Tehuacana Creek Ws Scs Site 18 Dam Reservoir Report

Last Updated: December 5, 2025

Located in McLennan County, Texas, the Tehuacana Creek WS SCS Site 18 Dam is a vital structure designed by the USDA NRCS for flood risk reduction along the TR-Little Tehuacana Creek.


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Summary

Completed in 1969, this earth dam stands at a height of 33 feet and stretches 4500 feet in length, providing a maximum storage capacity of 1534 acre-feet. With a normal storage of 141 acre-feet and a drainage area of 2.4 square miles, this dam plays a crucial role in mitigating flood risks in the region.

Managed by local government authorities and regulated by the Texas Commission on Environmental Quality (TCEQ), the Tehuacana Creek WS SCS Site 18 Dam is equipped with uncontrolled spillways and outlet gates for efficient water management. Despite being assessed as in fair condition, with a moderate risk level, the dam has not undergone any recent modifications and is inspected every 5 years to ensure its structural integrity. With a history of serving multiple purposes such as fire protection, stock, or small fish pond, the dam remains a key component of the water resource infrastructure in the area.

With its strategic location and significant contribution to flood risk reduction, the Tehuacana Creek WS SCS Site 18 Dam stands as a testament to effective water resource management in Texas. As climate change continues to impact the region, this dam serves as a crucial line of defense against potential disasters, highlighting the importance of ongoing inspection and maintenance to ensure its continued functionality. For water resource and climate enthusiasts, this dam represents a beacon of resilience and preparedness in the face of environmental challenges.

Year Completed

1969

Dam Length

4500

Dam Height

33

River Or Stream

TR-LITTLE TEHUACANA CREEK

Primary Dam Type

Earth

Surface Area

28

Hydraulic Height

33

Drainage Area

2.4

Nid Storage

1534

Structural Height

33

Outlet Gates

Slide (sluice gate) - 1, Uncontrolled - 2

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

33
       
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.