the first underwater tunnel in Bangladesh. CCCC will receive $706 million for its services with total costs expected to be over $1 billion. Aquatic life The river is home to Ganges river dolphin, which is an endangered species. Hilsa used to be common in the river, but have nearly disappeared from the river due to pollution. Kaptai dam The Kaptai Dam is the location of the Karnafuli Hydroelectric Power Station, constructed in Kaptai in 1962 and the only hydro-electric power plant in the country. An earth-filled dam on the Karnaphuli River, the Kaptai Dam created the Kaptai Lake, which acts as the water reservoir for the hydropower station. The power plant produces a total of 230 megawatts of electricity. When then east Pakistan built the dam, Indian Prime Minister Jawaharlal Nehru didn't object even though it resulted in part of Indian side getting submerged and inflow of more than 40000 refugees. Pollution Like many rivers in Bangladesh, Karnaphuli is heavily polluted by agricultural runoff. Reducing the amount of oxygen available and harming aquatic life in the river. In 2015, a train carrying oil crashed over a tributary of the river. The spill caused environmental degradation. Gallery See also List of rivers in Bangladesh References Rivers of Bangladesh Rivers of Mizoram Rivers of India Rivers of Chittagong Division International rivers of Asia