Los Angeles, California

North Outfall Sewer, East Central Interceptor Sewer (NOS-ECIS) - City of Los Angeles

Project Summary

The City of Los Angeles upgraded a major portion of its sewer system in response to severe sewage spills during the El Niño of 1998.  The $240 million project involved the installation of new underground sewer lines, air siphon lines, junction boxes, etc.  A combination of open cuts and tunnel-boring machines (TBMs) were used to access the areas where the permanent structures were installed.


Structural Engineering, Construction Engineering