Helemano 6 Reservoir
Key Takeaway
Helemano 6 Reservoir is classified as high hazard in Hawaii. It was completed in 1915 and is 111 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 | 36 ft (taller than 53.5% in HI) |
| Dam Length | 250 ft |
| Dam Type | Earth |
| Max Storage | 80 acre-ft |
| Normal Storage | 66 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1915 (111 years old) |
| NID ID | HI00023 |
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
Dole Food Company Hawaii
Private
Nearby Dams
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High Hazard 66 ftUpper Helemano Reservoir
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Low Hazard 70 ftMaunaolu Reservoir
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High Hazard 27 ftFrequently Asked Questions
What is the hazard classification of Helemano 6 Reservoir?
Helemano 6 Reservoir 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 Helemano 6 Reservoir?
Helemano 6 Reservoir is owned by Dole Food Company Hawaii (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Helemano 6 Reservoir built?
Helemano 6 Reservoir was completed in 1915, making it 111 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 Helemano 6 Reservoir?
Helemano 6 Reservoir 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 Helemano 6 Reservoir?
Helemano 6 Reservoir has a dam height of 36 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 Helemano 6 Reservoir last inspected?
Helemano 6 Reservoir was last inspected on September 9, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.