East Fork Above Lavon Ws Scs Site 33 Dam Reservoir Report

Last Updated: December 5, 2025

Located in Collin, Texas, the East Fork Above Lavon WS SCS Site 33 Dam is a vital structure designed by the USDA NRCS with a primary purpose of flood risk reduction along the TR-EAST FORK TRINITY RIVER.


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Summary

Completed in 1966, this earth dam stands at a height of 37 feet and spans a length of 1902 feet, offering a maximum storage capacity of 780 acre-feet and a normal storage of 146 acre-feet over a surface area of 14.6 acres.

Managed by local government authorities and regulated by the Texas Commission on Environmental Quality (TCEQ), the dam features an uncontrolled spillway with a width of 82 feet, as well as outlet gates for water control. Despite being assessed as in fair condition as of December 2014, the dam is inspected every five years to ensure its continued functionality and safety. While the hazard potential is not available, the risk assessment for this structure is rated as moderate (3), highlighting the importance of ongoing monitoring and maintenance to mitigate any potential risks.

With a history of serving the community by protecting against flooding and managing water resources, the East Fork Above Lavon WS SCS Site 33 Dam remains a crucial asset in safeguarding the surrounding area. Climate and water resource enthusiasts will find interest in the dam's design, operational details, and the collaborative efforts between government agencies to ensure its effective functioning. As climate change continues to impact the region, the resilience and maintenance of such infrastructure play a key role in sustainable water management practices for the future.

Year Completed

1966

Dam Length

1902

Dam Height

37

River Or Stream

TR-EAST FORK TRINITY RIVER

Primary Dam Type

Earth

Surface Area

14.6

Hydraulic Height

37

Drainage Area

1.3

Nid Storage

780

Structural Height

37

Outlet Gates

Slide (sluice gate) - 2, Uncontrolled - 2

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

37
       
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.