Learn More About National Underground Group

Digging a Little Deeper into Our Company

National Underground Group helps keep our nation’s communities safe and healthy by providing industry-leading services and technologies for the assessment, maintenance and protection of underground infrastructure.

National Underground Group’s member companies — Pro-Pipe, Tri-State Utilities, Accumark, Pipevision and Benchmark — have been providing solutions to engineering firms, government entities, utility owners and contractors across the nation for over 30 years.

We continually strive to bring value to our clients through high-quality data deliverables and services in pipe cleaning and assessment, cross bore inspection, trenchless rehabilitation, and subsurface utility locating and mapping.