Greenbriar Dam Reservoir Report

Last Updated: December 5, 2025

Greenbriar Dam, located in Tarrant County, Texas, was completed in 1980 and serves as a vital structure for managing water resources in the area.


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Summary

Owned by the local government and regulated by the Texas Commission on Environmental Quality (TCEQ), the dam stands at a height of 11 feet with a hydraulic height of 9 feet. It spans 160 feet in length and has a normal storage capacity of 7 acre-feet, providing essential water storage for the tributary of Sycamore Creek.

With a moderate risk assessment rating, Greenbriar Dam is classified as having a fair condition assessment as of August 2017. It features an uncontrolled spillway type with two uncontrolled and one valve outlet gates. The dam's inspection frequency is set at 5 years, with the most recent inspection conducted in May 2017. Despite its relatively small size, Greenbriar Dam plays a crucial role in water management and flood control efforts in the region, highlighting the importance of maintaining and monitoring such critical infrastructure to ensure public safety and environmental sustainability for years to come.

Year Completed

1980

Dam Length

160

Dam Height

11

River Or Stream

TRIBUTARY OF SYCAMORE CREEK

Primary Dam Type

Earth

Surface Area

7.09

Hydraulic Height

9

Drainage Area

1.05

Nid Storage

11

Structural Height

11

Outlet Gates

Uncontrolled - 2, Valve - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

11
       
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.