Waikoloi Reservoir
Key Takeaway
Waikoloi Reservoir is classified as high hazard in Hawaii. It was completed in 1958 and is 68 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 | 64 ft (taller than 90.6% in HI) |
| Dam Length | 505 ft |
| Dam Type | Earth |
| Max Storage | 147 acre-ft |
| Normal Storage | 130 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 0 sq mi |
| Year Completed | 1958 (68 years old) |
| NID ID | HI00008 |
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
Robinson Family Partners
Private
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What is the hazard classification of Waikoloi Reservoir?
Waikoloi 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 Waikoloi Reservoir?
Waikoloi Reservoir is owned by Robinson Family Partners (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Waikoloi Reservoir built?
Waikoloi Reservoir was completed in 1958, making it 68 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 Waikoloi Reservoir?
Waikoloi 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 Waikoloi Reservoir?
Waikoloi Reservoir has a dam height of 64 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 Waikoloi Reservoir last inspected?
Waikoloi Reservoir was last inspected on November 2, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.