

+

c) Increased Demands Due to Higher Employment and Economic Activity

-

d) Reduced Demands Due to Additional Conservation Efficiencies

=

FUTURE DEMANDS

Demand forecast components. The 2013 Master Plan projects that future demands will increase only modestly beyond existing baseline demands, with new development being the primary cause of the increase. Increased employment and economic activity will exert upward pressure on demands, but this will be countered by the trend toward increasing implementation of conservation measures.

3 Water Demands

3-6 June 2014

and 2) exchange customers served by the City of Escondido. The adjustments lower the forecasted number of new residential accounts by approximately 300 units as compared to the raw SANDAG data.

c) Increased Demands Due to Higher Employment and Economic Activity: Employment and economic activity in the District service area are projected to increase faster than population growth, and this will exert upward pressure on water demands.

d) Reduced Demands Due to Additional Conservation Efficiencies: As reviewed above, the District anticipates continuing increases in the rate of adoption of conservation measures by customers, resulting in downward pressure on water demands.

3.3 Historical and Projected Water Demands

3.3.1 Current and Projected Demands

Based on data and projections contained in the most recent Regional Growth Forecast prepared by SANDAG, the District projects that from 2013 to 2035 population will increase by 17 percent and employment by 25 percent. This growth will generate an increase in water demands over the period, but increasing conservation efficiencies will moderate this increase to approximately 12 percent overall. The District’s projections for growth and water demands in its service area are summarized in Table 3-4 on the next page.

Much of the residential growth in the District will be in the form of master planned developments and large scale subdivisions, including Harmony Grove Village, Valiano, and Harmony Meadows. District policy will require these developments utilize recycled water for their common-area landscaping, and this use accounts for most of the increase in recycled water demands shown in the table.

The District may be able to shift some of the projected potable demands shown in the table to recycled demands through the possible expansion of its recycled water distribution system. This possibility is more fully addressed in Chapter 4: Water Supplies.

3.3.2 Conservation Efficiencies / “20% by 2020” Compliance

Per capita potable water use will continue to decline due to conservation efficiencies and the expanded use of recycled water. Use will remain below and in compliance with the target levels established by California Senate Bill X7-7, the “20 percent by 2020” legislation enacted into law in 2009. Projected per capita water use is summarized in Table 3-2 in the Summary section of this chapter.

3.3.3 Allocation of Demands for Use in the Hydraulic Network Model

The Master Plan has utilized a computerized hydraulic network model for the evaluation of the District’s water distribution system. In order to produce accurate results, the network model requires that water demands be assigned geographically to each of approximately 1,200 demand nodes. The Master Plan has done this by utilizing the District’s billing system database of actual customer water demands, with each demand assigned geographically using GIS software. To develop future demand conditions, demands were assigned at the location of

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known development with a small portion of future growth demands spread across the ID-1 system. Additional information on the development of the network model is presented in Chapter 5.

Table 3-4 Demographic and Water Demand Forecast for Normal-Year Conditions,

2010-2035

2013 2015 2020 2025 2030 2035 Increase

2013-2035 Growth Forecast Population (1) 30,000 30,400 31,500 33,000 34,500 35,200 5,200 17% Employment (2) 20,000 20,600 22,100 23,400 24,600 24,900 4,900 25% Accounts -- Total 7,810 7,840 8,215 8,725 9,220 9,450 1,640 21% -- Residential (3) 6,800 6,820 7,180 7,680 8,170 8,400 1,600 24% -- Other (4) 1,010 1,020 1,035 1,045 1,050 1,050 40 4%

Demand Forecast (AF/yr) Potable, before offsets (5) 7,000 7,050 7,280 7,550 7,790 7,900 900 13% Recycled - Sempra (6) 2,700 2,700 2,700 2,700 2,700 2,700 0 0% Recycled - Other (7) 330 330 550 700 700 700 370 112% Total Demands 10,030 10,080 10,530 10,950 11,190 11,300 1,270 13% (1) The service area population forecast is based on the adopted SANDAG Series 12 Regional Growth Forecast (February 2010),

but the District has adjusted the rate of growth projected by SANDAG downward by approximately 16 percent to account for imprecisions inherent in assigning data from the SANDAG regional forecast to the relatively small geographical areas of the District’s ID-A and ID-1 service areas. The downward adjustment accounts for a) known land use conditions within the Improvement Districts, and b) exchange customers served by the City of Escondido. The adjustments lower the forecasted number of new residential accounts by approximately 300 units as compared to the raw SANDAG data, with the rate of growth in population scaled downward proportionately.


Palomar Hospital facility. (5) The District plans to develop new local supplies sufficient to offset the 900 AF increase in annual potable demand projected

here. If these new supplies are recycled water, then potable demands will decrease by a like amount, and recycled demands will increase by a like amount.



3 Water Demands

3-8 June 2014


4-1 June 2014

4 Water Supplies

4.1 Summary

4.1.1 Balance of Supplies and Demands / New Local Supplies

The District will continue to be dependent on its two main water suppliers, the SDCWA for

potable water, and the City of Escondido for recycled water. The District will seek to offset

growth-induced increases in potable water demands by expanding its recycled water

distribution system or developing other new local supplies.

The District currently supplies all its potable water demands with purchases from the SDCWA, and all of its recycled water demands with purchases from the City of Escondido. As part of its commitment to supply reliability and resource stewardship, the District will seek to offset new customer demands with new local supplies, such that there will be no increase in water purchases from the SDCWA. The resulting balance of supplies and demands is summarized in Table 4-1 and in Figure 4-1 on the following page.

Table 4-1 Supply Summary for Normal-Year Conditions, 2013-2035 (AF/yr)

2013 2015 2020 2025 2030 2035 Increase

2013-2035 Demands Total(1) 10,030 10,080 10,530 10,950 11,190 11,300 1,270 13% Supplies SDCWA (potable) 7,000 7,000 7,000 7,000 7,000 7,000 0 0% Recycled – Total 3,030 3,030 3,250 3,400 3,400 3,400 370 12% -- Escondido Purchases - Sempra 2,700 2,700 2,700 2,700 2,700 2,700 0 0% -- Escondido Purchases – Other 330 330 330 480 480 480 150 45% -- Harmony Grove WRP 0 0 220 220 220 220 220 -- New Local Supply(2) 0 50 280 550 790 900 900 -- Total Supply 10,030 10,080 10,530 10,950 11,190 11,300 1,270 13% (1) See Table 3-1 for details on Demands. (2) New Local Supply may be recycled water, groundwater, indirect or direct potable recycled supplies, or a

combination.

Much of the projected residential growth in the District will be in the form of master planned developments and large subdivisions. District policy will require these developments to utilize recycled water for their common-area landscaping, and this use accounts for most of the increase in recycled water supply shown in the table.

For that portion of new water demand that cannot be directly supplied with recycled water, the District plans to implement offsetting amounts of other new local supply development, as shown in the table. This new local supply could consist of additional increments of non-potable recycled water delivered to existing customers via expansion of the District’s recycled water distribution system, groundwater, indirect-potable recycled supplies, or a combination of these. For planning purposes, and for use projecting capital spending requirements, the Master Plan assumes the

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new local supply will primarily be additional recycled water, supplied to existing irrigation customers and others with large landscape water demands in lieu of their current potable supplies. This same capital funding could instead be applied to an alternative local supply should future studies indicate such a supply is preferable to expansion of the recycled water system.

Figure 4-1 Supply Summary for Normal-Year Conditions, 2010-2035

4.1.2 Water Supply Reliability

The District’s supply infrastructure and agreements allow it to provide an adequate level of

supply reliability to its customers during planned and unplanned interruptions of the imported

water supply system. The District could realize further improvements in supply reliability by

pressing for completion of a deferred component of the SDCWA’s Emergency Storage Project,

and through refinements to the mutual assistance provisions of the District’s 1994 agreement with

the City of Escondido.

The District has in place many assets with which to maintain water supplies during short-term and long-term shortage events. A common supply reliability benchmark for SDCWA member agencies is the ability to maintain deliveries to customers during a scheduled 10-day wintertime shutdown of either one of the SDCWA’s two main aqueduct systems. During such an event, the District is able to maintain all deliveries by utilizing its interconnections with the City of Escondido, and by drawing down a portion of its treated water storage.

During longer duration interruptions of the imported water supply, the District currently is heavily reliant on its interconnections with the Vista Irrigation District (VID) and the City of Escondido, and on its 1994 Settlement and Operations Agreement with the City governing mutual aid and other matters. The 1994 Agreement states a “cooperative intention” that the City will provide supply assistance to the District during aqueduct interruptions, but does not fully commit the City to do so. The Master Plan recommends the District review the 1994 Agreement and consider opportunities to work with the City to clarify the provisions governing water shortage events.

No net increase in imported water demands. Although overall demands will increase modestly in response to growth in population, housing units, and employment, the District plans to offset these new demands by increasing its use of recycled water and other new local supplies. The result is to hold its purchases of imported water flat.

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4 Water Supplies

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Over the past 15 years, the SDCWA has been constructing its multi-phased Emergency Storage Project (ESP), which is designed to provide emergency water supply throughout the SDCWA service area during a two-month interruption of the imported water supply. Unfortunately, the provision of ESP service to the District service area is dependent on a component of the ESP that has not yet been constructed. This component, the expansion of the Valley Center Pump Station (VCPS) on Pipeline 2A, is needed to deliver ESP water to the First Aqueduct, where the District’s connections are located. The Master Plan recommends the District coordinate with the SDCWA to assure timely completion of this project.

Chapter Outline

The remainder of this chapter is divided into the following sections:

4.2 Existing Supply Sources 4.3 Possible New Local Supply Sources 4.4 Supply Reliability – Rincon Water Shortage Events and Consequences

4.2 Existing Supply Sources

4.2.1 Existing Conditions and Supply Reliability Challenges

The District currently supplies approximately 10,000 acre-feet of water per year to serve customer demands. Of this amount, approximately 70 percent is potable treated water supply purchased from the SDCWA, and the balance of approximately 30 percent is non-potable recycled water purchased from the City of Escondido.

The District is one of 24 member agencies of the SDCWA. The SDCWA receives most of its water through facilities owned by Metropolitan, which obtains its water from northern California via the California State Water Project (SWP), and from the Colorado River via the Colorado River Aqueduct (CRA).

Historically, Metropolitan and the SDCWA have met the growing water demands of southern California’s growing population and economy by pursuing new sources of supply and new tools for water supply management, including surface and groundwater storage, water transfer and exchange agreements, and most recently seawater desalination development. In addition, water agencies throughout the region have implemented water conservation, water reclamation, and other local supply and water management measures to help balance supplies and demands and to provide a high level of water supply reliability to their customers. Both agencies recognize that their ability to provide long-term water supply reliability in the region will depend heavily on the collective efforts of retail agencies such as the District to develop conservation and local supply projects suitable for their respective service areas.

Despite these collective efforts to provide water supply reliability, drought conditions have at times led to water supply shortages and the need for water use restrictions and rationing to reduce water demands. Periods of widespread water use restrictions have occurred in 1976-77, 1992-93, 2009-11, and most recently in 2013-14.

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4.2.2 Current Water Supply Conditions

The spring of 2013 marked the second anniversary of the District’s lifting of the mandatory water use restrictions it had imposed on its customers for two years beginning in the spring of 2009. At that time, Metropolitan and the SDCWA were facing water supply shortages arising from several years of drought in California and in the Colorado River basin, and from Federal Court rulings restricting the operations of the SWP. The shortage period ended when the winter of 2010-2011 brought above-normal precipitation, restoring water supplies and refilling depleted storage reservoirs across the state.

Subsequent to the wet winter of 2010-11, the winters of 2011-12 and 2012-13 have each produced below-normal precipitation in the key watersheds of the SWP and the Colorado River. Nevertheless, Metropolitan and the SDCWA will have adequate supplies available to serve demands, in part by drawing on storage reserves that were replenished during the wet winter of 2010-11. Should California experience a third consecutive dry winter for 2013-14, it may again be necessary for Metropolitan and the SDCWA to ration supplies, and for the District to impose mandatory water use restrictions on its customers. These conditions highlight the importance of evaluating local water supply and water management options as part of a comprehensive strategy for providing a reliable water supply to the District’s customers.

4.2.3 Imported Supplies

Currently the District obtains 100 percent of its potable water supply from the SDCWA, of which it is one of 24 member agencies. The District’s existing and projected future purchases from the SDCWA are summarized above in Table 4-1.

Metropolitan Water District of Southern California

Metropolitan was formed in 1928 to develop, store, and provide wholesale distribution of supplemental water in southern California for domestic and municipal purposes. Metropolitan is a consortium of 26 cities and water agencies, including the SDCWA. Metropolitan’s main sources of supply are shown in Figure 4-2. Metropolitan obtains its water supplies from two sources. One is the Colorado River via the Colorado River Aqueduct, which Metropolitan owns and operates, and which is shown in black toward the bottom of the map. The other is the State Water Project, owned and operated by the California Department of Water Resources, and to which Metropolitan holds the largest contract for supply.

Metropolitan’s plans for providing supply reliability to its member agencies are summarized in its 2010 Integrated Resources Plan (IRP) and its 2010 Regional Urban Water Management Plan (RUWMP). Metropolitan’s supply reliability goal, as embodied in both these plans, is to provide, in coordination with its member agencies, a mix of imported and local supplies and conservation programs that will provide 100 percent reliability for all full-service demand customers in its service area.

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Figure 4-2 Metropolitan Sources of Supply

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The IRP and RUWMP include a planning buffer to mitigate against planning uncertainties, such as the risk that planned local supply projects may not all be implemented as forecast, or that future demands will be higher than forecast. The planning buffer identifies an additional increment of water that could be developed if needed. The planning buffer is intended to ensure that the southern California region, including the SDCWA and its member agencies, will have adequate water supplies to meet future demands.

Metropolitan’s projected balance of supplies and demands, including the buffer supply, are summarized in Table 4-2. The data in the table is excerpted from Metropolitan’s 2010 RUWMP.

Table 4-2 Metropolitan Projected Supply Capability and

Projected Demands for Normal Year Conditions

(Average of 1922-2004 Hydrologies), in AF/yr

Current Supply Capabilities(1) 2015 2020 2025 2030 2035 In-Region Storage and Programs 685,000 931,000 1,076,000 964,000 830,000 California Aqueduct (2) 1,550,000 1,629,000 1,763,000 1,733,000 1,734,000 Colorado River Aqueduct Colorado River Aqueduct Supply (3) 1,507,000 1,529,000 1,472,000 1,432,000 1,429,000 Aqueduct Capacity Limit (4) 1,250,000 1,250,000 1,250,000 1,250,000 1,250,000 Colorado River Aqueduct Capability 1,250,000 1,250,000 1,250,000 1,250,000 1,250,000 Total 3,485,000 3,810,000 4,089,000 3,947,000 3,814,000 Demands on Metropolitan Firm Demands of Metropolitan IID- 1,826,000 1,660,000 1,705,000 1,769,000 1,826,000 SDCWA Transfers and Canal Linings 180,000 273,000 280,000 280,000 280,000 Total (5) 2,006,000 1,933,000 1,985,000 2,049,000 2,106,000 Surplus 1,479,000 1,877,000 2,104,000 1,898,000 1,708,000

Programs Under Development In-Region Storage and Programs 206,000 306,000 336,000 336,000 336,000 California Aqueduct 382,000 383,000 715,000 715,000 715,000 Colorado River Aqueduct Colorado River Aqueduct Supply (3) 187,000 187,000 187,000 182,000 182,000 Aqueduct Capacity Limit (4) 0 0 0 0 0 Colorado River Aqueduct Capability 0 0 0 0 0 Capability of Proposed Programs 588,000 689,000 1,051,000 1,051,000 1,051,000 Potential Surplus 2,067,000 2,566,000 3,155,000 2,949,000 2,759,000 Source: Metropolitan 2010 Regional Urban Water Management Plan (November, 2010) (1) Represents Supply Capability for resource programs under listed year type. (2) California Aqueduct includes Central Valley transfers and storage program supplies conveyed by the aqueduct. (3) Colorado River Aqueduct includes water management programs, IID-SDCWA transfers and canal linings conveyed

by the aqueduct. (4) Maximum CRA deliveries limited to 1.25 MAF including IID-SDCWA transfers and canal linings. (5) Firm demands are adjusted to include IID-SDCWA transfers and canal linings. These supplies are calculated as

local supply, but need to be shown for the purposes of CRA capacity limit calculations without double counting.

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San Diego County Water Authority

The SDCWA is one of 26 member agencies of Metropolitan. The SDCWA is Metropolitan’s largest member agency in terms of purchases, having purchased approximately 20 percent of all the water Metropolitan delivered in fiscal year 2011-12. The SDCWA delivers treated and raw water into San Diego County through five large diameter pipelines, located in two principal corridors known as the First and Second San Diego Aqueducts. These are shown in Figure 4-3.

The SDCWA was formed in 1944 by the California Legislature to provide a supplemental supply of water as the San Diego region’s civilian and military populations expanded to meet wartime activity needs. Today, the SDCWA has 24 member agencies and supplies between 75 to 95 percent of the water needs of its service area.

To reduce its dependency on Metropolitan and diversify its supplies, the SDCWA in recent years has undertaken several initiatives, including the following:

Carlsbad Seawater Desalination Water Purchase Agreement: To further help diversify regional supplies, the SDCWA has entered into a Water Purchase Agreement under which it agrees to purchase up to 56,000 AF/yr of desalinated water from a plant now under construction in Carlsbad by an affiliate of Poseidon Resources, Inc. The SDCWA anticipates the plant will be operational beginning in 2016.

Imperial Irrigation District Transfer: The SDCWA signed a Water Conservation and Transfer Agreement with Imperial Irrigation District (IID) in 1998. Through the transfer agreement, the SDCWA is purchasing water from IID at volumes that will gradually increase year-to-year, reaching 200,000 AF/yr in 2021. The water is physically delivered to San Diego via Metropolitan’s CRA.

All-American and Coachella Canal Lining Conserved Water: In 2003, as part of the execution of the Quantification Settlement Agreement on the Colorado River, the SDCWA was assigned rights to 77,700 AF/yr of conserved water from projects to line

Figure 4-3 Delivering Water to the District The exhibit shows the northern half of the SDCWA system. The District receives treated water from the First Aqueduct pipelines, just north of their intersection with the Crossover pipeline.

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the All-American and Coachella Canals. These projects are now complete and the SDCWA is receiving this water. As with the IID transfer water, the water is physically delivered to San Diego via Metropolitan’s CRA.

Water Transfer and Banking Programs: In addition to the above, the SDCWA has entered into water transfer and water banking arrangements with Central Valley area agricultural agencies and groundwater storage interests. These projects are designed to make additional water available to the SDCWA during dry-year supply shortages from Metropolitan.

The SDCWA’s supply planning is most recently documented in its 2010 Urban Water Management Plan (UWMP) issued in June 2011. Table 4-3 summarizes the SDCWA’s verifiable water supplies for future years, as documented in its 2010 UWMP.

Table 4-3 Projected Verifiable Water Supplies for SDCWA Service Area

– Normal Year Conditions

(in AF/yr)

2015 2020 2025 2030 2035

SDCWA Supplies

IID Water Transfer 100,000 190,000 200,000 200,000 200,000

ACC and CC Lining Projects 80,200 80,200 80,200 80,200 80,200

Proposed Regional Seawater Desalination 0 56,000 56,000 56,000 56,000

Subtotal 180,200 326,200 336,200 336,200 336,200

Member Agency Supplies

Surface Water 48,206 47,940 47,878 47,542 47,289

Water Recycling 38,660 43,728 46,603 48,278 49,998

Groundwater 11,710 11,100 12,100 12,840 12,840

Groundwater Recovery 10,320 15,520 15,520 15,520 15,520

Subtotal 108,896 118,288 122,101 124,180 125,647

Metropolitan Water District Supplies 358,189 230,601 259,694 293,239 323,838

Total Projected Supplies 647,285 675,089 717,995 753,619 785,685

Total Demands with Senate Bill X7-7 Conservation 647,285 675,089 717,995 753,619 785,685

Source: SDCWA, 2010 Urban Water Management Plan (June 2011)

SDCWA Emergency Storage Project

The SDCWA aqueduct facilities shown in Figure 4-3 connect to treated and raw water feeds from Metropolitan facilities at Lake Skinner, in southern Riverside County. Recognizing the potential for a large earthquake or other emergency condition to cause a sustained outage of the pipelines, the SDCWA in the early 1990s began planning for its ESP to safeguard against this risk.

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The primary objective of the ESP is to develop an emergency storage and delivery system able to provide 75 percent of two-month peak water demand for all water users in the SDCWA service area. This is referred to as the “two-month” emergency event. The major facilities of the ESP include the Olivenhain Reservoir and pipeline, the Hodges-Olivenhain Connection, the San Vicente Dam enlargement, and San Vicente–Miramar Pipeline, all as shown in Figure 4-4.

Although all of the largest components of ESP facilities are now completed or nearing completion, the SDCWA has not yet initiated construction of the key project component necessary to provide ESP service to the southern half of the First Aqueduct, where District connections are located. This component is the expansion of the SDCWA’s VCPS on Pipeline 2A. Absent the VCPS expansion, the SDCWA is unable to provide full ESP deliveries to this reach of the First Aqueduct.

District Connections to SDCWA

The District receives water from the SDCWA through two treated water connections (turnouts) to the SDCWA’s First Aqueduct. Table 4-4 lists the location, capacity, and the average annual delivery to the District for each connection.

Table 4-4 SDCWA Connections

Connection Location Source Rated Capacity Projected Ultimate Delivery cfs MGD Average MGD Maximum MGD

RIN 1 1071 ½ Vista Ave, Escondido

First Aqueduct, P/L 2 (western) 30 19 3 12

RIN 3 1041 Hubbard Ave., Escondido

First Aqueduct, P/L 1 (eastern) 40 26 3 12

Combined 70 45 6 12(1) Source: District data cfs = cubic feet per second; MGD = million gallons per day (1) The District’s Maximum day demand of approximately 12 MGD could be taken from either of the District’s

connections, or a combination of the two (e.g., 6 MGD from each connection).

Figure 4-4 Major Facilities of the ESP System The exhibit shows the major components of the SDCWA’s Emergency Storage Project. A key component of the system required for ESP service to the District -- the Valley Center Pump Station expansion -- has not yet been completed by the SDCWA. The Master Plan recommends the District coordinate with the SDCWA to ensure timely completion of this facility.

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Certain aspects of the District’s aqueduct connections deserve note:

Surplus Capacity / Operational Flexibility: As shown in Table 4-4, the District has connection capacity to the SDCWA aqueduct system that significantly exceeds its average annual demands. This surplus capacity provides operational flexibility to accommodate peaking and to allow for one or the other of the District’s two connections to be off-line.

Connections to First Aqueduct Only: The District’s two connections are both supplied by the First Aqueduct. This means that during shutdowns of the First Aqueduct the District has no ability to receive supply from the Second Aqueduct, and instead is reliant on its own treated water storage, and on its interconnections with its neighboring agencies, in particular the City of Escondido.

4.2.4 Recycled Water Supplies

The District’s current recycled water supply consists entirely of purchases from the City of Escondido. The District anticipates that these purchases will increase modestly during the planning horizon, as shown in Table 4-1. These purchases are governed by two separate water purchase agreements between the District and the City of Escondido, one for supply to the Sempra Energy power plant off Citracado Parkway in the ERTC, and one for supply to all of the District’s other recycled water customers. Further information on the City of Escondido recycled water supply source, and on the terms, conditions, and limitations of the two purchase agreements, is provided in Chapter 6.

In addition to its current recycled water supply from the City of Escondido, the District anticipates an additional source of recycled water will become available from the planned Harmony Grove Village Water Reclamation Facility, which will serve a major residential development currently under construction in the Harmony Grove Village portion of the District service area. This projected new supply is shown in Table 4-1. This water reclamation facility will be constructed by the developer as a condition of development, and will be owned and operated by the County of San Diego. Recycled water produced at the plant will be used within the development for irrigation and other non-potable uses, and any surplus water will be delivered to the District’s recycled water distribution system. Further information on the projected supply is provided in Chapter 6.

The District’s recycled water distribution system is shown in Figure 4-5.

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Figure 4-5 District Recycled Water Distribution System The exhibit shows the District’s existing recycled water distribution system, along with the planned expansion underway as part of the Harmony Grove Village development. Additional information on the District’s recycled water supply and possible future expansions is provided in Chapter 6.

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4.2.5 Interconnections with Neighboring Agencies

In addition to its regular potable supply from the SDCWA, the District also maintains service interconnections with its neighboring agencies, including the VID, City of Escondido, Valley Center Municipal Water District (VCMWD), and Vallecitos Water District. These interconnections allow the District to be supplied by its neighbors during times when its supply from the SDCWA is interrupted due to a maintenance shutdown of the First Aqueduct or other causes. In some cases, the interconnections also allow the District to reciprocate by providing water to a neighboring agency should the need arise. As further described in Section 4.4, these interconnections play an important role in helping the District provide water supply reliability during SDCWA aqueduct outage events.

The District’s interconnections with neighboring agencies are numerous. These interconnections are discussed in more detail in Chapter 5, with a detailed list presented in Appendix D, Table D-1.

Rincon-Escondido Settlement and Operations Agreement of 1994

By far the most important of the District’s interconnections are those with the City of Escondido. These are important both because of the long length of border that the District shares with the City of Escondido, and because of the City of Escondido’s ability to provide a backup supply of treated water independent of the SDCWA. The City of Escondido’s raw water storage in Lake Wolford and Dixon Lake, together with the ability to treat this water at the Escondido-Vista Water Treatment Plant, provides this capability.

The obligations of the City of Escondido and the District to provide inter-agency services to their customers are defined in the Rincon-Escondido Settlement and Operations Agreement dated December 1, 1994. Among the Agreement’s many provisions, Section 13 states a “cooperative intention” that the City of Escondido will provide supply assistance to the District during aqueduct interruptions, but does not fully commit the City of Escondido to do so.

It appears there was a more recent attempt to clarify these issues as part of the February 1999 Recycled Water Purchase Agreement between City of Escondido and the District (Sections 12 and 13). The Master Plan recommends the District review the language contained in both the 1994 and 1999 Agreements and consider opportunities to work with the City of Escondido to further clarify the provisions governing water shortage events and consolidate these protections into a refined version of the 1994 Agreement.

4.3 Possible New Local Supply Sources As shown in Table 4-1 and Figure 4-1, the District plans to develop approximately 900 AF/yr of new local supply, and amount designed to be sufficient to offset projected growth in potable demands. This development of new local supplies is consistent with the District’s goal of holding its purchases from the SDCWA flat, with no increase.

New local supplies could consist of additional increments of non-potable recycled water via expansion of the District’s recycled water distribution system, groundwater, indirect- or direct-potable recycled supplies, or a combination of these. These potential supplies are further described below. For planning purposes, and for use in projecting capital spending

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requirements, the Master Plan assumes the new local supply will be additional recycled water, supplied to existing irrigation customers and others with large landscape water demands in lieu of their current potable supplies. This same capital account developed for recycled water expansion could instead be applied to one or more alternative local supply options should future studies indicate such a supply option is preferable to expansion of the recycled water system.

Expansion of the Recycled Water Distribution System

As described in Chapter 6, the District has identified the potential to develop 150 AF/yr of new recycled water use from proposed development and an additional 720 AF/yr of existing and future irrigation and industrial uses in its service area to recycled water. Many of the customers that make up the 720 AF/yr market total are beyond the reach of the District’s existing recycled water distribution system. Serving these customers would require the expansion of the recycled water distribution system, and the retrofitting of customer water systems to provide for the conversion from potable to non-potable supply. Additional detail on the potential expansion of the recycled water system is provided in Chapter 6.

Local Groundwater

The District service area contains only very limited groundwater resources. Historically, the District has not developed local groundwater supplies due to constraints of costs, water quality, and environmental degradation concerns. In recent years however, as the costs of imported water have risen considerably, the District and other agencies have begun re-examining the potential for groundwater development. The District in 2012 completed groundwater investigations related to its evaluation of a possible project in the Harmony Grove Village area, but these investigations showed that the quantity, quality, and reliability of the available resource were all problematic. Subsequently, the District determined to suspend its investigations of the project.

The United States Geological Survey (USGS) is currently constructing a test well in the Hodges basin, just south of the District’s ID-A service area, as shown in Figure 4-6. The test well is part of a broader hydrogeological investigation by USGS of San Diego area groundwater resources. The USGS is conducting the Hodges test well work in cooperation with the City of San Diego, which owns most of the property overlying the basin. According to USGS, the test well is designed to monitor water levels and water quality in the river-channel deposits, the weathered granitic bedrock, and the underlying hard granite. The District will monitor the results of the investigation and utilize the information obtained in its planned future evaluations of groundwater resources within its service area.

Figure 4-6 USGS Test Well in Hodges Basin The USGS is undertaking investigations of San Diego area hydrogeology in an effort to assist area water districts in evaluating possible new sources of supply.

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4-14 June 2014

The Master Plan recommends the District undertake a review of groundwater opportunities in its service area as part of a comprehensive evaluation of alternatives for development of its planned new local supplies.

Indirect or Direct Potable Reuse

Potable reuse is the use of advanced-treated wastewater as potable supply. Indirect potable reuse (IPR) implies the delivery of advanced treated wastewater to a groundwater basin or large storage reservoir for in-situ treatment, blending, and eventual withdrawal, at which time the water typically receives an additional round of conventional treatment prior to distribution as potable supply. Direct potable reuse (DPR) implies the direct delivery of advanced treated water for potable use.

The California Department of Health Services (CDPH) has issued draft regulations governing the design and permitting of IPR projects, and some local agencies have implemented IPR projects. The most notable such project is the Orange County Water District’s Groundwater Recovery Project, which provides approximately 70 MGD of advanced treated wastewater for recharge of the Orange County Groundwater Basin. The California legislature has directed that CDPH issue final regulations for IPR via groundwater basins by December 31, 2013, and issue similar regulations for IPR via surface storage reservoirs by December 31, 2016. CDPH regulations do not currently allow for DPR projects, but the agency will report to the legislature on the potential for such authorizing regulations by December 31, 2016.

During 2011 and 2012 the District undertook evaluations for the Rincon Water Factory project, an IPR project concept involving the injection of advanced treated wastewater into the Harmony Grove Village area groundwater and subsequent withdrawal and treatment of the water for use as potable supply. However, hydrogeologic investigations indicated the groundwater basin lacked sufficient yield and storage for the project to work, and at present the District has suspended the planning effort.

The City of Escondido is currently investigating the potential for IPR or DPR projects using effluent from its Hale Avenue wastewater treatment plant, with possible intermediate storage in Lake Wohlford or the San Pasqual groundwater basin. The District is monitoring the City of Escondido’s efforts.

The Master Plan recommends the District undertake a review of IPR and DPR opportunities as part of a comprehensive evaluation of alternatives for development of its planned new local supplies.

4.4 Supply Reliability – Rincon Water Shortage Events and Consequences

An assessment of the District’s supply reliability begins with consideration of the types of events that could result in water supply shortages to the District. Possible shortage events facing the District include the following:

1. Drought and other prolonged reductions of imported water supplies: Imported water supply shortages, whether caused by drought or other factors, may result in

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reduced deliveries to the District under the terms of the SDCWA’s Drought Management Plan.

2. ESP Event: An ESP event is an emergency outage of the San Diego aqueduct pipelines, such as could be caused by a major earthquake on the Elsinore Fault. The SDCWA’s ESP Facilities are designed to provide a minimum 75 percent retail service capability for the estimated two-month period required for repair of the aqueducts.

3. First Aqueduct Shutdown (Treated Water): The District’s two treated water connections to the SDCWA aqueduct system are each supplied by the First Aqueduct. The First Aqueduct for most of its reach contains two pipelines, Pipeline 1 and Pipeline 2, but the two pipelines are interconnected in places and do not operate independently.

As with all the SDCWA pipelines, the First Aqueduct pipelines are subject to occasional planned shutdowns for inspection, maintenance, installation of new connections, and other causes. These shutdowns have typically occurred approximately once every other year. During First Aqueduct shutdown events, the District historically has relied on its treated water storage and on its interconnections to the City of Escondido and VID in order to maintain deliveries to its customers.

Table 4-5 summarizes the types of water shortage events that could affect the District, the assets currently available to the District to address the shortage event, and the consequences of each event to the District with existing assets.

Table 4-5 Summary of Potential Shortage Events and Consequences

Event Frequency Duration Existing Response Assets Consequence 1) Drought

(or other prolonged reduction in imported water supplies)

Unknown (Imported delivery reliability is dependent on State, MWD, and SDCWA actions)

1 year and longer

a) State, Metropolitan, and SDCWA response capabilities

b) District drought response ordinance and rate structure

c) SDCWA Carry-Over Storage Project (San Vicente Reservoir expansion) (upon completion in 2014)

d) District Agreement with Escondido

Significant (Cutbacks to District treated water customers at same level as SDCWA cutbacks to District)

2) ESP Event (Earthquake-induced or other failure of all or most of the San Diego Aqueduct pipelines)

Low (on the order of one event per 100 years)

2 months (per ESP design criteria, based on aqueduct repair time estimates)

a) SDCWA ESP facilities and Twin Oaks WTP (upon completion of VCPS)

b) District Treated Water Storage c) District Intertie and Agreement

with Escondido d) District intertie with VID e) District Water Shortage

Contingency Plan

Moderate to Significant (No SDCWA deliveries for 4-7 days; thereafter deliveries at minimum 75% level of service)

3) Treated Water Shutdown of First Aqueduct (planned event)

Biannually (approximately)

10 days (Dec. – Mar. window)

a) District Treated Water Storage b) District intertie and Agreement with

Escondido c) District intertie with VID

Minor to Moderate (Possible drawdown of District storage to below preferred levels)

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Discussion and Recommendations

The information in Table 4-5 suggests the District is well positioned to respond to and manage interruptions and shortages of imported water supplies. Over the past decade, the SDCWA, on behalf of the District and the other SDCWA member agencies, has made significant investments in regional supply reliability through the ESP, the Twin Oaks Water Treatment Plant (WTP), the Aqueduct Protection Program, the Carry-Over Storage Project, and other projects, and these benefit the District as reflected in the table, or will upon final completion of the ESP as noted previously. The District also benefits from its interconnections with its neighboring agencies, especially the City of Escondido with that agency’s access to raw water storage and treatment at the Wolford Reservoir and Escondido WTP. Moreover, since VID owns a portion of the Escondido WTP, the District could further access additional water supply directly from VID.

As described above, the Master Plan recommends the District pursue the following improvements relative to its supply reliability:

The Master Plan recommends the District review the 1994 Agreement and consider opportunities to work with the City of Escondido to clarify the provisions governing water shortage events.

The Master Plan recommends the District investigates with VID the opportunities and constraints to increase access to water supply wheeled through the Vista Flume. This supply will likely be accounted as SDCWA untreated water, treated at the Escondido WTP, should an agreement be reached for a nominal supply. It would unlikely have considered local water from VID’s local supply (Lake Henshaw) and therefore not be considered part of the offset goal.

The Master Plan recommends the District coordinate with the SDCWA to assure timely completion of the ESP facilities needed to provide emergency service to portion of the First Aqueduct that supplies the District.

Implications for Treated Water Storage Requirements

The District’s planning criteria call for it to maintain a three day emergency reserve of treated water storage. This storage reserve is in addition to operational and fire-flow storage reserves. The District’s treated water storage criteria are summarized in Table 4-6.

As shown in the table, under 2013 demand conditions the District’s actual storage capacity is at 99 percent of its criteria goal. The small deficit is well within the range of forecast accuracy. By 2035 the projected increase in potable demands will increase the deficit to a more significant level. As discussed in Chapter 5, the District will plan for the construction of an additional storage tank as needed depending on actual future demand and development conditions.

Relative to supply reliability planning, the District’s current three day emergency reserve criterion appears to provide a suitable balance of reliability, cost, and water quality considerations. If the only supply reliability assets available to the District during a supply interruption event (see Table 4-5) were its treated water storage tanks, then three days emergency reserve would likely be deemed inadequate by the District and its customers. However, because the District has access to emergency supplies from neighboring agencies as noted above, its treated water storage is only one part of a package of assets the District can

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utilize to maintain service reliability during supply interruptions. In this sense, increasing the emergency storage reserve would provide only relatively minor improvements in the District’s response capability for a large part for the Rincon service area. When weighed against the costs of additional storage, and against the water quality challenges of storing treated water for several days duration, the Master Plan sees no need at this time for the District to alter its emergency storage criterion. However, as development occurs along the western fringes of the District and more remote from treated water storage, the District may want to review the need for storage on a case-by-case basis and also explore the possibilities of an interconnection with neighboring Olivenhain Municipal Water District.

Table 4-6 Summary of District Treated Water Storage Criteria

Storage Type Volume

(as duration)

2013 Volume Required(1)

(MG)

2035 Volume Required(2)

(MG) Description / Notes

Emergency 3.0 average days 18.7 20.9 Emergency reserve for use during supply interruption

Fire Flow 2 at 2,500 gpm for 2 hours, for each of ID-1 & ID-A 2.4 2.4 District policy is to provide facilities to

supply two concurrent fires

Operational ID-1: 0.33 average days ID-A: 0.40 average days 2.1 2.4 Operational storage addresses time-

of-day variation in demands Total Storage Volume per Criteria 23.2 25.7 Actual Existing (2013)(3) – Percent of Criteria Total

22.9 99%

22.9 89%

R-1A Reservoir volume not included in total

Surplus (Deficit)(4) (0.3) (2.8) 2013 volume deficit is not significant. 2035 deficit will require new storage.

MG = million gallons; MGD = million gallons per day (1) 2013 Volume based on average potable demand of 7,000 AF/yr, or 6.25 MGD (2) 2035 Volume based on average potable demand of 7,900 AF/yr, or 7.05 MGD. Future potable demand could be

less if the District elects to pursue an expansion of its recycled water distribution system as part of its New Local Supply initiative.

(3) Potable storage volume does not include the R-1A Reservoir (3.1 MG), which is planned to be converted to the recycled water system.

(4) The totals and surplus/deficit data shown here is for the District system as a whole, and does not account for the distribution of storage among pressure zones. See Chapter 5 for additional detail on treated water storage.

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5-1 June 2014

5 Potable Water System

5.1 Summary

The District continues to provide water service to the two geographically separated areas

known as ID-1 and ID-A. Under normal water supply and demands, both systems perform within

the District’s design criteria. Major water facilities, including storage tanks, pump stations, and

large diameter transmission mains are in good condition.

Since the 2005 Water Master Plan, water use in the District has declined by approximately 15

percent. The result is the District’s water storage and transmission system does not require

substantial upgrades due to capacity related issues. One new potable reservoir is

recommended in the CIP for future growth and increased fire protection.

The Master Plan finds new water system projects are driven primarily by enhancing overall system

reliability within and between the Improvement Districts. Should the District implement the new

dual fire flow requirement for the existing system, substantial upgrades would be needed. The

Master Plan assumes these upgrade projects would be phased in as part of future replacement

pipeline projects, due to the magnitude of cost and impact to rate payers, to fully upgrade the

water system due to the new fire flow standard.

Chapter 5 presents an evaluation of the existing water system including both ID-1 and ID-A. Future water system requirements including storage and reliability are presented, which form the basis for the CIP, in Chapter 7.

The remainder of the chapter is organized into the following sections:

5.2 Existing Water Distribution System 5.3 Existing Water System Hydraulic Model and Analysis 5.4 Fire Flow Impact Analysis 5.5 Storage and Pump Stations 5.6 Future Water System and Reliability Projects

5.2 Existing Water Distribution System The District continues to provide water service to the two geographically separated areas; ID-1 covering approximately 12 square miles along the western boundary of the City of Escondido and ID-A on the southeast portion of the City of Escondido which encompasses approximately 2 square miles. A hydraulic profile of the existing water system is presented in Figure 5-1, which illustrates the varying hydraulic gradients, water supply sources for the two water systems, water storage tanks, and booster pump stations. Water system pressure zones and major facilities for ID-1 and ID-A are presented in Figure 5-2.

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Rincon del Diablo Water Master Plan

April 2014

5,000

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Legend

PipesID-1 SOUTH

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ID-1 NORTH

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ID-1 South

ID-A

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June 2014


5-4 June 2014

5.2.1 ID-1 (North and South) Water System

Referring to Figure 5-1, ID-1 is supplied by the First Aqueduct from two flow control facilities (FCF). The District generally supplies ID-1 North from FCF No. 1 and ID-1 South from FCF No. 3. Due to reduced treated water demands on the SDCWA system, one of the pipelines in the First Aqueduct is occasionally shut down for extended periods to maintain treated water quality. As a result, the District is reduced to a single source of supply due to long supply lines to ID-1 North or ID-1 South. The District would like to explore a better integration these two systems, especially near the FCFs.

The storage reservoirs in ID-1 North (R-3A and R-3B) serve to provide hydraulic control for the Aqueduct water supply. A smaller booster pressure zone (Rockhoff Zone), with storage, is located in the far north. In this area the District has the ability, in emergencies, to take water from the VID Vista Flume through an 8-inch connection. A small triangular piece in the northeast corner of the District (known as the Laurashawn area) is served by VCMWD, but will soon be converted to the District through an extension of a new District water main. The District will maintain an emergency intertie with VCMWD to supply ID-1 North by gravity. Overall, ID-1 North performs well under normal operating water conditions.

ID-1 North and South are operated at slightly different hydraulic gradients, an important hydraulic distinction for operations. This allows for better flow control from the Aqueduct system and actually simplifies District operations. In order to hydraulically separate the areas, a flow control valve, known as the Metcalf Flow Control Valve (FCV) (a 20-inch plug valve) is throttled to hydraulically separate the system. By throttling and adjusting the valve position (number of turns) the District can also supply excess SDCWA water ordered in ID-1 North to ID-1 South.

ID-1 South is supplied by either the Metcalf FCV and/or FCF No. 3. Hydraulic control is established by the R-1A and R-1B tanks, which are slightly lower (by 42 feet) than ID-1 North tanks. ID-1 South includes a total of four storage tanks, with one tank (R-5) being nearly 40 feet lower. This has resulted in challenges in maintaining water quality in R-5 and forces the District to manually open and close system valves to force water turnover. The District desires to automate and remotely control this operation in the future. Also, the District plans to convert the potable R-1A Tank to recycled water to serve the planned Harmony Grove Village development.

ID-1 South has a wide range of elevations served with some areas exceeding 150 psi and some with pressures below 50 psi. Several of these lower pressure areas include District owned and operated booster pump stations to increase domestic service pressures by approximately 50-75 psi. A total of three boosted pump zones, which were by built by developers and are now operated by the District, serve these higher areas. The District would like to explore the possibilities of reducing the size of the areas, thereby reducing pumping costs. Fire flows are still delivered by the ID-1 South system through check valves to these small closed zones. One of the booster stations is equipped with a single fire flow pump.

The District’s primary challenge in ID-1 South is turning over all four reservoirs sufficiently, especially with one tank being significantly lower. Improved looping and redundancy in a few areas would strengthen the system. ID-1 South will see significant infrastructure changes and demand increases with the development of Harmony Grove Village and neighboring projects, which should facilitate tank turnover in the lower demand months.


5-5 June 2014

5.2.2 ID-A Water System

The ID-A water system is entirely supplied by the City of Escondido’s water system (see Figure 5-1). Treated water supply originates at the City of Escondido’s WTP and is conveyed to the City of Escondido’s A-3 867 Pressure Zone, where water is supplied through a metering facility to the District ID-A Tanks (R-2A, R-2B, and R-2C) and establishes an 829 Pressure Zone. The District historically manually operates a flow control valve based on water levels in the tanks and is in the process to shift to a remote telemeter controlled valve. The goal is to avoid large flow changes and pressure spikes on the City of Escondido potable water system.

The ID-A water system is predominately built out and operates well within the District’s design criteria. A few areas served by dead-end water mains could be enhanced with looping in the future.

5.2.3 Existing Water System Field Review

As part of the 2013 Master Plan, site visits were made to a number of major water facilities including the SDCWA FCFs, storage tanks, and booster pump stations to better understand their performance and preliminarily assess the physical condition of major infrastructure. A summary of observations is provided below:

SDCWA FCFs: The District’s FCFs are housed in relative older structures that are owned and maintain by the SDCWA. Both FCFs are more than adequately sized based on existing and future District water demands.

A minor operating issue exists at FCF No. 3 due to its high elevation on Hubbard Hill in the City of Escondido and pressure head is broken at the District connection causing, on occasions, some entrapped air in the District supply line. It is important that adequate air release be maintained on the District’s transmission main.

SDCWA FCF 1 is housed in this building and primarily serves ID-1 North.

SDCWA’ FCF 3 does break head as shown by the zero downstream pressure. Therefore, it is important that adequate air release be maintained on the District’s transmission main.


5-6 June 2014

Storage Tanks: The District operates and maintains all steel tanks which have been constructed over various times the past few decades. The District recently contracted out annual inspection, maintenance and rehabilitation of its steel tanks. Observations from the site visits include:

1. The steel tanks appear in excellent condition based on the recent contractor work performed and should serve the District well over the next 20 to 25 years with normal maintenance.

2. The District’s co-locating two tanks on many of its sites offers the District added flexibility to take one tank out of service for maintenance and not significantly impact system service pressures.

3. Each site maintains excellent access for routine maintenance and paved access roads are in very good condition.

4. The current tank sites are limited in available land and elevation to allow for further expansion of storage. Appendix C includes several reservoir lay-outs, requested by the District as part of the master planning process, at existing sites owned by the District for potential future storage considerations.

An example of a District steel tank is shown below from the ID-A water system. Most of the tanks range from 24 to 40 feet in height.

Water Pump Stations: Each of the three closed zone booster pump stations was visited in the ID-1 South area to observe operations and conditions. These small pump stations primarily boost domestic water pressure; two of the pump stations do not have fire flow capacity. The District uses a package pump system manufactured by Grundfos (see next page) that appears to be in excellent condition, performs well, and there have been no reported major problems.

In the northern portion of ID-1 (refer to Figure 5-1 hydraulic profile) the District pumps water from the ID-1 North system to the R-4 Reservoir via the Rockhoff Pump Station. As shown below, the Rockhoff Pump Station is a District facility that is nearing its useful life and should be replaced with a new station, including new system controls and more efficiently sized pumps. A new system should also include dedicated pumping units for increased supply from VID. The Grundfos package

Typical Grundfos package booster pump station used by the District for boosting domestic pressures.

The Rockhoff Pump Station should be upgraded with new pumps and piping and system controls.

Typical District steel tank (R-2C is shown above) in excellent condition with good access for routine maintenance.


5-7 June 2014

system may be an excellent application for this replacement project.

As part of the field visit, District staff also shared an excellent example of water system operations flexibility and emergency preparedness, as the District owns and operates a custom-made trailer mounted booster pump station, shown below. This system can be used anywhere in the District to pump water in an emergency and has been successfully used during SDCWA shut downs to move water from the City of Escondido. An excellent example of providing added redundancy and flexibility within District operations.

City of Escondido Interties: There are over thirty interties with the adjacent water agency, the City of Escondido. The intertie locations are summarized in Appendix D, Table D-1. Many of these connections are normally open and District water exchanges (City of Escondido to District or District to the City of Escondido) are either metered at the intertie or tracked through individual customer water bills. The remainder of the interties are normally closed valves which are opened manually only during emergencies. Two of the interties are near FCF No. 1 and FCF No. 3, which can be used to supply the City of Escondido Clearwell Zone via the First Aqueduct during a loss of supply from the Escondido-Vista WTP.

5.3 Existing Water System Hydraulic Model and Analysis

A computer water model of the District’s water system was updated to reflect current District

water demands and operations and calibrated to actual field conditions. The new GIS based

InfoWater model will be a valuable tool for the District engineering staff to use in operating and

managing the water system.

The existing water system was evaluated based on the design criteria and newly calibrated

InfoWater model. Under maximum day, peak hour and nighttime demands the District water

system demonstrated minimal pressure swings and adequate refill rates for all storage tanks. The

impact of new fire flow criteria is addressed separately in Section 5.4.

A new computer water model of the District’s ID-1 and ID-A water systems were developed in the Infowater program by Innovyze. An important update included water demands from 2009 water billing data, which was considered representative of the Distict’s baseline present-day existing water demand. Billing accounts were received from the District with geocoded locations and spatially joined to the nearest model node. This allows for improved model accuracy with better spatial distribution of water demands. In additon, this will facilitate updates by District staff in the future should annual water use dramatically change.

The District’s portable pumping system that can be mobilized to any location in the District.


5-8 June 2014

In order to validate the model, calibration data was collected from pressure loggers and system operations data collected over a 5-week period from February 14 through March 21, 2013. A comparison of recorded pressures in 2013 with model pressures from a steady state simulation with average demands is provided in Appendix E. Model pressures at all data logger locations were within the recorded pressure range. It is noted that reservoir water levels are set at approximate mid-points in the model for steady-state conditions, and therefore may not be exact representations of actual water levels during the pressure monitoring period.

For extended period calibration, a composite time-of-day demand curve was first determined for the District water distribution system based on collected SCADA data of reservoir water levels during the 5-week period from February 14 through March 21, 2013. From reservoir water levels and tank dimensional data, the hourly volume of water entering or exiting each tank was calculated. The hourly system demand was then calculated based on the total net flow rate into or out of the tanks (negative flow for tanks filling, positive flow for tanks emptying).

In summary, the updated Infowater model represented the field conditions and should serve as a valuable tool for the District in conducting water system analyses.

In order to assess performance of the existing distribution system under maximum day demand conditions, a 24-hour extended period simulation was performed with existing average demands peaked by a maximum day diurnal curve. Under a 24-hour maximum day, which captures both

Tank levels and cycling over three-day period in the 2013 winter. The District occasionally forces tanks to drain and empty to reservoirs to empty to improve water quality as shown by R-4 and R-3 tank level patterns.


5-9 June 2014

a peak hour demand and low nighttime demand for tank filling, the existing ID-1 and ID-A water systems demonstrated minimal pressure swings and the ability to refill tanks.

Figure 5-3 presents the maximum day pressures in the District water system, which mostly exceed District minimum criteria. The reported low pressure areas are at high elevations generally near tanks where there are no water services. This scenario did not include fire flow analyses, but demonstrates the adequate capacity of storage and transmission throughout the District under normal demand conditions.

5.4 Fire Flow Impact Analysis

The District’s new policy to meet simultaneous fire flows, coupled with the California Fire Code

increase to 2,500 gpm for residential high and very high fire severity zone areas, results in

maximum fire flow requirements of 5,000 gpm in areas of the District that were previously

designed and constructed for 1,500 gpm.

One consequence of the Fire Code increase to 2,500 gpm fire flow in residential areas is the

District will now have to require a new minimum pipeline of 8-inch in size. The District maintains

over 100,000 linear feet of 6-inch water main which many would be undersized by current fire

flow standards. It is recommended that as part of the District’s annual replacement program,

the 6-inch replacement project should be upsized to an 8-inch. All new development should be

designed with minimum 8-inch pipelines.

A second consequence of the dual fire flow requirement is the need to deliver up to 5,000 gpm

to various areas of the District. All new development is being evaluated under the new design

criteria. One new water storage tank will be required in the western area of the District to deliver

the flow and pressure to support future planned developments. The existing water system was

evaluated by assuming a relatively conservative distance between the dual fire flows within a

pressure zone.

The approach to testing the existing water system’s ability to deliver fire flow was to first estimate the available flow at the minimum residual pressure of 20 psi. A global fire flow analysis was therefore performed with the existing system hydraulic model to determine the available fire flow at each node with a 20 psi residual pressure. The fire flow simulation was run with maximum day demands and water levels at reservoirs set to half full. Under dual fire flow criteria the SDCWA connections were assumed in service.

Results from the fire flow simulation indicate that most areas in the distribution system can supply a flow of at least 2,500 gpm because of the proximity to transmission and storage facilities. However, the fire flow analysis also identified numerous small diameter pipelines that cannot provide a single 2,500 gpm fire flow. Many of these are 6-inch in diameter, especially dead-end 6-inch diameter pipelines and all 4-inch mains. It is recommended that all 4-inch diameter pipelines that supply fire hydrants be replaced with 8-inch diameter pipelines as high priority projects (a total of 3,100 feet). The upgrade pipelines are included in the CIP and are shown on Figure 7-1.

LA VERONA

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R-5KT

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Peak HourPressure Results

Figure 5-3

Rincon del DiabloWater Master Plan

June 2014

LegendPressure (psi)

less than 2020-6060-80greater than 80

5,000

Feet

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5-11 June 2014

In order to evaluate the newly adopted dual fire flow criteria, a 2,500 gpm fire flow was assumed to be located (placed) along the backbone transmission system in each major pressure zone, while a global fire flow analysis was performed to simulate simultaneous fire flow conditions. It was evident that locating the dual fire flows in close proximity to one another within the existing water distribution system resulted in major system deficiencies.

Results from the dual fire flow scenarios were reviewed to evaluate whether the existing facilities could serve simultaneous fire flow demands. In summary, as long as one of the fire flows was assumed on a transmission main (12-inch or 16-inch) within a pressure zone, a good portion of the District could meet the dual fire flow requirement. However, if the dual fire flows were modeled in close proximity to one another in many cases the minimum pressure could not be met. For CIP planning purposes and recommended existing water system upgrades the following assumptions were made to meet the new dual fire flow criteria:

All 4-inch and 6-inch water mains served by fire hydrants or looped should be replaced with a minimum 8-inch pipeline and should be programmed as part of annual replacement program.

Where possible, long dead-end 8-inch mains should be looped.

The District should review the distance between dual fire flows and set a criteria as future CIPs and the extent pipeline upgrades will be sensitive to the assumption.

5.5 Storage and Pump Stations

The District will require one new storage tank (R-7) as result of: (1) the ability to meet existing and

future dual fire flows in the western area of ID-1; (2) increase in water demands with planned

development; and (3) the conversion of the R-1A Tank to recycled water.

The District’s water pump stations have sufficient capacity to meet the respective pressure zone

demands. The Rockhoff Pump Station appears oversized for its pressure zone and would benefit

from more efficient capacity pumps when the station is replaced. The new pump station should

also be designed for increased deliveries from the VID flume into the ID-1 North Zone.

Reservoir storage criteria is based on providing operational, fire and emergency storage within each major zone as outlined in Chapter 2 design criteria. Table 5-1 calculates the required storage for the water distribution system based on existing demands.

Based on existing storage criteria, the District has sufficient storage capacity to meet current demands. The Rockhoff R-4 Reservoir has a 0.3 MG deficit due to the assumptions of dual fire flow storage of 2,500 gpm fire flow capacity for two hours (Table 5-2). A portion of this deficient fire storage could be supplied by the excess pumping capacity at Rockhoff Pump Station.


5-12 June 2014

Table 5-1 Existing Storage Analysis

Reservoir

Average Annual Demand

Operational (33-40% of AAD)

Fire (2 hours, dual fire)

Emergency (3x AAD)

Total Storage Required

(MG)

Existing Storage

(MG)

Surplus/ (Deficit)

(MG) (gpm) (MGD) ID-1 North R-3A R-3B

911 1.3 0.4 0.6 3.9 5.0 3.1 2.8 5.9

0.9

Rockhoff R-4 72 0.1 0.0 0.6 0.3 0.9 0.6 -0.3 ID-1 South R-1A R-1B R-5 R-6

2,722 3.9 1.3 0.6 11.8 13.7

3.1 3.7 3.0 5.1 14.9

1.2

ID-A R-2A R-2B R-2C

636 0.9 0.4 0.6 2.7 3.7 0.4 1.1 3.1 4.6

0.9

Total 6.2 2.1 2.4 18.7 23.3 26.0 2.7

Table 5-2 Future (2035) Storage Analysis

Reservoir

Average Annual Demand

Operational (33-40% of AAD)

Fire (2 hours, dual fire)

Emergency (3x AAD)

Total Storage Required

(MG)

Total Storage

(MG)

Surplus/ (Deficit)

(MG) (gpm) (MGD) ID-1 North R-3A R-3B

970 1.4 0.5 0.6 4.2 5.3 3.1 2.8 5.9

0.6

Rockhoff R-4 77 0.1 0.0 0.6 0.3 1.0 0.6 -0.3 ID-1 South(1,4) R-1A(2) R-1B R-5 R-6 R-7(3)

3,110 4.5 1.5 0.6 13.4 15.5

0.0 3.7 3.0 5.1 3.0

14.8

-0.7

ID-A R-2A R-2B R-2C

677 1.0 0.4 0.6 2.9 3.9 0.4 1.1 3.1 4.6

0.7

Total 7.0 2.4 2.4 20.8 25.7 25.9 0.3 gpm = gallons per minute; AAD = Average Annual Demand; MG = million gallons (1) Future residential growth of 1,800 EDUs assumed to develop in ID-1 South. (2) R-1A converted to a recycled water tank in the 2035 analysis. (3) 2035 analysis assumes new 3.0 MG R-7 Reservoir. (4) Surplus 2035 storage in ID-1 North can be used to help offset the 0.7 MGD storage deficit in ID-1 South.


5-13 June 2014

Most of the future development within the District is anticipated to occur within ID-1 South. The area will require a new 3.0 MG reservoir (R-7) to meet future storage capacity needs, including providing the necessary fire storage. The District has acquired the property for the R-7 Reservoir and a preliminary site lay-out was prepared a part of the Master Plan. Based on the future modeling scenarios a desirable operating range for the R-7 Reservoir is HWL= 977 feet and LWL = 957 feet. Additional studies of the R-7 Reservoir site are recommended in conjunction with planned development in the area. ID-1 South may still have a 0.7 MG storage deficit, which can be supplemented by ID-1 North with the construction of the proposed ID-1 North and ID-1 South Interconnect or a larger R-7 Reservoir.

Rincon currently operates four pump stations, which three serve small, closed water systems within ID-1. Each pump station is required to have the pumping capacity to supply peak flows within its service zone with an additional pumping unit for standby capacity. Table 5-3 provides a comparison of the maximum day demand with pump station capacity. From this table it can be concluded that each pump station can provide the maximum day flows with standby pumping capacity.

Table 5-3 Existing Pump Station Analysis

Pump Station Pump

No.

Pump Station Rated Capacity

Pump Station Firm Capacity(1) Zone AAD

(gpm)

Max Day Demand(2) or Peak

Hour(3) (gpm)

Surplus / (Deficit) (gpm) (gpm) (MGD) (gpm) (MGD)

Rockhoff 1 2

750 750

1.08 1.08 750 1.08 67 174(2) 576

Candlelight 1 2 3

80 80 80

0.12 0.12 0.12

160 0.23 44 128(3) 45

Rancho Verde

1 2 3

4 (fire)

260 260 260

1,000

0.37 0.37 0.37 1.44

520 0.75 152 441(3) 125

Citracado 1 2 3

260 260 260

0.37 0.37 0.37

520 0.75 113 328(3) 226

gpm = gallons per minute; AAD = Average Annual Demand; MGD = million gallons per day (1) Firm Capacity assumes one pump out of service. (2) Open system zone sized for maximum day demand. (3) Closed system zone sized for peak hour demand.

5.6 Future Water System and Reliability Projects

The District’s future water system expansion over the next 5-10 years will primarily occur within the

Harmony Grove Village development and proposed development to the immediate north and

south. New storage and transmission mains will be constructed as the system expands and serves

new development.

The District would benefit from reliability projects that strengthen both the ID-1 and ID-A water

systems to access available water storage, enhance fire flow capabilities, and provide

increased redundancy.


5-14 June 2014

5.6.1 Future Water System

The following projects are recommended to meet future growth anticipated in the Harmony Grove Village area of ID-1 South, and serve as the primary “expansion” projects in the recommended District CIP. Chapter 7 presents the cost of these facilities and basis for capacity fee recovery. Figure 5-4 illustrates the proposed water system and Figure 5-5 presents the future hydraulic profile schematic.

Project Name: R-7 Reservoir (W-1) Description: New 3.0 MG steel reservoir in ID-1 South along western boundary of District. Benefit: Meets future demands and dual fire flow requirements for existing and

planned development Type: Expansion/Betterment

Project Name: R-7 Supply Line (W-2) Description: New 16-inch supply line of 2,950 feet from existing system to R-7 Reservoir Benefit: Key supply line for R-7 and transmission to meet dual fire flows in area. Type: Expansion/Betterment

Project Name: Harmony Meadows Supply Line (W-3) Description: New 16-inch supply line of 4,400 feet to future development from R-6

Reservoir Benefit: Key supply line for development and looping of existing District system. Type: Expansion/Betterment

5.6.2 Reliability Projects

Reliability projects have been an important component of the District’s CIP, especially since completion of the 2005 Water Master Plan. The District is completing three important CIP projects as noted below:

1. Citracado Bridge (ID-1 South): Replaces existing 14-inch and 16-inch, 60-year old waterlines which cross under Escondido Creek, with a new 24-inch pipeline.

2. North Broadway (ID-1 North): Extends new water line to the District’s Laurashawn area, which is currently fed by VCMWD and increase fire flow and provides back-up interconnection with VCMWD.

3. Sierrra Linda (ID-A): District has completed the design of a 16-inch redundant pipeline within ID-A to increase reliability. Project potentially could be replaced by ID-A and ID-1 South interconnect, as described in the following section.

UT

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6/6/2014 LH SD H:\Projects\Rincon MWD\100015413 WMP Update\GIS\mxd\Future_System_facilities.mxd

Proposed PotableWater SystemFigure 5-4

Rincon del DiabloWater Master Plan

June 2014

5,000

Feet

¯

Legend; Water Authority Connection

&. Flow Control Valve

3Ú Existing Pump Station

UT Existing Reservoir

XÚ Pump Station Project

UT Proposed Potable Reservoir

Harmony Grove VillageProposed Potable ProjectsExisting Potable Water

Rinco

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June

2014


5-17 June 2014

As with previous Water Master Plans, reliability of the existing water system was reviewed with District engineering and operations staff to explore improvements in overall service. The following reliability projects are recommended to provide the District increased redundancy and increased fire protection in areas of the District. Chapter 7 presents the cost of these facilities.

Project Name: FCF No. 1 and FCF No. 3 Interconnection (W-4) Description: New 24-inch pipeline (1,100 feet) with a flow control valve between supply

lines from FCF No. 1 and FCF No. 3. Benefit: Allows FCF No. 1 to serve directly to ID-1 South and improves water quality if

FCF No. 3 is off. Type: Betterment

Project Name: ID-1 North-South Interconnect (W-7) Description: New 16-inch pipeline (5,140 feet) with a flow control valve crossing SR-78

from ID-1 North to ID-1 South. Benefit: Provides redundancy along western service area, should Metcalf FCF and

adjacent pipelines be out of service. Note a relatively low priority project. Type: Betterment

Project Name: ID-1 South and ID-A Interconnect (W-8) Description: New 12-inch pipeline (7,020 feet), with control valve, crossing I-15, near Via

Rancho Parkway. Benefit: Increased redundancy for ID-A. Increases fire flow capabilities within ID-A.

Ability to more directly serve ID-A with SDCWA supply and ability to pump back from ID-A to ID-1 for redundancy. Note a relatively low priority project.

Type: Betterment

Project Name: Gamble Road Loop (W-9) Description: New 8-inch pipeline (1,580 feet) to Gamble Road. Benefit: New redundancy and increased fire protection in ID-1 South. Type: Betterment

Project Name: San Pasqual Road Loop (W-10) Description: New 8-inch pipeline (7,140 feet) in San Pasqual Road. Benefit: New redundancy, increased fire protection, and improved water quality. Type: Betterment

Project Name: Control Valves (W-5) Description: Control R-5 Reservoir and Modify Zone. Benefit: Improved water quality and service. Type: Betterment


5-18 June 2014

Project Name: Control Valves (W-6) Description: Pressure Zone Modifications Benefit: Improved water quality and service. Type: Betterment

Project Name: VID Flume Supply Expansion (W-11) Description: New 12-inch Rockhoff Pump Station suction and discharge pipeline

(2,300 feet) in Nutmeg Street, from existing flume siphon connection (under I-15) to Gary Lane.

Benefit: Improved water supply reliability and redundancy, increases existing 1 MGD supply to 3-5 MGD.

Type: Betterment

5.6.3 Replacement Project

The following replacement project is recommended. Chapter 7 presents the cost of this facility.

Project Name: Rockhoff Pump Station Replacement (W-12) Description: New water pump station and instrumentation and controls. Benefit: Replaces facility that has reached useful life with new efficient pumping units.

Station will also be expanded to feed the ID-1 North Zone from the VID flume. Type: Replacement

6-1 June 2014

6 Recycled Water System

6.1 Summary

6.1.1 Existing System

The District’s existing recycled water system reliably delivers on average more than 3,000 AF/yr of

water for non-potable uses, accounting for approximately 30 percent of the District’s total water

supply. The Sempra Energy facility, with an average annual demand of approximately 2,700

AF/yr, is by far the largest of the District’s recycled water customers. The existing recycled water

distribution system is in good condition and does not require any capital spending reservations

at this time.

The District began delivery of recycled water to customers in October 2004. Today the District administers approximately 70 recycled water meters serving homeowner associations, several commercial businesses, and the largest recycled water customer in the County: the cooling towers of the Sempra Energy plant. The Master Plan finds the existing recycled water distribution system to be in good condition, without need for CIP reservations at this time.

6.1.2 Future Opportunities

The District currently maintains over 150 irrigation meters connected to the potable water system for irrigation. Several of these meters serve large agricultural irrigation demands and others predominately serve residential and commercial landscape demands. Over 800 AF/yr of potable water is currently used for irrigation. The Master Plan explores conversion of a large portion of this use to recycled water as well as develops estimates for future recycled water use within the District.

6.1.3 System Expansion / Recycled Water

The District’s existing recycled water system (shown on Figure 6-1) is being expanded to interconnect with a small Developer-built water reclamation plant and distribution system under construction in Harmony Grove Village. Further expansion of the District’s system is possible, contingent on costs, funding availability, and supply availability. For purposes of projecting capital spending requirements, the Master Plan assumes the District’s primary means of achieving its New Local Supply goal will be through expansion of the recycled water system. Toward this end the Master Plan recommends a CIP reservation of approximately $8.2 million for recycled system expansion to fund a significant portion of the conversions of existing potable water meters to recycled water. Other funding sources, including grants or private developer funding will be necessary to further expand the recycled water system.

Some expansion of the District’s recycled water system and recycled water deliveries will occur as a result of large residential development projects being required to use recycled water as a condition of approval. The District estimates that the Harmony Grove Village project now under construction, and one or more other future land development projects in the same area will together result in increased recycled water use as shown in Table 6-1.

LA VERONA

Escondido

Sempra EnergyPower Plant

JesmondDene Park

Civic Center/Grape Day Park

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WASHINGTON

VIA RAN

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ROCK SPRING

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BARHAM

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NO

RD

AH

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CO

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LUB

CI T

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CA

DO BIRCH

HA

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KNOB HILL

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TOPA

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CALAVO

WEST CITRACADO

RD

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PALOMAR

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CEN

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VERMONT

MONTIELJU

NIPE

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GRAND

BE

AR

VA

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Leslie LaneReservoir

ReidyCreek GC

Kit CarsonPark

The VineyardAt Escondido GC

18"

24"

18"

EL NORTE PKWY

BEAR

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LAKE HODGES

OLIVENHAIN RESERVOIR

DIXON RESERVOIR

LAKE HODGES

City of Escondido Water Service Area

Rincon del Diablo MWD

Escondido Existing Pipe

Rincon Existing Pipe

Existing Reservoir

Existing Booster Pump Station

HARRF

Existing City Customer

Existing District Customer

4/1/2014 LH SD H:\Projects\Rincon MWD\100015413 WMP Update\GIS\mxd\ExistSyst_RW_F6-2.mxd Figure 6-1

Rincon del Diablo Water Master Plan

April 2014

5,300

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June 2014


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Table 6-1 Supply Summary, Including Potential Additional Recycled Water for

Normal Year Conditions, 2013-2035

(AF/yr)

Supplies 2013 2015 2020 2025 2030 2035 Increase

2013-2035 SDCWA (potable) 7,000 7,000 7,000 7,000 7,000 7,000 0 0% Recycled – Total 3,030 3,030 3,250 3,400 3,400 3,400 370 12% -- Escondido Purchases - Sempra 2,700 2,700 2,700 2,700 2,700 2,700 0 0% -- Escondido Purchases – Other(2) 330 330 330 480 480 480 150(2) 45% -- Harmony Grove Village WRF 0 0 220 220 220 220 220 -- New Local (1) – Total 0 50 280 550 790 900 900 -- -- Potential Additional Recycled(3) 0 50 280 550 680 720 720 -- -- Other New Local Supply 0 0 0 0 110 180 180 -- Total 10,030 10,080 10,530 10,950 11,190 11,300 1,270 13% (1) New Local Supply water may be recycled water, groundwater, indirect or direct potable recycled supplies, or a

combination. (2) Assumes new development reuse including Valiano, Harmony Grove Meadows, and others in ID-1 service area. (3) See Table 6-5.

As described in Chapter 4, the District will seek to offset new customer demands with new local supplies. The District estimates it will need approximately 900 AF/yr of new local supply by 2035 to fully meet this offset goal, as shown in Table 6-1. Based on market assessments and recycled water system expansion opportunities, the Master Plan estimates that in addition to the three planned new developments (220 AF/yr+150 AF/yr=370 AF/yr) additional customer retrofits and expansion of the District’s recycled water distribution system could provide up to approximately 720 AF/yr of the District’s New Local Supply goal amount. The breakdown of potential recycled water demand is as follows:

Conversion of Existing Potable Irrigation Meters Connections to Existing System = 200 AF/yr Expanded RW System = 300 AF/yr Total - 500 AF/yr

Future Recycled Water Demand (Infill Areas of District) Connections to Existing System = 100 AF/yr Expanded RW System = 120 AF/yr Total - 220 AF/yr

A detailed breakdown of the existing potable irrigation meters is included in Appendix F.

For purposes of projecting capital spending requirements, the Master Plan assumes the District’s primary means of achieving its New Local Supply goal will be through expansion of the recycled water system, and recommends a CIP reservation for this purpose. The actual development of new local supplies could vary from this assumption. The District will continue to evaluate other new local supply options, such as small groundwater supply projects, and may reassign recycled water funding to other supply options should those evaluations prove such a shift advantageous.


6-4 June 2014

6.1.4 Recycled Water Supply Agreements with the City of Escondido

The District’s ability to expand its delivery of recycled water is largely dependent on the

availability of additional recycled water supply from the City of Escondido. Although the

District’s potential future recycled water demands are included in the City of Escondido’s

Recycled Water Master Plan, the agreements under which the District purchases recycled water

from the City of Escondido do not address increased purchases above the minimum amounts

specified. The Master Plan recommends the District coordinate with the City of Escondido to

develop appropriate modifications to the agreements to address existing and future purchases

by the District in excess of the agreement minimums.

With the exception of its projected supplies from the Harmony Grove Village Water Reclamation Facility (WRF) now under construction, the District anticipates being reliant on the City of Escondido for its supply of recycled water. The agreements under which the District purchases recycled water from the City of Escondido define the District’s minimum purchase amount, but do not clearly define the District’s rights for purchases in excess of the minimum amount for uses other than the Sempra Energy plant. The Master Plan recommends that as an early step in any planning for expansion of the recycled water system, the District coordinate with the City of Escondido to refine the terms of the agreement to address the long-term interests of the parties.

6.2 Overview and Design Criteria This chapter examines the District’s existing recycled water system, and evaluates the potential for expanded recycled water use and expansion of the District’s recycled water distribution system.

Expansion of the recycled water program may provide the District an opportunity to meet a large share of its water supply goal of no net increase in imported potable water supply. As shown in Table 6-1, the District estimates it will need approximately 900 AF/yr of new local supply by 2035 to fully meet this offset goal. As detailed later in this chapter, the Master Plan estimates that additional customer retrofits and expansion of the District’s recycled water distribution system could provide up to approximately 720 AF/yr of the District’s New Local Supply goal amount.

The remainder of the chapter is organized into the following sections:

6.3: Existing Recycled Water Distribution System 6.4: Current Recycled Water Use 6.5: Recycled Water Supply 6.6: Potential Recycled Water System Expansion

6.2.1 Recycled Water Design Criteria

Chapter 2 presented the District’s planning and design criteria for potable water systems. Similarly, planning and design criteria is presented for the recycled water system, which has not been formally published. The criteria establishes design criteria for pipeline sizing and minimum pressures in the system. Recycled water irrigation is typically designed around a 10-hour nighttime watering period, except for non-irrigation uses like cooling towers.


6-5 June 2014

An additional impact of the new dual fire flow requirement on the potable water system is the potential need to supplement fire protection from the recycled water system in the ERTC area. Although the existing recycled system was not designed specifically for fire protection, the addition of a new recycled water tank could provide fire storage in the ERTC area which is in close proximity to the storage. The District has recently implemented fire protection systems off the recycled water system in the ERTC areas, where the proposed R-1A Tank Conversion would provide up to 3.1 MG of new recycled water storage. A portion of this reservoir will therefore be dedicated for fire protection.

In summary, the Master Plan recommends the District utilize the recycled design criteria listed in Table 6-2. The Master Plan developed these criteria based on review of the City of Escondido’s recycled water planning criteria, and the District’s planning and design criteria for potable water system sizing.

Table 6-2 Recycled Water Design Criteria

Parameter Criteria Hazen-Williams Coefficient, C 130 Peaking Factor, Maximum Day 2.0 Peaking Factor, Peak Hour 6.0 Maximum Velocity 10 fps Maximum headloss per thousand feet 15 feet Minimum Pressure, Peak Hour Demand 40 psi Desired Static Pressure 50-100 psi Irrigation Period 10 hours Operational Storage 2/3 MDD Contingency Storage As Needed Fire Storage 2500 gpm x 2 hours Pump Station Capacity (open system) MDD Pump Station Capacity (closed system) Peak Hour fps = feet per second; psi = pounds per square inch; MDD = maximum day demand; gpm = gallons per minute Note: A private irrigation system may require high pressures which could require owner operated and maintained booster pumps.

6.2.2 Recycled Water Storage Criteria

The need for recycled water storage is a function of the magnitude of demand, daily and seasonal variation, relationship to reclamation plant constant flows, and location within the District’s distribution system. Referring to Table 6-2, three major storage elements are considered for the District’s recycled water system:

Operational Storage: Storage necessary to meet peak irrigation demands and to allow for a more uniform flow and ease of system operation.

Contingency Storage: Storage necessary to provide system redundancy and/or storage to allow for supplemental water or make-up water from the City of Escondido system.


6-6 June 2014

Fire Storage: A maximum fire storage of 300,000 gallons is recommended for any new recycled water tank to provide the District the ability to serve one half of a maximum dual fire flow (2,500 gpm for two hour duration)

For the District, storage also must be evaluated in conjunction with City of Escondido demands and storage, as well as consideration of the constant supply provided to the Sempra Energy plant. Harmony Grove Village will also add increased operational storage needs on the system.

6.3 Existing Recycled Water Distribution System The District began delivery of recycled water to customers in October 2004, following construction of a $2.7 million recycled water distribution system made possible in part by State loans and grant funds. The District’s primary goals for development of the recycled water system were to:

Promote recycled water for irrigation and other non-consumptive needs;

Reduce dependency on imported potable water supplies; and

Help the City of Escondido reduce discharges to its land and ocean outfalls.

Today the District administers 69 recycled water meters, two recycled water pump stations, and approximately 32,000 feet (5.8 miles) of recycled water pipeline, providing recycled water for landscaping to homeowner associations and several commercial businesses, and to the cooling towers for the Sempra Energy plant, officially the Palomar Energy Center. With an average annual recycled water demand of approximately 2,700 AF/yr, the Sempra Energy facility is the largest recycled water customer in the County.

The District’s portion of the recycled water system (shown in Figure 6-1) is not contiguous, but branches off of the City’ of Escondido’s main transmission system in multiple areas.

The source of supply for the recycled water distribution system is the City of Escondido’s Hale Avenue Resource Recovery Facility (HAARF), described in the next section. The system originates at the HARRF recycled water pump station. This station pumps the recycled water from the HARRF’s 600 foot elevation through a 24-inch transmission main, along the Escondido Creek right of way toward the northeast. The system is operated based on level control in the 2.0 MG Leslie Lane Reservoir at approximately 975 feet.

A 16-inch District pipeline extends west from the City of Escondido’s 24-inch transmission main to serve the ERTC, which includes the major recycled water user in the Sempra Energy plant on

Sempra Energy Plant: the Sempra Energy Plant, known officially as the Palomar Energy Center is a natural gas powered combined-cycle plant producing 550 megawatt of power. The plant uses recycled water for its cooling towers and is the largest recycled water customer in the County.


6-7 June 2014

Citracado Parkway. An 18-inch City of Escondido line branches north on Broadway connecting to the 2 MG Leslie Lane Reservoir. A 12-inch City of Escondido pipeline continues north in Broadway connecting to a 10-inch City of Escondido pipeline that turns west in Country Club Lane and then serves customers in the District’s northern ID-1 service area.

The District operates the North Iris Booster Pump Station at the end of the recycled water system, a 630 gpm, 202 total dynamic head Grundfos triplex package pumping system with one variable frequency drive (VFD) and two constant speed pumps. The pump station serves the Escondido Hills Homeowner’s Association (HOA) at a hydraulic grade line (HGL) of approximately 1175 feet.

The City of Escondido’s backbone 24-inch transmission continues along Escondido Creek and then extends southeast in Centre City Parkway toward Kit Carson Park and Bear Valley Parkway. A City of Escondido pipeline is routed south in Bear Valley Parkway to Via Rancho Parkway, serving customers in the District’s ID-A service area. The recycled water pipelines in ID-A are owned and maintained by the District. The District operates the Beethoven Booster Pump Station in the ID-A area, a 900 gpm, 258 total dynamic head similar triplex pumping system. The station serves the Sonata HOA and boosts pressures from the City of Escondido’s reduced pressure zone of approximately 850 feet HGL to 1100 feet HGL.

Recycled water can also be stored at HARRF in a 1.0 MG forebay tank at the west end of the HARRF site and at the 2 MG Leslie Lane Reservoir. These tanks provide daily storage of recycled water to accommodate a fairly uniform production of recycled water and hydraulic control and provide operator flexibility to manage recycled water quality and turnover. Figure 6-2 on the following page illustrates the hydraulic profile of the City of Escondido and the District’s existing recycled water system.

A summary and inventory of the District’s recycled water distribution pipelines and sizes are included in Table 6-3 by Improvement District service area. The District owns and operates over 32,000 feet of recycled water distribution system.

Table 6-3 Recycled Water Pipelines

Diameter Length (feet) ID-A System

4 inch 3,059 6 inch 4,947 8 inch 2,106

Subtotal 10,112

ID-1 System 4 inch 2,369

6 inch 6,826 8 inch 3,543

12 inch 1,194 16 inch 8,082

Subtotal 22,014

Total System Pipe 32,126

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6-9 June 2014

Pump Stations

The District operates two closed system booster pump stations which provide peak hour recycled water demand to isolated higher service areas. The City of Escondido’s recycled water system relies on the Recycled Water Pump Station at HAARF to deliver maximum day demand to the entire City of Escondido and District system.

6.4 Current Recycled Water Use Current recycled water use in the District service area averages approximately 3,030 AF/yr, with the top ten users averaging 2,940 AF/yr. The Sempra Energy plant which accounts for over 90 percent, or approximately 2,700 AF/yr, of the District’s recycled water demand. A summary of the District’s top ten recycled water customers and annual usage is provided in Table 6-4. Major users by service area are described below.

Table 6-4 Top Recycled Water Customers

Customer AF/yr Sempra (Process) 2,700 JRMC (ERTC) 83 Escondido Views HOA 59 Sonata Single Family HOA 26 Forest Glen Apartments 15 Sempra (Landscape) 15 City of Escondido 12 Sonata Maintenance HOA 12 N. Broadway School 10 Escondido Hills HOA 9

Total 2,941

ID-1 South Service Area

This service area includes the ERTC, a 164-acre technology park anchored by the 550-megawatt Sempra Energy plant and the Stone Brewing Company. It is also the site of the Palomar Medical Centre West Hospital which now uses recycled water for irrigation and blends with potable water for cooling towers. New projects in the ERTC will use recycled water for fire protection in order to mitigate the capacity constraint with dual potable water system fire flows. These projects include Palomar Medical Center, Corodata, and Stone Headquarters. These sites are planned to have fire hydrants and sprinkler systems connected to the recycled water system.


6-10 June 2014

The Sempra Energy plant was connected to the recycled water system in 2006, and uses approximately 2,700 AF/yr of recycled water for its cooling tower water. The plant has its own (0.7 MG) storage facility to equalize and optimize delivery and demand for recycled water and to provide fire protection for the plant. The cooling tower demand is required year-round, except for a scheduled maintenance and shut down for a two week period usually in the spring. In any given month, the Sempra Energy plant recycled water demand represents between 60 to 90 percent of the combined demand of the City of Escondido and the District recycled water systems.

ID-1 North Service Area

This District service area supplied by the City of Escondido in the north, includes the Escondido Hills HOA, Escondido View HOA and Reidy Creek Golf Course, which are served by a District 6-inch main along Country Club Lane that connects to approximately 28 irrigation meters along Country Club Lane, Nutmeg and Village Drive. It also includes the Forest Glen/Morningside Woods developments which are served by a District 6-inch main with approximately eight irrigation meters off of El Norte Parkway.

ID-A Service Area

This recycled water service area in the southeast portion of the City of Escondido and District, includes the Sonata HOAs, which extend from Bear Valley Parkway to Beethoven Way serving approximately 21 irrigation meters along Beethoven, Huckleberry, Maze and Inspiration Lane via a District 6-inch main. The majority of this area is also served by the District’s booster pump station off the City of Escondido’s recycled system.

6.5 Recycled Water Supply

6.5.1 Purchase Agreements with the City of Escondido

The District purchases recycled water from the City of Escondido under terms established in an agreement between the parties. The original agreement is dated February 9, 1999, and is amended by a First Amendment dated October 6, 2004, and a Second Amendment dated September 13, 2005, and interpreted in accordance with various other letter agreements including that of March 7, 2003. Inclusive of the amendments and confirmations, the key terms of the agreement relative to quantities and costs of supply available to the District are as follows:

District Minimum Average Purchase Requirement: The District is obligated to purchase a minimum of 462 AF/yr of recycled water from the City of Escondido, or

ID-1 North

Recycled Water Service Areas: The exhibit shows the general service areas for ID-1 North and South, and ID-A, which all serve recycled water.


6-11 June 2014

approximately 0.4 MGD (1999 Agreement, Section 9). Deliveries to the Sempra Energy facility may be credited toward this minimum purchase amount (March 7, 2003 confirmation letter).

City of Escondido Minimum Capacity Available to Sempra Plant: The City of Escondido is obligated to make recycled water available to the District, for use at the Sempra Energy facility, at the rate of 5,000 gpm (7.20 MGD) peak, and 3,000 gpm (4.32 MGD) average annual (First Amendment, Section 3.4.2.3).

Agreement Price: The price for the District’s purchases from the City of Escondido is based on a fiscal year 2001-02 base price of $467/AF, adjusted annually on July 1 by the lesser of the Consumer Price Index (CPI) or 5 percent (1999 Agreement, Section 10).

Current Price: The current price for the 2013-14 fiscal year is $456.20/AF for Sempra Energy plant and $1,326.24 for other users. The District only charges the going City of Escondido rate for recycled water.

Apparently lacking from the agreement and the amendments is language addressing the District’s ability to expand its use of recycled water and to rely on the City of Escondido as a source of supply for such expansion. The Master Plan recommends the District coordinate with the City of Escondido to develop appropriate modifications to the agreements to address existing and future purchases by the District in excess of the agreement minimums. Other items that may warrant clarification in a revised agreement include the incorporation of the Harmony Grove Village WRF, and the potential for other similar satellite plants.

6.5.2 Hale Avenue Resource Recovery Facility

All of the District’s current supply of recycled water is purchased from the City of Escondido and is produced at the HARRF. HARRF treats all of the wastewater entering the plant to at least a secondary level of treatment, and a portion to a tertiary level for use as Title 22 recycled water.

HARRF is an 18 MGD activated sludge facility operated under Order Number R9-2010-0032 from the Regional Board, dated July 14, 2010. The average daily wastewater flow in 2011 was approximately 13 MGD and was comprised of the City of Escondido's flow of 10.1 MGD, and City of San Diego’s Rancho Bernardo flow of 2.9 MGD.

For recycled water supply, the permitted tertiary treatment capacity of the plant is 9.0 MGD. During peak day summer demands, recycled water supplies delivered by the City of Escondido have approached 7 to 8 MGD, and are expected to increase in the future as the City of Escondido looks to expand its recycled program. The City of Escondido is evaluating possible expansions in recycled water treatment capacity. Figure 6-3 provides a schematic of the plant’s treatment processes, including its tertiary (recycled water) components.

HARRF: The City of Escondido’s wastewater treatment plant supplies recycled water to both the District and the City of Escondido.


6-12 June 2014

Figure 6-3 HAARF Treatment Schematic The schematic depicts the main treatment processes at the plant. The recycled water portion of the plant begins with the Tertiary Filters and is designated by the purple flow path lines. The current tertiary capacity of the plant is 9.0 MGD.


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6.5.3 Harmony Grove Village WRF

As a condition of development, the Harmony Grove Village project within the District is required to construct a new WRF to provide all onsite wastewater treatment capacity needs. The primary source of recycled water for the Harmony Grove Village development will be the on-site WRF, located at the southeast corner of the development. The WRF will produce Title 22 water and provide a recycled water supply for on-site irrigation demands. At build-out, the WRF is estimated to produce 0.18 MGD of average daily supply of recycled water.

The WRF will be owned and operated by the County of San Diego. The WRF’s only supply of wastewater will be from the Harmony Grove Village development, and the facility is therefore highly dependent on the timing and pace of growth to generate sufficient wastewater to treat. The WRF site will also include a 50 acre-foot (16 MG) wet weather storage site to store recycled water during wet weather for approximately 90 days; a requirement for the Waste Discharge Permit. A new recycled water pump station will be constructed at the plant to boost the recycled water from the WRF into the District’s recycled water system. The wet weather storage and pump station facilities will also be owned and operated by the County of San Diego.

As part of the developer-funded project to interconnect the District’s existing recycled water distribution system with the Harmony Grove Village WRF and distribution system, and to meet required recycled water storage requirements, the District is converting its existing R-1A potable reservoir to recycled water. The conversion of the potable water tank will allow the WRF to pump directly to an operational tank for ease of hydraulic control. The converted tank, however, is hydraulically lower than the City of Escondido’s Leslie Lane Reservoir by about 17 feet, which will require a flow control facility to isolate the City of Escondido’s higher pressure from the Harmony Grove Village system. This will also facilitate adequate tank and drain cycles for the converted tank prior to the Harmony Grove Village WRF being online.

6.6 Potential Recycled Water System Expansion As described above, some expansion of the District’s recycled water system and recycled water deliveries will occur as a result of large residential development projects being required to use recycled water as a condition of approval. The District estimates the Harmony Grove Village project now under construction, and one or more other future land development projects (namely Harmony Grove Meadows and Valiano) will together result in increased recycled water use of approximately 370 AF/yr.

As described in Chapter 4, the District will seek to offset new customer demands with new local supplies. The District estimates it will need approximately 900 AF/yr of new local supply by 2035 to fully meet this offset goal. As described in this section, and as summarized in Table 6-1 and Table 6-5, the Master Plan estimates that additional customer retrofits and expansion of the District’s recycled water distribution system, beyond the new planned developments could together provide by 2035 an additional potential recycled water demand of approximately 720 AF/yr of the New Local Supply goal amount.


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Table 6-5 720 AF/yr Additional Recycled Water Demand Goal

System

Demands (AF/yr) Existing Potable

Conversion Future Infill Total Existing 200 100 300 Future Expansion 300 120 420 Total Demand 500 220 720 Note: Additional recycled water demand in addition to Harmony Grove, Valiano, and Harmony Meadows

6.6.1 Existing and Future Customers Serviceable by Existing System (300 AF/yr)

At the time of the initial construction of the District’s recycled water distribution system, many, but not all, of the potential recycled water customers within reach of the system retrofitted their existing irrigation systems and other non-potable uses and became recycled water customers. As earlier noted there are over 150 potable water irrigation meters currently providing irrigation demand within the District.

Existing Irrigation Meters and Customer Retrofits

Based on a review of the meter data (see Appendix F), the Master Plan estimates approximately 200 AF/yr of irrigation (of nearly 800 AF/yr identified) and other non-potable demands are within reasonable reach of the existing system but not yet connected to it. The potential conversion of these customers to recycled water use, through retrofits of their existing potable systems and meters, could contribute to the District’s goal for new local supply. This estimated demand is located throughout the District within both ID-1 (North and South) and ID-A and ranges from small irrigation meters to larger agricultural meters, but also includes the former Escondido Country Club demand, which may be a longer potential usage.

Recycled water purveyors employ many different approaches in encouraging potable customers to retrofit to recycled water. These include:

Rate discounts for recycled water in comparison to potable

Financing of retrofit costs using the differential between recycled and potable rates

Direct funding assistance towards retrofit costs

Mandatory conversion ordinances, either alone or in combination with one or more of the above

The Master Plan recommends the District further consider these alternatives as part of its continuing efforts to develop new local water supply options.

Future Customers/New Infill Developments

The existing recycled water system is also positioned to provide service to some new development projected to occur over the planning horizon of the Master Plan. In particular, the undeveloped commercial/industrial lots in the ERTC are likely candidates for recycled water


6-15 June 2014

use, both for irrigation and for cooling tower uses associated with large air conditioning systems. The Master Plan estimates such future uses have the potential to increase recycled water use in the District service area by approximately 100 AF/yr. This new demand is in close proximity to the existing system and would not require system expansion, and is in addition to the Harmony Grove, Valiano, and Harmony Meadows recycled water markets.

Cost Analysis

For CIP planning purposes, the Master Plan assumes all on-site costs for recycled water use would be funded by the project owners, with the only cost to the District being administrative costs and an allowance be provided for direct funding of existing meter and retrofits for those users within reasonable reach of existing recycled waterline. The Master Plan recommends the following CIP line item (included in CIP ID NLS-F in Table 7-4):

Funds of $0.50 million for the costs to the District of administering retrofits (inclusive of Title 22 reports) of these customers, and

An additional $1.50 million as an allowance for direct funding or financial assistance for customer retrofit costs.

Assuming a 30 year term of economic analysis, an interest rate of 4.5 percent, and 200 AF/yr of increased recycled water use for conversion of existing water meters, the above expenditures would result in a unit capital cost of water delivered of approximately $600/AF, exclusive of recycled water purchase costs and system operating costs. Future infill development connecting to the existing recycled system (100 AF/yr) is assumed to be responsible for all connection costs.

6.6.2 Expansion of the Recycled Distribution System (420 AF/yr)

The largest opportunity for increased recycled water use is through expansion of the existing recycled water system to serve existing agriculture customers and future development beyond the reach of the existing system. The Master Plan has reviewed projected land use and system expansion opportunities and concluded that the main opportunity for recycled system expansion is in the Country Club Drive and the ERTC area, in the southern portion of ID-1. The Master Plan estimates potential recycled water use in this area, serviceable by an expansion of the recycled distribution system, at approximately 300 AF/yr. This 300 AF/yr includes consideration of the following:

The largest potable irrigation users continue to be the avocado growers north of Harmony Grove Village which include the western boundary of the District near Hill Valley Road and the Mount Whitney area. Several of these groves are anticipated to remain, even though development activity will occur in and around this area. The major challenge with conversion to recycled water will be acceptance by the customers of the water quality. The City of Escondido is currently evaluating a similar issue for avocado orchards to the east of the City. Additional treatment of the recycled water may be required for this reuse to be successful and could be coordinated with the City. This potential demand is estimated at approximately 220 AF/yr.


6-16 June 2014

Expansion of the recycled water system north and east of the ERTC area will increase the potential to connect existing potable irrigation meters serving commercial, industrial and multi-family areas. This potential demand is estimated at approximately 60 AF/yr.

The southern portion of ID-1 is also the location of the new Citracado High School, located off Citracado Parkway and West Valley. The Master Plan has assumed a future demand for the site inclusive in the total above. However, the Master Plan recommends the District work closely with the School District during design to determine the full extent of recycled water use. New high schools have gone to synthetic turf for athletic fields and may have reduced potential recycled water demand. Approximately 20 AF/yr is assumed for the school. Citracado High School is constructed and designed for recycled water use, but the connection to the District recycled water system is still being determined.

The District has also planned a construction water filling station near Interstate 15 and Nutmeg Street that would be connected to the recycled water system and provide access to non-potable water for construction activities.

The ID-1 service area was also reviewed for future potential recycled water demand based on general plan land uses. This potential demand is estimated at approximately 120 AF/yr and could include existing and maximizing the use of recycled water in the future.

A conceptual expanded recycled water distribution system in the southern portion of ID-1 is shown in Figure 6-4. The existing recycled water system can be expanded to the west to serve large existing agricultural users north of Harmony Grove Village, the proposed Valiano development and additional irrigation users connected to the potable water system. Recycled water system extensions south of Harmony Grove Village would provide potential service to future developments such as Harmony Grove Meadows. The proposal piping system would also facilitate the connection and conversion of existing irrigation meters to recycled water. Chapter 7 includes preliminary capital cost to expand the recycled system.

Cost Analysis

For CIP planning purposes, the Master Plan recommends the District allocate two funding line items for this expansion and retrofits (included in CIP ID NLS-F in Table 7-4) as follows:

Funds of $0.25 million for the costs to the District of administering retrofits (inclusive of Title 22 reports) of these customers,

An additional $0.25 million as an allowance for direct funding or financial assistance for existing customers retrofitting to connect to the expanded distribution system, and

Funds of $6.2 million for expansion of the recycled distribution system.

Assuming a 30 year term of economic analysis, an interest rate of 4.5 percent, and 300 AF/yr of increased recycled water use, the above expenditures would result in a unit capital cost of water delivered of approximately $1,350 per acre foot, exclusive of recycled water purchase costs and system operating costs.


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The additional potential demand of 120 AF/yr was not analyzed for cost since it is based on general land uses and the extent and location is not known at this time. Therefore, no costs are included for the District in the CIP and the assumption would be funded by future development or other sources.

6.6.3 Future Recycled Water Summary

Table 6-5 summarizes the target recycled water supply of 720 AF/yr of existing and future recycled water demands through the expansion of a recycled water system and conversion of existing potable water meters, exclusive of the two the planned developments noted below.

Harmony Grove Village 220 AF/yr Valiano/Harmony Grove Village 150 AF/yr

It is anticipated that up to 500 AF/yr may be developed from existing meter conversions and about 220 AF/yr from unidentified future uses in the District. Capital costs are identified for existing potable water meters adjacent to the existing recycled water system as well as existing irrigation meters that will require expansion of the recycled water system. All future recycled water demands attributed to infill and future expansions are assumed to be funded by the customers and/or developers.

Additional information on the component projects included in the potential recycled system expansion is included in Chapter 7. Additional detail on the potential expansion, and on the assessment of potential markets for recycled water service to existing and future customers, is included in Appendix F.


6-18 June 2014


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7-1 June 2014

7 Capital Improvement Program

and Review of Capacity Fees

7.1 Summary

7.1.1 Water System Projects

Capital improvements to the District’s water distribution system will be needed for three

categories of projects: a) system expansion to serve new development projected for the

southern portion of ID-1, b) system reliability and fire service improvement projects, and c) system

replacement projects.

The Master Plan’s recommended CIP funding allocations for water system improvement projects, by category, are summarized in Table 7-1. Replacement projects were limited to pump station upgrades, as the District currently budgets an annual pipeline replacement program. The Master Plan recommends this replacement program be reviewed on an annual basis, in light of the new dual fire flow criteria (see Section 7.3), to better prioritize the pipeline replacement projects. These projects are near-term (Phase 1 within the next five years), and long-term (Phase 2 beyond five years).

Table 7-1 Summary CIP for Water System Projects

CIP Category Description Phase 1

(prior to 2018) Phase 2

(after 2018) Total

Expansion Projects required to serve new development projected for ID-1 South. $5,380,000 $1,760,000 $7,140,000 43%

Reliability / Fire-Flows(1)

Projects to enhance the reliability and fire service capability of the existing system, in both ID-1 and ID-A

$1,525,000 $6,662,000 $8,187,000 50%

Replacement Projects to replace major system components at the end of their economic service lives, includes pump station.

$1,200,000 -- $1,200,000 7%

Total $8,105,000 $8,422,000 $16,527,000 100% (1) The recommended CIP does not include specific project costs for small diameter fire flow upgrades associated with new dual

fire flow criteria. Section 7.3 presents the order of magnitude cost implications of the fire flow criteria.

7.1.2 New Local Supply Projects

As described in Chapter 4, the District will seek to offset the potable water demands of new

development through the implementation of New Local Supplies. The Master Plan estimates that

to achieve this goal, the District will need to develop approximately 900 AF/yr of new local

supply. For purposes of CIP development, the Master Plan assumes most of this supply will occur

through additional recycled water connections / retrofits and system expansion, although other

local supplies could fill the need as well.

7 Capital Improvement Program and Review of Capacity Fees

7-2 June 2014

The Master Plan’s recommended CIP funding allocations for New Local Supply are summarized in Table 7-2.

Table 7-2 Summary CIP for New Local Supply Projects

New Supply Description Phase 1

(prior to 2018) Phase 2

(after 2018) Total

Recycled Water (assumed)

Additional customer connections/retrofits, plus system expansion, approx. 720 AF/yr(1)

$4,090,000 $4,148,000 $8,238,000 71%

Other New Supply

Other new local supply projects (groundwater or other), approx. 180 AF/yr - - $3,300,000 $3,300,000 29%

Total Total new local supply of 900 AF/yr $4,090,000 $7,448,000 $11,538,000 100% (1) Of the total 720 AF/yr approximately 500 AF/yr is estimated to be directly funded by the CIP, the remaining 220

AF/yr is responsibility of future users.

Cost Allocation and Water Capacity Fee Methodology

The Master Plan recommends the District utilize the CIP presented here as the basis for reviewing

and potentially updating its capacity fees. As part of the update process, the Master Plan

reviewed two methodologies: 1) shift to a Buy-In methodology that accounts for the nearly built-

out state of the District service area, or 2) base the expansion portion of capacity fees on the

growth projected for the service area and include a new Water Supply Offset component to

fund the District’s New Local Supply initiative.

The Master Plan CIP provides the cost basis for an update of the District’s capacity fees, which was last updated as part of the 2005 Water Master Plan, although the fee has been indexed to current dollars. With the District approaching build-out of its service area, the Master Plan recommends the District consider shifting to a system “buy-in” capacity fee or with the planned implementation of the District’s New Local Supply initiative, shift to an added supply capacity fee component to an updated expansion fee to fund the new supply initiative.

The following section summarizes the recommended CIP for a) the District’s potable water distribution system, and b) its New Local Supply initiative, inclusive of recycled water distribution system expansion projects. The projects presented here are those documented in Chapters 4, 5, and 6.

The chapter is organized into the following sections:

7.2 Recommended Projects 7.3 Fire Flow Improvement Projects 7.4 Capacity Fee Review 7.5 Capacity Fee Update and Recommendations


7-3 June 2014

7.2 Recommended Projects The projects are grouped into two phases, with Phase 1 being high priority projects scheduled for the next five years, and Phase 2 being longer-term projects scheduled for implementation after 2018. For each project, the Master Plan provides an estimate of probable construction cost, including soft costs such as design, administration, legal, and construction management.

The unit cost estimates reflect full capitalization inclusive of planning, engineering design, environmental, legal, construction, construction management and contract administration. These estimates are based on representative available data at the time of this report; however, since prices of materials and labor fluctuate over time, new estimates should be obtained at or near the time of construction of proposed facilities. Unit costs were developed based in part on input from District staff, on recent construction projects in the community, comparison with local bid documents for similar projects and unit costs used by other local agencies. Many of the projects, especially pipelines, require public involvement, traffic control, utility re-locations, and paving replacement, and accordingly may have fairly high unit costs. Recycled water system costs include estimates for onsite retrofits where the District would assist on a limited basis funding of the conversion of potable to recycled water systems. Approximately 20 sites were budgeted at $25,000 per site for retrofit assistance and an additional $1 million budgeted for financial assistance to serve the high priority users adjacent to the existing system. These costs are based on similar work for other local agencies.

The Master Plan recommends the District conduct appropriate preliminary design, environmental review, and final design investigations prior to proceeding with any of the listed projects.

The projects included in the CIP are needed to meet existing water system needs based on the District’s design criteria and reliability for the water system, and to accommodate future growth and development projected for 2030. The CIP has been divided into two phases as follows:

Phase 1 – 2014-2018 (5-Year) Phase 2 – 2019-2035

7.2.1 Water System CIP Projects

The proposed water system projects recommended for the District’s CIP are shown on Figure 7-1 (located in map pocket) and listed in Table 7-3. The CIP projects are assigned a project ID that indicates the type of project: water system improvement projects are identified as W-1 through W-12, and the recycled water projects assumed as part of the District’s New Local Supply initiative are identified as NLS-A through NLS-G (listed in Table 7-4). The recommended water system CIP projects needed to satisfy the needs of the District through 2035 total approximately $16.5 million, not including major fire flow upgrades.

7.2.2 New Local Supply CIP Projects

The proposed New Local Supply projects recommended for the District’s CIP are shown on Figure 7-1 (located in map pocket) and listed in Table 7-4. The CIP projects are assigned a project ID that indicates the type of project: New Local Supply (NLS) initiative projects are


7-4 June 2014

identified as NLS-A through NLS-G. The recommended New Local Supply CIP projects total approximately $11.5 million.

Table 7-3 Water System CIP Projects

ID Zone Project Type Description/Location Quantity Base or

Unit Cost CIP Cost

Phase 1 Phase 2 Total Expansion Projects

W-1 ID-1 South Storage New 3 MG R-7 Reservoir 3.0 MG $1.40/gal $4,200,000 $4,200,000

W-2 ID-1 South Transmission New 16-inch R-7 Supply Pipeline 2,950 LF $400/LF $1,180,000 $1,180,000

W-3 ID-1 South Transmission New 16-inch Harmony Meadows Transmission 4,400 LF $400/LF $1,760,000 $1,760,000

Subtotal

$5,380,000 $1,176,0000 $7,140,000

Reliability / Fire Flow Projects(1)

W-4 ID-1 North Transmission New 24-inch SDCWA Connection No. 1 and 3 1,100 LF $600/LF $660,000 $660,000

W-5 ID-1 South Control Valve R-5 isolation valve 3 - fire flow check valve 1 LS $75,000 $75,000

W-6 ID-1 South Control Valve Pressure Zone modifications 1 LS $100,000 $100,000

W-7 ID-1 North Transmission New 16-inch ID-1 North-South Interconnect

5,140 LF $400/LF $2,056,000 $2,056,000

W-8 ID-1 South ID-A Transmission

New 12-inch ID-1 South to ID-A interconnect pipeline and control valve

7,020 LF $300/LF $2,106,000 $2,106,000

W-9 ID-1 South Transmission New 8-inch Gamble Road Loop 1,580 LF $200/LF $316,000 $316,000

W-10 ID-A Transmission New 12-inch San Pasqual Road Loop 7,140 LF $300/LF $2,142,000 $2,142,000

W-11 ID-1 North Transmission VID Flume Supply Expansion 2,300 LF $300/LF $690,000 $690,000

Subtotal

$1,525,000 $6,662,0000 $8,145,000

Replacement Projects(2)

W-12 ID-1 North Pump Station Rehabilitation

Rockhoff Pump Station Upgrade 1 LS $1,200,000 $1,200,000

Total $8,105,000 $8,422,001 $16,527,000 MG = million gallons; LF = linear feet; LS = lump sum (1) Includes only transmission fire flow upgrades, distribution system upgrades are not included in CIP and are

assumed part of an annual pipeline replacement program. (2) Assumes District will continue with its annual pipeline replacement project.


7-5 June 2014

Table 7-4 New Local Supply CIP Projects

ID Zone Project Type Description/Location Quantity Base or

Unit Cost CIP Cost

Phase 1 Phase 2 Total

Recycled Water Projects NLS-A ID-1 South Transmission New 8” RW Extension 7,760 LF $200/LF $1,552,000 $1,552,000

NLS-B ID-1 South Transmission New 8” RW Extension to Agricultural User 2,690 LF $200/LF $538,000 $538,000

NLS-C ID-1 South Transmission New 8” RW Extension to Industrial User 5,920 LF $200/LF $1,184,000 $1,184,000

NLS-D ID-1 South Transmission New 8” RW Extension to Industrial User 6,140 LF $200/LF $1,228,000 $1,228,000

NLS-E ID-1 South Transmission New 8” RW Extension to Harmony Meadows 8,680 LF $200/LF $1,736,000 $1,736,000

NLS-F Connections Miscellaneous RW Extensions/Retrofits 1 LS $2,000,000 $1,500,000

Subtotal

$4,090,000 $4,148,000 $7,738,000

Other New Local Supply

NLS-G Allowance(1)

Allowance for unspecified new local supply with yield of 180 AF/yr

1 LS $3,300,000 $3,300,000

Total $4,090,000 $7,448,000 $11,538,000 NLS = New Local Supply; RW = raw water; LF = linear feet; LS = lump sum; AF/yr = acre feet per year (1) Assumes $18,000 per AF/yr of water supply for possible local groundwater project or further expansion of

recycled water.

7.2.3 Combined Total CIP

The combined total CIP, inclusive of both the Water System and New Local Supply projects, is summarized in Table 7-5.

Table 7-5 Combined Total CIP

CIP Category Description CIP Cost

Phase 1 Phase 2 Total

Water System Water system improvements for expansion, reliability and fire flows, and replacement $8,105,000 $8,422,000 $16,527,000

New Local Supply Develop new local supply to offset potable demand increase resulting from growth $4,090,000 $7,448,000 $11,538,000

Total $12,195,000 $15,870,000 $28,065,000

7.3 Fire Flow Improvement Projects As described in Chapter 5, the requirements and planning criteria governing fire flow requirements have changed considerably. The minimum fire flow (per the new California Fire Code) for wildland/urban interface residential areas has increased from 1,500 gpm to 2,500 gpm. Furthermore the District has also adopted new system planning criteria requiring the water system to have the capability to serve two simultaneous fire flows, a requirement known as “dual fire flows.” To meet these requirements, the water system, both existing and new will need


7-6 June 2014

to be upsized. For example, the minimum pipe diameter for residential areas will increase from 6 inches to 8 inches. More pipeline system looping will likely be needed for new developments, as well.

As a result of these changes, much of the District’s existing distribution system if constructed today would not be in compliance with District fire flow standards. Along with many other water purveyors in the State in similar circumstances, the District faces the long-term decision of whether it is reasonable and practical to upgrade those areas that were compliant with the fire flow standards that existed at the time of the water system construction, but are not compliant with the newer more stringent standard. Furthermore, if the District elects to proceed with a long-term plan for system upgrades, it faces the decision of how to fund those upgrades, and whether the costs of upgrades should be borne by water users or paid from other sources.

To that end, the Master Plan recommends the District review the overall capital cost requirements for fire flow upgrades presented in Table 7-6, as well is the District’s annual pipeline replacement program to explore cost efficiencies in both upgrading older pipelines concurrent with meeting the new fire flow standard.

Should the District elect to upgrade its existing distribution system to the fire flow level of service of the new standards, Table 7-6 provides an order-of-magnitude estimate of upgrade costs.

Table 7-6 Long-Term Fire Flow Upgrade Projects

ID Zone Project Type Description Quantity Base or

Unit Cost CIP Cost

Phase 1 Phase 2

CFF-1 ID-1, ID-A Distribution Upsize existing 6" pipeline

to 8" in for 2,500 gpm FF 100,330 LF $200/LF - - $20,066,000

CFF-2 ID-1 Distribution Upsize existing pipelines within ID-1 for dual 2,500 gpm FF

25,000 LF $200/LF - - $5,000,000

Total -- $25,066,000 LF = linear feet

One immediate fire flow upgrade includes replacing approximately 100,000 feet of existing 6-inch pipe with 8-inch pipe in order to deliver the minimum single 2,500 gpm fire flow requirement (proposed CIP CFF-1) for wildland/urban interface areas. This would include the majority of 6-inch pipelines serving existing fire hydrants but would not include 6-inch main extensions with no hydrants and only water services. As noted above, this approach would allow the District to upgrade its older pipelines and concurrently improve fire protection. Over time the District would strive to meet the new fire flow standards for existing customers. Figure 7-1 includes the 6-inch waterlines in the District that would be candidates for replacement over time.

Upgrading the water system to deliver dual fire flows will require an additional investment from the District to upsize pipes and strengthen pipeline looping in order to increase system capacity to meet the equivalency of 5,000 gpm fire flow (two 2,500 gpm dual fire flows). One of the added benefits of the proposed reliability projects listed in Table 7-1 is the increased fire protection to the dual fire flow standard in the areas which they serve.


7-7 June 2014

One of the variables in evaluating dual fire flow is selecting the two hydrant locations in a pressure zone. It became apparent, that the proximity of each fire assumed would significantly impact the hydraulics and extent of the water system upgrades. It was agreed with the District that the primary goal was to provide dual fire flows within a pressure zone and not to concentrate the dual fire flows where single 8-inch pipelines would need to deliver the flow and pressure to isolated areas. Proposed CIP CFF-2 includes upgrading approximately 25,000 feet of water mains, generally up to 12-inch in diameter, to increase fire protection in the ID-1 area of the District to meet the dual fire flow standard.

In summary, the Master Plan estimates the District would need to spend approximately $25 million on fire flow upgrades to meet the new District criteria, including both wildland/urban interface and dual fire flows. Since most of the District was designed to a lower fire flow standard, it seems reasonable that fire flow upgrades may be implemented over a long period of time given the cost impacts and funding limitations. Recommendations therefore include:

Adopt a consistent policy on the spacing of dual fire flows within a service area or pressure zone.

Incorporate new fire flow criteria into planned new developments.

Evaluate annual replacement program and opportunities to incorporate fire flow upgrades.

7.4 Capacity Fee Review The District has historically charged capacity or connection fees to provide water and/or recycled water service to its new customers. The fees pay for the planning, design and construction of capacity improvements and/or new facilities required for the delivery, distribution and storage of water and/or recycled water. Under California State law, connection fees must be based on relevant capital costs. This section provides a review of potable and recycled water connection fees in the District. Section 7.5 includes recommendations to update the potable water and recycled water connection fees, and incorporate the District’s water supply goal of no net increase in imported water supplies.

7.4.1 Introduction

The District has traditionally used an “expansion method” for development of the potable water connection fee, with the last analysis developed as part of the 2005 Water Master Plan. Subsequent to adoption of these fees, the District has annually adjusted the fee based on inflation with a CPI index. A separate water connection fee was established for each service area: ID-1 and ID-A based on proposed expansion projects and estimated of future equivalent dwelling units (EDUs) anticipated to be connected at that time. In addition, the District has established recycled water capacity fees for new irrigation meters that connect to the recycled water system. This fee was established as a percentage of the water capacity fee and was designed to encourage recycled water use.


7-8 June 2014

7.4.2 Existing Potable Capacity (Connection) Fees

The water connection fee varies depending on the hydraulic capacity of the meter and the potential demand it could place on the water system. The current water connection fee for ID-1 is $5,992 (ID-A is $1,720) for a standard 5/8-inch meter connection, typical of a new single family unit (1 EDU). A summary of current ID-1 and ID-A charges is included in Table 7-7.

Table 7-7 District ID-1 and ID-A Existing Water Connection Fees

Meter Size (inch) ID-1 Fee ID-A Fee Max Flow (gpm) 5/8 $5,992 $1,720 10 1 $14,981 $4,298 25

1.5 $29,962 $8,599 50 2 $47,940 $13,755 80 3 $95,877 $27,510 Per Manufacturer 4 $149,809 $42,984 Per Manufacturer 6 $299,617 $85,967 Per Manufacturer

gpm = gallons per minute Note: Connection fees shown are District only; SDCWA connection and treatment fees also apply

The connection fees in Table 7-7 are currently charged for new connections to only the potable water system. In addition to the District potable water capacity fee, there is also a SDCWA capacity and treatment fee that is imposed on all potable water connections, but not connections to a recycled water system. Note the current fee is based on a 2012 ENR of 10,739 and would increase by 4.3 percent.

7.4.3 Existing Recycled Capacity (Connection) Fees

The recycled water connection fee was developed by the District to offer an incentive to connect to the recycled water system. As a result the recycled water capacity fee was set at 50 percent of the potable water capacity fee. The current recycled water connection fee for ID-1 is $2,996 (ID-A is $860) for a standard 5/8-inch meter connection. A summary of current ID-1 and ID-A charges is included in Table 7-8.

Table 7-8 District ID-1 and ID-A Existing Recycled Connection Fees

Meter Size (inch) ID-1 Fee ID-A Fee Max Flow (gpm) 5/8 $2,996 $860 10 1 $7,491 $2,150 25

1.5 $14,981 $4,300 50 2 $23,971 $6,878 80 3 $47,939 $13,755 Per Manufacturer 4 $74,905 $21,493 Per Manufacturer 6 $149,809 $42,984 Per Manufacturer

gpm = gallons per minute


7-9 June 2014

The connection fees in Table 7-8 are currently charged for new connections to the recycled water system. The SDCWA does not collect a capacity and treatment fee for connections to the recycled water system.

7.4.4 Review of Capacity Fee Methodologies

There are three basic methodologies typically used to calculate capacity fees:

1. Incremental or Expansion Method: Historically used by the District and fully captures that new growth funds new expansions. Requires accurate estimate of future EDUs and capacity expansion costs. Also can be used to include a supply portion to offset cost of expansion for new water supplies.

2. Buy-in Method: Typically used for nearly build-out communities to assure that new customers are on par with existing customers who have paid to construct the majority of the current water system.

3. Combined Method: Combination of the above methods. The methodology sums the value of existing and future growth related capital facilities divided by the total EDUs at build–out.

The following section evaluates expansion and buy-in methods for the District and the demand recommendations to update potential recycled water fees.

7.5 Capacity Fee Update and Recommendations This section presents recommendations for updates to the potable and recycled water fees. An initial step in updating an expansion capacity fee is to develop a realistic forecast of future connections or EDUs to the potable water system (Section 7.5.1). An overly conservative estimate of the number of EDUs can result in underestimating the capacity fees resulting in a shortfall in connection fee revenues. The water system expansion and supply offset projects identified earlier in this chapter serve as the basis for calculating a new expansion-based capacity fee. Alternatively, given the build-out nature of the District, especially within ID-A, consideration should be given to developing a uniform District-wide connection fee based on an asset valuation approach to capacity fees (Section 7.5.2). The advantages and disadvantages for each approach are discussed further in the section. Recommendations to updating the District’s fees are presented in Section 7.5.4.

7.5.1 Expansion Fee Update with Supply Offset Component

A new potable water capacity fee would include both facility expansion projects designed to support new growth as well as fund the water supply offset program projects. Because only ID-1 includes expansion projects, the ID-A expansion fee update would only include the supply offset component. Should the District not include the supply offset component, both of the fees would significantly be reduced under the new Master Plan due to the reduction in expansion projects.


7-10 June 2014

Update of Projected Water EDUs

The total number of future users and an estimate of the number of corresponding water meters must be projected to calculate capacity fees. The Master Plan estimated a total of approximately 1,600 single family units based on planned developments and potential infill developments, all within the ID-1 service area, and an additional 40 connections of non-residential parcels. Assuming one non-residential unit parcel is equivalent to 5 EDUs, an additional 200 EDUs would be added, resulting in a total estimate of 1,800 EDUs future connections within ID-1.

ID-A is predominately built-out with no major planned developments. No future EDUs have been assigned for this planning period, thus it is determined that the ID-A potable water capacity fee would be limited to only the supply offset component if the expansion methodology is maintained.

Water Expansion Fee Updates

The water meter connection costs for potable water service can be determined from the CIP costs that are attributed to expansion (see Table 7-1), and the projected number of future EDUs. Only ID-1 service area includes expansion projects to support the estimated 1,800 EDUs.

Preliminary updated calculations for the ID-1 and ID-A capacity fees are shown in Table 7-9.

Table 7-9 ID-1 and ID-A Water Connection Fee Calculations

Service Area Expansion CIP Future Meter EDUs Cost per Meter

(1 EDU = 5/8" meter) ID-1 $4,760,000(1) 1,800 $2,644 ID-A $0 $0 $0

(1) ID-1 storage and transmission projects assume two-thirds future growth and one-third betterment to upgrade fire flows (67% or $7.1 million).

Water Supply Offset Fee Component

In order to achieve the District’s new water supply goal of no net increase in imported water, a capital investment by new development in local water supply projects is essential to meeting the goal. This can be accomplished by expansion of the recycled water program and/or local groundwater projects. In order to develop an approximate supply offset fee, the recycled water system expansion program (see Chapter 6) and other local water supply projects are used to estimate the per EDU costs. From Table 7-2, a total of $11.0 million in projects for expansion of the recycled water system to capture increase demand and offset potable water increases. Table 7-10 presents a preliminary offset fee calculation for the District. This offset fee would include both ID-1 and ID-A as a District-wide supply goal.

Table 7-10 ID-1 and ID-A Water Supply Offset Fee Calculation

Service Areas Expansion CIP Future Meter EDUs Cost per Meter

(1 EDU = 5/8" meter) ID-1 and ID-A $11,538,000 1,800 $6,410


7-11 June 2014

Expansion Fee Update

The new expansion fee update would be calculated for each service area as the sum of the expansion fee and offset fee components. Table 7-11 presents the new expansion fee.

Table 7-11 Capacity Fee (Expansion) Summaries

Service Area Cost per Meter

(1 EDU = 5/8" meter) ID-1 $9,054 ID-A $6,410

7.5.2 Buy-in Method

The system buy-in method is based on the average investment in the water system by current customers. Raftelis in the Comprehensive Guide to Water and Wastewater Finance and Pricing, Second Edition (1993) describes the system buy-in methodology as follows:

"Under this approach, capital recovery charges are based upon the 'buy-in’ concept that existing users, through service charges, tax contributions, and other up-front charges, have developed a valuable public capital facility. The charge to users is designed to recognize the current value of providing the capacity necessary to serve additional users."

The American Water Works Association (AWWA) Manual M26 suggests that a system buy-in charge be calculated by taking the equity investment (net investment with or without depreciation) and dividing by the number of customers (or equivalent customers). Once new customers have paid their fee, they become equivalent to (or on par with) existing customers and share equally in the responsibility for existing and future facilities.

The system buy-in methodology has several distinct advantages:

The buy-in methodology is a common and well-accepted methodology for calculating capacity fees.

The buy-in methodology includes only the cost of existing facilities and excludes the costs of future or planned facilities; it therefore does not require a formal capital improvement program. The buy-in methodology does not necessarily depend on an assessment of existing capacity availability, and therefore does not require the more detailed analyses required to justify fees based on other methodologies.

Capacity fees based on the buy-in method are a reimbursement for past capital costs; therefore, the use of the fees is to reimburse the agency (or existing customers). Once reimbursed, a utility is able to spend capacity fee revenue as it desires. As a result, detailed accounting of capacity fee expenditures is greatly simplified.

Determining the value of the District’s assets is based on the premise that the utility is worth the sum of the individual components or assets that make up the utility. Under the historical asset approach, the original cost of the assets can be considered under standard practices with and


7-12 June 2014

without depreciation. Table 7-12 summarizes the District’s historical assets with and without depreciation based on the June 30, 2010 CAFR. It is also estimated that the District currently serves approximately 8,000 EDUs or existing connections. Assuming a historical asset approach without depreciation, the resulting buy-in fee for ID-1 and ID-A would be approximately $6,820 per EDU.

Table 7-12 Buy-In Fee Based on Estimated Historical Assets

With Depreciation Without Depreciation Capital Assets Not Being Depreciated $3,195,301 $3,195,301 Capital Assets Being Depreciated $49,377,507 $49,377,507 Construction in Progress $1,988,411 $1,988,411 Depreciation $(22,885,603) Add Past Interest Deleted Outstanding Principal Total $31,675,616 $54,561,219 Source: Rincon del Diablo CAFR June 30, 2010

7.5.3 Recycled Water Capacity Fee Options

The District’s current recycled water capacity fee is incentive-based and is set at 50 percent of the water capacity fee for the respective ID-1 and ID-A service areas. District recycled water meters are primarily for landscape irrigation and typically range in size from 1 to 2 inches. Unlike the potable water meters, the recycled water meter connection does not have to pay a SDCWA capacity fee for imported water supply, offering a substantial savings for a new irrigation user.

Since the planned expansion component for the recycled water system has been developed as part of a potable water supply offset goal, a buy-in fee approach is also considered as an option to the current recycled water fee.

Similar to the potable water buy-in fee, it was reported that the District’s recycled water depreciable assets were valued at about $5.1 million. The District currently serves about 3 MGD of recycled water which is equivalent to approximately 6,000 EDUs (assuming 1 EDU = 500 gpd). Based on these assumptions a buy in fee for the recycled water system would be approximately $850/EDU, considerably lower than the current $3,000/EDU. This result is partly skewed by the large Power Plant demand and may not be representative of the typical user that would “buy-in” to the recycled water system.

An alternative calculation was performed to remove the influence of the Power Plant for the new customer buying in to the system. In a review of the existing infrastructure it was assumed that approximately 50 percent of the capital recycled water assets were attributed to the Power Plant, including the 16-inch transmission main and HAARF Recycled Water Pump Station. Since the Power Plant is about 90 percent of the recycled water demand only about 600 EDUs would be attributed to the rest of the District’s recycled water system. Based on these assumptions a buy-in fee for the recycled water system would be approximately $4,250/EDU, resulting in about a 40 percent increase in fee.


7-13 June 2014

7.5.4 Summary Recommendations

In summary, the potable water capacity fee options include the following:

1. Decrease fee by 56 percent to $2,644: Only expansion fee for ID-1. ID-A fee = $0 as there are no expansion projects.

2. No Increase: Maintain at $6,000/EDU for ID-1 with annual ENR increases to ID-1 and ID-A (ID-A stays the same, which is a lower fee). Note the current fee is based on 2012 ENR of 10,739.

3. Moderate increase 15 percent to $6,820/EDU. Switch to buy-in method without depreciation. ID-A fee would be increased to $6,820/EDU under this approach.

4. Major increase by 50 percent to $8,776/EDU. Incorporate water supply offset fee plus the expansion fee component. ID-A fee would increase to $6,132, as there are no expansion projects.

Potable Water Fee Recommendation: Shift potable water connection fee to a buy-in fee methodology which would result in a uniform capacity fee for the entire District. The new fee would also collect 75 percent of the funding for the water supply offset goal.

The recycled water capacity fee options include the following:

1. No Increase in fee. Fee would remain at $3,000/EDU for ID-1 (a lower fee would remain for ID-A as well). Note: Irrigation meters connected to the recycled water system do not pay the $4,800 SDCWA capacity fee. Potable irrigation fee $10,800 vs. $3,000 recycled fee. Note the District does offer substantial savings to connect to recycled water system.

2. Decrease the fee to $850/EDU. Switch to buy-in approach. Assume $5.1 million in depreciable assets divided by estimated existing capacity of about 6,000 EDUs.

3. Major increase 40 percent to $4,250/EDU. Assume 50 percent system dedicated to Power Plant reducing net asset value to $2.55 million. Reduce EDUs to 10 percent of 6,000 EDUs served or 600 EDUs.

4. Maintain 50 percent of Potable Fee with New Buy-In Approach. The District could maintain policy for 50 percent reduction in fee and adjust recycled water fee to 3,410 per EDU if the new buy-in-approach was adopted.

Recycled Water Fee Recommendation: No change at this time to recycled water fee recognizing incentive the District offers to users, which will encourage conversions and retrofits in future. Also, note fee based on 1 EDU, a typical irrigation meter would be 2 inches so a 40 percent increase would be a substantial dollar amount.


7-14 June 2014


APPENDIX A

Board-adopted

Fire Flow Criteria

APPENDIX B

Level of Service Evaluation

B-1

Appendix B. Alternative Service Levels

The alternative service levels considered consist of the following three general categories:

• Basic: Meet all drinking water regulations and permit conditions, eliminate potential stranded assets and set planning criteria to the minimum acceptable industry standards (with the exception of recently established fire flow requirements by the District Board). Continue reliance on imported water supplies for all treated water demands. Implement new recycled water or other local supply projects only if all costs are covered by users or outside sources such that implementation does not lead to an increase in potable water rates.

• Enhanced: Meet all drinking water regulations and permit conditions, and upgrade the water system to meet District performance standards for reliability. Continue reliance on imported water supplies for all or most treated water demands, Evaluate new recycled water expansions or other local supply projects recognizing the benefits of such projects to water supply reliability, but still with significant weight to cost-effectiveness and water rates.

• Enhanced +: Meet all drinking water regulations and permit conditions, and upgrade the water system to meet District performance standards for reliability and fire protection for all wildland-urban interface areas. Serve as North County leader in water supply development and implement long term water supplies to reduce dependence on imported water. Assist in regional reliability projects and integration. Aggressively expand recycled water system.

A preliminary assessment of level of service criteria included collaborative, workshop-oriented process with District staff, and with Board participation. The collaborative process reviewed service components and evaluation criteria, and examined the cost and other consequences of alternative service levels. Service components evaluated included the following:

• Water Supply

• Water Storage

• Water Pressure

• Water Quality

• Distribution System Reliability

• Fire Protection

• Demand Management

• Interagency Coordination

An evaluation of the proposed level of service components is presented below. The Master Plan presents the desired service levels for water distribution, supply and service.

1. Water Supply

Basic: Continue 100% water supply from the Water Authority. Consider abandoning the southerly aqueduct connection and serving all ID-1 areas from the north to reduce operation and maintenance costs and water quality concerns.

Enhanced: Continue reliance on imported water supplies for all or most treated water demands. Evaluate new recycled water expansions or other local supply projects recognizing the benefits of such projects to water supply reliability, but still with significant weight to cost-effectiveness and water rates.

Enhanced +: Serve as North County leader in water supply development and implement offset program to maintain Water Authority Purchases at 7,000 AF/yr through increasing recycled

B-2

water demands and/or developing small groundwater supply. Note: The proposed Water Factory project, a 2 mgd groundwater recharge and recovery project in the Harmony Grove Village area, is no longer feasible based on hydrogeologic investigations.

2. Water Storage

Basic: Maintain current District policy of approximately 3 average days plus fire storage in system and rely on interagency connections for Authority shutdowns.

Enhanced: Increase in-zone storage to 10 days to reduce dependency on all interagency connections during Water Authority shutdowns.

Enhanced +: Provide long term groundwater basin storage or capacity participation in the Escondido-Vista and/or Olivenhain Water Treatment Plants to help meet Water Authority shutdown needs.

3. Water Pressure

Basic: Meet 20 psi minimum during fire flow and 40 psi during peak hour demand conditions.

Enhanced: Minimize pressure swings in water distribution system with increased transmission capacity, so customers see no more than 15 to 20 psi variance.

Enhanced +: Be able to meet all minimum pressure criteria during maximum day demands and fire flow with Water Authority supply out of service.

4. Water Quality

Basic: Meet all current State and Federal Drinking Water Standards, including maximum of 5 days of aged water.

Enhanced: Develop and conduct unidirectional flushing program on a seasonal basis to improve water quality in distribution system especially in dead-end areas.

Enhanced +: Install water treatment and/or recirculation facilities at storage tanks to improve water quality in tanks and distribution system.

5. Water Distribution Reliability

Basic: Maintain current distribution system looping; no distribution system upgrades unless required by minimum acceptable criteria as recommended by District.

Enhanced: No more than 50 homes on a dead-end water main. Implement an interconnect between ID- A and ID-1 water systems.

Enhanced +: No more than two hydrants on dead-end water main. Increase interconnections with the City of Escondido.

B-3

6. Fire Protection

Basic: Meet simultaneous fire flow requirements at 20 psi minimum pressure per new District criteria utilizing the potable water system and, if necessary, supplement fire flow from the recycled water system for all new development.

Enhanced: Provide for minimum dual 2,500 gpm simultaneous fire flows and meet wild land/urban interface requirements within entire District service area utilizing the potable water system for all new development.

Enhanced +: Expand the recycled water system, where feasible, to fire flow deficient areas of potable water system. Further increase storage in the recycled water system to provide required fire flow and duration.

7. Demand Management

Basic: Continue District water conservation programs and public awareness programs. Evaluate existing water system based on a pre-drought average annual demand condition.

Enhanced: Continue to expand public education programs to meet newly established SB x7-7 target per capita water consumption. Evaluate existing water system based on three year rolling average of annual water use.

Enhanced +: Implement odd and even day outdoor watering restrictions to further reduce per capita consumption. Implement mandatory reuse ordinance for landscape irrigation.

8. Interagency Coordination

Basic: Independently maintain all current District operations and functions.

Enhanced: Develop interagency operational agreement with the City of Escondido for meeting Water Authority 10-day imported water shut down.

Enhanced +: Develop joint operating agreement with North County water agencies, including the City of Escondido, Valley Center MWD, Rainbow MWD, and Fallbrook PUD to cost effectively share technical, management, and administration resources and provide enhanced service to those North County communities.

9. Financial Capacity Fees

Basic: Maintain current capacity fees for potable and recycled systems.

Enhanced: Update expansion fees based on new CIP expansion costs and proposed Water Supply Offset Program.

Enhanced +: Convert the District to a buy-in fee methodology and implement a supplemental water supply fee to assist in capital expansion funding.

B-4

Table B-1 Level of Service

SYSTEM CRITERIA Level of Service

COMMENTS CIP IMPACT BASIC ENHANCED ENHANCED +

WATER SUPPLY X

900 AF/yr Offset Supply to maintain Water Authority Purchases at 7,000 afy. Note: Water Factory project not feasible.

Recycled Water Improvement and/or smaller groundwater supply investigations

WATER STORAGE X Maintain 3 days. Convert Potable Tanks to Recycled and construct new R7 Tank

Minimal $$ spent on tank conversion. Use partial capacity fees for R7.

WATER PRESSURE X No recommended change N/A

WATER QUALITY X No recommended change N/A

DISTRIBUTION RELIABILITY X Improve looping in water system: ID1 North to South and ID 1 South to ID A

Major investment for parallel and looped pipelines in system

FIRE PROTECTION X

Expand RW system to ERTC area to increase fire protection. Meet 2,500 gpm fire flow with storage and transmission mains.

Major investment to increase fire flows to 2,500 gpm and meet limited dual fire flows.

WATER DEMANDS X Meet SB x7-7 2020 target demands and plan for 2035 UWMP projected demands

No major CIP impact.

INTERAGENCY COOPERATION X

Develop, amend or update interagency operational agreement with City of Escondido for securing 10-day imported water shut down.

CIP impact unknown

FINANCIAL X Update Capacity Fee with Offset portion

Potentially increases future revenues to fund offset project

APPENDIX C

Reservoir Siting Layouts

FIGURE 3-1 STORAGE SITING OPTION

APPENDIX D

District and City of

Escondido Interties

Location Canyon/BeValley (A-1Mary LaneSummit (A-BeethovenHuckelberrMary LaneBear ValleyBear ValleyLane El Norte PkNutmeg Morning ViBorden

Vista/Ash

Ash/SheridN BroadwaSimpson WAndreasenAndreasonIndustrial AAuto Park WNorth Auto Park WSouth Auto Park WHoward Brotherton Miller Ave Quiet Hills/Rancho PkGary Lane/Fuerte Ln

Country Cl

Cortez/EscCourse

EsZo

ear 1) 850

/ -2) 867

n/ ry (A-3) 850

/Foothill 850y/Alamo 850y/Cody 850kwy/ 928iew/ 928

975

dan 975ay/Vista 928Way/ n 930n Dr/ Ave 930Way 930Way 930Way S./ 930Rd/ 930

/Via kwy 850

/ Cou

ub Drive Cou

c. Golf Cou

Table

condido Systeone & Pipe Siz

Park Hill 1

A-3 1

Park Hill 1

Park Hill 1 Park Hill 1 Park Hill 1

Lindley 1

Lindley 1

Clearwell 2

Clearwell 2 Lindley 8 A-11 1

A-11 8

A-11 1

A-11 1

A-11 1

A-11 8

Park Hill 1

untry Club 8

untry Club 1

untry Club 1

D-1 Esc

em ze

ConnecValve

0"

4" 14" B-fly controlle

6" 10" PRV

2" 12" GV w/plate

4" 8" PV w/4" 8" PV w/

2" 12" GV w/plate

2" 12" GV

25" 14" plug

25" 12" 8" 8" gate v0" 10" gate

8" 8" gate v

2" 12" gate

2" 12" gate

0" 10" gate

8" 2" 6" gate v

8" 8"

2" 10"

0" 10"

D-1

condido-Rin

ctingSize

WaterMeter

Yes

flow d Yes

V Yes

No /plate No /plate No

No

No

Yes

Yesvalve Yes

valve Yes

valve No

valve No

valve No

valve No

No

valve No

Yes

Yes

Yes

ncon Interti

rr

Rincon SyZone & Pip

829 ID-A

829 ID-A

829 ID-A

829 ID-A 829 ID-A 829 ID-A

958 ID-1

958 ID-1

CWA PL#1

CWA PL#1958 ID-1 958 ID-1

958 ID-1

958 ID-1

958 ID-1

958 ID-1

958 ID-1

958 ID-1

958 ID-1

958 ID-1

958 ID-1

DRA

ies

ystempe Size Ope

8"&10" limite

16" mainuse; cont

10" eme

10" close8" close8" close

12" close

12" valvefilled

24" CWA1060emeClea

36" meteoper

24" eme18" eme

18" norm

12" norm

12" norm

12" norm

6" existhose

6" norm

8" normClubpipes

12" normClubpipes

10" normClubpipes

APPEN

AFT Septembe

erations/Comm

ed capacity n supply, contin

manually rolled by Rincorgency use on

ed ed ed

ed e off & valve ca

d w/rock A Rin 3 Conn. a0 ft. grade - rgency supply

arwell er is currently nrational rgency use onrgency use on

mally closed

mally closed

mally closed

mally closed ting connectione hi-line? mally closed mally open; Coub area, Esconds, Rincon wate

mally open; Coub area, Esconds, Rincon wate


NDIX D

r 2013

ments

nuous on ly

an

at to

not

ly ly

n? fire

untry ido

er untry ido

er untry ido

er

Location

Pinehurst/ Firestone

Pinehurst ACottonwoo

Nutmeg/ YGlen

Nordahl RdGlen

Nutmeg/SuHeights RdCanyon CrRoad CandlelighScenic Dr

A-11 Rese

EucalyptusClarence LCalle de MHoward AvMoonglow Howard AvPrivada Gl

Summit Cr

EsZo

Cou

Ave/ od Pl Cou

Yuma subd

d/ Rhea subd

unset d subd

reek 850

t Ave/ 930

rvoir 930

s Ave 930

Ln/ alibu

930

ve/ MHP 930

ve/ en 930

rest subd

condido Systeone & Pipe Siz

untry Club 8

untry Club

division 8

division 8

division 1

Park Hill 8

A-11 8

A-11 3 A-11 1 A-11 4

A-11 8

A-11 8

division 8

em ze

ConnecValve

8" 8" plug

gate valv

8" 6"

8" 6"

0" 6"

8" 2-8" gatevalves

8" 8" gate v

30" 10" plug

0" 10" plug

4" 8" gate v

8" 6" gate v

8" gate valv

8" 2-8" gatevalves

D-2

ctingSize

WaterMeter

No

ve No

Yes

Yes

Yes

e No

valve No

valve No

valve No

valve No

valve No

ve No

e No

rr

Rincon SyZone & Pip

958 ID-1

958 ID-1

958 ID-1

958 ID-1

958 ID-1

958 ID-1

subdivision

subdivision

958 ID-1

subdivision

subdivision

subdivision

829 ID-A

DRA

ystempe Size Ope

8" normClubpipes

normClubpipes

10" normEscowate

10" normEscowate

10" normEscowate

8"

8" norm547REsco

10" norm547R

10" norm547R

6" normpipes

6" normpipes

normpipes

8" normEscowate

APPEN

AFT Septembe

erations/Commmally open; Coub area, Esconds, Rincon wate


mally open; ondido pipes, Rer mally open; ondido pipes, Rer mally open; ondido pipes, Rer

mally closed; TrR Rincon pipesondido water mally closed; TrR Rincon pipesmally closed; TrR Rincon pipesmally closed; Rs, Escondido w

mally open; Rins, Escondido w

mally open; Rins, Escondido w

mally closed; ondido pipes, Rer

NDIX D

r 2013

ments untry ido

er untry ido

er

Rincon

Rincon

Rincon

ract s,

ract s ract s incon

water con

water con

water

Rincon

APPENDIX E

Data Logger Recorded

Pressure Summary

to be included with final

APPENDIX F

Recycled Water Expansion Data

Recycled Water Master PlanRecycled Water Master Plan

rincon del diablo municipal water district water master...

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