It was constructed for hydroelectric power production and flood control.

[2] The dam is a 3,940 metres (12,930 ft) long and 67 metres (220 ft) high embankment dam with a concrete power station and spillway portion.

The volume of concrete in the dam structure is 1,500,000 cubic metres (53,000,000 cu ft).

The dam's spillway contains eight floodgates each with a maximum discharge capacity of 2,481 cubic metres per second (87,600 cu ft/s) for a total of 19,848 cubic metres per second (700,900 cu ft/s).

The dam's power station has a gross hydraulic head of 57 metres (187 ft) and contains six 232.7 MW (312,100 hp) generators powered by Francis turbines for a total installed capacity of 1,396.2 megawatts (1,872,300 hp).