Pasadena Fill Line Rehabilitation
A critical 42-inch PCCP water line that runs under a residential area in Mesa, Arizona, had several sections of distressed pipe that needed to be rehabilitated. The City of Mesa engaged Burgess & Niple to evaluate pressure pipe rehabilitation methods, draft technical specifications, provide design and oversee construction services for this Construction Manager at Risk (CMAR) project.
The structural rehabilitation methods evaluated for this project included Close Fit Lining, Swagelining (Compressive Fit) and Sliplining. The available materials were Fusible HDPE PE4710, Fusible PVC C905, Centrifugally Cast Fiberglass Reinforced Polymer Mortar, and Coated Steel. The solution, a modified slip-lining method that used an HDPE pipe as the liner inside the existing pipe, was one of the first applications of its kind in the region.
This presentation will include an overview of pressure pipe rehabilitation methods and materials, how to select feasible rehabilitation methods for existing conditions, and the CMAR delivery method.