Data to Accompany the Regional Potentiometric-Surface Map of the Great Basin Carbonate and Alluvial Aquifer System in Snake Valley and Surrounding Areas, Juab, Millard, and Beaver Counties, Utah and White Pine and Lincoln Counties, Nevada

Water-level measurements from 190 wells were used to develop a potentiometric-surface map of the
east-central portion of the regional Great Basin carbonate and alluvial aquifer system in and around
Snake Valley, eastern Nevada and western Utah. The map area covers approximately 9,000 square
miles in Juab, Millard, and Beaver Counties, Utah, and White Pine and Lincoln Counties, Nevada.
Recent (2007-2010) drilling by the Utah Geological Survey and U.S. Geological Survey has provided
new data for areas where water-level measurements were previously unavailable. New water-level data
were used to refine mapping of the pathways of intrabasin and interbasin groundwater flow. At 20 of
these locations, nested observation wells provide vertical hydraulic gradient data and information
related to the degree of connection between basin-fill aquifers and consolidated-rock aquifers.
Multiple-year water-level hydrographs are also presented for 32 wells to illustrate the aquifer
system’s response to interannual climate variations and well withdrawals.