Tungabhadra dam is constructed across river Tungabhadra, a tributary of Krishna river. The dam is built near the town of Hospet. It is considered as a multipurpose dam or project. Its storage capacity is 135 Tmcft. Owing to siltation the capacity has been reduced by about 30 Tmcft ft. If there are seasonal and late rains, the dam distributes the estimated quantity of 235 Tmcft. The dam is filled as when the water is let into the canals during the rainy season. The main architect of the dam was Dr. Thirumalai Iyengar, an engineer from Madras. As Tungabhadra Dam was constructed by him, so a general purpose hall in this place was named after him. Multipurpose dams are the one's which help in generation of electricity, irrigation of land, Prevention and control of floods etc.
The dam is 15 km downstream from Shimoga at Gajanur across the River Tunga, a Dam is constructed. At Lakkavalli about 15 km upstream of Bhadravati across the bhadra a dam is constructed. These dams are to irrigate lands in Shimoga, Chikkamagalur, Devanagere and Haveri.