The Sivsagar tank was built by Bar Raja Ambika, the chief consort of Siva Singha in 1733. A battle was fought against the Moamoria rebels In its vicinity in the reign of Gaurinath Singha.The Sivasagar tank, also known as the Borpukhuri tank, was built by constructing embankments and the water level thus created in the lake remains above the adjoining ground level.
Bar Raja Ambika, the consort of Siva Singha, built the Sivsagar tank in 1733. A conflict took place against Moamoria rebels near it during Gaurinath Singha's reign. The Sivasagar tank, also known as Borpukhuri tank, was constructed by creating embankments and retains a higher water level than the surrounding ground.