According to the Communists, the Sanhsia Dam would involve a cost of US $ 18 billion, would generate 67.7 billion kwh of power a year, would supply electricity for the mainland's "Four Modernizations," and would solve the flooding problems on the lower Yangtze, which are due largely to upstream deforestation.
依照中共「官方」發佈的消息：三峽大壩投資總額將達一百八十億美元，完成後全年總發電量可達六百七十七億度，比目前世界最大的巴西埃泰布水壩多，能舒解大陸發展四個現代化所需的電力；也可望減輕長江因上游大量伐木、中下游圍湖造田產生的連年水患。