Nottmeier, Anna M. Pugh, Aaron L. 20250314 vector digital data Denver, CO U.S. Geological Survey https://doi.org/10.5066/P9025EEW Datasets includes groundwater well locations and 2015 water-level measurements for 31 wells, 20-foot contours, and water-level change for 31 wells measured in 2009 and 2015 of the Cockfield (upper Claiborne) aquifer. Data also includes groundwater well locations and 2015 water-level measurements for 37 wells, 10-foot contours of the northern Wilcox aquifer, 20-foot contours of the southern Wilcox aquifer, and water-level change for 31 wells measured in 2009 and 2015 of the Wilcox aquifer. Rasters for each aquifer were also constructed. Well-location and water-level data are publicly available from the U.S. Geological Survey's National Water Information System, April through June 2015 (U.S. Geological Survey, 2016). These data are collected as part of an ongoing cooperative agreement between the U.S. Geological Survey, Arkansas Department of Agriculture - Natural Resources Division, Arkansas Geological Survey, Natural Resources Conservation Services and the Union County Water Conservation Board, to quantify current groundwater resources, evaluate changes in these resources over time, and provide the information needed to address future human-related and environmental stresses. 20150428 20150616 ground condition Complete None planned -93.6519 -89.7728 36.1767 32.9955 USGS Thesaurus groundwater groundwater level water resources hydrogeology water use Marine Realms Information Bank (MRIB) keywords aquifer water well effects of groundwater extraction USGS Metadata Identifier USGS:5d84071ce4b0c4f70d07168b Common geographic areas Arkansas USGS Groundwater Information: Principal Aquifers of the United States Mississippi embayment aquifer system Cockfield (upper Claiborne) aquifer Wilcox aquifer Please see 'Distribution-Info' for details. There is no guarantee concerning the accuracy of the data. Any user who modifies the data is obligated to describe the types of modifications they perform. Data have been checked to ensure the accuracy. If any errors are detected, please notify the originating office. The U.S. Geological Survey strongly recommends that careful attention be paid to the metadata file associated with these data. Acknowledgment of the U.S. Geological Survey would be appreciated in products derived from these data. User specifically agrees not to misrepresent the data, nor to imply that changes made were approved or endorsed by the U.S. Geological Survey. Please refer to <http://www.usgs.gov/privacy.html> for the USGS disclaimer. U.S. Geological Survey, Lower Mississippi-Gulf Water Science Center Anna M. Nottmeier Hydrologist mailing and physical

700 West Research Ctr Blvd

Fayetteville AR 72701 501-515-4331 anottmeier@usgs.gov Arkansas Department of Agriculture-Natural Resources Division, Arkansas Geological Survey, and Natural Resources Conservation Services ArcGIS Pro 3.1.3 and ArcGIS Desktop 10.5 No formal attribute accuracy tests were conducted No formal logical accuracy tests were conducted Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. No formal positional accuracy tests were conducted No formal positional accuracy tests were conducted Cunningham, W. L. Schalk, C. W. 2011 publication U.S. Geological Survey Techniques and Methods 1–A1 Reston, VA U.S. Geological Survey http://pubs.usgs.gov/tm/1a1/ Digital and/or Hardcopy 20150428 20150616 observed Cunningham and Schalk, 2011 Source information used in support of the development of the dataset. Environmental Systems Research Institute (ESRI) 20170101 application/service Redlands, CA Environmental Systems Research Institute (ESRI) http://pro.arcgis.com/en/pro-app/tool-reference/3d-analyst/how-topo-to-raster-works.htm Digital and/or Hardcopy 20150428 20150616 publication date ESRI, 2017a Source information used to construct raster. Environmental Systems Research Institute (ESRI) 20170101 tabular digital data Redlands, CA Environmental Systems Research Institute (ESRI) http://pro.arcgis.com/en/pro-app/tool-reference/3d-analyst/contour.htm Digital and/or Hardcopy 20150428 20150616 publication date ESRI, 2017b Source information used to construct contours. Environmental Systems Research Institute (ESRI) 2018 application/service Redlands, CA Environmental Systems Research Institute (ESRI) https://desktop.arcgis.com/en/ Digital and/or Hardcopy 20150428 20150616 observed ESRI, 2018 Program used to construct 2015 potentiometric-surface map and plot well points. Environmental Systems Research Institute (ESRI) 2023 application/service Redlands, CA Environmental Systems Research Institute (ESRI) https://www.esri.com/en-us/home Digital and/or Hardcopy 20150601 20150616 observed ESRI, 2023 Program used to construct 2015 potentiometric-surface rasters and plot well points. U.S. Geological Survey 2016 application/service Reston, VA U.S. Geological Survey http://dx.doi.org/10.5066/F7P55KJN Digital and/or Hardcopy 20150428 20150616 observed U.S. Geological Survey, 2016 Access to water-resources data collected in 2015 U.S. Geological Survey - Water Resources Division 1988 publication U.S. Geological Survey Circular 878-C Reston, VA U.S. Geological Survey https://doi.org/10.3133/cir878C Digital and/or Hardcopy 1988 publication date U.S. Geological Survey - Water Resources Division, 1988 The eight-character string identifying an aquifer. Codes are defined by the "Catalog of Aquifer Names and Geologic Unit Codes used by the Water Resources Division. Online aquifer code list can be accessed at https://help.waterdata.usgs.gov/aqfr_cd. See shapefile metadata for each process. 2019 Vector Entity point 37 Albers Conical Equal Area 29.5 45.5 -96.0 23.0 0.0 0.0 coordinate pair 0.6096 0.6096 meters North_American_Datum_1983 GRS_1980 6378137.0 298.257222101 North American Vertical Datum of 1988 1.0 feet Attribute values Land survey datum 1.0 feet Attribute values U.S. Geological Survey - ScienceBase ScienceBase mailing and physical

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Denver CO 80225 US 1-888-275-8747 sciencebase@usgs.gov Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this information product, for the most part, is in the public domain, it also contains copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner whenever applicable. The data have been approved for release and publication by the U.S. Geological Survey (USGS). Although the data have been subjected to rigorous review and are substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, the data are released on the condition that neither the USGS nor the U.S. Government may be held liable for any damages resulting from authorized or unauthorized use. Although the data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein. Users of the data are advised to read all metadata and associated documentation thoroughly to understand appropriate use and data limitations. Digital Data ArcGIS 10.5 and ArcGIS Pro 3.1.3 https://doi.org/10.5066/P9025EEW No fees are applicable for obtaining the dataset. 20250314 U.S. Geological Survey, Lower Mississippi-Gulf Water Science Center Anna M. Nottmeier Hydrologist mailing and physical

700 W. Research Center Blvd MS36

Fayetteville Arkansas 72701 US 501-515-4331 479-442-4066 anottmeier@usgs.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time