Civil tunnel construction is an important part of our work. We have built tunnels for sewers, highways, railroads, and hydroelectric projects. They have ranged from a few feet to forty feet in diameter and up to several miles in length.

We have constructed new railroad tunnels and have enlarged tunnels under traffic. For the hydroelectric industry, we have built both river diversion tunnels and power tunnels which deliver water to the generators. Though highway tunnels are a comparative rarity today, we have constructed many including several for our nation's interstate highway system.

We also specialize in Drift work of all dimensions. We drive drifts in mines throughout the country specializing in fault-crossings and drifts through water bearing zones. Call Cowin for all your underground drift work needs.

We have enlarged railroad tunnels under traffic without disrupting schedules and at minimum cost.

Interstate tunnel portal.