Potacocawa Watershed Structure Y-31a-19 Dam Reservoir Report
Last Updated: December 5, 2025
Potacocawa Watershed Structure Y-31a-19 Dam, also known as Clark Dam #3, is a local government-owned structure located in Avalon, Mississippi.
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Summary
Designed by USDA NRCS and completed in 1967, this earth dam stands at a height of 23 feet and has a storage capacity of 142 acre-feet. Its primary purpose is flood risk reduction, serving the TR-Greasy Creek river or stream in Carroll County.
This low-hazard dam with a moderate risk assessment rating is regulated by the Mississippi Department of Environmental Quality and undergoes regular inspections and enforcement to ensure its safety and functionality. With an uncontrolled spillway and outlet gates, the structure is designed to manage potential flooding events effectively. The dam's risk management measures and emergency action plan status are currently not rated, but its overall condition assessment is deemed satisfactory.
Water resource and climate enthusiasts will appreciate the importance of Potacocawa Watershed Structure Y-31a-19 Dam in mitigating flood risks in the region and its contribution to water management efforts. Its design and construction by the Natural Resources Conservation Service reflect a commitment to sustainable infrastructure development. As a key component of the Vicksburg District's flood risk reduction strategy, this dam plays a vital role in protecting the local community and surrounding areas from potential water-related hazards.
Year Completed |
1967 |
Dam Height |
23 |
River Or Stream |
TR- GREASY CREEK |
Primary Dam Type |
Earth |
Surface Area |
5.4 |
Drainage Area |
0.38 |
Nid Storage |
142 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
23 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Yalobusha River At Grenada
|
3080cfs |
Batupan Bogue At Grenada
|
134cfs |
Tallahatchie River At Money
|
6080cfs |
Abiaca Creek At Cruger
|
44cfs |
Big Black River At West
|
223cfs |
Big Sunflower River At Sunflower
|
1370cfs |
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.
Potacocawa Watershed Structure Y-31a-19 Dam