| Shuangjiangkou Dam | |
| Location Map: | China |
| Country: | China |
| Location: | Sichuan Province |
| Status: | Under construction |
| Construction Began: | 2013 |
| Cost: | US$4.02 billion (¥24.68 billion, £2.9 billion) |
| Owner: | State Power Dadu Hydropower Development Co., Ltd. |
| Dam Type: | Embankment, rock-fill |
| Dam Crosses: | Dadu River |
| Res Name: | Shuangjiangkou Reservoir |
| Plant Hydraulic Head: | (mean) |
| Plant Commission: | 2023 |
| Plant Type: | Conventional |
| Plant Turbines: | 4 × 500 MW Francis-type |
| Plant Capacity: | 2,000 MW |
| Plant Annual Gen: | 8,341 GWh[1] |
The Shuangjiangkou Dam (Chinese: 双江口大坝/双江口水电站), also referred to as Shuang Jiang Kou (Chinese: 双江口), is an embankment dam currently being constructed in a gorge on the Dadu River in Sichuan Province, China. When completed, the dam will be the tallest dam in the world.[2] Preliminary construction began in 2008 and the entire project was expected to be complete in 2018.[3] By April 2011, over of material had been excavated from the construction site.[4] In March 2013, China's Ministry of Environmental Protection approved construction on the dam's superstructure and associated facilities. The government acknowledged that the dam would have negative impacts on the environment but that developers were working to mitigate them. The dam is being built by the Guodian Group at a cost of US$4.02 billion.[5] The entire construction period is expected to last 10 years.[6] All turbines are expected to be commissioned by 2023.[7]
The Shuangjiangkou Dam, when completed, will be a (from the foundation) and rock-fill dam with a relatively impervious core. The dam's crest width will be, its elevation above sea level. It will have a structural volume of approximately . The dam will sit at the head of a drainage basin and have a reservoir capacity of of which is regulating or active (useful) storage. Normal reservoir elevation will be and minimum . Flood elevations range between . The dam's power station will contain four 500 MW Francis turbine-generators for an installed capacity of 2000 MW. Firm capacity of the power station is expected to be 503 MW along with the station operating for 4064 hours each year. The power station's design flow is and the mean hydraulic head .[2]