Tunneling & Boring


Underground Infrastructure Technologies

UIT is a trenchless utility installation firm having performed a variety of tunneling and boring projects, drainage improvements, slipline installations, subgrade stabilization and ground improvement projects. UIT combines years of practical underground and technical geotechnical experience to provide turnkey tunneling solutions that include not only trenchless installation, but a variety of geotechnical services to facilitate installations in challenging conditions. In the past 10+ years, we have successfully completed wet and dry utility installation projects ranging from $5,000 to $10,000,000 with diameters spanning from 20” to over 142” in diameter. UIT routinely performs methods such as Auger Boring, Microtunnel, Tunnel Boring Machine (TBM), Pipe Ramming, Conventional Hand Tunneling and Sliplining.

Cottonwood Siphon

250 LF of 142”-diameter steel sliplining in an existing underground concrete water tunnel…

Loveland, CO

Tunnel Rehab

Blue Marlin Boring

For this project, UIT used three guided auger bores; two with 20″-diameter casing and one with…

Aurora, CO

Auger Boring

40th and Blake

Located in a highly dense urban location with multiple utilities in the work zone as well as…

Loveland, CO



As Colorado’s premier underground utility contractor, UIT provides design-build underground solutions for Class 1 Rail Roads, departments of transportation, federal and state agencies, local municipalities as well as sewer and water districts.