T & T Johnston Lake Dam Reservoir Report
Nearby: Ms06870 Lake Dam Ms06872 Lake Dam
Last Updated: December 6, 2025
T & T Johnston Lake Dam, located in Leake, Mississippi, is a privately owned earth dam with a primary purpose of recreation.
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Summary
The dam, standing at 15 feet high with a hydraulic height of 12 feet, creates a storage capacity of 105 acre-feet and covers a surface area of 15 acres. The dam is situated on the Federick Branch river and is regulated by the Mississippi Department of Environmental Quality, with state permitting, inspection, and enforcement in place to ensure its safety and compliance. Despite its low hazard potential, the dam's risk assessment is moderate (3), indicating the need for ongoing risk management measures.
With a spillway type of uncontrolled and no associated locks or outlets, T & T Johnston Lake Dam provides a picturesque setting for recreational activities in the area. The dam's condition assessment is currently not rated, and there is no information available on its inspection frequency or emergency action plan preparedness. However, the dam's risk assessment and risk management measures suggest a level of caution and preparedness in the event of any potential incidents. As a key feature in the region's water resource infrastructure, the dam serves as both a recreational hotspot and a vital element in the local ecosystem's hydrological balance.
Dam Length |
610 |
Dam Height |
15 |
River Or Stream |
FEDERICK BRANCH |
Primary Dam Type |
Earth |
Surface Area |
15 |
Hydraulic Height |
12 |
Drainage Area |
0.5 |
Nid Storage |
105 |
Structural Height |
15 |
Hazard Potential |
Low |
Nid Height |
15 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Pearl River At Edinburg
|
182cfs |
Pearl River Nr Carthage
|
263cfs |
Yockanookany River Nr Kosciusko
|
45cfs |
Yockanookany River Nr Ofahoma
|
103cfs |
Pearl River Nr Lena
|
468cfs |
Tuscolameta Creek At Walnut Grove
|
137cfs |
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.
T & T Johnston Lake Dam