Hogan's Lake Dam Reservoir Report

Last Updated: December 5, 2025

Hogan's Lake Dam in Gwinnett, Georgia, is a private dam primarily used for recreation.


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Summary

Standing at 32 feet high with a hydraulic height of 24 feet, this earth dam with a buttress core type holds a normal storage capacity of 55 acre-feet and a maximum storage of 170.3 acre-feet. The dam spans 555 feet in length and covers 8 acres of surface area, with a drainage area of 73 acres.

Despite its recreational purpose, Hogan's Lake Dam poses a high hazard potential and is currently assessed as being in poor condition as of the last inspection in February 2016. The dam is uncontrolled, with no outlet gates or spillway width specified. It falls under the jurisdiction of the Georgia Safe Dams Program for regulation, permitting, inspection, and enforcement. With a moderate risk assessment rating of 3, there are no specific risk management measures or emergency action plans in place for the dam.

For water resource and climate enthusiasts, Hogan's Lake Dam presents an intriguing case study of a privately-owned recreational structure with potential risks and challenges that need to be addressed to ensure the safety and sustainability of the surrounding area. The dam's design and condition raise important questions about the management and regulation of such structures, especially in the face of changing climate patterns and increasing concerns over dam safety. Monitoring and addressing the issues identified in the inspection report will be crucial for the long-term resilience of Hogan's Lake Dam and its surrounding community.

Dam Length

555

Dam Height

32

Primary Dam Type

Earth

Surface Area

8

Hydraulic Height

24

Drainage Area

73

Nid Storage

170.3

Structural Height

24

Outlet Gates

Uncontrolled

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

32
       
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.