HomeMy WebLinkAbout05-01-2018 Item 09 Waterline Replacements Various Locations 2016
Meeting Date: 5/1/2018
FROM: Daryl R. Grigsby, Director of Public Works
Prepared By: Hai Nguyen, Engineer II
SUBJECT: WATERLINE REPLACEMENT 2016 PROJECT, SPECIFICATION NO. 91436
RECOMMENDATION
1. Approve plans and specifications for the Waterline Replacement 2016 Project,
Specification Number. 91436; and
2. Authorize staff to advertise for bids; and
3. Authorize the City Manager to award the construction contract if the lowest responsible bid
is within the Engineer’s Estimate of $1,877,000.
DISCUSSION
Background
The City’s water distribution system is comprised of 184 miles of pipe with diameters ranging in
size from four inches to 30 inches. Some of the pipes that make up the City’s water distribution
system have been identified as undersized and beyond their useful design l ife. The useful design
life expectancy of waterlines is typically 50 years. Waterline breaks occur with more frequency
with aging waterlines, and the resulting repairs are disruptive to the public and expensive to
repair. Waterline breaks undermine the roadway requiring full depth reconstruction to properly
rehabilitation the pavement.
Replacement of water distribution pipes and related facilities is an ongoing program to replace
aging, substandard and deteriorating infrastructure, with the added benefit of lowering costs and
reducing customer impacts associated with emergency repairs. The main objectives of this
program are to ensure reliable water services, reduce the need for emergency repairs, and to
enhance available fire flows.
Project
This project will replace approximately 5,000 linear feet of waterline on Pacific, Boysen, Chorro
and Sierra streets. The waterlines that will be replaced with this project are substandard and
deteriorated. Their replacement will eliminate capacity limitations improving water flow for fire
protection. Replacing these waterlines will result in lower costs to the City and reduced customer
impacts associated with emergency repairs. Reducing or eliminating the number of required
emergency repairs provides more time for maintenance staff to complete preventive
maintenance, which prolongs the expected service life of Water Distribution facilities and
equipment.
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ENVIRONMENTAL REVIEW
This project is categorically exempt from environmental review pursuant to section 15301 of th e
CEQA Guidelines (Existing Facilities) since it is a maintenance and replacement project. A
Notice of Exemption has been filed through the Community Development Department.
FISCAL IMPACT
Waterline improvements identified in this project are included in the 2015-2017 Financial Plan
page 3-45, and the 2017-19 Financial Plan page E2-153 for the Water Distribution System
Improvements master account. The 2015-2017 Financial Plan allocated $1,560,000 to support
this request, and the 2017-2019 Financial Plan allocated an additional $1,700,000 for this
project. Additional waterline replacements are planned for a future project on Casa, Stenner,
Murray and intersections of Chorro/Meinecke and Chorro/Murray.
Funding for this project is available in the Water Distribution System Improvements Master
Account (90227) which has a current available balance of $3,739,272, which is sufficient to
support this request.
All utility improvement projects are classified as high -risk due to many unknown subsurface
conditions. Previous waterline replacement projects indicate that higher contingencies (20%-
25%) are required to cover the additional cost of modifying unknown utility conflicts and
hazardous excavation encountered during construction. Staff identified 25% contingencies for
this project.
Water Distribution
System
Construction Estimate:$1,877,000
Contingencies (25%):$469,250
Material Testing:$10,000
Printing:$500
Total for Project:$2,356,750
Total funding available $3,739,272
Remaining Balance $1,382,522
Waterline Replacements 2016 (91436)
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ALTERNATIVES
Deny or defer approval to advertise. The City Council may choose to deny or defer the approval
to advertise this project. Staff does not recommend this option, as the water mains included in
this project continue to deteriorate and pose a high risk of catastrophic failure, requiring
expensive repairs.
Attachments:
a - Vicinity Map
b - Council Reading File - 91436 Plans
c - Council Reading File - 91436 Specifications
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VICINITY MAP
WATERLINE REPLACEMENT 2016
N
1" = 1000'
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