Sister Grove Creek Ws Scs Site 19 Dam Reservoir Report

Last Updated: December 6, 2025

Sister Grove Creek WS SCS Site 19 Dam, located in Grayson County, Texas, stands as a testament to effective flood risk reduction efforts since its completion in 1958.


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Summary

Managed by the USDA NRCS and regulated by the TCEQ, this earth dam with a buttress core type measures 43 feet in height and spans 1525 feet in length. The dam has a storage capacity of 955 acre-feet and serves the primary purpose of flood risk reduction along the TR-Sister Grove Creek.

With a moderate risk assessment rating and a history of regular inspections, Sister Grove Creek Dam is equipped with a slide gate and two uncontrolled outlets for water release. The dam's spillway, measuring 124 feet in width, ensures controlled water flow during periods of high discharge. Although the condition of the dam is currently not rated, the emergency action plan was last revised in 2017, indicating a proactive approach to safety and risk management. For water resource and climate enthusiasts, Sister Grove Creek WS SCS Site 19 Dam serves as a remarkable example of infrastructure designed to safeguard against flooding and protect the surrounding community.

Year Completed

1958

Dam Length

1525

Dam Height

43

River Or Stream

TR-SISTER GROVE CREEK

Primary Dam Type

Earth

Surface Area

23.6

Hydraulic Height

43

Drainage Area

1.63

Nid Storage

955

Structural Height

43

Outlet Gates

Slide (sluice gate) - 1, Uncontrolled - 2

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

43
       
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.