Johnson -Higdon Lake Dam Reservoir Report
Last Updated: December 5, 2025
Johnson-Higdon Lake Dam, located in Attapulgus, Georgia, was completed in 1999 and serves as a crucial earth-type structure with a buttress core.
°F
°F
mph
Wind
%
Humidity
Summary
This private dam has a height of 20.5 feet and a hydraulic height of 17.5 feet, providing a storage capacity of 92 acre-feet. While the dam is categorized as having a low hazard potential, it is rated as having a moderate risk level, indicating the need for ongoing risk management measures.
Despite not being state-regulated or inspected, Johnson-Higdon Lake Dam plays a vital role in water resource management in Decatur County, Georgia. With a surface area of 8 acres and a normal storage capacity of 52 acre-feet, the dam contributes to the region's water supply and flood control efforts. While the dam's condition is currently not rated, its risk level underscores the importance of continued monitoring and maintenance to ensure its long-term safety and effectiveness.
As a key component of the Savannah District's water infrastructure, Johnson-Higdon Lake Dam aligns with the mission of the US Army Corps of Engineers to provide vital water resource management and infrastructure support. With its uncontrolled spillway and outlet gates, the dam stands as a testament to the importance of sustainable water management practices in the face of climate change and increasing water resource challenges.
Year Completed |
1999 |
Dam Length |
190 |
Dam Height |
20.5 |
Primary Dam Type |
Earth |
Surface Area |
8 |
Hydraulic Height |
17.5 |
Nid Storage |
92 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
21 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Attapulgus Creek At Attapulgus
|
24cfs |
Little River Nr Quincy
|
101cfs |
Ochlockonee River Nr Concord
|
79cfs |
Flint River At Bainbridge
|
4570cfs |
Ochlockonee River Nr Havana
|
61cfs |
Little River Nr Midway
|
94cfs |
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.
Johnson -Higdon Lake Dam