Upper Anahola Reservoir
Key Takeaway
Upper Anahola Reservoir is classified as low hazard in Hawaii. It was completed in 1920 and is 106 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 27 ft (taller than 29.9% in HI) |
| Dam Length | 450 ft |
| Dam Type | Earth |
| Max Storage | 110 acre-ft |
| Normal Storage | 83 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Year Completed | 1920 (106 years old) |
| NID ID | HI00065 |
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
Hawaii Dept of Hawaiian Home Lands
State Government
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High Hazard 27 ftFrequently Asked Questions
What is the hazard classification of Upper Anahola Reservoir?
Upper Anahola Reservoir 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 Upper Anahola Reservoir?
Upper Anahola Reservoir is owned by Hawaii Dept of Hawaiian Home Lands (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Upper Anahola Reservoir built?
Upper Anahola 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 Upper Anahola Reservoir?
Upper Anahola 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 Upper Anahola Reservoir?
Upper Anahola Reservoir has a dam height of 27 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 Upper Anahola Reservoir last inspected?
Upper Anahola Reservoir was last inspected on October 13, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.