Founded in 1990, National Underground Group’s Tri-State Utilities division provides pipeline rehabilitation of sewers and storm drains using trenchless pipelining technologies, including the cured-in-place-pipe (CIPP) process and other industry-leading technologies.

Tri-State clients include municipalities, federal agencies and their partner engineers, and general contractors. Additional Tri-State services include pipe cleaning, CCTV inspection, smoke and dye testing, grouting and HDPE sliplining. Tri-State Utilities is located in Chesapeake, VA with a branch office outside of Charlotte in Denver, NC.