Upper Brushy Creek Ws Scs Site 4 Dam Reservoir Report

Last Updated: December 5, 2025

The Upper Brushy Creek WS SCS Site 4 Dam is a crucial structure located in Round Rock, Texas, designed by the USDA NRCS to serve primarily for flood risk reduction purposes.


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Summary

Completed in 1960, this earth dam stands at a height of 53 feet with a hydraulic height and structural height matching that measurement. With a storage capacity of 3,131 acre-feet and a normal storage level of 174 acre-feet, this dam plays a pivotal role in managing the flow of the Spanish Oak Creek.

Managed by the local government and regulated by the Texas Commission on Environmental Quality (TCEQ), the Upper Brushy Creek WS SCS Site 4 Dam has undergone modifications in 2010 to ensure its structural integrity. The dam features uncontrolled spillways, two uncontrolled outlet gates, and one valve, while its condition assessment in June 2017 deemed it satisfactory. With a moderate risk assessment rating of 3, this dam continues to be a vital asset in mitigating flood risks and protecting the surrounding Williamson County community from potential hazards.

Overall, the Upper Brushy Creek WS SCS Site 4 Dam stands as a testament to effective water resource management and climate resilience efforts in Texas. With its strategic location, design features, and regulatory oversight, this dam serves as a critical infrastructure for flood control, fire protection, and stock or small fish pond purposes, showcasing the importance of sustainable water management practices in safeguarding communities against natural disasters and ensuring water security for future generations.

Years Modified

2010 - Structural

Year Completed

1960

Dam Length

2200

Dam Height

53

River Or Stream

SPANISH OAK CREEK

Primary Dam Type

Earth

Surface Area

23

Hydraulic Height

53

Drainage Area

5.43

Nid Storage

3131

Structural Height

53

Outlet Gates

Uncontrolled - 2, Valve - 1

Hazard Potential

Not Available

Foundations

Rock, Soil

Nid Height

53
       
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.