Sanitary Sewer Rehabilitation Using Cured in Place Pipe (CIPP) in the City of Aurora: a Design Engineer&s Perspective

The Sanitary Sewer system in the City of Aurora was over 50 years old and in need of rehabilitation or replacement. The majority of the small diameter system is vitrified clay pipe (VCP) that has exceeded its original design life. A large portion of the interceptor system consists of reinforced concrete pipe (RCP) that had been exposed to high levels of hydrogen sulfide and had begun deteriorating. By utilizing a systematic approach to rehabilitation, priorities within the system were identified. Completing this project required planning, designing, bidding, and constructing the sanitary sewer rehabilitation. Important constraints include prequalification of bidders, preparation of bid documents (what to include and exclude), contract procurement for bid award with the option of multiple year contracts, and construction management. Other keys to the project include what the liner should look like, what is allowable and acceptable for intrusion and wrinkling, as well as final tap cutting. Tap repairs are often necessary after installation and methodologies for repair were reviewed. Finally, public involvement, information, and coordination were a critical part of this successful project. This paper is a continuation of the paper written by Barsoom and Degenhart (2010) with their permission