Lipan Aquiferinteractive map | cross-section

Summary

The Lipan Aquifer is a minor aquifer found in parts of Coke, Concho, Glasscock, Irion, Runnels, Schleicher, Sterling, and Tom Green counties in westcentral Texas. The aquifer includes waterbearing alluvium and the updip portions of older, underlying strata. The alluvium includes as much as 125 feet of saturated sediments of the Quaternary Leona Formation. These deposits consist mostly of gravels and conglomerates cemented with sandy lime and layers of clay. The formation generally fines upward with conglomerates existing mainly in locations of thicker alluvium. The underlying strata include the San Angelo Sandstone of the Pease River Group and the Choza Formation, Bullwagon Dolomite, Vale Formation, Standpipe Limestone, and Arroyo Formation of the Clear Fork Group. These units are predominantly limestones and shales. Groundwater in the alluvial deposits and the upper parts of the older rocks is hydraulically connected, and most wells in the area are completed in both units. Groundwater flow in the Lipan Aquifer does not appear to be structurally controlled. Higher production wells appear to correspond to alluvial deposits overlying the Choza, Bullwagon, and Vale formations. In these areas, thick alluvial deposits with conglomerates lie near the contact with the Permian.

Groundwater in the alluvium ranges from fresh to slightly saline, containing between 350 and 3,000 milligrams per liter of total dissolved solids, and is very hard. Water in the underlying parts of the Choza Formation and Bullwagon Dolomite tends to be moderately saline with total dissolved solids in excess of 3,000 milligrams per liter.

The aquifer is primarily used for irrigation but also supports livestock and municipal, domestic, and manufacturing uses. Because of drought and heavy irrigation pumping in the late 1990s, water levels decreased significantly in some areas, and the aquifer could not be pumped through the entire irrigation season. In other areas, however, the aquifer could be pumped, but only at a reduced rate.

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
R-360 2/9/2004 TWDB numbered report Conference Proceedings: Aquifers of the Edwards Plateau
R-146 4/1/1972 TWDB numbered report Water Well and Ground-Water Chemical Analysis Data, Irion County, Texas
R-166 3/1/1973 TWDB numbered report Ground-Water Resources of Coke County, Texas
GR10-026_MP 8/24/2010 GAM run - Management Plan Management plan information for Sterling County UWCD
GR10-002 9/3/2010 GAM run Simulations of current operational practices in the Lipan Aquifer in Groundwater Management Area 7
GR08-051_MP 7/9/2008 GAM run - Management Plan Management plan information for Plateau UWC and Supply District
GR08-012_MP 4/8/2008 GAM run - Management Plan Management plan information for Irion County WCD
GR08-008_MP 1/25/2008 GAM run - Management Plan Management plan information for Lipan-Kickapoo GCD
GR07-039_MP 4/8/2008 GAM run - Management Plan Management plan information for Coke County GCD
GR07-013 10/5/2007 GAM run Predictive simulation for the Lipan Aquifer in Groundwater Management Area 7
GR06-015_MP 9/1/2011 GAM run - Management Plan Management plan information for Lipan Kickapoo WCD
GR12-010_MP 7/2/2012 GAM run - Management Plan Management plan data for Lipan-Kickapoo WCD
R-380 7/1/2011 TWDB numbered report Aquifers of Texas
GR12-019_MP 11/16/2012 GAM run - Management Plan Management plan data for Coke County UWCD
GR12-017_MP 11/16/2012 GAM run - Management Plan Management plan data for Irion County WCD
GR10-062_MAG_Ver2 2/28/2012 GAM run - MAG Modeled available groundwater estimates for the Lipan Aquifer in Groundwater Management Area 7
GR13-009_MP 7/17/2013 GAM run - Management Plan Management Plan Information For Plateau UWCD and SD
GT13-030_TERS 10/2/2013 GAM task - Total Estimated Recoverable Storage Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 7
GR17-012_MP 3/28/2017 GAM run - Management Plan Management plan information for Sterling County UWCD
GR17-005_MP 5/26/2017 GAM run - Management Plan Management plan information for Lipan-Kickapoo Water Conservation District
Top