Duval Dam East Reservoir Report

Last Updated: December 5, 2025

Located in Travis County, Texas, Duval Dam East is a Roller-Compacted Concrete structure designed by FREESE AND NICHOLS in 1984 for the primary purpose of Flood Risk Reduction along the Walnut Creek.


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Summary

Standing at 36 feet tall and 525 feet long, this dam has a storage capacity of 165 acre-feet and a maximum discharge of 55 cubic feet per second. With uncontrolled spillways and 2 outlet gates, the dam has been deemed to be in fair condition as of the most recent assessment in April 2021.

Managed by local government authorities and regulated by the Texas Commission on Environmental Quality (TCEQ), Duval Dam East plays a crucial role in mitigating flood risks in the region and ensuring the safety of nearby communities. While its hazard potential is listed as not available, the dam is subject to regular inspections every 5 years to assess its structural integrity and functionality. With a moderate risk rating of 3, the dam serves as a vital infrastructure for water resource management and climate resilience efforts in the area, showcasing the importance of proactive risk management measures in safeguarding against potential emergencies.

Year Completed

1984

Dam Length

525

Dam Height

36

River Or Stream

WALNUT CREEK

Primary Dam Type

Roller-Compacted Concrete

Hydraulic Height

36

Drainage Area

1.48

Nid Storage

165

Structural Height

36

Outlet Gates

Uncontrolled - 2

Hazard Potential

Not Available

Foundations

Rock, Soil

Nid Height

36
       
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.