AWWA ACE69071

After a number of successful projects using pipe bursting and close-fit lining technologies, the City of Calgary, Canada evaluated a number of options to renew a 300 mm cast iron water main on Spruce Drive. This assessment was carried out following the City's Triple Bottom Line Policy of reducing the Social, Economical, and Environmental impacts on City-managed projects. The City selected Insituform Technologies Limited's PolyFlex™ process to line the water main. Following a methodology used in 2006 to execute several water main lining projects, the City and Insituform planned the project and executed it cooperatively, with City forces providing expertise in excavation and reconnections to the existing system. This paper provides a review of the project background, and the liner options that the City and Insituform considered before choosing a tight fit DR 21 PE100 pipe. It discusses the proactive approach to developing a staging plan for installation which emphasized minimizing disruption to the residents and the area, as well as the selection of fittings for terminating the liner and installing fittings. The plan included coordination of access pit excavation by the City's construction crews. The paper also provides an overview of the liner installation using installation, using the PolyFlex™ process, and the City's installation of replacement fittings and system reconnections. It also discusses the economic and social benefits of the project. Includes tables, figures.