National Levee DatabaseThis 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, PennsylvaniaData downloaded: 4/24/2024Data source: NLD 2 PublicNGDAID: 161 (National Levee Database)OGC API Features Link: (National Levee Database - OGC Features) copy this link to embed it in OGC Compliant viewersFor more information, please visit: National Levee DatabaseSupport documentation: NLD Data DictionaryFor feedback please contact: Esri_US_Federal_Data@esri.comNGDA Data SetThis 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

The National Levee Database is a Congressionally authorized database that documents levees in the United States. The NLD is maintained and published by the U.S. Army Corps of Engineers (USACE).The NLD contains information about the condition and risk information for approximately 2,000 levee systems (approximately 15,000 miles/mostly levees affiliated with USACE programs. An additional 6,000 levee systems--approximately 15,000 miles--have location information, but little to no information about condition and risk. One of the goals for the NLD is to include data about levees owned and operated by all other federal agencies, tribes, states, municipalities, levee boards, and private entities. This information will be added as it becomes available. United State Army Corps of Engineers NLD mission statement.The full NLD as an AGOL Feature Layer.

Congressionally mandated national levee safety dataset for the nations levees. Includes over 20 geospatial features and hundreds of business attributes.

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 U.S. Army Corps of Engineers (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.Key data available includes the location of levees, people and assets behind the levee, responsible entity, and other information. Since publishing the National Levee Database in 2011, efforts have been made to improve the accuracy of available data and add new information for additional levees in partnership with those who own, operate, or provide oversight to levees.

This link provides information and additional metadata related to the US Army Corps of Engineers National Levee Database.

The National Levee Database is a dynamic, searchable inventory of information about levees, and a key resource supporting decisions and actions affecting levee safety. Â It provides information about the location and condition of levees and floodwalls, displayed in an easy-to-use map interface, as well as reports, inspection summaries, and other records. Â It includes detailed information about the levees in the Levee Safety Program, as well as a growing library of available information on levees outside of the USACE program.

The National Levee Database is authoritative database that describes the location and condition of the Nationâ s levees. The database contains 21 feature classes and associated levee business tables in a relational geodatabase. The spatial accuracy of the data is of mixed quality documented in each feature class. The levee data is available for the United States at the website at nld.usace.army.mil.

When visiting the page, a user can get a web service of the data by selecting WEB-GIS SERVICE from the MORE dropdown. This provides the link (https://levees.sec.usace.army.mil/mapserver/public/ows) to the web service. Information on how to access this service is included here: http://usace-cwbi-prod-nld2-docs.s3.amazonaws.com/downloads/NLD_Web_GIS_Service_User_Guide.pdf.

Though levees are a widely used flood mitigation infrastructure in the United States, levees displace inundation, shifting flood risk to nearby areas with substantial environmental and social justice implications. To support research on whole-channel hydraulic and morphologic shifts associated with levee construction, this dataset defines the upstream, downstream, cross-stream, and leveed hydraulic reach of 60 levees constructed between 1995 and 2005 in the USACE National Levee Database 2 ("NLD2", https://ags03.sec.usace.army.mil/server/rest/services/NLD2_PUBLIC/FeatureServer).

Each shapefile is named using the "Levee ID" in the NLD2. Each shapefile contains 4-8 polygons corresponding with different hydraulic reaches (upstream, downstream, adjacent, protected/leveed), with multiple hydraulic reaches of the same class indicating a multi-channel levee. The attribute "Polygon" in each shapefile contains a letter indicating the class of hydraulic reach. 1.P--Protected: the land surface area between the channel center and extended floodplain. The levee was constructed to reduce flood risk in this area. 2. A--Adjacent: the land surface area on the same side of the levee as the affected water body, or across the channel from the water body. 3. S--Setback: a design feature used to reduce along-channel flooding. The land surface area between the levee and channel; the NLD will detail whether or not a setback has been included in design. 4/5. U/D-- Upstream/Downstream: this is the land surface area within the affected channel floodplain and within the upstream and downstream hydraulic reach of the structure where there may be hydraulic impacts (alterations in the discharge/inundation relationship) with levee construction.

This is a dataset download, not a document. The Open button will start the download.The levee lines feature class is an inventory of levee lines representing the centerline of levee-like features that appear to protect against flooding in the state of Oregon. It is a compilation of levee datasets from the following sources: The Oregon Department of Geology and Mineral Industries (2017), The U.S. Army Corps of Engineers (2015), The Lower Columbia River Partnership (2012) and The Oregon Coastal Monitoring Program (2011). A geospatial inventory of levees and levee-like features is an important resource for assessing flood risk, flood mitigation planning and for emergency response during flood events. It also benefits ecological restoration efforts by helping locate levees to remove or breach in order to expand habitat for aquatic species. Until now, the state of Oregon did not have a single comprehensive inventory that maps levees with the high spatial accuracy needed to support these activities. To meet this need, the Oregon Department of Geology and Mineral Industries (DOGAMI) created new levee data and compiled pre-existing levee data into a single geospatial inventory.

These topographic data were collected for the U.S. Army Corps of Engineers by a helicopter-mounted LiDAR sensor over the New Orleans Hurricane Protection Levee System in Louisiana.

The California Department of Water Resources (DWR) and U.S. Army Corps of Engineers (USACE), Sacramento District are jointly planning to undertake the construction of the Lower Elkhorn Basin Levee Setback project in Yolo County, California, the US.The project involves the construction of 11.2km of setback levees, existing leeves removal, utility removal, vegetation removal, and clearing, Widening the Sacramento Bypass by constructing a setback levee approximately 1,500 feet north of the existing levee, Widening the Sacramento Bypass by constructing a setback levee approximately 1,500 feet north of the existing levee, remove portions of local reclamation district cross levees, grading existing roads, installation of relief wells and associated conduit connections, improve or relocate related infrastructure.On September 7, 2016, the notice of intent (NoI) was publically released for a Joint Environmental Impact Statement/Environmental Impact Report (EIS/EIR).On September 15, 2016, USACE, Sacramento District and DWR held a joint public scoping meeting. GEI Consultants, Inc. (GEI) was appointed as the consultant for the project to prepare Environmental Impact Report(EIR).In May 2018, the Draft Environmental Impact Statement/Draft Environmental Impact Report (DEIS/DEIR) has beenprepared by USACE and DWR.On May 25, 2018, the public comment period for the DEIS/DEIR was commenced and completed on July 9, 2018.Design works are underway and the final EIS is expected in the fourth quarter of 2018 and construction works are expected to commence in 2020. Read More

The data contained in this dataset is a synthesis of existing information on levees in the State of Washington. The shapefiles displayed attempt to depict levee centerlines as accurately as possible. Primary data sources include the U.S. Army Corps of Engineers and the Federal Emergency Management Agency, In addition to these sources, inputs from local levee managers were used to augment the aforementioned sources.

This feature class is a compilation of levee and revetment data based on GPS data and heads-up digitizing, acquired by the US Army Corps of Engineers and Pierce County Surface Water Management division. Please read metadata for additional information (https://matterhorn.piercecountywa.gov/GISMetadata/pdbswm_levees_and_revetments.html). Any use or data download constitutes acceptance of the Terms of Use (https://matterhorn.piercecountywa.gov/disclaimer/PierceCountyGISDataTermsofUse.pdf).

The data contained in this dataset is a synthesis of existing information on levees in the State of Washingon. The shapefiles displayed attempt to depict levee centerlines as accurately as possible. Primary data sources include the U.S. Army Corps of Engineers and the Federal Emergency Management Agency, In addition to these sources, inputs from local levee managers were used to augment the aforementioned sources.

Homeland Infrastructure Foundation-Level Data (HIFLD) geospatial data sets containing information on Levee Lines (USACE IENC).

A natural or man-made flow (or sediment) control structure in a water course or water body such as a dike or weir. This feature should not be used to model a levee. GIS database of the wing dam/closing dam attributes for those structures constructed along the nine-foot navigation channel of the Mississippi River (river miles 840.1 to 615.2). Wing dams are rock and brush structures extending from the bank toward the navigation channel to concentrate flow in the navigation channel. Closing dams are rock and brush structures extending across secondary channels to concentrate flow in the main channel. Many closing dams are located at the upriver entrance to secondary channels, while others are located farther downriver within secondary channels.

File named "Bois Brule" is just one example of the levee information files from USACE database.

The data contained in this dataset is an aggregation and synthesis of existing information on levees in the Puget Sound, Washington state. This is an updated version from the 2023 version which now includes standardized attribute fields with domains. The feature class displayed attempt to depict levee centerlines and edge of levee lines as accurately as possible. Primary data sources include the U.S. Army Corps of Engineers and the Washington State Department of Ecology along with inputs from local jurisdictions, institutions and tribal sources.The purpose of this dataset is to provide a comprehensive view of the location, and when available, conditions, of levees at the Puget Sound level. Future work will seek to create a comprehensive Statewide levee dataset.Data was derived from disparate sources such as the U.S. Army Corps of Engineer, Washington State Department of Ecology, and numerous local jurisdictions and Tribes. Due to the varied nature of these disparate sources, a wide array of attributes have been synthesized into the current dataset. The equivalent information/attributes were not always available between data sources. Thus, not all levees display information for all attributes.Original and this refined geodatabase in Washington State Plane Harn NAD 83 and metadata: https://pspwa.box.com/s/9imik3v43c81lf0lbjzjcc1y0rfpv11s