The Lianghekou Dam is an under construction concrete face rock-fill embankment dam

Embankment dam

An embankment dam is a massive artificial water barrier. It is typically created by the emplacement and compaction of a complex semi-plastic mound of various compositions of soil, sand, clay and/or rock. It has a semi-permanent waterproof natural covering for its surface, and a dense, waterproof...

 on the Yalong River

Yalong River

The Nyag Qu or Yalong River, also called Ya-lung River is an 822 mile long river in the Sichuan province of southern China. It flows into the Yangtze River along the border with Yunnan. It is a tributary of the Yangtze River...

 in Yajiang County

Yajiang County

Nyagqu County or Yajiang County is a county of Sichuan Province, China. It is under the administration of the Garzê Tibetan Autonomous Prefecture....

, Sichuan Province, China

China

Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...

. The dam is located at the confluence of the Yalong, Xianshui

Xianshui River

Xianshui River is a river in Sichuan, China, and a tributary of the Yangtze. It has two sources, the rivers of Da-chu and Nyi-chu . From the confluence of the two rivers in Luhuo, the name changes to Xianshui River. It flows into the Yalong River at Yajiang. A hydroelectric plant in Luhuo was...

 and Qingda Rivers. The dam will be tall and support a 3,000 MW power station. Studies for the dam were completed between 2005 and 2009 with initial construction beginning that year.

When the dam's reservoir fills, it will force the relocation of over 4,900 people.