Mangham Lake Dam Reservoir Report
Last Updated: December 5, 2025
Mangham Lake Dam, located in Lamar County, Georgia, was completed in 1977 and is primarily used for recreation purposes.
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Summary
This private Earth dam stands at a height of 19.8 feet and has a length of 645 feet, creating a reservoir with a storage capacity of 128 acre-feet. The dam, constructed by the Natural Resources Conservation Service, spans over Little Tobesofkee Creek and is operated by private owners in the Redbone Environs area.
Despite being classified as having a low hazard potential, the dam has a moderate risk assessment rating. It is inspected every five years, with the last inspection conducted in September 2014. The dam's spillway is uncontrolled, and it has an uncontrolled outlet gates system. While the dam is not regulated by the state, it falls under state jurisdiction and is subject to regular inspections to ensure its structural integrity and safety.
For water resource and climate enthusiasts, Mangham Lake Dam serves as a vital recreational asset within the community, offering opportunities for fishing, boating, and wildlife observation. Its presence on Little Tobesofkee Creek contributes to the local ecosystem and provides a serene escape for outdoor enthusiasts. As efforts continue to maintain and monitor the dam's condition, its role in water resource management and climate resilience remains a crucial aspect of the region's infrastructure.
Year Completed |
1977 |
Dam Length |
645 |
Dam Height |
19.8 |
River Or Stream |
LITTLE TOBESOFKEE CREEK |
Primary Dam Type |
Earth |
Surface Area |
11 |
Drainage Area |
480 |
Nid Storage |
128 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Flint River Near Culloden
|
1240cfs |
Falling Creek Near Juliette
|
21cfs |
Shoal Creek At Shoal Creek Rd
|
17cfs |
Tobesofkee Creek Near Macon
|
6cfs |
Flint River Near Griffin
|
341cfs |
Ocmulgee River Near Jackson
|
1600cfs |
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.
Mangham Lake Dam