East Fork Above Lavon Ws Scs Site 1a Dam Reservoir Report

Last Updated: December 5, 2025

Located in McKinney, Texas, the East Fork Above Lavon WS SCS Site 1a Dam stands as a testament to flood risk reduction efforts in the region.


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Summary

Built in 1957 by the USDA NRCS, this earth dam boasts a height of 54 feet and a hydraulic height of 52 feet, with a length of 1200 feet. The dam has a storage capacity of 842 acre-feet, serving as a crucial flood control structure for the surrounding area.

Managed by the local government and regulated by the Texas Commission on Environmental Quality, the East Fork Dam plays a vital role in protecting the community from potential flooding events. With a spillway width of 234 feet and a maximum discharge of 9834 cubic feet per second, the dam is equipped to handle significant water flow during heavy rain periods. Despite being classified as having a moderate risk level, the dam's condition is assessed as satisfactory, ensuring its continued effectiveness in flood mitigation efforts.

Surrounded by the scenic Wilson Creek, the East Fork Dam not only serves a functional purpose but also offers recreational opportunities for locals and visitors alike. With its strategic location and robust design, this dam stands as a symbol of resilience and proactive water resource management in the face of changing climate patterns.

Years Modified

2010 - Other

Year Completed

1957

Dam Length

1200

Dam Height

54

River Or Stream

TR-WILSON CREEK

Primary Dam Type

Earth

Surface Area

13.9

Hydraulic Height

52

Drainage Area

1.15

Nid Storage

842

Structural Height

52

Outlet Gates

Slide (sluice gate) - 1, Uncontrolled - 4

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

54
       
Seasonal Comparison

Weather Forecast

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.