Lake Byllesby Perimeter Embankment
Key Takeaway
Lake Byllesby Perimeter Embankment is classified as high hazard in Minnesota. It was completed in 1911 and is 115 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 | 6 ft (taller than 1.9% in MN) |
| Dam Length | 2,000 ft |
| Dam Type | Earth |
| Max Storage | 24.0K acre-ft |
| Normal Storage | 18.5K acre-ft |
| Surface Area | 1,430 acres |
| Drainage Area | 1,160 sq mi |
| Max Discharge | 94,500 cfs |
| Year Completed | 1911 (115 years old) |
| NID ID | MN00514 |
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
Dakota And Goodhue Counties
Local Government
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Significant Hazard 26 ftFrequently Asked Questions
What is the hazard classification of Lake Byllesby Perimeter Embankment?
Lake Byllesby Perimeter Embankment 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 Byllesby Perimeter Embankment?
Lake Byllesby Perimeter Embankment is owned by Dakota And Goodhue Counties (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lake Byllesby Perimeter Embankment built?
Lake Byllesby Perimeter Embankment was completed in 1911, making it 115 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 Byllesby Perimeter Embankment?
Lake Byllesby Perimeter Embankment serves the following purposes: Hydroelectric, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Lake Byllesby Perimeter Embankment?
Lake Byllesby Perimeter Embankment has a dam height of 6 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 Byllesby Perimeter Embankment last inspected?
Lake Byllesby Perimeter Embankment was last inspected on September 13, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.