National Levee Database

National Levee Database This feature layer, utilizing National Geospatial Data Asset (NGDA) data from the U.S. Army Corps of Engineers (USACE), displays levees within the United States. Per USACE, “The National Levee Database captures all known levees in the United States. It provides users with the ability to search for specific data about levees and serves as a national resource to support awareness and preparedness around flooding. The USACE is responsible for maintaining the National Levee Database and works in partnership with the Federal Emergency Management Agency (FEMA), and in close collaboration with other federal, state, and local governments and entities responsible for levees to obtain and share accurate and complete information.” Leveed area in Morrisville, Pennsylvania Data downloaded: 9/22/2025 Data source: NLD/Public NGDAID: 161 (National Levee Database) OGC API Features Link: (National Levee Database - OGC Features) copy this link to embed it in OGC Compliant viewers For more information, please visit: National Levee Database Support documentation: NLD Data Dictionary For feedback please contact: [e-mail] NGDA Data Set This data set is part of the NGDA Water - Inland Theme Community. Per the Federal Geospatial Data Committee (FGDC), Water - Inland is defined as the “interior hydrologic features and characteristics, including classification, measurements, location, and extent. Includes aquifers, watersheds, wetlands, navigation, water quality, water quantity, and groundwater information.” For other NGDA Content: Esri Federal Datasets