"West Goshen Township in Pennsylvania is a beautiful suburban town outside of Philadelphia. The township has a neighborhood in town called Knollwood Drive, which is around 25 homes at the end of a cul-de-sac. Part of the local drainage system included a large-diameter corrugated steel pipe arch culvert.
What Was the Problem?
The culvert in question ran underneath Knollwood Drive. Traditional open-cut replacement methods would have meant preventing resident and emergency vehicle access to the neighborhood, but also disturbing other utilities: gas, water and sewer. The corrugated metal pipe arch was in a severely deteriorated condition. The invert was corroded and contained large section loss. The geometry of the culvert throughout the length of the culvert was also very misshapen, in fact the pipe haunches has heaved leaving a very uneven invert profile.
The engineer and the contractor had to invest some decent energies into surveying the host pipe geometry in the various corner radii. Channeline’s short lay length segments and customizable manufacturing process helped with the insertion of the culvert liner as it made its way through the host pipe."
"Culvert Rehab Success in Pennsylvania" from Trenchless Technology | August 3, 2021: https://trenchlesstechnology.com/culvert-rehab-success-in-pennsylvania/