The Three Gorges Dam Project is the world’s largest hydropower complex project located in one of the three gorges of the Yangtze River: the Xilingxia Gorge in Hubei province, China. The dam’s name refers to the majestic limestone cliffs of the Qutang, Wu, and Xiling gorges, which stretch for about 200 kilometers from Fengjie. Construction of the controversial Three Gorges Dam began in 1994. Its first turbine was connected to the grid in 2003, with the final one was connected up in 2012. Made of concrete and steel, the dam is 2,335 m long and the top of the dam is 185 metres above sea level. The project used 27.2 million cubic metres of concrete , 463,000 tonnes of steel and moved about 102.6 million cubic metres of earth. A total of 1.3 million people had to be relocated from their homes.