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Sewer Pipeline Rehabilitation W-1

Project Overview

Sewer Pipeline Rehabilitation W-1 is located within Council District 1, specifically within the community of La Jolla. The project will rehabilitate approximately 4.12 miles (21,731 linear feet) of sewer main within the City’s right of way utilizing trenchless technology. It will also reconnect existing laterals to the newly rehabilitated mains; rehabilitate or replace manholes and laterals where required; conduct external spot repairs to existing sewer mains and laterals on an as-needed basis; and where required, install curb ramps that facilitate access for persons with disabilities.

Sewer Pipeline Rehabilitation Overview

On sewer pipeline rehabilitation projects, old and deteriorated sewer mains and laterals are lined with a hard plastic, reinforcing the old pipes, improve the system, and ultimately extending the service life of the old pipes. Pipeline rehabilitation is conducted without the need to dig up the old sewer main, referred to as using trenchless method of construction. In the rehabilitation process, the old pipes are accessed through existing manholes or cleanouts.

Because it does not require excavating, removing, and replacing an entire pipeline, relining the existing pipelines, is generally quicker and more cost-effective alternative to digging up an entire pipeline, and creates less impacts to the community and environment.

Here is a summary of the rehabilitation process:

  • First, a crew and a small truck with equipment set up along the centerline of the street and videotape the existing condition of the old pipe. If during the pre-construction videotape a damaged section of main or lateral is discovered that is too great to be lined, then the Contractor will perform a “Point Repair”. A point repair involves digging into the ground or street to fix a damaged section. This allows for the lining of the remaining main or lateral. Once the point repair is complete, the surface is restored to prior condition or better.
  • Then, the sewer pipe is cleaned to prepare the pipe for the lining process and the sewer pipes are reinforced with new plastic liners. Odor generation might result from a material called resin used to solidify the lining that is installed along the walls of the existing sewer main. The pungent smell will dissipate as construction progresses and poses no danger to residents and homes.
  • After the main sewer pipe is lined, the below ground laterals that connect to individual residences or business are located using the video taken prior to construction and using an above ground sensor.
  • Once the location has been determined, the contractor will install a clean out at the intersection of the lateral and the edge of the right-of-way, so that the lateral can be lined to the main. Depending on the location, construction workers hand dig or use small machinery to excavate a 4-foot by 4-foot area to facilitate the installation of the clean out.
  • Lastly, the newly relined sewer main and laterals are videotaped and inspected to ensure all contracted work is completed.

Anticipated Schedule

  • Construction Start: Summer 2013*
  • Construction Complete: Spring 2014*

* Dates are approximate and subject to change; please visit the Project website regularly for the latest!

Project Budget

The project's planning, design and construction budget is $5,034,830.

Contact Us

For questions or concerns about the project, call the Public Works Department construction project information line at (619) 533-4207, or email engineering@sandiego.gov. Please reference the Sewer Pipeline Rehabilitation W-1 in your inquiry.