Papanasam Dam is situated 49 km from Tirunelveli in Tamil Nadu, while the Manimuthar Dam is 47 km from the same. Papanasam dam is constructed on Tamirabarani River to irrigate about 34,846 hectares of paddy field of Tirunelveli and Tuticorin districts. The British constructed the Papanasam Dam in 1942. It is 744 feet long, 200 feet high and 5.4 meters wide. The total capacity of this dam is 5500 million cusec feet. Water of this dam is spread over 2.24 square miles area. During overflow, water flows at 8000 cusec feet per second.The design capacity of Papanasam Hydroelectric Power Plant is 28 MW. It features four Francis turbine generators. The first unit of this plant was commissioned in 1944 and the last unit in 1951. Tamil Nadu Generation and Distribution Corporation Ltd operate this plant.