South Zumbro Wr-6a
Key Takeaway
South Zumbro Wr-6a is classified as high hazard in Minnesota. It was completed in 1989 and is 37 years old. Its primary use is flood risk reduction. 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 | 56 ft (taller than 97.6% in MN) |
| Dam Length | 1,600 ft |
| Dam Type | Earth |
| Max Storage | 1.7K acre-ft |
| Normal Storage | 621 acre-ft |
| Surface Area | 72 acres |
| Drainage Area | 9 sq mi |
| Max Discharge | 131 cfs |
| Year Completed | 1989 (37 years old) |
| NID ID | MN00990 |
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
Nearby Dams
South Zumbro Wr-4
Olmsted, MN
High Hazard 21 ftMayowood Lake
Olmsted, MN
Low Hazard 20 ftSilver Lake
Olmsted, MN
Significant Hazard 18 ftSouth Zumbro Kr-6
Olmsted, MN
High Hazard 31 ftSouth Zumbro Kr-7
Olmsted, MN
High Hazard 22 ftGlen Herman Stabilizer
Olmsted, MN
Low Hazard 26 ftSouth Zumbro Kr-3
Olmsted, MN
High Hazard 20 ftRochester 50th Ave Nw
Olmsted, MN
Significant Hazard 28 ftFrequently Asked Questions
What is the hazard classification of South Zumbro Wr-6a?
South Zumbro Wr-6a 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 South Zumbro Wr-6a?
South Zumbro Wr-6a is owned by City of Rochester (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was South Zumbro Wr-6a built?
South Zumbro Wr-6a was completed in 1989, making it 37 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 South Zumbro Wr-6a?
South Zumbro Wr-6a serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is South Zumbro Wr-6a?
South Zumbro Wr-6a has a dam height of 56 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 South Zumbro Wr-6a last inspected?
South Zumbro Wr-6a was last inspected on May 10, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.