Willow Run Hydro Dam
Key Takeaway
Willow Run Hydro Dam is classified as low hazard in Michigan. It was completed in 1941 and is 85 years old. Its primary use is recreation.
Physical Details
| Dam Height | 20 ft (taller than 70.3% in MI) |
| Dam Length | 184 ft |
| Dam Type | Concrete |
| Max Storage | 79 acre-ft |
| Normal Storage | 47 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 930 cfs |
| Year Completed | 1941 (85 years old) |
| NID ID | MI00944 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Washtenaw County Drain Commissioner
Private
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What is the hazard classification of Willow Run Hydro Dam?
Willow Run Hydro Dam is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Willow Run Hydro Dam?
Willow Run Hydro Dam is owned by Washtenaw County Drain Commissioner (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Willow Run Hydro Dam built?
Willow Run Hydro Dam was completed in 1941, making it 85 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 Willow Run Hydro Dam?
Willow Run Hydro 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 Willow Run Hydro Dam?
Willow Run Hydro Dam has a dam height of 20 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 Willow Run Hydro Dam last inspected?
Willow Run Hydro Dam was last inspected on October 23, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.