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Major Dams of the United States |
What this map layer shows:
More than 8,100 major
dams. |
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Background Information |
Sample Map
The National
Inventory of Dams (NID) is a collection of information about
dams in the United States and its territories, produced by the U.S.
Army Corps of Engineers (USACE). The USACE works closely with the Association
of State Dam Safety Officials (ASDSO), the Federal
Emergency Management Agency, and other State and Federal agencies to update and publish the
NID. The National Inventory of Dams contains more than 79,000 dams, provided
voluntarily by a wide variety of agencies. This information is used to
track information on the country's water control infrastructure and to
allocate Federal resources for dam safety programs.
The Major Dams of the United States map layer is a subset of the
2005 National Inventory of Dams, extracted by the National Atlas
of the United States®. It lists and describes more than 8,100
major dams in the United States, Puerto Rico, and the U.S. Virgin
Islands. Major dams include dams 50 feet or more in height, dams
with a normal storage capacity of 5,000 acre-feet or more, and
dams with a maximum storage capacity of 25,000 acre-feet or more.
Descriptive information includes the dam name and location, the
risk level associated with the dam, the purposes for which the
dam was constructed, and the dam type. |
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Water |
Map Maker Sample |
Dams |
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