Lake Zumbro
Key Takeaway
Lake Zumbro is classified as high hazard in Minnesota. It was completed in 1919 and is 107 years old. Its primary use is hydroelectric. 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 | 55 ft (taller than 97.4% in MN) |
| Dam Length | 570 ft |
| Dam Type | Gravity |
| Max Storage | 35.0K acre-ft |
| Normal Storage | 20.0K acre-ft |
| Drainage Area | 845 sq mi |
| Max Discharge | 30,000 cfs |
| Year Completed | 1919 (107 years old) |
| Year Modified | 1996 |
| NID ID | MN00358 |
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
City of Rochester
Local Government
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Low Hazard 27 ftFrequently Asked Questions
What is the hazard classification of Lake Zumbro?
Lake Zumbro 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 Lake Zumbro?
Lake Zumbro is owned by City of Rochester (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lake Zumbro built?
Lake Zumbro was completed in 1919, making it 107 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 Lake Zumbro?
Lake Zumbro serves the following purposes: Hydroelectric. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Lake Zumbro?
Lake Zumbro has a dam height of 55 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 Lake Zumbro last inspected?
Lake Zumbro was last inspected on November 2, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.