Lionel Lake Dam Reservoir Report

Last Updated: December 5, 2025

Lionel Lake Dam, located in Gwinnett County, Georgia, stands as a private earth dam primarily used for recreation purposes.


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Summary

Completed in 1975, this dam boasts a height of 27 feet and a hydraulic height of 74 feet, with a storage capacity of 49 acre-feet and a surface area of 5 acres. While the dam is uncontrolled with an unlisted foundation type, its hazard potential is rated as low, offering a moderate risk level.

The dam's unique design, featuring a buttress core type, provides a picturesque backdrop for water resource and climate enthusiasts seeking to explore the surrounding area. With a drainage area of 52 square miles and a normal storage capacity of 37 acre-feet, Lionel Lake Dam offers visitors a tranquil setting for outdoor activities such as fishing, boating, and wildlife observation. Despite its moderate risk level, the dam's condition remains unrated, leaving room for further assessment and potential risk management measures.

As a notable landmark in the Gwinnett County landscape, Lionel Lake Dam stands as a testament to the intersection of water resource management and recreational enjoyment. With its rich history and scenic surroundings, the dam serves as a focal point for local residents and visitors alike, highlighting the importance of sustainable dam operations and maintenance practices in the face of changing climate patterns. As enthusiasts continue to appreciate the natural beauty of this area, efforts to ensure the dam's safety and functionality remain crucial for preserving its legacy for future generations.

Year Completed

1975

Dam Length

726

Dam Height

27

River Or Stream

UNKNOWN

Primary Dam Type

Earth

Surface Area

5

Hydraulic Height

74

Drainage Area

52

Nid Storage

49

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

74
       
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.