Hickory Aquiferinteractive map | cross-section

Summary

The Hickory Aquifer, a minor aquifer found in the central part of the state, consists of the water−bearing parts of the Hickory Sandstone Member of the Riley Formation. The Hickory Aquifer reaches a maximum thickness of 480 feet, and freshwater saturated thickness averages about 350 feet.

Although the groundwater is generally fresh, with total dissolved solids concentrations of less than 1,000 milligrams per liter, the upper portion of the aquifer typically contains iron in excess of the state's secondary drinking water standards. Of greater concern is naturally occurring radioactivity: gross alpha radiation, radium, and radon are commonly found in excess of the state's primary drinking water standards.

The groundwater is used for irrigation throughout its extent and for municipal supply in the cities of Brady, Mason, and Fredericksburg. Slight water level fluctuations occur seasonally in irrigated areas.

Reports

ID Date Type Description
GMA7_DFC_01 7/29/2010 DFC submission Desired future conditions for the Capitan Reef Complex, Dockum, Edwards-Trinity (Plateau), Ellenburger-San Saba, Hickory, Lipan, Marble Falls, Ogallala, and Rustler aquifers
GMA9_DFC_01 8/29/2008 DFC submission Desired future conditions for the Edwards Group of the Edwards-Trinity (Plateau), Ellenburger-San Saba, Hickory, and Marble Falls aquifers
GMA8_DFC_02 5/19/2008 DFC submission Desired future conditions for the Ellenburger-San Saba, Hickory, and Marble Falls aquifers
B-6004 8/1/1960 Groundwater bulletin Geology and Ground-Water Resources of Hays County, Texas
R-057 9/1/1967 TWDB numbered report Occurrence and Quality of Ground Water in Coleman County, Texas
R-235 7/1/1979 TWDB numbered report Occurrence, Availability, and Chemical Quality of Ground Water in the Edwards Plateau Region of Texas
R-174 7/1/1973 TWDB numbered report Ground-Water Resources of Blanco County, Texas
R-360 2/9/2004 TWDB numbered report Conference Proceedings: Aquifers of the Edwards Plateau
R-346 3/1/1996 TWDB numbered report The Paleozoic and Related Aquifers of Central Texas
R-339 8/1/1992 TWDB numbered report Evaluation of Ground-Water Resources of the Paleozoic and Cretaceous Aquifers in the Hill Country of Central Texas
B-6519 8/1/1965 Groundwater bulletin Ground-Water Conditions in Menard County, Texas
B-6017 2/1/1961 Groundwater bulletin Ground-Water Geology of the Hickory Sandstone Member of the Riley Formation, McCulloch County, Texas
AA08-07 8/31/2010 Aquifer assessment Desired future condition scenarios for the Hickory Aquifer in Groundwater Management Area 7
AA10-05 9/10/2010 Aquifer assessment Desired future condition scenarios for the Hickory Aquifer in Groundwater Management Area 7
GMA8_DFC_05 4/27/2011 DFC submission Desired future conditions for the Blossom, Brazos River Alluvium, Edwards (Balcones Fault Zone), Ellenburger-San Saba, Hickory, Marble Falls, Nacatoch, Trinity, and Woodbine aquifers
AA10-02_MAG 6/22/2011 Aquifer assessment MAG Managed available groundwater estimates for the Hickory Aquifer in Groundwater Management Area 9
AA08-04_MAG 12/10/2009 Aquifer assessment MAG Managed available groundwater estimates for the Hickory Aquifer in Groundwater Management Area 8
AA10-16_MAG 12/7/2011 Aquifer assessment MAG Modeled available groundwater estimates for the Hickory Aquifer in Groundwater Management Area 8
AA10-11_MAG 11/1/2011 Aquifer assessment MAG Modeled available groundwater for the Hickory Aquifer in Groundwater Management Area 7
CR-1004831116 7/11/2012 Contract report Aquifer Test and Related Well Information from Public Water Supply Wells in Groundwater Management Area 8
R-380 7/1/2011 TWDB numbered report Aquifers of Texas
GT13-030_TERS 10/2/2013 GAM task - Total Estimated Recoverable Storage Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 7
GT13-032_TERS 10/2/2013 GAM task - Total Estimated Recoverable Storage Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 9
GT13-031_TERS 1/15/2014 GAM task - Total Estimated Recoverable Storage Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 8
GR16-006_MP 6/21/2016 GAM run - Management Plan Management plan information for Central Texas GCD
GR16-019_MP 9/17/2016 GAM run - Management Plan Management plan information for Headwaters GCD
GR17-028_MP 3/27/2017 GAM run - Management Plan Management plan information for Menard County UWD
GR17-005_MP 5/26/2017 GAM run - Management Plan Management plan information for Lipan-Kickapoo Water Conservation District
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