Indio Water Agenda December 6, 2006 Citrus Ranch.x PDF

8/12/2019 Indio Water Agenda December 6, 2006 Citrus Ranch.x PDF

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PLEDGE OF ALLEGIANCE

INDIO WATER

AUTHORITY

SPECIAL MEETING

AGENDA

December 6 6at 5 p

5 Cvc Center Mall

Indio California

Cal to Order and ROLLCALL President Gene Gilbert

Vice President Ben Godfrey tCommissionerJerryBarba VCommissioner Bertha Bastidas

Commssioner Melanie Fesmre 4Commissioner Richard Friestad

Commissioner Steve SanchezCommissionerLupeRamosgatsonCommssioner MchaelWlson

i6itivr


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Indio Water AuthorityDecember 6 6 Special Meeting Agendacontinued

5 Executive Director Report

6 Commissioner comments and o uestions

ADJOURN

DECLARATION OF POSTING

I Cynthia Hernandez Secretary of the Indio Water Authority do hereby declare that the foregoingagenda for the meeting ofDecember 6 6 was posted onthe outsideentry to the Council Chamber 5 Civic Center Mall on December 6

Dat December

2iaHernandez Secretary

NEXT REGULAR MEETING

December 8 2 6at 5 p

PUBLIC NOTICE

The Indio Cty Council Chamber is andicapped accessible Persons with disabilities can receve the agenda in an lternativeformat and should call the City Cerks ffice at 76 9 6 otification 48 hoursprior toa meeting will enable the City to makereasonable arrangements to ensureaccessibility to that meeting 28 CFR 35 2 35 4 ADA Ttle


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INDIO WATER AUTHORITY

AGENDA REPORT

TO Honorable President and Members of the ndio Water Authority

FROM Genn D outhard Executive Drector

DATE December 6 6

SUBJECT Water Supply Assessment WaterVerificationLetter

Citrus Ranch Residential Development

SUMMARY

A Water Supply Assessment and a Water Verification Letter havebeen completed for heCitrus Ranch Residential Development Project in accordance with State law per SenateBills 6 supply assessment and22 verification letter

STAFF RECOMMENDATION

Approve the Water Supply Assessment and Issuance of the Water Verification Letter forthe Ctrus Ranch Residential Development Project in a form acceptable to the CityAttorney


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IWA Agenda ReportDecember 6 6

WaterSupply Assessment Verification Letter Citrus Ranch

Page 2

urban water management plan approved in ugust 2 6 The main purpose of ths watersupply assessment is to examine the current condition of the Coachella ValleyAquifer andmor e specifically determne if he aquifer is adequate to suppjy the Ctrus Ranch

Residential Development Project Theproject consists of up to 3 7 dwelling units a olfcourse with amenties a outique hotel and a ommunity center

The Water Supply Assessment for the Citrus Ranch Residential DevelopmentProjectfound that there are sufficient water supplies to meet the demands of the project The

project applicant will work with staff to implement the required water facilities to meet thedomestic and fire low demands of the project

Senate Bll 22 takes a ifferent approach and addresses the other end of a esidentialprojects pprovalprocess Per this law cities must impose a ondition upon entativesubdivision map approval requiring that a developer demonstrate that a sufficient watersupply will be available to serve the subdivision before thefinal mapcan be approved SB22 applies only to large subdivisions of 5 units or more subject to two exemptionsUnder SB 2 uch large subdivisions will be required to produce proof of water

availability in he orm of a written verification from the applicable public water supplierThe wat er verification letter for he Ctrus Ranch Residential Development Project is

incorporated in ATTACHMENT A

FINANCIALREVIEW

None

PUBLIC NOTICE

This item has been noticedthrough the regular agenda notification process Copies of thedraft report will be made available at theCty Hall public counter and the Indio PublicLibrary


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ATTACHMENT A

Ct rusRanch Resdenti a C ent


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,ifos r1;aP-00fitAktf, eatatiVol Rw;eilitie Coatity 4S thw rrgq ts Ott aittsielattto nettlace a wry* .0 'lict alitorniazstaatt,d daddFral amtplythi10CSaVVY.14ht'data Th ' as tar rataten. prtly and aho uld rsorlia veil Iktr canthutAnon.

SPRINGS

CATHEDRAL

Citrus Ranch

Project Site

PALM DESERT

INDIAN W PUS DIO

COAG'HEfft,

Geographic nformation Systems

svl t

wow/.

StanteC '3.733 :.'rec `ri,e t 00 PM --- Desalt Cr 0:230 "'lo: P,' "tt ar s 4 5 .

Figure 3- 1

egional Location MapCitrus Ranch - a Sun-C, 1 JCV .rlopnt r

rGrV

WJ


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CITRUS RANCH WATERSUPPLY ASSESSMENT AND VERIFICATIONIntroduction

October 7 6

2 ntroduction

2 BACKGROUND

The proposed Citrus Ranchcommunityncludes the development of a imately 3 75 nits

Since ths Project is subject to the California Environmental Quality Act CEQA process and sa subdivision as defined by the CaliforniaGovernment Code Section 66473 7 he Indio Water

Authority IWA he Public Water System PWS for the Project has determined that a WaterSupply Assessment WSAs necessary to complete the Projects EQA process and that awritten Water Supply Verification WSV is needed to approve the P eot

2 URPOSE OF DOCUMENT

Upon request of ocal governmenta

PWS is equired by aw to rovide documentationregarding the water supply for new projects Thsinformation is ncluded in he CEQAdocumentation and it becomesevidence used in the approvalprocess

2 Water Supply Assessment

Senate Bll 8 O SB CU was enacted in2 oo in January B8amended Section 2 5 9 the Public Resources Code 8B 8 aso amended Sections

83 658 9 9 2 and 9 5 repealed Section 9 3 and added andamended Section 657 of he Californa V ter Code Itrequires cities and counties to requestspecific information on water supplies from the PWS that wouldserve any project thetiaaubiaotto CEQA and is efined as a Project in Water Code Section 2 Thsinformation is to be


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CITRUS RANCHWATERSUPPLY ASSESSMENT AND VERIFICATIONIntroduction

October 7 6

2 Application of WSA

AWSA is required since the P jeothaoover5OOhouaingunhamndheoPo s defined byWater Code Section OQ 2

23 Application of WSV

A WSV is equired since the Project hoaover5 housing units and is a Subdivisionasdefined by Government Code Section 664737

2 UBLIC WATER SUPPLY

2 eneral

A portion of the project is ocated within the current boundaries of the Indio Water AuthorityIWA service area The Citrus Ranch development is ncluded in the projected demands in henewly updated Urban Water Management Plan UWMP August 2 6

This Project will be completely within the VVA service areaonce the is annexed intothe Cty of ndio and subsequently into the IWA servi see Figure 2 WA i the PWSfor this location The IWA currently se residents and businesses inthe Cty of ndio VV Acurrently has a groundwaterproduction capacity of 27 acre ee eryear

25 XISTING WATER MANAGEMENT PLANS

The Indio Water Authority completed an Urban Water Management Plan in August 2 8 Ths

document was approved by the Board of the Y omprised of Cty of ndio Cty Council


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uture Adi l lter

AVENUE38

rgpo WARMA

AVEAAAE 45

nor

a


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Table

Year

3 istorical and ProjectedConsumption

Metered Water ConsumptionAcre eet

Metered Water

Source

985 3 2 UWMP 986 2 7 2 UWMP 987 2 38 2 UWMP 988 2 6 2 UWMP 989 4 8 2 UWMP 99 247 2 UWMP 99 24 2 UWMP 992 2 72 2 UWMP 993 3 34 2 UWMP 994 4 4 2 UWMP 995 5 57 2 UWMP 996 6 2 2 UWMP 997 2 45 2 UWMP 998 5 83 2 UWMP 999 6 93 2 UWMP

Stantec

CITRUS RANCHWATERSUPPLY ASSESSMENT AND VERIFICATIONWater Demands

October 7 6

3 ater Demands

3 HISTORICAL AND PROJECTED DEMANDS OF IWA CUSTOMERS

Basedon metered water consumptiondata IWA consumed an average of 2 7 cre feet peryear in 2 5 Table 3 hows historical and projectedmetered water consumption from theIWA UWMP August 2 6 ncluding the projecteddemands of the Citrus RanchdevelopmentTable 3 2 hows the projected water demands on IWA by categoryCitrus Ranch is ncludedinths able from he WA UWMP


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CITRUS RANCHWATERSUPPLY ASSESSMENT AND VERIFICATIONWater Demands

October 7 6

3 PROJECT DEMANDS

Thedemands for the project have been calculated based on the Cty of Indio criteria asestablished in her UWMP Based on these consumption factors the Project will demandapproximately2 75 gallons per rninute or 3 6 illiongallons per day excluding fire lowmaquinsrnentm as shown in able 3 etailed breakdown o the demands from he

development is ncluded in Appendix A

TABLE 33 STIMATEDPROJECT WATER SERVICE DEMANDS

Land Use

Residential

Low DensityMediumDensityHigh Density

Commercial

736

Gof Course

Cubhouse

35

Hotel

Open SpaceCommunity CenterV orneooTrols

Undisturbed OpenSpaceCommunity ParksNeighborhood ParksCtrus Grove Paseos

Recreation OS

Unts

4

3 3

Density DemandQuantity Factor Factor

ac capt a ce pcd

275 3

254

54 3

5

6

5

87 4

6

8

3

3 6

23 8

56 5

56 5

282

282

282

282

282

282

282

282

282

282

AverageDemand

733 2

83 9

372 2

59 5

8

96

7 4

4

43

Max ay Peak HourDemand Demand

99 8

775 8

558 3

89 2

99

94

6

7

64

2 99 6

355 6

6 5

78 5

98 3

88

22

2

4

3


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CITRUS RANCH WATERSUPPLY ASSESSMENT AND VERIFICATION

Water SuppliesOctober 7 6

4 Water Supplies

The first substantive requirement of a 8B8 Water Supply Assessment WSA is the

identification and description of the existing water supply sources in the public water system thatwill serve the p joot Water CodeSection O9 Od equires oV Ato nclude an identification

of existing water supply entitlements water righta or water service contracts relevant to theidentified water supply forthe proposed project and a escription of the quantities of waterreceived in prior years bythe publicwatersystem

As the proposed project has been included in the UWMP of the proposed water auooimny theinformation contained herein is eferenced from these documents aa well as other supplyassessments of similar projects The City of Indio and CVWDshare many of the water suppliestherefore a single discussion of each of the water supplies is described herein

For planning purposes the Coachella Valley can be divided into two areas the Upper Valleyand Lower Valley The UpperValley includes the cities of Palm Springs Cathedral CdvRancho Mrage PalmDesert Indian Wells and Desert Hot 8phngsand the unincorporatedcommunties o Thousand Pe m Garnet North Palm Springs and VVhtavvmter Thesecommunties include major resort destinations major residential developments and

approximately 8 olf courses The Lower Valley includes the cities of La Quinta IndioCoachella and the unincorporatedcommunities of Thermal Bermuda Dunes and Mecca

Farming activities are arge in he Lower Valley in 999 here were about 72 rrigatedacres o armland The LowerValley a o has fish arms and greenhouses that thrive on thewarm groundwater in geothermal areas


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CITRUS RANCHWATERSUPPLY ASSESSMENT AND VERIFICATJON


The Cty of Indio and the CVWDshare a ommon groundwater source with the Desert WaterAgency DWA the City of Coachella and the Myoma Dunes Mutual Water Company CVWDmanages the Coachella Valley Basin The Coachella Valley s roundwater basin can be

described as a giant bathtub full of sand with the high end at the northwest edge of the valleynear VVhitevvoter and thelow and at he Salton Sea In the Lower Valley several imperviousclay layers lie between the ground surface and the main groundwater aquifer Water applied tothe surface in the LowerValley does not easily reach the ower groundwateraquifers due to the

impervious clay layers However CVWDs oachella ValleyFinal Water Management Plan2 2 determined thatthis sub asn tilldoeshave significantartificialrecharge capabilitiesdespite these l ess han dea eologic characteristics of the ayers overlying the aquifer

Groundwater is umped from underground aquifers that are estimated to store roughly 3million ace ee of water much of which originates from off from adjacent Table

4 hows historicalgroundwateruse in 936 and 9 By 999 groundwateruse in heCoachel laVaIIey had increased by more than four times the use in 936 Groundwater supplied

about 56 percent of the total 999 demand 93 percent in the UpperValley and 38 percent intheLower Valley In 938 groundwatersupplied nearly 96 percent of the otal demand Total

groundwater use in the entire Coachella Valley in 996 was about 35 ace ee per yearGroundwater use throughout the Coachella VaIIey has increased t i to t se evels

of approximately 375 ace ee er year Indio WateAuthority withdrew 2 7 ace eefrom its groundwatersources in 3 5 less than 3 ercent of the total overall draw from theCoachella Valley Groundwater Basin The hstorical 995 and future through 2 3

groundwaterproduction by sub asn or all producers can be found in the CVWD Urban Water

Management PIan 2 5 and is attached in Appendix B

Table 4

Summary of Historical Coachella Valley Water Supplies ace ee er year


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CITRUS RANCHWATERSUPPLY ASSESSMENT AND VERIFICATION


Authority Urban Water Management PIan August 2 6 Several of the new eservoirs arebeing sited and designed for start of construction around the end of 2 6

4 anal Water

TheCoachella Canal is a branch of the Al merican Canal that brings the Colorado River waterinto the mperial and Coachella Valleys The service area for canal water delivery under the

CVWDs ontract with the US ureau of Reclamation is defined as mprovement District No as an ndefined share of the 3 5 llion ace ee llocated to he Californaagricultural agencies under Priority 3a This source of water is onsidered highly reliableWater from the Coachella Canal provides a significant water supply source for the Lower Valleyincluding IWA In 9 Coachella Canal Water accounted for over 6 percent of the watersupply to the Lower Valley but less than one percent of the water supply to the Upper ValleySee Table 4 ost of ths use is or crop irrigation in he LowerValley A copy of hecontract with the US ureau of Reclamation is vailable for review at he CVWD admnstrative

offices located o85 55 venue 52in Coachella 76O g8 5

In October 999CVWD ID nd MVVD reachedagreement on the key terms that will be

necessa ryelements in a formal QuantificationSettlementAgreement QSA regarding a divisionandquantification of heir respective shares of Colorado River water The three agenciesBoards approved ths QSA in October 2 3 The intent of ths agreement is to quantify therights of each agency and allow the transfer of water between willingbuyers and sellers Details

ofthe QSAare discussed under projectedsupply below

A awsuit challenging the approval of the QSA on the grounds arising under the CaliforniaEnvironmental Quality Act is pending However it is not anticipated that a court rulingof noncompliance with CEQA would significantly affect the quantity and diversity of CVWDs


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oubstmnba

kxcept in areas where artificial recharge has successfully raised waterlevels i

at the VVhitevvotnr Spreading Facility The Coachella Valley Water Master Plan Pavailable at the Coachella office of CVWO definesactions the CVVVD will take to reventcontinuing decline of groundwater levels and degradation of groundwater quality

To address groundwater concerns the CVWD has focused efforts on obtaining importedColorado Rver Wat er The Coachella Branch of the Al merican Canal was completed with

the first deliveries of imported Colorado River water to area growers in 949 The impact ofimported water on the Coachella Valley was almost immediate By the early a aterlevels in the LowerValley had returned to their historical highs

Althoughgroundwater Ievels in the Lower VaIIey hadstabilized water levels in the Upper VaIIeycontinued to ecine In 963 the CVWD and DWA entered into contracts with the State of

Californiafor entitlementsto State Water ProjectSWP water To avoidthe estimatedcost ofconstructing an aqueduct to bring SWP vvaterdirectly to t Coachella Valley the CVWD and

theDWA entered into an agreement with the Metropolitan Water District of Southern CaliforniaMWD to xchange Colorado Rver water for SVVP water Starting in 73 the CVWD andVVA began exchanging their combined annual SWP entitlement of 8 ace ee with MWDto recharge UpperValley groundwater supplies at the V bmvvatorSpreading Facility whererecharge was known to be effective As of 999 more than 7 llion ace ee of ColoradoRver water received ter has been percolated into the CoachellaValley aquifer Copies of the CV Ds WP entitlement with the State and the ExchangeAgreement with MWD are available for review at the CVWD administrative officeslocated at headdress in Coachella

In 984 CVWD and DWA entered into an advanced delivery agreement with MWD to percolateadditionalColorado River supplies in the Upper Basinduring periods of surplus water availabilityi


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In 898CVWD and DWA recognized the need for additional imported water in rder toeliminate groundwater overdraft In recent years the wo districts have been able to purchaseadditionalSVVPwater for recharge in the Upper ValIey In addition both agencies have plannedto continue their efforts to obtain additionalpermanent water supplies as hey become availablein order to bolster the groundwaterrechargeprogram

4 GroundwaterDemand Management Measures

Since the Coachella Valley Groundwater Basin is not an adjudicated basin here are no deededrights to withdraw water As part of IWAs upport for the CVWD efforts to echarge theGroundwater Basin IWA pays a Water Replenishment Assessment to assist in paying for herecharge programs discussed above Theestimatedassessment for fiscal year 2 5 6 orthe 2 active wels in IWAs ystem is 46 n addition to paying the Water

Replenishment Assessment CVWD dentified that water conse ti nand ource substitution

would also contribute to preserving the reliability of the VVhitmvmaterRiverbasin to supplyexisting and future residents of the Coachella Valley

There are several other management measures that both CoachellaIndio Water Authority have established for the conservation of groundwater to revent anoverdraft condition in the Coachella Valley Since CVVVO manages the entire CoachellaValleybamin ther demand management measures will have an effect onthe amount of groundwateravailable to WA

4 CVWDManagement MeasuresGroundwater has hstorica providedmost of the water required for golf courses in he Upper


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with CVWD to implement valey de onservation programs see Section 8 ater DemandManagement Measures of the WA UWMP August 2 6

43 Existing Surface Water

Surface water supplies come from several local rivers and streams including the V itevvaterRverSnow CreekFallsCreek and Chno Creek Table 4 hows hstorical surface water

use in 936 and 99 In 9 9 surface water supplied approximately three percent of the watersupply to he UpperValley to meet municipal demand Because surface water is affectedbyvariations in annual precipitadon the annual supply is ighly variable Since 938 the

estimated historical surface water supply has ranged from roughly 4 o ce ee eryear Ths supply has historically not been available to IWA for use in heir system

44 anal Water

The CVWMP 2 2 includes plans to expand the delivery of canal water to those agriculturalfarmers that currently do not have access to the canal wate forofthe current agricultural customers of VVAustomers of IWA are included in his planned expansion whichwilleffectively reduce the demand on IWAs elivery system and the demand on the groundwaterinthe LowerValley

45 Recycled Water

Wastewater that has beenhghly treated and disinfected

and other purposes It is not suitable for use as potable water Recycled municipal wastewaterhas historically been used for rrigation of golf courses and other municipal landscaping in heUpper Valley area Table 4 hows recycled water use in 999 for the UpperValley Recycled


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CITRUS RANCHWATERSUPPLY ASSESSMENT AND VERJFICATION

Water Supplies

October 7 6

Lake Perris n he south The SWP is contracted to deliver 4 illion ace ee er year to 29contracting agencies CVWD and DWA are two of these agencies holding l ong erm atersupply contracts for SWP water CVWDs ntitlement to SWP water is 23 ace ee eryear whle DWAs s 38 ace ee per year The combined entitlementforCVWD and DWAis 8 ceee per year A copy of CVWDs WP entitlement is available for review at heCVWDadministrative offices In addition the 2 2 CVWMPprovides more details of the SWPsupply and how it s utilized

CVWD and WA do not directly receive SWP water Their SWP water is elivered to MWD

pursuant to he aforementioned exchangeagreement with MWD MWD in urn delivers an

equal amount of Colorado Rver water to CVWD and DWA at the Whitewater Rver

43 XISTINGINFRASTRUCTURE

As mentioned above the WAUWMP datedAugust 2 6 gives details about the 2 existingactive wells andtheir production rates in addition to the amount of storagecurrentlyavailabletoIWA In addition they state that there are plans for additional vveUaand storagefacilities thataredescribed more fully in a Water Master Plan that is currently being updated for 2OO8 The

report confirms that there is currently some additional capacity in heir existing infrastructure

Inaddition the CVWD and the City of Coachella operate water systemsadjacent to the City ofIndio Water system interconnections with neighboring systems are mutuallybeneficial andprovide the Cty of ndio and its neighbors with more reliable water supply The settlementagreement between the ndio Water Authority and CVWD provides for the commitment forconstruction and operation of interconnections to increase water distribution reliability for bothservice ar eas


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Water Supplies

October 7 2 6

there is sufficient groundwater storage to buffer the CVWDfrom water shortages However anyfuture alternate water supplies that CVWD can procure will decrease the dependence of theirsystem on groundvvater thereby allowing VA system that is highly dependent on

groundwater to rely on the LowerValley basin as heir mainsource of water

During a ypical drought such as in the ate 98s nd early 99s he CVWDreleases itsSWPentitlement for use on he Coastal Plain Ths release is one in accordance with

groundwater banking arrangements made with the MWD and the DVVRThe stored water is

reclaimed by DWA and CVWDwhile MWD receives DWAs nd CVWD s WP supply

Inthe CVWMP 2 5 CVWD has estimated a water supply through 2 3 well beyond the 2Oyear planning period required for a WSA Theproportion of water from each of he currentwater supply sources will change significantly by 2 3 relative to current conditions In 2 3roughly 9 percent of the demand will be supplied by groundwater 65 percent with CanalWater 4 ercent by recycled water ncluding municipal waste ter ish farmeffluent and

irrigation drainage percent by SWP water and 2 percent by desalinated drain waterThese

changes reflect theDstrict s fforts to reduce groundwater se and overdraft by ti

other existing water supply sources and reducing demand of users Dstrict sources that will be

augmented include the Colorado River water SVVP water and recycled water Tabe 4

compares existing water supplies 2 4 with projected water supplies in 2 5 and 2 3 The

estimation of supplies of groundwater is based on projections for the Whitewater and MissionCeek subbas ns As mentioned above as CVWD decreases its dependence on these

subbasins it allows IWA to rely on the Lower Valley subbasin for their primarysource of water

SUMMARY OF PROJECTED WATER SUPPLIES ace ee er year CVWDSource 2 4 2 5 23


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respective shares of he Colorado Rver water When all water transfers havebeen completedCVWD will have a otal diversion of 459 cre feet per year at Imperial Dam as shown inTabe 4 3 After deductingconveyance losses about 444 cre feet per year will beavailable for use in the Valley by 2 33 and remaining at the evel through 2 35 Of thisamountabout 83 cre feet per year will replace groundwaterpumping source substitution

Source CVWD Coachella Valley Water Management Plan 2 5

TABLE 4

IVERIES UNDER THE QUANTIFICATION SETTLEMENT AGREEMENT

acre eet per yearCom onent

Base Allotment

988 MWD ID pproval Agreement

Coachella CanalLining to MWDTo Mscellaneous Inda PPR s

ID CVWD Frst Transfer

ID CVWD Second Transfer

MWD SWP Transfer

TotalDversion at mperial DamLess Conve ance Losses

TotalDeliveries to CVWD

Acre feet per year33

2

26 3

5

53 35

459

5

444

4

Projected Surface Water

The local surface water sourcedepends on climatic conditions but represents Tess than onepercent of he supply Historicald t i 963 h th t th i i prod ction ll id


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CITRUS RANCHWATERSUPPLY ASSESSMENT AND VERIFICATIONWater Supplies

October 7 6

see Table 4 his recycled water would provide for an estimated 5 to 2 percent of the

2

total water demand by customers within the service area

Table 44 rojected Recycled Water Supply Indio Water Authority

Year

2

2 5

2 5

2 25

2 2

2 3

Population

549 4673 889 94

4 52

9 8

34 45

Wastewater

Generation AF earat gpcd

5 695 848 54 3 56 3 62 5 5

Recycled WaterSupply AF ea

2 852 924 275

5 286 87 25

Indio Water AuthorityUrban Water Management Plan 2 6

4 State WaterProject Exchange Water

Although not a irect source of supply to meet d SVVPexchange water is accounted forin current and projected au p eo and is an important groundwater recharge supply source fortheentire groundwater basin Total SWP exchange water supplies are summarized in Table 43 Future supply projections reflect the l ong erm verage SVVP supply allocated to the CVWDand DWA and additional SWP entitlements are included in the CVWDUWMP

45 MWDSC Projects

The Cty of Indio included in ts UWMP as part of its planned supply sources future MWDSC


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45 ROJECT WATER SOURCE

The potable water supply for this project is from the Aquifer The golf course willbe rrigatedusing waterfrom an existing irrigation well on site that draw waterfrom a hallow non otabeaquifer that exists in the area There will be a backup well available for he irrigation of the golfcour se In the event that any of the rrigation wells are found to be non unotione they will bereplaced by a new well that will access the same shallow aquifer and willnot exceedpastproduction on site


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Supply ReliabilityOctober 7 6

5 Supply Reliability

Water Code Section 9 c 3 rovides that if the projectedvvatardenlandoaaooatedvviththe proposed project was not accoun ted for n the most recentlyadopted urban water

management plan or the public water system has no urban water management planhe watersupply assessment for the project shall include a discussion with regard to whether the publicwater systems otal projected water suppliesavailable during normal single dry and multipledry water years during a 2 ear p aution will meet the projected water demand associatedwith the proposed project in ddition to the public water systems xisting and planned futureuses Section 3 f ths WSA determined that the proposed project s emands have beenincluded inthe Cty of Indios ugust 2 6 UWMP

The Indio Water Authority has historically had a reliablesupply of water from multiple sourcesas eviewed in Section 4 The groundwaterState Water ProjectvvaterColorado River Waterand CanalWater all serve to provide a reliable supply of water to the entire Coachella Valleyand both CVVVDand IWA have shown they have the resources to continue that supply to theirusers through the year 2 3

Thefoliowingtabies describing the projectedsupplies are takenfrom the Indio Water AuthorityUWMP August 2 6


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Table5 b Projected Supplies

Source

Native Groundwater

MWDSCExchangebaseMWDSCExchangeaddlCanal WaterRecycledWaterDemand Reduction

CityProduction

Normal

Supply acre

feet

27 89

4 39

4 27

35 55

Single Dry

Year acre

feet

2 9

4 53

4 2

5 22

37 78

Mul tpe ry Years

Year

2 9

4 53

4 2

5 22

37 78

Year 2

2 9

4 67

7

4 77

5 5

39 2

Year 3

2 9

4 8

2 24

4 52

6 79

4 26

Table 5 c 2 5 Projected Supplies

Source

Native Groundwater

MWDSCExchangebaseMWDSCExchangeaddlCanal Water

RecycledWaterDemand Reduction

CityProduction

Normal

Supply acrefeet

33 64

5 8

5

43 73

Single Dry

Year acre

feet

26 3

5 99

65

5 67

6 52

45 4

Multiple Dry Years

Year

26 3

5 99

65

5 67

6 52

45 4

Year 2

26 3

5 89

2 34

5 32

6 68

46 54

Year 3

26 3

5 8

3 2

5 97

7 84

47 94


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Table 5 e 25 Projected Supplies

Source

Native Groundwater

M W D S CExchange baseMWDSCExchangeaddlCanal Water

RecycledWaterDemand Reduction

CityProduction

Normal

Supply acre

feet

45 8

6 43

6 8

SngeDy

Year acre

feet

36 25

6 2

3

6 5

MuItiple Dry Years

Year 2 Year 3

36 25

6 3

3

6 5

36 25

6 96

2 35

7 9

36 25

6 73

3 39

7 87

58 6

8 5

59 76

8 5

59 76

9 72

6 46

9 93

62 7

Table 5 3 Projected Supplies

Source

Native Groundwater

MWDSC Exchange base

MWDSCExchangeaddlCanal WaterRecycledWaterDemand Reduction

Normal

Supply acre

feet

5 7

6 25

SngeDy

Year acre

feet

4 26

6 2

52

7 94

54

Multiple Dry ear s

Year

4 26

6 2

52

7 94

54

Year 2 Year 3

6 78 6 55

4 26 4 26

2 57 3 62

7 62 8 3

75 95


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CITRUS RANCH WATERSUPPLY ASSESSMENT AND VERIFICATIONSupply ReliabilityOctober 7 8

In additionIWA has included an Urban Water ShortageContingencyAnalysis in heir UWMPthatsets up a plan if there is a shortage of water or if the groundwater quality is unexpectedlydegraded Thereare four stages of action Normal ConditionWater Alert Water Warning andWaterEmergency with associatedmeasures to be taken in case of a water shortageSome ofthe contingency measures include restrictionsontimes of day for watering landscapingrequirements for recycling water at car washes and requiring restaurants to serve water tocustomersonly on requeot andcan be as restrictive as prohibiting fihlingswimming pools and a

moratorium on ssuing new construction metersThese

demand reductionmeasures are takeninto account in the projected suppliesduring single and multiple dry years see Table 5

5 WATERSHORTAGE CONTINGENCY

The 2 6 IWA UWMP details a water shortagecontingency plan that wil be implemented byIWA before the end of 2 6 It ncludes severalstages of acti have detailedmeasures to

be taken in the event of a water shortage including restrictions on the ime of day that residents

can water their lawns requirements for commercial car washes to recycle their water andrestrictionson frequency of Iawn watering andcan beas strict as prohibition of filling swimmingpools or completeprohibition of lawn watering in the Water Emergency stage These stages ofaction and their corresponding measures can be found in the WA UWMP August 2 6

53 EDUCTION OF WATER SUPPLY

There willnot be a reduction of water supply to user due to his P act

5 MPACTS TO OTHER PROJECTS

The IWA UWMPconfirms thatthis Project is within the scope and range of IWA Ths Project


29/75

Stantec


Water Supply VerificationOctober 7 6

6 Water Supply Verification

This documentverifies the water supply for the P ject as required by California GovernmentCode 6647 3

7The IWA UWMP dated August2 6 includes the P ct in he calculations of projecteddemand on theIWAsystem The UWMPshows that WA has planned for and has the capacityfor the Project

Section 5 ocuments supply sufficiency during normal single dry and multiple dry yearswithin a 2 ear projection

All present and futurewater supplies are documented in Section 4 Previous water usesdocumented in Section 3


30/75

Stant

CITRUS RANCH WATERSUPPLY ASSESSMENT AND VERIFICATIONConclusion

October 7 6

7 Conclusion

Based on the nformation and findings documented in thsWSA and WSV there is substantial

evidence to support a determination that there will be sufficient water supplies to meet thedemands o the P jeot In addition the WSA demonstrates that there will be sufficient watersupplies to meet the p jected water demands of existing uses the P ject and other futureuses during normal snge ea nd multiple dry years throughout the twenty year planninghorizon providedunder 8B8 O and 22


31/75

Stantec


List of PreparersOctober 7 6

8 List of Preparers

Dan Ruiz Managing Principal P

Doug Franklin Managing Principal P

Michael Peron Managing Principal

Katherine Walters Project Planner

Erik Lainas Project Planner

Renee Schrader Project Planner


32/75

Appendix ACtrus Ranch Potable Water Demands


33/75

CITRUS RANCH ESTIMATED WATER DEMANDS

D USE11

ERAL PLAN LAN

r,w3 6

5.4

TION

DEMAND 1 HOUR

f-LiM,282 gpcd

282 gpcd

2289 3,-1

Area (HL) Residential L ow '13.6 per/acre 14.4 21.6 43.1Area 2 (RL) Residential Low 5.0 *13.6 per/acre 282 gpcd 13.3 20.0 40.0Area 3 (RL) Residential Low 5.9 *13.6 per/acre 282 gpcd 15.7 23.6 47.1Area 4 (RM) Residential Medium 13.6 *23.8 per/acre 282 gpcd 63.4 95.1 190.2Area 5 (RM) Residential Medium 18.3 *23.8 per/acre 282 gpcd 85.3 127.9 255.9Area 6 (RL) Residential Low 11.6 *13.6 per/acre 282 gpcd 30.9 46.3 92.7Area 7 R esidential Medium 25.5 *23.8 per/acre 282 gpcd 118.9 178.3 356.6Area 8 (RL) Residential Low 10.1 *13.6 per/acre 282 gpcd 26.9 40.3 80.7Area 9A (RM) Residential Medium 9.9 *23.8 per/acre 282 gpcd 46.1 69.2 138.4Area 9B (RH) Residential High 9.9 **35 per/acre 282 gpcd 67.9 101.8 203.6Area 10 (RH) Residential High 16.2 5 per/acre 282 gpcd 111.0 166.6 333.1

Area 11 (RH) Residential High 9.3 **35 per/acre 282 gpcd 63.7 95.6 191.2Area 12 (RH) Residential High 18.9 **35 per/acre 282 gpcd 129.5 194.3 388.6Area 13 (RM) Residential Medium 29.4 *23.8 per/acre 282 gpcd 137.0 205.5 411.1

Area 14 (RL) Residential Low 14.8 *13.6 per/acre 282 gpcd 39.4 59.1 118. 3Area 15 R esidential Medium 27.4 *23.8 per/acre 282 gpcd 127.7 191.6 383. 1Area 16 (RL) Residential Low 14.3 *13.6 per/acre 282 gpcd 38.1 57.1 114.3Area 17 (RL) Residential Low 34.5 *13.6 per/acre 282 gpcd 91.9 137.8 275.7

Area 18 (RL) Residential Low 18.7 *13.6 per/acre 282 gpcd 49.8 74.7 149.4Area 19 (RL) Residential Low 24.8 *13.6 per/acre 282 gpcd 66 1 99.1 98.2Area 20 (RL) Residential Low 25.1 *13.6 per/acre 282 gpcd 66.8 100.3 200.5Area 21 (RL) Residential Low 20.0 *13.6 per/acre 282 gpcd 53.3 79.9 159.8Area 22 (RL) Residential Low 27.7 *13.6 per/acre 282 gpcd 73.8 110.7 221.3

Area 23 (RL) Residential Low 38.1 *13.6 per/acre 282 gpcd 101.5 152.2 304.4

Area 24 (RM) Residential Medium 43.6 *23.8 per/acre 282 gpcd 203.2 304.8 609.6Area 25 (RL) Residential Low 19.3 *13.6 per/acre 282 gpcd 51.4 77,1 154.2Area 26 (RM) Residential Medium 34.7 *23.8 per/acre 282 gpcd 161.7 242.6 485.2Area 27 (RM) Residential Medium 31.2 *23.8 per/acre 282 gpcd 145.4 218.1 436.3Area 28 (RM) Residential Medium 20.4 *23.8 per/acre 282 gpcd 95.1 142.6 285.2

Co. mrniirlif ;_i;nui ,. . : -Bc e

1t4 282 gpcd 126 188 377

(CC) r.mt.n . y Commercial 5.4 *56.25 per/acre 282 gpcd 59.5 89.2 178.5Clubhouse (CC) Gomminity Commercial 6.0 *56.25 per/acre 282 gpcd 66 1 99.1 198.3

ew

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34/75

Open Space 519.6 282 gpcd 37.9 56.9 113.7Comm unity Center (OS) Open Space 5.0 *0.20 per/acre 282 gpcd 0.20 0.29 0.59Wilderness Trail andUndisturbed Open Space (OS) Open Space 187.4

*0.20 per/acre 282 gpcd 7.3 11.0 22.0

Community Parks (OS) Open Space 6.1 *0.20 per/acre282 gpcd 0.24 0.36 0.72

Neighborhood Parks (OS) Open Space 8 *0.20 per/acre 282 gpcd 0.31 0.47 0.94Citrus Grove Paseos (OS) Open Space 11.3 *0.20 per/acre 282 gpcd 0.44 0.66 1.3Recreation OS &Playtields (OS) Open Space 56.2

*0.20 per/acre 282 gpcd 2,2 3.3 6.6

Dillon R oad La ndscape (OS) Open Space 7.2 *0.20 per/acre 282 gpcd 0.28 0.42 0.85Golf Course (OS) Open Space 229.1 *0.20 per/acre 282 gpcd 9.0 13.5 26.9Golf Course Maintenance

Yard (OS) Open Space 1.6 *5625 per/acre 282 gpcd17.6 26.4 52.9

SE Drainage Channel (OS) Open Space 7.7 *0.20 per/acre 282 gpcd 0.30 0.45 0.90Streets 63.9Community Collector Streets Streets 60.0 N/A N/A N/A N/A N/ADillon Roa d R.O.W Streets 3 9 N/A N/A N/A N/A N/A

Public Feelfides 5.0 282 gpcd 22.0 33.0 66.1Fire Station (P) Public Facilities 2.0 *56.25 per/acre 282 gpcd 22.0 33.0 66.1Well Site (P) Public Facilities 3.0 N/A N/A N/A N/A N/A

TOTAL

Notes: gpcd = gallons capita pergpm = gallons per minuteMGD = million gallons perper/acre = individuals per

Density Factor is based on Table** Density Factor obtained from

day

dayacre

4-3 of the Indio Water Authoritythe City of Indio Community Development

1,183.5

Management Plan.(Steve Walkerepartment - 1-19-06)

2,475 gpm3.56 MGD

3,712 gpm ,424 gpm5.35 MGD 0.69 MGD

Urban Water


35/75

PROJECTED WATER DEMAND PROJECTIONS FOR THE CITRUS RANCH PROJECT

LAND USE

ResidentialCommunityCommercialOpen SpaceStreetsPublic Facilities

TOTAL

WATER DEMAND (GPM)

2010 (75 COMPLETE) 2015 (100 COMPLETE) 2020 (100 COMPLETE)AVERAGE1,717

95

28N/A221,862 gpm2.68 MOD

MAX2,576

141

43N/A33

2,793 gpm4.02 MOD

PEAK5,151

283

85N/A66.1

5,585 gpm8.04 MGD ;;

AVERAGE2,289

126

37.9N/A222,475 gpm3.56 MGD

MAX3,434

188

56.9N/A33

3,712 gpm5.35 MGD

PEAK6,868

377

113.7N/A66.1

7,425 gpm10.69 MGD

AVERAGE2,289

126

37.9N/A22

2,475 gpm3.56 MGD

MAX3,434

188

56.9N/A33

3,712 gpm5.35 MGD

PEAK6,868

377

113.7N/A66.1

7,425 gpm10_69 MOD

LAND USE

CITRUS RANCH

GENERAL PLAN LAND USEDESIGNATION

ESTIMATED

ACREAGE

140.7

WATER DEMANDS

DENSITYFACTOR

(PHASE

DEMANDFACTOR

282 gpcd

I)

AVERAGE MAX-DAY

986.3

f3 Ale HO Ft

1972.6en al 657.5

Area 1 (RL) Residential Low 5.4 *13.6 per/acre 282 gpcd 14.4 21.6 43.1Area 2 (RL) Residential Low 5.0 13.6 per/acre 282 gpcd 13.3 20.0 40.0Area 3 (RL) Residential Low 5.9 *13.6 per/acre 282 gpcd 15.7 23.6 47.1Area 4 (RM) Residential Medium 13.6 *23.8 per/acre 282 gpcd 63.4 95.1 190.2

Area 5 (RM) Residential Medium 18.3 *23.8 per/acre 282 gpcd 85.3 127.9 255.9Area 6 (RL) Residential Low 11.6 13.6 per/acre 282 gpcd 30.9 46.3 92.7Area 7 (RM) Residential Medium 25.5 *23.8 per/acre 282 gpcd 118.9 178.3 356.6Area 8 (RL) Residential Low 10.1 *13.6 per/acre 282 gpcd 26.9 40.3 80.7Area 9A (RM) Residential Medium 9.9 *23.8 per/acre 282 gpcd 46.1 69.2 138 4Area 9B (RH) Residential High 9.9 **35 per/acre 282 gpcd 67.9 101.8 203.6Area 10 (RH) Residential High 16.2 **35 per/acre 282 gpcd 111.0 166.6 333.1Area 11 (RH) Residential High 9.3 **35 per/acre 282 gpcd 63.7 95.6 191.2

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Open Space 319.1 282 gpcd 12.5 18.7 37.5Community Center (OS) Open Space 5.0 *0.20 per/acre 282 gpcd 0.20 0.29 0.59Wildemess Trail andUndisturbed Open Space (OS) Open Space 187.4 *0.20 per/acre 282 gpcd 7.3 11.0 22.0

Community Parks (OS) Open Space 2.03*0.20 per/acre 282 gpcd 0.08 0.12 0.24

Neighborhood Parks (OS) Open Space 2.67 *0.20 per/acre 282 gpcd 0.10 0.16 0.31Citrus Grove Paseos (OS) Open Space 3.77 *0.20 per/acre 282 gpcd 0.15 0.22 0.44Dillon Roa d Landscape (OS Open Space 3.6 *0.20 per/acre 282 gpcd 0.14 0.21 0.42Golf Course

TOTAL

OS' 0en Space 114.6

459.8

*0.20 er/acre 282 4.5670 gpm

0.96 MOD

6.71,005 gpm1.45 MGD

13.52,010 gpm2.69 MGD

CITRUS RANCH ESTIMATED WATER DEMANDS (PHASE II)

LAND USEGENERAL PLAN LAND USE

DESIGNATION ACREAGEDENSITYFACTOR

DEMANDFACTOR AVERAGE MAX-DAY PEAK HOUR

Residential 207.9 282 gpcd 746 1120 2239Area 12 (RH) Residential High 18.9 **35 per/acre 282 gpcd 129.5 194.3 388.6Area 13 (RM) Residential Medium 29.4 *23.8 per/acre 282 gpcd 137.0 205.5 411.1Area 14 (RL) Residential Low 14.8 *13.6 per/acre 282 gpcd 39.4 59.1 118.3Area 15 (RM) Residential Medium 27.4 *23.8 per/acre 282 gpcd 127.7 191.6 383.1Area 16 (RL) Residential Low 14.3 *13.6 per/acre 282 gpcd 38.1 57.1 114.3Area 17 (RL) Residential Low 34.5 *13.6 per/acre 282 gpcd 91.9 137.8 275.7Area 18 (RL) Residential Low 18.7 *13.6 per/acre 282 gpcd 49.8 74.7 149.4Area 19 (RL) Residential Low 24.8 *13.6 per/acre 282 gpcd 66.1 99.1 198.2Area 20 (RL) Residential Low 25.1 *13.6 per/acre 282 gpcd 66.8 100.3 200.5

Community Commetcial 11.4 282 gpcd 125.6 188.3 376.8Boutique Hotel (CC) Comm unity Com mercial 5.4 *56.25 per/acre 282 gpcd 59.5 89.2 178.5

Clubhouse (CC) Comm unity Com mercial 6.0 *56.25 per/acre282 gpcd 66.1 99.1 198.3

Open Space 128.3 22.6 33.8 67.8Community Parks (OS) Open Space 2.03 *0.20 per/acre 282 gpcd 0.08 0.12 0.24Neighborhood Parks (OS) Open Space 2.67 *0.20 per/acre 282 gpcd 0.10 0.16 0.31Citrus Grove Pa seos (OS) Open Space 3.77 *0.20 per/acre 282 gpcd 0.15 0.22 0.44Dillon Ro ad Landscape (OS) Open Space 3.6 *0.20 per/acre 282 gpcd 0.14 0.21 0.42Golf Course (OS) Open Space 114.6 *0.20 per/acre 282 gpcd 4.5 6.7 13.5Golf Course Maintenance (OS) Open Space 1.6 *56.25 per/acre 282 gpcd 17.6 26.4 52.9

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37/75

Public Facilities

f P) Public Fa cilit282 gpcd 22.0282 2.0

66.13.0

CITRUS RANCH ESTIMATED WATER DEMANDS (PHASE III)

I,,gGENERAL PLAN LAND USE

235

DENSITY DEMAND-

CTOO282 gpcd

A E

885 1328

c

Residential 2656

Area 21 (RL) Residential Low 20.0 *13.6 per/acre 282 qpcd 53.3 79.9 159.8Area 22 (Ri .) Residential Low 27.7 *13.6 per/acre 282 gpcd 73.8 110.7 221.3Area 23 (RL) Residential Low 38.1 *13.6 per/acre 282 gpcd 101.5 152.2 304.4Area 24 (RM) Residential Medium 43.6 *23.8 per/acre 282 gpcd 203.2 304.8 609.6

Area 25(RL) Residential Low 19.3 *13.6 per/acre 282 gpcd 51.4 77.1 154.2

Area 26 (RM) Residential Medium 34.7 *23.8 per/acre 282 gpcd 161.7 242.6 485.2Area 27 (RM) Residential Medium 31.2 *23.8 per/acre 282 gpcd 145.4 218.1 436.3Area 28 (RM) Residential Medium 20.4 *23.8 per/acre 282 gpcd 95.1 142.6 285.2

Open Space 64.7 2.53 3.8 7.59

Community Parks (OS) Open Space 2.03 *0.20 per/acre 282 gpcd 0.08 0.12 0.24Neighborhood Parks (OS) Open Space 2.67 *0.20 per/acre 282 gpcd 0.10 0.16 0.31

Citrus Grove Paseos (OS) Open Space 3.77 *0.20 per/acre 282 gpcd 0.15 0.22 0.44Recreation OS &Payfields

(OS) Open Space 56.2 *0.20 per/acre 282 gpcd 2.2 3.3 6.6

Public Facilities 3.0 282 gpcd

Well Site (P) Pt blic Facilities 3.0 N/A N/A N/A N/A N/A

OTAL 302.7 888 gpm1.28 MGD 1,332 gpm1.92 MGD 2,664 gpm3.84 MGD

LC

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38/75

Appendix BTable 3 2 and 3 3 rom

Coachella Valley Water District

Urban Water Management PlanDecember 2 5


39/75

Section 3 - Water Supplies

Table 3-2Historical and Future Groundwater Production by Subbasin for All Producers

YearUpper Whitewater

River 1 , 2(acre-ft/yr)

Lower WhitewaterRiver 2

[acre-ft/yr)

Mission Creek 3(acre-ft/yr)

Total(acre-ft/yr)

1995 176,298 169,400 10,102 355,8001996 182,626 166,000 10,562 359,1881997 180,936 165,600 9,899 356,4351998 184,779 165,500 10,291 360,5701999 201,368 168,300 10,974 380,6422000 206,166 166,500 11,838 384,5042001 203,716 166,300 12,350 382,3662002 208,898 166,700 13,968 389,5662003 199,278 199,800 4 13,768 412,8462004 207,605 172,300 16,697 396,6022005 209,908 156,752 17,363 384,0232010 197,737 145,663 21,820 365,2202015 188,394 140,129 26,245 354,7682020 203,279 149,019 29,352 381,650

2025 218,712 137,700 32,005 388,4172030 234,173 121,937 34,189 390,299Data from Engineer's Reports for Upper WhitewaterRiver Subbasin Area of Benefit (CVWD.2005d)Data from CVWMP back-up files (CVWD, 2002a).Data from Engineer's Reports for M ssion Creek Subbasin Area o f Benefit (CVWD. 2005c). Projected values estimatedbased on SCAG growth forecasts.Groundw ater production temporarily increased due to a reduction inCoachella Canal water deliveries during 2003.

Table 3-3

Histor ical and Future CVW D Gro undw ater P roduct ion by Subbasin

YearUpper Whitewater

River 1(acre-ft/yr)

Lower WhitewaterRiver'

(acre-ft/yr)

Mission Creek( acre-ft/yr)

Totalacre-ft/yr)

H ist or ica la n d F u tu re C

S e c t io n 3

T a b le 3 3

D G ro u nd w at er Pr od u ct io n b y S u b b asi n

a te rS u p p lie s

T a b le 3 2

H is to ric a la n d F u tu re G ro u n d w at e r P ro d u ct io n b y S u b b a s in for ll P rod uc e rs

Y e a r

9 95

99 6

9 9 7 9 98

99 9

2 2

2 2

2 3

2 4

2 5

22 5

2 2

2 2 5

2 3

U p p e rW h ite w a te rR iv e r

a c r e f t r 7 69 8

8 22 6

8 3 6

8 47 9

2 6 8

2 66 62 3 7 6

2 89 8 9 97 8

2 7 5

2 9 8

9 73 7

8 89 4

Lo w e rW h ite w a te r

R ive r

a c r e t

6 9

6 6

6 5

6 5

6 8

6 6

6 6

6 6

9 9 4

7 2

5 65 2

4 56 3

4 2 9

2 3 47 3 2 3 7

M s s io nC re ek3

a c r e tT ot a l

a c r e f t r

2 6 2

9 9

9 7 4

38

25 36 8

36 8

69 7

76 32 2

2 64 52 95 2

3 2 5

3 48 9

3 5 5

3 5 98 83 5 63 5

3 6 7

3 8 4 2

3 8 4 43 8 26 6

3 8 96 6

4 24 6

3 9 6 2

3 8 42 3

3 6 52

3 5 46 8

2 37 9

2 8 2

4 9 9

3 7

3 8 5

3 8 8 7

3 9 9 9 Da tafromEngin eer ep orts forUp pe rWh ite w ate rRiverSu bba sinAreaof en efit VW 5d2 Da taf r om CV W M P ba c ku p ile s C V W D 2 2 a3 Da tafrom Engin eer eportsfor Miss ionCreekSubbasinAreaof Benefit V W 2 5 c Pro jec ted valuese s tim ate d

b a se d on SC AG gr o wt h fo rec a s ts4 Groun dwaterpro du c tio nte mp ora rilyinc rea seddu et o a reductionin Coac hellaCa na lwa terdeliver iesduring 3

U p p e rW h ite w a te r Lo w e rW h it e w a te rR iv e r R iv e r

ac r e f t a cr e f t

M s si o n Cr ee k

a c re f t r

To tal

a c r e f t r


40/75

TO Honorable President and Members of the IndioWater Authority

FROM Glenn D Southard Executive Director

DATE November 3 2 6

SUBJECT Water Supply Assessment Water Verification LetterJackson Retail Center Regency Development

SUMMARY

INDIO WATER AUTHORITY

AGENDA REPORT

A Water SupplyAssessment has been completed for he Jackson Retail Center RegencyDevelopment Project in accordance with State lawper Senate Bill 6

STAFF RECOMMENDATION

Approvethe Water

SupplyAssessment for

the Jackson Retail Center RegencyDevelopment

ANALYSIS


41/75

IWA Agenda ReportDecember 6 6WaterSupply Assessment Jackson Retail Center

Page 2

Coachella ValleyAquifer and more specificallydetermine if the aquifer is dequate tosupply the Jackson Retail Center Regency Development Project Theprojectconsists of a56 cre commercial development with plans for several majorretail stores in ddition tosmaller shops ful ervice and fast food restaurants and banks

The Water Supply Assessment for the Jackson Retail Center Regency DevelopmentProject found that there are sufficient water supplies to meet the demands of the projectThe aquifer has sufficient capacity to supply the water demands for his development Theproject applicant will work with staff to implement the required water facilities to meet the

domestic and fire low demands of the project

FINANCIALREVIEW

None

PUBLIC NOTICE

This item has been noticedthrough the regularagenda notification process Copies of thedraft report will be made available at theCty Hall public counter and the Indio PublicLibrary

Submitted by Prepared by

L Smth P

rector of Engineeringubi c orks GryLewis

General Services Manager


42/75

A T T A C H M E N TA

Jackson Ret a ne RegencyDevelopment


43/75

JACKSONRETAILCENTER WATER SUPPLY ASSESSMENT

Executive Summary

The Jackson Retail Center Center is a roposed 56 cre commercialdevelopment withplans for several major retail stores in ddition to smaller shops full service restaurants fastfoodrestaurants and banks see Table or a detailed description A ome Depot store isalready approved and is eginningconstruction at the site but was included in ths evaluationforan assessment of he impact of he entire Center Itis located just north of Interstate inthe Cty of Indio along Jackson Street in the Lower California desert The IndioWater Authoritywill provide domestic water to the project See Figures and 2 or an llustration of he sitelocation and characteristics

This Center is ubject to a Water Supply Assessment Senate Bll 6 Ths document

examines the current condition of the Coachella Valley Aquifer Aquifer and finds the Aquiferadequate to supply the Project in accordance with Califomia Water Code Section 9 et seq

Table ummary ofCommercial

Uses in JacksonRetail Center

Commercial Type

HomeDepotMajor 2

Major 3Ma

Major 6Major 7Mj 8

Squtte FeetX4 92

5 9

87

93 962 9

564


44/75

of

IndianWells

y of

ProjectSite


45/75

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46/75

Stantec

JACKSON RETAIL CENTER WATERSUPPLY ASSESSMENTIntroduction

October 25 6

2 ntroduction

2 BACKGROUND

The JacksonRetail Center includesthe developmentof approximately56 craa includingexisting and proposed commercial buildings totaling 628 3 square feet

parkingand

associa tedlandscaping Sincethis Center is subject to the California EnvironmentalQuality ActCEQA process and is a Projecr as definedby the CaliforniaWaterCodeSect ion 9 2 theIndio Water Authority IWA he PublicWater System PWSfor the Center has determinedthat a Water Supply Assessment WSA s necessary to complete the CE process

2 PURPOSE OF DOCUMENT

Upon request of ocal government a PWS is equired by aw to provide documentationregarding the water supply for new Ths information is ncluded in the CEQAdocumentation and it becomesevidence used in the approvalprocess

2 Water Supply Assessment

Senate Bll 8 O SB8 O was enacted hn2 oonle effective inJmnuoryOO2 B8 Oamended Section 2 5 9 he Public Resources Code SB 8 aso amended Sections

63 656 9 9 2 and 9 5 repealed Section 3 and added andamended Section 57 of he Californa Water Code It requires cities and counties to requestspecificinformation on water supplies from the PWS that wouldserve any project thatiaaubiaotto CEQA and is defined as a Project in Water CodeSection 92 Thsinformation is to be


47/75

Stantec

JACKSON RETAIL CENTER WATERSUPPLY ASSESSMENTIntroduction

October 25 6

2 UBLIC WATER SUPPLY

2 eneral

Theproject ie ocated within the current boundaries of the Indio Water Authority IWA servicearea Thecommercial development is included in the p jected demands in the newly updatedUrban Water Management Plan UWMP August 2 6 The projecteddemands on the WAsystem were estimated using the City of Indio General Plan 2 2 Land Use Diagram On thsdiagram see Appendix A or a opy of thediagram the project site is lassified as acombination of Community Commercial and Business Park land uses Since the density factorand the demand factor for these uses are the same 56 5 ersonsce nd282 gallons percapita per day respectively the Center has been accounted for in the uture projecteddemands on the WA water system IWA UWMP August 2 6

IWA is he PWS for this location The IWA currently serves approximately 7 54 esidents andbusinesses in the City of Indio WA currently has a groundwaterproduction capacity of 5ace ee per year

25 XISTING WATER MANAGEMENT PLANS

The IndioWater Authority completed an Urban Water Management in August2 6 Ths

document was approved by the Board of the IWA comprised of City of Indio City Councilmembers along with several other City officialsThe UWMPincludes the Jackson Retail Centerdevelopment inits p jected water demand and supply


48/75

Stantec

JACKSON RETAIL CENTERWATERSUPPLY ASSESSMENTWater Demands

October 25 6

3 Water Demands

3 HISTORICAL AND PROJECTEDDEMANDS OF IWA CUSTOMERS

Basedon metered water consumptiondata IWA consumed an average of 2 7 cre feet peryear in 2 5 Table 3 hows historical and projectedmetered water consumption from the

IWA UWMP August 2 6 Table 3 2 shows the projected water d e m a n d son IWA bycategory These tables are based on land usesfrom the Indio General Plan Land Use Diagramand the Center is ncluded in these estimates

Table3 stor cal and ProjectedConsumption

MeteredWater ConsumptionAcre feet

Metered Water

Year

985

986

987

988

989

99

99

992

993

994

995

996 997

998

999

3

27238

2 6

48

247 2 4

272 3 34

4 4557

6 2 2 45 5 83 6 93

Source

2 UWMP2 UWMP2 UWMP2 UWMP

2 UWMP2 UWMP2 UWMP2 UWMP

2 UWMP

2 UWMP

2 UWMP

2 UWMP2 UWMP

2 UWMP

2 UWMP


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Water Demands

October 25 6

3 ROJECT DEMANDS

Thedemands for the project have been calculated based on the Cty of ndio criteria asestablished in her UWMP Based on hese consumption factors the Center will demandapproximately 6 8 gallons per minute or 9 illion gallons perday excluding fire flowrequirements as shown in Table 3

Land Use

Commercial

Dail Demand

TABLE 33 STIMATED PROJECT WATER SERVICE DEMANDS

Quantityac56

DensityFactor

ca ita ce56 5

Demand

Factor

gpcd282

AverageDemand

g pm6 8

9 GD

Max ayDemand

g m

PeakHour

Demand

m927

3 GD 854

2 7 GD

Density factor based on Table 6 f he August 2 6 Indio Water Authority Urban Water Management Plangpcd gallons per capita daygpm gallons per minuteMGD mllion gallons per day


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JACKSON RETAIL CENTERWATERSUPPLY ASSESSMENT


4 Water Supplies

The first substantive requirement of a SB8 O Water Supply Assessment WSA is the

identificationand descriptionof the existing water supply sources in the public water systemthatwill serve the project Water Code Section 9d equires a WSA to include an identificationof existing water supply eni t rnento water rights or water service contracts relevant to theidentified water supply forthe proposed project and a escription of the quantities of waterreceived in prior years bythe publicwater system

As the proposed project has been included in the UWMP of the proposed r upplierstheinformation contained herein is eferenced from hese documents as other supplyassessments of similar p ectm The City of Indio and CVVVDshare many of the water suppliestherefore a single discussion of each of the water supplies is described herein

Forplanning purposes the Coachella Valley can be divided intotwo areas the Upper Valleyand Lower Valley The UpperValley includes the cities of Palm Springs Cathedral CityRancho Mirage Palm Desert Indian Wells and Desert Hot Springs and the unincorporatedcommunities o housand Palms Garnet North Palm Springs and Whtewater Thesecommunties include major resort destinations major residential developments and

approximately 8 olf courses The LowerValley includes the cities of La Quinta IndioCoachella and the unincorporated communities of Thermal Bermuda Dunes and Mecca

Farming activities are arge in he Lower Valley in 999 there were about 72 rrigatedacres of armland The LowerValley alsohas fish arms and greenhouses that thrive on hewarm groundwater in geothermal areas


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The Cty of Indio and the CVWDshare a ommongroundwatersource with the Desert WaterAgency DWA he City of Coachella and the Myoma Dunes Mutual Water Company CVWDmanages the Coachella Valley Basin The Coachella Valley s roundwater basin can bedescribed as a giant bathtub full of sand with the high end at the northwest edge of the valleynear Whtewater and the low end at he Salton Sea In the Lower Valley several imperviousclaylayers lie between the groundsurface and the main groundwater aquifer Water applied tothe surface in he LowerValley does not easilyreach the lower groundwateraquifers due to theimpervious clay layers

However CVWDs oachella Valley Final Water Management Plan2 2 determined that this sub asn tilldoeshave significantartificialrecharge capabilitiesdespitethese l ess han dea eologic characterist icsof the layers overlying the aquifer

Groundwater is umped from underground aquifers that are estimated store roughly 3million ace ee of water much of which originates from runoff Table4 hows historical groundwater use in 936 and 99 By 99 groundwater use in he

Coachel laValley had increased by morethan four times the use in 936 Groundwater supplied

about 56 percent of thetotal 999 demand 93 percent in he UpperValley and 38 percent intheLower Valley In 3 groundwatersupplied nearly 96 percent of the otal demand Totalgroundwater use in the entire Coachell Valley in 996 was about 35 O acre ee er yearGroundwater use throughout the Coachella Valleyhas increased steadil to present use evelsof approximately 375 ace ee per year Indio Water uthorib withdrew 2O ce ee

from its groundwatersources in 5 less han 3 ercent of the otal overall draw from heCoachella Valley Groundwater Basin The hstorical 995 and future through 2 3groundwaterproduction by sub asn or all producers can be found in the CVWD Urban Water

Management PIan 2 5 and is attached in Appendix B

Table 4

S f Hi i l C h ll V ll W S li


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Authority Urban Water Management Plan, August 2006). Several of the new reservoirs arebeing sited and designed for start of construction around the end of 2006.

4.1.2 Canal Water

The Coachella Canal is a branch of the All-American Canal that brings the Colorado River waterinto the Imperial and Coachella Valleys. The service area for canal water delivery under theCVVVD's contract with the U.S. Bureau of Reclamation is defined as Improvement District No. 1

(ID-1). CVWD has an undefined share of the 3.85 million acre-feet allocated to the Californiaagricultural agencies under Priority 3a. This source of water is considered highly reliable.Water from the Coachella Canal provides a significant water supply source for the Lower Valley,including IWA. In 1999, Coachella Canal Water accounted for over 60 percent of the watersupply to the Lower Valley, but less than one percent of the water supply to the Upper Valley(See Table 4-1). Most of this use is for crop irrigation in the Lower Valley. A copy of thecontract with the U.S. Bureau of Reclamation is available for review at the CVWD administrativeoffices located at 85-955 Avenue 52 in Coachella (760-398-2651).

In October 1999, CVWD, ID-1, and MWD reached agreement on the "key terms" that will benecessary elements in a formal Quantification Settlement Agreement (QSA) regarding a divisionand quantification of their respective shares of Colorado River water. The three agencies'Boards approved this QSA in October 2003. The intent of this agreement is to quantify therights of each agency and allow the transfer of water between willing buyers and sellers. Detailsof the QSA are discussed under projected supply below.

A lawsuit challenging the approval of the QSA on the grounds arising under the CaliforniaEnvironmental Quality Act (CEQA) is pending. However, it is not anticipated that a court rulingof noncompliance with CEQA would significantly affect the quantity and diversity of CVWD's

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JAC K SO N R ETA IL C E NTE R W ATE R S U PPL Y A SSES SME N TWa te rSup pliesOct obe r 2 5 6

Au tho rity Urb a n Wa ter M an ag em en tP n u g ust 2 8 S ev era lo th ene w ese rv oir s are

bein g si ted and d e sign e d fo r star t of co n struc tion a roun d the e n d of 2 6

4 ana l W ater

T h e Co ache lla C an al is a bra n ch of the A Imer ican Ca na lth at b ring s the C olora do Riv e rw a terinto th e m per ial a n d Coa c hella Va lle ys T he se rvi ce are a fo r c ana lwate r de livery u n der the

C V W D

o ntract with th e U u reau o f Rec lamationis defin e d as Im pr o ve me nt Di s trict N o C V WD h a s a n unde fined sha re of th e 3 5 milli o n a cr ee e lloc a ted to the Calif o rniaagr ic ultur a lage n cies un de r Pr io rity 3 a Th is sou rce o f wat e ris onsi d ered hig h ly reli ab le

Wate rfrom th e Coachella a na lprovidesa significantwate rsupplysource fo rthe Lower Va lle yinc lu ding IWA In 9 99 C oa ch ell a C ana lW at e r acco unted fo r o ver per ce nt o f the wa te rsupplyto the Lo w er Va lley b ut les sth an one percen to f the w ater s upplyto the Up p er Va lleyS e e T a ble o st o f thi s u se is or cro p irriga tion in h e Lowe rVa lle y A c opy o h eco n trac twit h t he US u re au o f R ec lam a tion is avail a ble fo r rev iew at the CV WD a d min is trat ive

o ffices locate d o 8 55 5 ven ue 5 2 in Co ache lla7 G O8 865

In

ne ce ss aryeleme nts in a fo rmal Qua ntification S ett lem en tAgre e men tQS A re g ar d in g a div is iona nd qu an tifi cat io n o h eir re spec tive sh a res o C o lora d o Riv er wa te r T he th ree a g enci e sBoa rd s app rove d th is Q S A in Oc tober 2 3 The int en tof th is a gr eem e nt is t o q ua nt ify therigh ts o feac hage ncya n d allo w th e tran s fer of wa te rbe tw ee nw illing b uye rs a nd selle rs D eta ils

of the Q SA ar e di sc uss ed u nd er proj e cted supp ly be lo w

A aws u itcha llengi n g th e of t he Q SA o n th e gro un ds ar isi ng un de r th e Cal ifo rniaEn vir on me nta lQ ua lity A c t isp e ndin g H owe ver it s not an ticipa te d that a cour t ru lin gof n onco m plia n ce w ith C EQA wou ld sig n ifica n tly affe c tthe q ua ntit ya n d di versit y of C VW D s


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Water Supplies

October 25 6

substantially except in areas where artificialrecharge has successfully raised water levels iat the VVhitevvmtmr Spreading Facility The Coachella Valley Water Master Plan pavailable at he Coachella office of CVWD definesactions the CVWD will take to reventcontinuing decline of groundwater levels and degradation of groundwater quality

To address groundwater concerns the CVWD has focused efforts on obtaining importedColorado Rver Wat er TheCoachellaBranch of the Al merican Canal was completedwiththe first deliveries of imported Colorado River water to area growers in 949 The impact ofimported water on the Coachella Valley was almost immediate By the early 98o aterlevels in the LowerValley had returned to their historical highs

Althoughgroundwater levels in he LowerValley had stabilized water levelscontinued to ecine In 963 the CVWD andDWA entered into contracts with the State of

Califomia for entitlements to State Water Project SWP water To avoid the estimated costof

constructing an aqueduct to bring SWP water directly to the Coachella Valley the CVWD andthe DWA entered into an agreement with the Metropolitan Water District of Southern CaliforniaMWD to exchange Colorado River water for SVVP water Starting in 973 the CVWD andDWA began exchanging their combined annual SVVP entitlement of 6 ace ee with MWDto recharge UpperValley groundwater supplies at the VVhitewater Spreading Facility whererecharge was known to be effective As of 999 more than 7 llion ace ee of Colorado

River water received in xchange for SWP waterhas been percolated into the CoachellaValley aquifer Copies of the CVVVDs WP entitlement with the State and the ExchangeAgreement with MWD are available for review at the CVWD administrative offices located at headdress in Coachella

In 984 CVWD and DWAentered into an advanced delivery agreement with MWD to percolateddition lC l d Ri s pplies in th U Basin d i g periods f s rpl s t availability


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In 98 CVWD and DWA ecognized the need for additional imported water in rder toeliminate groundwater overdraft In recent years the wo districts have been able to purchaseadditional SWPwater for recharge in the Upper VaIIey Inaddition both agencies have plannedto continue their efforts to obtain additionalpermanent water supplies as hey become availablein order to bolster the groundwaterrechargeprogram

4 GroundwaterDemand Management Measures

Since the Coachella Valley Groundwater Basin is not an adjudicated basin here are no deededrights to withdraw water As part of IWAs upport for the CVWD efforts to echarge theGroundwater Basin IWA pays a Water ReplenishmentAssessment to assist in paying for herecharge programs discussed above Theestimated assessment for fiscal year 2OO OO8orthe 2 active wels in IWAs ystem is 48 522 n addition to paying the Water

Replenishment Assessment CVWD dentified that water conse ti and source substitution

would also contribute to preserving the reliability of the Vyhtevvater Riverbasin to supplyexisting and future residents of the Coachella VaIIey

There are several other management nleosureo that both CoachellaVaIIey Water District andIndio Water Authority have established for the conservation of groundwater to revent anoverdraft condition in the Coachella Valley Since CVWD manages the entire Coachella Valleybomin ther demand managementmeasures wil have an effect on the amount of groundwateravailable to WA

4 CVWD Manage aunea

Groundwater has historically provided most of water required for golf in the Upperrequna rgo cou ses n e pper


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with CVWD to implement valley-wide conservation programs (see Section 8 ; Water DemandManagement Measures, of the IWA UWMP, August 2006).

4.2.3 Existing Surface Water

Surface water supplies come from several local rivers and streams, including the WhitewaterRiver, Snow Creek, Falls Creek, and Chino Creek. Table 4-1 shows historical surface wateruse in 1936 and 1999. In 1999, surface water supplied approximately three percent of the water

supply to the Upper Valley to meet municipal demand Because surface water is affected byvariations in annual precipitation, the annual supply is highly variable. Since 1936, theestimated historical surface water supply has ranged from roughly 4,000 to 9,000 acre-feet peryear. This supply has historically not been available to IWA for use in their system.

4.2.4 Canal Water

The CVWMP (2002) includes plans to expand the delivery of canal water to those agricultural

farmers that currently do not have access to the canal water for irrigation of their fields. Someof the current agricultural customers of IWA are included in this planned expansion, which willeffectively reduce the demand on IWA's delivery system and the demand on the groundwater inthe Lower Valley.

4.2.5 Recycled Water

Wastewater that has been highly treated and disinfected can be reused for landscape irrigation

and other purposes. It is not suitable for use as potable water. Recycled municipal wastewaterhas historically been used for irrigation of golf courses and other municipal landscaping in theUpper Valley area. Table 4-1 shows recycled water use in 1999 for the Upper Valley. Recycled

S ta ntec

J ACK S ON RE TAIL CE NT ER W A TER SUP P LY AS S ESS M ENTW ater Su pp lies

Oc tob er 25 6

wit h CVW D t o m pl em en tv a l eyde on s erva tion p rog ra ms s e e Se c tion 8 W a ter D em an dMa n agem ent M ea sur es o f the IW A U W M P Au gu st 2 6

4 E xis tin gS ur fac e W a ter

S ur fac e w a ter suppl ies co m e fro m se vera lloca lriv ers and stre a ms in clu din g the VVhitevvnterR iverS now Cre e k Fal ls C re eka n d Ch ino C r eek Ta b le 4 ho ws hi storic al s ur fac e w a ter

us e in 9 3 8 an d 9 9 I n 9 su rfa ce wa te rs u pplie da ppro ximate lythre e p erce n t o f th e w a ters u pply t o t he Upp erVa lley t o mee t mu n icip ald ema n d e ca u s e surf a ce w at er is a ffe cte d b yva r iation s in ann ual pr ec ipi ta tion t he a nn u al s up pl yis hig hly va ria ble Sin c e 9 3 8 th e

e st i m a te d histo ricals urfac e w at er su p ply h a s ran ged from ro ughly 4 t o 9 c r eee perye ar Th is su p ply ha s h is tori ca llyno t be en ava ila ble to IW Afor us e in th eir sy stem

4 a n al Wa ter

TheCVWMP2 2 ncludes plans to expand th e delivery o fcana lwat er to thos eagriculturalfarmers th at cu rrentl y do n ot hav e a cc e ss to the ca na lw at er for inrigationof the irfie lds So m eof t he cur re nt a gricu ltura lc u stom e rs o fIV V are in clud e d in h is pla nned o n w h ich wi lleffe ct ive lyre du ce the d eman d on Va elive rysys tem a nd th e dem and o n the g roun d wat e r inthe L owe r Valle y

4 R e cycl e dW a ter

W astewatertha t has bee nhighlytrea teda n d disinfected ca n be re us edfor landsca pe irrigationand o the r p ur po ses It i s ot s uitab le r se as pota b le wa te r Re c ycle d mun icipa lw ast ew ate rhas historica llybe e nus e d fo r irriga tion of g olf courses and oth e rmunic ipa llandscaping in th eUp pe rValIe ya re a Tab le 4 how s recy c led w ate ru se in 9 99 for th e Upp e rVa lley R e cycl ed


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contracting agencies CVWD and DWA are two of these agencies holding l ong erm atersupply contracts for SWP water CVWDs ntitlement to SVVPwater is 23 acre ee eryear while DWAs s 38 ace ee er year The combined entitlement for CVWD and DWAis 8 ace ee per year A copy of CVWDs WP entitlement is available for review at theCVWD administrative offices In addition the 2 2 CVWMPprovides more details of the SWPsupply and how it is utilized

CVWD and DWA do not directly receive SWP water Ther SWP water is elivered to MWD

pursuant to the aforementioned exchange agreement with MWD MWD in turn elivers anequal amount of Colorado Rver water to CVWD and DWA at the VVhitevvetar Rver

43 XISTING INFRASTRUCTURE

As mentioned above the WAUWMP dated August 2 details about the2 existingactive wells and their production rates in addition to the amount of storagecurrently available toIWA In addition they state that there are plans for additional wells and storage facilities thataredescribed more fully in a Water Master Plan that is currently being updated for 2 6 Thereport confirms that there is currently so additionaladditional capacity in heir existing infrastructure

Indio Water Authority has determined that the Center wi require approximately 22 illiongallons of reservoirstorage of the 7 million gallons planned for the IWA water system In heAugust 2 8 UWMPIWA shows that there are two reservoir facilities that are planned for hearea near the ackson Retal Center Plant No 9 6 illion gallons insize ocated near Avenue4 and Madison Street and the Pulte Development Plant No also 6 million gallons in sizelocated north of Plant No 9 on Madison Street The storagecapacity in hese two facilitieswillbe available to M4 in the future to providesufficient reservoir capacity for the project


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October 25, 2006

Water Transfers

CVWD relies on groundwater for its domestic water purposes and on its Colorado Riverentitlement for agricultural purposes. Surface water and recycled water from wastewatertreatment plants and fish farms are additional supply sources used to meet water demands inthe Coachella Valley. SWP water is used to replenish the groundwater supplies. Currently,there is sufficient groundwater storage to buffer the CVWD from water shortages. However, anyfuture alternate water supplies that CVWD can procure will decrease the dependence of their

system on groundwater, thereby allowing IWA, a system that is highly dependent ongroundwater, to rely on the Lower Valley basin as their main source of water.

During a typical drought, such as n the late 1980's and early 1990's, the CVWD releases itsSWP entitlement for use on the Coastal Plain. This release is done in accordance withgroundwater banking arrangements made with the MWD and the DWR. The stored water isreclaimed by DWA and CVWD, while MWD receives DWA's and CVWD's SWP supply.

In the CVWMP (2005), CVWD has estimated a water supply through 2030, well beyond the 20-year planning period required for a WSA. The proportion of water from each of the currentwater supply sources will change significantly by 2030 relative to current conditions. In 2030,roughly 19 percent of the demand will be supplied by groundwater, 65 percent with CanalWater, 4 percent by recycled water (including municipal wastewater, fish farm effluent, andirrigation drainage), 10 percent by SWP water, and 2 percent by desalinated drain water. Thesechanges reflect the District's efforts to reduce groundwater use and overdraft by augmentingother existing water supply sources and reducing demand of users. District sources that will beaugmented include the Colorado River water, SWP water, and recycled water. Table 4-2compares existing water supplies (2004) with projected water supplies in 2015 and 2030. Theestimation of supplies of groundwater is based on projections for the Whitewater and Mission

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JAC KSON RE T AIL C E NTE R WA T ER SU PP LY ASSE SSME NT

W ater Su pp lies

Oc tob er 25 6

W ate rT rans fe rs

C VVV D relie s on g rou nd wa te rfo r its d o mes tic w a ter p u rpo s es a n d o n it s C o lora d o Rv er

en title m en tfor a gr icu ltu ral purp o ses S urfa ce wate r an d recy cled w ater from wast e wate rtreat m ent p lan ts an d fish fa rm s a re ad ditio n al sup p ly so urc e s us e d to m eet w a ter d ema ndsinthe C oac h ella V alley S W P w at er is u sed t o rep len ish th e g round w ate r sup p lies C u rren tlyth ere is su fficien tg ro u nd wa te r sto ra ge to b uf fer th e CV W D fro m w a ter sh o rtag e s Ho wev er anyfut u re alte rn ate w ate rsup plies th at C VWD can p rocur e will decre ase th e de p ende n ce o f the irsyste m o n gno u ndvv o tar ther eb y al lowin g IWA a syst e m that is high ly dep e nde nt on

gr ou ndw a ter to rel y on th e Lo w er Va lley b a sin a s thei r mai n sour c e of w a ter

Du ring a ypic a ldr o ugh tsuc h as in th e a te 9 8o nd e a rly a th e C V WD rele a ses itsS W P e ntitle men t f or u se on the C oas tal P lain T his re lease i s one in ac c orda n ce wi th

g round wate rbank ing arr ang e me nt s ma d e with t he M VV Dan d The s t ored wate r is

re claimed b y D WA an d C VWD w hile MW Drece ives D WAs nd C V W D s W P s u pply

In the CVW MP 2 5 CV W Dha s esti m ated a wa te rs u pplyt h roug h 2 3 we llbeyo nd th e 2 year plan n ing p eriod re qui re d f o r a W SA Th ep rop o rtio n o fwa te rfro m ea ch of th e cu rr ent

w at er sup ply s o urce s will c han g e s ign ific an tly b y 2 3 rel at ive t o cu rre nt c on diti on s In 2 3

roug hly 9 p er ce nt o f the de m and w ill be su pp lie db y gr o undw ater 6 5 pe rc ent w ith Can a lWat e r4 e rc en tb y recy cl ed wa te rin clu di ng m u nic ipa lvv e tmv ve ter fis h far m eff luent andirri ga tion d rain a ge p erc en t by SWP wate r and 2 per ce nt b y d es alin at ed dra in wa t er T hesec han g es refl e ct th e Dis t ricts ffor ts to ed uce roundwa ter u sean d ove rd raf t by a ugm e ntin go ther e xist in g w ate rsup p lys o rc an dre du cin g der na nd of uae n x Dis trict so urce s that will b e

aug m en te d in clud e th e C o lora d Rive rw ate r S W P vv ater a nd re cy cle d wat e r T able 4

com pa res ex isting w ate rsup p lies 2 4 w ith p rojec ted w ate rs upplie s in 2 5 a nd 2 3 Thees tim atio n of s uppl ies of grou n dwa ter is b ased on p roject ions fo r the W hite w ate r an d M issio n


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throughout the Coachella Valley Thisalone will significantly add to the efforts to decrease thedemand and subsequent overdraft of the Coachella Valley Groundwater Basin

4 anal Water

As described earlierthe CVWD 3 nd MWD reached agreement on the key terms that willbe necessary elements in a formal QSA regarding a ivision and quantification o herrespective shares of he Colorado Rver water When aPIwater transfers havebeen completedCVWDwill have a total diversion of 459 acre ee per year at Imperial Dam as showninTabe 4 After deducting conveyance losses about 444 cre feet per year will beavailablefor use in the Valley by 2 33 and remaining at the level through 2 35 Of this amountabout 83 acre ee er year will replacegroundwaterpumping source substitution

TABLE 4

CVWD DELIVERIES UNDER THE QUANTIFICATIONSETTLEMENTAGREEMENT

ace ee er yearComponent

BaseAllotment

988 MWD D pproval Agneement

Coachella CanalLining to MWDTo Msce laneous nd PRs

ID

VVVD rst Transfer

ID

VVVD econd Transfer

Total Diversion at Imperial DamLess Conve iance Losses

TotalDeliveries to CVWD

Ace ee er year33

2

26 3

553

35

459 5

444


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The Cty of ndio proposes to implement policy by the and of 2 6 encouraging the useofrecycled water for golf courses residential landscaping and agriculture where oppnophate andothermajor rrigation areaswithn the Ctys ervice area In the 2 8 UWMP IWA shows the

projectedrecycled water supplybased on the population and a reasonable goal of recoveringand reusing 5 percent of the wastewater generated for rrigation and o roundwater rechargesee Table 4 his recycled waterwould provide for an estimated 5 to 2 percent of thetotal water demand by customers within the servicearea

2

Table 44 rojected Recycled Water Supply Indic Water Authority

Year

2 5

2

2 5

2 3

2 2

2 25

Population549 4673 8

89 94 4 52

9 8

3445

Wastewater

Indio Water Agenda December 6, 2006 Citrus Ranch.x PDF

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