EPA Office of Water (OW): NHDPlus v21+AK Beta Catchment Fabric Twelve-Digit Subwatersheds
This dataset contains twelve-digit hydrologic subwatershed units aggregated from the NHDPlus v21+AK Beta State Catchment Fabric. These units express the Catchment Crosswalk logic used to assign NHDPlus catchments to HUC12 units and are not representative of the Watershed Boundary Dataset or other hydrologic unit …