Glenn Lake Dam Reservoir Report

Last Updated: December 5, 2025

Glenn Lake Dam, located in Harris, Georgia, was completed in 1954 and stands at a height of 25.4 feet.


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Summary

This earth dam, primarily used for recreation, has a maximum storage capacity of 115.5 acre-feet and a normal storage capacity of 84 acre-feet. With a surface area of 8 acres and serving a drainage area of 55 square miles, the dam plays a crucial role in managing water resources in the region.

Despite being privately owned, Glenn Lake Dam is subject to state jurisdiction and inspection, ensuring its safety and compliance with regulations. The dam's hazard potential is rated as low, with a moderate risk assessment score of 3. While the condition assessment is listed as not rated, the overall risk management measures are in place to mitigate any potential risks associated with the structure. The dam's uncontrolled spillway type and outlet gates highlight the importance of proper monitoring and maintenance to ensure the safety of the surrounding area.

Enthusiasts of water resources and climate will find Glenn Lake Dam to be a fascinating structure with a rich history and important role in the local ecosystem. Its construction and operation provide valuable insights into the management of water resources and the impact of dams on the environment. With its recreational purpose and low hazard potential, Glenn Lake Dam stands as a testament to responsible dam management in Georgia.

Year Completed

1954

Dam Length

685

Dam Height

25.4

Primary Dam Type

Earth

Surface Area

8

Hydraulic Height

25.7

Drainage Area

55

Nid Storage

115.5

Structural Height

25.7

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

26
       
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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.