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Pennsylvania Railroad District : ウィキペディア英語版 | Pennsylvania Railroad District
Pennsylvania Railroad District, also known as Conrail: Little Juniata River Bridges and Tunnels or Bridges and Tunnels (Spruce Creek to Birmingham Section, Little Juniata River), is a national historic district located in Spruce Creek Township, Morris Township, and Warriors Mark Township in Huntingdon County, Pennsylvania and Tyrone Township in Blair County, Pennsylvania. It consists of 10 stone arch bridges, two parallel tunnels, and the right-of-way that links them. This 5.15 mile section had the most bridges and tunnels per mile to carry the Pennsylvania Railroad right-of-way. The bridges were built between 1886 and 1902, and are multiple semi-circular arch bridges built of stone ashlar. An original tunnel was built in 1850, and is a 1,151-foot long brick arched tunnel. The parallel tunnel was built in 1900, and is a 1,075-foot long brick-arched tunnel.〔(【引用サイトリンク】 National Historic Landmarks & National Register of Historic Places in Pennsylvania ) ''Note:'' This includes 〕 It was listed on the National Register of Historic Places in 1990.〔 == References ==
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「Pennsylvania Railroad District」の詳細全文を読む
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