Sister Grove Creek Ws Scs Site 31 Dam Reservoir Report

Last Updated: December 5, 2025

Sister Grove Creek WS SCS Site 31 Dam, located in Grayson County, Texas, is a key flood risk reduction structure designed by the USDA NRCS in 1957.


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Summary

With a dam height of 45 feet and a length of 1875 feet, this Earth-type structure plays a crucial role in protecting the surrounding area from potential flooding events. The dam has a storage capacity of 1481 acre-feet and covers a drainage area of 3.25 square miles along the TR-Sister Grove Creek.

Managed by the local government and regulated by the Texas Commission on Environmental Quality (TCEQ), the dam is recognized for its high hazard potential. Despite lacking certain condition ratings and emergency preparedness assessments, the structure remains a vital component in the region's water resource management infrastructure. The absence of a spillway and limited outlet gates suggest a need for ongoing monitoring and maintenance to ensure the dam's effectiveness in flood control.

As water resource and climate enthusiasts explore the Sister Grove Creek WS SCS Site 31 Dam, they gain insights into the intricate balance between flood risk reduction, storage capacity, and structural integrity. With a history dating back to the mid-20th century, this earth dam stands as a testament to the collaborative efforts of regulatory agencies, designers, and local authorities in safeguarding communities against the impacts of extreme weather events. As climate change continues to pose new challenges, the resilience of such infrastructure plays a critical role in ensuring water security for future generations.

Year Completed

1957

Dam Length

1875

Dam Height

45

River Or Stream

TR-SISTER GROVE CREEK

Primary Dam Type

Earth

Surface Area

28.4

Hydraulic Height

45

Drainage Area

3.25

Nid Storage

1481

Structural Height

45

Outlet Gates

None - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

45
       
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.