Sister Grove Creek Ws Scs Site 38 Dam Reservoir Report

Last Updated: December 5, 2025

Sister Grove Creek WS SCS Site 38 Dam, located in Collin, Texas, serves as a crucial flood risk reduction infrastructure along Wolf Run Creek.


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Summary

Built in 1959 by the USDA NRCS, this earth-type dam stands at a height of 36 feet and stretches over 2080 feet in length. With a storage capacity of 1135 acre-feet, it plays a vital role in managing water levels during heavy rainfall events, with a maximum discharge capacity of 3080 cubic feet per second.

The dam is regulated by the Texas Commission on Environmental Quality (TCEQ) and undergoes regular inspections to ensure its structural integrity. However, the recent condition assessment deemed it as 'unsatisfactory', highlighting the need for maintenance and potential upgrades. Despite its moderate risk level, the dam continues to serve its primary purpose of flood risk reduction for the local community, demonstrating the importance of proper water resource management in climate-vulnerable regions like Texas.

As water resource and climate enthusiasts, the Sister Grove Creek WS SCS Site 38 Dam offers a fascinating case study in infrastructure resilience and the intersection of environmental conservation and public safety. Its design, construction, and ongoing management showcase the intricate balance required to protect communities from flooding while also safeguarding ecological systems. As discussions around climate change intensify, understanding the role of dams like this in ensuring water security and resilience becomes increasingly crucial for sustainable development in the face of a changing climate.

Year Completed

1959

Dam Length

2080

Dam Height

36

River Or Stream

WOLF RUN CREEK

Primary Dam Type

Earth

Surface Area

183

Hydraulic Height

36

Drainage Area

2.4

Nid Storage

1135

Structural Height

36

Outlet Gates

Slide (sluice gate) - 1, Uncontrolled - 2

Hazard Potential

Not Available

Foundations

Rock, Soil

Nid Height

36
       
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.