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Title:
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Approval of Final Plans and Specifications and Authorization to Publish a Notice Inviting Bids for Sewer Main Lining Rehabilitation Project (Phase II), P-906.
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City of Culver City, California
Agenda Item Report
Page 1 of 2
RECOMMENDATION:
Staff recommends the City Council approve the final plans and specifications and
authorize the publication of a notice inviting bids for construction of the Sewer Main
Lining Rehabilitation Project (Phase II), P-906.
BACKGROUND:
Since 2009, Public Works has been utilizing trenchless technology to rehabilitate
sewer mains with minimum impacts on private properties. Most of the sewer mains
contained in this project are located along the rear property line easements where
they are difficult to access and maintain. Constructed between the 1920’s and the
1940’s, these aging sewer mains exhibit root damage, cracked pipes, protruding
laterals, and offset joints. Approximately 7.5 miles (out of the total 90 miles of city
sewer mains) will be rehabilitated with this phase of the sewer lining project.
DISCUSSION:
Engineering staff has completed the design and preparation of the plans and
specifications for the sewer rehabilitation projects. The City‘s Information
Technology GIS Division staff assisted with the preparation of the plan sheets. A
peer review was conducted by Dudek, on-call engineering consultant.
After the study of the latest Closed Circuit Television (CCTV) inspection of the
existing sewer mains, it was determined that the sewer pipes to be rehabilitated with
Meeting Date: 05/02/11 Item Number: C-5
CITY COUNCIL AGENDA ITEM: Approval of Final Plans and Specifications and
Authorization to Publish a Notice Inviting Bids for Sewer Main Lining
Rehabilitation Project (Phase II), P-906.
Contact Person/Dept.: Hong Wang/PW Phone Number: 310-253-5604
Fiscal Impact: Yes [X] No [] General Fund: Yes [] No [X]
Public Hearing: [] Action Item: [] Attachments: [X]
Commission Action Required: Yes [] No [X] Date: ________________
Public Notification: (E-Mail) Agenda and Meetings – City Council (04/27/11)
Department Approval:
Charles D. Herbertson (04/20/11)
City Attorney Approval:
Carol Schwab (by H. Baker) (04/27/11)
Chief Financial Officer Review:
Jeff Muir (by K. Marsden) (04/27/11)
City Manager Approval:
John M. Nachbar (04/27/11) City of Culver City, California
Agenda Item Report
Page 2 of 2
this project have structural integrity, though, there are signs of root damage and joint
problems. Instead of excavation and replacement of the existing sewer main, the
cured-in-place lining process provides for the insertion of a special lining material
inside the existing pipe at a much lower cost and much less disruption to the public
than sewer line replacement. The new liner creates a watertight, smooth surface
that is structurally sound and long lasting within the existing sewer main pipe.
In addition, based on review of the sewer videos, approximately 30% of the sewer
laterals have various degrees of root intrusion with some of the roots extending into
to City’s sewer main lines. As part of this project, the private sewer laterals with root
intrusion at the sewer main connection will receive a 6 to 8 inches deep “top hat”
trenchless liner. The liner will then prevent roots from entering the connection point
between the laterals and the City’s sewer line and thereby reduce the incidence of
root intrusion from laterals into the City’s sewer main. However, the homeowner is
still responsible for roots and breaks within their private sewer lateral as per the City
Code.
Final construction plans and specifications are available at the City Clerk’s office for
public review.
FISCAL ANALYSIS:
This project has sufficient funds in the Sewer Enterprise Fund capital project budget
20400906.
ATTACHMENTS:
1. Location maps
MOTIONS:
That the City Council:
Approve the final plans and specifications and authorize publication of a notice
inviting bids for construction of the Sewer Main Lining Rehabilitation Project (Phase
II), P-906.
MEETING DATE:
AGENDA ITEM:
Location Maps I -4
05/02/11
Approval of Final Plans and Specifications and
Authorization to Advertise Bids for Sewer Main
Lining Rehabilitation Project (Phase II), P-906.
ATTACHMENTS
Pages SEWER REHABILITATION PROJECT
PHASE II P-906
ATTACHMENT NO. 1
Page 1 of 4 SEWER REHABILITATION PROJECT
PHASE II P-906
ATTACHMENT NO. 1
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SEWER REHABILITATION PROJECT
PHASE II P-906
ATTACHMENT NO. 1
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SEWER REHABILITATION PROJECT
PHASE II P-906
ATTACHMENT NO. 1
Page 4 of 4