Aii Reservoir
Key Takeaway
Aii Reservoir is classified as high hazard in Hawaii. It was completed in 1920 and is 106 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 | 21 ft (taller than 15.7% in HI) |
| Dam Length | 350 ft |
| Dam Type | Earth |
| Max Storage | 68 acre-ft |
| Normal Storage | 68 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 0 sq mi |
| Year Completed | 1920 (106 years old) |
| NID ID | HI00011 |
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
Grove Farm Company
Private
Nearby Dams
Kapaia Reservoir
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High Hazard 25 ftAahoaka Reservoir
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High Hazard 40 ftTwin Reservoirs
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High Hazard 49 ftKauai Lagoons
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High Hazard 15 ftHalenanahu Reservoir
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High Hazard 35 ftLower Kapahi Reservoir
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High Hazard 20 ftFrequently Asked Questions
What is the hazard classification of Aii Reservoir?
Aii 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 Aii Reservoir?
Aii Reservoir is owned by Grove Farm Company (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Aii Reservoir built?
Aii Reservoir was completed in 1920, making it 106 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 Aii Reservoir?
Aii 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 Aii Reservoir?
Aii Reservoir has a dam height of 21 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 Aii Reservoir last inspected?
Aii Reservoir was last inspected on August 5, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.