The Sanmenxia Dam is a concrete gravity dam on the middle-reaches of the Yellow River near Sanmenxia on the border Shanxi and Henan Province, China. The dam is multi-purpose and was constructed for flood and ice control along with irrigation, hydroelectric power production and navigation. Construction began in 1957 and was completed in 1960. It is the first major water control project on the Yellow River and was viewed as a major achievement of the new People's Republic of China.