Windmill Subdivision Lake Dam Reservoir Report

Last Updated: December 5, 2025

Windmill Subdivision Lake Dam in Dallas, Georgia, is a privately owned earth dam built in 1939 primarily for recreational purposes.


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Summary

Standing at a height of 27.1 feet and with a hydraulic height of 22.6 feet, this dam stores a maximum of 83.2 acre-feet of water in its 6.5-acre surface area. Despite its age, Windmill Subdivision Lake Dam has a low hazard potential and is currently in a not-rated condition.

Located within the Mobile District of the US Army Corps of Engineers, this dam is inspected every 5 years, with the last inspection conducted in August 2018. With an uncontrolled spillway and outlet gates, the dam has not been modified over the years and poses a moderate risk level of 3. While there is no state regulation or permitting for this dam, it falls under the jurisdiction of the state of Georgia. Overall, Windmill Subdivision Lake Dam serves as a vital asset for the local community, providing not only recreational opportunities but also contributing to the overall water resource management in the area.

Year Completed

1939

Dam Length

264

Dam Height

27.1

River Or Stream

Unknown

Primary Dam Type

Earth

Surface Area

6.5

Hydraulic Height

22.6

Nid Storage

83.2

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

27
       
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.