J N Brown Lake Dam Reservoir Report
Last Updated: December 6, 2025
J N Brown Lake Dam, located in Madison, Mississippi, is a privately owned structure regulated by the Mississippi Department of Environmental Quality.
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Summary
This earth dam, with a height of 16 feet, serves primarily for recreational purposes, offering a storage capacity of 180 acre-feet. The dam's spillway is uncontrolled, with a low hazard potential and a moderate risk assessment rating.
While the dam's condition assessment is currently not rated, it is subject to state inspection, enforcement, and permitting requirements. The dam poses a low risk of failure, but measures for risk management are not explicitly defined in the available data. Despite its moderate risk assessment, the dam's structured design and regulatory oversight ensure its safe operation for recreational activities at J N Brown Lake. For water resource and climate enthusiasts, the dam serves as a prime example of how private ownership and state regulation can work together to manage water resources sustainably and responsibly.
Dam Height |
16 |
Nid Storage |
180 |
Hazard Potential |
Low |
Nid Height |
16 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Yockanookany River Nr Ofahoma
|
96cfs |
Pearl River Nr Lena
|
532cfs |
Harland Creek Nr Howard
|
3340cfs |
Big Black River Nr Bentonia
|
502cfs |
Pearl River Nr Carthage
|
277cfs |
Yockanookany River Nr Kosciusko
|
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.
J N Brown Lake Dam