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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 Boardman River ： ウィキペディア英語版 Boardman River The Boardman River is a 〔U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. (The National Map ), accessed November 21, 2011〕 river that flows into the west arm of Grand Traverse Bay in Traverse City, Michigan. The Boardman's upper tributaries rise near Kalkaska, Michigan, and its watershed drains an area of through of river and tributaries. The Boardman River is considered one of the top ten trout streams in Michigan.〔(Boardman River Natural River Plan ) Michigan Department of Natural Resources〕 Before entering the Grand Traverse Bay, it becomes Boardman Lake, a natural lake that was originally in size and increased to after the Union Street Dam was constructed in 1867. After flowing through Boardman Lake, the river descends through downtown Traverse City, following a hairpin-shaped course to Grand Traverse Bay. This Traverse City section of the Boardman River is accessible by motorboat from the lakeshore up to a weir upstream from the lakeshore. A short distance upstream from the weir is the Union Street Dam, a small decommissioned mill dam located between Cass and Union Streets. The other three dams on the river are being removed: Sabin, Boardman and Brown Bridge.〔(Dam Project ) Boardman River Dams Project〕 On October 6, 2012, a temporary structure put in place to facilitate drawdown at Brown Bridge Dam was breached, flooding the river valley.〔()〕 In June 2014 the Michigan DEQ issued a report identifying erosion around the temporary drawdown structure as the likely cause of the failure.〔() Michigan Department of Environmental Quality〕 Brown Bridge Dam removal was completed in January 2013 and resulted in the reestablishment of 2.5 miles of river channel.〔(Dam Project )〕 Revegetation and restoration work in the project area is ongoing.In preparation for the removal of the Boardman and Sabin Dams, both spillways have been opened and the impoundments have been drawn down as low as permitted by the permanent structures in place today. Deconstruction and removal are pending. ==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「Boardman River」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.