Constantine
Key Takeaway
Constantine is classified as high hazard in Michigan. It was completed in 1873 and is 153 years old. Its primary use is hydroelectric. 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 | 11 ft (taller than 26.9% in MI) |
| Dam Length | 1,515 ft |
| Dam Type | Gravity |
| Max Storage | 5.8K acre-ft |
| Normal Storage | 5.8K acre-ft |
| Surface Area | 525 acres |
| Drainage Area | 1,543 sq mi |
| Max Discharge | 21,000 cfs |
| Year Completed | 1873 (153 years old) |
| NID ID | MI00535 |
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
Indiana & Michigan Power Company
Public Utility
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Low Hazard 9 ftFrequently Asked Questions
What is the hazard classification of Constantine?
Constantine 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 Constantine?
Constantine is owned by Indiana & Michigan Power Company (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Constantine built?
Constantine was completed in 1873, making it 153 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 Constantine?
Constantine 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 Constantine?
Constantine has a dam height of 11 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 Constantine last inspected?
Constantine was last inspected on September 8, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.