Little Elm And Laterals Ws Scs Site 9 Dam Reservoir Report

Last Updated: December 5, 2025

The Little Elm and Laterals WS SCS Site 9 Dam, located in Collin, Texas, serves as a critical structure for flood risk reduction along the TR-CLARKS BRANCH river system.


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Summary

Built in 1971 by the USDA NRCS, this earth dam stands at a height of 24 feet and spans a length of 1180 feet, providing a storage capacity of 340 acre-feet. The dam's primary purpose is flood risk reduction, but it also supports fire protection, stock watering, and recreational activities in the area.

Managed by the Natural Resources Conservation Service, the Little Elm and Laterals WS SCS Site 9 Dam is regulated and permitted by the Texas Commission on Environmental Quality (TCEQ). With a moderate risk assessment rating of 3, the dam has not been rated for condition assessment and does not have an Emergency Action Plan in place. Despite its uncontrolled spillway type and limited discharge capacity, the dam plays a crucial role in protecting the surrounding community from potential flooding events.

As water resource and climate enthusiasts, the technical specifications and operational details of the Little Elm and Laterals WS SCS Site 9 Dam provide valuable insight into its role in safeguarding the local environment and residents. With ongoing inspections and regulatory oversight, this dam continues to contribute to the overall water management strategies in Collin, Texas, highlighting the importance of infrastructure for sustainable water resource management in the region.

Year Completed

1971

Dam Length

1180

Dam Height

24

River Or Stream

TR-CLARKS BRANCH

Primary Dam Type

Earth

Surface Area

14

Hydraulic Height

24

Drainage Area

0.58

Nid Storage

340

Structural Height

24

Outlet Gates

Slide (sluice gate) - 1, Uncontrolled - 2

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

24
       
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.