Kallanai (Grand Anaicut) is a dam built across river Cauveri by Karikala Cholan in 2nd Century CE!
Kallanai is located ~ 20 Kms east of Tiruchirapalli (Trichy), TamilNadu.
Built during Sangam period, this 1900+ years old dam is probably the oldest water-diversion / water-regulation structure in the world still in use!
The purpose of the dam was to divert the waters of river Cauveri to the delta areas for boosting irrigation.
The dam is 1,079 feet long and 66 feet wide at its base.
Kallanai – An engineering marvel of those times, a standing testimony to human ingenuity!
Location: https://goo.gl/maps/iHqBHYVZbGER5Ctv5
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