Maui Reservoir 20
Key Takeaway
Maui Reservoir 20 is classified as high hazard in Hawaii. It was completed in 1913 and is 113 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 | 42 ft (taller than 68.5% in HI) |
| Dam Length | 1,320 ft |
| Dam Type | Earth |
| Max Storage | 165 acre-ft |
| Normal Storage | 150 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 72 cfs |
| Year Completed | 1913 (113 years old) |
| NID ID | HI00070 |
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
MP East A, LLC, a Delaware limited liability company
Private
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High Hazard 30 ftFrequently Asked Questions
What is the hazard classification of Maui Reservoir 20?
Maui Reservoir 20 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 Maui Reservoir 20?
Maui Reservoir 20 is owned by MP East A, LLC, a Delaware limited liability company (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Maui Reservoir 20 built?
Maui Reservoir 20 was completed in 1913, making it 113 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 Maui Reservoir 20?
Maui Reservoir 20 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 Maui Reservoir 20?
Maui Reservoir 20 has a dam height of 42 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 Maui Reservoir 20 last inspected?
Maui Reservoir 20 was last inspected on October 18, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.