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The Burlington Bridge is a vertical-lift railroad bridge across the across the Mississippi River between Burlington, Iowa, and Gulf Port, Illinois, United States. It is currently owned by BNSF Railway and carries two tracks which are part of BNSF's Chicago–Denver main line. It is the third bridge that has existed at the same location. The first, a single-track bridge that opened in 1868,〔Hudson, C. H. (7 March 1894). (The Original Construction of the Burlington Bridge in 1867-68 ). ''Journal of the Association of Engineering Societies'', Vol. 13, pp. 257–258.〕 and the second, a double-track bridge built in 1893, were swing bridges.〔Morison, George S. (6 December 1893). ( Reconstruction of the Burlington Bridge ). ''Journal of the Association of Engineering Societies'', Vol. 12, pp. 599–601.〕 The 1893 bridge was replaced in 2009–2011 by the current structure, which uses a vertical-lift span instead of a swing span.〔(Iowa DOT Tiger Grant Application )〕 The line and the earlier bridges were originally part of the network of the Chicago, Burlington and Quincy Railroad, commonly known as the Burlington Route, but became part of Burlington Northern Railroad in 1970 and later BNSF. Amtrak's ''California Zephyr'' crosses this bridge. On May 1, 2008, five fully loaded barges broke loose during a period of high water. One struck the bridge and became lodged under it. The bridge was closed until midday on May 2, when one track was opened after it was deemed safe. The barge was removed during the afternoon of May 3 and the other track was reopened that evening bringing the bridge back to full use to carry the dozens of trains that cross it daily. The BNSF Railway began work to replace the bridge in late 2009. The project was split into two phases, with the lift span being built first by Ames Construction, of Burnsville, MN and the approach trusses built by the Walsh Construction Company of Chicago, IL. The lift span was complete and operational by February 2011, while the remainder of the bridge wasn't officially dedicated until October 2012. File:CBandQ RR Bridge Burlington Iowa 1891.jpg|The Burlington (C. B. & Q. Railroad) bridge in 1891 File:Burlington Rail Bridge.jpg|The Burlington Rail Bridge in 1985, showing the long pier on which the swing span pivoted ==See also== *List of crossings of the Upper Mississippi River 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「Burlington Rail Bridge」の詳細全文を読む スポンサード リンク
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