Groundwater Management Area 12
Groundwater Management Area 12 Webpage
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
Exempt Groundwater Use Estimates
Aquifers(either partially or completely included)
Major Aquifers
Minor Aquifers
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 |