The Lethbridge Viaduct, commonly known as the High Level Bridge, is the longest and highest steel trestle bridge in North America. It was constructed between 1907–1909 at Lethbridge, Alberta, Canada at a cost of $1,334,525.
- Length: 1,623.86 m (5,327.625 ft)
- Height: 95.7 m (314.0 ft) above river bed
- Materials: 12,400 tons of steel
- Deck spans and lengths:
- 44 plate girder spans each of 20.4 m (66.93 ft)
- 22 plate girder spans each of 30.15 m (98.92 ft)
- one riveted lattice-truss of 32.6 m (106.96 ft)
- Rigid braced steel towers: total of 33
This massive steel trestle over the Oldman River was designed by the Canadian Pacific Railway's bridge department in Montreal. The field work was directed by CPR's Assistant Chief Engineer John Edward Schwitzer. The steel work was manufactured by the Canadian Bridge Company of Walkerville, Ontario. A 100 man gang worked on the erection of the steel. Although there were some initial problems with settlement, the bridge has proved to be an enduring engineering work and is still in use today.
It was built as part of a major diversion of the Crowsnest Pass route between Lethbridge and Fort Macleod. The river crossing was previously over a wooden trestle measuring 894 m (2,933 ft) long and 20 m (66 ft) high; an impressive structure in its own right.
Above is a picture of the High Level bridge I took the last time I was in Lethbridge! Sorry not the best picture but atleast I have one of my own.