Constructing pipelines and shafts to control combined sewer overflows is no simple matter, especially when doing so through a former landfill. Working their way through fragments of glass, brick, wood, wire and sheet metal, in addition to unexpected boulders and even an automobile chassis, project team members for the Balch Consolidation Conduit Shafts and Pipelines produced a project that exceeded expectations.

Completed ahead of schedule, under budget and within specifications, the 30-month project required installation of 8,000 feet of 84-inch and 54-inch diameter pipes via microtunneling at depths of 20 to 75 feet to carry sewage and stormwater runoff from the Balch Drainage Basin to the West Side Big Pipe.