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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 Board Tree Tunnel ： ウィキペディア英語版 Board Tree Tunnel The Board Tree Tunnel, near Littleton, West Virginia, was built between 1851 and 1858 by the Baltimore and Ohio Railroad on its main line between Baltimore, Maryland, and Wheeling, West Virginia, under the supervision of B&O chief engineer Benjamin Henry Latrobe, II. The tunnel used a segmental cast iron lining system pioneered on the conteporaneous Kingwood Tunnel on the same line. Workers were recruited from coal mines in the area to excavate the tunnel. The tunneling operations used black powder as explosive. About 30 deaths and 300 injuries occurred in the excavation of the Board Tree and Kingwood tunnels. The tunnel is now abandoned.〔 ==See also== *List of tunnels documented by the Historic American Engineering Record in West Virginia 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「Board Tree Tunnel」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.