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Kallanai Dam, Thiruchirapalli
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Kallanai is an ancient dam in the world which is built across the Kaveri River in Trichy District in the state of Tamil Nadu in South India. Located at a distance of 15 km from Tiruchirapalli, the dam was originally constructed by the Chola king Karikalan around the 2nd Century AD. and is considered to be one of the oldest water-diversion or water-regulator structures in the world which is still in use.HistoryThe dam was originally built by Karikala Chola around second century AD. The idea behind constructing the dam was to divert the river to the delta districts thereby boosting irrigation. The dam was re-modeled by the British during the 19th century. In 1804, captain Caldwell, a military engineer was appointed by the British to make a study on the Kaveri river and promote irrigation for the delta region. He found that a large amount of water passed onto the Kollidam leaving behind a small volume for irrigation purposes. Caldwell initially proposed a solution by raising the dam and hence raised the dam stones to a height of 0.69 m, thus increasing the capacity of the dam. Following this, Major Sim proposed the idea of undersluices across the river with outlets leading to the Kollidam River (Coleroon) thus preventing formation of silt. The Lower Anaicut built by Sir Arthur Cotton in 19th century AD across Coleroon, the major tributary of Cauvery, is said to be a replicated structure of Kallanai.
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  • This a result of vision, planning and execution of a fantastic river management system with perfection ages back. The dam is at the confluence of Coleron and Cauvery. Colereon (Kollidam in Tamil) is a...  more »
  • Its definitely an amazing and engineering knowledge incorporated by the Great Chola King Karikalan in 2nd Century , still standing as great structure.We took off bus to Grand Anaicut from Tanjore Main...  more »
  • Ancient dam can be seen here on the bank of river carvery. This dam is still under use for water distribution for agriculture purpose. 
  • wonderful! looked like this is the best tourist spot in trichy
  • Pleasing my eyes..the cholas dynasty's great monument
  • Nice and gigantic dam constructed by chola King...
  • A historical tourist attraction, which was built dates back to 1000s of years ago.
  • No water during summer!