The Bang Lang Dam , also known as the Pattani Dam, is a multi purpose hydroelectric dam in the Bannang Sata District of Yala Province , Thailand. It was the first multi purpose dam developed in Thailand's southern region.Bang Lang Dam is an earth core rockfill dam. It is 430m (1410ft) long and 85m ( 279ft)high. Its reservoir has a maximum storage capacity of 1,420,000,000 Cubic Meter (m3)
( 5.0 x 1010 cu ft) with catchment area of 2,080 km2 Square kilometers.
The dam is considered multi purpose supporting electricity generation, irrigation , flood control, fisheries and recreation activities.