Griffin Junior Lake Dam Reservoir Report

Last Updated: December 6, 2025

Griffin Junior Lake Dam, located in Wilkinson, Mississippi, was completed in 1966 by the USDA NRCS and serves as a recreational area for water resource and climate enthusiasts.


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Summary

This private dam, standing at a height of 20 feet, holds a storage capacity of 150 acre-feet in TR- Smith Creek. The dam's primary purpose is for recreation, offering a serene environment for outdoor activities in the Amite County region.

Managed by the Mississippi Department of Environmental Quality, Griffin Junior Lake Dam is regulated, inspected, and enforced to ensure its structural integrity and safety. The dam's design features an earth core type with a buttress foundation, making it a reliable and stable structure for water containment. While the hazard potential is currently undetermined, a moderate risk assessment has been assigned to the dam, indicating the necessity for ongoing risk management measures and monitoring.

Despite its uncontrolled spillway and outlet gates, Griffin Junior Lake Dam remains a popular destination for outdoor enthusiasts seeking a picturesque setting for recreational activities. With its rich history dating back to the 1960s, this private dam continues to provide a valuable water resource for the community while upholding safety and regulatory standards set by the state of Mississippi.

Year Completed

1966

Dam Height

20

River Or Stream

TR- SMITH CREEK

Primary Dam Type

Earth

Nid Storage

150

Outlet Gates

Uncontrolled

Hazard Potential

Undetermined

Foundations

Soil

Nid Height

20
       
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.