Bentonia Watershed Structure 8 Dam Reservoir Report

Last Updated: December 11, 2025

Bentonia Watershed Structure 8 Dam, also known as Thompson's Lake, is a local government-owned structure located in Yazoo County, Mississippi.


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Summary

Designed by USDA NRCS and completed in 1964, this earth dam with a height of 28 feet serves primarily for flood risk reduction along the TR-Bluff Creek. With a storage capacity of 796 acre-feet, the dam is regulated by the Mississippi Department of Environmental Quality and falls under a low hazard potential classification.

Despite not having a rated condition assessment, Bentonia Watershed Structure 8 Dam is considered to have a moderate risk level (3). The dam features an uncontrolled spillway with no outlet gates, and it has not been modified in recent years. While the emergency action plan status and risk management measures are not specified, the structure is subject to state inspection, enforcement, and regulatory oversight to ensure its integrity and safety. This dam serves as a vital component in mitigating flood risks in the region, showcasing the importance of water resource management and climate resilience efforts in safeguarding communities against natural disasters.

Year Completed

1964

Dam Height

28

River Or Stream

TR- BLUFF CREEK

Primary Dam Type

Earth

Drainage Area

1.71

Nid Storage

796

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Soil

Nid Height

28
       
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.