Locks Watershed Structure Lt-9a-1 Dam Reservoir Report
Last Updated: December 6, 2025
Locks Watershed Structure Lt-9a-1 Dam, located in Union, Mississippi, was completed in 1968 by the USDA NRCS and serves as a vital component for flood risk reduction along the Locks Creek East Fork.
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Summary
This earth-type dam with a height of 21 feet has a storage capacity of 674 acre-feet and is regulated by the Mississippi Department of Environmental Quality. Despite being classified as having a low hazard potential, the dam is considered to have moderate risk according to the available data.
The dam features an uncontrolled spillway and outlet gates, with no associated locks, and is primarily owned and operated by the local government. It is part of the Vicksburg District under the oversight of the Natural Resources Conservation Service. While the condition of the dam is not rated, it undergoes regular state inspection and enforcement to ensure its structural integrity and functionality. With its significant contribution to flood risk reduction in the area, Locks Watershed Structure Lt-9a-1 Dam plays a crucial role in protecting the surrounding communities and water resources.
As an essential infrastructure for water resource management in the region, Locks Watershed Structure Lt-9a-1 Dam represents a key piece in the overall watershed structure. Despite its moderate risk assessment, the dam's importance in flood control and environmental protection cannot be overstated. With its historical significance and ongoing regulatory oversight, this dam serves as a testament to the collaborative efforts between local and state agencies to safeguard water resources and mitigate potential hazards in the area.
Year Completed |
1968 |
Dam Height |
21 |
River Or Stream |
LOCKS CREEK E FORK |
Primary Dam Type |
Earth |
Drainage Area |
1.66 |
Nid Storage |
674 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
21 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Tallahatchie River At Etta
|
156cfs |
Hatchie River Near Walnut
|
153cfs |
Wolf River At Lagrange
|
227cfs |
Yocona River Nr Oxford
|
96cfs |
Town Creek At Eason Boulevard At Tupelo
|
65cfs |
Twentymile Creek Nr Guntown
|
23cfs |
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.
Locks Watershed Structure Lt-9a-1 Dam