Mauka Reservoir
Key Takeaway
Mauka 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 | 19 ft (taller than 8.7% in HI) |
| Dam Length | 550 ft |
| Dam Type | Earth |
| Max Storage | 345 acre-ft |
| Normal Storage | 110 acre-ft |
| Surface Area | 23 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 2,193 cfs |
| Year Completed | 1910 (116 years old) |
| NID ID | HI00119 |
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
Eric A. Knudsen Trust
Private
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High Hazard 70 ftFrequently Asked Questions
What is the hazard classification of Mauka Reservoir?
Mauka 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 Mauka Reservoir?
Mauka Reservoir is owned by Eric A. Knudsen Trust (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mauka Reservoir built?
Mauka 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 Mauka Reservoir?
Mauka 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 Mauka Reservoir?
Mauka Reservoir has a dam height of 19 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 Mauka Reservoir last inspected?
Mauka Reservoir was last inspected on September 7, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.