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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 Double-arch Sandstone Bridge ： ウィキペディア英語版 Double-arch Sandstone Bridge The Double-arch Sandstone Bridge or more commonly known as the Sands Bridge, is a historic dry stone arch bridge over the Spicket River on Hampshire Road in Methuen, Massachusetts. Built without mortar between the stones, parts of it date back to 1735. It was used to handle traffic between Methuen and Salem, New Hampshire. ==History== The location, along the old Dracut Path, was a marshy area of the Spicket River that could be forded by horse or cart. The ford eventually was bridged. The earliest town record, from the Town meeting of 1730, show a simple plank bridge was used which required regular maintenance at the cost of the township. The wooden bridge was replaced with the more durable stone arch bridge in 1835. Solid abutment supports were constructed on each river bank. A wooden frame shaped like the underside of the bridge, was constructed over the river. The stones where then set on the frame, without mortar. The bridge was filled in with rubble and dirt, which over time would compress against the abutments. The wooden frame was then removed. If constructed correctly a stone-arch bridge should last indefinitely, the Sands Bridge is not a well built bridge. Photographic evidence shows the keystone had slipped by the late nineteenth century. The bridge was used consistently until it was taken out of service in 1963 when the Spicket River was rerouted and Interstate 93 was built. It was added to the National Register of Historic Places June 20, 1984.〔 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「Double-arch Sandstone 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.