Puukapu Watershed Retarding Dam R-1
Key Takeaway
Puukapu Watershed Retarding Dam R-1 is classified as high hazard in Hawaii. It was completed in 1965 and is 61 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 Height | 12 ft |
| Dam Length | 4,340 ft |
| Dam Type | Earth |
| Max Storage | 1.5K acre-ft |
| Surface Area | 185 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 2,000 cfs |
| Year Completed | 1965 (61 years old) |
| NID ID | HI00043 |
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
Hawaii Dept of Hawaiian Home Lands, Hawaii Dept of Land & Natural Resources
State Government
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What is the hazard classification of Puukapu Watershed Retarding Dam R-1?
Puukapu Watershed Retarding Dam R-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 Puukapu Watershed Retarding Dam R-1?
Puukapu Watershed Retarding Dam R-1 is owned by Hawaii Dept of Hawaiian Home Lands, Hawaii Dept of Land & Natural Resources (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Puukapu Watershed Retarding Dam R-1 built?
Puukapu Watershed Retarding Dam R-1 was completed in 1965, making it 61 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 Puukapu Watershed Retarding Dam R-1?
Puukapu Watershed Retarding Dam R-1 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.
How tall is Puukapu Watershed Retarding Dam R-1?
Puukapu Watershed Retarding Dam R-1 has a dam height of 12 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 Puukapu Watershed Retarding Dam R-1 last inspected?
Puukapu Watershed Retarding Dam R-1 was last inspected on July 22, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.