Pdxrailtransit that is a link to a 2011 story.
Here is something a little more current:
Canadian Pacifics main routes washed out...
Heavy rainfall over the Oldman and Bow river basins caused devastating floods throughout much of southwestern Alberta early Thursday morning, scouring away Canadian Pacific lines in Canmore and Crowsnest Pass.
The two lines are the railway’s only links to the west coast.
According to railway spokesperson Kevin Hrysak, high water conditions have affected Canadian Pacific lines in both locations, with high water scouring railbeds and bridge abutments.
Reports indicate that the railbed supporting Canadian Pacific’s Laggan Subdivision, part of the company’s transcontinental main line, is severely abraded or totally washed away at some points through Canmore by Cougar Creek