Riverdale Lake Dam Reservoir Report
Last Updated: December 6, 2025
Riverdale Lake Dam is a private dam located in Holmes, Mississippi, with a primary purpose of recreation.
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Summary
It is classified as an Earth dam with a Buttress core type, standing at a height of 22 feet and providing a storage capacity of 85 acre-feet. The dam is regulated by the Mississippi Department of Environmental Quality, with state permitting, inspection, and enforcement activities in place to ensure its safety and compliance.
Although the condition of Riverdale Lake Dam is currently listed as "Not Rated" and its hazard potential is considered "Undetermined," a moderate risk assessment rating of 3 has been assigned to it. The dam features an uncontrolled spillway type and no associated locks or gates. While the dam's emergency action plan status and risk management measures are not specified in the data, the presence of state regulatory oversight indicates a commitment to safeguarding the surrounding area and water resources. For water resource and climate enthusiasts, Riverdale Lake Dam presents an intriguing case study in private dam management and the intersection of recreation and environmental protection in Mississippi.
Dam Height |
22 |
Drainage Area |
0.09 |
Nid Storage |
85 |
Hazard Potential |
Undetermined |
Nid Height |
22 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Big Black River At West
|
190cfs |
Harland Creek Nr Howard
|
3340cfs |
Yockanookany River Nr Kosciusko
|
54cfs |
Abiaca Creek At Cruger
|
44cfs |
Yockanookany River Nr Ofahoma
|
96cfs |
Pearl River Nr Lena
|
532cfs |
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.
Riverdale Lake Dam