Turkey Tank Dam Reservoir Report

Last Updated: December 5, 2025

Turkey Tank Dam, located in McMullen County, Texas, is a privately owned structure that serves as a vital water supply resource in the region.


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Summary

Completed in 1968, this earth dam stands at 26 feet in height and has a storage capacity of 645 acre-feet. The primary purpose of the dam is to support water supply needs, particularly for the surrounding community.

Managed by the Texas Commission on Environmental Quality (TCEQ), Turkey Tank Dam is regulated, permitted, and inspected by the state to ensure its safety and functionality. While the dam does not have a spillway, it is equipped with one outlet gate for water release. Despite being rated as having a high risk potential, the dam's condition is currently not rated, indicating a need for further assessment and potential risk management measures in the future.

Enthusiasts interested in water resource management and climate adaptation in the region will find Turkey Tank Dam to be a noteworthy structure. With its strategic location on TR-San Miguel Creek and its critical role in providing water supply, this dam showcases the importance of sustainable water infrastructure in supporting local communities and ecosystems. Further monitoring and potential risk mitigation efforts may be needed to ensure the long-term resilience of this essential water resource.

Year Completed

1968

Dam Length

600

Dam Height

26

River Or Stream

TR-SAN MIGUEL CREEK

Primary Dam Type

Earth

Surface Area

18

Hydraulic Height

26

Nid Storage

645

Structural Height

26

Outlet Gates

None - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

26
       
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.