三峡工程于1994年12月14日正式开工,到2009年全部竣工,工期17年,至今时间过半。三峡枢纽工程分三期施工。一期工程的标志为大江截流。二期工程主要修建三峡大坝的泄洪坝段、左岸厂房坝段、永久船闸。三期工程要对二期已筑起的大坝和右岸之间的导流明渠截流,建右岸厂房坝段。11月22日,首批机组的安装正式启动。首批机组装4台70万kW水轮发电机。目前已建成的三峡大坝高度已超过140m,具备挡水条件,因此,80多m高的上游围堰其使命已完成。上游围堰于11月18日开始拆除。三峡枢纽工程 Three Gorges Project was officially started on December 14, 1994, and was completed in 2009, with a construction period of 17 years and over half of the time so far. Three Gorges Project construction in three phases. The first phase of the project for the river closure. The second phase of the project mainly to build the Three Gorges Dam flood discharge dam section, the left bank of the plant dam, permanent lock. The third phase of the project has to be built on the second phase of the dam and the right bank between the closure of the diversion channel, built right bank dam section. November 22, the first batch of unit installation was officially launched. The first batch of 4 sets of 700,000 kW turbine generator. The dam height of the Three Gorges Dam, which has been built up to now, has exceeded 140m and is equipped with retaining conditions. Therefore, the mission of the upstream cofferdam with a height of over 80 m has been completed. The upstream cofferdam began to be demolished on November 18. Three Gorges Project