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 principal wife of Siva Singha, constructed the Sivsagar tank in 1733. A battle occurred against Moamoria rebels near it during Gaurinath Singha's reign. The Sivasagar tank, also known as Borpukhuri tank, was built by constructing embankments and maintains a higher water level than the surrounding ground.