iwater assessment for polo estates wa agenda, 30, 091503

8/13/2019 IWater Assessment for Polo Estates WA Agenda, 30, 091503

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WATER SUPPLY ASSESSMENTfor the

ProposedPolo Estates Project

Prepared byCoachella Valley Water District

Post Office Box 1058Coachella CA 92236

andIndio Water uthority

1 Civic Center MallIndio CA 92201

Prepared forCity of Indio

1 Civic Center MallIndio CA 92201

May 2003


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CVWD ApprovalPrepared by:

Todd JorgensonDomestic Water Engineer

Reviewed by:

Dan FarrisDirector of Engineering

Approved by:

Steve RobbinsGeneral Manager-Chief Engineer

Accepted by CVWD Board of Directors on 2003Resolution 2003-

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Table of Contents

SECTION 1 0 INTRODUCTION1.1 escription of the Polo Estates Project

Land Use Type1.2 urpose of the Water Supply Assessment 31.3 oachella Valley Water District 41.4 oachella Valley Water Management Plan /2000 Urban Water Management Plan1.5 eliance on the UWMP and CVWMP for Documenting Water Supply and Demand1.6 ummary of UWMP Findings and this Assessment

SECTION 2 0 WATER SUPPLY SOURCES3 xisting Water Supplies 82.1.1 roundwater 102.1.2 urface Water 142.1.3 oachella Canal Water Colorado River Water) 4

2 1 4 ecycled Water I Fish Farm Effluent 152.1.5 tate Water Project Exchange Water 152 2 rojected Water Supplies 162.2.1 roundwater 172 2 2 urface Water 82.2.3 oachella Canal Water Colorado River Water). 182 2 4 ecycled Water 92.2.5 tate Water Project SWP ) Exchange Water 0

2.3 VWD Conservation Efforts Demand Management Measures) 0SECTION 3 0 PROJECTED WATER DEMAND ANALYSIS 2

3.1 rojected Water Demands 23.2 ormal and Dry Year Demand and Supply 4

SECTION 4 0 CONCLUSIONS 7

SECTION 5 0 LIST OF ACRONYMS USED IN THIS WSA 8

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SECTION 1.0 INTRODUCTIONThe Coachella Valley Water District (CVWD) and the Indio Water Authority (Authority) have preparedthis Water Supply Assessment (WSA) for the Polo Estates Project (Project) proposed in the City of Indio.This WSA has been drafted pursuant to the requirements of Senate Bill 610 (SB 610) and Senate Bill 221(SB 221), legislation enacted in 2001 and effective as of January 1, 2002, that requires cities and countiesto request specific information on water supplies from the operators of any Public Water System (PWS)that would serve new development as defined in SB 610 and SB 221 and to include this information intoenvironmental review documents prepared pursuant to the California Environmental Quality ActCEQA) t '

A written agreements (Agreement) between the City of Indio, CVWD and the Authority, dated January 3,2003, describes the respective domestic water service areas for CVWD and the Authority. According theAgreement, the. Polo Estates Project site lies within the service areas of both CVWD and the Authority.

A WSA is required for any residential project subject to CEQA3 if the project would result in thedevelopment of more than 500 dwelling units.4 The Polo Estates Project meets this definition. The Cityhas requested a Joint WSA from CVWD and the Authority because the project meets the definition ofproject under Water Code Section 10912, and therefore requires a WSA and also because both CVWD

and the Authority are public water systems as defined in said section, and are therefore required toprovide the WSA. This WSA is prepared in response to the City's request.

The groundwater basin underlying the project area, which would be used to supply water to the PoloEstates Project is currently overdrafted. CVWD has adopted The Coachella Valley Water ManagementPlan (CVWMP) to eliminate this overdraft; this CVWMP is described below. Implementation of the Planwill enable CVWD to provide an adequate supply of water for its portion of the proposed project site aswell as for other present and anticipated needs over the next 20 years and beyond.

1 B 610 amended Section 21151.9 of the Public Resources Code, and amended Sections 10631, 10656, 10910, 10911,10912, and 10915 of, repealed Section 10913 of, and added and amended Section 10657 of, the California Water Code.References to SB 610 and specific Water Code and Public Resource Code sections are made herein. SB 221 amendsSection 11010 of the Business and Professions Code, adds Sections 66455.3 and 66473.7 to and amends Section 65867.5 ofthe Government Code.

2 public water system has 3,000 or more service connections and provides piped water to the public for humanconsumption.

3 ublic Resources Code Section 21080.4 ater Code Section 10912(a)(1).

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As part of the overdraft elimination effort, CVWD imports water supply into the Coachella Valley torecharge the groundwater basin. CVWD holds contract entitlements to State Water Project water, whichit exchanges for Colorado River water delivered by the Metropolitan Water District of SouthernCalifornia (MWD); MWD delivers the water from its Colorado River Aqueduct through a turnout at theWhitewater River; the water flows down the riverbed to a series of recharge basins near Windy Point,where it is percolated into the Upper Coachella Valley Groundwater Basin. The Exchange Agreementwith MWD enables CVWD to purchase additional State Water Project entitlement as well as periodicwater supplies on the spot market for recharge into the Upper Valley Groundwater Basin.

CVWD also has rights to Colorado River Water, which is brought into the valley through the CoachellaBranch of the All-American Canal and is accessible to much of the Lower Valley. Where possible, theCanal Water is used in lieu of groundwater to reduce pressure on the groundwater basin. In addition,CVWD is reviewing and testing locations to determine where the canal water can be placed to rechargethe groundwater basin in the Lower Valley.

The Authority, by itself, does not have the ability to import water to provide domestic water service to theproject or to recharge the aquifer. The Authority's ability to meet the projected water demands of theproject site under the conditions listed in Water Code Section 10910 is contingent upon CVWD's abilityto meet those same demands for the entire Project as well as for all other existing and projected uses inCVWD's service area over the next 20 years. CVWD, in effect, is a regional supplier as well as a localpublic water system. For that reason, this WSA is undertaken from the prospective of the water

supplies available to CVWD.

1.1 Description of the Polo Estates Project

The Polo Estates Project is a development plan proposal for the development of a residential communityon an approximately 234 acre site in the City of Indio. The project will include 1,340 single-familyhousing units along with recreational, open space and commercial amenities. Table 1.0-1 summarizes theproposed land uses and their respective size in terms of acreage, units or square feet.

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Table 1.0 1Polo Estates Project Land Use Summary

Land Use Type Acreage Units Square FeetResidential 214.4 1,340Commercial/Mixed Use 20.0 261,000Totals: 234.4 1,340 261,000

A portion of the project site currently is used as a sod farm, to which CVWD supplies irrigation water.This use is anticipated to phased out gradually as development gradually is phased in on the project site.Thus, the proposed uses ultimately would replace existing open space and agricultural uses. Project waterdemands would be partially offset by the existing demand for irrigation water. In the Coachella Valley,average water consumption for agricultural uses is similar to that of residential uses.

The project site is located on the northwest corner of Jackson Street and Avenue 52. The project issurrounded by residential uses, open space, the City of Coachella on the east side of Jackson Street, andthe County of Riverside community of Vista Santa Rosa the south across Avenue 52.

Construction of the Polo Estates Project may occur in up to ten phases. The first phase of construction isanticipated to begin in 2005. Construction of the project would occur intermittently through build out ofthe project in 2020.

The timing of the project places it within CVWD's timeframe for calculating planned future uses.CVWD planning documents include water demand and supply projections through 2035. Refer toSection 3.1, Projected Water Demands, for a discussion of the estimated water service demands of thePolo Estates Project.

1 2 Purpose of the Water Supply Assessment

The primary purpose of this WSA is to provide an analysis of whether the CVWD water system hassufficient projected water supplies to meet the projected demands of the Polo Estates Project. Specifically,this WSA determines whether the CVWD water system's total projected water supplies available duringnormal, single dry and multiple dry water years during a 20-year planning period will meet the projectedwater demand associated with the proposed project, in addition to the CVWD water system's existing and



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planned future uses, including agricultural and manufacturing uses. If the water supply is anticipated tobe insufficient, the WSA must describe measures being taken to obtain an adequate supply.

Additionally, SB 610 establishes a relationship between the water supply assessment prepared for .aproject and a project s CEQA documentation. Pursuant to Water Code Section 10911(b), there is now arequirement that the lead agency involved in the CEQA process include in the environmentaldocumentation the water supply assessment and, if the water supply assessment found that currentsupplies were insufficient, any of the plans necessary to meet the project s water demands. Theinformation contained in this WSA will be incorporated into any CEQA documentation prepared by theCity of Indio for the Polo Estates Project.

Furthermore, SB 221 establishes a relationship between the water supply assessment prepared for aproject and the project s approval under the Subdivision Map Act. Pursuant to California GovernmentCode Section 66473.7, the Public Water System must provide written verification of sufficient watersupply prior to the City of Indio s approval of the Polo Estates Project. This Water Supply Assessmentalso provides the information required by SB 221 to produce written verification of sufficient watersupply for the Polo Estates Project.

1.3 Coachella Valley Water District

CVWD was formed in 1918 to protect the Coachella Valley s groundwater and to seek sources ofimported water to supplement the Valley s water supplies. CVWD s service area encompasses roughly637,000 acres (or 995 square miles), mostly within Riverside County, but also extending into northernImperial and San Diego Counties. CVWD s efforts have resulted in the delivery of Colorado River waterthrough the Coachella Branch of the All-American Canal. CVWD was also instrumental in obtaining theValley s allotment of State Water Project (SWP) water. This water is delivered through an exchangeagreement with the Metropolitan Water District of Southern California (MWD). This imported waterrecharges the Valley s groundwater supply, and supports the Valley s economy,

Of the Colorado River water reaching the Coachella Valley, 98.5 percent (or about 300,000 acre-feet peryear) is supplied and delivered to farmers. The irrigation water delivery system for this water includes anetwork of about 500 miles of pipeline. CVWD provides domestic water supply for nearly 192,000Coachella Valley residents via a distribution system that includes 63 reservoirs, over 1,600 miles ofpipeline, and 92 domestic wells.



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Other water-related services provided by CVWD include irrigation water and domestic waterconservation efforts, wastewater reclamation and recycling, stormwater protection, agricultural drainage,water education, and groundwater recharge.

1.4 Coachella Valley Water Management Plan / 2000 Urban Water Management Plan

To meet its responsibilities for ensuring that there are adequate water supplies in the future and to addressvalley-wide groundwater basin overdraft, CVWD initiated a planning process in the early 1990s. Theprocess initially addressed the Lower Valley, but was expanded to include the entire Coachella Valley in1995. The Coachella Valley Water Management Plan CVWMP) is the product of that process. Thedraft copy of the CVWMP was published and circulated for public review in November 2000. Theassociated environmental documents and public review period extended beyond the December 31, 2000deadline for submittal of an Urban Water Management Plan, as required under California Water Code,Division 6, Part 2.6. Thus, the CVWD prepared an interim plan, the 2 Urban Water ManagementPlan UWMP), which relied largely on information in the draft CVWMP. Water demand and supply datain the UWMP apply to the Coachella Valley as a whole, but the demand management measures DMM)apply only to the CVWD service area. The UWMP was adopted by the CVWD Board on February 13,2001 and submitted to the California Department of Water Resources DWR) on February 16, 2001. TheFinal CVWMP was adopted on October 8, 2002. These planning documents provide the basis fordetermining whether there is a sufficient water supply to serve the Polo Estates Project.

The primary difference between the UWMP and the Final CVWMP is that the UWMP provided watersupply and demand projections based on the No Project Alternative evaluated in the CVWMP. The NoProject Alternative includes continuation of current water management actions by the CVWD. ThePreferred Alternative Alternative 4) in the Final CVWMP incorporates measures that would reducedemand below No Project conditions by implementing elements within three basic water managementcategories: conservation, groundwater recharge, and source substitution. The measures identified as partof the Preferred Alternative would eliminate groundwater overdraft. The water demand and supplyfigures provided herein reflect the conditions under the Preferred Alternative analyzed in the FinalCVWMP.

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1.5 Reliance on the UWMP and CVWMP for Documenting Water Supply and Demand

SB 610 requires that a WSA document the water demand for existing uses, planned future uses and theproposed development. Water Code Section 10910(c)(2) states that if the proposed project was accountedfor in the most recently adopted urban water management plan, the water supplier may incorporate therequested information from the urban water management plan in preparing the WSA. CVWD waterdemand projections contained in the UWMP and CVWMP take into account the use and intensity of useproposed under the Polo Estates Project as described below.

CVWD water demand projections are based on a combination of assumptions regarding the effectivenessof CVWD s water conservation programs, and municipal, agricultural, golf course, and fish faith andduck club growth (CVWMP, pp.4-1 4-5). Municipal growth assumptions refer specifically topopulation, housing and employment projections. The Southern California Association of Governments(SCAG) and the Coachella Valley Association of Governments (CVAG) provide the municipal growthassumptions used in District water demand forecasting.

SCAG/CVAG projections are based on development envisioned in planning documents prepared by localjurisdictions. For example, the City of Indio s General Plan (adopted in 1993) provides SCAG/CVAG anunderstanding of existing and proposed development within the City and the associated population,housing, and employment levels into the future. SCAG/CVAG use these projections to develop theregionwide projections that it later supplies to agencies, such as the CVWD, for regional planningpurposes. Growth and water demands contained in the City of Indio s General Plan were thereforecontemplated in the CVWMP and the UWMP.

Because development and growth assumptions under the proposed Polo Estates Project were guided byand are consistent with the City s General Plan, the demands for water under the proposed project areaccounted for in the CVWMP and UWMP. That is, the density and water demands of the proposedproject were contemplated in all CVWD planning documents.

SCAG/CVAG population, housing, and employment projections are updated regularly. The UWMP andwater demand projections prepared by the CVWD are required to be updated every 5 years. CVWD sfuture water demand projections will continue to incorporate the most recent SCAG/CVAG projections.



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This WSA incorporates the data and findings included in the UWMP and CVWMP in its determination ofwhether there is sufficient water supply to serve the Polo Estates Project, because the Project's waterdemand is factored into the CVWD's projections as a planned future use.

1.6 Summary of UWMP Findings and this Assessment

Based on the information and findings documented in this WSA, there is substantial evidence to support adetermination that there will be sufficient water supplies to meet the demands of the Polo Estates Project,in addition to existing and planned future uses, including agricultural and manufacturing uses. This isbased on the fact that CVWD has existing water entitlements, rights and contracts to meet future demandas needed over time, and has committed sufficient capital resources and planned investments in variouswater programs and facilities to serve all of its existing and planned customers. No shortages areanticipated within the CVWD's service area in average/normal year, single dry year and multiple dry yearscenarios through 2035.

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SECTION 2.0 WATER SUPPLY SOURCESThe first substantive requirement of a SB 610 WSA is the identification and description of the existingwater supply sources in the public water system that will serve the project. Water Code Section 10910(d)requires a WSA to include an identification of any existing water supply entitlements, water rights, orwater service contracts relevant to the identified water supply for the proposed project, and a descriptionof the quantities of water received in prior years by the public water system.

2.1 Existing Water Supplies

For planning purposes, the CVWD divides the Coachella Valley into two areas: the Upper Valley andLower Valley. The Upper Valley includes the cities of Palm Springs, Cathedral City, Rancho Mirage,Palm Desert, Indian Wells, and Desert Hot Springs, and the unincorporated communities of ThousandPalms, Garnet, North Palm Springs, and Whitewater. These communities include major resortdestinations, major residential developments, and approximately 80 golf courses. The Lower Valleyincludes the cities of La Quinta, Indio, and Coachella, and the unincorporated communities of Thermal,Bermuda Dunes, and Mecca. Fanning activities are large in the Lower Valley; in 1999, there were about72,800 irrigated acres of farmland. The Lower Valley also has fish farms and greenhouses that thrive onthe warm groundwater in geothermal areas. Urban development in the Lower Valley is increasing andgolf course development has expanded rapidly.

In 1999, the most recent year for which detailed water demand and supply information was developed,water supplies in the Coachella Valley were about 668,900 acre-feet per year. Water in the Upper Valleyis supplied by several sources including groundwater, surface water, Canal Water, and recycled water.The term Canal Water means Colorado River water supplied via the Coachella Branch of the All-American Canal. Lower Valley sources consist primarily of Canal Water and groundwater with a verysmall amount of recycled fish farm effluent used for agricultural purposes. The service area for canalwater delivery under the CVWD's contract with the U.S. Bureau of Reclamation is defined asImprovement District No. 1 (ID-1).

Table 2.1-1 shows the CVWD's existing water supply entitlements, rights and service contracts. Each ofthese water supply sources is discussed below. Table 2.1-2 shows historical use in the Coachella Valleyfrom these supply sources in 1936 and 1999. Figure 2.1-1 illustrates historical water supply in interimyears by source category. In 1999, roughly 56 percent of the demand was supplied by groundwater, 41

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Acre-Feet/Year ntitl Anent ight ontract ther

Unspecified` esSupplyGroundwater

Ever Utilized?

percent with Canal Water, and about 3 percent by combined surface water, recycled water, and fish farmeffluent water supply sources.

Table 2.1-1Existing CVWD Water Supply Entitlements, Water Rights, and Water Service Contracts

Canal Water 30,0002 esRecycled Water/Fish Farm ,6001 esEffluentSWP Exchange Water 3,100 es1 The CVWD shares a common groundwater source that has not been adjudicated.2 The CVWD has an undefined share of 3.85 million acre-feet of water allocated to California agricultural agencies under Priority 3a. Long termaverage use is approxim ately 330 000 acre-feet/year.3 Reflects 1999 recycled water supply volume (8,100 acre-feet per year) from the CVWD s three wastewater treatment plants capable of providingreclaimed water for use, and 1,500 acre-feet per year from fish farms in the Lower Valley.4 Imported SWP Exchange Water is not used as a direct water supply source, but rather is used to recharge groundwater supplies in the Coachella

Valley.

Table 2.1-2Summary of Historical Water Supplies acre-feet per year)

1936 1999Upper Valley lower Valley

Total Upper Valley Lower V alle; TotalCanal Water 1,400 274,900 276,300Groundwater 15,500 76,800 92,300 207,800 168,300 376,100Surface Water 4,000 4,000 6,900 6,900Recycled Water 8,100 8,100Fish Farm E ffluent 1,500 1,500Total Supply: 19,500 76,800 96,300 224,200 444,700 668,900a Reflects Colorado River water conveyed to the area via the Coachella Branch of the All-American Canal.SOURCE : CVW D Coachella Valley Water Management Plan November 2000 p. 37.



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N . .Ik 6\Np15/51 1955 1951 1968 1 1 15176 19S1 196 1971 1 W ;

1

01 1941

Figurer 2,1-1Historical Supply Summary by Type

F ka inghtr MC C p

2 1 1 Groundwater

Water Code Section 10910 f) requires a WSA to include specific information related to describinggroundwater resources if the water supply for a proposed project includes groundwater. Specificadditional information includes the following Water Code Sections 10910 f) 1) through 5)):

A review of any information contained in the urban water management plan relevant to theidentified water supply for the proposed project.

A description of any groundwater basin or basins from which the proposed project will besupplied. For basins that have not been adjudicated, information as to whether DWR hasidentified the basin or basins as overdrafted or has projected that the basin will becomeoverdrafted if present management conditions continue, in the most current bulletin of theDWR that characterizes the condition of the groundwater basin, and a detailed descriptionby the public water system.A detailed description and analysis of the amount and location of groundwater pumped bythe public water system for the past five years from any groundwater basin from which theproposed project will be supplied. The description and analysis shall be based oninformation that is reasonably available, including, but not limited to, historic use records.

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A detailed description and analysis of the amount and location of groundwater that isprojected to be pumped by the public water system from any basin from which theproposed project will be supplied. The description and analysis shall be based oninformation that is reasonably available, including, but not limited to, historic use records.

An analysis of the sufficiency of the groundwater from the basin or basins from which theproposed project will be supplied to meet the projected water demand associated with theproposed project. A WSA shall not be required to include the information required by thisparagraph if the public water system determines, as part of its review of its urban watermanagement plan, that the sufficiency of groundwater necessary to meet the initial andprojected water demand associated with the project was addressed in the description andanalysis required by Water Code Section 10631 related to the contents of the urban watermanagement plan.

Since the early part of this century, the Coachella Valley has been dependent on groundwater as a sourceof water supply. Groundwater is used to supply water for crop irrigation, fish farms and duck clubs, golfcourses, greenhouses, industrial use, and municipalities in the Valley.

The CVWD shares a common groundwater source with the Desert Water Agency (DWA), the City ofCoachella, the Authority, and the Myoma Dunes Mutual Water Company. Groundwater in the CoachellaValley s groundwater basin has not been adjudicated.

The Coachella Valley s groundwater basin can be described as a giant tilted bathtub full of sand, with thehigh end at the northwest edge of the valley near Whitewater and the low end at the Salton Sea. Waterplaced on the ground surface in the Upper Valley will percolate through the sand directly into thegroundwater aquifer. In the Lower Valley, several impervious clay layers lie between the ground surfaceand the main groundwater aquifer. Water applied to the surface in the Lower Valley does not easily reachthe lower groundwater aquifers due to these impervious clay layers.

Groundwater is pumped from two underground aquifers (the Upper Aquifer in the Upper Valley and theLower Aquifer in the Lower Valley) that are estimated to store roughly 30 million acre-feet of water,much of which originates from runoff from adjacent mountains. Table 2.1-2 shows historicalgroundwater use in 1936 and 1999, and Figure 2.1-1 illustrates interim years. By 1999, groundwater usein the Coachella Valley had increased by more than four times the use in 1936. Groundwater suppliedabout 56 percent of the total 1999 demand (93 percent in the Upper Valley and 38 percent in the LowerValley). In 1936, groundwater supplied nearly 96 percent of the total demand. Total groundwater use in1996 was about 350,000 acre-feet per year. Groundwater use has increased steadily to 1999 use levels ofapproximately 375,000 acre-feet per year (see Table 2.1-2).



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Several users (CVWD, the Authority, the City of Coachella and fau ers) pump groundwater from theLower Aquifer, which would also serve the Polo Estates Project. While CVWD continuously monitors itsown groundwater pumping, it only measures total aquifer pumping in select years. The CVWD' s annualgroundwater pumping from the Upper Aquifer in each of the past five years includes the following:

Year Acre-feet/year1997 21,3001998 23,2001999 23,7002000 24,1002001 26,000

The annual demand for groundwater in the Coachella Valley as a whole has annually exceeded the limitednatural recharge of the groundwater basin. The condition of a groundwater basin in which the demandsexceed the supplies to the groundwater basin is called overdraft . In DWR Bulletin 160-93,groundwater overdraft is described as follows (CVWMP pp.7 and 8):

Where the groundwater extraction is in excess of inflow to the groundwater basin over aperiod of time, the difference provides an estimate of overdraft. Such a period of timemust be long enough to produce a record that, when averaged, approximates the long-term average hydrologic conditions for the basin.

DWR Bulletin 118-80 defines overdraft as the condition of a groundwater basin where the amount ofwater extracted exceeds the amount of groundwater recharging the basin over a period of time. It alsodefines critical condition of overdraft as water management practices that would probably result insignificant adverse overdraft-related environmental, social, or economic effects.

Groundwater inflows and outflows for the Coachella Valley are estimated using modeling techniques.Changes in groundwater storage are determined by comparing these estimates. Change in groundwaterstorage is evaluated in terms of the change in total storage and the change in freshwater storage.

The change in freshwater storage is a critical concern. Water applied in reasonably efficient agriculturalor landscaping operations results in return flows with elevated salinity. The addition of poor-qualityreturn flows to the basin has the effect of occupying available storage to the exclusion of higher-qualitynatural inflows or artificial recharge. As a result, the net amount of freshwater storage in the groundwaterbasin decreases. Freshwater storage in the Coachella Valley groundwater basin is an ongoing issue.

DWR Bulletin 108, adopted in 1964, is the most current bulletin published by the DWR that characterizesthe condition of the Coachella Valley groundwater basin. In Bulletin 108, DWR identifies that the



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amount of usable supply in the overdrafted Coachella Valley groundwater basin is decreasing (CVWMP,p. 6-2).

This overdraft condition or mining of groundwater in the Valley has caused groundwater levels todecrease more than 60 feet in portions of the Lower Valley and raised concerns about water qualitydegradation and land subsidence. Groundwater levels in the Upper Valley have also decreasedsubstantially, except in areas where artificial recharge has successfully raised water levels (i.e., at theWhitewater Spreading Facility). The CVWMP defines actions the CVWD will take to prevent continuingdecline of groundwater levels and degradation of groundwater quality.

To address groundwater concerns, the CVWD focuses its efforts on obtaining imported Colorado Riverwater. The Coachella Branch of the All-American Canal was completed with the first deliveries ofimported Colorado River water to area growers in 1949. The impact of imported water on the CoachellaValley was almost immediate. By the early 1960s, water levels in the Lower Valley had returned to theirhistorical highs.

Although groundwater levels in the Lower Valley had stabilized, water levels in the Upper Valleycontinued to decline. In 1963, the CVWD and DWA entered into contracts with the State of Californiafor entitlements to SWP water. To avoid the estimated cost of constructing an aqueduct to bring SWPwater directly to the Coachella Valley, the CVWD and the DWA entered into an agreement with theMWD to exchange Colorado River water for SWP water. Starting in 1973, the CVWD and DWA beganexchanging their combined annual SWP entitlement of 61,200 acre-feet with MWD to recharge UpperValley groundwater supplies at the Whitewater Spreading Facility, where recharge was known to beeffective. As of 1999, more than 1.7 million acre-feet of Colorado River water, received in exchange forSWP, had been percolated into the Coachella Valley aquifer. Copies of the CVWD's SWP entitlementwith the State and the Exchange Agreement with MWD are available for review at the CVWDadministrative offices.

In 1984, CVWD and DWA entered into an advanced delivery agreement with MWD to percolateadditional Colorado River supplies in the Upper Basin during periods of surplus water availability (i.e.,wet years) in the Colorado River Basin. MWD has stored a substantial amount of water in the

groundwater basin as a result of these pre-deliveries. This stored water is key to a reliable long-termwater supply in the Coachella Valley. MWD will use the banked supplies during periods of future watershortage in Southern California. The recharge program has helped to balance the inflow and outflow ofgroundwater from the Upper Coachella Basin. A copy of the CVWD's Advanced Delivery Agreement

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with MWD is available for review at the CVWD administrative offices. A discussion of future SWPwater supplies is given below.

In 1996, CVWD and DWA recognized the need for additional imported water in order to eliminategroundwater overdraft. Since that time, the two districts purchased additional SWP water for recharge inthe Upper Valley, but these additional supplies are not expected to be available in the future and cannotbe relied upon to provide a reliable long-term source of water to the Coachella Valley.

Water levels in the Lower Valley remained relatively stable until the 1980s when they once again beganto decline. Groundwater demand had once again exceeded supply, resulting in groundwater leveldecreases of 60 feet or more in some parts of the Lower Valley. Because groundwater recharge in theLower Valley is complicated by the existence of relatively impervious clay layers in the Valley floor,CVWD began looking for sites sufficiently far away from the main clay layer to allow groundwaterrecharge. In 1995, CVWD began operating the Dike No. 4 pilot recharge facility (located on the west sideof the Lower Valley), which has successfully demonstrated that Lower Valley groundwater recharge ispossible. The facility was expanded in 1998 in order to deteimine the ultimate recharge capacity of afacility at this location. Assuming favorable results, it may be possible to recharge as much as 30,000 to60,000 acre-feet per year at this location. The CVWMP contemplates the implementation of this rechargeprogram as well as the in-lieu replacement program under which incentives will be provided to encouragepresent groundwater pumpers to use canal water in place of groundwater.

2.1.2 Surface WaterSurface water supplies in the Upper Valley come from several local rivers and streams, including theWhitewater River, Snow Creek, Falls Creek, and Chino Creek. Table 2.1-2 shows historical surfacewater use in 1936 and 1999. In 1999, surface water supplied approximately three percent of the watersupply to the Upper Valley to meet municipal demand. Because surface water supply is affected byvariations in annual precipitation, the annual supply is highly variable. Since 1936, the estimatedhistorical surface water supply has ranged from roughly 4,000 to 9,000 acre-feet per year.

2.1.3 Coachella Canal Water Colorado River Water)The Coachella Canal is a branch of the All-American Canal that brings the Colorado River water into theImperial and Coachella Valleys. The service area for canal water delivery under the CVWD s contractwith the U.S. Bureau of Reclamation is defined as Improvement District No. 1 (ID-1). CVWD has an



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undefined share of the 3.85 million acre-feet allocated to the California agricultural agencies underPriority 3a. This source of water is considered reliable although subject to cutbacks. Water from theCoachella Canal provides a significant water supply source for the Lower Valley. In 1999, CoachellaCanal Water accounted for over 60 percent of the water supply to the Lower Valley, but less than onepercent of the water supply to the Upper Valley (see Table 2.1-2). Most of this use is for crop irrigationin the Lower Valley. A copy of the contract with the U.S. Bureau of Reclamation is available for reviewat the CVWD administrative offices.

In October 1999, CVWD, ID-1, and MWD reached agreement on the key terms that will be necessaryelements in a formal Quantification Settlement Agreement (QSA) regarding a division and quantificationof their respective shares of Colorado River water. The detailed QSA document is being prepared forreview and, pending completion of all required environmental reviews, formal approval by the threeagencies' Boards. The intent of this agreement is to quantify the rights of each agency and allow thetransfer of water between willing buyers and sellers. Details of the QSA are discussed under projectedsupply below.

2 1 4 Recycled Water / Fish Farm Effluent

Wastewater that has been highly treated and disinfected can be reused for landscape irrigation and otherpurposes. It is not suitable for use as potable water. Recycled municipal wastewater has historically beenused for irrigation of golf courses and other municipal landscaping in the Upper Valley area. Table 2.1-2shows that 8,100 acre-feet of reclaimed wastewater were used in the Upper Valley in 1999. Recycledwater was not used prior to 1965. In the late 1980s the use of recycled water increased dramatically.CVWD owns and operates a total of seven wastewater treatment plants of which three generate reclaimedwater for use for golf courses, large landscaped areas and groundwater recharge. In 1999, 1,500 acre-feetof fish farm effluent were reclaimed in the Lower Valley for use in agricultural irrigation, duck clubs, andfish farms. Recycled water will not be available to the Polo Estates Project or other projects in thevicinity in the foreseeable future. However, in the event that recycled water becomes available, majorwater consumers such as golf courses may be required to use it for irrigation purposes, thereby reducingpressure on the groundwater aquifer.

2 1 5 State Water Project Exchange Water



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As described in Section 2.1.1, CVWD and DWA obtain imported water supplies from the SWP, which ismanaged by DWR. The imported water is used to recharge groundwater supplies in the Coachella Valley.The SWP includes 660 miles of aqueduct and conveyance facilities, from Lake Oroville in the north toLake Perris in the south. The SWP is contracted to deliver 4.1 million acre-feet per year to 29 contractingagencies. CVWD and DWA are two of these agencies holding long-term water supply contracts for SWPwater. CVWD s entitlement to SWP water is 23,100 acre-feet per year, while DWA s is 38,100 acre-feetper year. The combined entitlement for CVWD and DWA is 61,200 acre-feet per year. A copy ofCVWD s SWP entitlement is available for review at the CVWD administrative offices.

CVWD and DWA do not directly receive SWP water. Their SWP water is delivered to MWD pursuant tothe aforementioned exchange agreement with MWD. MWD in turn delivers an equal amount of ColoradoRiver water to CVWD and DWA at the Whitewater River. (See discussion in Section 2.1.1).

At this time the SWP water is used for direct recharge of the Upper Valley aquifer and is not directlyavailable to the Polo Estates Project. However, the SWP water benefits the Polo Estates Project byrecharging the Upper Valley aquifer, which in turn recharges the Lower Valley aquifer on a limited basis.

2.2 Projected Water Supplies

CVWD relies on groundwater for its domestic water purposes and on its Colorado River entitlement foragricultural purposes. Surface water and recycled water from wastewater treatment plants and fish farmsare additional supply sources used to meet water demands in the Coachella Valley. SWP water is used toreplenish the groundwater supplies. Currently, there is sufficient groundwater storage to buffer theCVWD from water shortages.

During a typical drought, such as in the late 1980s and early 1990s, the CVWD releases its SWPentitlement for use on the Coastal Plain. This release was done in accordance with groundwater bankingarrangements made with the MWD and the DWR. The stored water is reclaimed by DWA and CVWD,while MWD receives DWA s and CVWD s SWP supply.

CVWD has estimated that it has an adequate water supply through 2035, well beyond the 20-yearplanning period required for a WSA. The proportion of water from each of the current water supplysources will chcmg cignifir nntly by 2 35 relative to 1999 conditions see Section 2.1, Existing WaterSupplies). In 2035, roughly 22 percent of the demand will be supplied by groundwater, 53 percent with



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Canal Water, 6 percent by recycled water (including municipal wastewater, fish farm effluent, andirrigation drainage), 17 percent by SWP water, and 1 percent by surface water. These changes reflectCVWD s efforts to reduce groundwater use and overdraft by augmenting other existing water supplysources and reducing demands of users. The dependency on groundwater will be reduced from56 percent of the water supply in 1999 to 22 percent in 2035. District sources that will be augmentedinclude the Colorado River water, SWP water, Whitewater River and recycled water. Table 2.2-1compares existing water supplies (1999) with projected water supplies in 2015 and 2035.

2 2 1 Groundwater

Groundwater has historically provided most of the water required for golf courses in the Upper and LowerValleys. Consistent with the CVWMP, golf courses in the 1D-1 service area will rely more heavily onCanal Water and recycled water in the future. All new golf courses within the 1D-1 service area arerequired to use recycled water as their primary source. Agricultural uses will also shift to use of CanalWater. The groundwater basin contains over 30 million acre-feet in storage in the first 1,000 feet and is ahighly reliable source of water. Groundwater will primarily be used for domestic uses in the future.

As discussed above in Section 2.1.1 and below in Sections 2.2.3 and 3.1, some elements of the CVWMPcall for recharge and in-lieu usage programs in the Lower Valley to help offset the overdraft.



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Table 12-1Summary of Projected Water Supplies (acre-feet per year)

Source 1999 2015 2035Canal WaterCrop Irrigation 266,400 268,900 292,100Golf Courses 7,500 34,000 35,300Duck Clubs 600 600 600Fish Farms 1,600 1,500 1,500Recharge 3,000 45,800 80,000Domestic 200 200 31,500

Groundwater 282,500 201,400 183,200Surface Water 6,900 5,900 5,900SWPRecharge 90,600 81,300 103,000

Irrigation 0 39,700 37,000Recycled Water

Municipal 8,100 31,600 38,100Fish Farm 1,500 4,900 4,900Agricultural 0 8,000 11,000Drainage

Total Supply: 668,900 723,800 824,100a Includes 35,000 acre-feet per year of SWP entitlement water delivered through the Coachella Canal.b Groundwater supply is total groundwater pumpage less artificial recharge.SOURCE: CVWD, Coachella Valley Water Management Plan, November 2000, p. 5-15.

2.2.2 Surface WaterThe local surface water source depends on climatic conditions, but represents less than one percent of thesupply. Historical data since 1936 show that the minimu m production of 4,000 acre-feet per year. Theexpected yield is 5,900 acre-feet per year, as shown in Table 2.2-1.2.2.3 Coachella Canal Water Colorado River Water)

As described earl ier, the CVWD, ID-1, and MW D reached agreem ent on the key terms that wil l benecessary eleme nts in a forma l QSA regarding a division and quantification of their respective shares ofColorado River water. Under the Agreement, CVWD' s base entitlement under its share of the Priority 3aallotment is capped at 330,000 acre-feet per year. When all w ater transfers have be en com pleted, CVWDwill have a total diversion of 456,000 acre-feet per year at imperial Dam as show n in Tab le 2.2-2. Afterdeducting conveyance losses, about 441,000 acre-feet per year will be available for use in the Valley by



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2033 and remaining at that level through 2035. Of this amount, about 83,000 acre-feet per year willreplace, groundwater pumping source substitution). The remaining 80,000 acre-feet per year will be usedfor groundwater recharge. The QSA provides the mechanism for obtaining the additional Colorado Riversupply needed to implement the CVWMP. The term of the QSA is 45 years. A copy of the draftQuantification Settlement Agreement is available for review at the CVWD administrative offices.

Although the CVWMP has been designed to coincide with the terms of the QSA, CVWD intends toproceed with the Plan regardless of the outcome of quantification. If the Settlement Agreement is notexecuted, CVWD will seek other sources of water to eliminate overdraft and to meet the needs of theValley. More specifically, CVWD is currently seeking additional long-term entitlements from other StateWater Project contractors or the permanent transfer of water rights from other water right holders and willvigorously pursue water conservation and source substitution programs. Since CVWD would beconstrained by the existing Colorado River allocations, its use of Colorado River water would be withinthe 3.85 million acre-feet per year allocation to the first three priorities. CVWD will attempt to obtainsome or all of the water required through transfer of conserved water from IID.

2 2 4 Recycled WaterTable 2.2-1 summarizes the current and projected recycled water supplies through 2035. Recycled wateris also used to recharge groundwater.

Table 2.2-2CVWD Deliveries Under the Quantification Settlement Agreement

Component Acre-feet per yearBase Allotment 330,3001988 M WD /ID-1 Approval 20,000AgreementCoachella Canal Lining to MW D) -26,000To M iscellaneous/India PPR s -3,000ID-1/CVW D First Transfer 50,000ID-1/CVWD Second Transfer 50,000MW D SW P Transfer 35,000Total Diversion at Imp erial Dam 456,000

Less Conveyance Losses 15,000Total Deliveries to CVW D 441,000SOURCE: CVWD, Coachella Valley water Management Plan, November 2000, p. 7-9.



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2.2.5 State Water Project SWP) Exchange Water

Although not a direct source of supply to meet demand, SWP exchange water is accounted for in currentand projected supplies of groundwater (in Tables 2.1-2 and 2.2-1) and is an important groundwaterrecharge supply source for the groundwater basin.

Reliability studies performed by DWR on CVWD s and DWA s combined entitlement indicate that it canprovide and average supply of about 50,000 acre-ft/yr. In 1996, CVWD and DWA recognized the needfor additional imported water in order to eliminate groundwater overdraft. Since then, the districts havepurchased additional Pool A, Pool B and interruptible water from the SWP resulting in average purchasesof 142,000 acre-ft/yr. These additional supplies are not expected to be available in the future and cannotbe relied upon to provide a reliable long-term source of water to the Coachella Valley.

CVWD and DWA are currently negotiating the transfer of 100,000 acre-ft/yr of SWP entitlement fromMWD. As proposed, MWD would permanently transfer 100,000 acre-ft/yr of its SWP entitlements toDWA and CVWD. In dry years when SWP or Colorado River Supplies are reduced, MWD will have theability to buy back some or all of the transferred water. It is envisioned that within any given period,CVWD and DWA would take the water on average one third of the time resulting in a long term averageof an additional 30,000 to 35,000 acre-ft/yr for the Valley. The water obtained from these proposedtransfers would be exchanged with MWD for Colorado River water delivered either to the WhitewaterRiver turnouts or to the All-American Canal at Imperial Dam. Total projected SWP exchange watersupplies are summarized in Table 2.2-1.

2.3 CVWD Conservation Efforts (Demand Management Measures)

The CVWD recognizes the importance of conserving water in order to reduce pressure on thegroundwater supply. For example, water efficient methods such as drip irrigation have changed the faceof farming in the Coachella Valley. Conservation measures can be applied to all water uses; however, inthe Coachella Valley, the primary focus of water conservation is on municipal, agricultural irrigation, golfcourse irrigation and fish farm uses. As part of its planning efforts, the CVWD adopted a DemandManagement Program. CVWD has implemented a number of the following Demand ManagementMeasures (DMM) listed below (UWMP, pp. 28-32).



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DMM 1 Water Survey Programs for Single-Family Residential and Multi-Family ResidentialCustomers

DMM 2 Residential Plumbing RetrofitDMM 3 System Water Audits, Leak Detection and RepairDMM 4 Metering with Commodity Rates for All New Connections and Retrofit of Existing

ConnectionsDMM 5 Large Landscape Conservation Programs and IncentivesDMM 6 High Efficiency Washing Machine Rebate ProgramsDMM 7 Public Information ProgramsDMM 8 School Education ProgramsDMM 9 Conservation Programs for Commercial, Industrial, and Institutional AccountsDMM 10 Wholesale Agency ProgramsDMM 11 Conservation PricingDMM 12 Water Conservation CoordinatorDMM 13 Water Waste ProhibitionDMM 14 Ultra-Low Flush Toilet Replacement

CVWD s water conservation goals include reducing urban water demand by 10 percent, agriculturalwaste demands by 7 percent, and golf course demands by 5 percent. Implementation of the abovemeasures enables achievement of these goals.

The CVWD has also implemented a number of infrastructure improvements (canal improvements,distribution system and pipeline improvements, reservoir construction to store Colorado River water) thateliminate seepage and evaporation losses.

The City and the Authority can participate in conservation efforts by adopting a landscape ordinancesimilar to the Model Landscape Ordinance and by participating in other conservation programs. Theseconservation efforts will reduce the demand on the aquifer.



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SECTION 3.0 PROJECTED WATER DEMAND ANALYSIS3.1 Projected Water Demands

As noted earlier, Water Code Section109l 0(c)(2) provides that if the projected water demand associatedwith the proposed project was accounted for in the most recently adopted urban water management plan,the public water system may incorporate the requested information from the urban water managementplan in preparing the elements of the WSA.

Generally, demands for water in the broader Coachella Valley are divided between urban uses (municipaland domestic, industrial, and golf courses) and agricultural uses (crop irrigation, fish fanning,greenhouses, and duck clubs). The economy in the Coachella Valley is largely driven by tourism andagriculture. Municipal and domestic demands are expected to increase at a faster rate than agriculturaldemands primarily due to population growth. Coachella Valley s population within the study area isprojected to increase from 285,000 in 2000 to 414,000 in 2020, and then to 529,000 in 2035, a growth of31 percent and 46 percent, respectively. Growth will be more rapid in the Lower Valley, wherepopulation is projected to nearly double by 2035.

The Authority will provide domestic water service for the Polo Estates Project from groundwater that willbe pumped from new on-site or nearby pumping wells. Build-out of the project will involve thedevelopment of an estimated 214 acres of residential uses and 20 acres of commercial/mixed uses.CVWD has developed consumption estimates by development type, which are used below to calculateannual consumption. Based on these consumption factors, the project will probably demandapproximately 1.25 million gallons per day (mgd) or about 1,399 acre feet per year as shown on Table3.1-1. This water demand will be partially offset by the elimination of those uses at the site (somedomestic and some irrigation) currently supplied by the Authority or CVWD.

Table 3.1 1Estimated Polo Estates Project Water Service DemandsDemand

Factor emand emandLand Use nits Quantity (af/ac/yr) aflyr) mgd)

Residential cres 14 .09 ,303.26 .16Commercial / Mixed Use 0 .81 6.20 .09

Total: 1 399.46 1.25Note: gpd = gallons per acre per day; mgd = million gallons per day; ac = acre; of = acre feeta Based upon EIR project description and associated Addendum.b Based on CVW D water demand generation factors:



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To receive water service, the applicant would be required to pay several fees to the Authority, including(1) water meter charges and (2) basic rates and charges. The City of Indio also would require theapplicant to pay Capital Impact Fees, payable when building permits are pulled, of 2,200 per residentialunit. The applicant would not be required to pay Capital Impact Fees for the commercial site.

CVWD is currently developing recharge sites to recharge the lower aquifer and will benefit the PoloEstates Project as well as other projects throughout the City of Indio. In order to pay for the costs toimport water and recharge the aquifer, CVWD will develop a Replenishment Assessment Charge (RAC)that will be paid by all major well users within the area of benefit, including CVWD, the Authority,farmers, etc.. CVWD will review and adjust fees and charges periodically to account for changingimported water costs. It is anticipated that the Authority will pass through the RACs to the users in thePolo Estates Project. In this way, the Polo Estates Project will help for the cost of importing equal waterto replenish the aquifer withdrawals.

As noted earlier, Water Code Section10910(e)(2) provides that if the projected water demand associatedwith the proposed project was accounted for in the most recently adopted urban water management plan,the public water system may incorporate the requested information from the urban water managementplan in preparing the elements of the WSA.

The above-described water demands for the Polo Estates Project have been taken into account in CVWDwater demand projections. The CVWMP water demand projections take into account land use plansprepared by the City of Indio and other Coachella Valley jurisdictions combined with an extrapolationmethod that also takes into account historical housing and permitting trends. The land uses and intensityof uses proposed within the Polo Estates Project are consistent with the City of Indio General Plan LandUse designations for which the CVWMP and District water demand projections rely (see Section 1.0).For these reasons, the Polo Estates Project land uses and associated population were accounted for in theCVWD' s water demand forecasting.Projected water demands included in this WSA for the Coachella Valley are based on data provided in theCVWMP. The data provided in the CVWMP included baseline 1999 data and future data for 2015 and2035. For the purposes of this WSA, this data was extrapolated (assuming a linear progression) to reflectcurrent 2002 and future water demands over a 20-year period in 5-year increments, as required underSB 610. Current water demands and future projections for the whole of the Coachella Valley are shown



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in Table 3.1-2 for urban and agricultural uses. Between 1999 and 2035, the total demand for water isprojected to increase by about 23 percent. The domestic water demand has grown about 40 percent overthe last 10 years. Domestic water demands (municipal and industrial, and golf courses) are expected tocontinue to grow by about 27 percent over the next 20 years (from 2002 to 2022) with implementation ofthe CVWMP and its measures to reduce water consumption.

Table 3.1-2Summary of Projected Normal/Average Year Demand for the Coachella Valley

By Land Use Category (acre-feet per year)

Water Use 1999 2002 2007 20012 2015 2017 2022 2035Agriculture 333,000 329,756 324.350 318,944 315,700 316,400 318,150 322,70Municipal andIndustrial 204,000 211,913 225,100 238,288 246,200 255,530 278,855 339,50Golf Courses 106,200 110,944 118,850 126,756 131,500 131,500 131,500 131,5Fish Farms andDuck Clubs 25,400 26,338 27,900 29,463 30,400 30,400 30,400 30,4Total Demand: 668,900 678,950 696,200 713,450 723,800 733,830 758,905 824,1a Dem and projections for 1999 2015 and 2035 contained in the CVWM P serve as the basis for extrapolating water demand data in interim years.SOURCE: CVWD Coachella Valley Waster Management Plan November 2000 p. 5-15.

From about 1961 to 1999, the demand for agricultural irrigation has slightly decreased due to the farmersshifting to drip irrigation while the demand for golf, landscaping, fish farms and duck ponds hasincreased. In the Lower Valley agriculture accounts for about 95 percent of the current demand,compared to the Upper Valley where agricultural has been supplanted by urban development. Over thenext 20 years, agricultural water demands are expected to continue to decrease from current conditions.

3.2 Normal and Dry Year Demand and Supply

As part of its UWMP, the CVWD is required to provide an assessment Of the reliability of its waterservice to its customers during normal, dry and multiple dry water years. This water supply and demandassessment compares the total water supply sources available with the total projected water use through2035 for a normal year, a single dry water year, and multiple dry water years.

As discussed previously, the supply of groundwater is sufficient to meet all demands beyond the year2035. The purpose of the CVWD s planning efforts embodied in the CVWMP is to reduce pressure onand replenish the groundwater supplies so that it remains a long-term reliable water supply. There havenever been deficiencies with this source and none are anticipated in the future. Typically, Canal water is



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very reliable, but it is subject to cutbacks as mandated by the Federal Government. Deficiencies withrecycled water are seasonal. Surface water supplies have varied between 4,000 to 9,000 acre-feet peryear. It is anticipated that the worst-case scenario is a reduction from 6,500 acre-feet to 4,000 acre-feet ofsurface water over a three-year period. Also, CVWD permits the SWP water to go to MWD duringdrought periods. However, this water is used to recharge the groundwater basin and is not now used as adirect supply source. In the worst-case scenario, it is anticipated that this replenishment water is reducedto 0 acre-feet per year for three years and Canal water is reduced. The supply of groundwater is sufficientto offset the deficiencies of these other water supply sources, even during a three-year drought. Thissource of water together with reliable Canal water represent 97.5 percent of the historical water supplyand are considered reliable even during drought conditions. However, if necessary, the aquifer alonecould supply 100 percent of the Coachella Valley s demands for a three-year period.

Table 3.2-1 compares water supply and demand projections from Tables 2.2-1 and 3.1-1, respectively.The supply totals do not reflect the full potential capabilities of the CVWD s identified water sources. Asshown in Table 3.2-1, water supplies are sufficient to meet projected Valley-wide demands through 2035.Water supply would be sufficient to meet demands in all interim years.

Table 3.2-2 shows that water supply and demand under the three scenarios as remaining constant. This ispossible due to the sufficient supply of groundwater and Canal Water in the Coachella Valley and theCVWD s ability to store a substantial amount of water in the groundwater basin during wet years. Thestored water is key to a reliable long-term water supply and necessary to provide sufficient water supplyduring single dry, and multiple dry years.

Table 3.2 1Projected Supply and Demand Comparison for Normal/Average Year (acre-feet per year)

1999 2015 2035Supply T otals 668,900 723,800 824,100Demand Totals 668,900 723,800 824,100Difference 0 0 0

25 olo Estates ProjectWater Suppltj ssessment


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Table 3.2-2Single Dry and Multi& Dry Water Years (acre-feet per year)

Mnitiple Dry Years

WaterSupply.Sonrces 2002Single DryWater Year Year 1 . Veal 2. Year .3Supply Totals 678,950 678,950 678,950 678,950 678,950

Percent Shortage 0 0 0 0 0Demand Totals 678,950 678,950 678,950 678,950 678,950Difference 0 0 0 0



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SECTION 4.0 CONCLUSIONSThe type and intensity of commercial development proposed by the Polo Estates Project are consistentwith the City of Indio General Plan and, therefore, are included in water demand projections contained inCVWD planning documents.

As demonstrated in this WSA, existing and planned water sources will be sufficient to meet projectedValley-wide demands in a normal year, a single dry water year, and multiple dry water years through2035. Again, the water demands of the Polo Estates Project were accounted for in CVWD s Valley-widewater demand projections; For these reasons, the CVWD considers its water supplies to be adequate tomeet the project demands.



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W ritten Verification of W ater upplyGovernment Code Section 66473.7 and Water Code Section 10910)

Public Water System: ndio Water Authority

Subdivision Applicant: olo Estates, LLC

Project Information:Project Title: Polo EstatesType of Project: Combination of 214.4 residential acres and 20 commercial acres

with up to new 1,250 residential units and 261,000 square feet of new commercial space(gross leasable area).

Number of Existing Service Connections: 0 (not presently developed)Water Supply Assessment:On July 21, 2003, the Indio Water Authority ( IWA ) Commissioners adopted the IndioUrban Water Management Plan. Thereafter, on September 15, 2003 the Commissionersadopted the Water Supply Assessment for this project.A sufficient water supply is available for the project.The total water supplies available to the project during normal, single-thy, and multiple-dry years with a 20-year projection will meet the projected water demand of the project inaddition to the demand of existing and other planned future uses, including, but notlimited to, agricultural and manufacturing uses. The water supply includes groundwaterbut the owner does not have the right to access such groundwater to serve the subdivisionexcept as set out in the Water Supply Assessment and Urban Water Management Plan.Evidence for Water Supply AssessmentThe foregoing determination is based on the following Water Supply AssessmentInformation and supporting information in the records of the Indio Water Authority andthe City of Indio.The Water Supply Assessment for the Proposed Polo Estates Project dated May 2003,and prepared pursuant to Water Code Section 10910 et seq. documents that the IWA hasan amply water supply for the next 20 years, even through reasonably foreseeableextended periods of drought, as a result of existing entitlements, rights and contracts forwater supplies to the Water Authority itself and those held in conjunction with the


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Coachella Valley Water District. Such water supplies presently are available to serve theprojectThe Water Authority and the City currently have sufficient facilities to deliver theavailable water supply. The project requires only the extension of existing water linesfrom Jackson Street and Odlum Drive, south to and along the perimeter of the proposedsubdivision, consistent with the City s adopted Water Master Plan. (Section 66473.7 (c)).

Dated:Amir Modaressi, Interim Public Works Director/City Engineer

iwater assessment for polo estates wa agenda, 30, 091503

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