Gezhouba Water Control Project on Yangtze River葛洲坝水利枢纽工程The experimental dam of the TGP(Three Gorges Project) Gezhouba Water Control Project is located at the lower end of the Three Gorges in the suburb of Yichang City, 2.3 km near Nanjin pass of Xiling Gorge, 38 km downstream of the TGP.葛洲坝水利枢纽工程是长江第一座水利枢纽工程，是三峡工程的实验坝，坐落于长江三峡出口，湖北省宜昌市区，距离西陵峡口南津关2.3千米，距上游的三峡大坝38千米。The Dam is 2595 meters long, with a total storage capacity of l.58 billion m3 and a maximum flood discharging capability of 110,000 m3/s. The two hydro-electric plants have 21 generating units with a total installed capacity of 2.715 million kw. and annual output of 15.7 billion kwh. The annual one-way shipping capacity of the navigation facilities is 50 million tons.大坝全长2595米，总库容量15.8亿立方米，仅次于排洪量，为每秒11万立方米。

水电站共计两座，一在大江，装机14台；一在二江，装机7台，总容量271.5万千瓦。使用较低水头径流发电，年均发电平均157亿度。三座船闸年单向通过能力为5000万吨。The construction of the Gezhouba Project, including two stages, started in 1970. On January 3, 1981, the Yangtze River was completely blocked and the construction of the second stage of the project begun. The whole project ended in 1991.葛洲坝水利枢纽工程于1970年动工，分两期展开建设。

1981年1月3日大江分洪，6月二、三江蓄水通航发电，一期工程基本已完成。第二期大江工程于1982年开始施工，1986年大江电站第一台机组开始发电，1988年14台机组全部竣工并网发电。1991年整个枢纽工程全部完工。

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