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Hebgen Dam
The Hebgen Dam is a concrete-core earthen embankment dam on the Madison River in the U.S. state of Montana. The dam is 85 feet tall and 721 feet long. The dam's purpose is to store and regulate water for other downstream reservoirs and hydroelectric power plants.〔(【引用サイトリンク】url=http://www.pplmontana.com/producing+power/power+plants/Hebgen+Lake+Reservoir.htm )〕 Montana Power Company originally built the dam, PPL Corporation purchased it in 1997 and sold it to NorthWestern Corporation in 2014. == History == The dam was built in 1914 and created Hebgen Lake. After the 1959 Hebgen Lake earthquake, the dam was damaged but it was fixed several weeks later.〔(【引用サイトリンク】url=http://www.visitmt.com/categories/moreinfo.asp?IDRRecordID=13850&siteid=1 )〕 On August 30, 2008, two of the dam's four hydraulic gates failed, releasing per second of water into the Madison River. The normal discharge of the dam is per second and the gate failure caused a 1-foot rise in the river.〔(【引用サイトリンク】url=http://www.damsafety.org/media/Documents/PRESS/US_FailuresIncidents.pdf )〕
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「Hebgen Dam」の詳細全文を読む
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