Grover Willis Lake Dam Reservoir Report
Nearby: Ms04426 Lake Dam Son Vine Lake Dam
Last Updated: December 5, 2025
Grover Willis Lake Dam, located in Neshoba, Mississippi, was completed in 1966 and is primarily used for recreation purposes.
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Summary
The dam, with a height of 10 feet, is an earth dam with a buttress core type and soil foundation. It has a storage capacity of 175 acre feet and is situated along the TR- Pearl River. The dam is owned by a private entity and regulated by the Mississippi Department of Environmental Quality.
Despite its recreational focus, the dam's hazard potential is currently classified as undetermined, with a moderate risk assessment rating. The dam's condition assessment is marked as "Not Rated," indicating a need for further evaluation. The spillway type for Grover Willis Lake Dam is uncontrolled, adding an element of unpredictability to its operation.
For water resource and climate enthusiasts, Grover Willis Lake Dam presents an intriguing case study in dam infrastructure management. With its unique design features and regulatory oversight, this dam serves as a reminder of the importance of maintaining and assessing the safety of water storage structures in the face of changing environmental conditions.
Year Completed |
1966 |
Dam Height |
10 |
River Or Stream |
TR- PEARL RIVER |
Primary Dam Type |
Earth |
Nid Storage |
175 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Undetermined |
Foundations |
Soil |
Nid Height |
10 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Pearl River At Burnside
|
1070cfs |
Pearl River At Edinburg
|
182cfs |
Pearl River Nr Carthage
|
263cfs |
Tuscolameta Creek At Walnut Grove
|
137cfs |
South Canal Tuscolameta Creek Nr Walnut Grove
|
8cfs |
Yockanookany River Nr Kosciusko
|
45cfs |
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.
Grover Willis Lake Dam