Johnston Lake Ms00349 Dam Reservoir Report
Nearby: Norris Lake Dam Ms04995 Lake Dam
Last Updated: December 25, 2025
Johnston Lake Ms00349 Dam, located in Oktibbeha, Mississippi, is a privately owned structure regulated by the Mississippi Department of Environmental Quality.
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Summary
The dam, primarily used for recreation, is classified as an earth dam with a buttress core type and stands at a height of 8 feet. It has a storage capacity of 75 acre-feet and a low hazard potential rating.
Despite not being rated for its condition, the dam is considered to have a moderate risk level and has not been modified in recent years. It features an uncontrolled spillway and has no associated locks or outlet gates. The surrounding area does not have inundation maps prepared, and the Emergency Action Plan status is unclear. Overall, Johnston Lake Ms00349 Dam provides a unique recreational opportunity while maintaining a moderate risk level for those interested in water resource and climate management.
Dam Height |
8 |
Nid Storage |
75 |
Hazard Potential |
Low |
Nid Height |
8 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Catalpa Creek At Mayhew
|
2940cfs |
Tombigbee River At Stennis Lock And Dam
|
1740cfs |
Luxapallila Creek Nr Columbus
|
419cfs |
Noxubee River At Macon
|
137cfs |
Tombigbee River At Aberdeen Lock And Dam
|
1980cfs |
Tombigbee River At Bevill L&D Nr Pickensville
|
2710cfs |
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.
Johnston Lake Ms00349 Dam