Upper Brushy Creek Ws Scs Site 9 Dam Reservoir Report

Last Updated: December 5, 2025

Located in Round Rock, Texas, the Upper Brushy Creek WS SCS Site 9 Dam stands as a vital structure designed by the USDA NRCS to address flood risk reduction along Rattan Creek.


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Summary

Completed in 1959, this earth dam measures 36 feet in height and stretches 3,265 feet in length, providing a storage capacity of 3,202 acre-feet for the surrounding area. With a primary purpose of flood risk reduction, the dam also serves fire protection and stock or small fish pond needs.

Managed by the local government and regulated by the Texas Commission on Environmental Quality (TCEQ), the Upper Brushy Creek WS SCS Site 9 Dam boasts a satisfactory condition assessment as of June 2014. The dam features uncontrolled spillways and outlet gates for operational efficiency, with a maximum discharge rate of 18,373 cubic feet per second. Despite being modified in 2005 for structural improvements, the dam continues to meet regulatory standards and plays a crucial role in managing water resources in Williamson County.

Overall, the Upper Brushy Creek WS SCS Site 9 Dam represents a key infrastructure project in Texas, offering flood protection, water storage, and environmental benefits to the local community. With a moderate risk assessment score and regular inspection schedules in place, the dam serves as a valuable asset in ensuring the safety and sustainability of water resources in the region. As climate change impacts intensify, the importance of well-maintained dams like this one becomes increasingly evident for mitigating flood risks and enhancing water management efforts.

Years Modified

2005 - Structural

Year Completed

1959

Dam Length

3265

Dam Height

36

River Or Stream

RATTAN CREEK

Primary Dam Type

Earth

Surface Area

34.4

Hydraulic Height

36

Drainage Area

4.48

Nid Storage

3202

Structural Height

36

Outlet Gates

Slide (sluice gate) - 1, Uncontrolled - 2

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

36
       
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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.