HomeMy WebLinkAbout04-16-2019 Item 11, 2019 Sewer Lining Project Department Name: Public Works
Cost Center: 6102
For Agenda of: April 16, 2019
Placement: Consent
Estimated Time: N/A
FROM: Daryl Grigsby, Public Works Director
Prepared By: Hai Nguyen, Engineer III
SUBJECT: ADVERTISE SEWER LINING PROJECT 2019, SPECIFICATION NO. 91641
RECOMMENDATION
1. Approve the project plans (Attachment A) and specifications (Attachment B) for the Sewer
Lining Project 2019, Specification Number 91641; and
2. Authorize staff to advertise for bids; and
3. Authorize the City Manager to award the construction contract for the bid total if the lowest
responsible bid is within the Engineer’s Estimate of $180,000.
DISCUSSION
Background
Replacement or repair of aging, deteriorating, or deficient wastewater collection pipelines is part
of an ongoing sewer infrastructure maintenance program. This program has several objectives
including providing uninterrupted sewage flow, eliminating potential health hazards and/or
effluent leakage, reducing the need for emergency repairs, and reducing maintenance
requirements. Furthermore, repairing defective components of the City’s wastewater collection
systems will reduce the infiltration/inflow of groundwater and surface runoff into the collection
system thereby reducing operational costs and the potential for o verflows.
The Sewer Lining Project 2019 will accomplish these objectives for part of the City’s wastewater
collection system.
Project
The Project proposes rehabilitat ion of 1,120 feet of existing vitrified clay sewer pipe installed in
the mid to late 1950s in an easement area adjacent to Albert Drive (Attachment C). The existing
pipelines have severe root intrusion requiring annual maintenance and the easement area has
limited access. The existing pipelines were video inspected and confirmed to be 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. 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 to traditional open
trench replacement construction, and it will be less disruptive to traffic and the community.
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Previous Council or Advisory Body Action
This project was identified in the 2017-19 Financial Plan that was approved by Council.
Policy Context
The City Council approved the Wastewater Collection System Infrastructure Renewal Strategy in
January 2016. The plan identified a strategy for prioritizing pipeline replacement/rehabilitation
effort s in the wastewater collection system to serve existing customers and future development in
the City.
Additionally, per the October 2018 Financial Management Manual, Council approval is required
for Public Projects that cost over $175,000.
Public Engagement
Public engagement was done during the initial identification of this project to be included in the
2017-19 Financial Plan. This an important public infrastructure project and is necessary for the
general health and welfare of the public.
CONCURRENCE
There is concurrence from the Utilities Department through their review of the project plans and
special provisions.
ENVIRONMENTAL REVIEW
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 Development Department.
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FISCAL IMPACT
Budgeted: Yes Budget Year: 2017-19
Funding Identified: Yes
Fiscal Analysis:
The 2017-2019 Financial Plan, pages E2-142, allocated $456,000 for this Project Account
(91641) which has a current ba lance of $660,000 and is sufficient to support this request of
$221,500. Remaining funds are planned to be utilized for upcoming sewer pipe rehabilitation
projects on Walnut, Morro, and Slack Streets.
ALTERNATIVES
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 wastewater 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 - 91641 Plans
b - Council Reading File - 91641 Specifications
c - Project Vicinity Map
Construction Estimate:$180,000
Contingencies (20%):$36,000
Material Testing:$5,000
Printing:$500
Total for Project:$221,500
Total funding available (91641)$660,000
Remaining Balance $438,500
Sewer Lining Project 2019 (91641)
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SEWER LINING
PROJECT 2019
1 OF 1
0
SCALE IN FEET
800
PROJECT
LOCATION
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