Gillis Lake Dam Reservoir Report
Nearby: Braswell Pond Dam Anderson Pond Dam
Last Updated: December 13, 2025
Gillis Lake Dam, also known as Adrian Housing Dam, is a private-owned structure located in Johnson County, Georgia.
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Summary
Situated on the Ohoopee River, this Earth-type dam serves primarily for recreational purposes. With a height of 14 feet and a storage capacity of 88.1 acre-feet, the dam boasts a surface area of 11 acres and a drainage area of 120 square miles.
Despite its low hazard potential and moderate risk assessment, Gillis Lake Dam has not been rated for its condition. The dam features an uncontrolled spillway and outlet gates, with no listed inspection date or frequency. While it meets recreational needs, the dam's structural assessment and emergency preparedness are still unaddressed, leaving room for improvement in terms of risk management measures and adherence to guidelines.
Enthusiasts of water resources and climate will find Gillis Lake Dam an intriguing structure due to its unique design and purpose. Located in a picturesque setting in Adrian, Georgia, this dam offers both recreational opportunities and potential for further enhancement in terms of safety and regulatory compliance. With its moderate risk assessment and uncontrolled spillway, the dam presents an interesting case study for those interested in the intersection of water management, infrastructure, and environmental stewardship.
Dam Length |
900 |
Dam Height |
14 |
River Or Stream |
OHOOPEE RIVER |
Primary Dam Type |
Earth |
Surface Area |
11 |
Hydraulic Height |
11 |
Drainage Area |
120 |
Nid Storage |
88.1 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
14 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Oconee River At Dublin
|
1070cfs |
Oconee River Near Mount Vernon
|
1340cfs |
Oconee River Near Oconee
|
895cfs |
Ogeechee River At Midville
|
674cfs |
Williamson Swamp Creek At Davisboro
|
56cfs |
Buffalo Creek At Ga 272
|
54cfs |
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.
Gillis Lake Dam