Dennis Lake Dam Reservoir Report

Last Updated: December 6, 2025

Located in Haralson, Georgia, the Dennis Lake Dam is a private structure primarily used for recreation.


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Summary

The dam, of earth and buttress core type, stands at a height of 18.8 feet with a hydraulic height of 17.1 feet. It has a storage capacity of 128.4 acre-feet and covers a surface area of 9.2 acres. The dam's purpose is to provide recreational opportunities in the area, with a low hazard potential and a moderate risk assessment rating.

Owned by a private entity, the Dennis Lake Dam is not regulated or inspected by the state authorities. Its design is attributed to the Natural Resources Conservation Service, and it operates an uncontrolled spillway and outlet gates. Despite its low hazard potential, the dam's risk assessment indicates moderate risk, highlighting the need for ongoing monitoring and maintenance to ensure its structural integrity and safety for the surrounding community and environment.

Although the Dennis Lake Dam has not been rated for its condition, its last inspection in May 2019 showed no immediate concerns. With no emergency action plan in place, the dam presents a moderate risk level that warrants careful attention and risk management measures to prevent any potential hazards that may arise in the future. For water resource and climate enthusiasts, the Dennis Lake Dam serves as a point of interest in the region, offering recreational activities while also posing a manageable level of risk that requires vigilance and adherence to safety protocols.

Dam Length

258

Dam Height

18.8

River Or Stream

Name unknown

Primary Dam Type

Earth

Surface Area

9.2

Hydraulic Height

17.1

Drainage Area

530

Nid Storage

128.4

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

19
       
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.