U.S. Dam Inventory

This map layer portrays major dams of the United States, including Puerto Rico and the U.S. Virgin Islands. The map layer was created by extracting dams 50 feet or more in height, or with a normal storage capacity of 5,000 acre-feet or more.
Parameters also included a maximum storage capacity of 25,000 acre-feet or more. The information was drawn from the 79,777 dams in the U.S. Army Corps of Engineers National Inventory of Dams.
Map created by MapNard.

Dams Legend

Built before 1900
Built 1900 - 1925
Built 1925 - 1950
Built 1950 - 1975
Built before 2000