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National Inventory of Dams (NID)
Congress first authorized the U.S. Army Corps of Engineers (USACE) to inventory dams in the United States with the National Dam Inspection Act (Public Law 92-367) of 1972. The... -
National Levee Database
Congressionally mandated national levee safety dataset for the nations levees. Includes over 20 geospatial features and hundreds of business attributes. -
Inland Electronic Navigational Charts (IENC) NGDA
These Inland Electronic Navigational Charts (IENCs) were developed from available data used in maintenance of Navigation channels. Users of these IENCs should be aware that some...