[1] Construction of the dam began in November 1982, and was completed in approximately 4 years.

[1] Three large controlled tainter gate chute spillways, with a combined discharge volume of 8,100 m3/s (290,000 cu ft/s), are constructed at the southern end of the dam.

With a catchment area of 2,330 km (1,450 mi) and a total storage capacity of 861,000,000 m3 (3.04×1010 cu ft), Randenigala is one of the largest reservoirs in the country.

[1] The power station is located immediately downstream of the dam, on the left bank.

[1] The plant consists of two generators with a rated capacity of 63 MW each, powered by two francis turbines.