This digital geospatial data set consists of locations of coal, oil, gas and water wells shown as data points in the report, "Structure, Outcrop, and Subcrop of the Bedrock Aquifers Along the Western Margin of the Denver Basin, Colorado" (Robson and others, 1998).

This digital geospatial data set consists of outlines of the study area in the report "Structure, Outcrop, and Subcrop of the Bedrock Aquifers Along the Western Margin of the Denver Basin, Colorado" (Robson and others, 1998).

This data set is one of many developed in support of The High Plains Groundwater Availability Project and the U.S. Geological Survey Data Series report: titled Geodatabase Compilation of Hydrogeologic, Remote Sensing, and Water-Budget-Component data for the High Plains aquifer, 2011 (DS 777). This dataset contains point vector data of locations of 16,950 wells and 90,155 well log records located in areas overlying the northern High Plains aquifer in the United States. The northern High Plains aquifer underlies 61.7 million acres (96,400 square miles) in Colorado, Kansas, Nebraska, South Dakota, and Wyoming. These data were acquired from different sources and synthesized together in one dataset. Included in this dataset is a point feature class (pts_Depth2Bedrock) of elevation values and depth values to the base of the northern High Plains aquifer as well as geospatial coordinates, a table containing a digital version of well logs (tbl_LithologyAggregate) with detailed subsurface material, texture, and sorting.

This data set is one of many developed in support of The High Plains Groundwater Availability Project and the U.S. Geological Survey Data Series report: titled Geodatabase Compilation of Hydrogeologic, Remote Sensing, and Water-Budget-Component data for the High Plains aquifer, 2011 (DS 777). This dataset contains point vector data of locations of 16,950 wells and 90,155 well log records located in areas overlying the northern High Plains aquifer in the United States. The northern High Plains aquifer underlies 61.7 million acres (96,400 square miles) in Colorado, Kansas, Nebraska, South Dakota, and Wyoming. These data were acquired from different sources and synthesized together in one dataset. Included in this dataset is a point feature class (pts_Depth2Bedrock) of elevation values and depth values to the base of the northern High Plains aquifer as well as geospatial coordinates, a table containing a digital version of well logs (tbl_LithologyAggregate) with detailed subsurface material, texture, and sorting.

This data set is one of many developed in support of The High Plains Groundwater Availability Project and the U.S. Geological Survey Data Series Report: Geodatabase Compilation of Hydrogeologic, Water-Budget Component, and Remote Sensing data for the High Plains aquifer, 2011 (DS 777). This dataset contains point vector data of 8,149 wells with 8,149 water-level measurement records located in areas overlying the northern High Plains aquifer in the United States. These data were acquired from the U.S. Geological Survey, Groundwater Resources Program, High Plains, Water-Level Monitoring Study at the following URL: http://ne.water.usgs.gov/ogw/hpwlms/data.html

This data set is one of many developed in support of The High Plains Groundwater Availability Project and the U.S. Geological Survey Data Series Report: Geodatabase Compilation of Hydrogeologic, Water-Budget Component, and Remote Sensing data for the High Plains aquifer, 2011 (DS 777). This dataset contains point vector data of 8,149 wells with 8,149 water-level measurement records located in areas overlying the northern High Plains aquifer in the United States. These data were acquired from the U.S. Geological Survey, Groundwater Resources Program, High Plains, Water-Level Monitoring Study at the following URL: http://ne.water.usgs.gov/ogw/hpwlms/data.html

This digital geospatial data set consists of geohydrologic unit boundaries shown in the report "Structure, outcrop, and subcrop of the bedrock aquifers along the western margin of the Denver Basin, Colorado" (Robson and others, 1998).

This point dataset contains geologic information concerning regolith thickness and top-of-bedrock altitude at selected well and test-hole locations in and near the Lost Creek Designated Ground Water Basin, Weld, Adams, and Arapahoe Counties, Colorado. Data were compiled from published reports, consultant reports, and from lithologic logs of wells and test holes on file with the U.S. Geological Survey and the Colorado Division of Water Resources. The U.S. Geological Survey prepared this dataset in cooperation with the Colorado Geological Survey and the Lost Creek Ground Water Management District.

Federal onshore lands contain an estimated 20 percent of the oil and 25 percent of the undiscovered natural gas resources in the United States (U.S. Bureau of Land Management, 2006) and the BLM has identified the Upper Colorado River Basin (UCRB) as an area with high potential for continued energy development (U.S. Bureau of Land Management, 2002). The UCRB drains portions of Arizona, Colorado, New Mexico, Utah, and Wyoming and is part of the largest river basin in the southwestern United States. A significant volume of known and potential oil and gas reserves lies in the sedimentary basins of the UCRB (Huffman, 1995; U.S. Geological Survey 2002a; U.S. Geological Survey 2002b; U.S. Geological Survey 2002c) and an average of 4,527 wells per year was started on Federal land in the five UCRB states in fiscal years (FY, October 1 to September 30) 2006 and 2007 (U.S. Bureau of Land Management 2008). An average of 2,462 wells per year were drilled between FY 2000 and 2005. 1,284 wells were drilled per year on average in the preceding 10 year period from FY 1990 to 1999. Increased drilling activity has raised concerns that land disturbance from drilling activity may have an affect on surface water quality in the basin. Existing and planned land disturbance data are not regularly or consistently compiled at the state or regional level. Regional-scale compilation, synthesis, and analysis of data defining energy development- related land disturbance and water quality in the UCRB may help to improve understanding of the potential cumulative effects of current and projected energy development on land cover changes in the basin. The location of known oil and gas wells was compiled from state oil and gas databases and merged into a single oil and gas well dataset for the UCRB. The reported status of each well was used to classify the well into two categories: disturbed or not disturbed. Disturbed wells are likely associated with land disturbance. The classified wells were used to estimate the location and extent of energy related land disturbance in the basin. References: Huffman, A.C., Jr., 1995, Paradox Basin Province: U.S. Geological Survey 1995 National oil and gas assessments, accessed April 2009 at http://certmapper.cr.usgs.gov/data/noga95/prov21/text/prov21.pdf U.S. Bureau of Land Management, 2002, Resourceful management of our natural resources, accessed April 2009 at http://www.blm.gov/pgdata/etc/medialib/blm/wo/Communications_Directorate/general_publications/mgmt.Par.6587.File.dat/handout_02.pdf U.S. Bureau of Land Management, 2006, Scientific inventory of onshore federal lands' oil and gas resources and the extent and nature of restrictions or impediments to their development: Energy policy and conservation act phase II inventory, accessed October 2007 at http://www.blm.gov/epca/ U.S. Bureau of Land Management, 2008, Oil and Gas Statistics, accessed February 2009 at http://www.blm.gov/wo/st/en/info/newsroom/Energy_Facts_07/statistics.html U.S. Geological Survey, 2002a, Assessment of undiscovered oil and gas resources of the Uinta-Piceance Province of Colorado and Utah, 2002: U.S. Geological Survey Fact Sheet 026-02, accessed April 2009 at https://pubs.usgs.gov/fs/fs-0026-02/fs-0026-02.pdf U.S. Geological Survey, 2002b, Assessment of undiscovered oil and gas resources of the San Juan Basin Province of New Mexico and Colorado, 2002: U.S. Geological Survey Fact Sheet 147-02, accessed April 2009 at https://pubs.usgs.gov/fs/fs-147-02/FS-147-02.pdf U.S. Geological Survey, 2002c, Assessment of undiscovered oil and gas resources of the Southwestern Wyoming Province, 2002: U.S. Geological Survey Fact Sheet 145-02, accessed April 2009 at https://pubs.usgs.gov/fs/fs-145-02/FS-145-02.pdf

This geospatial data set consists of the bedrock formations of the High Plains aquifer, which underlies parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming.