Minorca Pit South
Key Takeaway
Minorca Pit South is classified as significant hazard in Minnesota. It was completed in 2008 and is 18 years old. Its primary use is tailings. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 30 ft (taller than 82.5% in MN) |
| Dam Length | 600 ft |
| Dam Type | Earth |
| Max Storage | 5.3K acre-ft |
| Normal Storage | 2.1K acre-ft |
| Surface Area | 182 acres |
| Drainage Area | 1 sq mi |
| Year Completed | 2008 (18 years old) |
| Year Modified | 2009 |
| NID ID | MN01543 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
ArcelorMittal
Private
Nearby Dams
Sauntry Creek Settling
St. Louis, MN
Low Hazard 32 ftPlant Site Settling
St. Louis, MN
Significant Hazard 15 ftUpland Cell Ii Interior
St. Louis, MN
Significant Hazard 60 ftInland Steel Tailings
St. Louis, MN
High Hazard 44 ftEly Lake
St. Louis, MN
Low Hazard 6 ftMinntac Tailings
St. Louis, MN
Low Hazard 50 ftEsquagama Lake
St. Louis, MN
Low Hazard 9 ftWest Two River
St. Louis, MN
Significant Hazard 40 ftFrequently Asked Questions
What is the hazard classification of Minorca Pit South?
Minorca Pit South is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Minorca Pit South?
Minorca Pit South is owned by ArcelorMittal (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Minorca Pit South built?
Minorca Pit South was completed in 2008, making it 18 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 Minorca Pit South?
Minorca Pit South serves the following purposes: Tailings. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Minorca Pit South?
Minorca Pit South has a dam height of 30 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 Minorca Pit South last inspected?
Minorca Pit South was last inspected on September 29, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.