Griffin Lake Dam Reservoir Report
Last Updated: December 13, 2025
Griffin Lake Dam, located in Tunnel Hill, Georgia, is a private earth dam primarily used for recreation purposes.
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Summary
Completed in 1957, this dam stands at a height of 23.6 feet and has a hydraulic height of 18.8 feet. The dam has a storage capacity of 121 acre-feet, with a normal storage level of 56 acre-feet. The dam overlooks the NORTH FORK MILL CREEK and provides a serene environment for water resource and climate enthusiasts to enjoy outdoor activities.
Although Griffin Lake Dam has a low hazard potential, it has been rated as moderately risky with a risk assessment score of 3. The dam is currently not rated for its condition but undergoes inspections every five years, with the last inspection conducted in January 2018. Griffin Lake Dam features an uncontrolled spillway and outlet gates, contributing to its recreational appeal while maintaining a safe environment for visitors.
While Griffin Lake Dam does not fall under federal regulation, its private ownership and maintenance ensure a personalized approach to its upkeep. With its picturesque location and moderate risk assessment, Griffin Lake Dam offers water resource and climate enthusiasts a unique opportunity to appreciate nature while understanding the importance of responsible dam management in the face of changing environmental conditions.
Year Completed |
1957 |
Dam Length |
516 |
Dam Height |
23.6 |
River Or Stream |
NORTH FORK MILL CREEK |
Primary Dam Type |
Earth |
Surface Area |
9 |
Hydraulic Height |
18.8 |
Nid Storage |
121 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
24 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Mill Creek At Dalton
|
20cfs |
Conasauga River Near Eton
|
119cfs |
Conasauga River At Tilton
|
222cfs |
South Chickamauga Creek Near Chickamauga
|
178cfs |
Holly Creek Near Chatsworth
|
20cfs |
Mill Creek Near Crandall
|
4cfs |
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.
Griffin Lake Dam