J K Simpson Lake Dam Reservoir Report
Last Updated: December 6, 2025
J K Simpson 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 buttress core type, stands at a height of 14 feet and has a storage capacity of 95 acre-feet for recreational purposes. The dam's spillway is uncontrolled, and its hazard potential is currently classified as undetermined with a moderate risk assessment.
Although the dam's condition is not rated, it is subject to regular state inspections, permitting, and enforcement to ensure public safety. Despite its relatively small size and limited information on its construction and modification history, J K Simpson Lake Dam serves as an important recreational resource in the area. With its picturesque location and potential for water-based activities, this dam is a valuable asset for water resource and climate enthusiasts interested in exploring the diverse landscapes of Mississippi.
Dam Height |
14 |
Nid Storage |
95 |
Hazard Potential |
Undetermined |
Nid Height |
14 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Yockanookany River Nr Ofahoma
|
96cfs |
Pearl River Nr Lena
|
532cfs |
Harland Creek Nr Howard
|
3340cfs |
Yockanookany River Nr Kosciusko
|
54cfs |
Pearl River Nr Carthage
|
277cfs |
Big Black River At West
|
190cfs |
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 K Simpson Lake Dam