Kehalani Offsite Retention Basin
Key Takeaway
Kehalani Offsite Retention Basin is classified as high hazard in Hawaii. It was completed in 2003 and is 23 years old. Its primary use is flood risk reduction. 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 | 30 ft (taller than 37% in HI) |
| Dam Length | 2,300 ft |
| Dam Type | Earth |
| Max Storage | 490 acre-ft |
| Surface Area | 20 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 2,076 cfs |
| Year Completed | 2003 (23 years old) |
| NID ID | HI00141 |
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
Heona Investments LLC, RCFC Kehalani, LLC
Private
Nearby Dams
Wailuku Water Reservoir 6
Maui, HI
High Hazard 33 ftMaui Reservoir 74
Maui, HI
High Hazard 25 ftWailuku Water Reservoir 10
Maui, HI
High Hazard 52 ftMaui Reservoir 73
Maui, HI
High Hazard 25 ftMaui Reservoir 92
Maui, HI
High Hazard 16 ftHappy Valley Flood Prevention
Maui, HI
High Hazard 16 ftMaui Reservoir 90
Maui, HI
High Hazard 13 ftMaui Reservoir 70
Maui, HI
High Hazard 16 ftFrequently Asked Questions
What is the hazard classification of Kehalani Offsite Retention Basin?
Kehalani Offsite Retention Basin 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 Kehalani Offsite Retention Basin?
Kehalani Offsite Retention Basin is owned by Heona Investments LLC, RCFC Kehalani, LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Kehalani Offsite Retention Basin built?
Kehalani Offsite Retention Basin was completed in 2003, making it 23 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 Kehalani Offsite Retention Basin?
Kehalani Offsite Retention Basin serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Kehalani Offsite Retention Basin?
Kehalani Offsite Retention Basin has a dam height of 30 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 Kehalani Offsite Retention Basin last inspected?
Kehalani Offsite Retention Basin was last inspected on December 14, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.