Pioneer Clarification
Key Takeaway
Pioneer Clarification is classified as significant hazard in Minnesota. It was completed in 1961 and is 65 years old. Its primary use is tailings. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 25 ft (taller than 72.3% in MN) |
| Dam Length | 1,000 ft |
| Dam Type | Earth |
| Max Storage | 239 acre-ft |
| Normal Storage | 117 acre-ft |
| Surface Area | 14 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 275 cfs |
| Year Completed | 1961 (65 years old) |
| NID ID | MN00788 |
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
City of Ely
Local Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Pioneer Clarification?
Pioneer Clarification 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 Pioneer Clarification?
Pioneer Clarification is owned by City of Ely (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Pioneer Clarification built?
Pioneer Clarification was completed in 1961, making it 65 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 Pioneer Clarification?
Pioneer Clarification 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 Pioneer Clarification?
Pioneer Clarification has a dam height of 25 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 Pioneer Clarification last inspected?
Pioneer Clarification was last inspected on September 19, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.