Case Study
Critical Infrastructure Renewal: 300-Foot Trenchless Structural Lining Under Railroad Crossing
The existing clay pipline exhibited structural failure due to age-related deterioration, resulting in cracking that allowed root intrusion into the system infrastructure beneath an active railroad corridor that were contributing to recurring sanitary sewer backups impacting multiple residential properties.
The existing line was first thoroughly cleaned using premium chains, heavy grit sandpaper, and a high-pressured hydro jetter to remove debris, roots, and accumulated deposits utilizing manholes on both sides of the railroad as access points. A custom NuFlow-fabricated, resin-saturated 8” reinforced, load-bearing liner was inserted into the host pipe and postioned to span the entire affected segment beneath the railroad. The liner was then cured using ambient temperature forming a seamless, jointless pipe within the existing infrastructure.
A trenchless pipe lining solution was implemented to rehabilitate the deteriorated pipeline beneath the active railroad corridor without excavation or service disruption.
This process effectively restored the structural intergrity of the pipeline, sealed all leaks, and eliminated infiltration and exfiltration pathways. The rehabilitated pipeline now provides a corrosion-resistant, structurally sound solution with improved performance, eliminating backups and extending the servie life of the system by several decades—all while avoiding the risks and cost associated with excavation beneath the railroad.
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