Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This watershed boundary feature class has been assembled to support agricultural conservation planning. The original data used to create this database are the Watershed Boundary Dataset (WBD) for the three individual states. The majority of the metadata found herein pertains to the Watershed Boundary Dataset (WBD) and has been modified only to reflect the repurposing of the data in its aggregated form. Watershed boundaries are updated annually to match boundaries supplied by the WBD in the first quarter of the update year.</SPAN></P><P><SPAN>This data set is a complete digital hydrologic unit boundary layer to the Subwatershed (12-digit) 6th level for the entire United States. This data set consists of geo-referenced digital data and associated attributes created in accordance with the "Federal Guidelines, Requirements, and Procedures for the National Watershed Boundary Dataset; Chapter 3 of Section A, Federal Standards, Book 11, Collection and Delineation of Spatial Data; Techniques and Methods 11-A3" (04/01/2009). http://www.ncgc.nrcs.usda.gov/products/datasets/watershed/index.html . Polygons are attributed with hydrologic unit codes for 4th level sub-basins, 5th level watersheds, 6th level subwatersheds, name, size, downstream hydrologic unit, type of watershed, non-contributing areas and flow modification.</SPAN></P></DIV></DIV></DIV>
Service Item Id: d21d6b34c2f84ec081e9ea4bf19cf436
Copyright Text: Funding and support for the Watershed Boundary Dataset (WBD) were provided by the Natural Resources Conservation Service, the Environmental Protection Agency, and the United States Geological Survey. Representatives from the U.S. Geological Survey and Environmental Protection Agency contributed a substantial amount of time and salary towards quality review and updating of the dataset in order to meet the Federal Standards for Delineation of Hydrologic Unit Boundaries.