Underground

Specializing in mine development construction, production mining, shaft sinking, and tunnel excavation, our talented professionals are well versed in all types of excavations, including the New Austrian Tunneling Method, Tunnel Boring Machine, and conventional drill and blast techniques.

250+

Projects

$4B

Underground Project Portfolio

Related Markets

Tunnels & Mines

Water & Wastewater

Mass Transit

Heavy/Light Rail

Underground Projects Map

Leeville Shafts

Carlin, Nevada

Underground Projects Map

Leeville Shafts

Leeville Hoisting & Underground Conveying System

Leeville 3rd Ore Bin

Courthouse Commons Pedestrian Tunnel

Central Water Integration Pipeline Segment 5-1

E330 Downtown Tunnel

Plane Train Tunnel West Extension

St. Lawerence Zinc Mine

Uh1 Shaft

Whiskey Island Surge Bin Removal

Atlanta Water Supply Program

Randolph Mine Decline Rehabilitation

Holtwood Dam

Rosslyn Station Access Improvements

Pumpkin Hollow

McCormick Place Stormwater Tunnel

Easterly Tunnel Dewatering Pump Station

Thornton Connecting Tunnel & Gates

Claremont Tunnel Seismic Upgrade

Port of Will County Decline

Pinson Mine

North Ore Shoot Shaft Recovery

Lime Creek Access Slopes

Leeville Hoisting & Underground Conveying System

Leeville Shafts

Leeville 3rd Ore Bin

Highland Boy Drainage Gallery

Golden Sunlight Mine

Avery Island Salt Mine

Mission Valley East Extension

Dulles International Airport East/West Automated People Mover

A-Line North Aerial Structures

Blue Ridge Low Level Outlet

Mud Mountain Inlet

Leadership

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