HomeMy WebLinkAbout10 WATER MASTER PLAN 05-15-00 NO. 10
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DATE: MAY 15, 2000
TO:
WILLIAM A. HUSTON, CITY MANAGER
FROM: PUBLIC WORKS DEPARTMENT/WATER DIVISION
SUBJECT: CITY OF TUSTIN WATER MASTER PLAN
SUMMARY
The Water Division has completed a Comprehensive Master Plan for the City's Municipal Water
System service area that will provide the basis to ensure that the water system's performance
continues to meet all regulatory and capacity requirements for the twenty-year planning period
from 2000 through 2020. The Master Plan formulates a strategy to minimize dependence on an
imported water supply, improve the groundwater quality in the aquifer, and increase the reliability
of the system. The Water Master Plan has accomplished the following:
· Analyzed and updated water demand projections
· Summarized previous studies evaluating the physical conditions of the system
· Evaluated the sufficiency of the existing system to satisfy operational, fire, and emergency
conditions
The Master Plan also recommends future Capital Improvement Projects to meet projected future
demands in the service area.
RECOMMENDATION
It is recommended that the City Council receive and file the City of Tustin Water Master Plan.
FISCAL IMPACT
None at this time. The Master Plan will be used to develop future Capital Improvement Programs
in conjunction with a financing Plan.
DISCUSSION
The City of Tustin Water Service provides potable water to an 8.4 square mile service area with
an estimated population of 63,600 residents and encompasses the majority of the City along with
unincorporated areas north of the City. The water system consists of two water treatment plants,
6 reservoirs, three booster stations, 12 active groundwater wells, and approximately 170 miles of
pipeline.
In 1992, an aggressive Capital Improvement Program was commenced to construct
approximately $40 million worth of improvements to the storage and distribution components of
the system. Since that time several projects and additional studies have been completed. As a
result, the quality of water .in the aquifer has increased and the City's reliance on imported water
has decreased from 45% in 1992/93 to 15% today. The Water Master-Plan was undertaken to
increase the system's reliability, meet new regulatory requirements, and minimize the cost of
water service by continuing an aggressive program to develop groundwater sources and
treatment facilities that can meet all system demands by utilizing groundwater supplies and
City of Tustin Water Master Plan
May 15, 2000
Page 2
storage reservoirs. The Master Plan has formulated the following recommendations for each
component in the system:
GROUNDWATER WELLS: The Master Plan recommends the construction of three new
groundwater wells and the on-site replacement of the Tustin Avenue Well and Beneta Well.
Permanent generators are recommended at each site to provide .the system with adequate
emergency supply.
RESERVOIRS: The Master Plan recommends the construction of new Main Street Reservoir
(authorization to solicited bids scheduled for July Council meeting) and a new Rawlings
Reservoir. Repairs based on the Daniel Boyle Engineering, Inc. study of 1990 along with
subsequent structural analysis are recommended for the other four reservoirs.
BOOSTER STATIONS: The Master Plan recommends construction of a new booster station at
Rawlings Reservoir (currently scheduled for final walk-thru) and replacement of the Simon Ranch
Booster Station.
DISTRIBUTION SYSTEM: The hydraulic model developed in 1993 was updated to simulate
water distribution system performance. The operating scenarios were selected to cover peak
demand operations, fire flow conditions and reservoirs taken out of service for repair or
replacement. Generally, the system was found to be capable providing water to the majority of
the service area for fire fighting purposes. However, Zone 3, the smallest and highest zone in the
City's service area, would need to utilize imported water from the Southern California Water
Company under emergency operating conditions.
The Master Plan is a dynamic document that will be constantly updated by staff and will be
utilized in developing the annual Capital Improvement Program. ASL Consulting Engineers, the
City's consultant for preparing the Master Plan, will give a brief presentation and the City Council
meeting.
Tim D. Serlet--
Director of Public Works/City Engineer
Jn~ter~'/°~ella
im Water Division Manager
TDS:JS:ccg:Water Master Plan.doc
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