Thomas Lake Dam Reservoir Report
Last Updated: December 13, 2025
Thomas Lake Dam, located in Hall, Georgia, is a privately owned structure with a height of 27 feet and a storage capacity of 36 acre-feet.
°F
°F
mph
Wind
%
Humidity
Summary
The dam, primarily constructed of earth with a buttress core, serves a low hazard potential and has a moderate risk assessment rating. While it is not regulated by the state, the dam is inspected every five years to ensure its structural integrity and safety.
Built by the Natural Resources Conservation Service, Thomas Lake Dam features an uncontrolled spillway and outlet gates. Despite its modest size, the dam plays a crucial role in managing water resources in the area and contributes to the overall water management system. While the dam's condition is currently not rated, its risk assessment indicates the need for ongoing monitoring and potential risk management measures to ensure its continued safe operation.
Although the dam has not been modified in recent years and lacks certain emergency preparedness protocols, its low hazard potential and moderate risk assessment make it a noteworthy structure for water resource and climate enthusiasts. The presence of Thomas Lake Dam highlights the importance of maintaining and monitoring dams, even those with lower hazard potentials, to safeguard communities and water resources in the face of changing environmental conditions.
Dam Height |
27 |
Primary Dam Type |
Earth |
Surface Area |
3 |
Nid Storage |
36 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
27 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Bolding Mill - Lake Lanier
War Hill - Lake Lanier
Paradise Valley Resort & Club
Duckett Mill - Lake Lanier
River Forks - Lake Lanier
Laurel Park - Lake Lanier
Thomas Lake Dam