Cresent Lake Dam Reservoir Report

Last Updated: December 5, 2025

Cresent Lake Dam, located in Decatur, Georgia, is a privately owned structure primarily used for water supply purposes.


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Summary

This Earth dam, with a height of 14.2 feet and a hydraulic height of 12.6 feet, stands at the heart of the Savannah District. The dam has a storage capacity of 343.8 acre-feet, with a normal storage level of 125.7 acre-feet, covering a surface area of 35.9 acres.

Despite being uncontrolled, the dam has a low hazard potential and is currently in a not rated condition. The last inspection conducted on April 1, 2008, revealed a moderate risk level of 3, prompting an inspection frequency of every five years. While the dam lacks certain emergency preparedness measures such as an Emergency Action Plan (EAP) and inundation maps, it meets regulatory guidelines and is monitored for risk management.

Cresent Lake Dam, nestled in the picturesque landscape of Decatur, Georgia, serves as a vital water resource in the region. With its modest size and low hazard potential, the dam continues to provide essential water supply services while maintaining a moderate level of risk assessment. Enthusiasts of water resources and climate sustainability will find Cresent Lake Dam to be an intriguing case study in private dam ownership and management.

Dam Length

150

Dam Height

14.2

River Or Stream

UNKNOWN

Primary Dam Type

Earth

Surface Area

35.9

Hydraulic Height

12.6

Nid Storage

343.8

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

14
       
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.