Amaravathi Reservoir is located at Amaravathinagar, very close to the Indira Gandhi Wildlife Sanctuary in Coimbatore district, Tamil Nadu. The location of Amaravathi Reservoir coordinates 10°24.64?N, 77°15.6?E. The Amaravathi Reservoir encompasses 9.31 km² and is almost 33.53 m deep.

This reservoir was the creation of the steep Amaravathi Dam. The dam was built in 1957 during the K. Kamaraj administration across the Amaravathi River about 25 km upstream and lies south from Thirumoorthy Dam. Capacity of the dam has reduced from 4 TMCFT to 3 TMCFT due to heavy siltation. The Amaravathi Reservoir was built primarily for irrigation and flood control between 2003-04, the Tamil Nadu Electricity Board designed to establish 4 MW electric generating capacity from the dam.

The Amaravathi Reservoir is a great breeding place for several kinds of fish. The non-indigenous fish tilapia is a major portion of the fish preserved in the reservoir. There is a well laid-out park near to the reservoir, where the tourists climb steep steps on the dam to have a panoramic view north of the plains below and south to the Anaimalai Hills and Palni Hills above. This place lies 25 km from Pollachi is also being developed as a District Excursion Centre for tourism.

The largest population of wild Crocodiles in Tamil Nadu lives in the Amaravathi Reservoir. These crocodiles breed in the Chinnar, Thennar and Pambar rivers that drain into this reservoir. These broad-snouted Mugger Crocodiles are also known as Marsh Crocodiles and Persian Crocodiles. These species are the most widespread of the three species of crocodiles found in India. They eat fish and other reptiles, both small and large mammals and are sometimes unsafe to humans.

The Amaravati Sagar Crocodile Farm was established in 1975; the largest Crocodile nursery in India is close to the Amaravathi Reservoir. Crocodiles of all sizes can be seen basking in the sun and suddenly striding along the beach or piled up on one another. Eggs are collected from wild nests along the boundary of the reservoir to be hatched and bred at the farm. There are now 430 animals maintained in custody. Many matured crocodiles have been reintroduced from here into the wild zones of the nation. Three Forest Department personnel manage and maintain the Amaravathi Reservoir for forest species.