a canyon in central Washington State, over 120 m (400 ft) deep, at the N end of which is situated the Grand Coulee Dam, on the Columbia River. Height of dam: 168 m (550 ft). Length of dam: 1310 m (4300 ft)
Grand Coulee in American English
(ˈkuli)
dam on the Columbia River, NE Wash.: 550 ft (167 m) high; over 4,000 ft (1,220 m) long