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    • Earth Retention
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    • Ground Treatment
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  • About US
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Underground Projects

Drill Tech possesses a thorough proficiency for mining, tunneling, shaft construction, and their respective support systems for underground excavation. With an extensive background in SEM/NATM, roadheader, drill/blast, box jacking, microtunneling, and other tunneling techniques, we confidently offer our services in even the most challenging of locations. Several of our projects are in fact located in remote areas and are under various regulatory oversight.

Expert Tunneling Solutions for Complex Projects

Our diverse experience displays expert adherence to project safety standards, environmental considerations, and site-specific requirements. Whether through dense urban landscapes, alongside operational highways, unstable geological conditions, or underwater crossings, our success in design and construction stands the test of time.

Cal Park Tunnel Rehabilitations and Appurtenances

Caldecott Tunnel 4th Bore (Hwy 24)

Caltrain Tunnel Modifications for Electrification Project

Carlton Tunnel Rehab

FCWA Occoquan River Crossing Tunnel

Helms Tunnel Liner Repair

Cal Park Tunnel

Kingsport Water Intake Tunnel

Lenihan Dam Outlet Modifications and Inlet Shaft

Mayo Clinic Tunnel

Milestone Reservoir & Pump Station

NAVFAC Navy RR Culverts

NAVFAC Navy RR Culverts

NGM Meikle-REN UDS

Northside Interceptor Tunnel

OID Paulsell Lateral Tunnels 1&2

Potomac Intake Tunnel and Shaft

Range Front Declines

Re-Wetting of Muggins Gulch

Salt Lake City Temple Tunnel

San Ramon Canyon Storm Drain Repair

SCVWD Anderson Dam Tunnel

SCVWD Upper Llagas Creek Phase 2A

SMUD Jaybird Tunnel Rehab and Slope Rockfall Mitigation

SMUD White Rock Tunnel

SR 89 Mousehole Multi-Use Path and UPRR Undercrossing

SRCSD Harvest Water Franklin-Eschinger Pipeline

Stillwater East Boulder Mine

Tunnel Stabilization and Sewer Pipeline Phases 1-4

Two-Mile Bar Tunnel

U.S. 101 Red Barn Box Jacking

Vulcan Durbin Plant Conveyor Tunnel

West Warm Springs Shaft

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