Lac Marseilles Dam Reservoir Report
Nearby: Lac Capri Dam Lac Tiffany Dam
Last Updated: December 17, 2025
Lac Marseilles Dam, located in Leadwood, Missouri, is a private-owned structure that serves as a recreational area for water enthusiasts.
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Summary
Completed in 1971, this earth dam stands at a height of 69 feet and spans a length of 1185 feet, creating a reservoir with a storage capacity of 1900 acre-feet. The dam is situated on the TR-Big River, contributing to a surface area of 56 acres and draining a watershed area of 380 acres.
Managed by the DAM AND RESERVOIR SAFETY PROG in Missouri, Lac Marseilles Dam is regulated and inspected regularly to ensure its safety and compliance with state standards. With a hazard potential rated as high, the dam's condition is deemed satisfactory as of the last assessment in 2007. Despite the moderate risk associated with the structure, risk management measures are in place to mitigate any potential threats and ensure the safety of the surrounding community.
As a popular spot for recreational activities, Lac Marseilles Dam offers opportunities for fishing, boating, and other water-based pursuits. The dam's location in St. Francois County, Missouri, makes it an ideal destination for water resource and climate enthusiasts looking to explore the intersection of man-made structures and natural environments. With its impressive design and capacity for storage and drainage, Lac Marseilles Dam stands as a testament to the importance of responsible water management in the face of changing climate patterns.
Year Completed |
1971 |
Dam Length |
1185 |
Dam Height |
69 |
River Or Stream |
TR-BIG RIVER |
Primary Dam Type |
Earth |
Surface Area |
56 |
Drainage Area |
380 |
Nid Storage |
1900 |
Structural Height |
69 |
Outlet Gates |
None |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
69 |
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.
Lac Marseilles Dam