The reservoir was designed and constructed by the Sri Lanka Mahaveli Authority and currently functions under the direction of the Ministry of Irrigation and Water Resources Management.

[4] There are archaeological evidences, those reveals about previous attempts to construct an irrigation tank here during the ancient time periods.

It is believed that construction of Rambaken Oya Reservoir was commenced by prince Giri Abaya who ruled the East, in third century, B.C.

It describes that the stone canal was built by Liyana Nayakayan and Kanathkan Vahanse, who lived in the Gal Weta area.

[6] The recent project to develop the Rambakan Oya reservoir was commenced on 12 February 2007[7] and the opening ceremony was held on 20 July 2013 with the participation of then Sri Lanka President Mahinda Rajapaksa and Irrigation and Water Resources Management Minister.