Spiral Tunnels

Canada / Alberta / Chateau Lake Louise /
 railway tunnel  Add category
Two spiral tunnels of the Canadian Pacific Railway
The display at the Lower Spiral Tunnel Viewpoint, 8 km. (5 mi.) east of the nearby town of Field, British Columbia on the Trans-Canada Highway, explains a railway and engineering marvel.
At this interpretive display, you'll learn how looped tracks were devised to solve the problem of the sharp gradient on the Canadian Pacific Railway's (CPR) line between Field and Lake Louise. The amazing result, completed in 1909, reduced the railway's grade from 4.5 percent, by far the steepest of any North American railway, to a more comfortable and efficient 2.2 percent.
kohlin.com/can-97/canada-4.htm
railways-atlas.tapor.ualberta.ca/cocoon/atlas/Maps-14-1...
Wikipedia article: http://en.wikipedia.org/wiki/Spiral_Tunnels
Nearby cities:
Coordinates:   51°25'42"N   116°24'41"W
This article was last modified 6 years ago