Joysagar Tank

Joysagar Tank, also known as Joysagar Borpukhuri, is a large artificial lake in Joysagar, Sivasagar district, Assam, about 5 km from Sivasagar town. Excavated in 1697 by Ahom king Swargadeo Rudra Singha in memory of his mother Sati Joymoti, it covers about 318 acres and is considered the largest man-made tank in India. The tank is flanked by historic temples including Joy Dol and is a prominent heritage and scenic attraction of Upper Assam.

Visitors can expect a vast, rectangular man-made water body with earthen embankments and tree-lined banks. The tank is surrounded by open parkland and historic Ahom-era temples, most notably Joy Dol (Vishnu Dol) on its northern bank. The setting is calm and scenic, suitable for leisurely walks, photography and viewing migratory birds in winter. There are no boating facilities; the experience is primarily sightseeing and exploring the temple complex and lakeside surroundings.

Joysagar Tank was excavated in 1697 by Ahom King Swargadeo Rudra Singha (Sukhrungphaa) in memory of his mother Sati Joymoti Konwari. According to historical records, the 318-acre tank was dug within 45 days. It is regarded as the largest man-made tank in India and represents the hydraulic engineering and town-planning skills of the Ahom dynasty. The Joy Dol (Keshavanarayan Temple) and other temples on its banks were also built by Rudra Singha, forming a significant Ahom architectural complex.

The tank is dedicated to Sati Joymoti, revered in Assamese culture as a symbol of sacrifice and maternal devotion. The associated Joy Dol is a Hindu temple dedicated to Lord Vishnu and remains an active place of worship. The site is an important cultural landmark of Upper Assam and part of the Sivasagar group of Ahom monuments that reflect the religious and cultural traditions of the Ahom period.