Thomason Lake Dam Reservoir Report
Nearby: Garner Dam Temples Lake Dam
Last Updated: January 4, 2026
Thomason Lake Dam in Stoddard, Missouri, is a private earth dam completed in 1964 primarily for recreational purposes.
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Summary
The dam stands at 18 feet high and has a storage capacity of 125 acre-feet, providing water for a surface area of 13 acres. The dam is located in Pyletown on the TR-FISH SLOUGH-ST FRANCIS RIV, within the jurisdiction of the Memphis District of the US Army Corps of Engineers.
Despite being privately owned, Thomason Lake Dam is not regulated or inspected by state agencies, with a low hazard potential and a condition assessment that is not rated. The dam does not have an Emergency Action Plan (EAP) prepared, and it is unclear if it meets guidelines for risk management measures. With no associated structures and no outlet gates, the dam serves as a vital resource for recreational activities in the area, offering a serene environment for water resource and climate enthusiasts to enjoy.
Year Completed |
1964 |
Dam Height |
18 |
River Or Stream |
TR-FISH SLOUGH-ST FRANCIS RIV |
Primary Dam Type |
Earth |
Surface Area |
13 |
Drainage Area |
60 |
Nid Storage |
125 |
Structural Height |
18 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
18 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little River Ditch No. 1 Near Morehouse
|
108cfs |
St. Francis River At Wappapello
|
244cfs |
Black River At Poplar Bluff
|
598cfs |
Castor River At Zalma
|
173cfs |
Little Black River Below Fairdealing
|
59cfs |
Black River Near Corning
|
609cfs |
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.
Thomason Lake Dam