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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 surface water drainage system. NHD data was originally developed at 1:100,000-scale and exists at that scale for the whole country. This high-resolution NHD, generally developed at 1:24,000/1:12,000 scale, adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 scale.) Local resolution NHD is being developed where partners and data exist. The NHD contains reach codes for networked features, flow direction, names, and centerline representations for areal water...
Tags: Adams, Administrative watershed units, Administrative watershed units, Albany, Arapahoe, All tags...
Rainfall on 9–13 September 2013 triggered at least 1,138 debris flows in a 3430 km 2 area of the Colorado Front Range. Most flows were triggered in response to two intense rainfall periods, one 12.5-hour-long period on 11–12 September, and one 8-hour-long period on 12 September. Data in this project pertain to an area bounded by N 40.0° – 40.375° and W 105.25° – 105.625° which includes many of the areas where high concentrations of debris flows occurred. These data include a subset of a map of landslide and debris flow scarps (Coe and others, 2014) and raster grids derived from the National Elevation Dataset. These data were used to test a new, parallel implementation of the Transient Rainfall Infiltration and...
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Layered GeoPDF 7.5 Minute Quadrangle Map. Layers of geospatial data include orthoimagery, roads, grids, geographic names, elevation contours, hydrography, and other selected map features.
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Layered GeoPDF 7.5 Minute Quadrangle Map. Layers of geospatial data include orthoimagery, roads, grids, geographic names, elevation contours, hydrography, and other selected map features.
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Layered GeoPDF 7.5 Minute Quadrangle Map. Layers of geospatial data include orthoimagery, roads, grids, geographic names, elevation contours, hydrography, and other selected map features.
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The Watershed Boundary Dataset (WBD) is a comprehensive aggregated collection of hydrologic unit data consistent with the national criteria for delineation and resolution. It defines the areal extent of surface water drainage to a point except in coastal or lake front areas where there could be multiple outlets as stated by the "Federal Standards and Procedures for the National Watershed Boundary Dataset (WBD)" "Standard" (https://pubs.usgs.gov/tm/11/a3/). Watershed boundaries are determined solely upon science-based hydrologic principles, not favoring any administrative boundaries or special projects, nor particular program or agency. This dataset represents the hydrologic unit boundaries to the 12-digit (6th level)...
Tags: 10-digit, 12-digit, 14-digit, 16-digit, 2-digit, All tags...
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These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. The U.S. Geological Survey developed this dataset as part of the Colorado Front Range Infrastructure Resources Project (FRIRP). One goal of the FRIRP was to provide information on the availability of those hydrogeologic resources that are either critical to maintaining infrastructure along the northern Front Range or that may become less available because of urban expansion in the northern Front Range. This dataset extends from the...
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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 surface water drainage system. NHD data was originally developed at 1:100,000-scale and exists at that scale for the whole country. This high-resolution NHD, generally developed at 1:24,000/1:12,000 scale, adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 scale.) Local resolution NHD is being developed where partners and data exist. The NHD contains reach codes for networked features, flow direction, names, and centerline representations for areal water...
Tags: Adams, Administrative watershed units, Administrative watershed units, Arapahoe, Area of Complex Channels, All tags...
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The Watershed Boundary Dataset (WBD) is a comprehensive aggregated collection of hydrologic unit data consistent with the national criteria for delineation and resolution. It defines the areal extent of surface water drainage to a point except in coastal or lake front areas where there could be multiple outlets as stated by the "Federal Standards and Procedures for the National Watershed Boundary Dataset (WBD)" "Standard" (https://pubs.usgs.gov/tm/11/a3/). Watershed boundaries are determined solely upon science-based hydrologic principles, not favoring any administrative boundaries or special projects, nor particular program or agency. This dataset represents the hydrologic unit boundaries to the 12-digit (6th level)...
Tags: 10-digit, 12-digit, 14-digit, 16-digit, 2-digit, All tags...


map background search result map search result map USGS Watershed Boundary Dataset (WBD) for 2-digit Hydrologic Unit - 10 (published 20230726) FileGDB USGS Watershed Boundary Dataset (WBD) for 2-digit Hydrologic Unit - 14 (published 20231207) Shapefile USGS 1:62500-scale Quadrangle for Boulder, MT 1954 USGS 1:62500-scale Quadrangle for Boulder, MT 1954 USGS 1:125000-scale Quadrangle for Boulder, MT 1899 USGS 1:62500-scale Quadrangle for Boulder, CO 1904 USGS 1:62500-scale Quadrangle for Boulder, MT 1954 USGS US Topo 7.5-minute map for Carter Lake Reservoir, CO 2016 USGS US Topo 7.5-minute map for Eldorado Springs, CO 2013 USGS US Topo 7.5-minute map for Gold Hill, CO 2016 USGS US Topo 7.5-minute map for Lafayette, CO 2016 USGS US Topo 7.5-minute map for Longmont, CO 2016 USGS US Topo 7.5-minute map for Nederland, CO 2016 USGS US Topo 7.5-minute map for Niwot, CO 2010 USGS US Topo 7.5-minute map for Panorama Peak, CO 2011 USGS US Topo 7.5-minute map for Tungsten, CO 2011 Digital geospatial datasets in support of hydrologic investigations of the Colorado Front Range Infrastructure Resources Project USGS National Hydrography Dataset Best Resolution (NHD) for Hydrological Unit (HU) 4 - 1019 (published 20231125) GeoPackage USGS National Hydrography Dataset Best Resolution (NHD) for Hydrological Unit (HU) 8 - 10190003 (published 20231217) GeoPackage USGS US Topo 7.5-minute map for Carter Lake Reservoir, CO 2016 USGS US Topo 7.5-minute map for Eldorado Springs, CO 2013 USGS US Topo 7.5-minute map for Gold Hill, CO 2016 USGS US Topo 7.5-minute map for Lafayette, CO 2016 USGS US Topo 7.5-minute map for Longmont, CO 2016 USGS US Topo 7.5-minute map for Nederland, CO 2016 USGS US Topo 7.5-minute map for Niwot, CO 2010 USGS US Topo 7.5-minute map for Panorama Peak, CO 2011 USGS US Topo 7.5-minute map for Tungsten, CO 2011 USGS 1:62500-scale Quadrangle for Boulder, MT 1954 USGS 1:62500-scale Quadrangle for Boulder, MT 1954 USGS 1:62500-scale Quadrangle for Boulder, CO 1904 USGS 1:62500-scale Quadrangle for Boulder, MT 1954 USGS 1:125000-scale Quadrangle for Boulder, MT 1899 Digital geospatial datasets in support of hydrologic investigations of the Colorado Front Range Infrastructure Resources Project USGS National Hydrography Dataset Best Resolution (NHD) for Hydrological Unit (HU) 8 - 10190003 (published 20231217) GeoPackage USGS National Hydrography Dataset Best Resolution (NHD) for Hydrological Unit (HU) 4 - 1019 (published 20231125) GeoPackage USGS Watershed Boundary Dataset (WBD) for 2-digit Hydrologic Unit - 14 (published 20231207) Shapefile USGS Watershed Boundary Dataset (WBD) for 2-digit Hydrologic Unit - 10 (published 20230726) FileGDB