Toposhaw Watershed Structure Y-27-01 Dam Reservoir Report
Nearby: Ms04810 Lake Dam Ms04811 Lake Dam
Last Updated: December 6, 2025
The Toposhaw Watershed Structure Y-27-01 Dam, located in Chickasaw, Mississippi, is a privately owned earth dam designed by the USDA NRCS for flood risk reduction on the TR-Toposhaw Creek.
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Summary
Completed in 1971, this dam has a height of 25 feet and a storage capacity of 928 acre-feet. It is regulated by the Mississippi Department of Environmental Quality and is inspected, permitted, and enforced by state authorities to ensure its safety and compliance with regulations.
Despite being classified as having a low hazard potential, the Toposhaw Dam is rated as moderate risk level (3) due to its uncontrolled spillway and outlet gates. The dam's condition is currently not rated, and it does not have an emergency action plan in place. While the dam has not been modified in recent years, it is important for water resource and climate enthusiasts to monitor its risk assessment and management measures to ensure the safety of surrounding communities and the environment.
As part of the flood risk reduction strategy in the area, the Toposhaw Dam plays a crucial role in managing water flow and protecting downstream areas from potential flooding. Its location in Grenada, Mississippi, underscores the importance of maintaining and monitoring these structures to safeguard water resources and mitigate the impacts of climate change in the region.
Year Completed |
1971 |
Dam Height |
25 |
River Or Stream |
TR- TOPOSHAW CREEK |
Primary Dam Type |
Earth |
Drainage Area |
1.66 |
Nid Storage |
928 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Skuna River At Bruce
|
71cfs |
Tombigbee River At Aberdeen Lock And Dam
|
121cfs |
Catalpa Creek At Mayhew
|
2940cfs |
Town Creek Nr Nettleton
|
218cfs |
Tombigbee River Nr Amory
|
3330cfs |
Tombigbee River At Bigbee
|
355cfs |
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.
Toposhaw Watershed Structure Y-27-01 Dam