Island Lake North Dike
Key Takeaway
Island Lake North Dike is classified as high hazard in Minnesota. It was completed in 1915 and is 111 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 | 21 ft (taller than 63.7% in MN) |
| Dam Length | 1,100 ft |
| Dam Type | Earth |
| Max Storage | 177.0K acre-ft |
| Normal Storage | 166.0K acre-ft |
| Surface Area | 10,800 acres |
| Max Discharge | 7,445 cfs |
| Year Completed | 1915 (111 years old) |
| NID ID | MN00612 |
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
Allete, Inc.
Private
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What is the hazard classification of Island Lake North Dike?
Island Lake North Dike 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 Island Lake North Dike?
Island Lake North Dike is owned by Allete, Inc. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Island Lake North Dike built?
Island Lake North Dike was completed in 1915, making it 111 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 Island Lake North Dike?
Island Lake North Dike 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 Island Lake North Dike?
Island Lake North Dike has a dam height of 21 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 Island Lake North Dike last inspected?
Island Lake North Dike was last inspected on September 23, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.