St Louis
Key Takeaway
St Louis is classified as significant hazard in Michigan. It was completed in 1901 and is 125 years old. Its primary use is hydroelectric. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 21 ft (taller than 74.1% in MI) |
| Dam Length | 126 ft |
| Dam Type | Gravity |
| Max Storage | 1.6K acre-ft |
| Normal Storage | 885 acre-ft |
| Surface Area | 225 acres |
| Drainage Area | 288 sq mi |
| Max Discharge | 7,200 cfs |
| Year Completed | 1901 (125 years old) |
| NID ID | MI00551 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
City of St Louis
Public Utility
Nearby Dams
Frequently Asked Questions
What is the hazard classification of St Louis?
St Louis is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates St Louis?
St Louis is owned by City of St Louis (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was St Louis built?
St Louis was completed in 1901, making it 125 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 St Louis?
St Louis serves the following purposes: Hydroelectric. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is St Louis?
St Louis has a dam height of 21 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 St Louis last inspected?
St Louis was last inspected on May 18, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.