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(Placename) a dam in the western US, on the Colorado River on the border between Nevada and Arizona; forms Lake Mead. Height: 222 m (727 ft). Length: 354 m (1180 ft). Former name (1933–47): Boulder Dam
a dam on the Colorado River, on the boundary between SE Nevada and NW Arizona. 726 ft. (221 m) high; 1244 ft. (379 m) long. Official name, Hoover Dam.