St. Helens Wastewater Utility worker Scott Williams points to a pipe defect on the Rausch monitor during a video inspection.
For a city that sits on a giant rock, solving serious stormwater and sanitary sewer overflow issues requires a full range of trenchless technologies.
Under a state mandate to reduce SSOs, St. Helens, Oregon, used sliplining, cured-in-place pipe, pipe bursting and pipe ramming in a comprehensive remediation program that has reduced wet-weather flows to its treatment plant by about 80 percent and cut SSOs to less than one per year. That’s down from 2.5 per year in the past. ...
