Honokowai Reservoir
Key Takeaway
Honokowai Reservoir is classified as high hazard in Hawaii. It was completed in 1918 and is 108 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 | 31 ft (taller than 40.9% in HI) |
| Dam Length | 317 ft |
| Dam Type | Earth |
| Max Storage | 12 acre-ft |
| Normal Storage | 10 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 0 sq mi |
| Year Completed | 1918 (108 years old) |
| Year Modified | 1999 |
| NID ID | HI00058 |
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
Maui County, Dept of Environmental Mgmt
Private
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High Hazard 30 ftFrequently Asked Questions
What is the hazard classification of Honokowai Reservoir?
Honokowai 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 Honokowai Reservoir?
Honokowai Reservoir is owned by Maui County, Dept of Environmental Mgmt (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Honokowai Reservoir built?
Honokowai Reservoir was completed in 1918, making it 108 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 Honokowai Reservoir?
Honokowai 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 Honokowai Reservoir?
Honokowai Reservoir has a dam height of 31 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 Honokowai Reservoir last inspected?
Honokowai Reservoir was last inspected on August 11, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.