This data release consists of information from published tables in Connecticut Water Resources Bulletins (WRBs) transcribed into tabular digital format. Information about wells and test holes in the WRBs used in this data release consists of geographic location, depth to consolidated rock (bedrock depth), and depth of the well or test hole. The WRBs, published between 1966 and 1980 by the U.S. Geological Survey (USGS) in cooperation with either the Connecticut Water Resources Commission or the Connecticut Department of Environmental Protection, provided the foundational datasets for companion interpretive USGS Water-Resources Investigation Reports. NOTE: Version 2.0 adds 196 records but is otherwise identical to the original version. First posted - April 14, 2021 (available from author) Revised: September 2021 (ver. 2.0)

This data release consists of a single ESRI shapefile, Hydrogeo_SECTpts, with geologic information from the previously published Hydrogeology of Southeastern Connecticut (Melvin, 1974). Test boring location points digitized from georeferenced area maps (1:24,000 scale) are attributed with associated well log information: town, identification numbers, altitude, depth to bottom, and remarks regarding the geology of the well finish. Descriptions for the bottoms of boreholes recorded the source driller's logs.

This data release, RI_WRpts.gdb, consists of information from Rhode Island Ground-water maps published by the Rhode Island Water Resources Coordinating Board, the Rhode Island Port and Industrial Development Commission, Rhode Island Industrial Commission, and the Rhode Island Development Council; in cooperation with the U.S. Geological Survey. The point data on these maps have been digitized into a standard ArcGIS geodatabase format. Data about wells and test borings consists of geographic location, identification number, geologic material (bedrock or unconsolidated), altitude in feet of the bedrock surface or altitude of the bottom of well, and data source. Seismic survey locations and bedrock outcrops where they are shown as points on the source maps are also included. The Ground-water maps, published between 1948 and 1964, also show geologic information which is being used to create a revised surficial materials database for future publication.

This data release, RI_WRpts.gdb, consists of information from Rhode Island Ground-water maps published by the Rhode Island Water Resources Coordinating Board, the Rhode Island Port and Industrial Development Commission, Rhode Island Industrial Commission, and the Rhode Island Development Council; in cooperation with the U.S. Geological Survey. The point data on these maps have been digitized into a standard ArcGIS geodatabase format. Data about wells and test borings consists of geographic location, identification number, geologic material (bedrock or unconsolidated), altitude in feet of the bedrock surface or altitude of the bottom of well, and data source. Seismic survey locations and bedrock outcrops where they are shown as points on the source maps are also included. The Ground-water maps, published between 1948 and 1964, also show geologic information which is being used to create a revised surficial materials database for future publication.

This data release was prepared as part of an agreement between the California Department of Water Resources (DWR) and the United States Geological Survey (USGS) to support the Sustainable Groundwater Management Act (SGMA). Of the many components of that agreement, there is a specific task requiring the Enhancement of Digital Well Completion Reports. Well-completion reports (WCRs) contain information about the wells, such as construction characteristics and lithologic data that is very valuable to SGMA. The data set presented here is a compilation of lithologic information transcribed verbatim from a subset of WCRs contained in the DWR Online System for Well Completion Reports (OSWCR). The format of the lithologic descriptions follows the DWR free form entry method, which allows for any material description to be entered into the OSWCR without standardization. The lithologic descriptions for all depth intervals recorded (in feet below land surface) by the driller on the WCR are captured verbatim, with no regularization or correction for typographical or spelling errors. Some degree of data processing may be required by a user of this dataset depending on its intended use. This data release is intended to be updated as new WCRs are transcribed over time. WCR lithologic data featured in version 1.0 (published March 2023) focused on 5,841 WCRs from many types of wells located primarily along the length of the California Aqueduct in the Central Valley of California. WCR lithologic data added in version 2.0 (published June 2024) were from 4,958 select public-supply wells from throughout the state that had previously been included in a compilation of WCR location and construction data made by the USGS Groundwater Ambient Monitoring and Assessment-Priority Basin Project (GAMA-PBP). WCR lithologic data added in this version 3.0 (published July 2025) are from 8,448 more public-supply wells from throughout the state. As of July 2025, approximately 57 percent of the WCRs in this dataset are also in the GAMA-PBP compilation of refined location information and construction characteristic data from WCRs primarily from water-supply wells in select locations throughout the State (Borkovich and others, 2025; https://doi.org/10.5066/P93ICKAF). Subsequent revisions planned for the GAMA-PBP data release include compiling refined location information and construction characteristic data for more WCRs with lithologic data in this data release. The GAMA-PBP data release includes a flag to indicate which WCRs also have lithologic data compiled in this data release. All attributed values should be verified by reviewing the original WCR which can be retrieved from the California Open Data Portal WCR website (California DWR, 2025): https://data.ca.gov/dataset/well-completion-reports California Water Code Section 13752 allows for the release of redacted copies of well completion reports to the public. DWR is the authoritative source of these data. Version 1.0 posted March 28, 2023 Version 2.0 posted June 12, 2024 Version 3.0 posted July 18, 2025

This data release was prepared as part of an agreement between the California Department of Water Resources (DWR) and the United States Geological Survey (USGS) to support the Sustainable Groundwater Management Act (SGMA). Of the many components of that agreement, there is a specific task requiring the Enhancement of Digital Well Completion Reports. Well-completion reports (WCRs) contain information about the wells, such as construction characteristics and lithologic data that is very valuable to SGMA. The data set presented here is a compilation of lithologic information transcribed verbatim from a subset of WCRs contained in the DWR Online System for Well Completion Reports (OSWCR). The format of the lithologic descriptions follows the DWR free form entry method, which allows for any material description to be entered into the OSWCR without standardization. The lithologic descriptions for all depth intervals recorded (in feet below land surface) by the driller on the WCR are captured verbatim, with no regularization or correction for typographical or spelling errors. Some degree of data processing may be required by a user of this dataset depending on its intended use. This data release is intended to be updated as new WCRs are transcribed over time. WCR lithologic data featured in version 1.0 (published March 2023) focused on 5,841 WCRs from many types of wells located primarily along the length of the California Aqueduct in the Central Valley of California. WCR lithologic data added in version 2.0 (published June 2024) were from 4,958 select public-supply wells from throughout the state that had previously been included in a compilation of WCR location and construction data made by the USGS Groundwater Ambient Monitoring and Assessment-Priority Basin Project (GAMA-PBP). WCR lithologic data added in this version 3.0 (published July 2025) are from 8,448 more public-supply wells from throughout the state. As of July 2025, approximately 57 percent of the WCRs in this dataset are also in the GAMA-PBP compilation of refined location information and construction characteristic data from WCRs primarily from water-supply wells in select locations throughout the State (Borkovich and others, 2025; https://doi.org/10.5066/P93ICKAF). Subsequent revisions planned for the GAMA-PBP data release include compiling refined location information and construction characteristic data for more WCRs with lithologic data in this data release. The GAMA-PBP data release includes a flag to indicate which WCRs also have lithologic data compiled in this data release. All attributed values should be verified by reviewing the original WCR which can be retrieved from the California Open Data Portal WCR website (California DWR, 2025): https://data.ca.gov/dataset/well-completion-reports California Water Code Section 13752 allows for the release of redacted copies of well completion reports to the public. DWR is the authoritative source of these data. Version 1.0 posted March 28, 2023 Version 2.0 posted June 12, 2024 Version 3.0 posted July 18, 2025

This data release was prepared as part of an agreement between the California Department of Water Resources (DWR) and the United States Geological Survey (USGS) to support the Sustainable Groundwater Management Act (SGMA). Of the many components of that agreement there is a specific task requiring the Enhancement of Digital Well Completion Reports. Well-completion reports (WCRs) contain information about the wells, such as construction characteristics and lithologic data that is very valuable to SGMA. The data set presented here is a compilation of lithologic information transcribed verbatim from a subset of WCRs contained in the DWR Online System for Well Completion Reports (OSWCR). The format of the lithologic descriptions follows the DWR “free form” entry method which allows for any material description to be entered into the OSWCR without standardization. The lithologic descriptions for all depth intervals recorded (in feet below land surface) by the driller on the WCR are captured verbatim, with no regularization or correction for typographical or spelling errors. Some degree of data processing maybe required by a user of this dataset depending on its intended use. This data release is intended to be updated as new WCRs are transcribed over time. WCR lithologic data featured in version 1.0 focused on WCRs located primarily along the length of the California Aqueduct in the Central Valley of California. WCR lithologic data added in version 2.0 are from select public-supply wells (PSWs). The PSWs included in this update are those which have had their locations refined and construction characteristics captured as part of the USGS Groundwater Ambient Monitoring and Assessment Program-Priority Basin Project (GAMA-PBP) WCR attribution project. Users can find the list of attributed water supply wells compiled by the GAMA-PBP in Borkovich and others, 2023, https://doi.org/10.5066/P93ICKAF. All attributed values should be verified by reviewing the original WCR which can be retrieved from the California Open Data Portal WCR website: https://data.ca.gov/dataset/well-completion-reports California Water Code Section 13752 allows for the release of redacted copies of well completion reports to the public. DWR is the authoritative source of these data. Version 1.0 posted March 28, 2023 Version 2.0 posted June 14, 2024 Changes in version 2.0 1) Lithologic data captured from 4,832 well completion reports have been added to the previously published data set. 2) Additional previously unpublished data for well completion reports included in version 1.0 identified while compiling version 2.0 are also included in this update. 3) Added a new column to the data table that contains the publication date for each entry to help track version history. 4) Updates author information to include users who have contributed to the compilation effort following the publication of version 1.0. 5) Some minor revisions were made to the text of the first process step to improve clarity.

This geospatial data set represents about 2,500 locations of boreholes, shafts, tunnels, and drifts on and around the Nevada Test Site (NTS) where rock-samples have been collected. Information from the rock-samples is summarized for each hole and includes lithologic descriptions, physical and mechanical properties, fracture characteristics, and hydraulic properties where holes were completed below the water table. The digital data are accessed from the webpage for the NTS U.S. Geological Survey (USGS) Core Library and Data Center, Mercury, Nevada. Links to additional information, such as water-level data from the National Water Inventory System (NWIS), and USGS borehole graphical information are included for some holes.

This geospatial data set represents about 2,500 locations of boreholes, shafts, tunnels, and drifts on and around the Nevada Test Site (NTS) where rock-samples have been collected. Information from the rock-samples is summarized for each hole and includes lithologic descriptions, physical and mechanical properties, fracture characteristics, and hydraulic properties where holes were completed below the water table. The digital data are accessed from the webpage for the NTS U.S. Geological Survey (USGS) Core Library and Data Center, Mercury, Nevada. Links to additional information, such as water-level data from the National Water Inventory System (NWIS), and USGS borehole graphical information are included for some holes.

This data release consists of a ZIP file that includes: two Excel workbooks, detailed metadata files, and data directories. The Hydraulic Properties Database (HPD; Table-of-AQtests.xlsm) is an interactive Excel workbook that catalogues single-well, aquifer-test results at Pahute Mesa and vicinity. Results from 1,459 single-well, aquifer-test analyses are uniquely identified to 360 tested wells. The Integrated Borehole Workbook (Borehole_Index_PM.xlsm) is an interactive Excel workbook that presents integrated results from slug tests and pumping aquifer tests that took place in 17 boreholes in Pahute Mesa and vicinity from 1962 to 2013. The Metadata folder has detailed metadata.xml files for both Excel workbooks. Directories labeled USGS, NavarroPDF, or NavarroAQT are accompanying data that both Excel workbooks access through hyperlinks and are required to be downloaded for the Excel workbooks to properly function.