Dennis Lake Dam Reservoir Report

Last Updated: December 5, 2025

Dennis Lake Dam, located in Putnam County, Georgia, is a privately-owned structure with a primary purpose of recreation.


°F

°F

mph

Wind

%

Humidity

Summary

Built in 1970, this earth dam stands at a height of 23 feet and spans a length of 390 feet, providing a storage capacity of 120 acre-feet. The dam's spillway type is uncontrolled, with an uncontrolled outlet gate.

Despite being categorized as having a low hazard potential and a moderate risk assessment, Dennis Lake Dam has not been rated for its condition. It undergoes inspections every five years, with the last one conducted in October 2017. The dam is not regulated by the state but is under state jurisdiction, with enforcement not being applicable.

For water resource and climate enthusiasts, Dennis Lake Dam presents an interesting case study in private dam ownership and its role in supporting recreational activities in the Lake Sinclair environs. The dam's modest size and design characteristics provide insight into the considerations involved in managing a structure of this scale. With its location in a picturesque setting and its historical significance as a recreational feature, Dennis Lake Dam serves as both a functional water management asset and a focal point for outdoor leisure activities.

Year Completed

1970

Dam Length

390

Dam Height

23

River Or Stream

UNKNOWN

Primary Dam Type

Earth

Surface Area

9

Nid Storage

120

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

23
       
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.