Kallanai (otherwise called the Grand Anicut) is an old dam. It is underlying (running water) over the Kaveri waterway spilling out of Tiruchirappalli District to the Thanjavur region. Situated a ways off of 45 km from Thanjavur, 15 km from Tiruchirappalli, the dam was initially built during the reign of Chola lord Karikalan in c. 100 BC – c. 100 AD.
It is the fourth most seasoned water preoccupation or water-controller structures on the planet and the most seasoned in India which is as yet being used. Due to its breathtaking design it is one of the prime places of interest in Tamil Nadu.
The dam was initially worked by King Karikalan of the Chola Dynasty in c. 100 BC – c. 100 AD. It is situated on the River in Tiruchirappalli District, roughly 15km from the city of Tiruchirappalli and 45km from the city of Thanjavur. The thought behind the development of the dam was to occupy the stream to the delta areas in this way boosting water system.
The dam was re-demonstrated by the British during the nineteenth century. In 1804, Captain Caldwell, a military designer, was designated by the British to make an investigation on the Kaveri stream and advance water system for the delta area. He found that a lot of water passed onto the Kollidam deserting a little volume for water system purposes.
Caldwell at first proposed an answer by raising the dam and subsequently raised the dam stones to a tallness of 69 centimeters (27 in), in this way expanding the limit of the dam. Following this, Major Sim proposed the possibility of under sluices over the waterway with outlets prompting the Kollidam River (Coleroon) hence forestalling the arrangement of sediment. The Lower Anaicut worked by Sir Arthur Cotton in the nineteenth century CE across Coleroon, the significant feeder of Cauvery, is supposed to be a repeated structure of Kallanai