South Patrick Lake Dam Reservoir Report

Last Updated: December 6, 2025

South Patrick Lake Dam, also known as Patrick Lake Dam #4, is a private-owned structure located in Carrollton, Georgia.


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Summary

This earth dam, with a height of 22.9 feet and a hydraulic height of 21 feet, serves primarily for recreation purposes with a normal storage capacity of 124 acre-feet. The dam overlooks a surface area of 29 acres and is situated within a drainage area of 1377 acres.

Despite being rated with a low hazard potential, South Patrick Lake Dam is subject to periodic inspections, with the last one conducted in December 2017. The dam's risk assessment is moderate, indicating a level 3 risk, though its condition has not been officially rated. Emergency action plans and inundation maps for the dam have not been prepared, suggesting areas for potential improvement in risk management. Overall, this dam provides a vital recreational resource in the area while maintaining moderate risk levels that necessitate ongoing monitoring and assessment.

Dam Length

234

Dam Height

22.9

River Or Stream

UNKNOWN

Primary Dam Type

Earth

Surface Area

29

Hydraulic Height

21

Drainage Area

1377

Nid Storage

322

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

23
       
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.