The Ertan Dam is an arch dam on the Yalong River, a tributary of the Yangtze River in Sichuan Province, southwest China.
The dam has six hydroelectric generators, each with a generating capacity of 550 MW. The total generating capacity of the facility is 3,300 MW, one of the largest hydroelectric stations in China. The annual production is 17 TWh, and until December 5th 2006, it has produced over 100 TWh of electricity. Construction of the dam started on September 1991 and was completed on December 26, 1999. A total of 12,638,000 m3 (446,306,758 cu ft) of material was excavated during construction.