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Appendices
Appendix I Water Supply Assessment
General Plan Update and Associated SPecific Plam EIR
The Planning Center
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Appendices
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General Plan Update and Associated Specific Plans EIR
The Planning Center
DEL ROSA MUTUAL WATER COMPANY
and
WEST TWIN CREEK WATER COMPANY
WATER SUPPLY ASSESSMENT
For
ARROWHEAD SPRINGS DEVELOPMENT
February, 2005
Revised: March, 2005
Revised: 5/13/2005
Prepared By:
DEL ROSA MUTUAL WATER COMPANY
AND
WEST TWIN CREEK WATER COMPANY
24600 Arrowhead Springs Road
San Bernardino. CA 92414
Telephone: (909) 875-1400
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SB 610 PUBLIC WATER SUPPLIER CERTIFICATION
The Del Rosa Mutual Water Company (DRNIWC) is the agency responsible for retail
domestic water supply and the West Twin Creek Water Company (WTCWC) is the
agency responsible for the irrigation water supply to the proposed Arrowhead Springs
Development (project). We have prepared the attached Water Supply Assessment for the
subject project as required by Sections 10901 through Section 10915 of the State Water
Code.
Based on this assessment, we certify that the information and findings including therein
fairly represent the DRMWC's and WTCWC,s ability to meet the long-term water supply
requirements of the DRMWC, including build-out of the Project. There is sufficient water
available to meet the demands of the DRMWC at build-out, through normal, dry and
multiple dry years through the year 2025. The water supply capabilities and
enhancements that would apply to the Project are documented for in the "Domestic
Water, Irrigation Water, Wastewater and Recycled Water Facility Plan for Arrowhead
Springs Property", dated August 2004, and the attached Water Supply Assessment.
This Certification is based upon data maintained by the Del Rosa Mutual Water
Company, West Twin Creek Water Company, San Bernardino Valley Municipal Water
District, San Bernardino County Flood Control District and California Department of
water Resources.
This certification does not guarantee that water will be available on a constant basis as
supply is subject to emergencies, natural disasters and other events not under the control
of the DRMWC or the WTCWC. Water service is also subject to payment of applicable
fees and completion of certain improvements, which may be determined to apply to the
Project.
This certification is non-transferable and expires upon termination of the Specific Plan,
Parcel Map or Tentative Map. This Certification is non-binding during a declared water
shortage or emergency_
Michael Groves, Vice President
Del Rosa Mutual Water Company
Date of Approval
Michael Groves, Vice President
West Twin Creek Water Company
Date of Approval
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T ABLE OF CONTENTS
Description
Page
SECTION 1- INTRODUCTION
1.0 1 Introduction ................................. _ . . . .. . . . . .. . . . . . . . . . . . . .. . . . H .. .5
SECTION 2- WATER DEMAND, SUPPLIES AND PROJECT INFRASTRUCURE
2.01 Population and Water Demand. ..... .., ........ .,. ........ ...... ......... ...7
2.02 Water Rights...................................................................8
2.03 Existing Water Supply............................ ........................ ..11
2.04 Groundwater. ...................................... .................. ..... ....12
2.05 Imported Water...... ........... ................................. ......... ....12
2.06 Recycled Water...... ....... ..... ...... ..... .... ...... ......_ .... .... .........12
2.07 Project Demands and Supplies... ... .... .............. ...... ...... ..... ....12
SECTION 3- RELIABILITY OF WATER SUPPLIES
3.0 I General....................................................................... .15
3.01.A San Bernardino Basin..... ............. ......... ..... .................. ...15
3.0I.B East Twin Creek Watershed... ....... ...... ..... ..... ._.... .......... ...16
3.01.C West Twin Creek Watershed......... """ .............. ............. 17
3.02 Santa Ana regional Water Quality Control Board..................... 17
3.03 Santa Ana Watershed Authority.. .......... .......... ............. ....... 18
3.04 San Bernardino Valley Municipal Water Distri~t. . .. . . . . .,. . . . . . . . . " 19
3.05 San Bernardino Valley Water Conservation District.... .. . . .., . . . . . .. 19
3.06 City of San Bernardino.... . . ... . . . .. . ... .. . . . . .. .. .. ... . .. ... .. . ... .. . .. .. . .20
SECTION 4- WATER SHORTAGE PLANS
4.01 Dcl Rosa Mutual Water Company Water Shortage Plan............... 21
4.02 Water Conservation as a Reliable Water Source..................... ... 21
4.03 Unaccounted-For-Water............ ......... .............................. 22
4.04 Water System Interconnections............ h............................ 22
4.05 Reliability Comparison............ ... ........................ ..... .... ..... .22
SECTION 5- CONCLUSIONS
5.0 1 GeneraL....................................................................... 25
5.02 Water Demand.. .... '" .....,...... ...... ... ...... ......... ... ......... .... ..25
5.03 Water Supply and Demand Projection.<;............... .................. 25
BIBLIOGRAPHY..................................................................... .26
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APPENDIX
West Twin Creek Annual Discharges ............... ._............................... ....27
East Twin Creek Annual Discharges......... ... n.................................... ....28
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SECTION I
INTRODUCTION
1.01 Introduction
The Arrowhead Springs Development (Project) will be planned through a Specific Plan,
which will be processed through the City of San Bernardino. The propose Project is
located partially within the City of San Bernardino, San Bernardino County. The total
project encompasses about 1,916 acres, of which 1,400 acres is devoted to Open
SpacelWatershed Property. The balance of the property, 506 acres will contain the
existing Arrowhead Springs Hotel and proposed development area. The development
area will contain a Conference Center, Spa-Health Club and Swimming Pool, Residential
areas, IS-hole championship sized golf course, International Hotel, Corporate Office
Complex, and a Shopping Complex. The Project is located in the foothills of the San
Bernardino Mountains at the mouth ofWatennan Canyon.
The City of San Bernardino is responsible for the preparation of the Enviromnental
Impact Report (EIR). The EIR includes an assessment of utilities, including water supply.
Recent legislation, Senate Bills 221 and 610, effective January 2002, requires that a
Water Supply Assessment be prepared to document the sufficiency of an available water
supply for the water supplier and the Project. There exist on the property, the Del Rosa
Mutual Water Company (Company), which has the powers to serve dome~iic water and
wastewater services and this Company will be the providing agency. The West Twin
Creek Water Company is also existing and on the property and will be providing the
irrigation water to the Project. The new law requires that a water provider furnish
substantial evidence that water supplies are available to meet the demands of new and
existing customers, through normal, single dry and multiple dry years for a 20-year
period. There will be a holding Company for the DRMWC and the WTCWC called the
Arrowhead Springs Water And Power Company. This holding company will supply the
water for heating and related purposes. The holding Company is owned wholly by the
Project.
The Del Rosa Mutual Water Company has not prepared and adopted an "Urban Water
Management Plan" as required by law since the Company is not providing domestic
water at this time. When domestic service commences, an Urban Water Management
Plan will be prepared and filed with the State of California.
The Del Rosa Mutual Water Company will provide domestic water service to the Project
and no one else except for the City of San Bernardino who currently owns 583 shares.
The balance of the shares, are currently owned by the Project and they will be issued to
the new customers in the Project as they become active. The Project is in control of and
owns all of the shares of stock in the West Twin Creek Water Company and shares will
be distributed to irrigation customers.
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Contained in this report is a discussion on existing Company water demands, projected
Company water demands, entitlements, and existing supplies needed to meet future
demands, In addition, the report includes a discussion of the reliability of each water
supply. Lastly, the report includes a conclusion of the Water Supply Assessment, a list of
reference material and an appendix.
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SECTION 2
WATER DEMAND, SUPPLIES AND PROJECT INFRASTRUCTURE
2.01 Population and Water Demand
Currently, the Project area has a skeleton crew to maintain the properties along with
offices for the firms who are leading the development process for the property owners.
Water is being supplied to the Project area through a Water Pennit from the County of
San Bernardino, Department of Environmental Health. The growth of the Del Rosa
Mutual Water Company and West Twin Creek Water Company will be in direct response
to the development area of the project.
The water use at the present time is for three purposes: Domestic use, irrigation and
heating from the goo-thermal wells on the property. During the calendar years 2001,2002
and 2003, the average use, for these three purposes are: Domestic-81.27 acre-feet;
Irrigation-l,768.33 acre-feet; Heating from geo-thermal wells-28.57 acre-feet. It is
planned that the water currently being utilized for irrigation by the Del Rosa Mutual
Water Company will be converted to Domestic use. The geo-thermal wells will be
continued to be used for on-site heating of structures as it has been for many years and
irrigation water will be developed by the West Twin Creek Water Company from West
Twin Creek surface water sources, recycled wastewater and wells on and off the property
The population and water requirements will be in direct response to the development of
the Project area. There will be a mixture of land uses where there will be a permanent
population and most important, a transient population using the hotels and short term
housing. So as to not distort the population demand for water, the projected population
will be shown along with equivalent dwelling units (EDU's) will be shown over the 20-
year projected water use period. The current projection for build-out of the project is a
10-year period. This is a projection only and is subject to future economic and marketing
conditions as the Project goes forward.
Table 2-1 shows the development of the project along with projected population and the
EDU's that will be developed over the next 20-year period. The requirements for
Domestic and Irrigation water will be shown. The geo-thermal well requirement will
remain constant; however, the development of future geo-thennal wells remains a
probability to reduce the requirement for other energy requirements for heating and
probably for cooling.
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TABLE 2-1
POPULATION AND WATER DEMAND
Year Population EDU's Domestic Irrigation Heating Total
2005 25 N/A 82 1,750 29 1,861
2010 1,920 1,280 918 1,000 29 1,947
2015 3,450 2,405 1,724 1,521 29 3,274
2020 3,962 2,781 1,993 2,042 29 4,064
2025 3,962 2,181 1,993 2,042 29 4,064
Note: All quantities ofwaWr shown in acre-feet
All of the wastewater generated on the Project will be treated on the Project to meet Title
22 standards, recycled and used for irrigation purposes. The estimated quantity of
wastewater at the build out of the project is 977 acre-feet per year. Irrigation water will
be provided by the West Twin Creek Water Company, a Mutual Water Company. It will
be sourced from recycled water from the wastewater treatment plant, from West Twin
Creek, and supplemental wells. There is a wann water well known as the "Steam Cave
Well" which will be utilized for irrigating a fuel break area separating the mountain brush
area from the Project. Del Rosa Mutual Water Company will provide the wastewater
services and after treatment, the recycled water will be transferred to the West Twin
Creek Water Company.
The Arrowhead Springs Development water demands are shown in Table 2-2. The
average annual domestic demand is 1,779,370 gallons per day or 1,993 acre-feet per year.
The maximum day demand is 3.56 mgd and the peak hour demand is 7.17 mgd. The
irrigation demand is estimated at 3.308 mgd during the peak month of July and the annual
requirement is 2,030 acre-feet.
TABLE 2-2
ARROWHEAD SPRINGS DEVELOPMENT WATER DEMANDS
Annual Demand
Domestic (DR.M:WC)
Irrigation (WTCWC)
Heating
1,993 Acre-Feet
2,042 Acre Feet
29 Acre-Feet
Daily Domestic Demands
Average Daily Demand
Maximum Day Demand
Peak Hour Demand
1.78 MGD
3.56 MGD
1.11 MOD
2.02 Water Rights
The Arrowhead Springs Development project is located just northerly of the northerly
line of the adjudication of the San Bernardino Basin through the "Orange COWlty Water
District vs. City of Chino, et al. Case No. 117628 Settlement Documents" and the
physical solutions to this case are set forth in the "Western Municipal Water District vs.
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East San Bernardino County Water District et aI. Case No. 78426 of the COWlty of
Riverside.
The present owner, Campus Crusade For Christ has acquired the Carpenter Right in East
Twin Creek, the majority of shares in the Del Rosa Mutual Water Company and all
shares in the West Twin Creek Water Company (Waterman Canyon Creek). The City of
San Bernardino has 581 Shares in Del Rosa Mutual Water Company. The two mutual
water companies have been diverting water from these sources long before December 19,
1914, when the State Water Commission Act became effective and the appropriators of
surface waters wete required to use the application. permit and license process. All prior
appropriators were not required to use this new process. These are generally known as the
pre-1914 rights.
A Special Use Permit was issued by the United States Department of Agriculture, Forest
Service, which covers 0.05 acres ofland and 0.13 miles of pipeline issued for the purpose
of "maintaining a water transmission conduit, intake dam, service trail and other
appurtenances to convey water from Coldwater Creek to Pennitee's private land". The
Special use permit pertains to a portion of the SW1I4 of the SE1I4 of Section 1. TIN,
R4W and is dated June 1976. The permit supersedes a Special Use Permit designated:
"Campus Crusade for Christ, Water Transmission."
The waters have been significantly utilized by means of a dam located in the Coldwater
Creek (a tributary of East Twin Creek), which diverts water from Coldwater Canyon to
the Arrowhead Springs property through a pipeline. This source of water served the
historic Arrowhead Springs Hotel, outbuildings and grounds for many years prior to 1914
and stopped using domestic water from that source when the State Health Department
required treatment. Irrigation water continued to be supplied and continues to be supplied
from that source today. This water source, is planned to be diverted to a new water
treatment plant.
The Judgment in Case 31798 states that all lands of Arrowhead Springs Corporation,
Ltd., "are contiguous and, except such portions thereof as lie outside of the watershed of
East Twin Creek, are bordering on and have access to, and are riparian to said East Twin
Creek....". East Twin Creek as defined in the Judgment includes such principal
tributaries as Strawberry Creek, Coldwater Creek, Hot Springs Creek and other unnamed
tributaries and springs.
In accordance with information furnished by Ham Hall (1888, p 317) and Scott 77-398,
Del Rosa Mutual Water Company posses a pre-1914 right. The water, by virtue of
Judgment 31798, October 19, 1931, also has adjudicated rights. Del Rosa Mutual, in
addition to diverting water, extracted from ground water supplies. When Del Rosa
Mutual Water Company was transferred to Mr. Warner Hodgden, East San Bernardino
kept and maintained the Del Rosa Mutual well, except the well on the water company's
property at its intake.
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During the period that East San Bernardino County Water District (District) owned
shares in both West Twin Creek Water Company and Del Rosa Mutual Water Company,
District allowed the surface water not used for irrigation in the two Mutual Water
Companies to flow into the East Twin Creek Spreading grounds below 40th Street to
recharge the groundwater basin for later recovery. Water not diverted from West and East
Twin Creeks was allowed to flow downstream where it was percolated into the San
Bernardino or Bunker Hill Basin for later recovery by District, who claimed that portion
of the water right through its proportionate share of stock ownership. Today, District
owns no stock in either West Twin Creek Water Company or Del Rosa Mutual Water
Company.
There are a four decreed water rights in Waterman Canyon, upstream from the
Arrowhead Springs Property in the June 14, 1894 Judgment. These rights are:
M.E. Benson, West Twin Cree~ 10 inches, 15 acres
G.P. Thomas, Cold Creek:, 8 inches, 12 acres
C.L. Embry, Cold Creek, 8 inches, 12 acres
Milton Vale, West Twin Creek, 8 inches, 5 acres
Use of the, above described, water was confmed to certain acreages of apple orchards and
incidental domestic use by the above users.
Sather Banking Co., West Twin Creek, 4 inches, not restricted was confined to
domestic, sanitarium, stock watering, bathing and ornamental uses on the
Waterman Ranch, which was and is a part of the Arrowhead Springs Hotel
Property. The Judgment also decreed this company with this use of the stream
flow for bottled water.
West Twin Creek Water Company., West Twin Creek-Unlimited. This Company
was decreed the right to use all of the water of West Twin Creek after the above-
mentioned uses were satisfied.
Arrowhead Reservoir and Power Company, West Twin Creek, 1 inch, Water
Trough, probably at the old Lower Toll House where Waterman Canyon Road
first crossed Waterman Creek.
The rights shown above substantiate that the Arrowhead Springs Development Project
controls the water in West Twin Creek (Waterman Canyon) and East twin Creek through
the ownership of the Stock in West Twin Creek Water Company, Del Rosa Mutual Water
Company and rights obtained through the ownership of the property.
It will be the duty of West Twin Creek to patrol the upper reaches of Waterman Canyon
Creek to see that, except by the aforementioned water right holders, no water is taken
from the stream
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2.03 Existing Water Supply
Currently, the water supply to the Project area is from a private, single owner water
system under permit from the County of San Bernardino, Department of Environmental
Health. The Domestic Water supply is from wells constructed on the Project property.
Irrigation water is from surface water supplies in Coldwater Canyon and East and West
Twin Creeks. Water is produced from geo-thermal wells for use in heating the Hotel,
supporting structures and swimming pool. A listing of the Domestic, Heating and
Irrigation water supplies are shown separately in Tables 2-3 through Table 2-5 below:
TABLE 2-3
EXISTING DOMESTIC WATER SUPPLY
All quantities shown in acre. feet
Well Name 2001 2002
Rods' Well 6.2 5.8
Football Field 4.5 4.3
Rowan Well 58.0 55.0
Strawberry Creek Well 17.6 17.3
TOTAL 86.3 82.4
2003
4.9
4.1
51.0
17.1
77.1
TABLE 2-4
EXISTING GEO-THERMAL WATER SUPPI..Y
All quantities shown in acre-feet
Well Name
2001
2002
2003
Hot Well
Goo Mud Bath Well
TOTAL
11.3
17.4
28.7
11.4
17.1
28.4
11.5
17.0
28.5
TABLE 2-5
EXISTING IRRIGATION SUPPLY
All quantities shown in acre-feet
Source Name
2001
2002
2003
Del Rosa Mutual
1,735
1,785
1,785
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2.04 Groundwater
The domestic water for the Project area is from wells constructed in the boundaries of the
site. These wells are relatively shallow and are constructed into the fractured rock
underlying the soil mantle. The wells are low producers but are capable of furnishing the
needed supply at this time. Domestic water production from these wells for the Project
will not meet State Health Department regulations and the supply must be from other
sources.
The Del Rosa Mutual Water Company existing service area encompasses parts of the San
Bernardino Basin which overlays significant grOtmdwater basins where the mutual has
produced water in the past. The East Twin Creek Spreading Grounds lies over the San
Bernardino Basin where the water not diverted for either domestic or irrigation uses will
percolate into the basin. New wells constructed by Del Rosa Mutual Water Company will
recover these percolated flows to provide water to the Project.
2.05 Imported Water
The Del Rosa Mutual Water Company's existing service area is within the San
Bernardino Valley Municipal Water District who was fonned to be the distributor of
State Project Water in the area. The district has contracted with the State of California for
102,600 acre-feet of State Project Water annually.
The San Bernardino Valley Municipal Water District has constructed the "Foothill
Feeder" pipeline to provide water to the easterly part of the San Bernardino Valley. The
San Gorgonio Pass Water Agency contracted for capacity in this pipeline for the transport
of State Project Water to their agency. This pipeline is located southerly of the Project
and discussions may be held between the Project owners and the San Bernardino Valley
Municipal Water District regarding any future connections, if needed.
2.06 Recycled Water
The Arrowhead Springs Development Project plans to construct a Wastewater Treatment
Plant, which will treat all of the wastewater to meet Title 22; California Administrative
Code and utilize all of the effluent for irrigation purposes in accordance with the
regulations of the State Department of Public Health, Drinking Water Division. The use
of the effluent will be in locations where runoff will not reach waterways of the United
States; but remain within the project area. It is presently projected that 977 acre-feet per
year of recycled water will be available when the ProjeCt is completed and occupied.
2.07 Project Demands and Supplies
The Del Rosa Mutual Water Company and West Twin Creek Water Company have rights
to develop additional water and will require the developer to pay impact fees and/or
construct infrastructure to develop local water to meet the Project demands. To serve the
Arrowhead Springs Development, new facilities are required for water service. To serve
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the Project, The "Domestic Water, Irrigation Water, Wastewater and Recycled Water
Facility Plan for Arrowhead Springs Property, Dated August, 2004" was prepared to
determine the water demands and facilities to serve the Project.
Facility improvements required to serve the Arrowhead Springs Development
Project are:
Domestic Water
. Two or more vertical wells constructed in the San Bernardino Basin
. 0.5 MOD surface water treatment plant
. 1.0 MGD surface water treatment plant
. Two-O.75 MG reservoirs
. One 3.20 MO reservoir
. One 0.50 MG reservoir
. One 3,SOO GPM booster station
. One 3,500 GPM booster station
. One 500 GPM booster station
. One 200 GPM booster station
. Pipelines ranging in size from IS-inch to 8-incb in diameter
. Appurtenances such as pressure regulators, fire hydrants, blow-offs,
air & vacuum assemblies and metered water services and other
accessones.
Irrigation Water:
. Construction of a new weir in West Twin Creek (now Waterman
Canyon Creek) and contract with the USGS to measure the flows
passing the weir.
. Re-construct a water intake above the new measuring weir to divert
flows during periods when water is flowing in the stream for
irrigation use.
. Install a pump in the Steam Cave Well to discharge water to
reservoir(s) providing water to the fuel break area.
. Construct a series of reservoirs to receive irrigation water to provide
irrigation service to the area.
. Provide a network of pipeline of various sizes to convey the
irrigation water to the reservoirs and point of use for the various
irrigation water users.
. Construct booster stations at needed locations to move the irrigation
water to the reservoirs for use.
. Construct an interconnection with the Del Rosa Mutual Water
Company recycled water pipeline to receive and integrate the
recycled water into the West Twin Creek Water Company Irrigation
System.
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The Del Rosa Mutual Water Company and West Twin Creek Water Company will both
need to realign the service areas for each company. The final realignment will include the
boundary of the lands within the Arrowhead Springs Development, including the
watershed lands and offsite facilities. This win be included with the petition to activate
any necessary functions such as domestic water and wastewater services on the project.
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SECTION 3
RELIABILITY OF WATER SUPPLIES
3.01 General
The Del Rosa Mutual Water Company, the West Twin Creek Water Company and the
region are facing increasing challenges and opportunities in its role as stewards of water
resources in the region. Each water basin and drainage area from which water is acquired
has unique challenges. Each area is described below:
3.01.A San Bernardino Basin
The Del Rosa Mutual Water Company and the West Twin Creek Water Company
plans to extract water from the San Bernardino Basin in a quantity matching the
amount percolated from waters discharged from West and East Twin Creeks and
percolated into the San Bernardino Basin at the East Twin Creek Settling Basins,
owned and operated by the San Bernardino County Flood Control District. The
Company will be working in cooperation with the water management agencies
within the San Bernardino Basin to achieve water supply reliability, water quality
and watershed management goals for the Santa Ana River Watershed.
The Southern California region faces a challenge between satisfying its water
requirements and securing its fInn water supplies. Increased environmental
regulations and collaborative competition for water outside the region have
resulted in reduced supplies of imported water. Continued population and
economic growth increases the water demand within the region, putting even a
larger burden on local supplies.
Within the San Bernardino Basin, there are four areas of pollution of the
groundwater: (1) Lockheed PerchlorateNOC Plume; (2) Norton Air Force VOC
Plume; (3) Santa Fe RXR VOC Plume; and, (4) the Camp OnolNewmark Plume.
The Santa Ana Regional Water Quality Control Board is working with the
polluters to clean up these plumes. The City of San Bernardino is working on a
proposed Consent Decree in City of San Bernardino VS. United States of America,
C.D. Cat Case No. CV 96-8867 (MRP); State of California, on behalf of the
Department of Toxic Substances Control VS. United States of America, C.D. Cal.
Case No. CV 96-5205 (MRP) (Consolidated), with the Environmental Protection
Agency. A Management Zone is proposed in the San Bernardino Basin, which
includes areas of controlled water extraction and water spreading. The spreading
of the West and East Twin Creeks water in the East Twin Creek Spreading Ponds
is within the management zone for water spreading. The construction of proposed
wells will be outside the Management Zone. The wells will be across gradient
from the Camp Ono/Newmark Plume, which concerns the Management Zone.
The Del Rosa Mutual Water Company and West Twin Creek Water Company
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The Metropolitan Water District of Southern California (MWD) installed a
pipeline across East Twin Creek and constructed a tunnel through Harrison
Mountain for delivery of State Water. The tunnel has been constructed with
concrete plates and the annulus between the concrete liner and the tunnel wall has
been grouted solid. During construction of the tunnel, the water is allowed to be
discharged outside the tunnel. At this time, we do not know the effects this may
have on any wells or springs. The court in the condemnation of the right-of~way
has retained jurisdiction in this matter and a monitoring program has been set up
and the results given to the judge in this matter. Until a determination on the
effects of the tunnel is made, MWD will remain a defendant and will be required
to make good any damages.
Water from the East Twin Creek is not a constant flow but will vary during the
year and from year to year. By percolating water into the San Bernardino Basin
and pumping out a like amount as needed, a reserve amount will be maintained so
the highs and lows of the surface water flow will be evened out over time.
The long-term average (78 years) has averaged 4,262 acre-feet per year. The
listing of the recorded flows from 1921 through 1998 is attached in the appendix.
3.01.C West Twin Creek (Waterman Canyon) Drainage
Within the West Twin Creek Drainage, There is human habitation along the
stream in Waterman Canyon and wastewater disposal is by septic tanks and
underground disposaL Most likely, the effluent from the underground disposal
systems, are intruding into the stream flow. This will deter the diversion of this
water and treatment for domestic purposes. For this reason, the West Twin Creek
flows will be used tor irrigation water to supplement the recycled water from the
wastewater treatment plant. Excess flows will be allowed to percolate into the
East Twin Creek Spreading Basin for future extraction.
The long-term average (79 years) has averaged 2,491 acre-feet per year. The
listing of the recorded flows from 1920 through 1998 is attached in the Appendix.
3.02 Santa Ana Regional Water Quality Control Board
The Santa Ana Regional Water Quality Control Board (SARWQCB) is responsible for
the development and enforcement of water quality objectives to meet the requirements of
the Federal Clean Water Act, California Porter-Cologne Act and the National Pollution
Discharge Elimination System (NPDES).
In 1975, the SARWQCB completed the Water Quality Control Plan for the Upper portion
of the Santa Ana Watershed (above Prado Dam). The plan outlines specific water quality
management actions to address water quality. These actions include the construction of a
large well field and desalters in the lower part of the basin to extract and treat poor
quality, the construction of a pipeline to export brines from the upper basin to the ocean,
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and the use of large volumes of low total dissolved solids water for groundwater
recharge. The desalter water projects provide (through treatment) unusable water to be
usable for potable water purposes.
The SARWQCB has been monitoring the cleanup of the plumes of contaminates in the
San Bernardino Basin. Contaminated water is being pumped from the basin and treated
so it can be used for potable purposes. The with-drawl of this water is slowing the
migration of the water and reducing the total amount of contaminated water in the basin.
In some cases, the original polluter of the water is paying for the cleanup.
Since 1975, a brine line (Santa Ana Interceptor or SARI line) has been constructed and
has been in operation to receive brine and conduct it to the ocean. In addition, the
Arlington Desalter removes the salts by reverse osmosis and the resulting brine that is
removed is placed in the SARlline. The finished water is of potable quality.
3.03 Santa Ana Watershed Authority
The Santa Ana Watershed Authority (SAWPA) was formed in 1972 as a joint powers
agency for the purpose of coordinating regional planning within the Santa Ana Watershed
to address water quality and supply improvements. SA WP A is made up of five major
water supply and wastewater agencies within the Santa Ana Watershed: Eastern
Municipal Water District, Inland Empire Utilities District, Orange County Water District,
San Bernardino Valley Municipal Water District and Western Municipal Water District.
Since the early 1970's SA WP A has held a key role in the development and update of the
Regional Basin Plan for the Santa Ana Regional Water Quality Control Board. SA WPA
conducts water related investigations and planning studies and builds facilities needed for
regional water supply, wastewater treatment and water quality remediation. Current
studies include the Chino Basin Water Management Study, The Colton-Riverside
Conjunctive Use Project and an investigation of water quality in Lake Elsinore and
studies on the nitrogen and organic carbon levels in the Prado Basin.
To facilitate development of improvements to the local water system, SA WPA adopted
an Integrated Resource Plan in June 1998. SA WP A conducted a stakeholder process,
which resulted in identifying individual potential projects with a total estimated cost of
one billion dollars. The State Water Bond Act (Proposition 13), was approved by voters
in March 2000. This act included 235 million dollars to the Southern California
Integrated Watershed Program (SCIWP). On July 17, 2000, the State Water Resources
Control Board (SWRCB) entered into a memorandum of understanding to set forth
general procedures and criteria for selecting projects to be funded by SCIWP for the
Santa Ana Watershed. On August 01,2000, SAWPA approved an Initial Project Priority
List of 44 projects with an estimated cost of 689 million dollars, and adopted a policy to
ensure that the list is reviewed periodically to provide for timely and cost effective use of
the funds.
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3.04 San Bernardino Valley Municipal Water District
The San Bernardino Valley Municipal Water District (SBVMWD) was formed for
managing the water resources of the San Bernardino Basin and contracting for State
Project Water with the State Water Resources Control Board. SBVMWD has contracted
for 102,600 acre-feet of State Project Water annually to supplement the natural water
supply of the area. SBVMWD has participated with the San Gorgonio Pass Water
Agency for capacity in a portion of the pipeline that delivers water to the pass along with
additional pipelines in the area to deliver water to local suppliers and area for
groundwater recharge.
The SBVMWD and Western Municipal Water District (WMWD) have submitted an
application for storm waters stored behind the new Seven Oaks Dam, IDcated near the
mouth of the Santa Ana Canyon, controlling waters in the Santa Ana River during storm
flows. If successful, the SBVMWD would use 72 percent of the water with WMWD
using the other 28 percent (Percentages derived from the 1969 settlement). WMWD is
currently reviewing alternatives for taking delivery of the water from Seven Oaks Dam
and State Water stored in the San Bernardino Basin via Metropolitan Water District of
Southern California. One alternative involves taking delivery of the water from the
Bunker Hill Pressure Zone near I-1O/I-215 iriterchange in exchange for Seven Oaks
water, from and/or State Project Water being spread in the San Bernardino Basin Area.
This alternative would require construction of a pipeline from WMWD to the pressure
zone in the Bunker Hill Basin. WMWD has been reviewing alignment alternatives and
has tentatively named the pipeline "The Riverside~Corona Feeder". This pipeline could
be used by the City of Riverside to obtain more water from the Pressure Zone. 1his
additional production from the Pressure Zone would help the SBVMWD better manage
the San Bernardino Basin area The SBVMWD may be able to save money by
participating in the Riverside-Corona Feeder.
The SBVMWD has facilities in place to transport water to the Mouth of the Santa And
Canyon and percolate water into the alluvial area of the streambed and have done so in
the past.
SBVMWD has been active in the planning for the future facilities and water supplies in
the San Bernardino Basin to ensure that a viable supply of water is available for the local
water supply agencies.
3.05 San Bernardino Valley Water Conservation District
The San Bernardino Valley Water Conservation District (SBVWCD) was formed to
protect and replenish the San Bernardino Groundwater Basin with rainfall and storm-
water [TOm the drainage area to the Santa Ana River and Mill Creek in the areas below
the mouth of the Santa Ana Canyon. SBVWCD uses a system of percolation ponds and
spreading grounds to augment the natural capacity of the region to capture runoff for the
recharge of the groundwater basin. SBVWCD promotes water conservation through
public education programs.
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3.06 City of San Bernardino
The City of San Bernardino (CSB) with the aid of the United States Environmental
Protection Agency (EP A) has taken on the task of removing the polluted water from the
Camp OnolNewmark Plume, treating the water to drinking water standards thus slowing
or stopping the migration of the phune. The CSB is in the process of completing the
"Agreement to Develop and Adopt an Institutional Controls Groundwater Management
program," ("Bunker Hill Purveyors Agreement"). A very general location of the
"Management Zone" proposed by the CSB is the City Limits line on the North, Mill
Street on the South, San Jacinto Fault on the West and Harrison Avenue on the East.
The "Management Area" encompasses that segment of the Arrowhead Springs
Development currently within the City Limits of CSB. The "Bunker Hill Purveyors
Agreement" will place controls on the development of wells and extraction of water
within the Management Zone along with the spreading of water.
Wells proposed by the Arrowhead Springs Development are planned easterly of Harrison
Street and are outside the management zone. The spreading and percolation of waters
from East and West Twin Creeks into the East Twin Creek Spreading Basin is within the
Management Zone.
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SECTION 4
WATER SHORTAGE PLANS
4.01 Del Rosa Mutual Water Company Water Shortage Contingency Plan
The Del Rosa Mutual Water Company has not prepared a "Water Shortage Contingency
Plan" since it is not yet providing the service of domestic water. During the planning and
implementation of the water system and Water Company, the following items are
proposed:
. Create and maintain an "Emergency Fund" within the Water Company so monies
are available immediately in times of emergency and respond to the emergency so
that a wait for funding is not a deterrent.
. Create and maintain a "Contamination Fund" within the Water Company so
monies are available to respond to the possibility of contamination reaching water
supply points and maintain a drinking water supply.
. Within the operations of the water system, install a SCADA System that will
include notification of water company persOIUlel in case of operations or
equipment breakdown 24 hours a day so company response is immediate to
maintain a constant supply of water. This will include any unauthorized entry into
any pumping plant or storage facility of the Water Company. This is done to
prevent many of the water outages. There will be earth movement detectors to
shut down water storage facilities in case of major earthquakes, saving water in
storage for further use.
. Identify alternate sources of water so if an emergency does arrive, the route to
follow for additional supplies is set out. Alternatives sources of water would be
from additional wells constructed in the San Bernardino Basin and purchase of
State Project Water through the San Bernardino Valley Municipal Water District.
Even though not required, West Twin Creek Water Company will prepare a Water
Emergency Plan so the company will have direction where to go to develop additional
somccs of water. Additional water supply could be from the construction of wells in the
San Bernardino Basin and the purchase of State Water from the San Bernardino Valley
Municipal Water District.
4.02 Water Conservation as a Reliable Water Source
An active water conservation plan and education must be adopted by the Water Company
to reduce the wasting of water. During construction of structures on the Project, water
saving devices such as low water use toilets, showerheads and faucets that shut off when
no one is using the water are large sources of waste.
On-site landscaping should require draught tolerant plants and drip irrigation should be
requested by the water company to create a water-wise irrigation program. The Water
Company should prepare a "Water Conservation Hints" booklet that would be given to
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developers and new owners of property on the Project. Many of these hints are available
through the American Water Works Association and other regional water agencies.
The Water Company needs to initiate a "In-Home-Water-Audit" program to review a
customer's in-home and landscape water use and habits. The audit can be performed at
either the request of the customer or may be suggested by office personnel if a higher
than normal water meter reading has been verified. Once an audit has been perform~
the Water Company will follow up and check the results of suggestions and
recommendations.
4.03 Unaccounted-For-Water
Upon the start of operations, the Water Company must review unaccounted-for-water in
the domestic and irrigation water systems. A continuous accounting of the water source
production against the water delivered to customers will indicate many cases of wasted
water. A new water system should continuously have an unaccounted-for-water amoWlt
less than three percent of the water production. After the system has been in operation,
the amount should not be grater than five percent.
4.04 Water System Interconnections
The Del Rosa Mutual Water Company and the CSB may wish to implement a connection
between the two water systems. The CSB owns shares in the Water Company and their
water in accordance with the share ownership could be transferred to them and in case of
an emergency in the water company, water from the CSB could be transferred to the
domestic water system. Any connection between the two would require an agreement for
water rates of flow, quantities and payment of water.
4.05 Reliability Comparison
There has been insufficient water use during the past to compare with the requirements
for the Arrowhead Springs Development Project. 'Ibe project will require 4,064 acre-feet
of water per year with a water source operation time not to exceed I8-hours per day. If
the water production is needed to operate 24 hours per day, the production would be
4,436 acre-feet per year. This is of course dependent upon the completion of the required
capacities for water production.
Table 4-1 shows the water demand in the Del Rosa Mutual Water Company for an
average or "normal" water year, a single dry year and multiple dry years. The
Metropolitan Water District of Southern California data shows that the San Bernardino
area, being a semi-arid region, that during periods of dry weather, will demand
approximately eight (8) percent more urban water use than a '"normal" weather year.
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TABLE 4-1
W ATER SUPPLY ASSESSMENT
DEL ROSAMUTAL WATER COMPANY
PROPOSED WATER DEMAND-WATER SUPPLY RELIABILITY
All quantities shown in acre-feet per year
Source Water Average-Normal Single Dry Multiple Dry Years
Supply Water Year Year Year 1 Year 2 Year 3
All Sources # 2660 2,660 2,660 2,660 2,660
Total Demand 1,993 2,152 2,152 2,152 2,152
Surplus Supply 667 508 508 508 508
Total demand single and multiple dry years'" J,08
# Supply of 3,0 J 5 acre-feet of water can be available by pumping wells 24 hours per day
TABLE 4-2
WATER SUPPLY ASSESSMENT
WEST TWIN CREEK WATER COMPANY
PROPOSED WATER DEMAND-WATER SUPPLY RELIABILITY
All Quantities Shown in Acre-Feet per Year
Source Water Average-Normal Single Dry Multiple Dry Years
Supply Water Year Year Year 1 Year 2 Year 3
All Sources # 2,240 2.240 2,240 2,240 2,240
Total Demand 2,042 2,205 2,205 2,205 2,025
Surplus Supply 198 35 35 35 35
Total demand single and multiple dry years'" 1.08
# Supply of 2,257 acre-feet of water can be made available by pumping wells 24 hours per day
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TABLE 4-3
WATER SUPPLY SOURCES
WEST TWIN CREEK AND DEL ROSA MlITUAL WATER COMPANY
All quantities showu iD acre-feet per year
West Twin Creek Water Company
TOTAL
AMOUNT
13
977
600
650
2,240
LOCATION
Steam Cave Well
Recycled Water
West Twin Creek
San Bernardino Basin Wells
Del Rosa Mutual Water Company
LOCA nON
AMOUNT
TOTAL
536
1,059
1.065
2,660
Coldwater Creek Diversion
Strawberry Creek Diversion
San Bernardino Basin Wells
Note: Water source supplies will vary due to actual flows in the respective streams and
the changes will be made up from wells in the San Bernardino Basin, pumping water
percolated under each company's individual rights.
Hot water will continue to be produced from the Geo Mud Bath and Hot wells as in the
past. Water production can be increased in the Hot well and there are other Wlused geo-
thermal wells in the area, which could be equipped and operated.
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SECTION 5
CONCLUSIONS
5.01 General
The Del Rosa Mutual Water Company (DRMWC) and West Twin Creek Water
Company (WTCWC) will optimize their water though an integrated resource approach,
utilizing available water programs and projects. The DRMWC and WTCWC will receive
their water from surface water and groundwater sources; however, wastewater will be
recycled to provide a source in-lieu of surface and/or groundwater for irrigation.
Complexities and continuing refinement in groundwater management and rights and
challenges of imported water reliability make analysis of water demand and supply
complicated. This water supply analysis is considered in a point in time when known
future projects in concept are yet to be designed. Therefore, water supply assessment
should be a part of the on~going planning efforts of the DRMWC and WTCWC to
optimize its' water resources program.
4.02 Water Demand
The DRMWC current average water demand over the past three (3) years has averaged
about 1,850 acre-feet per year. At build-out of the Arrowhead Springs Development, the
project will increase demand on the DRMWC by approximately 144 acre-feet. The
WTCWC has been diverting water for the construction of the MWD tunnel and utilizing
some supplies for irrigation. There have been no records maintained of the quantities
used during this period.
4.03 Water Supply and Demand Projections
Analysis of water demand and supply projections for the DRMWC, and WTCWC,
including the Arrowhead Springs Development, demonstrate that projected water
supplies could exceed demands through the year 2025. These projections consider land
use, water development, conversion projects and water conservation.
The DRMWC has additional opportunities to increase the water supply through the
following measures: (1) utilize imported State Project Water from the San Bernardino
Valley Municipal Water District; (2) purchase additional water rights ifrequired; and, (3)
Continue to percolate the waters from East and West Twin Creeks in East Twin Creek
Spreading Basin and maintain accurate records of the quantities percolated for future
with-drawL Collectively, these additional options will enable the DRlVl.WC to increase
water supply to exceed now and into the future.
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BmLIOGRAPHY
The following documents were used in conjunction with the San Bernardino Valley
Municipal Water District, in preparation ofthis water supply assessment:
1. Del Rosa Mutual Water Company water production records
2. West Twin Creek Water Company water production records
3. Domestic Water, Irrigation Water, Wastewater and Recycled Water Facility Pian
For Arrowhead Property, dated August, 2004
4. USGS stream flow measurements for East Twin Creek and West Twin Creek
5. Water production records at Arrowhead Springs Hotel
6. Settlement Documents, Orange County Water District YS. City of Chino, et al.
Case No. 117628, Superior court of the State of California, for the County of
Orange
7. Western-San Bernardino Watermaster Western Municipal Water District.et al. vs.
East San Bernardino County Water District et aI., Case No. 78426, County of
Riverside, Volume III, Judgment, Related Documents and Annual reports,
2000/0 I to present.
8. Santa Ana Watermaster, Orange County Water District Ys. City of Chino et aL,
Case No. 117628, County of Orange, Volume III, Judgment, Related Documents
and Annual. Reports, 2000/0 I-present.
9. Water Quality Control Plan, Santa Ana River Basin (8), California Regional
Water Quality Control Board, Santa Ana Region.
10. Development and Use of a Mathematical Model of the San Bernardino Valley
Groundwater Basin, USGS Open File report 80-576.
I-Zg