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Federal
Watershed Boundary Dataset; 12-Digit Watersheds Dissolved to 8-Digit Watersheds
Department of the Interior —
This dataset is the digital hydrologic unit boundary layer for the 8-digit subwatershed boundaries for the conterminous United States. This dataset is intended to be... -
Federal
Environmental Settings Protocol - Landscape Dynamics HUC12 Areas of Analysis (AOAs) (2018)
Department of the Interior —
Dataset containing HUC12 watershed boundaries that are within or intersect the boundary of a standard park AOA. The Watershed Boundary Dataset (WBD) is a...