Aliso Beach Interceptor CIPP Lining Project


Aliso Beach Interceptor CIPP Lining Project

Authors:

Joseph McDivitt, South Coast Water District, Laguna Beach, CA United States
Chuck Parsons, Sancon Companies

Abstract: The Aliso Beach Sewer Interceptor Project required extensive engineering, planning and logistical considerations to prepare for the CIPP lining rehabilitation of approximately 1,850-feet of existing 18-inch and 21-inch Techite and VCP sewer gravity mains. The District hired a contractor to complete this section of pipe repair (CIPP lining) in preparation for other work over and around the pipeline as part of the Tunnel Rehabilitation and Pipeline Replacement project. The District installed the original pipeline in 1954 and replaced some sections in 1974. The rehabilitated pipeline runs under Aliso Beach and Camel Point Beach with less than five feet of cover in some areas. The 24-inch interceptor, which carries over a million gallons of wastewater a day, lies between 100 feet and 150 feet away from the Pacific Ocean mean high tide line leaving no room for failure or spillage.

The work required extensive planning with consideration of high tides, beach erosion and close coordination and permitting with regulatory agencies, local authorities and affected homeowners to prepare for bypass installation and CIPP lining on the beach area. The project started with planning and engineering, contractor procurement and progressed to mobilization, installation of bypass pumps and pumping, and trenchless lining rehabilitation. The contractor successfully completed the project in 6 weeks at a cost of $705,718 with no spills or impacts to the environment or surrounding homes.

Publication Date: 2019

Presented at:
NASTT’s 2019 No-Dig Show Chicago, Illinois
March 17-21, 2019 | Paper Number: TM1-T5-01


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