Manchester Mill Dam
Key Takeaway
Manchester Mill Dam is classified as high hazard in Michigan. It was completed in 1908 and is 118 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 | 18 ft (taller than 63.6% in MI) |
| Dam Length | 82 ft |
| Dam Type | Gravity |
| Max Storage | 210 acre-ft |
| Normal Storage | 58 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 144 sq mi |
| Max Discharge | 1,550 cfs |
| Year Completed | 1908 (118 years old) |
| NID ID | MI00715 |
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
Alwicz Holdings
Private
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What is the hazard classification of Manchester Mill Dam?
Manchester Mill 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 Manchester Mill Dam?
Manchester Mill Dam is owned by Alwicz Holdings (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Manchester Mill Dam built?
Manchester Mill Dam was completed in 1908, making it 118 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 Manchester Mill Dam?
Manchester Mill 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 Manchester Mill Dam?
Manchester Mill Dam has a dam height of 18 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 Manchester Mill Dam last inspected?
Manchester Mill Dam was last inspected on September 16, 2016. Inspection dates indicate when a formal review occurred, not the results of that inspection.