Mullan Tunnel Enlargement Project

Mullan Tunnel is the longest railroad tunnel in the state of Montana standing at 3,896 feet long. To accommodate larger freight loads LRL Construction increased the whole tunnel by 5 feet in length and 3 feet in width. In total, more than 100,000 cubic yards of dirt and rock were excavated and removed from the tunnel. LRL Construction Co., Inc. was the first contractor to work on the Mullan tunnel with a perfect safety record, no accidents or incidents occurred during the work performed during normal contract hours and the 28 day collapse while working 24 hour shifts, 7 days a week.