Upper Brushy Creek Ws Scs Site 11 Dam Reservoir Report

Last Updated: December 5, 2025

Upper Brushy Creek WS SCS Site 11 Dam, located in Round Rock, Texas, is a local government-owned structure designed by USDA NRCS to serve the primary purpose of flood risk reduction along the Chandler Branch.


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Summary

Completed in 1967, this earth dam stands at a height of 41 feet and has a length of 2600 feet, providing a storage capacity of 5844 acre-feet and a drainage area of 8.16 square miles.

With a spillway width of 403 feet and a maximum discharge capacity of 39,619 cubic feet per second, this dam has undergone modifications in 2005 to enhance its hydraulic capabilities. The dam features an uncontrolled spillway and outlet gates for efficient water management. Inspected regularly and deemed in satisfactory condition as of June 2014, the dam poses a moderate risk level and has an established Emergency Action Plan to ensure public safety in case of emergencies.

Overall, Upper Brushy Creek WS SCS Site 11 Dam plays a crucial role in mitigating flood risks and protecting the surrounding area from potential water hazards. Its strategic design and efficient operation make it a significant asset in water resource management and climate resilience efforts in Williamson County, Texas.

Years Modified

2005 - Hydraulic, 2005 - Other

Year Completed

1967

Dam Length

2600

Dam Height

41

River Or Stream

CHANDLER BRANCH

Primary Dam Type

Earth

Surface Area

45

Hydraulic Height

41

Drainage Area

8.16

Nid Storage

5844

Structural Height

41

Outlet Gates

Slide (sluice gate) - 1, Uncontrolled - 2

Hazard Potential

Not Available

Foundations

Rock, Soil

Nid Height

41
       
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.