Sister Grove Creek Ws Scs Site 15 Dam Reservoir Report

Last Updated: December 5, 2025

Sister Grove Creek WS SCS Site 15 Dam, located in Collin, Texas, is a vital structure designed by the USDA NRCS to serve the purpose of flood risk reduction along the TR-Elm Grove Creek.


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Summary

Completed in 1959, this earth dam stands at a height of 28 feet and spans a length of 753 feet, providing a storage capacity of 231 acre-feet to help manage water flow and protect the surrounding area from potential flooding.

Managed by the local government and regulated by the Texas Commission on Environmental Quality (TCEQ), this dam plays a crucial role in ensuring the safety and well-being of the community. Despite not having a spillway, the dam's design and construction by the Natural Resources Conservation Service demonstrate a commitment to effective water resource management and hazard mitigation. With a high-risk assessment rating, the need for regular inspections and maintenance is highlighted to uphold the dam's structural integrity and functionality.

As a key component in the region's water infrastructure, Sister Grove Creek WS SCS Site 15 Dam not only assists in flood risk reduction but also serves other purposes such as fire protection, stock or small fish pond, and recreation. With a focus on addressing potential hazards and ensuring proper risk management, this dam stands as a testament to the importance of sustainable water resource management in the face of changing climate conditions.

Year Completed

1959

Dam Length

753

Dam Height

28

River Or Stream

TR-ELM GROVE CREEK

Primary Dam Type

Earth

Surface Area

6.4

Hydraulic Height

28

Drainage Area

0.44

Nid Storage

231

Structural Height

28

Outlet Gates

None - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

28
       
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.