The dam impounds the Pattani River, creating the Bang Lang Reservoir.

The dam and its accompanying power plant were developed as part of the Pattani Project.

Its reservoir has a maximum storage capacity of 1,420,000,000 m3 (5.0×1010 cu ft) with a catchment area of 2,080 km2 (800 sq mi).

[1] The dam is considered multi-purpose supporting electricity generation, irrigation, flood control, fisheries and recreation activities.

[2] The dam's power plant has three hydroelectric Francis turbine-generating units, each with an installed capacity of 24 MW.