Lac Marseilles Dam
Key Takeaway
Lac Marseilles Dam is classified as high hazard in Missouri. It was completed in 1971 and is 55 years old. Its primary use is recreation. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 69 ft (taller than 98.4% in MO) |
| Dam Length | 1,185 ft |
| Dam Type | Earth |
| Max Storage | 1.9K acre-ft |
| Normal Storage | 1.9K acre-ft |
| Surface Area | 56 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 2,400 cfs |
| Year Completed | 1971 (55 years old) |
| NID ID | MO30282 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
TERRE DU LAC POA
Private
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High Hazard 39 ftFrequently Asked Questions
What is the hazard classification of Lac Marseilles Dam?
Lac Marseilles Dam is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Lac Marseilles Dam?
Lac Marseilles Dam is owned by TERRE DU LAC POA (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lac Marseilles Dam built?
Lac Marseilles Dam was completed in 1971, making it 55 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Lac Marseilles Dam?
Lac Marseilles Dam serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Lac Marseilles Dam?
Lac Marseilles Dam has a dam height of 69 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Lac Marseilles Dam last inspected?
Lac Marseilles Dam was last inspected on December 8, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.