Hamil Lake Dam Reservoir Report

Last Updated: December 6, 2025

Hamil Lake Dam, located in Griffin, Georgia, is a private-owned Earth dam with a height of 9 feet and a length of 681 feet.


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Summary

This dam serves a variety of purposes, including water storage with a capacity of 54 acre-feet, covering a surface area of 8.3 acres. It also plays a role in flood control, with a moderate risk assessment rating of 3.

Despite being unregulated by the state, Hamil Lake Dam has a low hazard potential and has not been rated for its condition assessment. The dam features an uncontrolled spillway and outlet gates, indicating a simpler design compared to more complex dam structures. While it does not have a designated emergency action plan or regular inspection schedule, the dam serves as a vital resource in the region's water management and conservation efforts.

For water resource and climate enthusiasts, Hamil Lake Dam offers a unique glimpse into the diverse landscape of dam infrastructure in the United States. With its moderate risk assessment and low hazard potential, this Earth dam represents a balance between water storage and flood control in the region. As climate change continues to impact water resources, understanding the role of dams like Hamil Lake in managing water supply and mitigating risks becomes increasingly important for sustainable water management practices.

Dam Length

681

Dam Height

9

Primary Dam Type

Earth

Surface Area

8.3

Drainage Area

458

Nid Storage

54

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

9
       
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.