Waikamoi Dam No. 2
Key Takeaway
Waikamoi Dam No. 2 is classified as low hazard in Hawaii. It was completed in 1956 and is 70 years old. Its primary use is water supply.
Physical Details
| Dam Height | 34 ft (taller than 47.2% in HI) |
| Dam Length | 98 ft |
| Dam Type | Concrete |
| Max Storage | 61 acre-ft |
| Normal Storage | 32 acre-ft |
| Drainage Area | 2 sq mi |
| Year Completed | 1956 (70 years old) |
| NID ID | HI00046 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Maui County, Dept of Water Supply
Local Government
Nearby Dams
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High Hazard 42 ftKaili Ili Reservoir
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High Hazard 37 ftMaui Field 290 Reservoir
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High Hazard 37 ftFrequently Asked Questions
What is the hazard classification of Waikamoi Dam No. 2?
Waikamoi Dam No. 2 is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Waikamoi Dam No. 2?
Waikamoi Dam No. 2 is owned by Maui County, Dept of Water Supply (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Waikamoi Dam No. 2 built?
Waikamoi Dam No. 2 was completed in 1956, making it 70 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 Waikamoi Dam No. 2?
Waikamoi Dam No. 2 serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Waikamoi Dam No. 2?
Waikamoi Dam No. 2 has a dam height of 34 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 Waikamoi Dam No. 2 last inspected?
Waikamoi Dam No. 2 was last inspected on October 24, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.