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The Seal Island Bridge is a Canadian bridge located in Victoria County, Nova Scotia. It is the third longest bridge span in the province. It is a through arch design and crosses the Great Bras d'Or channel of Bras d'Or Lake, connecting Boularderie Centre, Boularderie Island on the south side with New Harris, Cape Breton Island on the north side. ==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 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.〔 (【引用サイトリンク】 Bridge Birthday Celebrated ) 〕〔 (【引用サイトリンク】 Bridge Fix A Winner ) 〕 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 approach spans, two simply-supported splay spans, and a three-span continuous main span that consists of two side spans and a centre arch span.〔 (【引用サイトリンク】 Project of the Month: September 2002 - Seal Island Precast Concrete Bridge Deck Replacement, Cape Breton, NS ) 〕 The steel structure is supported on tall reinforced concrete piers, armoured with cut stone at the waterline. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Seal Island Bridge」の詳細全文を読む スポンサード リンク
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