This single-track 1.83-kilometre (1.14 mi) tunnel,[1] which carries the Canadian Pacific Kansas City main line beneath the foothills of Mount Shaughnessy in the Selkirk Mountains, handles mostly westbound traffic.
Using this access, the Manning-Kumagai (MK) joint venture (comprising Manning Construction & Kumagai Gumi) began to tunnel northward in June 1985.
[3] The 84 cubic metres (110 cu yd) of rubble produced daily was dumped into the large depression to help create the grade stretching to the Mount Macdonald Tunnel.
[1] From early August to the end of September 2002, the Rogers (Fraine) pusher base was temporarily reactivated for the first time since the Macdonald Track opened.
This allowed a tunnel closure, when Emil Anderson Construction replaced the concrete lining along the sections adjacent to each portal.