A Los Angeles Marathon — Building 60 Miles of Sewers a Year

The City of Los Angeles operates and maintains a wastewater collection system consisting of more than 6,700 miles of sewers ranging in size from 6-inches to 150-inches in diameter. It serves over 4 million residents and conveys approximately 450 mgd of wastewater into three treatment plants. In August 2004, the City of Los Angeles entered into a Collection System Settlement Agreement with the USEPA, the California RWQCB and the Santa Monica Baykeeper. A key requirement of the settlement agreement is the renewal of 60 miles of sewers per year. The 60-mile program is an ambitious program that required the development of computerized planning and design tools and a non-conventional project delivery system that will deliver the required mileage. This paper will describe the entire sewer planning, design, bid and award, and renewal process and highlights the innovative measures that have been developed and undertaken by the City. It will also demonstrate that sewer rehabilitation is an integrated effort among the various Bureaus and City offices involved in planning, design, bid and award, and construction.