Omar Lake Dam Reservoir Report

Last Updated: December 5, 2025

Omar Lake Dam, also known as Mathis Lake Dam, is a private structure located in Griffin, Georgia, within Spalding County.


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Summary

Built in 1935 by the late Dr. Mathis, this earth dam stands at a height of 17 feet and stretches 552 feet in length. Its primary purpose is for recreational use, providing a serene setting for visitors to enjoy the surrounding natural beauty.

With a storage capacity of 142 acre-feet and a drainage area of 418 square miles, Omar Lake Dam serves as a low-hazard structure with a moderate risk assessment. While not regulated by the state, the dam undergoes regular inspections, with the last one conducted in October 2012 at a frequency of every five years. The dam features uncontrolled spillways and outlet gates, maintaining its condition as not rated. Overall, Omar Lake Dam presents an opportunity for water resource and climate enthusiasts to appreciate its historical significance and recreational value in the heart of Georgia.

Year Completed

1935

Dam Length

552

Dam Height

17

River Or Stream

UNKNOWN

Primary Dam Type

Earth

Surface Area

17

Drainage Area

418

Nid Storage

142

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

17
       
Seasonal Comparison

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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.