Contractor uses pneumatic pipe plugs to meet extremely high head pressuresProblem:As part of a project that lasted a year and a half, The Metropolitan Water Reclamation District of Greater Chicago performed structure rehabilitation and pipelining along 175th Street and Ridgeland Avenue in the Chicago suburb of Tinley Park. The project’s objective was to update the infrastructure and prevent further deterioration of existing pipes and structures. Instead of digging up and replacing the old line, Insituform Technologies inserted a cured-in-place lining inside 14,051 feet of 60-inch sewer pipe. A Tinley Park-based subcontractor, Airy’s, supported the installation of the cured-in-place lining. Airy’s
