Groundwater Management Area 12

Groundwater Management Area 12 Webpage

Groundwater management area 12 location map

Contact Information

Groundwater Management Area 12 Public Comment Form (posted 12/4/19)

Post Oak Savannah Groundwater Conservation District
Gary Westbrook
General Manager
P.O. Box 92
Milano, Texas 76556
Telephone: 512-455-9900
Fax: 512-455-9909
Email: gwestbrook@posgcd.org

Regional Water Planning Group Representatives:
Region C: David Bailey
Region G: Gary Westbrook
Region H: David Bailey
Region K: Jim Totten

2021 Joint Planning Desired future conditions and modeled available groundwater

Summary of Desired Future Conditions for GMA 12

Additional 2021 Joint Planning Documents

*Modeled available groundwater based on 2021 adopted desired future conditions coming soon*

Modeled availalbe groundwater from 2016 joint planning is available here.

Groundwater Conservation Districts (5 either partially or completely included)

  • Brazos Valley Groundwater Conservation District
  • Fayette County Groundwater Conservation District
  • Lost Pines Groundwater Conservation District
  • Mid-East Texas Groundwater Conservation District
  • Post Oak Savannah Groundwater Conservation District

Additional Groundwater Conservation District Information


Aquifers(either partially or completely included)

Component Counties

GMA 12 Reports

ID Date Type Description
GR17-030_MAG 12/15/2017 GAM run - MAG Modeled available groundwater for the aquifers in Groundwater Management Area 12
HA-05 1/1/1997 Hydrologic atlas Water Quality in the Sparta Aquifer
HA-06 1/1/1997 Hydrologic atlas Water Quality in the Queen City Aquifer
CR-0099483279 3/1/2000 Contract report Transmissivity, Hydraulic Conductivity, and Storativity of the Carrizo-Wilcox Aquifer in Texas
GMA12_DFC_01 8/11/2010 DFC submission Desired future conditions for the Carrizo-Wilcox, Queen City, Sparta, Yegua-Jackson, and Brazos River Alluvium aquifers
R-295 10/1/1986 TWDB numbered report Hydrology of the Jasper Aquifer in the Southeast Texas Coastal Plain
R-332 9/1/1991 TWDB numbered report Ground-Water Resources of the Carrizo-Wilcox Aquifer in the Central Texas Region
B-6310 12/1/1973 Groundwater bulletin Reconnaissance Investigation of the Ground-Water Resources of the Brazos River Basin, Texas
R-185 9/1/1974 TWDB numbered report Ground-Water Resources of Brazos and Burleson Counties, Texas
R-067 12/1/1967 TWDB numbered report Reconnaissance of the Chemical Quality of Surface Waters of the Trinity River Basin, Texas
R-115 4/1/1970 TWDB numbered report Time of Travel of Translatory Waves on the Brazos, Leon and Little Rivers, Texas
B-6513 5/1/1965 Groundwater bulletin Availability and Quality of Ground Water in Leon County, Texas
R-041 3/1/1967 TWDB numbered report Ground Water in the Flood-Plain Alluvium of the Brazos River, Whitney Dam to Vicinity of Richmond, Texas
R-350 11/1/1999 TWDB numbered report Changes in Groundwater Conditions in the Edwards and Trinity Aquifers, 1987-1997, for Portions of Bastrop, Bell, Burnet, Lee, Milam, Travis, and Williamson Counties, Texas
R-150 8/1/1972 TWDB numbered report Ground-Water Conditions in Anderson, Cherokee, Freestone, and Henderson Counties, Texas
R-109 3/1/1970 TWDB numbered report Ground-Water Resources of Bastrop County, Texas
R-020 3/1/1966 TWDB numbered report Ground-Water Resources of Lee County, Texas
R-160 11/1/1972 TWDB numbered report Ground-Water Resources of Navarro County, Texas
LP-208 1/1/1989 Limited publication A Digital Model of the Carrizo-Wilcox Aquifer Within the Colorado River Basin of Texas (cross-section figures linked here)
R-071 3/1/1968 TWDB numbered report Reconnaissance of the Chemical Quality of the Surface Waters of the Colorado River Basin, Texas
R-056 8/1/1967 TWDB numbered report Availability and Quality of Ground Water in Fayette County, Texas
GMA12_DFC_02 6/30/2011 DFC submission Desired future conditions for the Yegua-Jackson Aquifer
GR10-029_MP 1/4/2011 GAM run - Management Plan Management plan information for Post Oak Savannah GCD
GR16-015_MP 8/31/2017 GAM run - Management Plan Management plan information for Post Oak Savannah GCD
GT10-012 9/9/2010 GAM task Predictive simulations for the Yegua-Jackson Aquifer
GT10-024 7/16/2010 GAM task Analysis of pumping information for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 12
GR10-014_MP 6/9/2010 GAM run - Management Plan Management plan information for Lost Pines GCD
GR10-013_MP 10/4/2011 GAM run - Management Plan Management plan information for Brazos Valley GCD
GR08-089_MP 5/20/2009 GAM run - Management Plan Management plan information for Lost Pines GCD
GR08-077_MP 2/25/2009 GAM run - Management Plan Management plan information for Mid-East Texas GCD
GR08-073_MP 12/9/2008 GAM run - Management Plan Management plan information for Brazos Valley GCD
GR08-035_MP 5/29/2008 GAM run - Management Plan Management plan information for Fayette County GCD
GR06-019 9/7/2006 GAM run Predictive simulation for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Fayette County GCD
GR06-009 5/31/2006 GAM run Predictive simulation for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Mid-East Texas GCD
GR06-005 3/17/2006 GAM run Impacts of pumping increases in the in the Carrizo-Wilcox Aquifer near Jewett, Texas (Leon County)
GR05-005 3/31/2005 GAM run Post Oak Savannah GCD, water budget, water levels, drawdown through 2050, 2002 State Water Plan pumping summary, and interaction with the Brazos River Alluvium Aquifer
GR04-004 3/5/2004 GAM run Statistical summary and map of storage coefficient for the Simsboro Aquifer in Burleson County
GR04-003 2/9/2004 GAM run Statistical summary and map of transmissivity of the Simsboro Aquifer in Burleson County
GR04-001 4/22/2004 GAM run Recharge amounts and maximum pumping needed to maintain current water levels in Mid-East Texas GCD
GR03-031 12/9/2003 GAM run Recharge amounts and maximum pumping that allows maintaining current water levels in Mid-East Texas GCD
GR03-030 3/5/2004 GAM run Predictive run using Region C provided pumping
GR03-028 9/19/2003 GAM run Predictive run using pumping data provided by Post Oak Savannah GCD
GR03-024 9/5/2003 GAM run Total water availability in Henderson, Navarro, and Freestone counties
GR03-019 8/25/2003 GAM run Recharge information and total storage above 3000 feet using a predictive simulation in Milam and Burleson counties
GR03-017 8/18/2003 GAM run Recharge and total storage data for the Carrizo-Wilcox, Queen City, Sparta, and Gulf Coast aquifers in Fayette County GCD
GR03-014 7/28/2003 GAM run Water availability for the Carrizo-Wilcox Aquifer in Henderson, Navarro, and Freestone counties
AA10-20_MAG 7/9/2012 Aquifer assessment MAG Modeled available groundwater for the Brazos River Alluvium Aquifer in Groundwater Management Area 12
GR10-044_MAG 7/9/2012 GAM run - MAG Modeled available groundwater for the Carrizo-Wilcox Aquifer in Groundwater Management Area 12
GR10-045_MAG 7/9/2012 GAM run - MAG Modeled available groundwater for the Queen City Aquifer in Groundwater Management Area 12
GR10-046_MAG 7/9/2012 GAM run - MAG Modeled available groundwater for the Sparta Aquifer in Groundwater Management Area 12
GR10-060_MAG 7/9/2012 GAM run - MAG Modeled available groundwater for the Yegua-Jackson Aquifer in Groundwater Management Area 12
GR13-002_MP 3/21/2013 GAM run - Management Plan Management plan data for Fayette County GCD
GR13-024_MP 8/28/2013 GAM run - Management Plan Management plan data for Mid-East Texas GCD
GR14-005_MP 3/26/2014 GAM run - Management Plan Management Plan data for Brazos Valley GCD
GT13-035_TERS_Ver2 5/16/2014 GAM task - Total Estimated Recoverable Storage Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 12
GR03-026 9/8/2003 GAM run Predictive run using pumping distribution provided by Post Oak Savannah GCD
GR16-014_MP 3/17/2017 GAM run - Management Plan Management plan information for Lost Pines GCD
GR17-019_MP 2/2/2018 GAM run - Management Plan Management plan information for Fayette County GCD
GR18-019_MP 7/6/2018 GAM run - Management Plan Management plan information for Brazos Valley GCD
GR18-021_MP 1/25/2019 GAM run - Management Plan Management plan information for Brazos Valley GCD
GR18-020_MP 2/11/2019 GAM run - Management Plan Management plan information for Mid-East Texas GCD
GR22-007_MP 6/28/2022 GAM run - Management Plan Management plan information for Post Oak Savannah GCD
GR22-008_MP 8/12/2022 GAM run - Management Plan Management plan information for Lost Pines GCD
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