Thompson Lake Reservoir Report
Last Updated: December 7, 2025
Thompson Lake in Rankin, Mississippi, is a private recreational reservoir designed by the USDA NRCS and completed in 1982.
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Summary
The dam, primarily used for recreation, is an earth structure with a height of 11 feet and a hydraulic height of 30 feet. With a storage capacity of 13 acre-feet, the lake covers a surface area of 2 acres and drains a small watershed area of 0.09 square miles into the TR- Tippah River.
Despite being labeled as having a low hazard potential and a moderate risk assessment, the condition of Thompson Lake's dam is currently not rated. The reservoir features an uncontrolled spillway, uncontrolled outlet gates, and no associated locks. While the dam has not been inspected recently and lacks an emergency action plan, the risk management measures and inundation maps have not been prepared. Although the risk assessment is moderate, the overall safety and maintenance of Thompson Lake may warrant further evaluation and improvements to ensure the protection of the surrounding community and water resources.
Water resource and climate enthusiasts interested in Thompson Lake can appreciate its recreational value and the opportunity it provides for outdoor activities. As a private reservoir in a picturesque setting, the lake offers a tranquil escape for fishing, boating, and wildlife observation. While the dam's condition assessment and risk management measures may be lacking, the potential for enhancing safety protocols and environmental stewardship at Thompson Lake could further contribute to its sustainability and enjoyment for future generations.
Year Completed |
1982 |
Dam Length |
450 |
Dam Height |
11 |
River Or Stream |
TR- TIPPAH RIVER |
Primary Dam Type |
Earth |
Surface Area |
2 |
Hydraulic Height |
30 |
Drainage Area |
0.09 |
Nid Storage |
13 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Pearl River At Jackson
|
738cfs |
Strong River At D`Lo
|
222cfs |
Lynch Creek At Jackson
|
1100cfs |
Pearl River Nr Rockport
|
1670cfs |
Hanging Moss Creek Nr Jackson
|
356cfs |
Pearl River Nr Monticello
|
1750cfs |
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.
Thompson Lake