Retama Tank Dam Reservoir Report

Last Updated: December 5, 2025

Retama Tank Dam, located in McMullen, Texas, serves as a vital water supply infrastructure in the region.


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Summary

Completed in 1969, this earth dam stands at a height of 15 feet and spans a length of 470 feet, with a storage capacity of 143 acre-feet. The dam is primarily designed for water supply purposes, drawing water from the TR-Guadalupe Creek to meet the needs of the local community.

Despite its essential role in water resource management, Retama Tank Dam currently lacks a spillway, which may pose a potential hazard in case of heavy rainfall or flooding events. Its condition assessment remains unrated, highlighting the need for regular inspections and maintenance to ensure its safety and functionality. With a high risk rating of 2, there is a pressing need for risk management measures to be implemented to safeguard the dam and the surrounding area from any potential threats.

As water resource and climate enthusiasts, it is crucial to monitor and support initiatives that enhance the resilience of dams like Retama Tank Dam in the face of changing environmental conditions. By advocating for proper maintenance, risk assessment, and emergency preparedness measures, we can contribute towards ensuring the sustainable management of water resources and the protection of communities relying on these critical infrastructures.

Year Completed

1969

Dam Length

470

Dam Height

15

River Or Stream

TR-GUADALUPE CREEK

Primary Dam Type

Earth

Surface Area

13

Hydraulic Height

15

Nid Storage

143

Structural Height

15

Outlet Gates

None - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

15
       
Seasonal Comparison

Weather Forecast

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.