Grand River Marsh
Key Takeaway
Grand River Marsh is classified as low hazard in Wisconsin. It was completed in 1969 and is 57 years old. Its primary use is other.
Physical Details
| Dam Height | 16 ft (taller than 48.8% in WI) |
| Dam Length | 5,200 ft |
| Dam Type | Earth |
| Max Storage | 22.0K acre-ft |
| Normal Storage | 4.0K acre-ft |
| Surface Area | 2,500 acres |
| Drainage Area | 184 sq mi |
| Max Discharge | 9,580 cfs |
| Year Completed | 1969 (57 years old) |
| NID ID | WI00877 |
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
Wisconsin Department of Natural Resources
State Government
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Low Hazard 12 ftFrench Creek Wildlife Upper
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Low Hazard 10 ftFrequently Asked Questions
What is the hazard classification of Grand River Marsh?
Grand River Marsh 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 Grand River Marsh?
Grand River Marsh is owned by Wisconsin Department of Natural Resources (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Grand River Marsh built?
Grand River Marsh was completed in 1969, making it 57 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 Grand River Marsh?
Grand River Marsh 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 Grand River Marsh?
Grand River Marsh has a dam height of 16 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 Grand River Marsh last inspected?
Grand River Marsh was last inspected on November 8, 2016. Inspection dates indicate when a formal review occurred, not the results of that inspection.