East Fork Above Lavon Ws Scs Site 32 Dam Reservoir Report

Last Updated: December 5, 2025

East Fork Above Lavon WS SCS Site 32 Dam is a crucial structure located in MCKINNEY, Texas, serving as a flood risk reduction measure along the TR-EAST FORK TRINITY RIVER.


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Summary

Built in 1966 by the USDA NRCS, this Earth-type dam stands at a height of 39 feet and spans a length of 1350 feet, with a storage capacity of 700 acre-feet. The dam also serves purposes such as fire protection, stock, small fish pond, and recreation, highlighting its versatile role in water resource management.

Managed by the local government and regulated by the Texas Commission on Environmental Quality (TCEQ), East Fork Above Lavon WS SCS Site 32 Dam has been assessed to be in fair condition as of April 2021. The dam features an uncontrolled spillway and outlet gates for efficient water release during periods of high discharge. Despite a moderate risk assessment, with a hazard potential not available, the dam continues to play a vital role in mitigating flood risks and ensuring water supply stability in the region.

As a significant component of the water infrastructure in Collin County, Texas, East Fork Above Lavon WS SCS Site 32 Dam stands as a testament to effective water resource management and engineering. With a history of serving the community for over five decades, the dam remains a key asset for flood control, water supply, and recreational activities, showcasing the importance of sustainable water management practices in the face of changing climate patterns.

Year Completed

1966

Dam Length

1350

Dam Height

39

River Or Stream

TR-EAST FORK TRINITY RIVER

Primary Dam Type

Earth

Surface Area

7.6

Hydraulic Height

39

Drainage Area

1.3

Nid Storage

700

Structural Height

39

Outlet Gates

Slide (sluice gate) - 1, Uncontrolled - 2

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

39
       
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.