Sister Grove Creek Ws Scs Site 35 Dam Reservoir Report

Last Updated: December 5, 2025

Sister Grove Creek WS SCS Site 35 Dam, located in Grayson County, Texas, was completed in 1959 by the USDA NRCS as a flood risk reduction measure along the TR-East Prong Sister Grove Creek.


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Summary

This earth dam, standing at a height of 37 feet and spanning 1075 feet in length, serves as a vital structure to protect the surrounding area from potential flooding events. With a normal storage capacity of 32 acre-feet and a maximum storage capacity of 277 acre-feet, this dam plays a crucial role in managing water resources in the region.

Managed by the local government and regulated by the Texas Commission on Environmental Quality (TCEQ), the Sister Grove Creek WS SCS Site 35 Dam has a high risk assessment rating of 2. While the dam's condition assessment is not rated, it is inspected, permitted, and enforced by state agencies to ensure its structural integrity and safety. With no spillway and a single outlet gate, this dam is designed to effectively control water flow and mitigate flood risks in the area. Despite its high hazard potential, the dam's risk management measures and emergency action plan status are currently not available.

Water resource and climate enthusiasts will find the Sister Grove Creek WS SCS Site 35 Dam to be a significant infrastructure project that contributes to the overall water management efforts in Grayson County, Texas. With a primary purpose of flood risk reduction, this dam serves as a critical barrier against potential inundation events and plays a key role in protecting the local community and environment. As part of a larger network of water management structures, the Sister Grove Creek Dam exemplifies the importance of sustainable water resource management practices in the face of changing climate dynamics.

Year Completed

1959

Dam Length

1075

Dam Height

37

River Or Stream

TR-EAST PRONG SISTER GROVE CR

Primary Dam Type

Earth

Surface Area

6.8

Hydraulic Height

37

Drainage Area

0.56

Nid Storage

277

Structural Height

37

Outlet Gates

None - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

37
       
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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.