Oahu Reservoir 155
Key Takeaway
Oahu Reservoir 155 is classified as high hazard in Hawaii. It was completed in 1916 and is 110 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 | 25 ft (taller than 21.3% in HI) |
| Dam Length | 900 ft |
| Dam Type | Earth |
| Max Storage | 37 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 110 cfs |
| Year Completed | 1916 (110 years old) |
| NID ID | HI00137 |
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
Bayer U.S. - Crop Science, Monsanto Company, Hawaii Dept of Agriculture - ADC, Monsanto Company
State Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Oahu Reservoir 155?
Oahu Reservoir 155 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 Oahu Reservoir 155?
Oahu Reservoir 155 is owned by Bayer U.S. - Crop Science, Monsanto Company, Hawaii Dept of Agriculture - ADC, Monsanto Company (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Oahu Reservoir 155 built?
Oahu Reservoir 155 was completed in 1916, making it 110 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 Oahu Reservoir 155?
Oahu Reservoir 155 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 Oahu Reservoir 155?
Oahu Reservoir 155 has a dam height of 25 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 Oahu Reservoir 155 last inspected?
Oahu Reservoir 155 was last inspected on February 24, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.