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The Wills Creek Bollman Bridge originally served the Baltimore and Ohio Railroad's Pittsburgh Division main line. Designed by the self-taught engineer Wendel Bollman in 1871, this truss bridge is the last remaining span of the Pittsburgh Division line associated with Bollman. Around 1910 it was moved from Wills Creek to a location north of Meyersdale, Pennsylvania () after it was no longer able to safely carry heavier modern locomotives. It served as a vehicular bridge crossing CSX tracks on Summit Township Road 381. The bridge was again relocated in 2007 east of Meyersdale at Scratch Hill Road, Summit Township, on the Allegheny Highlands section of the Great Allegheny Passage.〔(【引用サイトリンク】url=http://www.meyersdalepa.org/railroad/bollman.html )〕 Though it was designed by Wendell Bollman, it does not employ his famous Bollman truss, but rather a Warren truss. It is long and wide. The east abutments are constructed of concrete, while the west are earthen with wood ties. This bridge has a wood deck, and ornate cast iron end pieces, lacework, and compression members. End posts and tension members are constructed of wrought iron. The bridge was listed on the National Register of Historic Places on November 8, 1978. ==See also== *List of bridges documented by the Historic American Engineering Record in Pennsylvania 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「Wills Creek Bollman Bridge」の詳細全文を読む スポンサード リンク
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