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The City of Los Angeles (City) operates and maintains more than 6500 miles of sewers serving more than 4 million people. The sewers range in size from 6″ to 150″, the oldest built in 1878. In time sewers corrode, develop structural defects, or become hydraulically inadequate.

Rehabilitation of sewers with plastic liners is a relatively new phenomenon. In order to optimize liner installation, the City and the consulting firm of LEE & RO, Inc. embarked on a benchmarking study to review its criteria and policies. The study was limited to CIPP only in order to control the size and scope of the report.

This paper presents the study, the recommendations, and the implemented decisions. The conclusions drawn will be shown over time with the CIPP structural liner thickness reduced. The cost reduction will be the savings from material cost, and the long term savings by the increase in competitive bids.

Document Type: Research Article


Publication date: 2008-01-01

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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