Oconomowoc Lake
Key Takeaway
Oconomowoc Lake is classified as low hazard in Wisconsin. It was completed in 1899 and is 127 years old. Its primary use is recreation.
Physical Details
| Dam Height | 7 ft (taller than 1% in WI) |
| Dam Length | 60 ft |
| Dam Type | Gravity |
| Max Storage | 1.8K acre-ft |
| Normal Storage | 5.0K acre-ft |
| Surface Area | 721 acres |
| Drainage Area | 87 sq mi |
| Max Discharge | 1,790 cfs |
| Year Completed | 1899 (127 years old) |
| NID ID | WI01144 |
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
VILLAGE OF OCONOMOWOC LAKE
Local Government
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Low Hazard 9 ftFrequently Asked Questions
What is the hazard classification of Oconomowoc Lake?
Oconomowoc Lake 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 Oconomowoc Lake?
Oconomowoc Lake is owned by VILLAGE OF OCONOMOWOC LAKE (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Oconomowoc Lake built?
Oconomowoc Lake was completed in 1899, making it 127 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 Oconomowoc Lake?
Oconomowoc Lake 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 Oconomowoc Lake?
Oconomowoc Lake has a dam height of 7 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 Oconomowoc Lake last inspected?
Oconomowoc Lake was last inspected on August 17, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.