Sister Grove Creek Ws Scs Site 2 Dam Reservoir Report

Last Updated: December 5, 2025

Sister Grove Creek WS SCS Site 2 Dam, located in Collin County, Texas, is a key flood risk reduction infrastructure designed by the USDA NRCS in 1960.


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Summary

The dam stands at a height of 34 feet and spans a length of 1715 feet, providing essential protection to the surrounding area from potential flooding events. With a storage capacity of 354 acre-feet, the dam serves multiple purposes including fire protection, stock and small fish pond management, as well as recreational activities.

Managed by the local government and regulated by the Texas Commission on Environmental Quality (TCEQ), the dam is in good condition with a high risk assessment rating of 2. Despite not having a spillway, the dam has a robust structure with a buttress core type and is built primarily from earth materials. The dam plays a crucial role in safeguarding the community and enhancing water resource management in the region, making it a significant asset for water resource and climate enthusiasts to appreciate and study.

As a part of the larger water infrastructure network in the area, Sister Grove Creek WS SCS Site 2 Dam not only contributes to flood risk reduction but also supports sustainable water management practices. With its strategic location on TR-Sister Grove Creek and close proximity to the Tulsa District, the dam underscores the importance of collaboration between government agencies and local communities in ensuring the resilience and safety of water resources in Texas. As climate change continues to impact the region, the dam stands as a testament to proactive measures taken to mitigate potential risks and protect the environment for future generations.

Year Completed

1960

Dam Length

1715

Dam Height

34

River Or Stream

TR-SISTER GROVE CREEK

Primary Dam Type

Earth

Surface Area

8.2

Hydraulic Height

34

Drainage Area

0.73

Nid Storage

354

Structural Height

34

Outlet Gates

None - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

34
       
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.