Lake Harmony Dam Reservoir Report
Nearby: Mine Lamotte Dam Slime Pond Dam
Last Updated: December 6, 2025
Lake Harmony Dam, located in Fredericktown, Missouri, stands as a historic gravity dam built in 1870 with a primary purpose of recreation.
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Summary
The dam boasts a height of 21 feet and a maximum storage capacity of 416 acre-feet, providing a serene 37-acre surface area for water enthusiasts to enjoy. Despite being privately owned, the dam is not regulated by the state and has not undergone recent inspections, raising concerns about its high hazard potential.
While the dam's condition assessment remains unrated, its age and lack of recent evaluations highlight potential risks associated with its structural integrity. With a history dating back over a century, Lake Harmony Dam serves as a reminder of the importance of regular maintenance and inspection to ensure the safety of both the dam and the surrounding community. As climate change continues to impact water resources, it becomes crucial for dam owners and regulatory agencies to prioritize safety measures and risk assessments to mitigate any potential disasters.
Year Completed |
1870 |
Dam Height |
21 |
River Or Stream |
TR-LITTLE ST FRANCOIS RIVER |
Primary Dam Type |
Gravity |
Surface Area |
37 |
Drainage Area |
2175 |
Nid Storage |
416 |
Structural Height |
21 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
21 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Lake Harmony Dam