Woodrat Knob
Key Takeaway
Woodrat Knob is classified as high hazard in Oregon. It was completed in 1960 and is 66 years old. Its primary use is irrigation. 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 | 90 ft (taller than 93.4% in OR) |
| Dam Length | 1,320 ft |
| Dam Type | Earth |
| Max Storage | 1.8K acre-ft |
| Normal Storage | 1.8K acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 240 cfs |
| Year Completed | 1960 (66 years old) |
| NID ID | OR00357 |
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
CASCADE RANCH, CHICAGO 60614
Private
Nearby Dams
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Significant Hazard 26 ftLake Creek
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High Hazard 77 ftOwen
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Low Hazard 31 ftStanley, Charles W. Reservoir
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Low Hazard 41 ftFrequently Asked Questions
What is the hazard classification of Woodrat Knob?
Woodrat Knob 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 Woodrat Knob?
Woodrat Knob is owned by CASCADE RANCH, CHICAGO 60614 (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Woodrat Knob built?
Woodrat Knob was completed in 1960, making it 66 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 Woodrat Knob?
Woodrat Knob serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Woodrat Knob?
Woodrat Knob has a dam height of 90 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 Woodrat Knob last inspected?
Woodrat Knob was last inspected on July 13, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.