HomeMy WebLinkAbout06-05-2018 Item 14 Sewer Lining Project 2016 Meeting Date: 6/5/2018
FROM: Daryl Grigsby, Director of Public Works
Prepared By: Violeta Esparza-Reniere, Engineer III
SUBJECT: SEWER-LINING 2016, SPECIFICATION NO. 91421
RECOMMENDATION
1. Approve Plans and Specifications Sewer Lining 2016, Specification No. 91421; and
2. Authorize staff to advertise for bids and authorize the City Manager to award the construction
contract if the lowest responsible bid is within the Public Disclosed Funding Amount of
$606,500.
DISCUSSION
Replacement and rehabilitation of wastewater collection pipes is part of an ongoing program to
maintain aging and deteriorating infrastructure. This program has several objectives: 1) ensure
reliable removal of waste; 2) reduce the need for emergency repairs; 3) reduce the need for
preventive maintenance; and 4) ensure uninterrupted wastewater flow without health hazard or
effluent leakage. This project will accomplish these objectives for part of the City’s wastewater
collection system.
The existing pipes planned for rehabilitation work have been video inspect ed and confirmed to
have reached the end of their useful life and are excellent candidates for the cure-in-place pipe
(CIPP) polyester lining. CIPP is a trenchless rehabilitation method used to repair and extend the
useful life of pipes. The CIPP process consists of inserting a resin-saturated tube into the
pipeline. The resin hardens and creates a new pipe within the existing pipe, with sufficient
capacity to handle projected flowrates. In order to ensure the quality of CIPP work, electro
scanning testing is completed to verify the quality of the installation. There are many advantages
of using the CIPP method in lieu of traditional open trench replacement methods. CIPP lining of
the existing pipe will result in a reduced construction period as compared t o traditional open
trench replacement construction, and it will be less disruptive to traffic, residents, and
businesses.
The proposed project will rehabilitate 4,350 feet of existing sewer pipe in five different locations.
The project is divided into a base bid with two additive alternates. The base bid work is planned
for an easement area adjacent to Chorro Street, and Benton Easement. The additive alternate
locations are planned for the Broad and Mission segment, and Mill Street.
ENVIRONMENTAL REVEW
This project is categorically exempt from environmental review pursuant to Section 15301 of the
CEQA Guidelines (Existing Facilities) since it is a maintenance and replacement project. A
Notice of Exemption has been filed through the Community Develo pment Department.
Packet Pg. 121
Item 14
FISCAL IMPACT
This project is identified in the 2015-17 Financial Plan, on page 3-57 as part of the approved
Wastewater Collection System Improvements projects. The project is structured with a Base Bid
and two Additive Alternatives to maximize the scope of the rehabilitation project within the
available funding. The strategy is to award the contract with the Base Bid and as many of the
Additive Alternatives as funding will allow, up to the Publicly Disclosed Funding amount of
$606,500 in compliance with Public Contract Code Section 20103.8(c). The Base Bid portion
includes the Benton and Chorro Easements. The additive alternatives include additional lining on
Mission Lane and Mill Street.
As outlined below, $695,000 was identified for the project. The Collection System
Improvements Master account (90239) currently has a balance of $2,710,000 to support this
request. A budget amendment request will be processed to transfer the appropriate project
funding to the Sewer Lining 2016 project (91421) from the master account at the time of contract
award.
Sewer Lining 2016, Specification #91421
Base Bid Estimate:$233,700
Additive Alternate A Estimate:$184,300
Additive Alternate B Estimate:$188,500
Total Project Estimate: $606,500
Contingencies:$83,000
Material Testing:$5,000
Printing and Misc:$500
Total Project Estimate $695,000
Collection System Impr.Master Account
(90239) Current Balance:$2,710,000
Remaining Balance after Project:$2,015,000
ALTERNATIVE
Deny authorization to advertise. The City Council may choose not to authorize project
advertisement. Staff does not recommend this alternative. Further delay of rehabilitating these
segments of waste water collection sewer pipe will only increase the costs associated with the
maintenance, emergency repair after complete failure and construction phase of work.
Attachments:
a - Council Reading File - 91421 Sewer Lining Project 2016 Specials
b - Council Reading File -91421 Sewer Lining Project 2016 Plans
Packet Pg. 122
Item 14