Sliplining 120-Inch RCP Wastewater in Dallas: Part 2

The Southside 120-In. Wastewater Interceptor Rehabilitation project includes sliplining 11,600 linear feet of 120-in. reinforced concrete pipe (RCP) with 110-in. fiber reinforced polymer mortar pipe. The project also includes internal point repairs on the parallel 72-in. reinforced concrete pipe and cured-in-place rehabilitation for over 800 linear feet of 42- to 54-in. reinforced concrete pipe. Construction for the Southside 120-In. Wastewater Interceptor Rehabilitation project began in November 2018 and will continue until December 2020. This presentation will focus on construction challenges like flow diversions, working in the 100 year floodplain, excavation and shoring up to 50 ft deep, sliplining through horizontal curves, cured-in-place rehabilitation underneath a creek, and grouting the annulus space after sliplining. The presentation will discuss how the owner, engineer, and contractor collaborated during construction to develop cost effective solutions. The presentation will also include numerous up to date construction photos to illustrate the lessons learned and sliplining process for large diameter wastewater rehabilitation.