East Fork Above Lavon Ws Scs Site 9 Dam Reservoir Report

Last Updated: December 5, 2025

East Fork Above Lavon WS SCS Site 9 Dam is a vital flood risk reduction infrastructure located in McKinney, Texas, along the TR-HONEY CREEK.


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Summary

Built in 1951 by the USDA NRCS, this earth dam stands at a height of 43 feet and spans 1456 feet in length. With a storage capacity of 832 acre-feet and a normal storage of 150 acre-feet, the dam serves multiple purposes including fire protection, stock, or small fish pond, flood risk reduction, and recreation.

Managed by the Texas Commission on Environmental Quality (TCEQ), the East Fork Above Lavon WS SCS Site 9 Dam is classified as fair in condition assessment and has a moderate risk level (3). The dam features an uncontrolled spillway, outlet gates including slide and uncontrolled gates, and is regularly inspected every 5 years. In case of emergencies, the dam has an emergency action plan in place, although details on its preparedness are not available.

With its historical significance and continued role in mitigating flood risks in the region, the East Fork Above Lavon WS SCS Site 9 Dam highlights the importance of proper infrastructure management for water resources and climate enthusiasts. As a key structure in Collin County, Texas, this dam serves as a testament to the collaborative efforts between local governments, regulatory agencies, and design authorities in ensuring the safety and protection of communities along the TR-HONEY CREEK watershed.

Year Completed

1951

Dam Length

1456

Dam Height

43

River Or Stream

TR-HONEY CREEK

Primary Dam Type

Earth

Surface Area

17.1

Hydraulic Height

43

Drainage Area

1.3

Nid Storage

832

Structural Height

43

Outlet Gates

Slide (sluice gate) - 1, Uncontrolled - 2

Hazard Potential

Not Available

Foundations

Rock, Soil

Nid Height

43
       
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.