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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 Putnam Street Bridge ： ウィキペディア英語版 Putnam Street Bridge The Putnam Street Bridge, also known as the Marietta Bridge, is a historical United States river crossing that connects Marietta, Ohio with its Fort Harmar district. The original 1880 bridge was the first free crossing of the Muskingum River. The 1913 bridge was a contributing structure to the Harmar Historic District. The bridge crosses the Muskingum, just above its confluence with the Ohio River. == History == The original bridge was constructed in 1880. It had two swing spans as the lock of a nearby dam was in the process of being moved from the west to east side. That bridge was wrecked by the 1884 flood. A second bridge was built on the same piers, also with two swing spans. An increase in traffic necessitated a new bridge in 1900, which was built on 4 new stone piers with a single swing section. That bridge was swept away in the Ohio flood of 1913.〔Historical Plaque at site.〕 In 1913-4 a new bridge was built on the same piers and abutments, but was raised up to reduce the risk of further flood damage.〔 The bridge was built by the Nelson-Merydith Company of Marietta. In 1951, the timber deck was replaced by concrete. In 1972 the timber sidewalks were replaced and repairs were made to the structure. In 1993 structural reinforcements were added. On 27 April 2000, this span was demolished using 400 linear shaped charges.〔(【引用サイトリンク】title= Demolition of Putnam Street Bridge )〕 In 1999 a new bridge was constructed just down stream of the 1880 crossing. The new bridge is the first in Ohio to use the cast-in-place reinforced concrete box with the balanced cantilever method of construction.〔 The new bridge, while of a new design, incorporates architectural details of the older bridge. The new bridge cost US$11.4 million.〔 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「Putnam Street 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.