1982年6月初全部建成的葛洲坝水利枢纽大江上游土石横向围堰,已于1983年1月下旬正式通过竣工验收。该围堰是保护葛洲坝二期工程施工安全的屏障,同时担负着拦蓄江水、壅高水位,保证一期工程通航、发电的重任;建成后即全年处于设计水头下运行,时间将长达五年之久,实际上是长江于流上的第一座大型土石坝(最大坝高50米)。这座围堰采用砂 In early June 1982 Gezhouba Hydro Project completed in the upper reaches of the earth and stone lateral cofferdam, in January 1983 formally passed the final acceptance. The cofferdam is a barrier to protect the construction safety of Phase II of Gezhouba Project and is also responsible for reserving river water and high water level to ensure the navigation and power generation of Phase I project. After the project is completed, it will run for a full year under design head Years, is actually the first large-scale earth dam on the flow of the Yangtze River (the maximum dam height of 50 meters). This cofferdam uses sand