Gezhouba Dam
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The Gezhouba Dam or Gezhouba Water Control Project (simplified Chinese: 长江葛洲坝水利枢纽工程 pinyin: chángjiāng gězhōubà shuǐlì shūniǔ gōngchéng) is located in the suburbs of Yichang City in central China's Hubei province.
Here, after rushing out of Nanjing Pass, the Yangtze River slows down and widens from 300 m to about 2,200 m at the dam site. Two small islands, Gezhouba and Xiba, divided the river into three channels. There the Gezhouba Project was built.
Construction started on December 30, 1970 and ended on December 10,1988. It boasts a generating capacity of 2.71 GW along with three ship locks, two power stations that generate 14,100 GWh of electricity annually, the 27 gates of the spillway, and the no flowing Dam on both banks. The dam is 2,595 m long with a maximum height of 47 m. The reservoir has a total volume of 1.58 km³.
The navigation lock No. 2 on the third channel was, when built, among the 100 largest in the world. The lock chamber is 280 m long and 34 m wide, with a minimum draft of 5 m at the sill. It provides passage for ships of 10.000 tons.
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