Cochrane Dam (KAHK-ruhn), Cascade co., W central Mont., on the Missouri R., 7 mi/11.3 km NE of Great Falls; 102 ft/31 m high; 47°33'N 111°10'W. Built (1957) by the Mont. Power Co. for power generation. Forms minor reservoir with max. capacity 9,900 acre-ft. Power plant on N side.