About Kallanai Grand Anicut
Kallanai Grand Anicut is an ancient dam across the Kaveri River at Kallanai on the border of Thanjavur and Tiruchirappalli districts, about 15 km from Tiruchirappalli. Built by Chola King Karikala in the 2nd century CE, it is considered one of the oldest water-diversion structures in the world still in use. The dam diverts the Kaveri into four branches and remains a major irrigation structure and popular heritage attraction.
Visitors guide
Visitors can expect a long stone masonry anicut structure across the wide Kaveri River with sluices and shutters, views of water flow especially when shutters are open, river islands and channels, a small park and garden area on the riverbank, paved walkways and viewpoints for photography, and interpretive displays about its ancient engineering. The setting is open and scenic with river views, palm trees and agricultural landscape.
Key highlights
- 01
One of the oldest dams in the world still in use, built in 2nd century CE by Karikala Chola
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Ancient stone masonry anicut diverting Kaveri River into Kollidam, Vennar, Kaveri and Puthu Aaru branches
- 03
Remodelled in the 19th century by British engineer Captain J. Caldwell with modern sluices
- 04
Scenic river views and photography points across the Kaveri
- 05
Adjacent park and picnic area on the riverbank
- 06
Important living heritage of Tamil Nadu's irrigation system
History of Kallanai Grand Anicut
Built by Chola King Karikala in the 2nd century CE (around 150 CE) across the Kaveri River to divert water for irrigation in the delta region. It is regarded as one of the oldest functional water regulation structures in the world. In the 19th century, British engineer Captain J. Caldwell remodelled and raised the dam and added sluices to improve irrigation efficiency, preserving its original foundation.
Culture & Context
Revered as a masterpiece of ancient Tamil engineering and Chola heritage, the anicut symbolizes Tamil Nadu's long tradition of water management and agriculture. It continues to irrigate the fertile Kaveri delta, supporting local farming culture, and is celebrated as a heritage landmark of Tamil identity and engineering skill.