Greenlakes (Lower) Dam Reservoir Report
Last Updated: December 13, 2025
Greenlakes (Lower) Dam in Coffee, Georgia, stands as a private earth dam completed in 1986 with a primary purpose of recreation.
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Summary
Designed by Dan McGill, this structure boasts a modest height of 15.8 feet and a storage capacity of 224 acre-feet, providing ample opportunities for water-based activities in the area. The dam's spillway is uncontrolled, and it has a low hazard potential, making it a safe and enjoyable destination for water resource and climate enthusiasts to visit.
Located in the Jacksonville District of the US Army Corps of Engineers, Greenlakes (Lower) Dam offers a surface area of 26.6 acres and drains a watershed of 1257 acres. While the dam's condition is not currently rated, it undergoes inspections every five years to ensure its safety and functionality. With a moderate risk assessment rating of 3, the dam is actively managed to mitigate any potential risks and ensure the continued enjoyment of its recreational benefits for visitors and residents alike.
Overall, Greenlakes (Lower) Dam presents a valuable water resource for the community, providing a serene setting for recreational activities and contributing to the local ecosystem. Its controlled storage capacity and well-maintained facilities make it a vital asset for water management in the region, while its low hazard potential and moderate risk assessment underscore its importance as a safe and sustainable infrastructure for water enthusiasts to appreciate and enjoy.
Year Completed |
1986 |
Dam Length |
930 |
Dam Height |
15.8 |
River Or Stream |
UNKNOWN |
Primary Dam Type |
Earth |
Surface Area |
26.6 |
Hydraulic Height |
16 |
Drainage Area |
1257 |
Nid Storage |
224 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
16 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Alapaha River Near Alapaha
|
87cfs |
Ocmulgee River At Lumber City
|
2740cfs |
Turnpike Creek Near Mcrae
|
11cfs |
Satilla River Near Waycross
|
143cfs |
Altamaha River Near Baxley
|
4410cfs |
Little R At Tifton Worth Co Line Rd
|
38cfs |
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.
Greenlakes (Lower) Dam