Lantana Regional Detention Dam Reservoir Report

Last Updated: December 5, 2025

Lantana Regional Detention Dam, located in Travis County, Texas, stands as a testament to effective water resource management and climate resiliency.


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Summary

Constructed in 1996 by LONGARO & CLARK INC, this private-owned Earth dam is designed to manage the flow of the tributary Williamson Creek during heavy rainfall events. With a height of 28.1 feet and a length of 825 feet, the dam has a storage capacity of 189 acre-feet and a maximum discharge rate of 262 cubic feet per second.

The dam's uncontrolled spillway, with a width of 761 feet, ensures the safe release of excess water to prevent overflow and flooding. Regular inspections have deemed the dam's condition as fair, with a moderate risk assessment rating. The Texas Commission on Environmental Quality (TCEQ) regulates the dam's operations, inspections, and enforcement, highlighting the commitment to safety and environmental stewardship in the region.

Overall, Lantana Regional Detention Dam serves as a vital infrastructure asset in managing water resources and mitigating flood risks in the area. Its strategic design and regulatory oversight demonstrate a proactive approach to climate resilience and sustainable water management practices, making it a standout example for water resource and climate enthusiasts alike.

Year Completed

1996

Dam Length

825

Dam Height

28.1

River Or Stream

TRIBUTARY WILLIAMSON CREEK

Primary Dam Type

Earth

Hydraulic Height

28.1

Nid Storage

189

Structural Height

28.1

Outlet Gates

Uncontrolled - 3

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

28
       
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.