Appendix N.1 - Water Supply Assessment (Adopted)Appendix N.1
Water Supply Assessment
The Altum Group, 2018
Travertine SPA
Draft EIR
SCH# 201811023
Technical Appendices
October 2023
Water Supply Assessment/Verification
For The
Travertine Specific Plan Project
Prepared for
Coachella Valley Water District
75525 Hovley Lane East
Palm Desert, CA 92211
760-398-2651
Prepared by
The Altum Group
73-710 Fred Waring Drive, Suite 219
Palm Desert, CA 92260
760-346-4750
— T h e
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February 2018
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TABLE OF CONTENTS
Executive Summary 1
1 Introduction 23
1.1 Project Description 23
1.2 Regulatory Requirements 26
1.3 Purpose of Document 27
1.3.1 Water Supply Assessment 27
1.3.2 Water Supply Verification 28
1.4 Water System and Supply 28
1.4,1 Water System 28
1.4,2 Water Supply 29
1.4,3 Historical Context 29
1.5 Existing Water Management Plans 30
1.5.1 2010 Coachella Valley Water Management Plan Update 30
1.5.2 CVWD 2015 Urban Water Management Plan, SBx7-7 and Water Shortage Contingency
Ordinance
1.5.3 Integrated Regional Water Management Plan
1.5.4 Sustainable Groundwater Management Act Alternative Plan
2 Water Demands and Conservation Measures
2.1 Water Demand Factors
2.2 Project Water Management Programs
2.3 Residential Water Demands
2.3.1 Community Park Clubhouse — Planning Area 8
2.4 Landscape Irrigation and Outdoor Water Demands
2.5 Summary of Project Water Demands
2.6 Project Specific Water Conservation Reduction Measures
3 Water Supply Assessment
3.1 General
3.2 Identification of Water Sources
3.2.1 Groundwater
3.4 Description of the Aquifer
3.2.2 Aquifer Adjudication
3.2.3 Status of the Aquifer
3.3 Overdraft Mitigation Efforts
3.3.1 Coachella Valley Water Management Plan Update
3.3.2 CVWD Landscape Ordinance
33
37
37
39
39
40
51
56
56
61
61
64
64
64
64
65
69
70
71
71
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3.3.3 Source Substitution 71
3.3.4 CVWD's Conservation Programs 73
3.4 Historical Groundwater Use 74
3.5 Groundwater Sufficiency Analysis 74
3.6 Additional Water Sources 74
3.6.1 Colorado River Water 75
3.6.2 State Water Project Water 77
3.6.3 Factors Potentially Impacting State Water Project Delivery Capability 80
3.6.4 Surface Water 80
3.6.5 Recycled Water 81
3.6.6 Desalinated Drain Water 81
3.6.7 Permanent Water Purchases 81
3.62 Summary of Primary and Additional Water Sources 82
3.7 Analysis of Water Supply and Demand 82
3.7.1 Effects of the 2008-2011 Recession 84
3.7.2 Groundwater and Groundwater Storage 86
3.7.3 Coachella Canal Water 87
3.7.4 Additional Table A Amounts 87
3.7.5 State Water Project Capability Report 87
3.7.6 Metropolitan Water District of Southern California (MWD) Callback 88
3.7.7 Long -Term Average State Water Project Deliveries 88
3.8 Summary 92
3.9 Conclusions 93
3,9.1 Coachella Valley Water District Service Area 93
3.9.2 Project Water Requirements 94
4 Water Supply Verification (WSV) 95
4.1 General 95
4.2 Water Source 95
4.3 Supporting Documentation 95
4.4 Factors of Capability 95
4.4.1 General 95
4.4.2 Historical Availability of Water Supply 95
4.4.3 Water Shortage Contingency 96
4.4.4 Reduction of Water Supply 97
4.4.5 State Water Project and Colorado River Water 97
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4.5 Impacts to Other Projects 97
4.6 Rights to Groundwater 98
4.7 Verification 98
5 References 99
List of Tables
Table 1 Land Use Statistical Summary 24
Table 2 Project Indoor Residential Water Demand 51
Table 3 Project Indoor Commercial Use Water Demand 55
Table 4 Project Outdoor Water Demands 59
Table 5 Summary of Water Demand Projections (AF/YR) 62
Table 6 Groundwater Storage Coachella Valley Groundwater Basin 67
Table 7 Total Estimated Project Demands West (Upper)
Whitewater/Indio Subbasin Annual Recharge Deliveries 69
Table 8 Annual CVWD Colorado River Diversions at Imperial Dam
(after measure returns) 76
Table 9 Colorado River Deliveries to CVWD under the
Quantification Settlement Agreement 77
Table 10 State Water Project Water Sources 78
Table 11 Department of Water Resources Table A Water Allocations 79
Table 12 Existing CVWD Water Sources and Supply Table A Amounts,
Water Rights and Water Service Contracts 82
Table 13 Projected Average Urban Water Supply (AFY) 85
Table 14 Normal Year Supply and Demand Comparison
(adapted from DWR Table 7-2 R and DWR Table 7-2 W) 90
Table 15 Normal Year Supply and Demand Comparison — Urban Supply Only 90
Table 16 Single Dry Year Supply and Demand Comparison
(adapted from DWR Table 7-3 R and DWR Table 7-3 W) 90
Table 17 Single Dry Year Supply and Demand Comparison — Urban Only 91
Table 18 Multiple Dry Years Supply and Demand Comparison
(adapted from DWR Table 7-4 R and DWR Table 7-4 W) 91
Table 19 Multiple Dry Years Supply and Demand Comparison — Urban Only 92
Table 20 Impact of Project Demand on Groundwater Supply 93
Table 21 Stages of Urban Water Shortage Contingency Plan (DWR Table 8-1 R) 96
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List of Exhibits
Exhibit 1 Regional Location 5
Exhibit 2 Project Site and Vicinity 7
Exhibit 3 Site Photos 9
Exhibit 4 Approved Travertine and Green Specific 13
Exhibit 5a Proposed Planning Areas — Plan A 15
Exhibit 5b Proposed Planning Areas — Plan B 17
Exhibit 6 CVWD Water District Service Area 19
Exhibit 7 CVWD Groundwater Subbasins 21
Exhibit 8 Status of the Overdraft — Annual Change in Storage 35
Exhibit 9 Landscape Structure Diagram 41
Exhibit 10 Plant Palette List 43
List of Appendices
APPENDIX A 2010 CVWMP Update Executive Summary
APPENDIX B Water Litigation and Other Actions
APPENDIX C Outdoor Water Calculations
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ACRONYMS AND ABBREVIATIONS
Acronyms and Abbreviations
AF Acre -Feet
ACBCI Agua Caliente Band of Cahuilla Indians
AFY Acre -Feet per Year
AWWARF American Water Works Association Research Foundation
CEQA California Environmental Quality Act
CFS Cubic Feet per Second
Ccf 100 Cubic Feet
CVP Coachella Valley Project
CVRWMG Coachella Valley Regional Water Management Plan
CVWD Coachella Valley Water District
CVWMP Coachella Valley Water Management Plan
DWA Desert Water Agency
DWR California Department of Water Resources
EAWA Estimated Annual Water Applied
ETAF Evapotranspiration Adjustment Factor
ETO Evapotranspiration
GCS Government Code Section
Gpcd Gallons per capita day
Gpd Gallons per day
GRF Groundwater Replenishment Facility
GSP Groundwater Sustainability Plan
HDR High Density Residential
ID -1 Improvement District No. 1
IID Imperial Irrigation District
IRWMP Integrated Regional Water Management Plan
MAF Million Acre -Feet
MAWA Maximum Allowable Water Allocation
MHDR Medium High Density Residential
MWELO Model Water Efficient Landscape Ordinance
MUA Mixed Use Areas
MU Mixed Use
MWD Metropolitan Water District of Southern California
NMFS National Marine Fisheries Service
OS -P Open Space Park OS -
R Open Space Reserve
PF Public Facility
PWS Public Water System
QSA Quantification Settlement Agreement
RCCDR Riverside County Center for Demographic Research
RCP Riverside County Population Projections— 2006 and 2010
SB Senate Bill
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ACRONYMS AND ABBREVIATIONS
SBx7-7 Senate Bill x7-7
SCE Southern California Edison
SCG Southern California Gas
SDCWA San Diego County Water Authority
SF Square Feet
SGMA Sustainable Groundwater Management Act
S0l Sphere of Influence
SWP State Water Project
SWPDCR State Water Project Delivery Capability Report
SWRCB State Water Resources Control Board
TEL Thomas E. Levy
USBR United State Bureau of Reclamation
USFWS United States Fish and Wildlife Service
UWMP Urban Water Management Plan
VSD Valley Sanitary District
WRP Water Reclamation Plant
WSA Water Supply Assessment
WSV Water Supply Verification
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EXECUTIVE SUMMARY
executive Summary
This Water Supply Assessment (WSA) and Water Supply Verification (WSV) are being prepared in
conjunction with the Environmental Impact Report (EIR) for the 887.5 acre Travertine Specific
Plan Project (Project) located in the southeastern portion of the City of La Quinta (City) (Exhibit
1, Regional Location). The WSA/WSV addresses the projected water demand and supply
conditions associated with full build -out of the Project. In addition to evaluating future water
demand for the Project, the WSA/WSV also evaluates the available existing and future water
resources that the local water purveyor, Coachella Valley Water District (CVWD), will utilize to
meet future demand for the Whitewater River Subbasin.
As shown in Exhibit 2, Project Site and Vicinity, the local area is characterized as "developing"
with a number of golf course communities in a northerly to southerly direction toward the Santa
Rosa Mountains. The Santa Rosa Mountains and their foothills and peaks are part of the Santa
Rosa and San Jacinto Mountains National Monument that will remain as open space in
perpetuity. Photos of Project site locations (as shown in Exhibit 2), are shown in Exhibit 3, Site
Photos.
The original Travertine and Green Specific Plan — approved by the City of La Quinta in 1995
(Exhibit 4, Approved Travertine and Green Specific Plan) was used as the basis for developing the
new Travertine Specific Plan Project (Project) and pertains only to the Travertine site, and not the
Green site which is located northwest of the Travertine site.
To offer flexibility in the development of the Project, and to accommodate future market related
conditions, the proposed Project includes two options for planning development. The primary
option (referred hereafter as Plan A) would be developed as a residential gated community with
resort related uses. The secondary option (Plan B) would be developed as a residential -only
gated community. As shown in Exhibit 5A, Proposed Planning Areas — Plan A, Plan A would consist
of a residential component (Planning Areas 3-10, 12-16), a hotel resort and a villa hotel/timeshare
resort component (Planning Area 2), and a golf clubhouse and banquet facility component
(Planning Area 11). As shown in Exhibit 5B, Proposed Planning Areas — Plan 8, Plan B would
instead consist of a residential component for Planning Areas 2 through 16.
With either plan, the Project will keep to a fixed number of residential dwelling units with a total
of 1,200 units proposed. The only difference between the two plans would be the quantity of
units distributed per Planning Area.
With the City's current projected occupancy rate of 2.64 persons per residential dwelling unit,
the total population at build -out is projected to be at 3,168 persons. Under Plan A Option, the
Project at build -out is expected to consume approximately 408,985,366 gallons of water per year
1 Travertine Specific Plan Project WSA/WSV
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EXECUTIVE SUMMARY
or 1,120,508 gallons per day. Under Plan B Option, the Project at build -out is expected to
consume approximately 208,368,680 gallons of water per year or 570,873 gallons per day.
The estimated project demands under the Plan A Option would total approximately 1,255.13
acre-feet per year (AFY) or, 1.43 acre-feet (AF) per acre. Plan A water demand represents
approximately 1.09 percent of the total water supply number (114,600 AFY) for 2020, and
approximately 0.64 percent of the total water supply number (194,300 AFY) for 2035.
The estimated project demands under the Plan B Option would total approximately 639.46 acre-
feet per year (AFY) or, 0.72 AF per acre. Plan B water demand represents approximately 0.55
percent of the total water supply number (114,600 AFY) for 2020, and approximately 0.32
percent of the total water supply number (194,300 AFY) for 2035. The projected indoor water
demand under Plan A and Plan B will be approximately 280.50 AFY and 215.39 AFY respectively.
The Project site is located within the CVWD District Boundary (Exhibit 7, Coachella Valley Water
District Service Area). The Project will obtain its domestic (potable) water supply from
groundwater wells connected to the Whitewater River Subbasin in the Coachella Valley (Exhibit
8, Coachella Valley Water District Groundwater Subbasins). Currently, the number of
groundwater wells needed to adequately supply the Project is currently under consideration by
CVWD and will be determined upon analysis of this WSA/WSV.
Nonetheless, groundwater storage from the Whitewater River Subbasin will be utilized during
the dry years to balance supply and demand. The groundwater basin has a storage capacity of
approximately 28.8 million acre-feet (AF) and is capable of meeting the water demands of the
Coachella Valley for extended normal and prolonged periods of drought.
CVWD has many programs designed to maximize the water resources available, including
recharge of the basin by obtaining supplies from the Colorado River and State Water Project
(SWP), desalinated agricultural drain water, conversion of groundwater -dependent uses to canal
water, water conservation including budget -based tiered water rates, CVWD's landscaping
ordinance (Ordinance 1302.3), rebate programs, and educational and public outreach programs.
CVWD's groundwater replenishment programs represent a managed effort to eliminate the
overdraft and allow CVWD to maintain the groundwater basin as its primary water supply, and
to recharge the groundwater basin when other supplies are available. Since 2002, CVWD and
Desert Water Agency (DWA) in the western Coachella Valley have increased their SWP Table A
Allotments to 194,100 AFY and have recharged approximately 3 million AF of additional SWP
Table A water since 1973, which averages approximately 70,500 AFY.
Based upon the supply/demand analyses conducted for this Project, CVWD finds that there are
sufficient water supplies available to meet the demands of the proposed Project in addition to
current and planned future water users including manufacturing, industrial, and agricultural
2 Travertine Specific Plan Project WSA/WSV
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EXECUTIVE SUMMARY
users for the 20 -year period between 2020 and 2040. In addition, CVWD has and will continue
to invest resources in promoting water efficient practices throughout its service area, thereby
reducing overall demand. Also, through implementation of the new landscape ordinance and
building code requirements, more stringent requirements will be placed on new development
for all sectors, thereby further reducing future water demand.
3 Travertine Specific Plan Project WSA/WSV
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4 Travertine Specific Plan Project WSA/WSV
HED
7 J..L1'• &IV
ret.d.(f • -)
1
.19
-
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4'
CHO MIRAGE
PALM DESERT
INDIAN WELLS
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LA QUINTA
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ACHELLA
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PROJECT SITE
• y
191
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rjm
•
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een
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--N
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.-Ler
Source:Travertine Specific Plan Amendment No.1. TRG Land Development, 2017
Regional Location- Travertine Specific Plan Amendment No.1
Water Supply Assessment/Water Supply Verification
Exhibit
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EXECUTIVE SUMMARY
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6 Travertine Specific Plan Project WSA/WSV
as
Project Site and Vicinity - Travertine Specific Plan Amendment No. 1 -
Water Supply Assessment/ Water Supply Verification
Exhibit
2
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8 Travertine Specific Plan Project WSA/WSV
pacing Northeas
r� G
Site Photos
Travertine Specific Plan EIR
Exhibit
3
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EXECUTIVE SUMMARY
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10 Travertine Specific Plan Project WSA/WSV
LG
Site Photos
Travertine Specific Plan EIR
Exhibit
3
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12 Travertine Specific Plan Project WSA/WSV
ip
41111
Mar
61.11.1111Aramt 'V
irlitin
=M'
EIE
Approved Travertine and Green Specific Plan
Travertine Specific Plan Amendment No.1
Water Supply Assessment/Water Supply Verification
Exhibit
4
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14 Travertine Specific Plan Project WSA/WSV
CORAL
CANYON
(FUTURE)
PA -18
JEFFERSON
STREET
18.3 AC
LOOP ROAD
WEST
10.8 AC
SECTION 5
ACCESS
PROPOSED
JEFFERSON STREET
Coral
Mountain
PA -1
OS/REC
PA -2
RESORT
100 Rooms
39.7 AC
N.A.P.
PA -3
MDR
106 DU PA -4
24.6 AC LDR
95 DU
28.7 AC
PA -6
MDR
104 DU
20.4 AC
PA -16
LDR
116 DU
53.0 AC
PA -17
OS/REC
LOOP ROAD
EAST
5.8 AC
PA -5 PA -7
LDR LDR
51 DU 57 DU
21.3 AC 18.OAC
PA -8
LDR
86 DU
27.6 AC
PA -9
MDR
130 DU
25.5 AC
PA -14 PA -10
PA -15 LDR MDR
LDR 79 DU 102 DU
77 DU 37.6 AC 18.8 AC
31.0 AC PA -11
PA -21
OS/RESTRICTED
N
LEGEND
Low Density Residential
Medium Density Residential
Resort - Golf Course
PA -12 RESORT/GC
32.1 AC
PA -13 LDR
130 DU
LDR 49.7 AC
67 DU
34.4 AC PA -19
OS/GOLF
Martinez
Rock Slide
Open Space / Golf
Open Space / Recreational
Open Space / Restricted
PA -20
OS/RECREATION
AVENUE 60
AVENUE 62
Master Plan Roadways
TRAVERTINE
Exhibit 5A
Plan A: Land Use Plan
1
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16 Travertine Specific Plan Project WSA/WSV
1
CORAL
CANYON
(FUTURE)
LOO
WEST
10 8AC
PROPOSED
JEFFERSON STREET
Coral
Mountain
PA -1
OS/REC
PA -2
LDR
60DU
39.7 AC
PA -17
OS/REC
PA -18
JEFFERSON
PA -3
STREET
18.3 AC
BAC
PA -15
LDR
77 DU
31.0 AC
SEC
ACC
lo?
SS
PA -7
LDR
49 DU
.0 AC
AC
PA -12
PA -11
LDR
98 DU
32.1 AC
LDR
53 DU
34.4 AC
OS/
ATION
OS/REST
ICTE
PA -19
PA -10
MDR
89 DU
18.8 AC
PA -20
OS/RECREATION
AVENUE 60
AVENUE 62
Martinez
Rock Slide
LEGEND
Low Density Residential
Medium Density Residential
Open Space / Golf
Open Space / Recreational
Open Space / Restricted
Master Plan Roadways
TRAVERTINE
Exhibit No: 5B
Plan B: Land Use Plan
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18 Travertine Specific Plan Project WSA/WSV
RNER5I1!E
1.9 rt..rt
PrNTO. MOUNTAINS
•
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LIF E SAN
fERNA • l NO
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rtT ',SPIN, VA LL E 1"
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BORREGO BADLANDS
Legend
Study Area
- Project Site
Whitewater River Sub -Basin
Water Districts
CVWD
DWA
EIE
CVWD Service Area
Travertine Specific Plan Water Supply Assessment
Exhibit
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20 Travertine Specific Plan Project WSA/WSV
ng Fault
San Andreas Fault
MISSION
CREEK
7-21/02
GARNET ear
.`_ HILL °j°s F.
PALM
SPRINGS
SUBAREA
04S05E15R02S Oj
SKY VALLEY
SUBAREA
•eoir INDIO DESERT HOT
04SO4E15J01S
HILLS SPRINGS
-21.03
THOUSAND
.....%•••• PALMS
�SUBAREA
WHITEWATER ��
(INDIO)
7-21.01
O 05S06E16H01S
0 055
grailirAlo
Project
Site
d
/THERMAL
MECCA
HILLS
AREA
SUBAREA
•
u
4
iftifilbovnenfzimp
07SOSE07R03S
0 07S09E30M01 S
`O 07S08E34G01 S
OASIS
``86
SUBAREA
Key to Features
Fault
Highway
Groundwater Subbasins
Desert Hot
Springs
Garnet Hill
Mission Creek
Whitewater
(Indio)
Groundwater Well
Groundwater Subbasin
Groundwater Subarea
Sa Iton Sea
08S09E33N
BARTON
CANYON
AREA
Source: MWH, 2012
W
CVWD Groundwater Subbasins
Travertine Specific Plan Water Supply Assessment
Exhibit
7
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22 Travertine Specific Plan Project WSA/WSV
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INTRODUCTION
1 Introduction
1.1 Project Description
The 877.5 -acre Travertine Specific Plan Project (Project) site is located in the southeastern portion
of the City of La Quinta (City) (see Exhibit 2, in the Executive Summary). The Project is generally
bounded by the extension of Avenue 60 on the north; the extension of Avenue 64 to the south;
Coachella Valley Water District (CVWD) Dike No. 4 on the east and the extension of Madison
Street; and the extension of Jefferson Street on the west. Further, the Project is located in
Section 33, Township 6 South, Range 7 East, and Sections 3 through 5 in Township 7 South, Range
7 East, San Bernardino Base Line and Meridian; Martinez Mountain and Valerie 7.5 minute
quadrangles; and at Latitude 33° 35' 53" N Longitude 116° 15' 33" W (approximate geographic
center of the site). The Project site consists of the following Assessor Parcel Numbers: 766-110-
002, -003, -004, -005,-007, and -009; 766-120-001, -002, -003, -006, -015, -016, -018, and -021,
753-040-014, 016, and -017, 753-050-007, -013, and -029; and 753-060-003.
Project Plan A
As shown in Exhibit 5A, Proposed Planning Areas - Plan A, the Project layout under Plan A will
consist of resort uses for Planning Areas 2 and 11, low to medium density residential uses for
Planning Areas 3-10, 12-16, an open space golf course links land use type for Planning Area 19, a
community park for Planning Area 15 and a community park with clubhouse for Planning Area 8,
open space recreational uses for Planning Areas 1, 17 and 20, and an open space natural area use
for Planning Area 21. Table 1, Land Use Summary- Plan A, provides a detailed description of the
proposed development under the Plan A option.
Project Plan B
As shown in Exhibit 5B, Proposed Planning Areas -Plan B, the proposed Project layout under Plan B
will consist of low to medium density residential uses for Planning Areas 2-16, an open space golf
course links land use type for Planning Area 19, a community park for Planning Area 15 and a
community park with clubhouse for Planning Area 8, open space recreational uses for Planning
Areas 1, 17 and 20, and an open space natural area use for Planning Area 21. Table 2, Land Use
Summary- Plan B, provides a detailed description of the proposed development under the Plan B
option.
23 Travertine Specific Plan Project WSA/WSV
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INTRODUCTION
Table 1 Land Use Summary- Plan A
Source: TRG Land Inc., November, 2017.
Notes: SFD=DU = Dwelling units; AC = Acre; N/A = Not applicable.
24 Travertine Specific Plan Project WSA/WSV
Land Use Summary- Plan A
Planning
Area
Specific Plan
Designation
Lot Size
Product Type
Net Area
(Acres)
Preferred Target
Density
Dwelling Units /Acre
Maximum Dwelling Units
3
Medium Density
Residential (MDR)
4,000 sq. ft. Duplex
24.6
4.3
106
4
ty Residential
Low Den (LDR)
6,300 sq. ft. Single Family Entry
28.7
3.3
95
5
Low Density Residential
(LDR)
5,775 sq. ft. Patio Homes
21.3
2.4
51
6
Medium Density
Residential (MDR)
4,000 sq. ft. Duplex
20.4
5.3
104
7
ty Residential
Low Den (LDR)
6,300 sq. ft. Single Family Entry.
18.0
3.2
57
8
Residential
Low DensityLDR)
5,775 sq. ft. Patio Homes
27.6
3.1
86
9
Medium Density
Residential (MDR)
4,000 sq. ft. Duplex
25.5
5.1
130
10
Medium Density
Residential (MDR)
4,000 sq. ft. Duplex
18.8
5.4
102
12
Low Density Residential
(LDR)
7,150 sq. ft. Single Family Mid
7,500 sq. ft. Single Family Luxury
9,600 sq. ft. Estates
49.7
2.6
130
13
Low Density Residential
(LDR)
7,500 sq. ft. Single Family Luxury
9,600 sq. ft. Estates
34.4
2.0
67
14
Low Density Residential
(LDR)
7,150 sq. ft. Single Family Mid
7,500 sq. ft. Single Family Luxury
37.6
2.1
79
15
Low Density Residential
(LDR)
7,150 sq. ft. Single Family Mid
7,500 sq. ft. Single Family Luxury
9,600 sq. ft. Estates
31.0
2.5
77
16
Low Density Residential
(LDR)
7,150 sq. ft. Single Family Mid
7,500 sq. ft. Single Family Luxury
9,600 sq. ft. Estates
53.0
2.2
116
Residential Total
1,200
Resort Boutique Hotel
2
25-Casita Villas Spa and Wellness Facility
75 Room Boutique Resort Hotel
39.7
N/A
N/A
Resort Golf Course
11
Golf Club House and Restaurant , Pro Shop, Cart Barn and
Resort Banquets Facility
32.1
N/A
N/A
Open Space /Golf Course Links
19
Golf Course
N/A
153.4
N/A N/A
Open Space /Recreation •
1
Open Space/Recreation
N/A
17.2
N/A
N/A
17
Open Space/Recreation
N/A
18.5
N/A
N/A
20
Open Space/Recreation
N/A
28.4
N/A
N/A
Open Space / Natural
21 Open Space/Natural N/A 162.5 N/A N/A
Master Planned Roadways 1
18
Master Planned
Roadways
N/A
35.1
N/A
N/A
Total Area
877.5
Residential Total
1,200
Source: TRG Land Inc., November, 2017.
Notes: SFD=DU = Dwelling units; AC = Acre; N/A = Not applicable.
24 Travertine Specific Plan Project WSA/WSV
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Table 2 Land Use Summary- Plan B
Source: TRG Land Inc., September, 2017.
Notes: SFD=DU = Dwelling units; AC = Acre; N/A = Not applicable.
25 Travertine Specific Plan Project WSA/WSV
Land Use Summary - Plan B
Planning
Area
Specific Plan
Designation
Lot Size
Product Type
Net Area
(Acres)
Preferred Target
Density
Dwelling Units /Acre
Maximum Dwelling Units
2
Medium Density
Residential (MDR
5,775 sq. ft.
Patio Homes
39.7
1.5
60
3
Medium Density
Residential (MDR)
4,000 sq. ft.
Duplex
24.6
3.7
92
4
Low Density Residential
(LDR)
6,300 sq. ft.
Single Family Entry
28.7
2.9
83
5
Low Density Residential
(LDR)
5,775 sq. ft.
Patio Homes
21.3
2.1
44
6
Medium Density
Residential (MDR)
4,000 sq. ft.
Duplex
20.4
4.4
90
7
Low Density Residential
(LDR)
6,300 sq. ft.
Single Family Entry.
18.0
2.7
49
8
Low Density Residential
(LDR)
5,775 sq. ft.
Patio Homes
27.6
2.7
75
9
Medium Density
Residential (MDR)
4,000 sq. ft.
Duplex
25.5
4.4
113
10
Medium Density
Residential (MDR)
4,000 sq. ft.
Duplex
18.8
4.7
89
11
Low Density
Residential (LDR)
6,300 sq. ft.Single Family Entry.
7,150 sq. ft. Single Family Mid
32.1
3.1
98
12
Low Density
Residential (LDR)
7,150 sq. ft. Single Family Mid
7,500 sq. ft. Single Family Luxury
49.7
2.3
113
13
Low Density
Residential (LDR)
7,500 sq. ft. Single Family Luxury
9,600 sq. ft. Estates
34.4
1.5
53
14
Low Density
Residential (LDR)
7,150 sq. ft. Single Family Mid
7,500 sq. ft. Single Family Luxury
37.6
1.8
69
15
Low Density
Residential (LDR)
7,150 sq. ft. Single Family Mid
7,500 sq. ft. Single Family Luxury
31.0
2.3
72
16
Low Density
Residential (LDR)
7,150 sq. ft. Single Family Mid
7,500 sq. ft. Single Family Luxury
9,600 sq. ft. Estates
53.0
1.9
100
Residential Total
1200
1 Open Space /Golf Course Links
19
Golf Course Links
N/A
153.4
N/A
N/A
Open Space /Recreati r .
■
1
Open Space/Recreation
N/A
17.2
N/A
N/A
17
Open Space/Recreation
N/A
18.5
N/A
N/A
20
Open Space/Recreation
N/A
28.4
N/A
N/A
Open Space / Natural
21 Open Space/Natural N/A 162.5 N/A N/A
Master Planned Roadways
18 Master Planned Roadways N/A
35.1
N/A
N/A
Total Area
877.5
Residential Total
1,200
Source: TRG Land Inc., September, 2017.
Notes: SFD=DU = Dwelling units; AC = Acre; N/A = Not applicable.
25 Travertine Specific Plan Project WSA/WSV
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INTRODUCTION
1.2 Regulatory Requirements
The Project is subject to the California Environmental Quality Act (CEQA). The Project is also a
subdivision as defined by California Government Code Section 66473.7 and therefore subject to
Section 66410 of the Subdivision Map Act.
CVWD, as the Public Water System (PWS) purveyor for the project, has determined that a Water
Supply Assessment (WSA) is required to fulfill CEQA compliance and that a written Water Supply
Verification (WSV) is required pursuant to the Subdivision Map Act.
CVWD completed its 2015 Urban Water Management Plan (UWMP) in compliance with the
Urban Water Management Planning Act established in 1983. More recently, the Urban Water
Management Planning Act was amended by SBx7-7, a bill that mandates a 20 percent reduction
in per -capita water use by 2020. Together, SBx7-7 and the 2015 UWMP are considered the
primary source document for the Project's WSA/WSV. The 2010 Coachella Valley Water
Management Plan (CVWMP) Update discusses the Quantification Settlement Agreement (QSA).
The QSA and related agreements were signed in 2003. A number of lawsuits have unsuccessfully
challenged the QSA in State of California (State) and federal courts. Both the 2015 UWMP and
2010 CVWMP Update evaluate water supplies under the QSA and prior to implementation of the
QSA. CVWD has prepared and adopted the 2015 UWMP and the demands of this Project are
included in that document.
The State of California Department of Water Resources (DWR) issues its Final State Water Project
Delivery Capability Report (SWPDCR) generally every two years. The 2015 SWPDCR report was
utilized in the 2015 UWMP. The 2015 SWPDCR contains the most recent information and
accounts for the impacts to water delivery capability through 2035 associated with climate
change and recent federal litigation. Based on information from the 2015 SWPDCR, the average
capability of SWP Table A deliveries through 2035 is projected to be 62 percent of SWP Table A
amounts after taking into consideration the effects of climate change. In order to anticipate
future reductions in capability, the 2010 CVWMP Update, and the 2015 UWMP assume an even
lower long-term reliability of 50 percent.
Effective January 1, 2017, SB 1262 amends Water Code Section 10910, the WSA statute, to
require that information regarding the Sustainable Groundwater Management Act (SGMA) be
included in a WSA if a water supply for a proposed project includes groundwater from a basin
that is not adjudicated and is designated medium or high-priority. The water supply for this
Project will come from the Whitewater River (Indio) Subbasin, an un -adjudicated, medium
priority subbasin. CVWD is a Groundwater Sustainability Agency (GSA) in the subbasin and has
submitted the 2010 CVWMP Update to DWR as the Alternative Groundwater Sustainability Plan
for the subbasin.
26 Travertine Specific Plan Project WSA/WSV
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1.3 Purpose of Document
CVWD, as a Public Water System (PWS), is required by law to provide WSA/WSV documentation
during the CEQA process, and is required by law to provide a WSV following approval of the
Tentative Map(s) for the residential portion of the Project. This information is included in the
CEQA documentation and becomes evidence used in the approval processes for the proposed
development. It is noted that this WSA/WSV addresses the overall water supply available to
CVWD to meet the demands of existing customers and other future demands. The WSA/WSV
does not address the water delivery system within CVWD's system since the focus is on the
overall water supply. Adequacy of the delivery system is addressed in CVWD's Water Master
Plan. The WSA/WSV makes a finding of reasonable sufficiency of water supplies that are either
available or will be available to CVWD to meet future demands. The Water Code requires a
determination for a 20 -year period (2016-2036) from the start of the project development.
The WSA/WSV must be reviewed every five years, or in the event that the water planning
assumptions have changed, until the Project begins construction. The Project applicant shall
notify CVWD when construction has begun. The review will ensure that the information included
in the WSA/WSV remains accurate and no significant changes to either the Project or CVWD's
water supply have occurred. If neither the Project applicant nor the lead agency contacts CVWD
within five years of approval of this WSA/WSV, it will be assumed that the Project no longer exists,
and the water supply assessment and verification provided by this documentation will become
invalid.
1.3.1 Water Supply Assessment
Requirements for the preparation of a WSA are set forth in Senate Bill 610 (SB 610), which was
enacted in 2001 and became effective January 1, 2002. SB 610 amended Section 21151.9 of the
Public Resources Code and requires cities and counties to request specific information on water
supplies from the PWS that would serve any project that is subject to CEQA and is defined as a
"Project" in Water Code Section 10912. This information is to be incorporated into the
environmental review documents prepared pursuant to CEQA.
State Water Code Section 10912 Defines a "Project" as any of the following:
1. A proposed residential development of more than 500 dwelling units.
2. A proposed shopping center or business establishment employing more than 1,000
persons or having more than 500,000 square feet of floor space.
3. A proposed commercial office building employing more than 1,000 persons or having
more than 250,000 square feet of floor space.
4. A proposed hotel or motel, or both, having more than 500 rooms.
5. A proposed industrial, manufacturing, or processing plant, or industrial park planned
to house more than 1,000 persons, occupying more than 40 acres of land, or having
more than 650,000 square feet of floor area.
27 Travertine Specific Plan Project WSA/WSV
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6. A mixed-use project that includes one or more of the projects specified in this
subdivision.
7. A project that would demand an amount of water equivalent to, or greater than, the
amount of water required by a 500 dwelling unit project.
Full build -out of the Travertine Specific Plan is a "Project" as defined by Water Code Section
10912 which requires a WSA because it proposes over 500 housing units (1,501 total).
Effective January 1, 2017, SB 1262 amends Water Code Section 10910, the WSA statute, to
require that SGMA-related information be included in a WSA if a water supply for a proposed
project includes groundwater from a basin that is not adjudicated and is designated medium or
high-priority. The proposed Project will use groundwater from the Whitewater River (Indio)
Subbasin, which is designated medium priority by DWR and is not adjudicated.
1.3.2 Water Supply Verification
Senate Bill 221 (SB 221) was enacted in 2001 and became effective as of January 1, 2002. SB 221
amends Section 11010 of the Business and Professional Code, and amends Sections 66455.3 and
66473.7 to the Government Code. SB221 establishes the relationship between the WSA prepared
for a Subdivision and the project approval under the Subdivision Map Act. Pursuant to California
Government Code Section 66473.7, the PWS must provide a written verification of sufficient
water supply prior to the approval of a new subdivision.
A Water Supply Verification (WSV) is required prior to the approval of a tentative subdivision
map, or a parcel map for which a tentative map was not required, or a development agreement
for a subdivision of property of more than 500 dwelling units, except as specified, including the
design of the subdivision or similar type of improvement. The purpose of the WSV is to provide
the legislative body of a city, county or the designated advisory agency with written verification
from the applicable public water purveyor that a sufficient water supply is available or, in
addition, a specified finding is made by the local agency that sufficient water supplies are, or will
be, available prior to completion of the subdivision.
Therefore, a WSV is required by law since the proposed project has over 500 housing units and is
a "Subdivision" as defined by Government Code Section 66473.7.
1.4 Water System and Supply
1.4.1 Water System
The CVWD public water system is the water system that will be used to supply the Project. All
the in -tract water distribution facilities will be shown on subsequent improvement plans and will
be designed and constructed in accordance with CVWD requirements.
28 Travertine Specific Plan Project WSA/WSV
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CVWD's existing water supply and conveyance systems include, or will include, adequate capacity
for daily demands and emergency fire protection. This includes groundwater pumping,
transmission pipelines, distribution storage and surface pumping within internal roadways or
other rights-of-way to provide domestic service to each residential tenant, as well as the
proposed community parks, and multiple neighborhood parks within the Project.
1.4.2 Water Supply
CVWD provides services for domestic water, irrigation water, sanitation sewerage collection,
wastewater reclamation and recycling, canal water, storm water protection and agricultural
drainage. The CVWD service area encompasses roughly 637,000 acres and includes the central
and eastern portions of the Coachella Valley within Riverside County, as well as small portions of
Imperial and San Diego County (refer to Exhibit 5 in the Executive Summary).
CVWD currently has approximately 108,000 domestic water connections and has a groundwater
production capacity of over 300,000 acre-feet per year (AFY). Areas served with domestic water
by CVWD include a portion of lands near Desert Hot Springs, the Indio Hills area, and a portion of
Cathedral City. CVWD serves all of Rancho Mirage, Thousand Palms, Palm Desert, Indian Wells,
La Quinta, and portions of Indio and Coachella. CVWD also serves other rural communities,
including Thermal, Mecca, Oasis, Desert Shores, Salton Sea Beach, Salton City, North Shore,
Bombay Beach, and Hot Mineral Springs and other portions of unincorporated Riverside County
(see Exhibit 6).
The Coachella Valley is bordered on the west and north by the Santa Rosa, San Jacinto and San
Bernardino Mountains, which provide an effective barrier against coastal storms, and which
greatly reduce the contribution of direct precipitation to recharge the valley's groundwater basin.
The majority of natural recharge comes from runoff from the adjacent mountains.
Development throughout the Coachella Valley has been dependent on groundwater as a source
of water supply. The demand for groundwater annually exceeds the limited natural recharge of
the groundwater basin. Therefore, imported water is used to recharge the aquifer and reduce
groundwater overdraft.
1.4.3 Historical Context
The need for additional water supplies in the Coachella Valley has been recognized for many
years. The formation of CVWD in 1918 was a direct result of concern from local residents about a
plan to export water from the Whitewater River to Imperial County. Coachella Valley residents
recognized that action was needed to stem the decline of the water table, which was occurring
as a result of local pumping in the eastern portion of the Coachella Valley. The decline prompted
CVWD to enter into an agreement for the construction of the Coachella Branch of the All-
American Canal to bring Colorado River water to the Coachella Valley. Since 1949, the Coachella
Canal has been providing water for irrigation use in the area that generally encompasses Indio
29 Travertine Specific Plan Project WSA/WSV
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INTRODUCTION
and La Quinta southerly to the Salton Sea. Colorado River water is delivered by an underground
irrigation distribution piping system from the 120 -mile canal to farms and a growing number of
golf courses in the Coachella Valley. In recent years, CVWD has begun a program of recharging
the aquifer in the eastern portion of the Coachella Valley with this source.
The need for additional water supplies in the Coachella Valley has also been recognized as a result
of development progression into the western portion of the Coachella Valley. As a result, in 1963
CVWD and the DWA, which serves the Palm Springs area and a portion of Cathedral City, and
imports water for these areas and the Desert Hot Springs area, entered into separate contracts
with the State of California (State) to ensure that SWP water would be available. Because a direct
pipeline from the SWP system to the Coachella Valley does not exist, CVWD and DWA entered
into an exchange agreement with the Metropolitan Water District of Southern California (MWD)
to receive water from the MWD Colorado River Aqueduct, which crosses the upper portion of
the Coachella Valley near Whitewater. In exchange, CVWD and DWA have their SWP water
allotment delivered to MWD. Since 1973, in exchange for their SWP water, CVWD and DWA have
been receiving Colorado River water from MWD's Colorado River Aqueduct turnout located at
Whitewater Canyon to replenish groundwater in the Coachella Valley.
CVWD recognized the need to provide other sources of water to replenish the Coachella Valley
groundwater basin. CVWD has been recycling reclaimed wastewater since 1967 and operates
five water reclamation plants, two of which currently recycle water. Recycled water is currently
used only for golf course and greenbelt irrigation in the Cities of Palm Desert, Indian Wells, and
Indio, thereby reducing demand for groundwater supplies in the basin, and is not used to
replenish the groundwater basin.
1.5 Existing Water Management Plans
1.5.1 2010 Coachella Valley Water Management Plan Update
CVWD began the first water management planning process for the early 1990s to address
overdraft conditions with the Coachella Valley Aquifer and to ensure that there would be
sufficient water supplies for the future. The plan serves as a 35 -year blueprint for wise water
management and for the basis of all CVWD's efforts to preserve the Coachella Valley's
groundwater source.
The CVWMP was adopted by CVWD Board of Directors (Board) in 2002. A Programmatic
Environmental Impact Report was prepared for the CVWMP and certified under CEQA. The goal
of the CVWMP is to reliably sustain the water supply by meeting current and future water
demands in a cost effective and sustainable manner. This goal will be met by achieving the
following programmatic objectives:
• Meet current and future water demands with a 10 percent supply buffer;
30 Travertine Specific Plan Project WSA/WSV
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INTRODUCTION
• Eliminate long-term groundwater overdraft;
• Manage and protect water quality;
• Comply with State and federal laws and regulations;
• Manage future costs; and,
• Minimize adverse environmental impacts.
The Board recognized the need to update the CVWMP periodically to respond to changing
external and internal conditions. The 2010 CVWMP Update meets that need. It defines how the
goal will be met given changing conditions and new uncertainties regarding water supplies, water
demands, and evolving federal and State regulations.
The 2010 CVWMP Update calls for a multifaceted approach including:
• Increased water conservation by all types of water users;
• Increased imported water supply from the Coachella Canal and SWP;
• Increased use of the imported supply and recycled water, instead of groundwater, for
irrigation; and
• Expanded groundwater replenishment and source substitution efforts.
The 2010 CVWMP Update identifies several water conservation measures with the goal to reduce
overall water consumption by 20 percent by 2020, and the goal to maintain this level of reduction
through 2045. These measures include water efficient landscaping and irrigation controls, water
efficient plumbing, tiered or seasonal water pricing, public information and education programs,
alternative water supplies, water restrictive municipal development policies, appointing a CVWD
conservation coordinator and refining the maximum water allowance budget for landscaped and
recreational areas. The 2010 CVWMP Update reduces reliance on groundwater sources by fully
utilizing Colorado River water, SWP water and recycled water supplies, and implementing more
conservation over the long-term.
The 2010 CVWMP Update Executive Summary (Appendix B) emphasizes cooperation with
municipalities, local water agencies, and tribes in regional planning and implementation. The
following are among some of the recommended activities outlined in the update for the CVWD
Board of Directors to consider over the next 35 years:
• Provide incentives and support to agricultural customers to conserve water, such as
through converting from flood/sprinkler irrigation to more efficient micro-sprinkler/drip
systems;
• Encourage existing golf courses to convert landscaping to meet the most current
Landscape ordinance;
• Expand landscape conversion rebates for domestic customers to encourage less grass and
more desert appropriate landscaping; and
• Complete construction of subsequent phases of the Mid -Valley Pipeline system to provide a
blend of recycled and Colorado River water for golf courses in lieu of groundwater.
31 Travertine Specific Plan Project WSA/WSV
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INTRODUCTION
The 2010 CVWMP Update recognizes that groundwater storage makes up the difference between
demand and supply. Other than canal water for irrigation and groundwater recharge, recycled
water and desalinated drain water, all water delivered to the end users is obtained from the
groundwater basin. The groundwater basin has a capacity of approximately 28.8 million acre- feet
(AF). It is capable of meeting the water demands of the Coachella Valley for extended periods,
thereby buffering the groundwater resource during period of varying water availability.
The 2010 CVWMP Update discusses many CVWD programs to maximize the water resources
available including:
• Recharge of Colorado River and SWP supplies;
• Recycled wastewater, desalinated agricultural drain water, conversion of groundwater
uses to canal water; and
• Water conservation including tiered water rates, landscaping ordinance, outreach and
education.
The 2010 CVWMP Update and CVWD's Replenishment Assessment Program established a
comprehensive and managed effort to eliminate overdraft. The programs allowed CVWD to
maintain the groundwater basin as its primary water supply and to recharge the groundwater
basin as other supplies become available. For reference, the Executive Summary of the 2010
CVWMP Update is provided in Appendix A.
CVWD prepared the 2014 and 2017 CVWMP Status Reports to evaluate the effectiveness of the
2010 CVWMP Update, including progress on eliminating overdraft. Both Status Reports
demonstrated that the 2010 CVWMP Update is working and that continued implementation
ensures that overdraft will be eliminated within 10 years as shown in Exhibit 8, Status of the
Overdraft — Annual Change in Storage. The status of the Annual Change in Storage, is updated
annually in CVWD's Engineer's Report on Water Supply and Replenishment Assessment. Over the
ten-year period preceding 2014, there was no overdraft mainly as a result of increases in urban
conservation and increases in imported water deliveries to the Coachella Valley. Between 2014
and 2017, imported water deliveries were significantly reduced as a result of the Statewide
Drought, however, groundwater pumping was also significantly reduced due to the Governor's
drought restrictions.
Groundwater levels have increased in the Palm Springs area and in the eastern portion of the
Coachella Valley. However, water levels are still declining in the Mid -Valley areas near Rancho
Mirage, Palm Desert and Indian Wells. Groundwater levels in this area will continue to decline
until full implementation of Mid -Valley (between Eastern and Western Coachella Valley)
programs that reduce pumping take effect. These Mid -Valley Programs include urban
conservation; source substitution programs including non -potable water system expansion to
32 Travertine Specific Plan Project WSA/WSV
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INTRODUCTION
golf courses, Colorado River water treatment for municipal use; and additional recharge. The
2014 and 2017 CVWMP Status Reports are publically available at www.cvwd.org.
1.5.2 CVWD 2015 Urban Water Management Plan, SBx7-7 and Water Shortage Contingency
Ordinance
The 2015 CVWD UWMP was approved by the State on September 29, 2016. Water Code Section
10910 (c)(2) states that, if demand from potential future growth is accounted for in the most
recently adopted 2015 UWMP, the water supplier may incorporate the requested information
from the 2015 UWMP in preparing the WSA/WSV. CVWD demand projections contained in the
2015 UWMP take into account the increased growth throughout its service area.
In November 2009, SBx7-7 was approved and adopted by the State. DWR provides alternative
water use reduction targets for urban water suppliers to select, and guidance to achieve the
target goal. The legislation includes requirements to improve the management of CVWD water
resources by monitoring groundwater basins, developing agricultural water management plans,
reducing Statewide per capita water consumption by 2015 and 2020, and reporting water
diversions and uses in the Sacramento Delta.
SBx7-7 creates a framework of future planning and actions by urban and agricultural water
suppliers to reduce California's water use. This bill requires the development of agricultural
water management plans and requires urban per capita water consumption to be reduced by 20
percent by the year 2020.
The recent drought that began in 2013 resulted in record low precipitation both Statewide and
in the Coachella Valley, and resulted in implementation of severe water use restrictions
mandated by the State Water Resources Control Board (SWRCB).
33 Travertine Specific Plan Project WSA/WSV
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This page intentionally left blank.
34 Travertine Specific Plan Project WSA/WSV
Qj
Qj
a.
Q;
<t
250,000
200,000
150,000
100,000
50,000
-50,000
- 100,000
- 150,000
- 200,000
— Annual Change in
Storage
— 10 yr Average Chg in Storage
20 yr Average Chg in Storage
0 1.11 0 1.11
0'\ 0'\ 0 0
0'\ 0'\ 0 0
.-t N N
0
.-t
0
N
1.11
.-t
0
0
N
0
N
0
m
0
N
1.11
m
0
N
0
0
Source: CVWD: 2014 CVWMP Status Report
EIE
Status of Overdraft and Change in Storage
Exhibit
8
Travertine Specific Plan Water Supply Assessment
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36 Travertine Specific Plan Project WSA/WSV
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On January 17, 2014, the governor proclaimed a State of Emergency and on April 1, 2015, the
governor issued Executive Order B-29-15, which ordered the SWRCB to adopt emergency
regulations imposing restrictions to achieve a 25 percent reduction in potable urban water usage
across the State. Agencies assigned to Tier 9, including CVWD, having residential water use above
215 gallons per capita per day (gpcd), were required to reduce water use by 36 percent compared
to its 2013 water use. This reduction was reduced to 32 percent in February 2016, and became
locally implemented in May 2016.
Following an above normal snowpack in northern California, on May 9, 2016, Governor Brown
issued Executive Order B-37-16 that focused on long-term water use efficiency. In response to
that order, the SWRCB adopted revised emergency regulations in May 2016 that transition the
mandates away from demand -based regulations. Under the new regulations, individual districts
will self -certify the level of available water supplies assuming three additional dry years and the
level of conservation necessary to assure adequate supply over that time. It is anticipated that
the new self -certification process will result in a reduction in the emergency mandatory reduction
target imposed on CVWD by the SWRCB.
CVWD's urban water shortage contingency planning efforts are described in detail in Section 8 of
CVWD's 2015 UWMP including a description of each ordinance CVWD has adopted during
Governor Brown's drought emergency declaration, stages of implementation, and restrictions
and prohibitions on end users.
1.5.3 Integrated Regional Water Management Plan
Integrated Regional Water Management Planning is a collaborative approach to managing all
aspects of water resources in a region and is encouraged by DWR. It involves multiple agencies,
stakeholders, individuals and groups; and attempts to address the issues and differing
perspectives of all the entities involved through mutually beneficial solutions. In 2008, the five
public water agencies in the Coachella Valley formed the Coachella Valley Regional Water
Management Group (CVRWMG); in 2010 they adopted the Coachella Valley Integrated Regional
Water Management Plan (IRWMP). The IRWMP was updated in 2014 and will be updated again
in 2018. These efforts ensure that the Coachella Valley as a whole will focus on sustainable water
resources. All water agencies in the Coachella Valley work together, share information, discuss
concerns and viewpoints, and build consensus in supporting future projects that benefit the
entire region. Since its formation, the CVRWMG has added Valley Sanitary District (VSD) as a
member and is working toward adding the Agua Caliente Band of Cahuilla Indians (ACBCI) as a
member.
1.5.4 Sustainable Groundwater Management Act Alternative Plan
In September 2014, Governor Brown signed three -bills into law, AB 1739 (Dickinson), and SB 1319
and SB 1168 (Pavley), that became collectively known as the Sustainable Groundwater
37 Travertine Specific Plan Project WSA/WSV
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INTRODUCTION
Management Act (SGMA), creating a framework for sustainable, local groundwater management
for the first time in California history. SGMA was amended in 2015 by SB 13 (Pavely).
SGMA requires local agencies to establish a new governance structure, known as Groundwater
Sustainability Agencies, and to developing groundwater sustainability plans for groundwater
basins or sub -basins that are designated as medium or high priority. The Whitewater River (Indio)
Subbasin has been designated by DWR as a medium priority subbasin. In 2016, CVWD filed a
Notice of Election with DWR to become a Groundwater Sustainability Agency within its service
area over the subbasin and has submitted the 2010 CVWMP Update as an Alternative
Groundwater Sustainability Plan.
38 Travertine Specific Plan Project WSA/WSV
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WATER SUPPLY VERIFICATION (WSV)
2 Water Demands and Conservation Measure)
2.1 Water Demand Factors
As discussed in the Executive Summary, full build -out of the Travertine Specific Plan Project
(Project) offers flexibility in the development process by proposing two options: Plan A would
allow development of a residential gated community with resort related uses and Plan B would
allow development as a residential -only gated community. Either plan, as shown in Exhibit 9,
Landscape Structure Diagram, will provide landscaping for proposed community parks and
neighborhood pocket parks; street-scaping along Jefferson Street and along loop connector
streets; and street-scaping of slope areas between community area tracts and individual interior
lots. All landscaped areas will use water efficient, drought tolerant varieties of trees and shrubs
and xeriscape groundcover (see Exhibit 10, Plant Palette List). To further enhance the water
conservation objective, no decorative water features or fountains are proposed as part of the
landscaping plan.
The unit water usages for this Water Supply Assessment/Water Supply Verification (WSA/WSV)
are based on indoor water use performance standards of 55 gallons per capita day (gpcd) as
provided in the California Water Code for residential water demand and the American Water
Works Association Research Foundation (AWWARF). Outdoor landscape water demand is based
off of Coachella Valley Water District (CVWD) Ordinance No. 1302.3 in accordance with the
California Department of Water Resources (DWR) Model Water Efficient Landscape Ordinance
(MWELO).
The overall goal of the CVWD's Ordinance 1302.3 is to reduce landscape water use, reduce or
eliminate runoff in streets, and limit turf. As applicable to the proposed project, CVWD's
Maximum Applied Water Allowance (MAWA), as outlined in Ordinance No. 1302.3, is a calculative
tool used to estimate outdoor irrigation usage. The MAWA complies with Division 2, Title 23,
California Code of Regulation, Chapter 7, Section 702 as found in Appendix D of Ordinance 1302.3.
The following factors are applicable to the proposed Project:
• Indoor Residential (single-family and multi -family) = 55 gallons per day (gpd)/person.
• Because the Project is located within the City of La Quinta's Sphere of Influence (SOI),
the Project was assessed using the City of La Quinta average household population
density of 2.64 persons/dwelling unit (per CA Department of Finance Table 2: E-5
2017) x 55 gpd/person = 145.2 gpd/dwelling unit.
• Outdoor irrigation based on CVWD's MAWA and Estimated Annual Water Applied
(EAWA).
39 Travertine Specific Plan Project WSA/WSV
The
a E Group
WATER SUPPLY VERIFICATION (WSV)
• Indoor non-residential (neighborhood commercial) for Mixed -Use Areas based on
AWWARF.
• Common area landscape (parks, catchments, medians) based on MAWA.
2.2 Project Water Management Programs
Land uses within the Project development will operate under the following water management
programs:
• All appliances and indoor fixtures will meet or exceed current water efficiency
standards set by California Plumbing Code.
• Outdoor landscaping will comply with CVWD's model landscape ordinance 1302.3.
• Urban water users will participate in CVWD's Budget Based Tiered Rates program.
• Projects will pay CVWD's supplemental water supply charges to mitigate additional
demand on existing water supplies.
• All effluent from this Project will be treated by CVWD at its Wastewater Reclamation
Plant No. 10 (WRP 10). CVWD recycles approximately 95 percent of its WRP 10
effluent for non -potable irrigation use.
40 Travertine Specific Plan Project WSA/WSV
PROPOSED
JEFFERSON STREET
CORAL ,i T&
CANYON..7C
(FUTURE))
II FG NfY
Jefferson Street Streetscape
Loop Road Streetscape
Parks
Golf Course / Open Space
I�--J
h --'I
Gates Project / Formal Entry
Trails - Off Street
0 I
Trailhead
Community Slope Landscape
TRAVERTINE
Natural Landscape Transition
Trails - On Street
Exhibit No: 9
Landscape Structure Diagram
The
asAltum
Group
WATER SUPPLY VERIFICATION (WSV)
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42 Travertine Specific Plan Project WSA/WSV
Exhibit 10 Plant Palette List
Botanical Name
Common Name
Trees
Acacia smallii
Sweet Acacia*
Acacia salicina
Willow Acacia*
Acacia stenophylla
Shoestring Acacia*
Chilopsis linearis
Desert Willow
Chitalpa x tashkentensis
Chitalpa
Citrus
Citrus Tree
Cupressus arizonica
Arizona Cypress
Dalea spinosa
Smoke Tree
Fraxinus uhdei 'Majestic Beauty'
Evergreen Ash
Lysiloma thornberi
Feather Bush
Olneya tesota
Desert Ironwood
Parkinsonia 'Desert Musem'
Palo Verde
Parkisonia floridum
Blue Palo Verde
Parkinsonia praecox
Sonoran Palo Verde
Pinus eldarica
Afghan Pine
Prosopisglandulosa
Texan Honey Mesquite
Quercus virginiana 'Heritage'
Heritage Live Oak
Rhus lancea
African Sumac
Schinus molle
California Pepper
Thevetia peruviana
Yellow Oleander
Vitex angus-catus
Chaste Tree
Palms
Butia capitata
Pindo Palm
Brahea armata
Mexican Blue Palm
Chamerops humilis
Mediterranean Fan Palm
Cycas revoluta
Sago Palm
Phoenixdactylifera
Date Palm
Phoenix roebelenii
Pigmy Date Palm
Washingtonia filifera
California Fan Palm
Washingtonia robusta
Mexican Fan Palm
Shrubs
Alyogne huegelii
Blue Hibiscus
Bougainvillea 'Crimson Jewel'
Bougainvillea
Baileya multiradiata
Desert Marigold
Buxus microphylla japonica
Japanese Boxwood
Cassia nemophilla
Green Cassia
Cassia phyllodinea
Silvery Cassia
Calliandra californica
Fairy Duster
Callistemon viminalis 'Little John'
Dwarf Weeping Bottlebrush
Carissa macrocarpa 'boxwood beauty'
Natal Plum
Carissa macrocarpa 'Tuttlei'
Natal Plum
Dalea pulchra
Indigo Bush
Dodonea viscose
Hopseed Bush
1
The
u
Group
WATER SUPPLY VERIFICATION (WSV)
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44 Travertine Specific Plan Project WSA/WSV
Botanical Name
Common Name
Shrubs
Encelia farinosa
Brittle Bush
Euryops p. 'Viridis'
Green-leaf Euryops
Ilex vomitoria 'Stokes'
Stokes Holly
Justicia californica
Chuparosa
Justicia spicigera
Mexican Honeysuckle
Lantana montevidensis 'Trailing Purple"
Purple Spreading Lantana
Lantana monevidensis 'New Gold'
Golden Mound Lantana
Leucophyllumfrutescens
Texas Ranger
Leucophyllum frutescens 'Thunder Cloud'
Texas Ranger
Leucophyllum langmaniae'Rio Bravo'
Cinnamon Sage
Ligustrum j. 'Texanum'
Texas Privet
Myrtus communis
True Myrtle
Nandina domestica 'Compacta'
Compact Heavenly Bamboo
Nandina domestics 'Harbor Dwarf'
Dwarf Heavenly Bamboo
Nandina domestica 'Nana'
Dwarf Heavenly Bamboo
Nerium oleander 'Petite Pink'
Dwarf Oleander
Phlomisfruticosa
Jerusalem Sage
Photinia fraseri
Fraser's Photinii
Pittosporum tobira 'Variegata'
Variegated Mock Orange
Pittosporum tobira 'Wheeleri'
Dwarf Mock Orange
Rhaphiolepis i. 'Ballerina'
Indian Hawthorn
Rhaphiolepis i. 'Springtime'
Indian Hawthorn
Rosemarinus officinalis 'Prostratus'
Dwarf Rosemary
Ruellia peninsularis
Baja Ruellia
Salvia clevlandii
Cleveland Sage
Salvia greggii
Autumn Sage
Salvia leucantha
Mexican Sage
Senna artemisiodes
Feathery Cassia
Tagetis lemmonii
Mexican Marigold
Tecoma Stans
Yellow Trumpet Flower
Verbena rigida
SandpaperVerbena
Verbena gooddingii
Goodding Verbena
Wedelia trilobata
Wedelia
Xylosma congestum
Xylosma
Espaliers and Vines
Bougainvillea 'Barbara Karst'
Bougainvillea
Bougainvillea 'Lavender Queen'
Bougainvillea
Clytostoma callistegiodes
Lavender Trumpet Vine
Calliandra inequilatera
Pink Powder Puff
Ficus pumila
Creeping Fig
Gelsemium sempervirens
Carolina Jessamine
Lonicerajaponica
Honeysuckle
Macfadeyena unguis-cati
Catclaw Vine
Tecomaria capensis
Cape Honeysuckle
Desert Accents
Aeonium arboretum
NCN
Agave Americana
Century Plant
Agave attenuata
Fox Tail Agave
Agave gemniflora
Twin-Flowered Agave
Agave vilmoriniana
Octopus Agave
2
The
Altu
Group
WATER SUPPLY VERIFICATION (WSV)
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46 Travertine Specific Plan Project WSA/WSV
Botanical Name
Common Name
Aloe arborescens
Tree Aloe
Aloe ferox
Cape Aloe
Aloe saponaria
Soap Aloe
Aloe striata
Coral Aloe
Caesalpina gilliesii
Yellow Bird of Paradise
Caesalpinia mexicana
Mexican Bird of Paradise
Caesalpinia pulcherrima
Red Bird of Paradise
Crassula falcata
NCN
Dasylirion wheeleri
Desert Spoon
Dracenea draco
Dragon Tree
Echinocactusgrusonii
Golden Barrel Cactus
Echinocereusengelmanii
Englemann's Prickly Pear
Euphorbia rigida
Gopher Plant
Fouquleria splendens
Ocotillo
Hesperaloe parviflora
Red Yucca
Opuntia basilaris
Beavertail Cactus
Pachycereus marginatus
Mexican Pipe Organ
Penstemon parryi
Parry Penstemon
Euphorbia milli
Crown of Thorns
Yucca aloifolia
Spanish Bayonet
Yucca gloriosa
Soft Tip Yucca
Yucca whipplei
Our Lords Candle
Groundcover
Acacia redolens
Prostrate Acacia
Baccharis p. 'Centennial'
Coyote Bush
Carissa macrocarpa `Green Carpet'
Natal Plum
Convolvulus cneorum
Silver Bush Morning Glory
Gazania 'Mitsua Orange'
Gazania
Gazania 'Mitsua Yellow'
Gazania
Gazania rigens leucolaena
Trailing Gazania
Myoporum parviflorum
Myoporum
Oenothera berladieri
Mexican Evening Primrose
Rosmarinus officinalis 'Prostratus'
Prostrate Rosemary
Senicio manralisceae
Blue Fingers
Verbena tenuisecta
Moss Verbena
Grasses
Muhlenbergia capillaries 'Regal Mist'
Regal Mist
Mulhemburgia rigens
Deer Grass
Festuca glauca
Blue Fescue
Helictotrichon sempervirens
Blue Oat Grass
Pennisetum s. 'Rubrum'
Red Fountain Grass
Perennials
Cuphea Ilavea
Bat-Faced Cuphea
Guara lindheimeri
Guara
Hemerocalis hybrids
Daylily
Lavendula stoechas
Spanish Lavender
Oenothera beriandieri
Mexican Primrose
3
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48 Travertine Specific Plan Project WSA/WSV
Botanical Name
Common Name
Penstemon spectabilis
Showy Penstemon
Penstemon superbus
NCN
Sphaeralcea ambigua
Globe Mallow
Caesalpina gilliesii
Yellow Bird of Paradise
NCN= No Common Name
4
The
asAltum
Group
WATER SUPPLY VERIFICATION (WSV)
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50 Travertine Specific Plan Project WSA/WSV
The
a E Group
WATER SUPPLY VERIFICATION (WSV)
2.3 Residential Water Demands
The proposed Project indoor water demands for Plan A and Plan B have been evaluated
separately. Table 3, Indoor Residential Water Demand - Plan A
Table 3 Indoor Residential Water Demand - Plan A.
Planning
Area
Net Area
(Acres)
Estimated
Total Units
Estimated'.
occupants
per home
Indoor Residential Water Demand
Gpd2/
occupant
Gpd2/ Unit
Total Units
Demand (GpdZ)
Annual
Demand
(AFY3,4)
3
24.6
106
2.64
55
145.20
15,391
17.24
4
28.7
95
2.64
55
145.20
13,794
15.45
5
21.3
51
2.64
55
145.20
7,405
8.29
6
20.4
104
2.64
55
145.20
15,101
16.92
7
18.0
57
2.64
55
145.20
8,276
9.27
8
27.6
86
2.64
55
145.20
12,487
13.99
9
25.5
130
2.64
55
145.20
18,876
21.14
10
18.8
102
2.64
55
145.20
14,810
16.59
12
49.7
130
2.64
55
145.20
18,876
21.14
13
34.4
67
2.64
55
145.20
9,728
10.90
14
37.6
79
2.64
55
145.20
11,471
12.85
15
31.0
77
2.64
55
145.20
11,180
12.52
16
53.0
116
2.64
55
145.20
16,843
18.87
Total
1,200
Total
174,240.00
195.17
Source: Altum Group March 2017; Occupancy load of 2.64 persons/dwelling unit derived from CA Department of Finance Table
2: E-5 City/County Population and Housing Estimates, 1/1/2017 for the City of La Quinta.
Notes:
1. Estimate based on 55 gpd/person x 2.64 persons/unit = 145.20 gpd/unit. Project Site located within La Quinta City Limits.
2. Gpd = gallons per day.
3. AFY = acre-feet per year.
4. Rounded to nearest one-hundredth of an acre-foot.
Table 4, Indoor Residential Water Demand - Plan B provide a summarization of the estimated
indoor water demand for the residential component uses.
51 Travertine Specific Plan Project WSA/WSV
The
a E Group
WATER SUPPLY VERIFICATION (WSV)
Table 4 Indoor Residential Water Demand - Plan B
Y
Planning
Area
Net Area
(Acres)
Estimated
Total Units
Estimated'.
occupants
per home
Indoor Residential Water Demand
Gpd2/
occupant
Gpd2/ Unit
Total Units
Demand (Gpd2)
Annual Demand
(AFY3'4)
2
39.7
60
55
145.20
8,712.00
9.76
3
24.6
92
55
145.20
13,358.40
14.96
4
28.7
83
55
145.20
12,051.60
13.50
5
21.3
44
55
145.20
6,388.80
7.16
6
20.4
90
55
145.20
13,068.00
14.64
7
18.0
49
55
145.20
7,114.80
7.97
8
27.6
75
55
145.20
10,890.00
12.20
9
25.5
113
55
145.20
16,407.60
18.38
10
18.8
89
55
145.20
12,922.80
14.48
11
32.1
98
55
145.20
14,229.60
15.94
12
49.7
113
55
145.20
16,407.60
18.38
13
34.4
53
55
145.20
7,695.60
8.62
14
37.6
69
55
145.20
10,018.80
11.22
15
31.0
72
55
145.20
10,454.40
11.71
16
53.0
100
55
145.20
14,520.00
16.26
Total
1,200
Total
174,240.00
195.17
Source: Altum Group March 2017; Occupancy load of 2.64 persons/dwelling unit der ved from CA Department of Finance Table 2:
E-5 City/County Population and Housing Estimates, 1/1/2017 for the City of La Quinta.
Notes:
1. Estimate based on 55 gpd/person x 2.6452 persons/unit = 145.20 gpd/unit. Project Site located within La Quinta City Limits.
2. Gpd = gallons per day.
3. AFY = acre-feet per year.
4. Rounded to nearest one-hundredth of an acre-foot.
s shown above, indoor residential water demand under Plan A and Plan B would be equal in water
demand (195.17 AFY) due to the even amount of projected dwelling units proposed for each plan.
Water demand for resort uses under Plan A for Planning Areas 2 and 11 are described and calculated in
detail below.
Planning Area 2
Planning Area 2 would involve construction of a 36,036 square foot building for the purpose of a
75 -room Boutique Hotel to be situated among the southwestern backdrop terminus of Coral
Mountain. The Boutique Hotel would include a driveway welcome entrance, a front desk
registration area with meeting lounge, meeting rooms, a restaurant to accommodate a seating
capacity of up to 175 seats, and two resort pools. The intent of the Hotel is to provide a 5 -star
branded, hospitality level of service, and is therefore expected to require approximately 150
onsite employee staff.
52 Travertine Specific Plan Project WSA/WSV
The
as Group
WATER SUPPLY VERIFICATION (WSV)
An 11,654 square foot building to be constructed among the southeastern backdrop terminus of
Coral Mountain would serve as the Spa and Wellness Facility and would provide hospitality
services including, but not limited to, spa facials, pedicures, massages, a hair salon, an indoor
fitness room and an outdoor secluded private pool for spa patrons. Like the proposed Boutique
Hotel, the intent of the Spa and Wellness facility is to also provide a 5 -star branded, hospitality
level of service, and therefore is expected to require approximately 80 onsite employee staff.
The Resort Villas would involve construction of 25 individually -spaced casita designed villas to be
situated along the west side of Coral Mountain and immediately south of levee berm abutting
Guadalupe Wash. Each villa would be approximately 2,100 square feet in size and be individually
separated with its own private walkway entrance, private patio and open space landscaping. The
total indoor area for the Resort Villas at build out would be approximately 52,500 square feet.
As with the proposed Boutique Hotel and Spa and Wellness facility, the Resort Villas would
provide a 5 -star branded hospitality level of service and is expected to require approximately 60
onsite employee staff.
Table 5, Planning Area 2 -Indoor Resort Demand, provides a summary of the estimated indoor
water demand for the Boutique Hotel, the Resort Villas and the Spa and Wellness facility.
Calculations were based on 100 percent annual occupancy for the Boutique Hotel and Resort
Villas and 100 percent annual utilization of the Spa and Wellness facility by guest visitors and
residents. Indoor water demand was also based on service amenity type, restroom utilization
and hospitality cleaning. Water demand benchmark multipliers were derived from the American
Water Works Research Foundation (AWWARF) and are explained in detail for each note
encompassed within the table.
The remainder of this page intentionally left blank
53 Travertine Specific Plan Project WSA/WSV
as
The
AV
Group
WATER SUPPLY VERIFICATION (WSV)
Table 5 Planning Area 2 -Indoor Resort Demand
Proposed
Use
Estimated
Indoor Area
(square feet)
Total
Number of
Rooms'
Maximum
Interior Floor
Space per
Unit
Water
Demand
Multiplier3,4
Daily
Demand
(Gallons/ Day)
Annual
Demand
(Gallons/Year)
Overall Annual
Demand (acre -
feet/year)
Boutique
Hotel
40,058
75
700 sq. ft.
0.26 (gallons
per square foot,
per unit, per
day)
13,650
4,982,250
15.29
Boutique
Hotel2
(175- seat
restaurant)
N/A
N/A
N/A
24.20
(gallons per
seat)
4,235
1,545,775
4.74
Resort Villas
52,500
25
2,100 sq. ft.
0.26 (gallons
per square foot,
per unit, per
day)
13,650
4,982,250
15.29
Spa and
Wellness4
11,654
N/A
N/A
See Note 5
4,528
1,652,793
5.07
Total
104,212
100
36,063
13,163,068
40.40
Source: American Water Works Research Foundation (AWWARF), Commercial and Institutional End Uses of Water (2000).
Notes:
1. Based on an annual occupancy of 100 percent occupancy of total rooms for the Boutique Hotel and Resort Villas.
2. Based on an annual utilization of 100 percent seating attendance for Boutique Hotel Restaurant.
3. Water Demand for hotel rooms and villas based off of a multiplier of 0.26 gallons per square foot, per unit as derived
from Table 2.14, Selected commercial and institutional unit use coefficients, of the Commercial and Institutional End Uses
of Water (2000).
4. Water Demand for hotel restaurant based off of multiplier of 24.20 gallons per seat per day as derived from Table 2.14,
Selected commercial and institutional unit use coefficients, of the Commercial and Institutional End Uses of Water (2000).
5. Water demand multipliers for Spa and Wellness Facility based on the following calculations:
a) Beauty Shop to have six (6) beauty stations. Multiplier of 269 gallons per day, per beauty station, as obtained from
Table 2.14 AWWARF's Commercial and Institutional End Uses of Water (2000).
b) Barber Shop to have two (2) chairs. 54.60 gallons per chair, per day as obtained from Table 2.14 AWWARF's
Commercial and Institutional End Uses of Water (2000).
c) Laundry Room Facility to be based off of a 900 square foot facility to wash and dry towels, sheets from massage
and spa activities. 0.25 gallons per day per square foot of laundry facility area as obtained from Table 2.14
AWWARF's Commercial and Institutional End Uses of Water (2000).
d) Showers based off of two (2) gallon per minute shower head with an average time of 10 minutes spent in shower,
and an average of 60 persons per day in utilizing showers.
e) Toilets based off of 3.5 gallons per flush (gpf) with six (6) toilets proposed for facility and an average of 60 persons
per day in utilizing restrooms. Urinals based off of one (1) gallon per flush (gpf) with two (2) urinals proposed and
an average of 60 persons per day utilizing restrooms. Multipliers for toilets and urinals obtained from Table 2.14
AWWARF's Commercial and Institutional End Uses of Water (2000).
Planning Area 11
Planning Area 11 would involve construction of three buildings totaling approximately 62,282
square feet for the purpose of a golf resort clubhouse and banquet facility. The two-story
54 Travertine Specific Plan Project WSA/WSV
The
as Group
WATER SUPPLY VERIFICATION (WSV)
clubhouse building totaling 15,904 square feet would provide a pro shop, a restaurant with a 100
seat capacity, and a cart barn storage room for the first floor.
The banquet facility would be used for ceremonial festivities and would consist of two buildings
totaling 46,378 square feet. Each building would provide a Grand Ballroom, a Bridal Suite, Groom
Rooms, a Lounge, and Catering sales office and would be able to accommodate up to 350
attendees.
Table 6, Planning Area 11 — Indoor Resort Demand provides a summary of the estimated indoor
water demands for the golf clubhouse, the restaurant and banquet facility components.
Calculations were based on maximum seating capacity, maximum attendance and maximum
utilization for the banquet facility, the golf club house restaurant, the clubhouse locker room (for
golfers) and the number of staff required to accommodate all activities. Water demand
benchmark multipliers were derived from the American Water Works Research Foundation
(AWWARF). As shown in Table 6, the overall total demand will be 24.71.
Table 6 Planning Area 11- Indoor Resort Demand
Proposed
Use
Total
Interior
Floor Space
(square feet)
Total Staff
Required
Total Seating
Capacity
Maximum
Seating
Capacity
Water Demand
Multiplier'
Annual
Demand
(Gallons/Year)
Annual
Demand (acre -
feet/year)
Banquet
Facility'
46,378
1242
7001
7004
24.205
(gpd/seat)
6,183,100
18.98
Golf
Clubhouse
Restaurant'
15,904
183
1003
904
5
(gl��/�®at)
883,300
2.71
Golf
Clubhouse
Locker
Room
2,000
8
N/A
N/A
See Footnote 6
below
985,500
3.02
Total
8,051,900
24.71
Source: American Water Works Research Foundation (AWWARF), Commercial and Institutional End Uses of Water (2000).
Notes:
1. Banquet Facility water demand based on maximum seating capacity and maximum number of events per year (365 days).
2. Total staff required for Banquet Facility based on maximum seating capacity for all events.
3. Total staff required for Golf Clubhouse Restaurant based on maximum seating capacity conditions:
10 servers/waiters, two (2) chefs, two (2) bartenders, two (2) buspersons, two (2) dishwashers. Total = 18 employees.
4. Based on an annual utilization of 100 percent seating attendance.
5. Benchmark water demand multiplier of 24.20 gallons per day, per seat as derived from Table 2.14, Selected commercial
and institutional unit use coefficients, contained in the Commercial and Institutional End Uses of Water (2000) handbook.
6. Water demand for the Golf Club House Locker room based on number of golfer visits per day (60 -golfers). Locker Room
water demand based on number of toilets (6 total), urinals (2 total) and showers (6 total) for Men's and Women's
restrooms. Multipliers of 3.5 gallons per flush (gpf) used for toilets, 2 gpf used for urinals, and an average shower time of
10 minutes with utilization of a 2 gallon/minute showerhead were incorporated into these calculations.
55 Travertine Specific Plan Project WSA/WSV
The
a E Group
WATER SUPPLY VERIFICATION (WSV)
2.3.1 Community Park Clubhouse— Planning Area 8
The Project would include a community clubhouse facility within Planning Area 8 with access
from the east loop connector street. At a minimum of 4,000 square feet, the clubhouse would
provide residents with a meeting room for social events, and a weight room fitness facility with
restrooms to serve both facilities. As shown in Table 7, Community Park Clubhouse, the total
water demand is expected to be 20.22 AFY.
Table 7 Community Park Clubhouse
Proposed Use
Total Interior
Floor Space
(square feet)
Percentage of
Residents
utilizing
Clubhouse/day'
Number of
residents
utilizing
Clubhouse/day'
Annual Demand
(Gallons/Year)3.4
Annual
Demand (acre -
feet/year)
Clubhouse
4,000
15
475
6,588,250
20.22
Source: American Water Works Research Foundation (AWWARF), Commercial and Institutional End Uses of Water (2000).
Notes:
1. gpd = gallons per day.
2. Water demand based on 15 percent of total residents in the community (475 -residents)) in utilizing the Community Park
Clubhouse on a daily basis (365 days) .
3. Restroom water demand based on number of toilets (4 total) for men and women, urinals (2 total) for men, and showers
(4 total) for Men's and Women's restrooms. Multipliers of 3.5 gallons per flush (gpf) used for toilets, 2 gpf used for urinals,
and an average shower time of 10 minutes with utilization of a 2 gallon/minute showerhead were incorporated into these
calculations.
4. Shower Demand based on 15 percent of total residents in the community (475 -residents) in utilizing showers at the
Community Park Clubhouse on a daily basis (365 days).
2.4 Landscape Irrigation and Outdoor Water Demands
The Coachella Valley receives an average annual precipitation of less than 6 inches (15
centimeters), extreme temperatures as high as 120 degrees Fahrenheit, and a wide daily
temperature range. Annual rainfall is normally less than 5.5 inches and several maximum
monthly averages temperature exceed 100 degrees Fahrenheit.
The total potential for evapotranspiration in the Coachella Valley is well above the total rainfall,
and is due to extreme high temperatures, abundant availability of sunlight, and the rain shadow
effect of the San Jacinto and Santa Rosa Mountains. The Coachella Valley rarely experiences a
water surplus condition of precipitation when compared to evapotranspiration. Prime
evapotranspiration sites in the Coachella Valley are well -watered lawns, decorative water
fountains, lakes and golf courses.
The Project landscape demand was calculated using the MAWA equation in CVWD's Model
Landscape Ordinance No. 1302.3. A table of Outdoor Water Demand calculations is included in
Appendix C. This formula ensures that an adequate budget is provided to have a sustainable
landscape that meets the criteria established in CVWD's ordinance and project Master Plan.
MAWA is based on the Project area's referenced evapotranspiration (ETo) amount in inches, the
56 Travertine Specific Plan Project WSA/WSV
The
as Group
WATER SUPPLY VERIFICATION (WSV)
amount of landscaped area (LA) proposed in square feet, a plant factor to irrigation efficiency
ratio, or otherwise known as an Evapotranspiration Adjustment Factor (ETAF) and a Conversion
Factor (KC). When combined the following formula is used to calculate MAWA:
MAWA = ETo x LA x ETAF x KC
or, as used an example for Planning Area 3 from the Proposed Project:
MAWA = 64 x 63,000 x 0.45 x 0.62 = 1,135,642 gallons per year
This calculation determines the upper limit of irrigation water allowed for the Project. To meet
the ETAF of 0.45, a landscape design must use highly water efficient plant material laid out in a
spare manner, and irrigated with efficient irrigation technology including drip emitters and smart
controllers.
Although the landscape design is currently in the developmental stage, this method ensures that a
sufficient budget is provided to have a sustainable landscape that meets the criteria established in
CVWD's ordinance. Therefore, the MAWA equation for the proposed Project was used to
determine Project irrigation demand. Because the Project site is located within two ETo Zones
(Zone 2 and 3), an equation was applied by including the total Project area landscaping falling
within ETo Zone 3 (rate of 64.22 inches or 5.35 feet). The purpose of choosing ETo Zone 3 was
to allow flexibility for development of the Project and to allow changes to landscape areas under a
higher water usage threshold if needed. Thus, the MAWA for the proposed Project uses the ETo
Zone 3 multiplier (5.35 feet) for the total landscaped area falling within ETo Zone 3. The following
demand characteristics apply to the proposed project:
• A demand multiplier of 5.35 acre feet/year/acre applied for landscaped areas under ETo
Zone 3.
• ETAF of 0.45 applied to all non- turf area landscaped Planning Areas with the exception
of an ETAF of 0.82 applied to golf course links (Planning Area 19).
• ETAF of 0.45 applied to irrigated xeriscape landscaping to be interspersed between golf
course links.
• Low demand and moderate demand consisting of desert efficient, drought tolerant trees,
shrubs and ground cover. High demand limited to active turf areas for neighborhood
parks and community parks.
• Residential lots excluding building envelope landscaped with ratio of 60 percent low, 17
to 40 percent moderate and 15 to 20 percent high demand (Note: Lot coverage building
footprint influences available area for moderate and high landscaping).
57 Travertine Specific Plan Project WSA/WSV
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• Right-of-way (ROW) landscaping along roadways for Jefferson Street extension,
southwest and northeast Loop Road connectors to Jefferson Street. ROW landscaped to
100 percent of net land area with ratio of 30 percent low demand and 70 percent
moderate demand.
• Community Slope landscaping between leveled tract lots (See Exhibit 9).
• Community Park landscaped with ratio of 45 percent low, 30 percent moderate, 24
percent high demand (turf).
Adherence to the MAWA requirements as outlined in the CVWD ordinance assures compliance
with CVWD water conservation goals and requirements. The calculated MAWA ETo Zone 3
multiplier used of 5.35 AFY/acre is inclusive of varying types of open space/landscaping uses,
including all outdoor landscaping uses as part of the proposed Project.
As shown in Table 8, Project Outdoor Water Demands — Plan A, estimates were made in the
landscaping analysis for the Project with resort uses.
Temporary Landscape Irrigation
Water demand for temporary irrigation of landscaping to proposed water tank sites and the
proposed service roadway were not included in the overall annual water demand. The intent of
temporary irrigation is for assisting and speeding up the growth and rooting of native planted
species to a point of maturity (2 -years) in order to avoid the potential for erosion created from
graded slopes to tank sites and to the service roadway. Nonetheless, water demand for
temporary landscaped irrigation is included in Tables 8 and 9 for a perspective of the Project's
water demand during the first two years of construction.
As shown in Table 9, Project Outdoor Water Demands — Plan B, estimates were made in the
landscaping analysis for the Project without resort uses.
58 Travertine Specific Plan Project WSA/WSV
as
The
Altum
Group
WATER SUPPLY VERIFICATION (WSV)
Table 8 Project Outdoor Water Demands - Plan A
Planning Area
Landscaped
Irrigated (sq. ft.)2
MAWA
GPY8
Water
Allotment
(afy/acre)'
Annual Demand
(afy)4.6
2
908,293
16,218,480
5.35
49.77
3
63,600
1,135,642
5.35
3.49
4
149,625
2,671,704
5.35
8.20
5
44,179
788,860
5.35
2.42
6
64,200
1,146,355
5.35
3.52
7
89,775
1,603,022
5.35
4.92
8
74,498
1,330,236
5.35
4.08
9
78,000
1,392,768
5.35
4.27
10
61,200
1,092,787
5.35
3.35
11
436,847
7,800,340
5.35
23.94
12
358,035
6,393,073
5.35
19.62
13
214,830
3,836,004
5.35
11.77
14
177,615
3,171,493
5.35
9.73
15
192,615
3,439,333
5.35
10.55
16
295,960
5,284,662
5.35
16.22
Landscaped Slope Areas
Bordering between
Planning Areas
4,791,600
85,558,810
5.35
262.57
Water Tank Landscaping6
Temporary Irrigation
391,011
6,981,875
5.35
21.43'
Golf Course Links'
19 - Irrigated Turf Areas
1,770,7316
57,615,337
5.35
176.81
19 Irrigated Xeriscape
Areas
4,911,373
87,697,476
5.35
269.13
Street Landscaping' J I
NW
Jefferson Street
367,741
6,566,383
5.35
20.15
West Loop Road
143,071
2,554,676
5.35
7.84
East Loop Road
82,663
1,476,031
5.35
4.53
Round -a -bouts
7,034
125,599
5.35
0.39
Median and Parkways
72,385
1,292,507
5.35
3.97
Community Parks3
8
60,984
1,984,273
5.35
6.09
15
60,984
1,984,273
5.35
6.09
Pocket Parks3
Multiple Planning Areas
112,122
3,648,273
5.35
11.20
Total
15,980,971
314, 790,198
966.06
Source: Hermann Design Group 2017.
Notes:
1. Based on Maximum Applied Water Allowance (MAWA), ETo Zone 3 multiplier of 5.35 acre feet/year/acre.
This generation rate is inclusive of the varying types of residential lotting, attached unit planning areas and
open space uses associated with the proposed project.
2. Based on entire available area of landscaping excluding building unit envelope.
3. Based on entire available area of landscaping for parks.
4. Annual Demand rounded to the nearest hundredth of an acre-foot.
59 Travertine Specific Plan Project WSA/WSV
The
a E Group
WATER SUPPLY VERIFICATION (WSV)
5. Option A: With Resort Use component includes Golf Course Links. Of the total 153.4 acres set aside for
Planning Area 19, 1,770,7316 square feet., or 40.65 acres would be irrigated for the golf course links and
with the remaining 4,911,373 square feet, or 112.75 acres to be set aside for irrigated xeriscape landscaped
areas co -mingled in between golf course links.
6. Temporary irrigation for Water Tank Landscaping not included in the overall totals for Irrigated
Landscaping, MAWA and Annual Demand.
7. Street landscaping all located within Planning Area 18: MasterPlan Roadways.
8. ETAF of 0.45 applied to all non- turf area landscaped Planning Areas with the exception of an ETAF of 0.82
applied to golf course links (Planning Area 19), Community Parks (Planning Area 8 and 15) and for pocket
parks in multiple Planning Areas. GPY = Gallons Per Year.
Table 9 Project Outdoor Water Demands - Plan B
Planning Area
Landscaped Irrigated
Acreage (sq. ft.)
MAWA
GPY$
Water Allotment
(afy/acre)1
Annual Demand
(afy)4
2
51,975
928,066
5.35
2.85
3
55,200
985,651
5.35
3.02
4
130,725
2,334,226
5.35
7.16
5
38,115
680,581
5.35
2.09
6
54,000
964,224
5.35
2.96
7
77,175
1,378,037
5.35
4.23
8
64,969
1,160,086
5.35
3.56
9
67,800
1,210,637
5.35
3.72
10
53,400
953,510
5.35
2.93
11
182,850
3,264,970
5.35
10.02
12
311,400
5,560,358
5.35
17.06
13
169,260
3,022,307
5.35
9.28
14
155,205
2,771,340
5.35
8.50
15
180,675
3,226,133
5.35
9.90
16
254,895
4,551,405
5.35
13.97
Landscaped Slope Areas
Bordering between
Planning Areas
4,791,600
85,558,810
5.35
262.57
Water Tank Landscaping6
Temporary Irrigation
391,011
6,981,892
5.35
21.438
Golf Course Linkss
19
N/A6
N/A6
N/A6
0.00
Street Landscaping'
Jefferson Street
367,741
6,566,383
5.35
20.15
West Loop Road
143,071
2,554,676
5.35
7.84
East Loop Road
82,663
1,476,031
5.35
4.53
Round -a -bouts
7,034
125,599
5.35
0.39
Median and Parkways
72,385
1,292,507
5.35
3.97
Community Parks3
8
60,984
1,984,273
5.35
6.09
15
60,984
1,984,273
5.35
6.09
Pocket Parks3
Multiple Planning Areas
112,122
3,648,273
5.35
11.20
Total
7,937,239
145,164,155
445.49
60 Travertine Specific Plan Project WSA/WSV
The
a E Group
WATER SUPPLY VERIFICATION (WSV)
Source: Hermann Design Group 2017.
Notes:
1. Based on MAWA, ETo Zone 3 multiplier of 5.35 acre feet/year/acre. Generation rate is inclusive
of varying types of residential lotting, attached unit planning areas and open space uses for
proposed project. Year.
2. Based on entire available area of landscaping excluding building unit envelope.
3. Based on entire available area of landscaping for parks.
4. Annual Demand rounded to the nearest hundredth of an acre foot.
5. Option B: Without Resort Use component does not include Golf Course Links. In place would
serve as non -irrigated, undeveloped land designated as Open Space /Natural, with an overall
area for Planning Area 19 still totaling 153.4 acres.
6. Temporary irrigation for Water Tank Landscaping not included in the overall totals for Irrigated
Landscaping, MAWA and Annual Demand.
7. Street landscaping all located within Planning Area 18: Master Plan Roadways.
8. ETAF of 0.45 applied to all non- turf area landscaped Planning Areas with the exception of an ETAF of 0.82
applied to Community Parks (Planning Area 8 and 15) and for pocket parks in multiple Planning Areas. GPY
= Gallons Per Year.
2.5 Summary of Project Water Demands
Table 10, Summary of Water Demand Projections — Plan A and Table 11, Summary of Water
Demand Projections— Plan 8, provide the overall projected water demand for all land uses based
on the proposed Project with resort uses (Plan A) and without resort uses (Plan B).
2.6 Project Specific Water Conservation Reduction Measures
CVWD has, and continues to provide to public and private consumers, information necessary to
help conserve water through the use of drought tolerant plant species native to the desert
(xeriscape), efficient irrigation systems, indoor water usage rebates and turf removal rebate
programs. The Project's adherence with the CVWD conservation programs will further enforce
the water conservation ideology in requiring new and existing development within this portion
of the County to implement water efficient measures. As discussed in Section 1.5.1, the 2010
Coachella Valley Water Management Plan (CVWMP) Update identifies conservation measures
with the objective of reducing urban water demand by 20 percent by 2020. CVWD has available
staffing to review all new landscape plan submittals for compliance with CVWD Ordinance
1302.3.
Based on the calculations presented in Table 10 below, the total water demand for the Project
with resort uses is estimated to be approximately 1,225.13 AFY or, 1.43 acre-feet per acre.
Based on the calculations presented in Table 11 below, the total water demand for the Project
without resort uses is estimated to be approximately 639.46 or, 0.72 acre-feet per acre.
61 Travertine Specific Plan Project WSA/WSV
The
a E Group
WATER SUPPLY VERIFICATION (WSV)
Table 10 Summary of Water Demand Projections - Plan A
Planning Area
Outdoor Demand I
Indoor Residential/Resort
Demand 2
Total Annual Demand
(AF)3
2 (Resort)
49.77
40.40
90.17
3
3.49
17.24
20.73
4
8.20
15.45
23.65
5
2.42
8.29
10.72
6
3.52
16.92
20.43
7
4.92
9.27
14.19
8
4.08
13.99
18.07
9
4.27
21.14
25.42
10
3.35
16.59
19.94
11 (Resort)
23.94
24.71
48.65
12
19.62
21.14
40.76
13
11.77
10.90
22.67
14
9.73
12.85
22.58
15
10.55
12.52
23.08
16
16.22
18.87
35.08
Landscaped Slope Areas
Bordering between
Planning Areas
262.57
N/A
262.57
Water Tank Landscaping'
Temporary Irrigation
21.43
N/A
N/A4
Golf Course Links
19 - Irrigated Turf Areas
176.81
N/A
176.81
19 - Irrigated Xeriscape
Areas
269.13
269.13
Street Landscaping'
Jefferson Street
20.15
N/A
20.15
West Loop Road
7.84
N/A
7.84
East Loop Road
4.53
N/A
4.53
Round -a -bouts
0.39
N/A
0.39
Median and Parkways
3.97
N/A
3.97
Community Parks
8 (with clubhouse)
6.09
20.22
26.31
15
6.09
N/A
6.09
Pocket Parks
Multiple Planning Areas
11.20
N/A
11.20
Total Project Demand
944.63
280.50
1,225.13
Source: The Altum Group and Hermann Design Group, 2017.
Notes:
1.
Temporary irrigation for Water Tank Landscaping not included in the overall totals for Irrigated
Landscaping, MAWA and Annual Demand.
2. Street landscaping all located within Planning Area 18: Master Plan Roadways.
3. Annual Demand rounded to the nearest hundredth of an acre-foot.
62 Travertine Specific Plan Project WSA/WSV
The
asAltum
Group
WATER SUPPLY VERIFICATION (WSV)
Table 11 Summary of Water Demand Projections (AF/YR) - Plan B
Planning Area
Outdoor
Demand
Indoor Residential/Resort
Demand
Total Annual Demand
(AF)3
2
2.85
9.76
12.61
3
3.02
14.96
17.99
4
7.16
13.50
20.66
5
2.09
7.16
9.25
6
2.96
14.64
17.60
7
4.23
7.97
12.20
8
3.56
12.20
15.76
9
3.72
18.38
22.09
10
2.93
14.48
17.40
11
10.02
15.94
25.96
12
17.06
18.38
35.44
13
9.28
8.62
17.90
14
8.50
11.22
19.73
15
9.90
11.71
21.61
16
13.97
16.26
30.23
Landscaped Slope Areas
Bordering between Planning Areas
262.57
N/A
262.57
Water Tank Landscaping'
Temporary Irrigation
21.43
N/A
N/A
Golf Course Links'
19
N/A
N/A
N/A
Street Landscaping2
Jefferson Street
20.15
N/A
20.15
West Loop Road
7.84
N/A
7.84
East Loop Road
4.53
N/A
4.53
Round -a -bouts
0.39
N/A
0.39
Median and Parkways
3.97
N/A
3.97
Community Parks
8 (with clubhouse)
6.09
20.22
26.31
15
6.09
N/A
6.09
Pocket Parks
Multiple Planning Areas
11.20
N/A
11.20
Total Project Demand
424.07
215.39
639.46
Source: The Altum Group and Hermann Design Group, 2017.
Notes:
1. Temporary irrigation for Water Tank Landscaping not included in the overall totals for Irrigated Landscaping, MAWA
and Annual Demand.
2. Street landscaping all located within Planning Area 18: MasterPlan Roadways.
3. Annual Demand rounded to the nearest hundredth of an acre-foot.
4. Golf Course Links not proposed in Plan Option B. Area shall remain as undeveloped open space.
63 Travertine Specific Plan Project WSA/WSV
The
a E Altum
Group
WATER SUPPLY VERIFICATION (WSV)
Water Supply Assessment
3.1 General
Having established that the 2010 Coachella Valley Water Management Plan (CVWMP) Update,
the 2015 Urban Water Management Plan (UWMP), Senate Bill 1262 (SB 1262) and the Indio
Subbasin Alternative Groundwater Sustainability Plan (GSP) are applicable to this Project, the
next requirement of a Water Supply Assessment/Water Supply Verification (WSA/WSV) is to
identify and describe the water supply sources available to the Coachella Valley Water District
(CVWD) that will serve the proposed Project. Water Code Section 10910(d) requires a WSA/WSV
to include identification of any existing water supply: groundwater; water rights; water service
contracts; State Water Project (SWP) Table A amounts; and alternate sources (recycled water and
desalinated drain water), relevant to the identified water supply for the proposed Project. The
WSA/WSV must also include a description of the quantities of water received in prior years by the
Public Water System (PWS). According to the 2015 UWMP, the groundwater basin and other
sources of supply are adequate for an average year, single dry year, and multiple dry years for a
twenty-year period.
3.2 Identification of Water Sources
The primary source of water supply for this Project is groundwater from which the Project will
draw potable water from groundwater wells. Currently, the number of groundwater wells
needed to adequately supply the Project is currently under consideration by CVWD and will be
determined upon analysis of this WSA/WSV.
The groundwater basin is recharged by Colorado River water, SWP supplies, natural runoff and
potentially desalinated agricultural drain water before 2035. Colorado River water is also
available for potential direct domestic use if treated. Colorado River water via the Coachella
Canal supplies water for irrigation of the eastern Coachella Valley, for groundwater recharge, and
for in -lieu recharge in the mid -Coachella Valley via the Mid -Valley Pipeline. The Project lies within
the Improvement District No. 1 (ID -1) Boundary, a portion of CVWD's service area.
3.3 Analysis of Water Supplies and Demand
3.3.1 Groundwater
Since the early part of the 20th century, the Coachella Valley has been dependent primarily on
groundwater as a source of domestic water supply. Groundwater, to be supplied to the Project, is
also used to supply water for crop irrigation, fish farms, duck clubs, golf courses, greenhouses, and
industrial uses in the Coachella Valley.
64 Travertine Specific Plan Project WSA/WSV
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a E Group
WATER SUPPLY VERIFICATION (WSV)
Water Code Section 10910(f) requires that additional information be included in the analysis
when a groundwater basin is cited as the water supply source for a project. Information should
include: a description of the basin; the rights of the PWS to use the basin; the overdraft status of
the basin; any past or planned overdraft mitigation efforts; historical use of the basin by the PWS;
projected use of the basin by the project; and a sufficiency analysis of the basin that is to supply
the project.
Water Code Section 10910(f) was also amended by SB 1262 (Pavley) to require that where
projects would be drawing water from basins designated as high or medium priority, a WSA/WSV
shall provide information regarding the following:
• Whether the groundwater basin has been identified as being subject to critical conditions
of overdraft.
• If a groundwater sustainability agency has adopted a groundwater sustainability plan or
has an approved alternative.
• A copy of the alternative plan.
3.4 Description of the Aquifer
Groundwater is the principal source of municipal water supply in the Coachella Valley. CVWD
serves domestic water to most of the developed portions of the Coachella Valley and along the
approximately two thirds of both sides of the Salton Sea in Imperial Valley. CVWD obtains water
from both the Whitewater River Subbasin and the Mission Creek Subbasin. A common
groundwater source, the Whitewater River Subbasin, is shared by CVWD, Desert Water Agency
(DWA), the Cities of Indio and Coachella, Myoma Dunes Water Company, and numerous private
groundwater users. California Department of Water Resources (DWR) Bulletin 118 refers to the
Whitewater River Subbasin as the Indio Subbasin. It is referred to as the Whitewater River
Subbasin throughout this document.
The Coachella Valley Groundwater Basin, as described by the DWR, is bounded on the north and
east by non -water bearing crystalline rocks of the San Bernardino and Little San Bernardino
Mountains to the northeast, and on the southwest by the crystalline rocks of the Santa Rosa and
San Jacinto Mountains. At the west end of the San Gorgonio Pass, between the Cities of
Beaumont and Banning, the basin boundary is defined by a surface drainage divide separating
the Coachella Valley Groundwater Basin from the Beaumont Groundwater Basin of the Upper
Santa Ana drainage area.
The Coachella Valley Groundwater Basin can be described as a giant tilted bathtub full of sand,
with the high end at the northwest edge of the Coachella Valley near the community of
Whitewater, and the low end at the Salton Sea. The aquifer underlies the Cities of Palm Springs,
65 Travertine Specific Plan Project WSA/WSV
The
a E Group
WATER SUPPLY VERIFICATION (WSV)
Cathedral City, Rancho Mirage, Palm Desert, Indian Wells, La Quinta, Indio, and Coachella, and
the unincorporated communities of Thousand Palms, Thermal, Bermuda Dunes, Oasis, and
Mecca.
The subbasins present in the Coachella Valley are the Mission Creek, Desert Hot Springs, Garnet
Hill, and Whitewater River Subbasins. The Whitewater River Subbasin includes four subareas:
Palm Springs, Thermal, Thousand Palms, and Oasis. The Palm Springs Subarea is the forebay, or
main area of recharge to the subbasin, and the Thermal Subarea comprises the pressurized, or
confined, area within the subbasin (see Exhibit 6, in the Executive Summary). The other two
subareas are peripheral areas having unconfined groundwater conditions. The subbasins with
their groundwater storage reservoirs are defined without regard to water quantity or quality.
They delineate areas underlain by geologic formations, which readily yield the stored water
through water wells and offer natural reservoirs for the regulation of water supplies.
The Whitewater River Subbasin comprises a major portion of the Coachella Valley floor and
encompasses approximately 400 square miles. The historical fluctuations of water levels within
the Whitewater River Subbasin indicated a steady decline in levels throughout the subbasin prior
to 1949. Post 1949 levels in the lower Thermal Subarea (south of Point Happy, in La Quinta),
which is where imported Colorado River water is used for crop irrigation, rose sharply. However,
water levels continued to decline elsewhere in the subbasin. With the use of Colorado River
water from the Coachella Branch of the All American Canal, the demand on the groundwater
basin declined in the eastern Coachella Valley (generally southeast of Washington Street and
Point Happy). Water levels in the deeper aquifers rose from 1950 to 1980. However, afterwards
these levels began to decline again due to increasing urbanization and groundwater usage. The
2014 and 2017 Status Reports provided an analysis of progress in eliminating the overdraft and
explained that although groundwater levels are declining in the Palm Desert and Rancho Mirage
area, groundwater levels are increasing in the eastern Coachella Valley and in the vicinity of Palm
Springs. The report further discussed how the 10 -year period from 2003 to 2013 involved no
occurrence of overdraft, and how it actually resulted with slightly more water being recharged
back into the aquifer than what was pumped and lost through flows to the Salton Sea.
As shown in Exhibit 7, the Whitewater River Subbasin is located northwest of the Salton Sea and
receives low precipitation, averaging about 6 inches per year, and a wide range of temperatures.
The Banning fault bounds the subbasin on the north and the semi -permeable rocks of the Indio
Hills mark the northeast boundary. Impermeable rocks of the San Jacinto and Santa Rosa
Mountains bound the subbasin on the west and south. A bedrock constriction separates the
Whitewater River Subbasin from the San Gorgonio Pass Subbasin on the northwest. The Salton
Sea is the eastern boundary and also the subbasin's primary discharge area. A low drainage
divide forms a short boundary with the West Salton Sea Groundwater Basin in the southeast.
66 Travertine Specific Plan Project WSA/WSV
The
as Group
WATER SUPPLY VERIFICATION (WSV)
In the western portion of the Whitewater River Subbasin, groundwater is unconfined, whereas
to the south and southeast, groundwater is mostly confined except on the edges of the subbasin
where unconfined conditions are found. Depth to groundwater varies widely in the southeastern
part of the subbasin. Some wells near the Salton Sea historically delivered artesian flow, and
returns to artesian flow output have occurred in recent years.
As shown in Table 12, Groundwater Storage Coachella Valley Groundwater Basin, DWR estimated
that the Coachella Valley Groundwater Basin contained a total of approximately 39.2 million acre-
feet (AF) of water in the first 1,000 feet below the ground surface, much of which originated from
runoff from adjacent mountains. However, the amount of water in the aquifer has decreased
over the years due to pumping to serve urban, rural and agricultural development in the
Coachella Valley, which has withdrawn water from the aquifer at a rate faster than its natural
rate of recharge.
Table 12 Groundwater Storage Coachella Valley Groundwater Basin
Subbasin
Subarea
Storage (AF)
San Gorgonio Pass
2,700,000
Mission Creek
2,600,000
Desert Hot Springs
4,100,000
Garnet Hill
1,000,000
Whitewater River
Palm Springs
4,600,000
Thousand Palms
1,800,000
Oasis
3,000,000
Thermal
19,400,000
Total
39,200,000
Source: California Department of Water Resources, 1964.
Although groundwater levels have been declining throughout most of the subbasins since 1945,
water levels in the southeastern portion of the Coachella Valley had risen until the early 1980s
because of the use of imported water from the Coachella Branch of the All American Canal and
the resulting decreased pumping in that area. The rate of groundwater level decline increased
from the early 1980s until about 2010 due to increased urbanization and increased groundwater
use by domestic water purveyors, local farmers, golf courses and fish farms. Since 2010,
groundwater levels in the southeastern portion of the Coachella Valley have risen as a result of
reduced pumping in the eastern Coachella Valley combined with recharge of Colorado River
water at the Thomas E. Levy (TEL) Groundwater Replenishment Facility (GRF).
The historic decline in the Whitewater River Subbasin led to a determination by CVWD and DWA
that a management program would be needed in order to stabilize water levels and prevent
other adverse effects including water quality degradation and land subsidence. CVWD's East and
West Whitewater River Subbasin Groundwater Replenishment Programs are reducing declining
water levels in this subbasin. Groundwater recharge in the West Whitewater River Subbasin Area
67 Travertine Specific Plan Project WSA/WSV
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of Benefit (AOB) began in 1973 with results in recharge being seen in recent groundwater level
measurements.
As presented in the 2010 CVWMP Update, groundwater production within the West Whitewater
River Subbasin AOB was estimated to be 208,439 AF during 1999. The reported production for
2014 was 174,187 AF, and for 2015 was 147,459 AF. Groundwater production within the East
Whitewater River Subbasin AOB was estimated to be 168,300 AF during 1999. The reported
production for 2014 was 123,465 AF and for 2015 was 113,706 AF.
Surface runoff and subsurface inflow are significant sources of recharge for the Whitewater River
Subbasin with the average historical natural recharge at approximately 49,000 AFY1. In addition,
the Whitewater River GRF northwest of Palm Springs receives SWP exchange water through the
Colorado River Aqueduct water, which has a maximum capacity of 300,000 AFY2.
Although the Whitewater River GRF recharged only 35,699 AF in 2016, annual recharge has
averaged over 66,000 acre-feet per year (AFY) since 1973.
As mentioned above, a direct recharge program is currently operating in the East Whitewater
River Subbasin AOB3. Colorado River water is conveyed to the subbasin through the Coachella
Branch of the All-American Canal, which is used primarily for agricultural irrigation use. The
Coachella Canal also delivers supplies to the TEL GRF located in the southwestern part of the
subbasin.
The TEL GRF is located one mile south of Lake Cahuilla and upslope of Bureau of Reclamation
Dike 4, a major flood control dike, near Avenue 62 and Madison Street. This location is ideally
suited for a large-scale recharge facility for the Thermal Subarea, due to its proximity to Lake
Cahuilla and its relative freedom from the aquitard (clay layer), which is a barrier to groundwater
recharge.
Since 1997, 271,289 AF of water has been recharged at the TEL GRF. The CVWMP indicates this
facility should be able to recharge approximately 40,000 AFY. CVWD recharged 36,030 AF at this
location in 2014, and 37,262 AF in 2015, and completed construction of a pilot recharge facility
and several monitoring wells located at the base of the Martinez Canyon alluvial fan in March
2005. This facility is now out of service, but was designed to recharge approximately 4,000 AFY
and received 665 AF of recharge water in 2012, and 441 AF in 2013. The annual amounts of water
delivered for recharge over a 40 year period are shown in Table 13, Colorado River Water
1 Coachella Valley Water District, 2010 CVWMP Update (December 2010).
2 Department of Water Resources, California's Groundwater, Bulletin 118, Coachella Valley Groundwater Basin, Whitewater
Subbasin, (February 27, 2004).
3 Coachella Valley Water District Engineer's Report on Water Supply and Replenishment Assessment, Upper White Water
River Subbasin Area of Benefit 2013-2014, 2014-2015.
68 Travertine Specific Plan Project WSA/WSV
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Delivered to the Thomas E. Levy Groundwater Replenishment Facilities, East Whitewater River
Subbasin Area of Benefit.
Table 13 Colorado River Water Delivered to the Thomas E. Levy Groundwater
Replenishment Facility, East Whitewater River Subbasin Area Of Benefit
Year
Recharge
Delivery (AF/Y)
Year
Recharge
Delivery (AF/Y)
Year
Recharge
Delivery (AF/Y)
1973
7,475
1988
1,096
2003
902
1974
15,396
1989
12,478
2004
13,244
1975
20,126
1990
31,721
2005
165,554
1976
13,206
1991
14
2006
98,959
1977
0
1992
40,870
2007
16,009
1978
0
1993
60,153
2008
8,008
1979
25,192
1994
36,736
2009
57,024
1980
26,341
1995
61,318
2010
228,330
1981
35,251
1996
138,266
2011
232,214
1982
27,020
1997
113,677
2012
257,267
1983
53,732
1998
132,455
2013
26,620
1984
83,708
1999
90,601
2014
3,533
1985
251,994
2000
72,450
2015
865
1986
298,201
2001
707
2016
35,699
1987
104,334
2002
33,435
TOTAL
2,932,188
Source: Coachella Valley Water District Engineer's Report on Water Supply and Replenishment
Assessment, West Whitewater/Indio Subbasin Area of Benefit 2017-2018 (April 2017).
Note:
1. Delivered water quantities vary as a result of varying SWP delivery capability drought and
advance deliveries associated with the exchange agreement.
3.4.1 Aquifer Adjudication
The groundwater supply of the Whitewater River Subbasin has not been adjudicated. CVWD
shares a common groundwater source with other Public Water Suppliers, including DWA, the City
of Coachella, the City of Indio, and the Myoma Dunes Mutual Water Company. Other
groundwater users include some individual residents mostly in rural areas, farmers, golf courses,
businesses, and commercial facilities. DWA and CVWD both operate groundwater replenishment
programs whereby groundwater pumpers, (other than minimal pumpers), pay a per acre-foot
charge that is used to pay the cost of importing water to recharge and the aquifer.
69 Travertine Specific Plan Project WSA/WSV
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3,4.2 Status of the Aquifer
In accordance with the Sustainable Groundwater Management Act (SGMA), DWR has determined
the Whitewater River Subbasin to be a medium priority groundwater basin which is not in critical
overdraft.
The groundwater supply of the Whitewater River Subbasin consists of a combination of natural
runoff, inflows from adjacent basins, returns from groundwater use, and imported water use.
The supply is supplemented with artificial recharge using imported SWP Exchange and Colorado
River water. The long-term average of natural inflow from mountain -front runoff is about 46,000
AFY. Runoff varies from about 8,000 AFY in very dry years to over 200,000 AFY in extremely wet
years. For a ten-year period from 2000 through 2009, natural inflow from mountain -front runoff
was below normal, averaging about 29,000 AFY.
Subsurface inflow from adjacent groundwater basins averages about 11,000 AFY and is relatively
consistent from year-to-year. Returns from use vary with water demands. For the 2000 through
2009 period, returns from use are estimated to be on average about 240,000 AFY. During this
same period, about 51,000 AFY of imported water was recharged into the basin. Total inflows
are estimated to be approximately 331,000 AFY.
Outflows from the basin consist of pumping, flows to the agricultural drainage system,
evapotranspiration by native vegetation and subsurface outflow to the Salton Sea. For the 2000
to 2009 period, groundwater pumping averaged about 389,000 AFY. Drain flows are estimated
by about 48,000 AFY, while evapotranspiration and subsurface outflow averaged about 4,000
AFY. The total basin outflows for this period averaged at 441,000 AFY and the average net outflow
from storage for this period was 110,000 AFY.
DWR Bulletin 108 (1964) and Bulletin 118 (2003) are the most current bulletins published by DWR
that characterize the condition of the aquifer as a whole. In Bulletin 108, DWR noted that the
amount of usable supply in the over -drafted aquifer was decreasing. CVWD estimates the annual
overdraft in its Engineer's Reports on Water Supply and Replenishment Assessment. Over the last
ten-year period, urban per capita water use has decreased as a result of ongoing conservation
programs. In addition, imported water supplies have increased. As a result, the 2014 CVWMP
Status Report shows that overdraft conditions did not occur between 2003 and 2013, and with
continued implementation of the 2010 CVWMP Update Programs, overdraft is anticipated to be
eliminated within the next ten years. The 2017 CVWMP Status Report confirmed this estimate.
The historical overdraft condition in the Coachella Valley has caused groundwater levels to
decrease in portions of the Coachella Valley particularly in the Mid -Valley region of Rancho
Mirage, Palm Desert, and Indian Wells, and has raised concerns about water quality degradation
and land subsidence. Groundwater overdraft is manifested not only as a prolonged decline in
groundwater storage, but also through secondary adverse effects including decreased well yields,
70 Travertine Specific Plan Project WSA/WSV
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increased energy costs, water quality degradation and land subsidence. Groundwater levels in
the western Coachella Valley near Palm Springs have also historically decreased. However, in the
last ten years groundwater level increases have been seen in the Palm Springs area where
artificial recharge has successfully raised water levels.
The effectiveness of the Groundwater Replenishment Programs have been demonstrated by
rising water levels in the Palm Springs area, and by slowing water level declines in the Mid -Valley
portion of the Whitewater River Subbasin.
3.5 Overdraft Mitigation Efforts
3,5.1 Coachella Valley Water Management Plan Update
CVWD maintains water management policies within its 2010 CVWMP Update (January 2012) to
comprehensively protect and augment the groundwater supply. As discussed in the 2010
CVWMP Update, CVWD is reducing reliance on groundwater sources by fully utilizing available
Colorado River water, SWP Exchange water and recycled water supplies. In addition, CVWD
implements source substitution and conservation measures to reduce demands on the aquifer.
The goal is to reach a 20 percent reduction in the overall water demand by 2020, pursuant to
SBx7-7. CVWD anticipates this water use reduction level will be permanent. In compliance with
SGMA, CVWD has submitted the 2010 CVWMP update to DWR for approval as its Alternative
GSP.
3.5.2 CVWD Landscape Ordinance
CVWD's Landscape Ordinance 1302.3, revised in August 2017 in compliance with the State of
California (State) drought revisions, requires a series of reduction methods, including
requirements that new developments install weather -based irrigation controllers that
automatically adjust water allocation. Additional requirements include setbacks of spray emitters
from impervious surfaces, as well as use of porous rock and gravel buffers between grass and
curbs to eliminate run-off onto streets. With the exception of turf, all landscaping, including
groundcover and shrubbery, must be irrigated with a drip system. Also, the maximum water
allowance for landscaped areas through CVWD's service area has been reduced. This new
reduction goal requires that developers maximize the use of native and other drought -tolerant
landscape materials, and minimize use of more water -intensive landscape features, including turf
and fountains.
3.5.3 Source Substitution
Source substitution is the delivery of an alternate source of water to users currently pumping
groundwater. The substitution of an alternate water source reduces groundwater extraction and
allows the groundwater to remain in storage, thus reducing overdraft. Alternative sources of
water include municipal recycled water from Water Reclamation Plants (WRP)-7 and WRP-10,
71 Travertine Specific Plan Project WSA/WSV
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and the City of Palm Springs Wastewater Treatment Plant; Colorado River Water, desalinated
agricultural drain water, and re -use of water used in aquaculture. Source substitution projects
include the following:
• Conversion of existing and future golf courses in the eastern Coachella Valley from
groundwater to Colorado River water;
• Conversion of existing and future golf courses in the western Coachella Valley from
groundwater to recycled water and/or Colorado River water via the Mid -Valley
Pipeline;
• Conversion of agricultural irrigation from groundwater to Colorado River water, in
both the Oasis and Mecca Subareas; and
• Conversion of some municipal use from groundwater to treated Colorado River
water.
Examples of effective alternative source substitute efforts include the following:
• CVWD has a non -potable water system that delivers treated recycled water from
water reclamation plants, blends it with canal water and delivers it to golf courses,
schools, and open spaces for irrigation. Approximately 8,750 AF of recycled water
was delivered in 2015;
• CVWD has completed construction of a 54 -inch diameter pipeline to deliver
Colorado River water to the Mid -Valley area for use with CVWD's recycled water
for golf course and open space irrigation. Over 50 golf courses within CVWD's
service area now use either recycled or canal water, or a combination of both. This
reduces pumping from the groundwater;
• CVWD has secured rights to the Colorado River and participated in the
construction of the All-American Canal and the Coachella Branch of the All-
American Canal. Beginning in the late 1940's, CVWD worked with the U.S. Bureau
of Reclamation and constructed a distribution system to deliver Colorado River
water to the farms in the eastern Coachella Valley. This system delivered 245,894
AF of Colorado River water in 2006, and increased deliveries to approximately
342,000 AF in 2015;
• CVWD recharges the Coachella Valley Groundwater Basin with Colorado River
water at three locations. The largest recharge program is operated at the
Whitewater River GRF. The TEL GRF recharges up to 40,000 AFY in the eastern
Coachella Valley;
72 Travertine Specific Plan Project WSA/WSV
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• CVWD has secured rights to SWP water and negotiated exchange and advanced
delivery agreements with the Metropolitan Water District of Southern California
(MWD) to exchange CVWD's SWP water for MWD's Colorado River water source.
The SWP exchange water is used to recharge the aquifer in the western Coachella
Valley. This recharge program was started in 1973 and has replenished the aquifer
with almost three million AF of water;
• CVWD plans to utilize treated agricultural drainage water for irrigation purposes.
A desalination pilot study was completed in 2007;
• CVWD has worked with an aquaculture farm and developed water efficiency
programs that include water treatment and reuse; and
• CVWD intends to implement expansion of the Oasis Subarea irrigation system.
This project will reduce groundwater pumping by extending Colorado River water
delivery to the Oasis Slope.
3.5.4 CVWD's Conservation Programs
CVWD continues to work with the cities in its service area to limit the amount of water that is
used for outdoor landscaping, and maintains an ongoing turf rebate program (when funds are
available) to encourage homeowners to replace turf areas with desert -friendly landscaping. As a
result of the adoption of Statewide indoor water conservation measures requiring low flush
toilets, shower and faucet flow restrictors, and other devices, the amount of water used inside
homes has been significantly reduced.
CVWD adopted water budget -based tiered rates in 2010 to discourage excessive water use and
implemented a 20 percent urban water use reduction target by 2020. The most current CVWD
budget -based tiered rates were adopted in July 2016, under CVWD Ordinance 1430. CVWD is
also working with the golf course industry to reduce water use at local courses. In 2014, CVWD
began a partnership with the Southern California Golf Association and formed the Golf and Water
Task Force to reduce overall golf course water use by 10 percent. Key activities being
implemented are the establishment of water budgets to limit golf course groundwater pumping
and a region wide golf course turf reduction program. With the large number of new communities
constructed, these conservation programs have reduced impacts of new development on the
aquifer.
Travertine Specific Plan
Development of the Travertine Specific Plan (Project) will be required to implement CVWD's
conservation measures in order to assure the most efficient use of water resources and to meet
73 Travertine Specific Plan Project WSA/WSV
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WATER SUPPLY VERIFICATION (WSV)
and maintain the 2020 water conservation goals, or goals throughout the life of the Project. In
addition, the Project will strictly adhere to the provisions in CVWD's Landscape Ordinance.
3.6 Historical Groundwater Use
CVWD's annual Engineer's Report on Water Supply and Replenishment Assessment 2016-2017,
reviews the historical use of groundwater in the Coachella Valley. In 1936, groundwater use
totaled 92,400 AFY and increased steadily to about 376,000 in 1999, and 398,510 AF in 2007.
Total groundwater use, including private pumping, has dropped off slightly since 2007, due to a
combination of water conservation efforts, source substitution projects and the effects of the
ongoing economic recession. In 2014, as a continued result of conservation and source
substitution programs, total groundwater use dropped even further to approximately 297,652
AF. In 2015, mostly due to mandatory drought reductions, total groundwater use dropped even
further to 261,165 AF. These reductions represent 25 and 34 percent reductions in reported
Coachella Valley groundwater pumping respectively since 2007.
3.7 Groundwater Sufficiency Analysis
The 2015 UWMP reports CVWD's actual service area urban water demand at 92,974 AF in 2015.
Projected urban water demand in the 2015 UWMP for the year 2040 is anticipated to be 194,300
AF.
Total build -out water demand under the Plan A Option is approximately 1,255.13 acre-feet per
year (AFY) or, 1.43 acre-feet (AF) per acre, which represents approximately 0.64 percent of the
total water supply number (194,300 AFY) for 2035.
Total build -out water demand under the Plan B Option is approximately 639.46 acre-feet per year
(AFY) or, 0.72 AF per acre, which represents approximately 0.32 percent of the total water supply
number (194,300 AFY) for 2035.
With almost 30 million AF of combined storage followed by groundwater management planning
adopted in the 2015 UWMP and 2010 CVWMP Update, the aquifer has sufficient available water
to supply the proposed Project and other present and anticipated needs for normal year, as well
as one or more multiple dry years, over the next 20 years.
3.8 Additional Water Sources
Groundwater will provide the primary water supply for the proposed Project. This WSA/WSV
focuses on the adequacy of groundwater to meet the water demands of the Project. Additional
water sources are considered as a supplement to groundwater in that they are used to recharge
the aquifer, serve as a source substitution for groundwater, or are used for irrigation in other
locations in the subbasin.
74 Travertine Specific Plan Project WSA/WSV
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The proposed Project would be able utilize recycled water on site to supplement non -potable
water demands.
3.8.1 Colorado River Water
The Coachella Canal is a branch of the All-American Canal that brings Colorado River water into
the Imperial and Coachella Valleys. Under the 1931 California Seven Party Agreement, CVWD has
water rights to Colorado River water as part of the first 3.85 million AF allocated to California.
CVWD is in the third priority position along with the Imperial Irrigation District (IID). This priority is
ahead of the 550,000 AF allocation to MWD, which has the lowest priority of the California Seven
Parties.
California's Colorado River supply is protected by the 1968 Colorado River Basin Project Act, such
that the Colorado River supplies to Arizona and Nevada after 1968 shall be reduced to zero before
California's supply will be reduced below 4.4 million AF in any year. It is estimated that this
reduction is about 1.5 million AF. This reduction, together with the reduction by California
agencies with lower priorities than CVWD, results in a reduction in excess of 2 million AF in
Colorado River water available to the Lower Basin States before the Colorado River supply
available to CVWD is impacted. This assumes that the California agricultural agencies with rights
to Colorado River water are using less than 3.85 million AF.
Historically, CVWD has received approximately 330,000 AFY, the base entitlement, of Priority 3a
Colorado River water. Table 14, Annual CVWD Colorado River Diversions at Imperial Dam (after
measured returns), shows the diversions of Colorado River water after measured returns at
Imperial Dam to CVWD for the period from 1964 through 2015. The 2003 Quantification
Settlement Agreement (QSA), involving several of the California Colorado River contactors,
provides contractual obligation for the supply to CVWD. A number of lawsuits have unsuccessfully
challenged the QSA agreements and transfers in State and federal courts, and thus maintained the
validity of the QSA has been upheld.
The 2003 QSA was entered into and between CVWD, IID and the San Diego County Water
Authority (SDCWA). The QSA quantifies distribution allotments of Colorado River water rights in
California, including CVWD's Colorado River Rights, for the next 75 years. The agreements provide
for additional transfer of Colorado River allocations to CVWD from the IID and MWD. Under the
QSA as shown in Table 15, Colorado River Water Budget under the Quantification Settlement
Agreement, CVWD will receive up to 459,000 AFY of Colorado River water.
Water from the Coachella Canal provides a significant supply source for the eastern Coachella
Valley. In 1999, the Coachella Canal supplied over 60 percent of the water used in the eastern
Coachella Valley, but provided less than 1 percent of the water supply to the western Coachella
Valley. Most of the canal water was used for crop irrigation in the eastern Coachella Valley.
75 Travertine Specific Plan Project WSA/WSV
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WATER SUPPLY VERIFICATION (WSV)
Table 14 Annual CVWD Colorado River Diversions
at Imperial Dam (after measured returns)
Year
Diversion Volume (AF)
Year
Diversion Volume (AF)
1964
526,417
1990
369,685
1965
524,686
1991
317,563
1966
489,429
1992
309,367
1967
465,053
1993
318,990
1968
478,583
1994
326,102
1969
495,082
1995
326,697
1970
449,263
1996
331,473
1971
470,683
1997
338,466
1972
511,476
1998
337,466
1973
522,356
1999
333,810
1974
558,864
2000
342,871
1975
570,987
2001
329,367
1976
524,800
2002
331,107
1977
508,635
2003
296,808
1978
509,491
2004
318,616
1979
530,733
2005
304,769
1980
531,791
2006
329,322
1981
452,260
2007
311,971
1982
424,868
2008
299,064
1983
362,266
2009
308560
1984
355,789
2010
306141
1985
337,002
2011
309348
1986
339,702
2012
329,576
1987
322,625
2013
331,137
1988
331,821
2014
349,372
1989
359,419
2015
342,068
2016
356,358
Source:
United States Bureau of Reclamatbn Report for Colorado River Accounting and
Water Use Report for calendar year 2016, May 2017.
Note: Records of releases of water through regulatory structures in accordance with Article
V(A) of the Decree of the Supreme Court of the United States in Arizona v. California dated
March 9, 1964.
In 1995, CVWD began operating the Dike No. 4 pilot recharge facility in La Quinta. As discussed
in Section 3.4, this facility successfully demonstrated the adequacy of this site to recharge the
aquifer. The Dike No. 4 site was expanded in 2009, put into full operation, and was renamed the
Thomas E. Levy (TEL) Groundwater Replenishment Facility (GRF). Future development and
associated increases in water demand, as well as quality concerns, are expected to increase use
of Colorado River water for domestic purposes. Determining the best way to treat this water in
order to substitute for and decrease the area's dependency on groundwater is an important
objective of the 2010 CVWMP Update, and the 2015 UWMP. The 2010 CVWMP Update calls for
76 Travertine Specific Plan Project WSA/WSV
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the annual treatment and distribution of as much as 62,000 AF of Colorado River water for
domestic use.
Table 15 Colorado River Water Budget under the Quantification Settlement Agreement
Component
2015 Amount (AFY)
2026-2047 Amount (AFY)
Base Entitlement
330,000
330,000
1988 Metropolitan/IID1 Approval Agreement
20,000
20,000
Coachella Canal Lining (to SDCWA)2
-26,000
-26,000
To Miscellaneous/Indian PPRs3
-3,000
-3,000
IID/CVWD First Transfer
36,000
50,000
IID/CVWD Second Transfer
0
53,000
Metropolitan/SWP4 Transfer
35,000
35,000
CVWD Diversion at Imperial Dam (QSA)
392,000
459,000
Less Conveyance Losses3
-14,000
-14,000
Agreed Upon Deliveries to CVWD
378,000
445,000
Source: CVWD 2015 UWMP Table 6-3.
Notes:
1. Imperial Irrigation District (IID)
2. San Diego County Water Authority (SDCWA)
3. Indian Present Perfected Rights (PPRs) State Water Project (SWP)
4. Assumed total losses after completion of canal lining projects.
3.8.2 State Water Project Water
CVWD and DWA are SWP contractors for the Whitewater River Subbasin. The SWP includes 660
miles of aqueduct and conveyance facilities extending from Lake Oroville (near Sacramento) in
the north to Lake Perris (near Riverside) in the south. The SWP has contracts to deliver 4.1 million
AFY to 29 contracting agencies. CVWD's original SWP water right (Table A amount) was 23,100
AFY and DWA's original SWP Table A amount was 38,100 AFY for a combined Table A amount of
61,200 AFY. In 2004, CVWD purchased an additional 9,900 AFY of SWP water from the Tulare
Lake Basin Water Storage District located in the central San Joaquin Valley, which brought CVWD's
SWP allotment up to 33,000 AFY.
In addition, CVWD and DWA have also negotiated an exchange agreement with MWD for 100,000
AFY of SWP Table A amount. MWD has permanently transferred 88,100 AFY and 11,900 AFY of
its SWP Table A amounts annually to CVWD and DWA, respectively. This exchange agreement
increases the total SWP Table A amount for CVWD and DWA to 178,100 AFY, with CVWD's portion
equal to 126,350 AFY. This agreement provides that CVWD and DWA generally receive this
(exchange) water from the SWP during wet years, which allows the two agencies to recharge the
77 Travertine Specific Plan Project WSA/WSV
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groundwater basin and operate a conjunctive use program, storing water in wet years and
pumping the groundwater basin in dry years.
In 2007, CVWD and DWA made a second purchase of SWP water from the Tulare Lake Basin
Water Storage District. CVWD purchased 5,250 AFY and DWA purchased 1,750 AFY. In 2007,
CVWD and DWA completed the transfer of 12,000 AFY and 4,000 AFY, respectively, from the
Berrenda Mesa Water District (southern San Joaquin Valley) for a total SWP Table A amount of
16,000 AFY. Therefore, the total SWP Table A amount for CVWD and DWA is 194,100 AFY, with
CVWD's portion equal to 138,350 AFY. Table 16, State Water Project Water Sources, summarizes
CVWD and DWA total allocations of SWP Table A water to be delivered when available.
Table 16 State Water Project Water Sources
Source: 2010 Coachella Valley Water Management Plan Update, Table 4-4.
SWP contractors make annual requests to DWR for water allocations and DWR makes an initial
SWP Table A allocation for planning purposes, typically in the last month before the next water
delivery year. Throughout the year, as additional information regarding water availability
becomes available to DWR, its allocation/delivery estimates are updated. Table 17, Department
of Water Resources State Water Project Table A Water Allocations, outlines the historic reliability
of SWP deliveries, including their initial and final allocations.
78 Travertine Specific Plan Project WSA/WSV
Original SWP
Table A
Tulare Lake
Basin 2004
Transfer
Metropolitan
Water District
2003 Transfer
Tulare Lake
Basin 2007
Transfer
Berrenda
Mesa 2007
Transfer
Total
CVWD
23,100
9,900
88,100
5,250
12,000
138,350
DWA
38,100
11,900
1,750
4,000
55,750
Total
61,200
9,900
100,000
7,000
16,000
194,100
Source: 2010 Coachella Valley Water Management Plan Update, Table 4-4.
SWP contractors make annual requests to DWR for water allocations and DWR makes an initial
SWP Table A allocation for planning purposes, typically in the last month before the next water
delivery year. Throughout the year, as additional information regarding water availability
becomes available to DWR, its allocation/delivery estimates are updated. Table 17, Department
of Water Resources State Water Project Table A Water Allocations, outlines the historic reliability
of SWP deliveries, including their initial and final allocations.
78 Travertine Specific Plan Project WSA/WSV
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Table 17
Department of Water Resources State Water Project Table A Water Allocations
Year
Initial Allocation
Final Allocation
1988
100%
100%
1989
100%
100%
1990
100%
100%
1991
85%
30%
1992
20%
45%
1993
10%
100%
1994
50%
50%
1995
40%
100%
1996
40%
100%
1997
70%
100%
1998
40%
100%
1999
55%
100%
2000
50%
90%
2001
40%
39%
2002
20%
70%
2003
20%
90%
2004
35%
65%
2005
40%
90%
2006
55%
100%
2007
60%
60%
2008
25%
35%
2009
15%
40%
2010
5%
50%
2011
25%
80%
2012
60%
65%
2013
30%
35%
2014
5%
5%
2015
10%
20%
2016
10%
60%
2017
20%
85%
AVERAGE
43%
70%
Source: California Department of Water Resources, State Water Project, Notices to Water
Con tractors.
As noted previously, CVWD and DWA do not directly receive SWP water. CVWD and DWA have
entered into an exchange agreement with MWD that allows MWD to take delivery of CVWD and
DWA SWP Table A water. In exchange, MWD provides an equal amount of Colorado River water
that MWD transports through its Colorado River Aqueduct, which crosses the north end of the
Coachella Valley near the Whitewater River. The delivery agreement allows for advanced delivery
and storage of water, thereby providing better and more efficient water management. Water is
only recharged when MWD aqueduct water is available for exchange. The exchange agreement
79 Travertine Specific Plan Project WSA/WSV
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allows MWD to provide advanced deliveries of up to 800,000 AF and prevents MWD from having a
negative delivery balance. The large storage capacity of the Coachella Valley Groundwater
Basin, and the large volume of water in storage, allow CVWD and DWA to pump from the aquifer
for a number of years without recharging. Large amounts of water can be recharged into the
aquifer when the water is available.
3.8.3 Factors Potentially Impacting State Water Project Delivery Capability
DWR issues the State Water Project Delivery Capability Report (SWPDCR) every two years, with
the adopted 2015 SWPDCR. This report accounts for impacts to water delivery capability
associated with climate change and recent federal litigation (see Appendix B). The 2015 average
long-term reliability of future SWP Table A deliveries through 2035 is projected to be 62 percent.
This allocation percentage is based on computer modeling of the State's watersheds, and past
hydrology adjusted for factors that affect capability. In considering future water supply needs in
the 2010 CVWMP Update, CVWD considered an even lower SWP delivery capability to allow for
the uncertainty of future court decisions, State Water Resources Control Board (SWRCB) actions,
the State and federal Endangered Species Acts (ESAs) and other restrictions, modeling error levee
failure, and relaxation in the Biological Opinions for endangered species as the result of better
science.
There are three significant factors contributing to uncertainty in the delivery capability of SWP
water: 1) possible effect from climate change and sea level rise; 2) the vulnerability of the
Sacramento Delta levees to failure, and 3) greater operation restrictions imposed by the United
States Forest Service and National Marine Fishery Service in response to decreasing populations
of endangered fish species.
CVWD considers purchases of additional Table A Amounts from SWP contractors as they become
available.
3.8.4 Surface Water
Surface water supplies come from several local rivers and streams including the Whitewater
River, Snow Creek, Falls Creek, and Chino Creek, as well as a number of smaller creeks and washes
that discharge into the Coachella Valley. In 1999, surface water supplied approximately three
percent of the total water supply to the western Coachella Valley to meet municipal demand,
and virtually none to the eastern Coachella Valley. Because the surface water supply is directly
affected by variations in annual precipitation, the annual supply is highly variable. Since 1936,
the estimated historical surface water supply has ranged from approximately 1,400 to 9,000 AFY,
averaging about 5,800 AFY.
The majority of local surface water is derived from runoff from the San Bernardino and San
Jacinto Mountains, with lesser amounts from the Santa Rosa Mountains. This runoff either
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percolates in the streambeds, or is captured in mountain -front debris basins, where it recharges
the groundwater basin. According to the estimates developed for the 2010 CVWMP Update,
since 1993, an average of approximately 60,000 AFY of surface water recharged the Whitewater
River Subbasin.
3.8.5 Recycled Water
Wastewater that is highly treated and disinfected can be reused for landscape irrigation, and
other purposes. Recycled wastewater has historically been used for irrigation of golf courses and
municipal landscaping in the Coachella Valley since the early 1960s. In addition, fish farm effluent is
available in localized areas of the eastern Coachella Valley and a portion is being recycled for
reuse. Although recycled water is not planned for use in the Project vicinity, the Project will utilize
recycled water if it becomes available in the future.
3.8.6 Desalinated Drain Water
The 2010 CVWMP Update identifies desalinated agricultural drain water as a future additional
local water supply available for use in the Whitewater River Subbasin. CVWD plans to use treated
agricultural drainage water for irrigation purposes. It is planned that agricultural drain water will
be desalinated to a quality equivalent to that of canal water for irrigation use. The amount of
drain water that would be treated and recycled in the future depends on supply availability of
drain flow, the amount of additional water supplies needed, and the cost of treatment and brine
disposal. According to the 2010 CVWMP Update the amount of water recovered through drain
water desalination could range from 55,000 to 85,000 AFY by 2045.
Treated drain water could be delivered to the canal water distribution system and used as a non -
potable supply for agricultural, golf course and landscape irrigation, and potentially for potable
water supply. Since the desalinated drain water is local water, it would be available for use
throughout CVWD's service area.
A brackish groundwater treatment pilot study and feasibility study was completed in 2008 and
recommended a combined source water strategy involving wells and direct connection to the
open drain outfalls. Such a combined approach will provide additional flexibility and reliability to
this new water supply. This study concluded that agricultural drainage water can effectively be
treated for reuse as non -potable water and potentially as new potable water.
3.8.7 Permanent Water Purchases
In order to assist with long-term supply needs, CVWD purchases Table A amounts (allotments)
from SWP contractors, as they have become available and meet CVWD's needs. Additional
purchases from the SWP and from others with water rights, mainly in the Central Valley of
California, will be evaluated as they become available to determine whether they meet CVWD's
needs. If they do, CVWD may purchase additional SWP water rights.
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3.8.8 Summary of Primary and Additional Water Sources
Table 18, Existing CVWD Water Sources and Supply Table A Amounts, Water Rights and Water
Service Contracts, shows CVWD's existing water supply entitlements, rights and service contracts.
3.9 Analysis of Water Supply and Demand
The analysis of water supply and demand for full build -out of the Travertine Specific Plan Project
(Project) WSA/WSV is based on the 2015 UWMP and the 2010 CVWMP Update. The 2015 UWMP
was prepared in accordance with the Urban Water Management Planning Act as most recently
amended by SBx7-7, which required a Statewide 20 percent reduction in per capita water use by
the year 2020. The purpose of the 2015 UWMP is to document CVWD's projected water demands
and its plans for delivering water supplies to CVWD's service area through 2035. The adopted
2015 UWMP revises and extends CVWD urban water demands to 2040.
Table 18 Existing CVWD Water Sources and Supply Table A Amounts,
Water Rights and Water Service Contracts
Supply
Source, Conveyance
Method, Agreement
Existing
Supplies
AFY
Entitlement
Right
Contract
Other
Ever
Utilized?
Groundwater
Whitewater River
Subbasin
Unspecified'
X
Yes
Colorado River
Water
Coachella Canal 2003
QSA
459,0002
X
Yes
SWP Water3
SWP Contracts and
MWD Exchange
Agreement
138,3504
X5
X
Yes
Recycled Water6
CVWD
8,749
X
Yes
Source: CVWD 2015 UWMP
Notes:
1. CVWD shares a common groundwater source that has not been adjudicated.
2. As quantified in the Quantification Settlement Agreement.
3. 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.
4. Includes Original SWP Table A Amount, Tulare Agreement and MWD Agreement.
5. Annual Allocation of SWP Table A Amount Water Supply.
6. Total projected recycled water (2015), derived from Table 6-7, Current and Projected Recycled Water Direct Beneficial Uses
Within Service Area (DWR Table 6-4 R), from the CVWD 2015 UWMP.
In accordance with SBx7-7, CVWD's 2015 UWMP sets interim and final urban water use targets
for complying with California's 2020 conservation program based on DWRs defined Target
Method No. 1, which provides for an agency goal of 80 percent of baseline demands. The 2015
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UWMP relies on and summarizes the water supplies and water supply program details in the
2010 CVWMP Update.
The 2010 CVWMP Update is a 35 -year plan to reliably meet current and future water demands
in a cost effective and sustainable manner. The Planning Areas for the 2010 CVWMP Update is
the Whitewater River Subbasin including Salton City in Imperial County and areas north of the
Banning Fault that are within the service areas in Indio and Coachella. The 2010 CVWMP Update
evaluates all of the water demand and supplies in the Planning Areas through 2045, for all water
users including urban, agricultural and golf, and provides a preferred alternative water supply
plan for meeting demands. The 2010 CVWMP Update evaluates long-term risks to water supplies
such as reduced SWP capability and reduced SWP supplies, and provides contingencies for
addressing these risks. The elements of the preferred alternative are imported water supplies,
recharge, source substitution and conservation. The preferred alternative identifies projects and
programs that implement these plan elements.
The 2010 CVWMP Update relies on the Riverside County Population Projections 2006 (RCP -06).
The 2014 CVWMP Status Report updated the population projections based on the Riverside
County Populations Projections 2010 which are lower. The updated projections are relied on in
the 2015 UWMP.
In 2005, Riverside County was experiencing rapid growth. Recognizing the need for more
accurate growth forecasts, the Riverside County Center for Demographic Research (RCCDR) was
established under the joint efforts of the County of Riverside, the Western Riverside Council of
Governments, the Coachella Valley Association of Governments, and the University of California
Riverside for the development of demographic data and related support products to serve all of
Riverside County. The RCCDR was tasked with developing the RCP -2006 growth forecast to
provide agencies with a consistent and standard set of population, housing, and employment
forecasts. Southern California Association of Governments adopted the RCP -06 for use in their
regional growth forecasts.
Although the growth forecast indicated significant future growth for the Coachella Valley, these
forecasts were based on potential development that had not yet been approved by the County
or by cities within the Coachella Valley. Prior to 2008, there was substantial development
pressure to transition from agricultural to urban land uses. As agricultural land converts to urban
uses, the characteristic of its water demands and infrastructure will change. The 2010 CVWMP
Update reflects these changes in its water demand projections and the ways that water is used
in this area. As urban development occurs, land that currently is irrigated with untreated
Coachella Canal water could begin utilizing groundwater replenished with canal water, or use
treated canal water for indoor use and untreated canal water for outdoor use.
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Tribal land in the Coachella Valley makes up over 49,000 acres. While much tribal land in the
western Coachella Valley has been developed to varying degrees, a substantial amount of tribal
land in the eastern Coachella Valley is undeveloped. An understanding of the timing and degree
of development on tribal lands is important. All of the Coachella Valley tribes have developed
one or more casinos, which have provided tribes with important economic opportunities. As
development continues in the Coachella Valley, it is expected that additional growth will occur
on the remaining tribal lands.
In other portions of the Coachella Valley, development of tribal land is closely coordinated with
the Coachella Valley cities where they are located. RCP -2006 and RCP -2010 growth forecasts are
assumed to include development of these lands.
As shown in Table 19, Projected Average Urban Water Supply (AFY), the 2015 UWMP projects
that the percentage of water from each of the current water supply sources will change
significantly by 2040, relative to 2015 conditions.
3.9.1 Effects of the 2008-2011 Recession
Riverside County was hit particularly hard by the economic downturn that started in 2008. The
recession resulted in a lower than projected growth rate for the Coachella Valley and because
the planning period for the 2010 CVWMP Update is through 2045, the effects of the recession on
growth in the Coachella Valley have begun, and will continue, to attenuate over the long-term.
The 2010 CVWMP Update incorporates these factors as it is assumed that development within
the Coachella Valley will continue and that the Riverside County Planning growth forecast is
applicable in the long-term.
In CVWD's 2014 CVWMP Status Report, the RCP 2010 population projections were considered
and future water demands were re-evaluated. Using RCP 2010 results in an estimated 22 percent
lower urban water demand in 2035 and a 13 percent higher agricultural water demand. Overall
demand would be about 14 percent lower in 2045. It is important to note that this is not an
elimination of demand but a deferral of demand to later years. Growth will continue but at a
slightly slower rate.
Water conservation is a major component of future water management. CVWD is committed to
reducing its urban water use by 20 percent by 2020. Therefore, CVWD has been conservative in
the calculation of 2015 and 2020 urban conservation targets. 2010 U.S. Census Data was not
available to be used in the preparation of the 2015 UWMP. CVWD used 2000 census data. Water
Code Section 10608.2 allowed urban water suppliers to update 2020 urban targets in the 2015
UWMP based on the availability of 2010 Census Data. Because CVWD's recalculated urban
conservation targets were higher than those committed to in the 2010 UWMP, CVWD retained
its 2010 targets of 540 gpcd by 2015 and 473 gpcd by 2020 which will result in greater water
84 Travertine Specific Plan Project WSA/WSV
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savings. CVWD's actual 2015 water use was 383 gpcd. Drought restrictions played a significant
role in achieving this reduction.
Table 19 Projected Average Urban Water Supply (AFY)
Water Supply
Additional
Detail on Water
Supply
Projected Water Supply
2020
2025
2030
2035
2040 (opt)
Groundwater
Potable Urban Use
113,400
102,100
112,700
106,600
101,000
Purchased or
Imported Water
Treated Canal
Water for potable
urban use in East
Valley'
0
18,000
18,000
31,000
40,000
Urban Potable Subtotal
113,400
120,100
130,700
137,600
141,000
Purchased or
Imported Water
Untreated Canal
water for non -
potable urban use
in East Valley'
1,200
11,200
17,000
26,300
33,300
Desalinated
Water
Desalinated drain
water for non -
potable urban use
0
5,000
10,000
15,000
20,000
Urban Non -potable Subtotal
1,200
16,000
27,000
41,300
53,300
Recycled Water
WRP-72
3,400
3,700
4,000
4,300
,600
Recycled Water
WRP-102
10,900
11,300
1,700
12,100
12,500
Recycled Water
WRP-42-3
0
17,700
15,100
17,500
19,200
Recycled Water Subtotal
14,300
27,700
30,800
33,900
36,300
Total Retail Supply
128,900
163,800
188,500
212,800
230,600
Purchased or
Imported Water
Sale of Canal
water to IWA for
potable use
5,000
10,000
20,000
20,000
20,000
Total Wholesale Supply
5,000
10,000
20,000
20,000
20,000
Source: CVWD, 2015 Urban Water Management Plan, Table 6-12.
Notes:
1.
Total Colorado River allotment will increase from 397,000 AF in 2016 to 459,000 AF in 2026. Colorado River
water supply does not sum to total right because of nonurban supply not shown on this table and projected
wholesale to other agencies.
2. Recycled water safe yield is based on total projected flows at each WRP; surface discharge and percolated
wastewater effluent is not included in the reasonably available supply estimates.
3. Assumes tertiary treatment is not available until after 2020 at WRP-4.
The golf industry represents a significant water demand sector in the Coachella Valley and is
expected to remain so in the future. CVWD, working in cooperation with the Southern California
Golf Association and the local golf community, has established a Golf and Water Task force to
reduce overall golf course water use by ten percent.
The 2010 CVWMP Update assumes that the fish farm and duck club growth will be much lower
than projected in the 2002 CVWMP. Some of the large fish farms have moved from the traditional
fish farming business. The replacement use at these farms is suspected to significantly reduce
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the water demand. Based on the available information at this time, further fish farm demand of
8,500 AFY and duck club demand of 2,000 AFY was assumed.
It was also assumed that the growth occurring on tribal land will be similar to other areas in the
Coachella Valley, and land uses will be proportional to the growth that occurs on non -tribal land
in the eastern Coachella Valley. Corresponding water demands are calculated based on this
growth assumption.
The 2010 CVWMP Update increases the water conservation requirement during the next 35
years. A 14 percent reduction in agricultural water use is targeted by 2020. CVWD's Landscape
Ordinance 1302.3, updated in 2017, will govern the irrigation demands of new golf courses as
well as reduce the demands of existing golf courses by 10 percent.
The 2010 CVWMP Update water demand projections for the Whitewater River Subbasin for the
period 2010 to 2030 in five-year intervals increases from 678,000 AFY in 2010 to 783,300 AFY in
2030, or 15 percent. During this same period, using RCP 2006, the population in the Coachella
Valley is estimated to increase by over 100 percent, or about four percent per year. In the 2014
CVWMP Status Report, RCP 2010 projections were used and the Whitewater River Subbasin
water demand was revised to 691,500 in 2030, a 12 percent reduction.
3.9.2 Groundwater and Groundwater Storage
As supply and demand change, the amount of groundwater in storage changes to make up the
difference between the demand and the supply. Other than canal water, recycled wastewater
and desalinated agricultural drain water, all water delivered to the urban water users is obtained
from the groundwater basin. The groundwater basin has the capacity of approximately 28.8
million AF. It currently contains about 25 million AF and acts as a very large reservoir. It is capable
of meeting the water demands of the Coachella Valley for extended periods.
As discussed in the 2010 CVWMP Update, CVWD has many programs to maximize the water
resources available to it including groundwater recharge with its Colorado River and SWP
supplies, recycled wastewater, desalinated agricultural drain water, substitution of groundwater
uses with canal water, and conservation including tiered water rates, a landscaping ordinance,
and outreach and education. The 2010 CVWMP Update and CVWD replenishment assessment
programs establish a comprehensive and managed effort to eliminate the overdraft.
Exhibit 8, in Section 1.5, illustrates the long-term progression and methods towards eliminating
overdraft with successful implementation of the 2010 CVWMP Update and 2015 UWMP
programs as previously discussed. These programs allow CVWD to maintain the groundwater
basin as its primary water supply and to recharge the groundwater basin as its other supplies are
available.
86 Travertine Specific Plan Project WSA/WSV
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The 2014 CVWMP Status Report evaluated progress to date on eliminating overdraft. The report
illustrates the effectiveness of the CVWMP programs and shows that overdraft did not occur in
the ten years from 2003 and 2013. The report also shows that with continued implementation of
CVWMP programs, overdraft will be eliminated in 2021. The effectiveness of the CVWD's
programs is clear and shows that there will be a steady increase in water in storage with limited
disruption to this pattern through 2045.
3.9.3 Coachella Canal Water
Colorado River supplies available to CVWD under the 1931 Seven Party Water Priority 43
Agreement and QSA agreement are considered in the 2015 UWMP and 2010 CVWMP Update.
CVWD has maximized delivery of these supplies by participating in canal lining projects. In 2008,
the canal was fully lined. The annual reporting of CVWD Colorado Diversions at Imperial Dam for
the period of 1964 to 2008 was prepared as required by the U.S. Supreme Court decree. CVWD
average annual diversion for this 45 -year period was 402,702 AFY. CVWD's average annual
diversion for the period 1983 to 2008 (26 years of decree records) was 328,698 AFY. The
difference of 74,004 AFY is the result of the water conserved by the lining of the first 49 miles of
the Coachella Branch of the American Canal by the U.S. Bureau of Reclamation (USBR) under
repayment contract with CVWD. The QSA assures that CVWD receives a quantified allotment of
Colorado River supplies. The QSA has been unsuccessfully challenged in State and federal courts
and remains in effect. In the most recent 6 -year period (2008 to 2013), the annual average
diversion was 313,971 AFY.
3.9.4 Additional Table A Amounts
DWA and CVWD have increased their SWP supplies from a total of 61,200 AFY in 2002 to a current
total of 194,100 AFY in 2014.
3,9.5 State Water Project Capability Report
The 2015 State Water Project Delivery Capability Report (SWPDCR) projections are the result of
computer modeling by DWR that reflect the results of adjusting 82 years of hydrology to
incorporate the results of climate change models. The 2015 SWPDCR projections also take into
consideration the existing physical facilities and the regulatory restrictions, which include the
restriction on the SWP and Central Valley Project (CVP) operations in accordance with the
Biological Opinions of the US Fish and Wildlife Service (USFWS) and National Marine Fisheries
Service (NMFS) as issued on December 15, 2008 and June 4, 2009, respectively.
The 2015 SWPDCR has also been adjusted to allow for the uncertainty of future court decisions,
SWRCB actions, State and federal ESAs and other restrictions, modeling error, levee failure and
relaxation of biological opinions as the result of improved scientific research.
Although in recent years uncertainty has resulted in reduced capability, SWP capability has been
100 percent as recently as 2006 and dropped to 5 percent in 2014 with the onset of the California
87 Travertine Specific Plan Project WSA/WSV
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Drought. SWP capability increased to 20 percent in 2015, and was at 60 percent as of April 21'
2016. CVWD plans for a long-term average capability of 50 percent in the 2010 CVWMP Update
and 2015 UWMP.
3.9.6 Metropolitan Water District of Southern California (MWD) Callback
In 1984 MWD, DWA, and CVWD entered into an advanced delivery agreement, which allowed
MWD to store water from its Colorado River Aqueduct in the Coachella Valley. Prior to this
agreement, DWA and CVWD were exchanging their annual SWP Table A amount with MWD for
the same amount of water from MWD's Colorado River Aqueduct. This exchange is necessary
because the SWP conveyance system does not extend into the Coachella Valley. The 1984
agreement allows MWD to deliver more water into the Coachella Valley during wet periods, or
periods when it has excess water, and to build a credit that it can use to provide the water in
exchange for DWA's and CVWD's SWP Table A amounts during dry periods. This ability for
advanced delivery and exchange creates a conjunctive use program among the three agencies.
In 2003, MWD, DWA, and CVWD entered into an exchange agreement whereby MWD transferred
title to 100,000 AF of its SWP Maximum Table A amount to DWA and CVWD. Under the
agreement, MWD obtained the right to callback the SWP water for its use for a maximum number
of times in a given period of years. The 100,000 AF was divided into two 50,000 AF blocks. The 2015
UWMP assumes that MWD will periodically exercise its option to callback the 100,000
AFY. This is also in accordance with the 2010 CVWMP Update. The actual callback would depend
on availability of MWD's supplies to meet their demands. Since 2003, MWD exercised its callback
option one time, in 2005.
3,9.7 Long -Term Average State Water Project Deliveries
The amount of SWP supply that is available to CVWD for its own use was considered as the long-
term average SWP supply. The published capability of the SWP water has decreased over time.
The factors that could affect the SWP capability considered in the 2015 UWMP and the 2010
CVWMP update are:
• Uncertainty in modeling restrictions associated with Biological Opinions;
• Risk of levee failure in the Sacramento Delta;
• Additional pumping restrictions resulting from biological opinions on new species of
revisions to existing biological opinions;
• Impacts associated with litigations such as State and federal ESA lawsuits;
• Climate change impacts.
Due to these factors and the need to plan for higher contingency, the planning assumption in the
2010 CVWMP Update and the 2015 UWMP is that the long-term future average SWP capability
88 Travertine Specific Plan Project WSA/WSV
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will be at 50 percent until successful completion of the Bay -Delta Conservation Plan and Delta
conveyance facilities.
Groundwater basin recharge through direct and in -lieu (indirect) recharge is a major element of
CVWD's water management activities. CVWD has spent over $43.5 million on the construction of
the TEL GRF in the eastern Coachella Valley, and over $42 million on the construction of the Mid -
Valley Pipeline, to move canal water into the northern Coachella Valley for source substitution of
groundwater. The protection of the aquifer storage will be addressed through additional water
supply purchases, water conservation, and source substitution similar to the ones described in
the 2010 CVWMP Update.
The available supplies and water demands for CVWD's service area were analyzed in the water
supply conditions of the 2015 UWMP to assess the region's ability to satisfy current and future
urban water demands, including those of the proposed Project, under three scenarios: a normal
water year, a single dry year, and multiple dry years. According to the 2015 UWMP, the urban
water demands in the CVWD service area (retail supply totals) are estimated to grow from
114,600 AFY in 2020 to 194,300 AFY in 2040.
Therefore, the estimated water demand under the Plan A Option (1,255.13AFY, or 1.43 AF/acre)
and the Plan B Option (639.46 AFY, or 0.72 AF/acre) represent approximately 1.09 percent (Plan
A) and 0.55 percent (Plan B) of the total water supply number (114,600 AFY) for 2020, and would
represent 0.64 percent (Plan A) and 0.32 percent (Plan B) of the total water supply number
(194,300 AFY) for 2035.
The following tables provide CVWD's projected water supplies and demands in a normal year,
single dry year, and multiple dry years. These tables combine retail and wholesale numbers to
simplify the presentation. It should be noted that the retail supplies and demands presented in
the tables below include recycled water delivered to CVWD's non -urban customers based on
DWR's standardized tables and the 2015 UWMP Guidebook. However, as discussed in Sections 4
and 6 of the 2015 CVWD UWMP, recycled water is not considered an urban water supply and is
not delivered to CVWD's urban water customers. Instead, recycled water is used to offset the
groundwater pumping of private well owners (mainly golf courses) to eliminate overdraft. The
wholesale demand and supply listed is the anticipated sale of raw Colorado River water to the
Indio Water Authority. These tables indicate that CVWD will be able to meet current and future
urban water demand needs through groundwater pumping, recharge with Colorado River water,
and distribution of treated Colorado River water during normal, single dry, and multiple dry years.
DWR requires the supply reliability tables to include both potable and recycled water; this is
summarized below in Table 20, Normal Year Supply and Demand Comparison (adapted from DWR
Table 7-2 R and DWR Table 7-2 W), for the average year.
89 Travertine Specific Plan Project WSA/WSV
as
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Table 20 Normal Year Supply and Demand Comparison adapted
from DWR Table 7-2 R and DWR Table 7-2 W)
Source: CVWD 2015 UWMP, Table 7-3.
CVWD does not use recycled water in its urban water supply, therefore a version of this table
without recycled water is presented in Table 21, Normal Year Supply and Demand Comparison -
Urban Supply Only, which more accurately represents CVWD's urban water supply reliability.
Table 21 Normal Year Supply and Demand Comparison - Urban Supply Only
2020
2025
2030
2035
2040(Opt)
Retail
Supply totals (AF)
128,900
163,800
188,500
212,800
230,600
Demand totals (AF)
128,900
163,800
188,500
212,800
230,600
Difference (AF)
0
0
0
0
0
Wholesale
Supply totals (AF)
5,000
10,000
20,000
20,000
20,000
Demand totals (AF)
5,000
10,000
20,000
20,000
20,000
Difference (AF)
0
0
0
0
0
Source: CVWD 2015 UWMP, Table 7-3.
CVWD does not use recycled water in its urban water supply, therefore a version of this table
without recycled water is presented in Table 21, Normal Year Supply and Demand Comparison -
Urban Supply Only, which more accurately represents CVWD's urban water supply reliability.
Table 21 Normal Year Supply and Demand Comparison - Urban Supply Only
Source: CVWD 2015 UWMP, Table 7-4.
Urban water supplies during a single dry year is fully 100 percent reliable. Thus, the supply and
demand comparison for the single dry year, shown in Table 22, Single Dry Year Supply and
Demand Comparison (adapted from DWR Table 7-3 R and DWR Table 7-3 W) is the same as the
average year.
Table 22 Single Dry Year Supply and Demand Comparison
(adapted from DWR Table 7-3 R and DWR Table 7-3 W)
2020
2025
2030
2035
2040(Opt)
Retail
Supply totals (AF)
114,600
136,100
157,700
178,900
194,300
Demand totals (AF)
114,600
136,100
157,700
178,900
194,300
Difference (AF)
0
0
0
0
0
Wholesale
Supplytotals (AF)
5,000
10,000
20,000
20,000
20,000
Demand totals (AF)
5,000
10,000
20,000
20,000
20,000
Difference (AF)
0
0
0
0
0
Source: CVWD 2015 UWMP, Table 7-4.
Urban water supplies during a single dry year is fully 100 percent reliable. Thus, the supply and
demand comparison for the single dry year, shown in Table 22, Single Dry Year Supply and
Demand Comparison (adapted from DWR Table 7-3 R and DWR Table 7-3 W) is the same as the
average year.
Table 22 Single Dry Year Supply and Demand Comparison
(adapted from DWR Table 7-3 R and DWR Table 7-3 W)
Source: CVWD 2015 UWMP, Table 7-5.
90 Travertine Specific Plan Project WSA/WSV
2020
2025
2030
2035
2040(Opt)
Retail
Supply totals (AF)
128,900
163,800
188,500
212,800
230,600
Demandtotals(AF)
128,900
163,800
188,500
212,800
230,600
Difference (AF)
0
0
0
0
0
Wholesale
Supply totals (AF)
5,000
10,000
20,000
20,000
20,000
Demand totals (AF)
5,000
10,000
20,000
20,000
20,000
Difference (AF)
0
0
0
0
0
Source: CVWD 2015 UWMP, Table 7-5.
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Table 23, Single Dry Year Supply and Demand Comparison - Urban Only, presents the urban
supply and demand comparison without recycled water.
Table 23 Single Dry Year Supply and Demand Comparison - Urban Only
Source: CVWD 2015 UWMP, Table 7-6
Similar to the single dry year, the multiple dry year urban water supply reliability is 100 percent.
Table 24, Multiple Dry Years Supply and Demand Comparison (adapted from DWR Table 7-4 R and
DWR Table 7-4 W), summarizes the multiple dry year supply and demand comparison.
Table 24 Multiple Dry Years Supply and Demand Comparison (adapted from DWR Table
7-4 R and DWR Table 7-4 W)
1
ii
2020
2025
2030
2035
2040(Opt)
Retail
Supply totals (AF)
114,600
136,100
157,700
178,900
194,300
Demand totals (AF)
114,600
136,100
157,700
178,900
194,300
Difference (AF)
0
0
0
0
0
Wholesale
Supply totals (AF)
5,000
10,000
20,000
20,000
20,000
Demand totals (AF)
5,000
10,000
20,000
20,000
20,000
Difference (AF)
0
0
0
0
0
Source: CVWD 2015 UWMP, Table 7-6
Similar to the single dry year, the multiple dry year urban water supply reliability is 100 percent.
Table 24, Multiple Dry Years Supply and Demand Comparison (adapted from DWR Table 7-4 R and
DWR Table 7-4 W), summarizes the multiple dry year supply and demand comparison.
Table 24 Multiple Dry Years Supply and Demand Comparison (adapted from DWR Table
7-4 R and DWR Table 7-4 W)
1
2020
2025
2030
2035
2040 (Opt)
Retail
First year
Supply totals (AF)
128,900
163,800
188,500
212,800
230,600
Demand totals (AF)
128,900
163,800
188,500
212,800
230,600
Difference (AF)
0
0
0
0
0
Second year
Supply totals (AF)
128,900
163,800
188,500
212,800
230,600
Demand totals (AF)
128,900
163,800
188,500
212,800
230,600
Difference (AF)
0
0
0
0
0
Third year
Supply totals (AF
128,900
163,800
188,500
212,800
230,600
Demand totals (AF)
128,900
163,800
188,500
212,800
230,600
Difference (AF)
0
0
0
0
0
Wholesale
First year
Supply totals (AF)
5,000
10,000
20,000
20,000
20,000
Demand totals (AF)
5,000
10,000
20,000
20,000
20,000
Difference (AF)
0
0
0
0
0
Second year
Supply totals (AF)
5,000
10,000
20,000
20,000
20,000
Demand totals (AF)
5,000
10,000
20,000
20,000
20,000
Difference (AF)
0
0
0
0
0
Third year
Supply totals (AF)
5,000
10,000
20,000
20,000
20,000
Demand totals (AF)
5,000
10,000
20,000
20,000
20,000
Difference (AF)
0
0
0
0
0
Source: CVWD 2015 UWMP, Table 7-7.
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Table 25, Multiple Dry Years Supply and Demand Comparison - Urban Only, presents the urban
supply and demand comparison without recycled water.
Table 25 Multiple Dry Years Supply and Demand Comparison - Urban Only
Source: CVWD 2015 UWMP, Table 7-8.
3.10 Summary
As summarized below in Table 26, Impact of Project Demand on Groundwater Supply, projected
water demand associated with the proposed Project under the Plan A and Plan B Options would
represent 0.64 percent and 0.55 percent of CVWD's total projected Urban Water demand in
2040.
Per the 2015 UWMP and the 2010 CVWMP Update, CVWD included water for new development
that it assumed would occur within its service area. The projected demand for the Project will
therefore account for only a small fraction of the projected demands.
92 Travertine Specific Plan Project WSA/WSV
2020
2025
2030
2035
2040
Retail
First year
Supply totals (AF)
114,600
136,100
157,700
178,900
194,300
Demand totals (AF)
114,600
136,100
157,700
178,900
194,300
Difference (AF)
0
0
0
0
0
Second year
Supply totals (AF)
114,600
136,100
157,700
178,900
194,300
Demand totals (AF)
114,600
136,100
157,700
178,900
194,300
Difference (AF)
0
0
0
0
0
Third year
Supply totals (AF)
114,600
136,100
157,700
178,900
194,300
Demand totals (AF)
114,600
136,100
157,700
178,900
194,300
Difference (AF)
0
0
0
0
0
Wholesale
First year
Supply totals (AF)
5,000
10,000
20,000
20,000
20,000
Demand totals (AF)
5,000
10,000
20,000
20,000
20,000
Difference (AF)
0
0
0
0
0
Second year
Supply totals (AF)
5,000
10,000
20,000
20,000
20,000
Demand totals (AF)
5,000
10,000
20,000
20,000
20,000
Difference (AF)
0
0
0
0
0
Third year
Supply totals (AF)
5,000
10,000
20,000
20,000
20,000
Demand totals (AF)
5,000
10,000
20,000
20,000
20,000
Difference (AF)
0
0
0
0
0
Source: CVWD 2015 UWMP, Table 7-8.
3.10 Summary
As summarized below in Table 26, Impact of Project Demand on Groundwater Supply, projected
water demand associated with the proposed Project under the Plan A and Plan B Options would
represent 0.64 percent and 0.55 percent of CVWD's total projected Urban Water demand in
2040.
Per the 2015 UWMP and the 2010 CVWMP Update, CVWD included water for new development
that it assumed would occur within its service area. The projected demand for the Project will
therefore account for only a small fraction of the projected demands.
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Table 26 Impact of Project Demand on Groundwater Supp y
Travertine Specific Plan Build -Out
20401
Total Supply
194,300 AFY
Project Demand — Plan A Option
1,255.13 AFY
1.43 AF/Acre
Percent of Supply— Plan A Option
0.64
Project Demand — Plan B Option
639.46 AFY
0.72 AF/Acre
Percent of Supply— Plan B Option
0.55
Source: Total supply extrapolated from the adopted 2015 UWMP, Table
7-4. Project demand extrapolated from Section 2.6, Tables 10 and
11 of this WSA/WSV, based on a 10 -year build -out.
Notes:
1. 2030 is the final buildout year for the Travertine Specific Plan Project.
3.11 Conclusions
3.11.1 Coachella Valley Water District Service Area
Based on the information, analysis, and findings documented in this WSA/WSV, there is
substantial evidence to support a determination that there will be sufficient water supplies to
meet the demands of the proposed Project, and future demands of the Project, plus all forecasted
demands in the next 20 years. This is based on the volume of water available in the aquifer,
CVWD's Colorado River contract supply, SWP Table A amounts, water rights and water supply
contracts, and CVWD's commitment to eliminate overdraft and reduce per capita water use in
CVWD's service area. CVWD has committed sufficient resources to further implement the primary
elements of the 2010 CVWMP Update and 2015 UWMP, which includes the full utilization of
imported water supplies, purchase of additional water supplies, water conservation, and source
substitution.
The domestic water supply (potable) for the Project will be from the Whitewater River Subbasin
in the Coachella Valley. Groundwater storage will be used in dry years to make up the difference
between the demand and the supply. The groundwater basin has a storage capacity of
approximately 28.8 million AF, simulating the benefit of a very large reservoir and is capable of
meeting the water demands of the Coachella Valley for extended normal and drought periods.
As discussed in the 2010 CVWMP Update, the 2015 UWMP and this WSA/WSV, CVWD has many
programs to maximize the water resources available to the CVWD including recharge of the basin
using its Colorado River and SWP water supplies, recycled wastewater, desalinated agricultural
drain water, conversion of groundwater uses to canal water and water conservation including
tiered water rates, the landscaping ordinance, outreach and education.
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CVWD's groundwater replenishment programs establish a comprehensive and managed effort to
eliminate the overdraft. These programs allow CVWD to maintain the groundwater basin as its
primary water supply and to recharge the groundwater basin as its other supplies are available.
CVWD has purchased 115,250 AF of additional SWP Table A amount since 2002.
3.11.2 Project Water Requirements
The Project under the Plan A Option would use approximately 1,255.13 acre-feet per year (AFY)
or, 1.43 acre-feet (AF) per acre. Plan A water demand represents approximately 1.09 percent of
the total water supply number (114,600 AFY) for 2020, and approximately 0.64 percent of the
total water supply number (194,300 AFY) for 2035.
The Project under the Plan B Option would use approximately 639.46 acre-feet per year (AFY) or,
0.72 AF per acre. Plan B water demand represents approximately 0.55 percent of the total water
supply number (114,600 AFY) for 2020, and approximately 0.32 percent of the total water supply
number (194,300 AFY) for 2035.
It is anticipated that the Project will incorporate elements of CVWD's water conservation plan as
required by SBx7-7. These include conservation elements for indoor and outdoor use for single-
family residential, mixed-use composed of commercial with residential land uses, and community
and neighborhood park uses. This may further reduce the ultimate Project demands.
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4 Water Supply Verification (WSV)
4.1 General
As discussed in Section 1.4.2, the proposed Travertine Specific Plan (Project) will be subject to
the requirements of Senate Bill 221 pursuant to the Subdivision Map Act since more than 500
residential dwelling units are proposed for the project (1,501).
4.2 Water Source
Project domestic water supplies and associated landscape irrigation supplies will be provided
from groundwater. The Water Supply Verification (WSV) addresses:
1. Information included in Coachella Valley Water District's (CVWD's) 2010 Coachella
Valley Water Management Plan (CVWMP) Update and the 2015 Urban Water
Management Plan (UWMP);
2. Issues related to groundwater recharge of non -groundwater sources, namely
Colorado River water and State Water Project (SWP) water; and
3. Consideration of historical litigation regarding the Quantification Settlement
Agreement (OSA).
4.3 Supporting Documentation
This WSV relies on CVWD's 2010 CVWMP Update. Supporting information is also used from the
CVWD 2015 UWMP, as permitted by Government Code Section 66473.7.
4.4 Factors of Capability
4.4.1 General
Government Code Section 66473.7(a) requires that all of the following factors be considered:
1. The availability of the supply over 20 years;
2. The applicability of CVWD's Water Shortage Contingency Analysis;
3. The reduction of water supply to a specific user by ordinance or resolution; and
4. The reasonable amount of groundwater supply that can be relied upon, considering its
natural sources as well as the supporting recharge sources within agreements for
Colorado River water and SWP water.
4.4.2 Historical Availability of Water Supply
The Coachella Valley has been primarily dependent on groundwater as a source of domestic
water for several decades. The 2010 CVWMP Update and the 2015 UWMP both reviewed the
historical use of water in the Coachella Valley. In 1936, groundwater use was 92,400 AFY. Current
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use is at approximately 317,247 AFY annually (2012). Deliveries of Colorado River water and
Metropolitan Water District of Southern California (MWD) SWP transfer water assist in offsetting
the groundwater use. The Colorado River water deliveries have averaged approximately 332,301
AFY over the past five years, with MWD deliveries to the Coachella Valley expected to average
over 60,000 AFY.
4.4.3 Water Shortage Contingency
Following the governor's drought emergency declaration, CVWD implemented its water shortage
contingency plan through a series of ordinances with phased water use restrictions and a drought
penalty rate structure:
• Ordinance 1414— Stage 2 — 10% Mandatory Reduction;
• Ordinance 1419 — Stage 3 — 36% Mandatory Reduction;
• Ordinance 1422 — Stage 3 — Adopt Additional Watering Restrictions; 36% Mandatory
Reduction;
• Ordinance 1426 — Stage 3 — Replace Previous Ordinances, 32% Mandatory Reduction
After the State Water Resources Control Board's (SWRCB's) adoption of revised regulations in
May 2016, CVWD repealed these ordinances and adopted Ordinance 1422.3 which establishes
Stage 2 restrictions that remain in effect until the SWRCB rescinds its emergency regulations.
Copies of these ordinances are contained in Appendix E of the 2015 UWMP.
Based on the experiences from the current drought, the Domestic Water Shortage Contingency
Plan provides the stages and action levels summarized in Table 27, Stages of Urban Water
Shortage Contingency Plan (DWR Table 8-1 R).
Table 27 Stages of Urban Water Shortage Contingency Plan (DWR Table 8-1 R).
Stage
Percent Supply
Reduction
Water Supply Condition
1
10%
Normal water supplies
2
10%
10% reduction in total groundwater and imported supplies
relative to long-term average conditions
3
25%
25% reduction in total groundwater and imported supplies
relative to long-term average conditions
4
50%
50% reduction in total groundwater and imported supplies
relative to long-term average conditions
Source: 2015 UWMP, Table 8-1.
Notes:
1. Stage 1 is voluntary reduction, stages 2 through 4 are mandatory reductions.
2. The Stage 2 and Stage 3 reduction targets are flexible and may be adjusted by CVWD Board
action based on actual supply conditions.
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4A.4 Reduction of Water Supply
No reduction of water supply is expected to any user due to this Project's use of water resources,
or due to CVWD's ongoing management of water resources and planning for growth within their
service area and throughout the Coachella Valley.
4.4.5 State Water Project and Colorado River Water
CVWD's Colorado River Water rights and SWP Table A allotments will provide supplemental
water for direct use and groundwater recharge to the Coachella Valley. CVWD proposes to
develop direct treatment of Colorado River water for potable uses in the future. The Coachella
Valley Groundwater Basin has the capacity to meet future demands. Based on the information
provided in the 2015 SWPDCR, CVWD's Colorado River water rights, recycled water, desalinated
drain water and CVWD's water conservation program, water supplies will be sufficient to meet
the Project's demands and CVWD's existing and future demands. In the event that additional
conservation and/or limitations are necessary, the Project would adhere to any and all limitations
associated with this potential reduction in supply.
In addition, the U.S. Bureau of Reclamation (USBR) has developed interim surplus and shortage
guidelines for management of the Colorado River water supplies. The USBR preferred alternative
provides flexibility for the potential storage of additional conserved Colorado River or non -
Colorado River water in Lake Mead. The guidelines that were adopted by the USBR have been
updated and extended through 2026. The revised guidelines address the operation of Lake Mead
at relatively full elevations, and determine when "surplus" water supplies would be available to
water users in southern California, including the Coachella Valley. As currently drafted, the
guidelines indicate that water shortages will not negatively impact the Colorado River water
supply for the Coachella Valley. CVWD is part of the California agricultural agencies' Colorado
River entitlement and is protected by over two million AF of Lower Basin Colorado River
entitlements that have a lower priority. The lower priority water would be used to meet
shortages before the agricultural entitlements would begin to be impacted.
4.5 Impacts to Other Projects
As discussed earlier, landscaping for the proposed Project will consist of desert efficient, drought
tolerant trees and shrubs and xeriscape groundcover. Indoor water efficient devices (i.e.,
Watersense° toilets, smart irrigation timers, etc.) will be included in each residential dwelling
unit to attain the goals of the 2010 CVWMP Update by:
• Meeting current and future water demands with a 10 percent supply buffer;
• Contributing to the elimination of long-term groundwater overdraft;
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• Managing and protecting water quality with a project specific Water Quality
Management Plan;
• Complying with State of California (State) and federal laws and regulations;
• Managing future costs; and
• Minimizing adverse environmental impacts.
Therefore, full build -out of the Project would not have a significant impact on agricultural,
potable, or industrial water users. In addition, the proposed Project would not affect the water
supply for future low income housing projects. The Project will comply with CVWD Landscape
Ordinance 1302.3. The Project may be responsible for funding the purchase of additional
imported water supplies to support its projected demands on the Public Water System (PWS).
Based on the findings of the WSV, it is expected that the impacts to the groundwater basin are
fully mitigated.
4.6 Rights to Groundwater
CVWD has the legal authority to manage the groundwater basins within its service area under
the County Water District Law (California Water Code, Division 12). The Coachella Valley
Groundwater Basin is not adjudicated. CVWD has the right to extract the groundwater as needed
to supply this Project. In 2015 CVWD has filed a Notice of Election with California Department of
Water Resources (DWR) to become a Sustainable Groundwater Management Act (SGMA)
Groundwater Sustainability Agency (GSA), and has submitted the 2010 CVWMP Update as the
Alternative Groundwater Sustainability Plan (GSP) for the Whitewater River Subbasin.
4.7 Verification
This document provides verification that adequate water supply for this Project is available, as
required by California Government Code Section 66473.7.
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5 References
California Department of Water Resources, Bay- -Delta Office, Final State Water Project Delivery
Reliability Report 2011, (accessed July, 2015).
California Department of Water Resources, Bay- -Delta Office, Draft State Water Project Delivery
Reliability Report 2013, (Accessed July, 2015).
California Department of Water Resources. 2013. Draft 2013 Delivery Reliability Report,
(accessed September, 2015).
Coachella Valley Water District Landscaping and Irrigation Design Criteria," prepared by CVWD
October 2007.
Coachella Valley Water District Engineer's Report on Water Supply and Replenishment
Assessment, Upper White Water River Subbasin Area of Benefit 2013-2014 (April 2013).
Coachella Valley Water District Engineer's Report on Water Supply and Replenishment
Assessment, Upper White Water River Subbasin Area of Benefit 2013-2014 (April 2013).
Coachella Valley Water District 2015 Urban Water Management Plan,
Coachella Valley Water District Engineer's Report on Water Supply and Replenishment
Assessment, Upper White Water River Subbasin Area of Benefit 2014-2015 (April 2014).
Department of Water Resources, California's Groundwater, Bulletin 118, Coachella Valley
Groundwater Basin, Whitewater Subbasin, (February 27, 2004).
California Department of Water Resources, State Water Project, Notices to Water Contractors.
Website accessed July 2015. http://wwwdwr.water.ca.gov/
Coachella Valley Water District, 2010 CVWMP Update (December 2010).
Malcolm-Pirnie, 2008b. Feasibility Study for Full -Scale Brackish Groundwater Treatment Facility,
prepared for CVWD, October 2008.
State of California Natural Resources Agency Department of Water Resources, 2015 State Water
Project Delivery Capability Report (2015 SWP Capability Report), July, 2015.
U.S. Bureau of Reclamation- Colorado River Accounting and Water Use Report, Arizona,
California, and Nevada, "Decree Accounting Reports." (Accessed September 2014).
2014 Status Report for the 2010 Coachella Valley Water Management Plan Update, CVWD.
(Accessed July 2015).
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2016 Building Energy Standards for Residential and Non -Residential Buildings, Title 24, Part 6,
and Associated Administrative Regulations in Part 1, California Energy Commission. (Accessed
March 2016).
Malcolm-Pirnie, 2008b. Feasibility Study for Full -Scale Brackish Groundwater Treatment Facility,
prepared for CVWD, October 2008.
100 Travertine Specific Plan Project WSA/WSV