Muralla Tank Dam Reservoir Report
Last Updated: December 5, 2025
Located in Duval, Texas, the Muralla Tank Dam stands as a vital structure for water supply in the region.
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Summary
Completed in 1969, this earth dam with a height of 20 feet and a length of 1000 feet serves the primary purpose of water supply. The dam is situated on the San Diego Creek and has a storage capacity of 256 acre-feet, with a normal storage level of 128 acre-feet.
Despite its importance for water resource management, the Muralla Tank Dam does not have a spillway and is not regulated by the state. The risk assessment for the dam is rated as high, highlighting the need for careful monitoring and maintenance. With no recent inspection data available, it is crucial for authorities to ensure the safety and integrity of this key water infrastructure in the face of changing climate patterns and water resource demands.
Year Completed |
1969 |
Dam Length |
1000 |
Dam Height |
20 |
River Or Stream |
SAN DIEGO CREEK |
Primary Dam Type |
Earth |
Surface Area |
16 |
Hydraulic Height |
20 |
Nid Storage |
256 |
Structural Height |
20 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
San Fernando Ck At Alice
|
1cfs |
Lagarto Ck Nr George West
|
0cfs |
Nueces Rv Nr Mathis
|
27cfs |
Nueces Rv At Bluntzer
|
0cfs |
Tranquitas Ck At Kingsville
|
0cfs |
Nueces Rv Nr Tilden
|
0cfs |
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.
Muralla Tank Dam