The Yantan Dam (Chinese: 岩滩大坝; pinyin: Yántān Dàbà) is a gravity dam on the Hongshui River near Dahua County, Guangxi China.

The dam was placed on the state key project list in 1984 and construction began in March 1985.

By November 1987, the river was diverted and in March 1992, the dam began to impound the reservoir.

[1] The facility is composed of the dam, its power station and a ship lift.

The dam's spillway contains seven radial steel gates with a maximum discharge capacity of 33,400 m3/s (1,179,510 cu ft/s).