Introduction to the barrage: The main buildings of the project include the barrage, diversion tunnel, flood discharge tunnel and power plant building. The barrage is a concrete gravity arch dam with a height of 221.4m, a crest length of 379m, a crest width of 13.6m, a maximum width of the dam bottom of 202m, a crest radius of 152m, a central angle of 138°, and a concrete pouring volume of 2.485 million cubic meters.