TUNNELS

This unique project addresses Denver International Airport’s (DEN) most significant environmental risk, the discharge of aircraft deicing fluid to receiving waters. Southland Contracting (SCI) is constructing critically needed DIW infrastructure…

A historic milestone for Southland Holdings, this project was the first segment tunnel constructed in North America in 1976. Project Details Owner: City of Thunder Bay, Ontario SOUTHLAND HOLDINGS TEAM:…

This $103M tunnel project consisted of a 12 ft. diameter tunnel over 350 ft. below existing ground from the Austin’s Water Treatment Plant No. 4 to the Jollyville Reservoir. The…

The Mill Creek Drainage Relief Tunnel Project will provide drainage relief to the Mill Creek and Peaks Branch watersheds and the State Thomas area (also referred to as the Woodall…

During periods of heavy rain, the City and County of Honolulu can experience overflows and spills at its Kaneohe Waste Water Pre-Treatment Facility. The solution is to connect the Kaneohe…

This $300 million project for the City of Toronto will replace the current outfall tunnel, which is at the end of its service life. The ABTP is the largest of…