Lucky Friday No 4
Key Takeaway
Lucky Friday No 4 is classified as high hazard in Idaho. It was completed in 2010 and is 16 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 Height | 132 ft (taller than 95.6% in ID) |
| Dam Length | 2,070 ft |
| Normal Storage | 624 acre-ft |
| Surface Area | 16 acres |
| Drainage Area | 0 sq mi |
| Year Completed | 2010 (16 years old) |
| Year Modified | 2012 |
| NID ID | ID00728 |
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
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Lucky Friday No 4?
Lucky Friday No 4 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 Lucky Friday No 4?
Lucky Friday No 4 is owned by information not available (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lucky Friday No 4 built?
Lucky Friday No 4 was completed in 2010, making it 16 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 Lucky Friday No 4?
Lucky Friday No 4 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 Lucky Friday No 4?
Lucky Friday No 4 has a dam height of 132 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 Lucky Friday No 4 last inspected?
Lucky Friday No 4 was last inspected on July 30, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.