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Federal
National Hydrography Dataset (NHD) - USGS National Map Downloadable Data Collection NGDA 98 recent views
Department of the Interior —
The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's... -
Federal
Watershed Boundary Dataset (WBD) - USGS National Map Downloadable Data Collection NGDA 45 recent views
Department of the Interior —
The Watershed Boundary Dataset (WBD) is a comprehensive aggregated collection of hydrologic unit data consistent with the national criteria for delineation and... -
Federal
National Hydrography Dataset Plus High Resolution (NHDPlus HR) - USGS National Map Downloadable Data Collection
Department of the Interior —
The High Resolution National Hydrography Dataset Plus (NHDPlus HR) is an integrated datset of geospatial data layers, including the most current National Hydrography... -
Federal
USGS Watershed Boundary Dataset (WBD) Stewardship Plan Objectives for FY20 from The National Map - National Geospatial Data Asset (NGDA) Watershed Boundary Dataset (WBD) NGDA
U.S. Geological Survey, Department of the Interior —
U.S. Geological Survey, Department of the Interior - The annual Watershed Boundary Dataset (WBD) stewardship plan is to maintain watershed boundary data through usage... -
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
Regions for regional regression equations
Department of the Interior —
Regional regression equations were calculated in Puerto Rico with generalized least squares techniques to estimate flood frequency statistics at ungaged locations... -
State
Watershed Boundary Dataset (WBD)
State of California —
The Watershed Boundary Dataset (WBD) from The National Map (TNM) defines the perimeter of drainage areas formed by the terrain and other landscape characteristics.... -
State
River Management Engineer Districts
Vermont Center for Geographic Information —
The following link provides access to VT specific metadata created by the agencies that did the delineation. Disregard the Spatial Reference information in these... -
Federal
EnviroAtlas - HU12_polygon
U.S. Environmental Protection Agency —
This data set is a complete digital hydrologic unit boundary layer to the Subwatershed (12-digit) 6th level for the entire United States. This data set consists of...