The Hudson River-Black River Regulating District (HRBRRD) is a New York state public-benefit corporation that traces its formation to the creation of the Black River Regulating District in 1919, and the Hudson River Regulating District in 1922 in response to the severe historical flooding of the cities of Albany, Green Island, Rensselaer, Troy, and Watervliet by the Sacandaga River and Hudson River and its tributaries. The HRBRRD, formed in 1959 by combining the two entities, collects excess runoff to reduce flooding impacts in the Hudson River and Black River basins, and releases this captured water gradually during periods of low river flow to maintain water quality in each river basin. This system was designed to reduce damage from spring storms and snowmelt, including disease and destruction of life and property, and to improve river navigation and public sanitation. The HRBRRD was also formed with hydroelectric generation in mind. It owns and operates several dams - including the Conklingville Dam which formed the Great Sacandaga Lake - and reservoirs.