This dataset contains the 14 major reservoirs in the Powder/Tongue River Basin Planning Area. All surface water storage in structures containing more than 50 acre-feet of storage or more than 20 feet high (meeting the minimum standards for inclusion in the Dam Safety database) were initially selected. These selection criteria produced a set of 189 surface water storage facilities. The State Engineer's Office Water Division Two commissioners agreed that a further set of criteria should be introduced to provide a list from which the dams of particular significance to the basin could be developed. Commissioners agreed that in almost all cases, a limit of 1,000 acre-feet capacity and "serving multiple users" produced a list of reservoirs significant to the basins. The only recommended exception was Cross Creek Reservoir, which has a normal capacity of 798 acre-feet. This inclusion brought the secondary selection list to 14. This dataset shows the locations of the 14 significant reservoirs and, with the complementary Major Reservoirs Water Rights dataset (a dbase table), contains the pertinent water rights and storage information for each reservoir.
