<Tr> <Td> Download coordinates as: KML GPX </Td> </Tr> <P> This is a list of the tallest dams in the United States . The main list includes all U.S. dams over 300 feet (91 m) high, and a second list gives the highest dams in each state . Dimensions given are for foundation height, not hydraulic height or head . Structures such as levees, dikes and tailings dams are not included in the lists . Decommissioned or failed dams, such as Teton Dam in Idaho, are included . Both lists are works in progress and will be updated periodically with new information . There are currently 75 entries on the main list . </P> <P> 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 . </P> <Table> <Tr> <Th_colspan="all"> Key </Th> </Tr> <Tr> <Td> Dam has been raised since initial construction </Td> </Tr> </Table>

What's the largest dam in the united states