Timberlake Phase 5 Reservoir Report

Last Updated: December 26, 2025

Timberlake Phase 5 is a concrete dam located in Tarrant County, Texas, along the TR-BIG BEAR CREEK.


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Summary

Completed in 1995, this structure serves a variety of purposes and has a maximum storage capacity of 37 acre-feet. With a surface area of 2.8 acres and a drainage area of 0.8 square miles, the dam stands at a height of 12 feet and has a length of 350 feet.

Managed and regulated by the Texas Commission on Environmental Quality (TCEQ), Timberlake Phase 5 has been inspected regularly, with the most recent assessment in December 2017 rating its condition as fair. The dam features an uncontrolled spillway and is equipped with outlet gates for water release. While the hazard potential is not available, the risk assessment categorizes the structure as moderate, with a risk level of 3 out of 5.

For water resource and climate enthusiasts, Timberlake Phase 5 offers a fascinating study in dam design and management. Its location, dimensions, and regulatory oversight provide valuable insights into the challenges and considerations involved in maintaining water infrastructure in a dynamic environment. The dam's history, purpose, and risk assessment add layers of complexity to the ongoing dialogue about water resource management and climate resilience in the region.

Year Completed

1995

Dam Length

350

Dam Height

12

River Or Stream

TR-BIG BEAR CREEK

Primary Dam Type

Concrete

Surface Area

2.8

Hydraulic Height

12

Drainage Area

0.8

Nid Storage

37

Structural Height

12

Outlet Gates

Uncontrolled - 2, Valve - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

12
       
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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.