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Federal
National Hydrography Dataset (NHD) - USGS National Map Downloadable Data Collection NGDA 78 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
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... -
State
Iowa Watershed Boundaries: Subbasins (HUC 08)
State of Iowa —
The Watershed Boundary Dataset (WBD) defines the areal extent of surface water drainage to a point, accounting for all land and surface areas. Watershed Boundaries... -
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... -
State
Iowa Watershed Boundaries: Subwatersheds (HUC 12)
State of Iowa —
The Watershed Boundary Dataset (WBD) defines the areal extent of surface water drainage to a point, accounting for all land and surface areas. Watershed Boundaries... -
State
Iowa Watershed Boundaries: Watersheds (HUC 10)
State of Iowa —
The Watershed Boundary Dataset (WBD) defines the areal extent of surface water drainage to a point, accounting for all land and surface areas. Watershed Boundaries... -
Federal
Digital Hydrologic Cataloging-Unit Boundaries for the Powder River, Wyoming, at 1:24,000 Scale
Department of the Interior —
This data set contains hydrologic cataloging-unit boundaries for selected units within the Powder River drainage basin of Wyoming. The hydrologic unit boundaries were... -
Federal
National Stream Quality Accounting Network and National Monitoring Network Basin Boundary Geospatial Dataset, 2008-13
Department of the Interior —
This dataset and the accompanying Data Series report was created to assist in analysis and interpretation of water-quality data provided by the U.S. Geological... -
Federal
Estimated Water Use by Select Subbasin and State (HUC8/State) in the Pee Dee, Cape Fear, and Neuse-Pamlico River Basins; 2000, 2005, 2010, and 2015
Department of the Interior —
The coastal region which includes areas within South Carolina and North Carolina was chosen as a focus area study (FAS) for the U.S. Geological Survey (USGS) National... -
Federal
1:2,000,000-scale Hydrologic Units of the United States (SUPERSEDED)
Department of the Interior —
This file contains hydrologic unit boundaries and codes for the conterminous United States along with Alaska, Hawaii, Puerto Rico and the U.S. Virgin Islands. It was... -
Federal
1:2,000,000-scale Hydrologic Units of the United States (OLDER)
Department of the Interior —
This data set has been superseded by huc2m. This file contains hydrologic unit boundaries and codes for the conterminous United States along with Alaska, Hawaii,...