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葛洲坝水利枢纽工程分两期施工。按投资划分原则,一期工程为二、三江通航发电的主体工程,二期工程为大江工程和二江电厂5台机组安装。一期工程于1970年12月开始施工准备,1974年大规模施工,1981年1月大江截流,同年6月三江通航建筑物投入运行,7月二江电厂开始发电。1982年大江工程施工全面展开。为了贯彻中央关于“降低造价,缩短建设周期”的指示精神,1983年4月,水电部决定在葛洲坝二期工程进行投资包干试点,即按总概算包干。同时颁发了《葛洲坝二
Gezhouba Dam project in two phases. According to the principle of investment division, the first phase of the project is the main project for power generation in the second and third rivers and the second phase is for the installation of 5 units of the Dajiang Project and the Erjiang Power Plant. The first phase of the project started construction in December 1970, large-scale construction in 1974, the interception of the major rivers in January 1981 and the opening of the Sanjiang navigable buildings in June of the same year. In July, the second-river power plant started generating electricity. In 1982 the construction of the Dajiang River project started in full swing. In order to implement the directives of the central government on “reducing construction costs and shortening the construction period”, in April 1983, the Ministry of Electricity and Water Conservation decided to conduct a pilot project of investment and package-work in the second phase of Gezhouba Project. At the same time awarded the "Gezhouba II