Hydric soils indicate a current or former wetland condition, and for this layer, hydric inclusions (>15% hydric soils) were not added to the layer, while hydric complexes (<15% hydric soils) were included. This is a statewide layer that can be used as one resource in identifying current or former wetland areas.United States Department of Agriculture-National Resource Conservation Service(USDA-NRCS)Soil Survey Geographic database(SSURGO) Soils were used as the base dataset and hydric soil types were queried out on a county by county basis in a GIS environment. USDA-NRCS State Soil Scientists provided the hydric soil types in Excel table format by county, and Wetlands, Lakes, and Streams unit (WLSU) produced this layer from that official list.
Michigan Dept. of Environment, Great Lakes, and Energy