Mill Watershed Structure Lt-14b-3 Dam Reservoir Report
Last Updated: December 5, 2025
The Mill Watershed Structure Lt-14b-3 Dam, also known as Rhea Lake, is a private-owned earth dam located in Marshall, Mississippi.
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Summary
Built in 1970 by the USDA NRCS, this dam serves primarily for recreational purposes and stands at a height of 25 feet with a storage capacity of 869 acre-feet. It is regulated by the Mississippi Department of Environmental Quality and is classified as having a low hazard potential with a moderate risk assessment.
Situated on the TR-Mill Creek and Conersville Creek, the Mill Watershed Structure Lt-14b-3 Dam is a vital component of water resource management in the area. Despite its uncontrolled spillway and outlet gates, the dam has not been rated for its condition assessment, highlighting the need for ongoing monitoring and maintenance. With a drainage area of 2.39 square miles, this dam plays a crucial role in managing water flow and reducing the risk of flooding in the surrounding region.
As a key structure in the Vicksburg District, the Mill Watershed Structure Lt-14b-3 Dam serves as a reminder of the importance of sustainable water resource management in the face of changing climate patterns. Its presence not only provides recreational opportunities for the local community but also underscores the need for continued investment in infrastructure to ensure the safety and security of water resources for future generations.
Year Completed |
1970 |
Dam Height |
25 |
River Or Stream |
TR- MILL CR; CONERSVILLE CR |
Primary Dam Type |
Earth |
Drainage Area |
2.39 |
Nid Storage |
869 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Tallahatchie River At Etta
|
156cfs |
Yocona River Nr Oxford
|
96cfs |
Wolf River At Lagrange
|
227cfs |
Coldwater River Nr Olive Branch
|
104cfs |
Otoucalofa Creek Canal Nr Water Valley
|
25cfs |
Wolf River At Rossville
|
497cfs |
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.
Mill Watershed Structure Lt-14b-3 Dam