Most of the U.S. 's taller dams are located in the west because of the steeper and more rugged topography. The tallest is Oroville Dam in northern California, a 770.5 - foot (234.8 m) embankment dam completed in 1968. Five of the ten highest dams in the U.S. are located in California. The Colorado, Columbia and Sacramento -- San Joaquin river systems contain the greatest number of high dams. In the eastern U.S., tall dams are less common because of the lesser vertical relief. The tallest dam in the eastern U.S. is 480 - foot (150 m) Fontana Dam in North Carolina, which ranks 20th in height among all U.S. dams.
what's the largest dam in the united states
Oroville Dam