Lake Thehama Dam Reservoir Report
Last Updated: December 5, 2025
Lake Thehama Dam, also known as the Proposed Allen Lake Dam, is a private dam located in Banks, Georgia.
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Summary
Designed by ED ADAMS, PE, this earth dam stands at a height of 35 feet and has a hydraulic height of 34 feet. With a primary purpose of recreation, the dam offers a maximum storage capacity of 373 acre-feet and a normal storage capacity of 310 acre-feet.
Situated in the Savannah District, Lake Thehama Dam has a surface area of 20 acres and a length of 300 feet. The dam features an uncontrolled spillway and outlet gates, with a low hazard potential and a moderate risk assessment score of 3. Although it has not been rated for condition assessment, the dam underwent its last inspection in October 2012 and is scheduled for inspections every 5 years.
Enthusiasts of water resources and climate will find Lake Thehama Dam a fascinating structure for recreation in Georgia. With its scenic location and modest risk profile, this private dam offers a unique opportunity for outdoor activities while also serving as a vital component of the local water management system.
Dam Length |
300 |
Dam Height |
35 |
Primary Dam Type |
Earth |
Surface Area |
20 |
Hydraulic Height |
34 |
Nid Storage |
373 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
35 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Chattahoochee River Near Cornelia
|
399cfs |
Chattahoochee River Near Leaf
|
230cfs |
Middle Oconee River Near Arcade
|
269cfs |
North Oconee River At College St
|
197cfs |
Tallulah River Ab Powerhouse
|
45cfs |
Middle Oconee River Near Athens
|
312cfs |
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.
Lake Thehama Dam