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Ellenburger-San Saba Aquifer interactive m ap | cross-section Summary
The Ellenburger−San Saba Aquifer is a minor aquifer that is found in parts of 15 counties in the Llano Uplift area of Central Texas. The aquifer consists of the Tanyard, Gorman, and Honeycut formations of the Ellenburger Group and the San Saba Limestone Member of the Wilberns Formation. The aquifer consists of a sequence of limestone and dolomite that crop out in a circular pattern around the Llano Uplift and dip radially into the subsurface away from the center of the uplift to depths of approximately 3,000 feet. Regional block faulting has significantly compartmentalized the aquifer. The maximum thickness of the aquifer is about 2,7 00 feet. Water is held in fractures, cavities, and solution channels and is commonly under confined conditions. The aquifer is highly permeable in places, as indicated by wells that yield as much as 1,000 gallons per minute and springs that issue from the aquifer, maintaining the base flow of streams in the area.
Water produced from the aquifer is inherently hard and usually has less than 1,000 milligrams per liter of total dissolved solids. Fresh to slightly saline water extends downdip to depths of approximately 3,000 feet. Elevated concentrations of radium and radon also occur in the aquifer.
Most of the groundwater is used for municipal purposes, and the remainder for irrigation and livestock. A large portion of water flowing from San Saba Springs, which is the water supply for the city of San Saba, is thought to be from the Ellenburger−San Saba and Marble Falls aquifers. Reports
ID Date T y pe Description Aquifer AA08- Managed available groundwater estimates for the Ellenburger-San 12/10/2009 assessment 03_MAG Saba Aquifer in Groundwater Management Area 8 MAG Aquifer Desired future condition scenarios for the Ellenburger-San Saba AA08-08 8/31/2010 assessment Aquifer in Groundwater Management Area 7 Aquifer Managed available groundwater estimates for the Ellenburger-San AA10-01_MAG 6/22/2011 assessment Saba Aquifer in Groundwater Management Area 9 MAG Aquifer Desired future condition scenarios for the Ellenburger-San Saba AA10-04 9/10/2010 assessment Aquifer in Groundwater Management Area 7 Aquifer Modeled available groundwater for the Ellenburger-San Saba Aquifer AA10-10_MAG 11/1/2011 assessment in Groundwater Management Area 7 MAG Aquifer Modeled available groundwater estimates for the Ellenburger-San AA10-15_MAG 12/30/2011 assessment Saba Aquifer in Groundwater Management Area 8 MAG Groundwater Reconnaissance Investigation of the Ground-Water Resources of the B-6310 12/1/197 3 bulletin Brazos River Basin, Texas Groundwater B-6519 8/1/1965 Ground-Water Conditions in Menard County, Texas bulletin CR- Contract Aquifer Test and Related Well Information from Public Water Supply 7 /11/2012 1004831116 report Wells in Groundwater Management Area 8 Desired future conditions for the Capitan Reef Complex, Dockum, DFC GMA7 _DFC_01 7 /29/2010 Edwards-Trinity (Plateau), Ellenburger-San Saba, Hickory, Lipan, submission GMA7 _DFC_01 7 /29/2010 Edwards-Trinity (Plateau), Ellenburger-San Saba, Hickory, Lipan, submission Marble Falls, Ogallala, and Rustler aquifers DFC Desired future conditions for the Ellenburger-San Saba, Hickory, and GMA8_DFC_02 5/19/2008 submission Marble Falls aquifers Desired future conditions for the Blossom, Brazos River Alluvium, DFC GMA8_DFC_05 4/27 /2011 Edwards (Balcones Fault Zone), Ellenburger-San Saba, Hickory, submission Marble Falls, Nacatoch, Trinity, and Woodbine aquifers Desired future conditions for the Edwards Group of the Edwards- DFC GMA9_DFC_01 8/29/2008 Trinity (Plateau), Ellenburger-San Saba, Hickory, and Marble Falls submission aquifers TWDB R-046 5/1/1967 numbered Occurrence and Quality of Ground Water in Brown County, Texas report TWDB R-057 9/1/1967 numbered Occurrence and Quality of Ground Water in Coleman County, Texas report TWDB R-17 4 7 /1/197 3 numbered Ground-Water Resources of Blanco County, Texas report TWDB Occurrence, Availability, and Chemical Quality of Ground Water in R-235 7 /1/197 9 numbered the Edwards Plateau Region of Texas report TWDB Evaluation of Ground-Water Resources of the Paleozoic and R-339 8/1/1992 numbered Cretaceous Aquifers in the Hill Country of Central Texas report TWDB R-346 3/1/1996 numbered The Paleozoic and Related Aquifers of Central Texas report TWDB R-360 2/9/2004 numbered Conference Proceedings: Aquifers of the Edwards Plateau report TWDB R-380 7 /1/2011 numbered Aquifers of Texas report
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