Major Dams: United States and Territories, 2006

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Abstract/Contents

Abstract
This point shapefile depicts major dams in 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, or with a maximum storage capacity of 25,000 acre-feet or more, from the 79,777 dams in the U.S. Army Corps of Engineers National Inventory of Dams. This is a replacement for the April 1994 map layer. In the online National Atlas of the United States Map Maker, at scales smaller than 1:4,850,000 the data is thinned for display purposes. For scales between 1: 4,850,000 and 1:22,000,000, dams are only shown if they have a height of 500 feet or more, or a normal storage capacity of 50,000 acre-feet or more, or a maximum storage capacity of 250,000 acre-feet or more (1280 dams). At scales smaller than 1:22,000,000, dams are only shown if they have a height of 5,000 feet or more, or a normal storage capacity of 500,000 acre-feet or more, or a maximum storage capacity of 2,500,000 acre-feet or more (290 dams). Data of dams 50 feet or more in height, or with a normal storage capacity of 5,000 acre-feet or more, or with a maximum storage capacity of 25,000 acre-feet or more, is from the United States Army Corps of Engineers National Inventory of Dams and was compiled in 2006. This layer is part of the 2014 National Transportation Atlas Database.
Purpose
The National Transportation Atlas Databases 2014 (NTAD2014) is a set of nationwide geographic datasets of transportation facilities, transportation networks, associated infrastructure, and other political and administrative entities. These datasets include spatial information for transportation modal networks and intermodal terminals, as well as the re¬lated attribute information for these features. This data supports research, analysis, and decision-making across all transportation modes. It is most useful at the national level, but has major applications at regional, state and local scales throughout the transportation community. The data used to compile NTAD2014 was provided by our partners within the United States Department of Transportation (USDOT) and by other agencies throughout the United States Federal Government. These contributors are the actual data stewards and are ultimately responsible for the maintenance and accuracy of their data. This data is intended for geographic display and analysis at the national level and for large regional areas. The data should be displayed and analyzed at scales appropriate for 1:2,000,000 scale data. No responsibility is assumed by the National Atlas of the United States in the use of these data.

Description

Type of resource cartographic, software, multimedia
Form Shapefile
Extent 0.217
Place Washington, DC, US
Publisher United States. Bureau of Transportation Statistics
Date valid 2006
Publication date 2014
Edition dams v. 2
Language English
Digital origin born digital
Map data Scale not given. ; W 162°52ʹ40ʺ--W 66°54ʺ/N 68°4ʹ10ʺ--N 18°1ʹ2ʺ, Scale not given ; EPSG::4326

Creators/Contributors

Creator Rawson, Peg

Subjects

Subject Dams
Subject Reservoirs
Subject Hydrography
Subject United States
Subject Washington (D.C.)
Subject United States Virgin Islands
Subject Puerto Rico
Subject American Samoa
Subject Northern Mariana Islands
Subject Guam
Subject Alaska
Subject Alabama
Subject Arkansas
Subject Arizona
Subject California
Subject Colorado
Subject Connecticut
Subject Delaware
Subject Florida
Subject Georgia
Subject Hawaii
Subject Idaho
Subject Iowa
Subject Illinois
Subject Indiana
Subject Kansas
Subject Kentucky
Subject Louisiana
Subject Maine
Subject Massachusetts
Subject Maryland
Subject Michigan
Subject Minnesota
Subject Missouri
Subject Mississippi
Subject Montana
Subject North Carolina
Subject North Dakota
Subject Nebraska
Subject New Hampshire
Subject New Jersey
Subject New Mexico
Subject Nevada
Subject New York
Subject Ohio
Subject Oklahoma
Subject Oregon
Subject Pennsylvania
Subject Rhode Island
Subject South Carolina
Subject South Dakota
Subject Tennessee
Subject Texas
Subject Utah
Subject Vermont
Subject Virginia
Subject Wisconsin
Subject Washington
Subject West Virginia
Subject Wyoming
Subject 2006
Subject Inland Waters
Subject Location
Subject Utilities and Communication
Genre Geospatial data
Genre Cartographic dataset

Bibliographic information

Supplemental information

In the online National Atlas of the United States Map Maker, at scales
smaller than 1:4,850,000 the data is thinned for display purposes. For
scales between 1: 4,850,000 and 1:22,000,000, dams are only shown if they
have a height of 500 feet or more, or a normal storage capacity of 50,000
acre-feet or more, or a maximum storage capacity of 250,000 acre-feet or
more (1280 dams). At scales smaller than 1:22,000,000, dams are only
shown if they have a height of 5000 feet or more, or a normal storage
capacity of 500,000 acre-feet or more, or a maximum storage capacity of
2,500,000 acre-feet or more (290 dams).
Location https://purl.stanford.edu/vz228tt5490

Access conditions

Use and reproduction
This item is in the public domain. There are no restrictions on use.
Copyright
This work is in the Public Domain, meaning that it is not subject to copyright.

Preferred citation

United States. Department of Transportation. Research and Innovative Technology Administration. (2014). Major Dams: United States and Territories, 2006. National Transportation Atlas Database 2014. Available at: http://purl.stanford.edu/vz228tt5490.

Collection

National transportation atlas databases : NTAD

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