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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 Union Arch Bridge ： ウィキペディア英語版 Union Arch Bridge The Union Arch Bridge, also called the "Cabin John Bridge", is a historic masonry structure in Cabin John, Maryland. It was designed as part of the Washington Aqueduct. The bridge construction began in 1857 and was completed in 1864. The roadway surface was added later. The bridge was designed by Alfred Landon Rives, and built by the United States Army Corps of Engineers under the direction of Lieutenant Montgomery C. Meigs.〔Library of Congress. Prints and Photographs Division. Washington, D.C. ("Historic American Engineering Record (HAER) Collection: Record No. MD-53." ) Labeled as "Cabin John Aqueduct Bridge." Record originally prepared by National Park Service, 1987.〕 ==Bridge design== The bridge, with an overall length of and width of , is constructed of Massachusetts granite and red sandstone quarried at the nearby Seneca Quarry, and rises above Cabin John Creek. The main arch span is long and rises . The bridge has an internal spandrel wall structure that contains nine additional smaller arches, which are concealed from view by exterior stone sidewalls.〔Maryland State Highway Administration. Baltimore, MD (1995). ( "Historic Highway Bridges in Maryland: 1631-1960: Historic Context Report." ) Chapter 4, "Stone Arch Bridges: Other Significant Stone Arch Bridges." pp. 58-59. October 1995.〕 At the time of its construction in 1864, the main span was the longest single-span masonry arch in the world. It retained that distinction until the opening of the span of the Pont Adolphe Bridge in Luxembourg in 1903. Previously, that honour had gone to the Grosvenor Bridge which crosses the River Dee in Chester, England and which was opened by the thirteen-year-old Princess Victoria (five years before becoming Queen) in October 1832.〔 Visually, the similarities between the Union Arch Bridge and the Grosvenor Bridge are remarkable.〔 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「Union Arch 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.