Fiberglass-reinforced concrete pipe rehabilitates interceptorProblemAn 84-inch brick-and-mortar interceptor, constructed in 1889, lay in the path of transportation improvements. Fearing vibrations from heavy machinery and loads from new downtown growth would collapse the pipe, the Metropolitan Council Environmental Services hired engineering firm Brown and Caldwell to assess it. They found crown cracks, sags and bulges, leaking joints, and dislodged bricks and stonework. There was no way to bypass the sewer given the time constraints.SolutionThe engineers recommended sliplining the 1,300-foot-long interceptor with centrifugally cast, fiber-reinforced, polymer-mortar pipe from HOBAS Pipe USA. Working at night in 50-foot-deep pits, Lametti and Sons from Hugo,
