Opaeula 01 Reservoir
Key Takeaway
Opaeula 01 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 | 66 ft (taller than 92.1% in HI) |
| Dam Length | 250 ft |
| Dam Type | Earth |
| Max Storage | 320 acre-ft |
| Normal Storage | 186 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1910 (116 years old) |
| Year Modified | 2011 |
| NID ID | HI00018 |
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
Kamehameha Schools
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Opaeula 01 Reservoir?
Opaeula 01 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 Opaeula 01 Reservoir?
Opaeula 01 Reservoir is owned by Kamehameha Schools (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Opaeula 01 Reservoir built?
Opaeula 01 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 Opaeula 01 Reservoir?
Opaeula 01 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 Opaeula 01 Reservoir?
Opaeula 01 Reservoir has a dam height of 66 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 Opaeula 01 Reservoir last inspected?
Opaeula 01 Reservoir was last inspected on March 15, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.