Stevens Lake Dam Reservoir Report
Last Updated: December 19, 2025
Stevens Lake Dam in Hannibal, Missouri, is a privately owned structure completed in 1963 primarily for recreational purposes.
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Summary
The dam, with a height of 36 feet and a length of 300 feet, impounds the waters of TR South River, creating an 8-acre lake with a storage capacity of 107 acre-feet. Despite not being regulated or inspected by state agencies, the dam is classified as having a high hazard potential, indicating the potential risk of failure and downstream flooding.
Located in Marion County, Missouri, Stevens Lake Dam is under the jurisdiction of the Rock Island District of the US Army Corps of Engineers. The dam, constructed as an earth structure with a buttress core, remains in good condition despite not having a recent condition assessment. With a maximum discharge of 80 cubic feet per second, the dam poses a potential risk to downstream communities in the event of failure, underscoring the importance of regular inspections and maintenance to ensure public safety.
While the dam lacks an Emergency Action Plan and up-to-date inundation maps, it is essential for the owners to address these deficiencies to mitigate potential risks and plan for emergency response in case of a dam failure. As water resource and climate enthusiasts, it is crucial to monitor the condition of dams like Stevens Lake Dam to safeguard against potential disasters and ensure the sustainable management of our water resources in the face of changing climate conditions.
Year Completed |
1963 |
Dam Length |
300 |
Dam Height |
36 |
River Or Stream |
TR SOUTH RIVER |
Primary Dam Type |
Earth |
Surface Area |
8 |
Drainage Area |
398 |
Nid Storage |
107 |
Structural Height |
36 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
36 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
North River At Palmyra
|
17cfs |
Bear Creek At Hannibal
|
2cfs |
South Fabius River Near Taylor
|
12cfs |
Salt River Near New London
|
106cfs |
Salt River Near Center
|
57cfs |
Spencer Cr. Bl Plum Cr. Nr Frankford
|
24cfs |
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.
Stevens Lake Dam