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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Mackinac Trail – Carp River Bridge ： ウィキペディア英語版 Mackinac Trail – Carp River Bridge The Mackinac Trail – Carp River Bridge is a bridge located on Mackinac Trail over the Carp River in St. Ignace Township, Michigan. It is the oldest bridge in Mackinac County,〔(【引用サイトリンク】 publisher = HistoricBridges.org )〕 and was listed on the National Register of Historic Places in 1999.〔 ==History== In 1913, road improvement began on the Mackinac Trail a trunk line route connecting St. Ignace, Michigan and Sault Ste. Marie, Michigan.〔(【引用サイトリンク】title= Mackinac Trail/Carp River Bridge )〕 The improvement project included both grading the road surface and upgrading the bridges along the route. For one of these bridges, which carried the Mackinac Trail over the Carp River, the Michigan State Highway Department designed a concrete arch bridge in 1919. The Department awarded the contract to construct the bridge to A. S. Decker of Flint, Michigan, who completed work on the bridge in 1920.〔 This section of the Mackinac Trail was later incorporated into US-2, increasing the traffic flow across the bridge. In response, in 1929-30, new guardrails were added to the bridge, the deck was widened by , and new approaches of decorative cobblestone were constructed.〔 The section of US-2 was later replaced by I-75, and the Mackinac Trail was redesignated as a county road.〔 In 2009, the bridge was considered for demolition. However, it was decided in 2010 to refurbish the bridge instead. Weakened concrete was replaced, drains installed, and the roadway was widened by another . The Mackinac Trail – Carp River Bridge still carries local traffic.〔 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「Mackinac Trail – Carp River Bridge」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.