Allen Lake Dam Reservoir Report
Nearby: Lake Claiborne Dam Ms06230 Lake Dam
Last Updated: December 6, 2025
Allen Lake Dam, located in Port Gibson, Mississippi, is a privately owned structure primarily used for recreation purposes.
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Summary
Constructed in 1948 by the USDA NRCS, this earth dam with a buttress core stands at a height of 20 feet and offers a storage capacity of 392 acre-feet. The dam is situated on the TR- BAYOU PIERRE river and falls under the regulatory oversight of the Mississippi Department of Environmental Quality.
Despite being classified as having an undetermined hazard potential and not yet rated for its condition assessment, Allen Lake Dam poses a moderate risk, according to the data available. With an uncontrolled spillway and outlet gates, the dam's emergency action plan status and risk management measures remain unclear. However, its historical significance as a recreational site and its picturesque location make it a notable landmark for water resource and climate enthusiasts to explore and study.
Year Completed |
1948 |
Dam Height |
20 |
River Or Stream |
TR- BAYOU PIERRE |
Primary Dam Type |
Earth |
Nid Storage |
392 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Undetermined |
Foundations |
Soil |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Bayou Pierre Nr Willows
|
444cfs |
Mississippi River At Vicksburg
|
329000cfs |
Big Black River Nr Bovina
|
677cfs |
Tensas River At Tendal
|
120cfs |
Homochitto River At Eddiceton
|
168cfs |
Homochitto River At Rosetta
|
2130cfs |
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.
Allen Lake Dam