Lethbridge Viaduct construction. Engineers and workers at the Lethbridge Viaduct during its construction. This railroad bridge was built from summer 1907 to August 1909 over the Oldman River at Lethbridge, Alberta, Canada. It was built by the Canadian Pacific Railway. The onsite engineer was John Edward Schwitzer. A crew of 100 erected 33 steel girder towers from mid-August 1908. This was aided by a travelling crane (upper centre) on the railroad that lowered the girders into position. The viaduct's height above the river is 96 metres, and the length is 1624 metres. Photograph from the Detroit Publishing Company.
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