Den Hoed Dam No 1
Key Takeaway
Den Hoed Dam No 1 is classified as high hazard in Washington. It was completed in 1999 and is 27 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 Length | 780 ft |
| Dam Type | Earth |
| Max Storage | 23 acre-ft |
| Normal Storage | 19 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 18 sq mi |
| Max Discharge | 58 cfs |
| Year Completed | 1999 (27 years old) |
| NID ID | WA01948 |
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
Sunnyside South Ranch LLC
Private
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High HazardFrequently Asked Questions
What is the hazard classification of Den Hoed Dam No 1?
Den Hoed Dam No 1 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 Den Hoed Dam No 1?
Den Hoed Dam No 1 is owned by Sunnyside South Ranch LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Den Hoed Dam No 1 built?
Den Hoed Dam No 1 was completed in 1999, making it 27 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 Den Hoed Dam No 1?
Den Hoed Dam No 1 serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was Den Hoed Dam No 1 last inspected?
Den Hoed Dam No 1 was last inspected on October 29, 2015. Inspection dates indicate when a formal review occurred, not the results of that inspection.