Kaptai lake is a man made lake in south-eastern Bangladesh. It is placed in the Kaptai Upazila under Rangamati District of Chittagong Division. The lake was twisted as a result of building the Kaptai Dam on the Karnaphuli River, as part of the Karnaphuli Hydro-electric project.
The Kaptai Lake's standard depth is 100 feet (30 m) and maximum depth is 490 feet (150 m).
Creation of the tank for the hydro-electric plant begin in 1956 by the administration of East Pakistan.
As a result, 54,000 acres (220 km2) of farmland in the Rangamati District went under water and twisted the lake. The hydro-electric project was funded by the United States. The project was finished in 1962. International engineering friendship and Utah International Inc. conventional the agreement for construction of the dam. The dam is 670.8 meters long, and 54.7 meters high.
The block has a 745 feet (227 m) long spillway containing 16 gates. Through the spillway 5,250,000 cu ft/s (149,000 m3/s) of water can pass. The land that went under water as a result of the dam production was 40% of the total arable land in the area.
Along with that, 29 square miles (75 km2) of the Government-owned forest, and 234 square miles (610 km2) of other woods land went under water. About 18,000 families with a total of almost 100 thousand people were also displaced. The palace of the king of the Chakmas was also flooded and is now below water