East Fork Above Lavon Ws Scs Site 20a Dam Reservoir Report

Last Updated: December 5, 2025

East Fork Above Lavon WS SCS Site 20a Dam, located in Grayson County, Texas, is a vital piece of infrastructure designed by the USDA NRCS for flood risk reduction along the Trinity River.


°F

°F

mph

Wind

%

Humidity

Summary

The dam, completed in 1966, stands at a height of 44 feet and spans a length of 2730 feet, with a storage capacity of 3458 acre-feet. This earth dam with buttress core serves as a crucial tool in managing water flow and protecting the surrounding area from potential flooding.

With a drainage area of 6.07 square miles and a maximum discharge capacity of 2865 cubic feet per second, the East Fork Above Lavon WS SCS Site 20a Dam plays a significant role in safeguarding the local community. The dam's spillway, with a width of 132 feet, helps regulate water levels during times of high flow. Despite being classified as in fair condition as of the latest assessment in April 2021, the dam is subject to regular inspections and maintenance to ensure its continued effectiveness in flood risk mitigation.

Managed by local government authorities and regulated by the Texas Commission on Environmental Quality (TCEQ), this dam exemplifies the collaborative effort between state and federal agencies in safeguarding water resources and enhancing climate resilience. The dam's strategic location and structure make it a key asset in the region's water management infrastructure, serving as a critical barrier against potential hazards. As water resource and climate enthusiasts, understanding the importance of structures like the East Fork Above Lavon WS SCS Site 20a Dam is essential in promoting sustainable practices and ensuring the long-term health of our water systems.

Year Completed

1966

Dam Length

2730

Dam Height

44

River Or Stream

TR-EAST FORK TRINITY RIVER

Primary Dam Type

Earth

Surface Area

41

Hydraulic Height

44

Drainage Area

6.07

Nid Storage

3458

Structural Height

44

Outlet Gates

Slide (sluice gate) - 1, Uncontrolled - 2

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

44
       
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.