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Longtan Dam
Longtan Dam () is a large roller-compacted concrete (RCC) gravity dam on the Hongshui River in Tian'e County of the Guangxi Zhuang Autonomous Region, China, a tributary of the Xi River and the Pearl River. The dam is high and long; it is the tallest of its type in the world.〔 The dam is intended for hydroelectric power production, flood control and navigation. The dam contains seven surface spillways, two bottom outlets and an underground power station.
==Construction==
The dam was planned in the 1950s but preliminary construction (roads, bridges, river diversion) did not begin until 1990. Formal construction began on the project July 1, 2001 and the river was diverted by November 2003. A total of of material were excavated from the dam site.〔(【引用サイトリンク】url=http://www.chincold.org.cn/dams/rootfiles/2010/07/20/1279253974085140-1279253974089979.pdf )〕 Impounding of the reservoir began in 2006 and the dam's first of three operational hydroelectric generating units was testing May 2007. In 2009, the last generator became operational and the installed capacity increased to , its annual generation is estimated at .〔(Hydroelectric Power Plants in Guangxi & Guizhou, China )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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