Beaver Creek Reservoir, Rio Grande co., S Colo., on Beaver Creek, 16 mi/26 km WSW of Del Norte, in Rio Grande Natl. Forest; 1.5 mi/2.4 km long; 37°35'N 107°37'W. Max. capacity of 5,702 acre-ft. Formed by Beaver Park Dam (96 ft/29 m high), built (1970) by the Colo. Dept. of Natural Resources for irrigation.