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U.S. Dams - Name, Location, Risk-Level, Purpose and Type of Dam
Download ArcGIS Shapefiles


These ArcGIS shapefiles work with the free ArcExplorer GIS viewer, ArcView GIS, ArcGIS, Maptitude, Mapinfo, Manifold, TatukGIS and many other commercial GIS and mapping programs and many free GIS programs as well. Use our free Learn2Map GIS Tutorial and Atlas to add streets, highways, census information and much more to your maps for free. We have included free national level base maps with each map archive listed below. Also, check our free GIS software and free GIS ArcGIS shapefiles pages for more information and free ArcGIS shapefiles. If you are new to GIS, check out our free Learn2Map GIS Tutorial and Atlas.

Shapefile Description

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.

With these detailed shapefiles you can learn more about dams and their condition anywhere in the United States.

Each shapefile includes access to complete metadata and free U.S. base map shapefiles. Base map shapefiles include:

  • Cities
  • Roads
  • Rivers
  • States
  • Water Bodies

Immediate Download

Each regional shapefile is $37. You can save and purchase all 10 regions for a total of $197. Click next to the shapefile you wish and you will have immediate access to it using our secure merchant account provider, ClickBank/Keynetics or PayPal, whichever you prefer.

Region 1 - Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont - Download Now.

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Region 9 - Arizona, California and Nevada - Download Now.

Region 10 - Idaho, Oregon, and Washington - Download Now.

Save - Purchase All Regions - All Regions - Download Now.

A Note About How Your GIS Maps Will Look

The image(s) on this page are examples of how these shapefiles may look when loaded into a GIS program. Your GIS maps may not look exactly like this. Each GIS program is different. Shapefiles themselves are a collection of points, lines or polygons. They have no attributes. It is up to you, the user, to define colors, line width, symbols and other attributes within the limits and capabilities of the GIS programs you are using.

Copyright and Use of Shapefiles

The shapefiles on this page are copyrighted as follows. Copyright © 2015 Michael R. Meuser, All Rights Reserved. You may use these shapefiles in any GIS project or to make maps. You may not create copies of the shapefiles for the use of others whether for personal or commercial use. You may not resell the shapefiles. If you require multiple copies of the same shapefile, please contact Mike at mike@mapcruzin.com. Thank You.

About Quality, Accuracy and Suitability

The geodata and shapefiles found at MapCruzin.com may come from a variety of government, non-governmental and self-reporting private sources. While we try to assure the accuracy of this material, we cannot promise that it is absolutely accurate. We do promise that using the map layer will be fun, entertaining or educational - possibly even frustrating. Beyond this, we make no guarantee as to its suitability for any purpose. We assume no liability or responsibility for errors or inaccuracies. Please understand that you download and use these map layers and data at your own risk.

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MapCruzin.com is an independent firm specializing in the publication of educational and research resources. We created the first U.S. based interactive toxic chemical facility maps on the internet in 1996 and we have been online ever since. Learn more about us and view some of our projects and services.

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