Lake Dukan

The surface area of the lake is 270 square kilometres (100 sq mi). At normal operation, the capacity of the reservoir is 6.8 cubic kilometres (1.6 cu mi) while its maximum capacity is 8.3 cubic kilometres (2.0 cu mi). At that capacity, the surface elevation is 515 metres (1,690 ft) above sea-level. In order to operate the power station, the surface elevation must be between 469 and 511 metres (1,539 and 1,677 ft). The drainage basin of the Dukan Dam is 11,700 square kilometres (4,500 sq mi).