Dams eng; USA 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646 information applies to the dataset Rebecca Ragon United States Army Corp of Engineers (USACE) National Inventory of Dams Manager 441 G Street NW Washington DC 20314 United States nid@usace.army.mil party who can be contacted for acquiring knowledge about or acquisition of the resource 2026-02-02 ISO 19139 Geographic Information - Metadata ISO/TS 19139:2007 point 16196 3857 EPSG Dams 2013-07-01 date identifies when the resource was brought into existence 2026-02-02 date identifies when the resource was examined or re-examined and imporved or amended United States Army Corp of Engineers (USACE) party who created the resource map represented in raster or vector form The Dams dataset is a representation of the National Inventory of Dams (NID), maintained and published by the U.S. Army Corps of Engineers, in cooperation with the Association of State Dam Safety Officials, the states, territories, and federal agencies. It is also part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics (BTS) National Transportation Atlas Database (NTAD). The Dams dataset (NID) includes all known dams of the United States and its territories, that meet the federal definition of a dam. Dams where downstream flooding would likely result in loss of human life (high hazard potential). Dams where downstream flooding would likely result in disruption of access to critical facilities, damage to public and private facilities, and require difficult mitigation efforts (significant hazard potential). Dams that meet minimum height and reservoir size requirements, even though they do not pose the same level of life or economic risk as those above - these low hazard potential dams equal or exceed 25 feet in height and exceed 15 acre-feet in storage, or equal or exceed 50 acre-feet storage and exceed 6 feet in height. The database contains more than 70 data fields for each dam. This includes the dam's location, size, purpose, type, last inspection, and regulatory facts. The information is updated periodically by the state and federal agencies, reflected by the "Data Last Updated Date". For more information on dams, visit the NID web site at https://nid.sec.usace.army.mil/#. A data dictionary, or other source of attribute information, is accessible at https://doi.org/10.21949/1529016 The National Inventory of Dams documents more than 90,000 dams in the U.S. and its territories. It serves as a national resource to support awareness of dams. Acknowledgment of the U.S. Army Corps of Engineers (USACE) https://nid.sec.usace.army.mil/# and the Bureau of Transportation Statistics (BTS) [distributor]. data is continually being updated Rebecca Ragon United States Army Corp of Engineers (USACE) National Inventory of Dams Manager 441 G Street NW Washington DC 20314 United States nid@usace.army.mil party who can be contacted for acquiring knowledge about or acquisition of the resource data is updated on a weekly basis NTAD National Transportation Atlas Database National Transportation Atlas Database vector point Marine Maritime Transportation Infrastructure Inland Waters Structure USACE Water Structures Dams Waterway Inland Hydrography Reservoir keyword identifies a particular subject or topic none USA National keyword identifies a location none This NTAD dataset is a work of the United States government as defined in 17 U.S.C. § 101 and as such are not protected by any U.S. copyrights. This work is available for unrestricted public use. limitation not listed Access Constraints: unrestricted National Transportation Atlas Database 2026-02-02 publication Bureau of Transportation Statistics (BTS) party who published the resource reference to a master dataset of which this one is a part vector data is used to represent geographic data eng; USA inlandWaters Native Dataset Environment: Version 6.2 (Build 9200) ; Esri ArcGIS 10.8.1.14362 -176.6418 -66.10111 18.06861 64.88 2026-01-30 1 Dams A data dictionary resource of attribute information is accessible at https://doi.org/10.21949/1529016 Open Data Catalog 1.0 ArcGIS REST Services Directory Feature Server (WFS) 11.5 Bureau of Transportation Statistics (BTS) NTAD Program Manager 1200 New Jersey Ave. SE Washington DC 20590 United States ntad@dot.gov party who distributes the resource None. No fees are applicable for obtaining the dataset. https://doi.org/10.21949/1522042 http Open Data Catalog Web page to view and download dataset. The file download formats available include: ESRI File Geodatabase or Shapefile, GeoPackage, Comma-Seperated Values (CSV), Microsoft Excel, GeoJSON, KML, Feature Collection, and SQLite Geodatabase. online instructions for transferring data from one storage device or system to another https://doi.org/10.21949/1522044 http ArcGIS REST Services Directory Feature Server (WFS) complies with OGC WFS Map Service for visualizing geospatial information online instructions for transferring data from one storage device or system to another information applies to the dataset Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. The U.S. Army Corps of Engineers (USACE) closely collaborates with federal and state dam regulating agencies to obtain accurate and complete information about dams in the database. With the Nov 2021 release of the new NID web site, state and federal regulatory agencies can update their NID information at any time. However, providing updates to the NID is a voluntary action. Some agencies may update their information more frequently while others may update annually. Within the NID, there is a “Data Last Updated” date that reflects when an agency updated information for that specific dam. data is updated as deemed necessary Rebecca Ragon United States Army Corp of Engineers (USACE) National Inventory of Dams Manager 441 G Street NW Washington DC 20314 United States nid@usace.army.mil party that accepts accountability and responsability for the data and ensures appropriate care and maintenance of the resource