Griggs Lake Dam South Reservoir Report
Last Updated: December 13, 2025
Griggs Lake Dam South, located in Unadilla, Georgia, was completed in 1976 with the primary purpose of irrigation.
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Summary
This private earth dam stands at 22.3 feet high and has a hydraulic height of 19.7 feet. With a normal storage capacity of 170 acre-feet and a maximum storage of 385 acre-feet, this dam plays a crucial role in providing water for agricultural irrigation in the region.
The dam is classified as having a low hazard potential and a moderate risk level, with an inspection frequency of every 5 years. Despite being privately owned, the dam is subject to state jurisdiction and inspection. The dam features an uncontrolled spillway and outlet gates, indicating its reliance on natural flow regulation methods. The condition of the dam is currently not rated, highlighting the need for ongoing monitoring and maintenance to ensure its safety and functionality for the surrounding community.
Griggs Lake Dam South is a vital component of the water resource infrastructure in Dooly County, Georgia. Managed by the Natural Resources Conservation Service, this dam serves as a key source of irrigation water for local agricultural activities. As the climate continues to change and water resources become increasingly scarce, the proper maintenance and management of dams like Griggs Lake Dam South are essential for sustaining water availability for both current and future generations.
Year Completed |
1976 |
Dam Length |
1236 |
Dam Height |
22.3 |
River Or Stream |
UNKNOWN |
Primary Dam Type |
Earth |
Surface Area |
26 |
Hydraulic Height |
19.7 |
Nid Storage |
385 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
22 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Tucsawhatchee Creek Near Hawkinsville
|
28cfs |
Ocmulgee River At Hawkinsville
|
1900cfs |
Turkey Creek At Byromville
|
12cfs |
Flint River At Ga 26
|
1490cfs |
Muckalee Creek Near Americus
|
109cfs |
Tobesofkee Creek Near Macon
|
7cfs |
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.
Griggs Lake Dam South