The Amaravathi Dam is a dam constructed by the Amaravathi River. It is located at Amaravathinagar, 25 kilometres (16 mi) south of Udumalpet on SH 17 in the Indira Gandhi Wildlife Sanctuary, Tirupur district in the Indian state of Tamil Nadu. The associated Amaravathi Reservoir is 9.31 square kilometres (3.59 sq mi) in area and 33.53 metres (110.0 ft) deep.[1] The dam was built primarily for irrigation and flood control and now also has four megawatts of electrical generating capacity installed. It is notable for the significant population of mugger crocodile s living in its reservoir and catchment basin. The largest wild breeding population of crocodiles in South India live in the reservoir, and in the Chinnar, Thennar and Pambar rivers that drain into it. These broad-snouted mugger crocodiles, also known as marsh crocodiles and Persian crocodiles, are the most common and widespread of the three species of crocodiles found in India. They eat fish, other reptiles, small and large mammals and are sometimes dangerous to humans. Their total wild population here is currently estimated to be 60 adults and 37 sub-adults. Other fish predators here include: Oriental small-clawed otters, Indian cormorants and Indian flap-shelled turtles