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  • Dams (National)

    Metadata Updated: November 13, 2020

    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, 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.

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Date November 8, 2016
    Metadata Created Date November 10, 2020
    Metadata Updated Date November 13, 2020
    Reference Date(s) January 1, 2016 (publication)
    Frequency Of Update

    Metadata Source

    Harvested from National Transportation Atlas Database (NTAD) Metadata

    Additional Metadata

    Resource Type Dataset
    Metadata Date November 8, 2016
    Metadata Created Date November 10, 2020
    Metadata Updated Date November 13, 2020
    Reference Date(s) January 1, 2016 (publication)
    Responsible Party Office of the Assistant Secretary for Research and Technology/Bureau of Transportation Statistics (Point of Contact); National Atlas of the United States (Point of Contact)
    Contact Email
    Guid
    Access Constraints Use Constraints: None, Access Constraints: None
    Bbox East Long -66.014998
    Bbox North Lat 68.069399
    Bbox South Lat 18.017303
    Bbox West Long -162.877839
    Coupled Resource
    Frequency Of Update
    Licence See access and use constraints information. See access and use constraints information.
    Metadata Language eng; USA
    Metadata Type geospatial
    Progress
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True

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