Thompson Tank Dam Reservoir Report
Nearby: Mcdaniels Dam Smyth Dam
Last Updated: December 12, 2025
Thompson Tank Dam, located in Uvalde County, Texas, serves multiple purposes including fire protection, stock watering, and small fish pond management.
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Summary
Constructed in 1952, this earth-filled dam stands at a height of 30 feet and spans a length of 1075 feet, with a storage capacity of 220 acre-feet. Situated on the TR-Nueces River, this privately owned structure plays a crucial role in water resource management in the region.
Despite its importance, Thompson Tank Dam has not been rated for its condition assessment and is classified as having a high risk potential. The dam does not have a spillway and is not regulated by the state, but is subject to inspections and permitting requirements. With no associated structures and limited information on its design and construction, the dam remains a key feature in the local landscape and a valuable asset for water supply and conservation efforts in the area.
With its unique design and historic significance, Thompson Tank Dam represents an essential part of the water infrastructure in Uvalde County. As water resource and climate enthusiasts, understanding the role and condition of such structures is vital for ensuring the safety and sustainability of our water supply systems. Thompson Tank Dam stands as a testament to the importance of maintaining and monitoring our water resources for the benefit of both current and future generations.
Year Completed |
1952 |
Dam Length |
1075 |
Dam Height |
30 |
River Or Stream |
TR-NUECES RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
30 |
Nid Storage |
220 |
Structural Height |
30 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Nueces Rv Bl Uvalde
|
1cfs |
Leona Rv Nr Uvalde
|
0cfs |
Frio Rv Bl Dry Frio Rv Nr Uvalde
|
0cfs |
Nueces Rv At Laguna
|
53cfs |
Dry Frio Rv Nr Reagan Wells
|
30cfs |
Nueces Rv At Cr 414 At Montell
|
32cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Thompson Tank Dam