As needed Spatial Extent of Data Minnesota and the portions of the Minnesota River Basin in South Dakota and Iowa. Watershed file from DNR Core GIS library is named BAS95NE3. This file represents the same set of boundaries, nationwide, but created at a smaller scale. USGS Circular 878-A. Codes for the identification of Hydrologic Units in the United States and the Caribbean Outlying Areas. Completeness Entire state is covered.
All polygons contain attribution.
DNR Major Watershed corresponds to 8-digit USGS HUC code. These two agencies merged into the DNR file updated watershed delineations they had performed in the 13 South-Central Minnesota counties and the Minnesota River Basin, respectively. Differences in delineations at the minor watershed level can affect these larger-area delineations if they occur on a boundary. A major change in the 1995 version of the file is that it incorporates the portions of the Minnesota River basin flowing through Iowa and South Dakota. Although extensive effort has been made to produce error free and complete data, all geographic information has limitations due to the scale, resolution, date and interpretation of the original source materials.