East Fork Above Lavon Ws Scs Site 47 Dam Reservoir Report

Last Updated: December 5, 2025

East Fork Above Lavon WS SCS Site 47 Dam, located in Collin County, Texas, serves as a crucial flood risk reduction structure along Throckmorton Creek.


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Summary

Built in 1960 by the USDA NRCS, this earth dam stands at a height of 49 feet and spans 2972 feet in length, providing a maximum storage capacity of 1774 acre-feet. The dam also offers additional benefits such as fire protection, recreational opportunities, and stock or small fish pond maintenance for the local community.

Despite being classified as having a fair condition assessment, the dam is regularly inspected by the Texas Commission on Environmental Quality (TCEQ) to ensure its safety and regulatory compliance. With a moderate risk rating, the dam has a spillway width of 116 feet and is equipped with slide and uncontrolled outlet gates to manage water flow during heavy rainfall events. The dam's emergency action plan status, risk management measures, and inundation maps are currently not available, highlighting the need for continued monitoring and preparedness in the face of potential hazards.

As a vital infrastructure for flood control and water resource management in the region, the East Fork Above Lavon WS SCS Site 47 Dam underscores the importance of sustainable dam operations and risk mitigation strategies. With a proactive approach to maintenance and emergency planning, this dam plays a critical role in safeguarding the surrounding community from water-related disasters and enhancing the overall resilience of the local ecosystem in the face of a changing climate.

Year Completed

1960

Dam Length

2972

Dam Height

49

River Or Stream

THROCKMORTON CREEK

Primary Dam Type

Earth

Surface Area

25.6

Hydraulic Height

49

Drainage Area

3.36

Nid Storage

1774

Structural Height

49

Outlet Gates

Slide (sluice gate) - 1, Uncontrolled - 2

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

49
       
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.