The Three Gorges Dam, which spans the Yangtze River in China’s Hubei province, will be the biggest dam in the world once it is completed. It will be capable of generating 22,500 megawatts of power. Over 1,500,000 people will likely be displaced as result of living in the valleys above the dam. This fact, along with the potential loss of thousands of archaeological sites, has been a source of controversy since the project was conceived in the 1990s.