Yankee
Key Takeaway
Yankee is classified as high hazard in Oregon. It was completed in 1951 and is 75 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 | 55 ft (taller than 85.6% in OR) |
| Dam Length | 970 ft |
| Dam Type | Earth |
| Max Storage | 1.1K acre-ft |
| Normal Storage | 925 acre-ft |
| Surface Area | 45 acres |
| Drainage Area | 7 sq mi |
| Max Discharge | 1,418 cfs |
| Year Completed | 1951 (75 years old) |
| NID ID | OR00222 |
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
MURPHY CLARK
Private
Nearby Dams
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Low Hazard 31 ftWoolfolk Reservoir
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Significant Hazard 47 ftBradshaw
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Significant Hazard 47 ftFrog Pond #1
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Significant Hazard 22 ftHarrison
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Significant Hazard 26 ftWoodrat Knob
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High Hazard 90 ftFrequently Asked Questions
What is the hazard classification of Yankee?
Yankee 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 Yankee?
Yankee is owned by MURPHY CLARK (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Yankee built?
Yankee was completed in 1951, making it 75 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 Yankee?
Yankee 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 Yankee?
Yankee has a dam height of 55 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 Yankee last inspected?
Yankee was last inspected on October 15, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.