Big Sand Watershed Structure Y-32-16 Dam Reservoir Report
Last Updated: April 1, 2026
The Big Sand Watershed Structure Y-32-16 Dam, also known as Long Dam, is a vital flood risk reduction structure located in Greenwood, Mississippi.
Summary
Built in 1966 by the USDA NRCS, this earth dam stands at a height of 47 feet and has a structural height of 49 feet, providing essential protection to the surrounding area. With a drainage area of 8.5 square miles and a storage capacity of 3,556 acre-feet, this dam plays a crucial role in managing water flow in the UNT of Teoc Creek.
Despite its significance, the Big Sand Dam is currently rated as having poor condition, with a low hazard potential. The dam features an uncontrolled spillway and outlet gates, highlighting the need for continued monitoring and maintenance to ensure its effectiveness in flood risk mitigation. The Mississippi Department of Environmental Quality oversees the regulation and inspection of the dam, with state permitting and enforcement in place to safeguard the local community. As climate change impacts water resources, the maintenance and monitoring of structures like the Big Sand Dam become increasingly important in protecting communities and ecosystems in the region.
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15-Day Weather Outlook
Year Completed |
1966 |
Dam Length |
695 |
Dam Height |
47 |
River Or Stream |
UNT OF TEOC CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
47 |
Drainage Area |
8.5 |
Nid Storage |
3556 |
Structural Height |
49 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
49 |
Seasonal Comparison
5-Day Hourly Forecast Detail
Nearby Streamflow Levels
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.
Big Sand Watershed Structure Y-32-16 Dam