Amaravathi Dam, Dam in Tiruppur district, Tamil Nadu, India

The Amaravathi Dam is a concrete dam across the Amaravathi River at Amaravathinagar, 25 km south of Udumalpet on SH 17 in the Indira Gandhi Wildlife Sanctuary. Its left side has a low wall with two small domed towers; the right side has a taller section with a vertical pillar, a metal gantry with a red hoist beam, and a steel truss deck. The lower concrete is stained brown, and a low railing with thin poles runs along the top deck.

The dam was built across the Amaravathi River in 1957, during K. Kamaraj's administration as Chief Minister, about 25 km upstream and south of the Thirumoorthy Dam. It was built primarily for irrigation and flood control. Siltation has cut the reservoir's capacity by 25%, from 4 tmcft to 3 tmcft. In 2003–04 the Tamil Nadu Electricity Board planned a 4 MW hydro-electric station, now operating.

The Fisheries Department formed the Amaravathi Nagar Tribal Fishermen Cooperative Society to grant fishing rights to tribal people; in 2007, fifty residents of Karattupathi settlement joined, and eight received a fishing licence. Tilapia, introduced in the 1950s, now dominates the catch, with cast nets used for subsistence fishing.

The dam lies 25 km south of Udumalpet on SH 17, inside the Indira Gandhi Wildlife Sanctuary; from Coimbatore the road runs via Pollachi and Udumalpet, about 96 km. The park and the crocodile farm, 1 km before the dam site, are open daily from 9:00 a.m. to 6:00 p.m. Steep steps on the dam lead up to views north over the plains and south to the Anaimalai and Palni Hills. A forest rest house near the crocodile farm sleeps four with advance reservation.

The reservoir is home to a large population of mugger crocodiles that are part of the Indira Gandhi Wildlife Sanctuary. These reptiles are often spotted in the water, making the area an unexpected place for wildlife watching.