American Society of Civil Engineers

Challenges in Rehabilitating a 100 Year Old Non-Circular Brick Sewer for City of Los Angeles

by Vamsi K. Seeta, P.E., (PARSONS, 100 W Walnut Street, Pasadena, CA 91124 E-mail:, Brad Jenson, P.E., (City of Los Angeles, Bureau of Engineering, 1149, S Broadway, Los Angeles, CA 900015 E-mail:, Eliza J. Whitman, P.E., (PARSONS, 100 W Walnut Street, Pasadena, CA 91124), Surendra Thakral, P.E., (PARSONS, 100 W Walnut Street, Pasadena, CA 91124), and David Yankovich, P.E., (PARSONS, 100 W Walnut Street, Pasadena, CA 91124)
Section: Planning, pp. 1427-1435, (doi:

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Document type: Conference Proceeding Paper
Part of: Pipelines 2009: Infrastructure’s Hidden Assets
Abstract: The City of Los Angeles (The City), as part of its $4.5 billion, 10-year Wastewater Capital Improvement Program, is executing rehabilitation of one of its largest and oldest sewers, namely Central Outfall Sewer (COS). The City’s Bureau of Engineering (BOE) in the Department of Public Works (DPW) is the group within the City responsible for planning, designing and construction of its wastewater collection system projects. The COS is a non-circular (60 inch x 73 inch oval) brick sewer that was constructed in 1908. After more than century of service, recent condition assessments indicated that COS has experienced severe corrosion and in some locations, moderate to severe brick loss.

ASCE Subject Headings:
Aging (material)