Asamera Cannon Mine Tailings Dam
Key Takeaway
Asamera Cannon Mine Tailings Dam is classified as high hazard in Washington. It was completed in 1986 and is 40 years old. Its primary use is flood risk reduction. 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 | 1,150 ft |
| Dam Type | Earth |
| Max Storage | 950 acre-ft |
| Normal Storage | 540 acre-ft |
| Surface Area | 2,500 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 1,370 cfs |
| Year Completed | 1986 (40 years old) |
| Year Modified | 1996 |
| NID ID | WA00499 |
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
ConocoPhillips
Private
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High HazardFrequently Asked Questions
What is the hazard classification of Asamera Cannon Mine Tailings Dam?
Asamera Cannon Mine Tailings Dam 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 Asamera Cannon Mine Tailings Dam?
Asamera Cannon Mine Tailings Dam is owned by ConocoPhillips (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Asamera Cannon Mine Tailings Dam built?
Asamera Cannon Mine Tailings Dam was completed in 1986, making it 40 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 Asamera Cannon Mine Tailings Dam?
Asamera Cannon Mine Tailings Dam serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was Asamera Cannon Mine Tailings Dam last inspected?
Asamera Cannon Mine Tailings Dam was last inspected on October 13, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.