Construction
Construction of the Seal Island Bridge began in 1960 as part of the Trans-Canada Highway project. The bridge, officially known as the Great Bras d'Or Crossing, was completed in 1961 at a cost of about $4,652,850. The construction of 23 kilometres (14 mi) of approach roads increased the total cost of the project to about $6-million. The bridge is a crucial link in the Trans Canada Highway between Sydney and Baddeck, carrying more than 7,500 vehicles a day in peak periods. The structure carries 2 traffic lanes of Highway 105 and was originally constructed with a pedestrian sidewalk on each side.
The bridge crosses part of the channel on a causeway connecting the north shore of the channel to Seal Island, a small wooded island. The structure consists of eight steel box truss spans; three simply supported 76.2 m (250 ft) approach spans, two simply-supported 76.2 m (250 ft) splay spans, and a three-span continuous main span that consists of two 106.68 m (350 ft) side spans and a 152.4 m (500 ft) centre arch span. The steel structure is supported on tall reinforced concrete piers, armoured with cut stone at the waterline.
Read more about this topic: Seal Island Bridge
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