Barr Lake, reservoir (3 sq mi/7.8 sq km), Adams co., N central Colo., on Beebe Draw, 13 mi/21 km NE of Denver, and N of Denver Internatl. Airport; 39°57'N 104°45'W. Max. capacity 41,800 acre-ft. Formed by Barr Dam (44 ft/13 m high), built (1893) for irrigation.