Upper Riley Lake Dam Reservoir Report
Last Updated: December 6, 2025
Upper Riley Lake Dam, also known as O'Boyle Ne Lake Dam, is a state-owned structure located in Maxwell, Georgia.
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Summary
Completed in 1968, this earth dam stands at a height of 39 feet and serves primarily for recreational purposes. With a storage capacity of 79 acre-feet, the dam is situated on an unknown river or stream in Jasper County.
The dam's spillway type is uncontrolled, with unlisted stone foundations and an associated surface area of 4 acres. While the hazard potential is rated low, the condition assessment is listed as "Not Rated." The last inspection took place in November 2018, with an inspection frequency of every 5 years. The risk assessment for the dam is moderate, indicating a need for ongoing monitoring and maintenance to ensure the safety and stability of the structure.
Overall, Upper Riley Lake Dam provides a valuable recreational resource for the surrounding community while also posing moderate risks that require careful management and monitoring. As an earth dam with a history dating back to the late 1960s, this structure plays a significant role in water resource management in Jasper County, Georgia, highlighting the importance of maintaining and safeguarding our vital water infrastructure in the face of changing climate conditions.
Year Completed |
1968 |
Dam Length |
495 |
Dam Height |
39 |
River Or Stream |
UNKNOWN |
Primary Dam Type |
Earth |
Surface Area |
4 |
Hydraulic Height |
24 |
Drainage Area |
47 |
Nid Storage |
79 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
39 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Alcovy River Below Covington
|
229cfs |
Ocmulgee River Near Jackson
|
895cfs |
Alcovy River Above Covington
|
183cfs |
Little River Near Eatonton
|
126cfs |
Big Haynes Creek At Bald Rock Road
|
58cfs |
Murder Creek Below Eatonton
|
71cfs |
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.
Upper Riley Lake Dam