Our professionals have provided owner advisory, construction management, and inspection services on tunneling projects throughout the United States.

Utilizing alternative delivery methods and state-of-art tunneling technologies, Tanner Pacific’s staff project experience includes transportation tunnels for metro systems and highways, water and wastewater conveyance systems, and tunnels for diversion and dam intakes.

We have the qualifications to effectively manage the technical, contractual, and construction challenges of complex multidisciplinary underground projects and are knowledgeable about how different tunneling methods impact site specific conditions such as soils, urban environments, and groundwater infiltration.

Our team’s expertise includes:

• Roadheaders

• Digger shields

• Tunnel Boring Machines (EPB, slurry, hard rock)

• Sequential excavation (SEM/NATM)

• Drill and blast tunneling