Upper Yockanookany Ws Str 4 Dam Reservoir Report
Last Updated: December 5, 2025
The Upper Yockanookany WS Str 4 Dam, located in Ackerman, Mississippi, serves as a crucial structure for flood risk reduction along the Unt of Yockanookany River.
°F
°F
mph
Wind
%
Humidity
Summary
Built in 1979 by the USDA NRCS, this earth dam stands at a height of 26.5 feet and has a normal storage capacity of 28 acre-feet. Despite its important role in mitigating flood hazards, the dam is classified as having a high hazard potential and a poor condition assessment, indicating the need for ongoing maintenance and potential upgrades to ensure its effectiveness and safety.
This dam, designed with a buttress core type and a soil foundation, spans 800 feet in length and covers a surface area of 7.9 acres. Its uncontrolled spillway type and outlet gates highlight the need for continuous monitoring and inspection to manage potential risks and ensure proper functionality during extreme weather events. The dam's association with the Mississippi Department of Environmental Quality underscores the state's regulatory oversight and commitment to maintaining the dam's integrity and safety standards.
Given its moderate risk assessment rating and the high hazard potential associated with the dam, stakeholders and water resource enthusiasts must stay informed about the ongoing condition assessments, inspection schedules, and any proposed risk management measures for the Upper Yockanookany WS Str 4 Dam. As a critical infrastructure for flood risk reduction in Choctaw, Mississippi, this dam requires careful attention and proactive measures to safeguard both the local community and surrounding ecosystems from potential flooding events.
Year Completed |
1979 |
Dam Length |
800 |
Dam Height |
26.5 |
River Or Stream |
UNT OF YOCKANOOKANY RIVER |
Primary Dam Type |
Earth |
Surface Area |
7.9 |
Hydraulic Height |
22 |
Drainage Area |
0.32 |
Nid Storage |
96 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
27 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Yockanookany River Nr Kosciusko
|
45cfs |
Pearl River At Burnside
|
1070cfs |
Catalpa Creek At Mayhew
|
2940cfs |
Big Black River At West
|
223cfs |
Pearl River At Edinburg
|
182cfs |
Noxubee River At Macon
|
146cfs |
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.
Upper Yockanookany Ws Str 4 Dam