This dataset consists of water well locations, selected well-construction data, and hydrologic data, that are based on permit transactions submitted to the State Engineer Office, Division of Water Resources, Colorado Department of Natural Resources.

This geospatial data includes oil and gas wells within the Colorado portion of the Raton Basin, as of January 2005. It includes a subset of over 60,000 existing and proposed oil and gas well locations within the State of Colorado. The well point data represent permitted locations, most of which have been drilled and completed, or drilled and abandoned. Some permitted locations were never drilled; these locations are also included in the shapefile. Selected well identification numbers and other header information are provided as attributes. The Colorado Oil and Gas Conservation Commission (COGCC) is the official repository for Colorado's oil and gas information. Links to the COGCC website and to the shapefile (WELL_SHP), which were used to develop this geospatial data, are provided in the Cross-Reference section in these metadata.

The U.S. Geological Survey developed a coupled groundwater and surface-water flow (GSFLOW) model to represent the aquifers of the Colorado Plateau and Upper Colorado River Basin. The study area covers approximately 142,000 square miles and includes parts of Arizona, Colorado, New Mexico, Utah, and Wyoming. To support this modeling effort, groundwater well withdrawal volume data were needed from January 01, 1980 to September 30, 2022. These data were retrieved from online state databases. In addition to withdrawal-volume data, well-construction data including depths and/or perforated casing intervals were recorded when available from the databases and/or scanned driller’s logs. Arizona groundwater-withdrawal volume and well-construction data were downloaded from the Arizona Department of Water Resources. Colorado groundwater-withdrawal volume and well-construction data were accessed via the Colorado Department of Natural Resources Decision Support Systems. New Mexico groundwater-withdrawal volume and well-construction data were downloaded from the New Mexico Office of the State Engineer’s New Mexico Water Rights Reporting System (NMWRRS). Utah groundwater-withdrawal volume and well-construction data were accessed via the Utah Division of Water Rights Water Use Data Portal and Utah's State Geographic Information Database (SGID). Wyoming groundwater-withdrawal volume and well-construction data were retrieved from the Wyoming Water Development Office Public Water System Surveys and Wyoming State’s Engineer Office. Because of the different state databases, each state has slightly different information (see Supplemental Information).

The U.S. Geological Survey developed a coupled groundwater and surface-water flow (GSFLOW) model to represent the aquifers of the Colorado Plateau and Upper Colorado River Basin. The study area covers approximately 142,000 square miles and includes parts of Arizona, Colorado, New Mexico, Utah, and Wyoming. To support this modeling effort, groundwater well withdrawal volume data were needed from January 01, 1980 to September 30, 2022. These data were retrieved from online state databases. In addition to withdrawal-volume data, well-construction data including depths and/or perforated casing intervals were recorded when available from the databases and/or scanned driller’s logs. Arizona groundwater-withdrawal volume and well-construction data were downloaded from the Arizona Department of Water Resources. Colorado groundwater-withdrawal volume and well-construction data were accessed via the Colorado Department of Natural Resources Decision Support Systems. New Mexico groundwater-withdrawal volume and well-construction data were downloaded from the New Mexico Office of the State Engineer’s New Mexico Water Rights Reporting System (NMWRRS). Utah groundwater-withdrawal volume and well-construction data were accessed via the Utah Division of Water Rights Water Use Data Portal and Utah's State Geographic Information Database (SGID). Wyoming groundwater-withdrawal volume and well-construction data were retrieved from the Wyoming Water Development Office Public Water System Surveys and Wyoming State’s Engineer Office. Because of the different state databases, each state has slightly different information (see Supplemental Information).

This tabular dataset contains the location and construction information of select wells in the Albuquerque area, central New Mexico, and groundwater-level measurements at those wells from 2014 to 2018. Wells in this dataset are screened or assumed to be screened in the production zone (generally the interval of the aquifer where production wells are screened) of the Santa Fe Group aquifer system. Groundwater-level elevations from this dataset were used to create groundwater-level contours for winter of water year 2016.

This tabular dataset contains the location and construction information of select wells in the Albuquerque area, central New Mexico, and groundwater-level measurements at those wells from 2014 to 2018. Wells in this dataset are screened or assumed to be screened in the production zone (generally the interval of the aquifer where production wells are screened) of the Santa Fe Group aquifer system. Groundwater-level elevations from this dataset were used to create groundwater-level contours for winter of water year 2016.

This report provides a full digitization of historic groundwater-quality and depth-to-water data from Mendenhall and others (1916) Water Supply Paper 398, “Ground Water in San Joaquin Valley, California” in a modern format suitable for further analysis of California’s water supply resources. Included are geochemical data for over 400 wells collected by Mendenhall in the fall of 1910, as well as depth-to-water and well construction information from over 4000 wells compiled by his team from over 15 years of well surveys throughout the San Joaquin Valley. Additionally, these data provide geospatial and geochemical data for sampled wells in California's San Joaquin Valley (SJV) in support of the publication: Hansen, J.A., Jurgens, B.C, Fram, M.S., Quantifying Anthropogenic Contributions to Century-Scale Groundwater Salinity Changes, San Joaquin Valley, California, USA, Science of the Total Environment, vol. XX, no. X, pp. XX-XX, 2018.

This report provides a full digitization of historic groundwater-quality and depth-to-water data from Mendenhall and others (1916) Water Supply Paper 398, “Ground Water in San Joaquin Valley, California” in a modern format suitable for further analysis of California’s water supply resources. Included are geochemical data for over 400 wells collected by Mendenhall in the fall of 1910, as well as depth-to-water and well construction information from over 4000 wells compiled by his team from over 15 years of well surveys throughout the San Joaquin Valley. Additionally, these data provide geospatial and geochemical data for sampled wells in California's San Joaquin Valley (SJV) in support of the publication: Hansen, J.A., Jurgens, B.C, Fram, M.S., Quantifying Anthropogenic Contributions to Century-Scale Groundwater Salinity Changes, San Joaquin Valley, California, USA, Science of the Total Environment, vol. XX, no. X, pp. XX-XX, 2018.

Groundwater-quality data collected between 1993 and 2015 were compiled from the U.S. Geological Survey (USGS) National Water Information System (NWIS) database for 722 wells in the San Joaquin Valley (SJV). Groundwater-quality data retrieved included lab analyses of complete major ion data (calcium, magnesium, sodium, potassium, chloride, sulfate, nitrate, alkalinity, bicarbonate, carbonate, silica, and TDS) for 613 samples, and an additional 109 samples with measured values of specific conductance. Most of these wells were sampled as part of the California Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project or the USGS National Water Quality Assessment (NAWQA) Program. In addition to GW quality data, the dataset includes well depths, measured or interpolated water levels, summary land-use information, and a tritium-based groundwater age classification. Each well was assigned to a geospatial grid cell in one of six SJV regions (https://www.sciencebase.gov/catalog/item/5892423ee4b072a7ac145e06). These data support the following publication: Hansen, J.A., Jurgens, B.C, Fram, M.S., Quantifying Anthropogenic Contributions to Century-Scale Groundwater Salinity Changes, San Joaquin Valley, California, USA: Science of the Total Environment, vol. XX, no. X, pp. XX-XX, 2018.

Groundwater-quality data collected between 1993 and 2015 were compiled from the U.S. Geological Survey (USGS) National Water Information System (NWIS) database for 722 wells in the San Joaquin Valley (SJV). Groundwater-quality data retrieved included lab analyses of complete major ion data (calcium, magnesium, sodium, potassium, chloride, sulfate, nitrate, alkalinity, bicarbonate, carbonate, silica, and TDS) for 613 samples, and an additional 109 samples with measured values of specific conductance. Most of these wells were sampled as part of the California Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project or the USGS National Water Quality Assessment (NAWQA) Program. In addition to GW quality data, the dataset includes well depths, measured or interpolated water levels, summary land-use information, and a tritium-based groundwater age classification. Each well was assigned to a geospatial grid cell in one of six SJV regions (https://www.sciencebase.gov/catalog/item/5892423ee4b072a7ac145e06). These data support the following publication: Hansen, J.A., Jurgens, B.C, Fram, M.S., Quantifying Anthropogenic Contributions to Century-Scale Groundwater Salinity Changes, San Joaquin Valley, California, USA: Science of the Total Environment, vol. XX, no. X, pp. XX-XX, 2018.