Groundwater Management Area 13
Groundwater Management Area 13 Webpage
Contact Information
Guadalupe County Groundwater Conservation District
Kelley Cochran
P.O. Box 1221
Seguin, TX 78156
Phone: 830-379-5969
Email: kelley@gcgcd.org
Regional Water Planning Group Representatives:
Region L: Darrell Brownlow, Evergreen UWCD
Region M: Debbie Farmer, Wintergarden GCD
Region N: Lonnie Stewart, McMullen GCD
2021 Joint Planning Desired future conditions and modeled available groundwater
Summary of Desired Future Conditions for GMA 13
Summary of Modeled Available Groundwater for GMA 13 by Groundwater Conservation District
Summary of Modeled Available Groundwater for GMA 13 by County
Groundwater Conservation Districts (8 either partially or completely included)
- Evergreen Underground Water Conservation District
- Gonzales County Underground Water Conservation District
- Guadalupe County Groundwater Conservation District
- McMullen Groundwater Conservation District
- Medina County Groundwater Conservation District
- Plum Creek Conservation District
- Uvalde County Underground Water Conservation District
- Wintergarden Groundwater Conservation District
Other Districts
- Edwards Aquifer Authority
Additional Groundwater Conservation District Information
Exempt Groundwater Use Estimates
Aquifers(either partially or completely included)
Major Aquifers
Minor Aquifers
Component Counties
GMA 13 Reports
| ID | Date | Type | Description |
|---|---|---|---|
| GR19-013_MP | 4/30/2019 | GAM run - Management Plan | Management Plan information for Evergreen UWCD |
| GR17-027_MAG | 10/27/2017 | GAM run - MAG | Modeled available groundwater for the aquifers in Groundwater Management Area 13 |
| R-365 | 2/1/2006 | TWDB numbered report | Aquifers of the Gulf Coast of Texas |
| R-236 | 7/1/1979 | TWDB numbered report | Stratigraphic and Hydrogeologic Framework of Part of the Coastal Plain of Texas |
| B-6520 | 8/1/1965 | Groundwater bulletin | Ground-Water Resources of La Salle and McMullen Counties, Texas |
| LP-214 | 2/1/1995 | Limited publication | Evaluation of Ground-Water Quality in Texas Counties Bordering the Rio Grande |
| 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 |
| R-332 | 9/1/1991 | TWDB numbered report | Ground-Water Resources of the Carrizo-Wilcox Aquifer in the Central Texas Region |
| GMA13_DFC_01 | 4/9/2010 | DFC submission | Desired future conditions for the Carrizo-Wilcox, Queen City, and Sparta aquifers |
| GMA13_DFC_02 | 8/12/2010 | DFC submission | Desired future conditions for the Edwards and Yegua-Jackson aquifers |
| B-6212 | 7/1/1962 | Groundwater bulletin | Geology and Ground-Water Resources of Uvalde County, Texas |
| B-6003 | 6/1/1960 | Groundwater bulletin | Geology and Ground-Water Resources of Dimmit County, Texas |
| B-5911 | 10/1/1959 | Groundwater bulletin | Ground-Water Geology of Bexar County, Texas |
| B-5710 | 7/1/1957 | Groundwater bulletin | Ground-Water Geology of Wilson County, Texas |
| R-019 | 3/1/1966 | TWDB numbered report | Ground-Water Resources of Guadalupe County, Texas |
| R-012 | 9/1/1975 | TWDB numbered report | Ground-Water Resources of Caldwell County, Texas |
| R-004 | 11/1/1965 | TWDB numbered report | Ground-Water Resources of Gonzales County, Texas |
| R-340 | 7/1/1992 | TWDB numbered report | Model Refinement and Applications for the Edwards (Balcones Fault Zone) Aquifer in the San Antonio Region, 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) |
| B-5601 | 8/1/1956 | Groundwater bulletin | Geology and Ground-Water Resources of Medina County, Texas |
| R-032 | 12/1/1966 | TWDB numbered report | Ground-Water Resources of Atascosa and Frio Counties, Texas |
| R-296 | 11/1/1986 | TWDB numbered report | Carbonate Geology and Hydrology of the Edwards Aquifer in the San Antonio Area, Texas |
| R-180 | 3/1/1974 | TWDB numbered report | Reconnaissance of the Chemical Quality of Surface Waters of the Rio Grande Basin, Texas |
| GMA13_DFC_03 | 7/13/2011 | DFC submission | Desired future conditions for the Leona Gravel Aquifer |
| GT10-020 | 11/22/2010 | GAM task | Depth to aquifer layers for the Carrizo-Wilcox, Queen City, and Sparta aquifers in McMullen County |
| GR10-024_MP | 8/18/2010 | GAM run - Management Plan | Management plan information for Wintergarden GCD |
| GT10-012 | 9/9/2010 | GAM task | Predictive simulations for the Yegua-Jackson Aquifer |
| GR10-022_MP | 7/9/2010 | GAM run - Management Plan | Management plan information for Uvalde County UWCD |
| GR10-015_MP | 6/15/2010 | GAM run - Management Plan | Management plan information for Evergreen UWCD |
| GR09-034 | 6/29/2010 | GAM run | Predictive simulations for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 13 |
| GR09-031_MP | 7/9/2010 | GAM run - Management Plan | Management plan information for Medina County GCD |
| GR09-004 | 6/29/2010 | GAM run | Predictive simulations for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 13 |
| GR08-067_MP | 9/3/2008 | GAM run - Management Plan | Management plan information for the Edwards Aquifer Authority |
| GR08-062_MP | 9/3/2008 | GAM run - Management Plan | Management plan information for Evergreen UWCD |
| GR08-043 | 9/19/2008 | GAM run | Predictive simulation for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 13 |
| GR08-043_CM | 9/29/2008 | GAM run | Average drawdowns by county for GAM Runs 08-41, 08-42, and 08-43 in Groundwater Management Area 13 |
| GR08-042 | 9/12/2008 | GAM run | Predictive simulation for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 13 |
| GR08-041 | 9/17/2008 | GAM run | Predictive simulation for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 13 |
| GR08-002_MP | 4/10/2008 | GAM run - Management Plan | Management plan information for McMullen GCD |
| GR07-025_MP | 9/6/2007 | GAM run - Management Plan | Management plan information for Guadalupe GCD |
| GR07-017 | 9/28/2007 | GAM run | Predictive simulation for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 13 |
| GR07-016 | 6/26/2007 | GAM run | Predictive simulation for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 13 |
| GR06-029 | 1/11/2007 | GAM run | Predictive simulation for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 13 |
| GR06-029_CM | 11/8/2011 | GAM run | Average drawdowns for the Carrizo-Wilcox, Queen City, and Sparta aquifers based on the analysis completed in GAM Run 06-029 |
| GR06-018_MP | 8/2/2006 | GAM run - Management Plan | Management plan information for Plum Creek Conservation District |
| GR05-036_MP | 11/28/2005 | GAM run - Management Plan | Management plan information for McMullen GCD |
| GR05-034_MP | 9/8/2005 | GAM run - Management Plan | Management plan information for Wintergarden GCD |
| GR05-030 | 7/15/2005 | GAM run | Recharge information for the Carrizo-Wilcox, Edwards-Trinity (Plateau) and Trinity aquifers in Uvalde County |
| GR05-031 | 7/21/2005 | GAM run | Recharge information for the Carrizo-Wilcox and Trinity aquifers in Medina County |
| GR05-028 | 7/20/2005 | GAM run | Recharge information for the Queen City and Sparta aquifers in Dimmit, La Salle, and Zavala counties |
| GR05-028_Add | 7/25/2005 | GAM run | Water budget information for the Queen City and Sparta aquifers in Dimmit, La Salle, and Zavala counties |
| GR11-017_MP | 11/29/2011 | GAM run - Management Plan | Management plan information for Guadalupe GCD |
| GR05-018 | 4/29/2005 | GAM run | Water budget information for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Bee, Live Oak, and McMullen counties |
| GR03-027 | 9/22/2003 | GAM run | Water budget and total storage above 4000 depth in Evergreen UWCD |
| GR03-012 | 7/18/2003 | GAM run | Water budget, storage, and drawdown in 2050 for the Trinity (Hill Country) and Carrizo-Wilcox aquifers in Medina County GCD |
| GR10-041_MAG | 12/7/2011 | GAM run - MAG | Modeled available groundwater estimates for the Yegua-Jackson Aquifer in Groundwater Management Area 13 |
| GR11-007 | 6/12/2012 | GAM run | Estimated drawdown under assumed future pumping for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 13 |
| GR11-007_Add | 6/12/2012 | GAM run | Drawdown maps and water budget for GAM run 11-007 |
| GR09-034_Add | 6/27/2012 | GAM run | Predictive simulations for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 13 |
| GR12-011_MP | 6/25/2012 | GAM run - Management Plan | Management plan information for McMullen GCD |
| GR12-001_MP | 7/2/2012 | GAM run - Management Plan | Management plan data for Plum Creek CD |
| GR10-012_MAG | 8/2/2012 | GAM run - MAG | Modeled available groundwater for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 13 |
| AA10-40_MAG | 8/20/2012 | Aquifer assessment MAG | Modeled available groundwater for the Edwards Aquifer in Frio County |
| AA10-41_MAG | 8/20/2012 | Aquifer assessment MAG | Modeled available groundwater for the Leona Gravel Aquifer in Medina County |
| GR08-022_MP_Ver2 | 8/14/2008 | GAM run - Management Plan | Management plan information for Gonzales County UWCD |
| GR13-014_MP | 6/25/2013 | GAM run - Management Plan | Management Plan data for Gonzales County UWCD |
| GT13-036_TERS_Ver2 | 7/15/2013 | GAM task - Total Estimated Recoverable Storage | Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 13 |
| AA14-01 | 3/20/2014 | Aquifer assessment | Total Estimated Recoverable Storage for the Leona Gravel in Medina County |
| GR15-009_MP | 3/18/2015 | GAM run - Management Plan | Management Plan data for Edwards Aquifer Authority |
| GR15-002_MP | 6/30/2015 | GAM run - Management Plan | Management plan data for Medina County GCD |
| GR15-004_MP | 6/30/2015 | GAM run - Management Plan | Management Plan data for Evergreen UWCD |
| GR15-006_MP | 6/26/2015 | GAM run - Management Plan | Management Plan data for Uvalde County UWCD |
| GR15-007_MP | 7/29/2015 | GAM run - Management Plan | Management Plan data for Wintergarden GCD |
| GR17-011_MP | 11/20/2017 | GAM run - Management Plan | Management plan information for McMullen GCD |
| GR18-006_MP | 4/9/2018 | GAM run - Management Plan | Management plan information for Gonzales County UWCD |
| GR20-003_MP | 8/25/2020 | GAM run - Management Plan | Management plan information for Medina County GCD |
| GR20-004_MP | 9/30/2020 | GAM run - Management Plan | Management plan information for Wintergarden GCD |
| GR21-018_MAG | 7/25/2022 | GAM run - MAG | Modeled available groundwater for the aquifers in GMA 13 |
| GR23-015_MP | 07/28/2023 | GAM run - Management Plan | Management plan information for McMullen GCD |
| GR23-018_MP | 10/09/2023 | GAM run - Management Plan | Management plan information for Gonzales County UWCD |