Lower Nine Mile
Key Takeaway
Lower Nine Mile is classified as low hazard in Wisconsin. It was completed in 1907 and is 119 years old. Its primary use is hydroelectric.
Physical Details
| Dam Height | 12 ft (taller than 30.4% in WI) |
| Dam Length | 186 ft |
| Dam Type | Gravity |
| Max Storage | 2.6K acre-ft |
| Drainage Area | 29 sq mi |
| Max Discharge | 704 cfs |
| Year Completed | 1907 (119 years old) |
| NID ID | WI00773 |
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 Valley Improvement Company
Private
Nearby Dams
Burnt Rollways
Oneida, WI
Low Hazard 16 ftCranberry Lake
Vilas, WI
Low Hazard 8 ftSeven Mile
Oneida, WI
Low Hazard 10 ftHaymeadow Dam
Forest, WI
Low Hazard 11 ftMaple Lake
Oneida, WI
High Hazard 12 ftTwin Lakes
Vilas, WI
Low Hazard 10 ftScott Creek Dam
Oneida, WI
Low Hazard 10 ftOtter Rapids
Vilas, WI
High Hazard 20 ftFrequently Asked Questions
What is the hazard classification of Lower Nine Mile?
Lower Nine Mile 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 Lower Nine Mile?
Lower Nine Mile is owned by Wisconsin Valley Improvement Company (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lower Nine Mile built?
Lower Nine Mile was completed in 1907, making it 119 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 Lower Nine Mile?
Lower Nine Mile serves the following purposes: Hydroelectric, Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Lower Nine Mile?
Lower Nine Mile has a dam height of 12 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 Lower Nine Mile last inspected?
Lower Nine Mile was last inspected on June 13, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.