The Mettur Dam was constructed in a gorge, where river Cauvery enters the plains. Mettur Dam is one of the oldest dams in India. It provides irrigation to Salem, erode, karur, tiruchirappalli, thanjavur, tiruvarur and Nagapattinam.
It irrigates 2,71,000 acres of farms. It also serves as Park, Major Hydroelectric power stations, and important tourist spots.
Bhavani Sagar Dam
It is situated 80 km away from Coimbatore city in Erode district. This dam is constructed across the river Bhavani.
It is one of the biggest earthen dams in the country.
It is located 25 km away from Udumalpet in the Tirupur district. The dam is constructed across the Amaravathi, which is the Tributary of Cauvery.
This dam is primarily built for flood control and irrigation. This reservoir is famous for mugger crocodiles and also it is a tourist spot.
Krishnagiri Dam is a dam that spans the Thenpennai River by the village of Dhuduganahalli, located in the Krishnagiri district
It is located 7km from Krishnagiri towards Dharmapuri and drains an area of 5428 sq. km.
It is located across the river Thenpennai in Chengam Taluk. Sathanur Dam is in the midst of Chenaakesava hills.
It can hold 7321 million cubic feet (119 feet). It drains about 7183 hectares of land by the left canal and 905 hectares of land by the right canal.
It provides irrigation for Thandrampet and Tiruvannamalai Blocks. There is also a crocodile farm and a fish grotto in the dam. There is a good tourist spot.
Mullaiperiyar dam was built by the British Administration in 1895. It is built on the Periyar river that originates from Thekkady in Kerala.
The dam builds mainly for irrigation, which is perennially drought-prone. Most of the water is used by Tamil Nadu, even though it is located in Kerala. The height of the dam is 175 feet and 1200 in width.
Vaigai Dam was built across the river Vaigai near Andipatti. The dam’s height is 111 feet and can store water up to 71 feet.
It is located 7 km from Andipatti and 70km from Madurai. This dam was opened on 21 January 1959.
The dam is also called Little Brindavan, for its unique garden. It is a popular picnic spot in the Theni district.
It is located about 47 km from Tirunelveli and is built on the Tamirabarani river.
There is a beautiful garden located about 5km from the dam and it is accessible through a zig-zag ghat road. Boating and waterfall are its tourist attractions.
The Papanasam Dam
Papanasam Dam is also known as Karaiyar dam and is located about 49km away from Tirunelveli. It is used to irrigate 34,861 hectares of land in the Tirunelveli and Thoothukudi districts.
It generates 28 MW of Hydro Power.
Parampikulam Aliyar Project
It is a joint project of Tamil Nadu and Kerala. This project proposes the construction of seven interconnected reservoirs by harnessing the water of seven rivers.
These river include Parambikulam, and Aliyar. Parappalar project is located near Ottanchatram and its storage capacity is 167 million cubic feet of water.
It is about 75 km from Madurai and is in Palani Taluk.