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Sewer Liner Defect/ Deficiency Assessment Guidelines

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The City of Los Angeles is currently under a court-mandated order to repair 60 miles of sanitary sewer per year for the next seven years. An acceptable repair method includes sewer lining of the pipelines as a means to improve the hydraulic capacity of the sewer lines and extend the sewer system life expectancy by 100 years. Typical sewer lining systems include:

CIPP (cured in-place resin liners)

Fold-and-Form Liners (HDPE, PVC)

Rigid Spiral-Wound Liners

Given the magnitude and ambitious nature of the sewer lining program, the City recognized a need to establish a uniform procedure for assessing the sewer liner installation with respect to its acceptability. If a deficiency is noted, then appropriate repair methods coupled with monetary penalties would apply.

Document Type: Research Article


Publication date: 2008-01-01

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