Highland Boy Drainage Gallery
Salt Lake City, Utah
Kennecott Utah Copper & Gold
Atkinson constructed an 8,000-linear-foot drainage gallery at the base of the Bingham Canyon Mine. During excavation, crews used drill and blast techniques to advance the tunnel simultaneously from two headings in a horseshoe orientation and met in the middle. Along the way, drill stations and sump pumps were installed to support the drainage program that runs throughout the tunnel. The tunnel is supported by shotcrete, welded wire mesh, and various bolting techniques.
Upon completion of the tunnel, Atkinson installed a drainage system comprised of stainless steel header units. The system collects water that drains from the drill galleries into an 18-inch HDPE pipe and discharges it into a sump at the portals.