Long Lake Dam Reservoir Report
Nearby: Ms05803 Lake Dam Ms05804 Lake Dam
Last Updated: December 6, 2025
Long Lake Dam, located in Union, Mississippi, is a privately owned structure primarily used for recreation purposes.
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Summary
Built in 1971, this earth dam with a buttress core stands at a height of 55 feet, providing a storage capacity of 264 acre-feet. The dam is regulated by the Mississippi Department of Environmental Quality, with inspections and enforcement carried out at the state level to ensure its safety and compliance with regulations.
Despite being categorized as having a low hazard potential, Long Lake Dam is considered to have a moderate risk level, with a rating of 3 out of 5. While the condition of the dam is currently not rated, it is important for water resource and climate enthusiasts to note that risk management measures are in place to mitigate potential hazards. The dam features an uncontrolled spillway type and does not have associated locks, highlighting its focus on recreational use and water storage capabilities.
With its picturesque location and ample storage capacity, Long Lake Dam serves as a valuable asset for the surrounding community. Water resource and climate enthusiasts can appreciate the efforts taken to ensure the safety and functionality of this dam, as well as the recreational opportunities it provides. As a privately owned structure regulated by state authorities, Long Lake Dam exemplifies the importance of responsible management and maintenance in sustaining water resources for future generations.
Year Completed |
1971 |
Dam Height |
55 |
Nid Storage |
264 |
Hazard Potential |
Low |
Nid Height |
55 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Tallahatchie River At Etta
|
220cfs |
Twentymile Creek Nr Guntown
|
36cfs |
Town Creek At Eason Boulevard At Tupelo
|
65cfs |
Tombigbee River Nr Fulton
|
182cfs |
Hatchie River Near Walnut
|
172cfs |
Cummings Creek Nr Fulton
|
26cfs |
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.
Long Lake Dam