The Wanjiazhai Dam is a gravity dam on the Yellow River on the border of Pianguan County, Shaanxi Province (east bank) and Inner Mongolia Autonomous Region (west bank), China.

On October 1, 1998, the dam began to impound the reservoir and the first generator went online on November 28, 1998.

[2] Also known as the Wanjiazhai Water Transfer Project or Shanxi Wanjiazhai Yellow River Diversion Project, it is designed to alleviate water shortages in Taiyuan, Shuozhou and Datong and provide electricity for areas around the dam.

The North Main, beginning at Xiatuzhai, travels northward for a distance of 167 km (104 mi) at a rate of 22.2 m3/s (784 cu ft/s), being assisted during its route by the Daliang Reservoir and pump station.

The entire cost of the project is $1.5 billion, $500 million is being funded by the World Bank.