Big Tank No 2 Dam Reservoir Report

Last Updated: December 5, 2025

Big Tank No 2 Dam, located in Webb County, Texas, is a privately owned Earth type dam that was completed in 1979.


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Summary

This dam stands at a height of 14 feet and has a length of 740 feet, with a storage capacity of 1008 acre-feet. The primary purpose of this dam is listed as "Other," with a hazard potential rated as "High (2)."

The dam is situated on the TR-Salado Creek, under the regulatory authority of the Texas Commission on Environmental Quality (TCEQ). While the dam does not have a spillway, it does have one outlet gate. The condition of the dam is currently listed as "Not Rated," indicating that further assessment may be needed. The risk assessment for this dam is also classified as high, highlighting the importance of ongoing monitoring and maintenance to ensure its safety and integrity.

For water resource and climate enthusiasts, the Big Tank No 2 Dam presents an interesting case study in dam construction and management. With its unique design features and high-risk classification, this dam serves as a reminder of the crucial role that infrastructure plays in water resource management and climate resilience. Ongoing inspections and risk management measures will be essential to ensure the safety of this dam and the surrounding community in the face of changing environmental conditions.

Year Completed

1979

Dam Length

740

Dam Height

14

River Or Stream

TR-SALADO CREEK

Primary Dam Type

Earth

Surface Area

78.14

Hydraulic Height

14

Nid Storage

1008

Structural Height

14

Outlet Gates

None - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

14
       
Seasonal Comparison

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Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.