Brent Duncan, PE
Brent possesses nearly 30 years of proficient project oversight and management within diverse design and construction teams. His extensive underground experience involves the excavation of large diameter tunnels requiring advanced drill/blast coordination. Mr. Duncan has saved millions of dollars on his high-profile projects through value engineering, along with delivering substantial negotiation and communication among subcontractors and suppliers. Based out of our Corona office, Mr. Duncan provides oversight on several of our current major tunneling projects and contributes to Drill Tech’s overall tunneling operations.
- 15 Tunneling Projects Successfully Completed throughout career
- $650M Contract Value of Tunneling Projects throughout career
- 163,000 LF of Tunneling Projects throughout career
- 5,100 VF of Shaft Excavation throughout career
Brent's Featured Projects
FCWA Occoquan River Crossing Tunnel | Lorton, VA
Project Manager
Drill Tech performed drill/blast excavation and temporary support of a new vertical shaft at 24' diameter x 98' deep and a new tunnel at 12' wide x 10' tall x 420' long. The temporary shaft and tunnel support consisted of resin rock bolts, welded wire fabric, and steel straps. Two additional 7' diameter shafts were excavated to a depth of 90' below grade using raise bore methods. Lastly, twin runs of 42" diameter steel water main pipes were installed in the tunnel.
Northside Interceptor Tunnel | Akron, OH
Project Manager
Drill Tech performed roadheader tunnel excavation and temporary support of three new tunnels totaling 860 LF. Excavated dimensions of the tunnels were 23.5' high by 22.5' wide (horseshoe). The temporary shaft and tunnel support consisted of rock dowels, welded wire fabric, shotcrete, and steel straps.
Milestone Reservoir and Pump Station | Ashburn, VA
Project Executive
This project consists of the drill/blast excavation of a new 30' diameter and 275' deep vertical shaft and three new tunnels totaling 2,400 LF in length. Drill Tech utilized various initial and final support systems for both the shaft and tunnels, including shotcrete, resin rock bolts, and reinforced concrete. This project also includes construction of a new vertical shaft using raise bore methods and installing a 42" and 36" diameter steel water pipe in the shaft and tunnels.
