Cason Lake Dam Reservoir Report
Last Updated: December 13, 2025
Cason Lake Dam, located in Twiggs County, Georgia, is a privately owned structure primarily used for recreation.
°F
°F
mph
Wind
%
Humidity
Summary
Completed in 1940, this earth dam stands at 14.5 feet high and stretches 448 feet in length, with a storage capacity of 140 acre-feet and a normal storage of 64.2 acre-feet. The dam overlooks Hasty Branch and is situated in the picturesque Shellstone Creek environs, offering a serene and scenic destination for water resource and climate enthusiasts.
With a low hazard potential and a moderate risk assessment rating, Cason Lake Dam is not currently regulated by the state of Georgia but undergoes regular inspections to ensure its structural integrity. The dam features an uncontrolled spillway and outlet gates, serving its primary purpose of recreation for the local community. Despite being of unknown designer origin, the dam remains a vital part of the surrounding ecosystem, providing a safe and enjoyable environment for outdoor activities.
As an earth dam with a buttress core type, Cason Lake Dam poses minimal risk to the surrounding area but is still subject to periodic inspections to assess its condition. While it is not currently rated for its condition, the dam is maintained to meet safety standards and ensure the protection of both the environment and the public. Its tranquil setting along Hasty Branch makes it a popular spot for water and nature enthusiasts to appreciate the beauty of Georgia's natural landscapes.
Year Completed |
1940 |
Dam Length |
448 |
Dam Height |
14.5 |
River Or Stream |
HASTY BRANCH |
Primary Dam Type |
Earth |
Surface Area |
12 |
Drainage Area |
1570 |
Nid Storage |
140 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
15 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Ocmulgee River At Hawkinsville
|
2110cfs |
Ocmulgee River At Macon
|
817cfs |
Tucsawhatchee Creek Near Hawkinsville
|
29cfs |
Oconee River At Dublin
|
1070cfs |
Oconee River Near Oconee
|
895cfs |
Tobesofkee Creek Near Macon
|
7cfs |
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.
Cason Lake Dam