AWWA ACE69070

This powerpoint presentation begins by providing a brief overview of the need for cost efficient, effective infrastructure rehabilitation technologies, and the major causes of problems in distribution pipes. Epoxy lining is presented as a non-structural renewal method. Epoxy characteristics are listed, along with the Epoxy Lining process that includes the following: Location / Access; Bypass; Isolation; Cleaning; Inspection (Pre-lining); Lining; Inspection (Post-lining); Disinfection; and, Reconnection. An example is provided of using epoxy lining at the city of McKinney, Texas. The selection process is presented, along with project execution and highlights. Project summary includes the following: 3-year multi-phased project; October 2009 completion target; City Council approved $1m per year for 3 years; average cost of $45 per foot budgeted for trenchless contractors; as of January 2008, 24,800 feet of estimated 68,000 feet has been completed; total costs associated with project average $60 per foot vs. $100 per foot for replacement; and, in the last four months of the project only 4 complaints were received for discolored or rusty water. The known benefits of epoxy lining are listed and include: protection against future corrosion; prevents colored water and stains; service life established 40-60+ years; reduced friction, increases flow capacity; more effective than flushing by producing long-term solution to internal pipe corrosion; minimally disruptive to other utilities, infrastructure and environment; and, faster and less costly than replacement.