Aahoaka Reservoir
Key Takeaway
Aahoaka Reservoir is classified as high hazard in Hawaii. It was completed in 1910 and is 116 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 | 550 ft |
| Dam Type | Earth |
| Max Storage | 210 acre-ft |
| Normal Storage | 164 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 1 sq mi |
| Year Completed | 1910 (116 years old) |
| NID ID | HI00063 |
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 Agriculture - ADC
State Government
Nearby Dams
Wailua Reservoir
Kauai, HI
High Hazard 40 ftKapaia Reservoir
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High Hazard 50 ftAii Reservoir
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High Hazard 21 ftOkinawa Reservoir
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High Hazard 25 ftTwin Reservoirs
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High Hazard 49 ftLower Kapahi Reservoir
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High Hazard 20 ftHalenanahu Reservoir
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High Hazard 35 ftMimino Reservoir
Kauai, HI
High Hazard 44 ftFrequently Asked Questions
What is the hazard classification of Aahoaka Reservoir?
Aahoaka 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 Aahoaka Reservoir?
Aahoaka Reservoir is owned by Hawaii Dept of Agriculture - ADC (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Aahoaka Reservoir built?
Aahoaka Reservoir was completed in 1910, making it 116 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 Aahoaka Reservoir?
Aahoaka 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 Aahoaka Reservoir?
Aahoaka 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 Aahoaka Reservoir last inspected?
Aahoaka Reservoir was last inspected on June 30, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.