St. John Commons Dam
Key Takeaway
St. John Commons Dam is classified as high hazard in Indiana. It was completed in 2002 and is 24 years old. Its primary use is other. 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 | 29 ft (taller than 59.3% in IN) |
| Dam Length | 300 ft |
| Dam Type | Earth |
| Max Storage | 150 acre-ft |
| Normal Storage | 108 acre-ft |
| Surface Area | 15 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 4,368 cfs |
| Year Completed | 2002 (24 years old) |
| NID ID | IN03998 |
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
St. John Commons Home Owners Association
Private
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Significant Hazard 34 ftFrequently Asked Questions
What is the hazard classification of St. John Commons Dam?
St. John Commons 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 St. John Commons Dam?
St. John Commons Dam is owned by St. John Commons Home Owners Association (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was St. John Commons Dam built?
St. John Commons Dam was completed in 2002, making it 24 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. John Commons Dam?
St. John Commons Dam serves the following purposes: Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is St. John Commons Dam?
St. John Commons Dam has a dam height of 29 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. John Commons Dam last inspected?
St. John Commons Dam was last inspected on August 11, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.