This digital geospatial data set consists of potentiometric contours that show lines of equal altitude of the generalized, long-term, regional water table in the northern part of Las Animas County, Colorado. The U.S. Geological Survey developed this data set as part of a cooperative project with the Colorado Water Conservation Board.

This digital geospatial data set consists of potentiometric contours that show lines of equal altitude of the generalized, long-term, regional water table in the northern part of Las Animas County, Colorado. The U.S. Geological Survey developed this data set as part of a cooperative project with the Colorado Water Conservation Board.

This digital geospatial data set consists of potentiometric contours that show lines of equal altitude of the generalized, long-term, regional water table in the northern part of Las Animas County, Colorado. The U.S. Geological Survey developed this data set as part of a cooperative project with the Colorado Water Conservation Board.

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 Boulder-Jefferson County line on the south, to the middle of Larimer and Weld Counties on the North. On the west, this dataset is bounded by the approximate mountain front of the Front Range of the Rocky Mountains; on the east, by an arbitrary north-south line extending through a point about 6.5 kilometers east of Greeley. This digital geospatial dataset consists of depth-to-water (unsaturated-thickness) contours that were generated from hydrogeologic data with Geographic Information System (GIS) software.

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 Boulder-Jefferson County line on the south, to the middle of Larimer and Weld Counties on the North. On the west, this dataset is bounded by the approximate mountain front of the Front Range of the Rocky Mountains; on the east, by an arbitrary north-south line extending through a point about 6.5 kilometers east of Greeley. This digital geospatial dataset consists of bedrock-outcrop outlines from hand-drawn maps.

The U.S. Geological Survey (USGS), in cooperation with the Utah Department of Environmental Quality has developed a geographic database of selected ground-water-level altitude contours and surfaces for Utah. The contour data are derived from studies published by the USGS and the State of Utah. The published contours were converted to digital format and attributes documenting information such as the water-level altitude, the year the study report was published, the year for which the contours were drawn, and a link to the on-line version of the study report were added to the data set. The contours were input to the database as a unique polyline feature class for each study area. The digital contours were passed through an inverse distance weighted algorithm to develop a continuous interpolated water-level altitude surface in raster format. The water-level altitude surface was subtracted from USGS National Elevation data to derive a second raster of the estimated depth-to-ground-water surface for each study. Comparison of the derived water-level altitude surface to water-level measurements from the USGS National Water Information System (NWIS) database shows calculated values from the water-level altitude rasters are generally well correlated with measured values from NWIS. The database is not intended to result in exact predictions of the ground-water altitude or depth to ground water for any location but can be used as a general guide to aid the management and protection of ground-water resources in Utah.

The U.S. Geological Survey (USGS), in cooperation with the Utah Department of Environmental Quality has developed a geographic database of selected ground-water-level altitude contours and surfaces for Utah. The contour data are derived from studies published by the USGS and the State of Utah. The published contours were converted to digital format and attributes documenting information such as the water-level altitude, the year the study report was published, the year for which the contours were drawn, and a link to the on-line version of the study report were added to the data set. The contours were input to the database as a unique polyline feature class for each study area. The digital contours were passed through an inverse distance weighted algorithm to develop a continuous interpolated water-level altitude surface in raster format. The water-level altitude surface was subtracted from USGS National Elevation data to derive a second raster of the estimated depth-to-ground-water surface for each study. Comparison of the derived water-level altitude surface to water-level measurements from the USGS National Water Information System (NWIS) database shows calculated values from the water-level altitude rasters are generally well correlated with measured values from NWIS. The database is not intended to result in exact predictions of the ground-water altitude or depth to ground water for any location but can be used as a general guide to aid the management and protection of ground-water resources in Utah.

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 Boulder-Jefferson County line on the south, to the middle of Larimer and Weld Counties on the North. On the west, this dataset is bounded by the approximate mountain front of the Front Range of the Rocky Mountains; on the east, by an arbitrary north-south line extending through a point about 6.5 kilometers east of Greeley. This digital geospatial dataset consists of saturated-thickness polygons that were generated with a Geographic Information System (GIS).

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 Boulder-Jefferson County line on the south, to the middle of Larimer and Weld Counties on the North. On the west, this dataset is bounded by the approximate mountain front of the Front Range of the Rocky Mountains; on the east, by an arbitrary north-south line extending through a point about 6.5 kilometers east of Greeley. This digital geospatial dataset consists of digitized water-level-elevation contours.

These data are in support of report DS 456 (Arnold and others, 2009). This grid represents the depth to groundwater in the High Plains Aquifer in Colorado in 2000. The depth-to-water grid was generated for the entire High Plains Aquifer from depth-to-water measurements collected in 2000. Shown as figure 12 in McMahon and others (2007).