East Fork Above Lavon Ws Scs Site 34 Dam Reservoir Report

Last Updated: December 5, 2025

The East Fork Above Lavon WS SCS Site 34 Dam, located in McKinney, Texas, is a key flood risk reduction structure designed by the USDA NRCS and completed in 1966.


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Summary

With a height of 46 feet and a length of 1180 feet, this earth dam plays a critical role in protecting the surrounding area from potential flooding events along the TR-East Fork Trinity River. The dam has a normal storage capacity of 127 acre-feet and a maximum storage capacity of 567 acre-feet, serving multiple purposes such as fire protection, irrigation, and recreation in addition to flood risk reduction.

Managed by the TCEQ and with state jurisdiction, the East Fork Above Lavon WS SCS Site 34 Dam is subject to regular inspections and enforcement measures to ensure its structural integrity and safety. The dam features a slide gate outlet for water control and does not have a spillway, highlighting its unique design for handling water flow. Although the hazard potential and condition assessment are not available, the dam's risk assessment is classified as high, indicating the importance of ongoing monitoring and risk management measures for this critical infrastructure. With its strategic location and significant impact on the local water resources, the East Fork Above Lavon WS SCS Site 34 Dam stands as a vital asset in the region's water resource and climate resilience efforts.

Year Completed

1966

Dam Length

1180

Dam Height

46

River Or Stream

TR-EAST FORK TRINITY RIVER

Primary Dam Type

Earth

Surface Area

40

Hydraulic Height

46

Drainage Area

1.1

Nid Storage

567

Structural Height

46

Outlet Gates

Slide (sluice gate) - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

46
       
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.