No 12 Tank Dam Reservoir Report
Nearby: 1500 Tank Dam South Losa Tank Dam
Last Updated: December 6, 2025
No 12 Tank Dam, located in Webb County, Texas, is a private earth dam with a primary purpose of "Other." It stands at a height of 13 feet and has a storage capacity of 237 acre-feet, with a normal storage level of 61 acre-feet.
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Summary
The dam, situated along the TR-SAN LORENZO CREEK, does not have a spillway and is not regulated by the state.
Despite being ungraded in terms of condition assessment, No 12 Tank Dam has been classified as having a high risk potential (2) based on available data. The dam does not have an Emergency Action Plan (EAP) in place, and there is limited information on the dam's risk management measures. With no federal agency oversight or funding, it is crucial for the private owner to prioritize regular inspections and maintenance to ensure the safety and reliability of the structure for water resource and climate enthusiasts in the area.
Dam Height |
13 |
River Or Stream |
TR-SAN LORENZO CREEK |
Primary Dam Type |
Earth |
Surface Area |
19 |
Nid Storage |
237 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
13 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Nueces Rv Nr Asherton
|
0cfs |
Nueces Rv At Cotulla
|
0cfs |
Zacate Ck At Laredo
|
0cfs |
Rio Grande At Laredo
|
1760cfs |
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.
No 12 Tank Dam