John Aubrey Harper Irrigation Dam Reservoir Report
Nearby: Aubrey Harper Cook Lake Dam
Last Updated: December 6, 2025
The John Aubrey Harper Irrigation Dam, located in Irwin County, Georgia, is a privately owned structure designed by the Soil Conservation Service (SCS) for irrigation purposes.
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Summary
Standing at a height of 15 feet and with a length of 920 feet, the dam has a storage capacity of 141.5 acre-feet and serves a drainage area of 160 acres. Despite its uncontrolled spillway and outlet gates, the dam is categorized as having a low hazard potential and a moderate risk assessment.
This earth dam, with a buttress core type, is situated along an unknown river or stream and falls under the jurisdiction of the state with no federal regulatory agency oversight. The dam has not been rated for its condition assessment, and its last inspection date was in March 2009 with an inspection frequency of every 5 years. While the risk management measures and emergency preparedness aspects of the dam are not detailed in the data, the structure continues to play a vital role in supporting local irrigation needs in the region. For water resource and climate enthusiasts, the John Aubrey Harper Irrigation Dam stands as a testament to the importance of sustainable water management practices in agricultural settings.
Dam Length |
920 |
Dam Height |
15 |
River Or Stream |
UNKNOWN |
Primary Dam Type |
Earth |
Surface Area |
15 |
Drainage Area |
160 |
Nid Storage |
141.5 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
15 |
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.
John Aubrey Harper Irrigation Dam