In order to access the habitat and reach level GIS data for your area of
interest, click on the Hydrologic Unit (HUC) area on the map, or find the HUC
number in the table below. There are two GIS coverages for each
files exported from ArcInfo). These two coverages have been
zipped together for ease of transfer. More information about file formats
as well as access to free unzip and GIS programs is available through the file
format transfer information link below this map.