The construction of the main body of the Three Gorges Water Conservancy Complex includes the following work: rock-and-earth excavation of 102.83 million m 3 , concrete placement of 27.94 million m 3 , rock-and-earth refill of 31.98 million m 3 , metal frame installation of 256500 tons, installation of twenty-six 700 MW turbine-generator units (not including the six 700MW units in the Right Bank Underground Powerhouse under construction), and etc. Except the index of rock-and-earth refill, all the preceding indices are the biggest among water conservancy projects which are already built or under construction.