Northshore Mining
Key Takeaway
Northshore Mining is classified as high hazard in Minnesota. It was completed in 1977 and is 49 years old. Its primary use is tailings. 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 Length | 26,000 ft |
| Dam Type | Earth |
| Max Storage | 31.5K acre-ft |
| Normal Storage | 15.8K acre-ft |
| Surface Area | 1,575 acres |
| Drainage Area | 4 sq mi |
| Year Completed | 1977 (49 years old) |
| NID ID | MN01477 |
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
Cliff-Erie
Private
Frequently Asked Questions
What is the hazard classification of Northshore Mining?
Northshore Mining 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 Northshore Mining?
Northshore Mining is owned by Cliff-Erie (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Northshore Mining built?
Northshore Mining was completed in 1977, making it 49 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 Northshore Mining?
Northshore Mining serves the following purposes: Tailings. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was Northshore Mining last inspected?
Northshore Mining was last inspected on September 19, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.