August 2019 Vol. 74 No. 8
CURRENTLY @CUIRE (Center for Underground Infrastructure Research and Education)
NASTT Student Chapter Members Visit Dallas Tunneling Site
In May, 42 construction engineering and management students, and members of the North American Society for Trenchless Technology Student Chapter at the University of Texas at Arlington (UTA) visited the construction site for the Mill Creek Tunnel in Dallas. This 37-foot-diameter storm tunnel is being built by the city of Dallas and the contractor is Southland Contracting. The lead construction manager and consultant is Black & Veatch Corporation.
The specifics of tunnel include:
- Length: 5 miles
- Depth: 120 to 180 feet
- Tunnel Bore: 32.6 to 37.6 feet
- Tunnel Excavation: 1,100,000 CY
- Geology: Austin Chalk
- Final Lining: 30 to 35 feet inside diameter with 15-inch thickness cast-in-place concrete
- Shafts: 7 total, 12.5 to 40-foot finished diameter
- Dewatering Pump Station: 30,000 gpm capacity
- Construction Cost: Approximately $207,000,000
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