La Frontera Detention Dam Reservoir Report

Last Updated: December 5, 2025

Located in Round Rock, Texas, the La Frontera Detention Dam serves multiple purposes including fire protection, stock, small fish pond, and recreation.


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Summary

Completed in 1958, this privately owned earth dam stands at a height of 39 feet and spans 800 feet in length. With a storage capacity of 75 acre-feet, the dam plays a crucial role in managing the water resources of the TR-LAKE CREEK.

Maintained by the Texas Commission on Environmental Quality (TCEQ), La Frontera Detention Dam has a fair condition assessment as of December 2015. The dam's inspection frequency is set at every 5 years, with the last inspection conducted in February 2015. Despite its modest hazard potential classification, the dam has not yet had an Emergency Action Plan prepared, raising concerns about emergency response preparedness.

In the event of an emergency, the dam is equipped with one other controlled outlet, two uncontrolled outlets, and a valve. The dam's spillway width measures 203 feet, capable of handling a maximum discharge of 2488 cubic feet per second. As a vital structure for water resource management in Williamson County, La Frontera Detention Dam remains a focal point for climate enthusiasts and water resource professionals alike.

Years Modified

2000 - Hydraulic

Year Completed

1958

Dam Length

800

Dam Height

39

River Or Stream

TR-LAKE CREEK

Primary Dam Type

Earth

Surface Area

2

Hydraulic Height

39

Drainage Area

0.18

Nid Storage

75

Structural Height

39

Outlet Gates

Other Controlled - 1, Uncontrolled - 2, Valve - 1

Hazard Potential

Not Available

Foundations

Rock

Nid Height

39
       
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.