Potacocawa Watershed Structure Y-31a-11 Dam Reservoir Report
Last Updated: December 5, 2025
The Potacocawa Watershed Structure Y-31a-11 Dam, also known as Gregory Dam, is a key flood risk reduction infrastructure located in Carroll, Mississippi.
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Summary
Built in 1966 by the USDA NRCS, this earth dam stands at a height of 38 feet and has a storage capacity of 1770 acre-feet. Situated on Billups Creek, the dam serves the primary purpose of flood risk reduction and is regulated by the Mississippi Department of Environmental Quality.
With a low hazard potential and a moderate risk assessment rating, the Potacocawa Watershed Structure Y-31a-11 Dam plays a crucial role in managing water resources in the region. Despite not being rated for condition assessment, the dam remains a critical piece of infrastructure for the local government in Jefferson. As a part of the Vicksburg District, the dam provides vital protection against potential flooding events in the area, highlighting its significance for both water resource and climate enthusiasts.
Year Completed |
1966 |
Dam Height |
38 |
River Or Stream |
BILLUPS CREEK |
Primary Dam Type |
Earth |
Surface Area |
54 |
Drainage Area |
4.31 |
Nid Storage |
1770 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
38 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Batupan Bogue At Grenada
|
134cfs |
Yalobusha River At Grenada
|
3080cfs |
Tallahatchie River At Money
|
6080cfs |
Abiaca Creek At Cruger
|
44cfs |
Big Black River At West
|
223cfs |
Otoucalofa Creek Canal Nr Water Valley
|
25cfs |
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-11 Dam