Grant Carter Lake Dam Reservoir Report
Last Updated: December 13, 2025
Grant Carter Lake Dam, located in Irwin, Georgia, is a privately owned Earth dam designed by USDA NRCS and completed in 2008.
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Summary
With a height of 8.5 feet and a hydraulic height of 11 feet, the dam provides a maximum storage capacity of 95.5 acre-feet and a normal storage of 41.3 acre-feet. The dam, with a length of 775 feet, serves a low hazard potential and has not been rated for its condition.
Despite being uncontrolled, the spillway of Grant Carter Lake Dam ensures the safety of the structure, which has not undergone any modifications since its construction. The risk assessment for this dam is moderate, with a risk level of 3, indicating the need for ongoing monitoring and management measures. Although not regulated by the state, the dam is subject to regular inspections to ensure its safety and functionality in the event of emergencies. Overall, Grant Carter Lake Dam stands as a testament to efficient water resource management in Georgia's water infrastructure landscape.
Year Completed |
2008 |
Dam Length |
775 |
Dam Height |
8.5 |
Primary Dam Type |
Earth |
Surface Area |
11 |
Hydraulic Height |
11 |
Nid Storage |
95.5 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
11 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Alapaha River Near Alapaha
|
87cfs |
Little R At Tifton Worth Co Line Rd
|
38cfs |
Turnpike Creek Near Mcrae
|
11cfs |
Ocmulgee River At Lumber City
|
2740cfs |
Little River Near Adel
|
28cfs |
Withlacoochee River At Mcmillan Rd
|
81cfs |
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.
Grant Carter Lake Dam