Ku Tree Reservoir
Ku Tree Reservoir is an earth dam located in Honolulu County, Hawaii, built in 1925. It carries a High hazard potential classification and has a unsatisfactory condition assessment.
About Ku Tree Reservoir
Ku Tree Reservoir is a dam in Honolulu, Hawaii. The dam is owned by Schofield Barracks (federal). It impounds the S Fork Kaukonahua near Wahiawa.
The dam stands 90 feet tall and stretches 550 feet across, creates a reservoir covering 22 acres, has a maximum storage capacity of 970 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1925, the structure is over a century old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated unsatisfactory, indicating serious safety deficiencies exist that require immediate attention or remedial action. An emergency action plan is in place for this dam. The most recent inspection on record was 06/22/2022.
At 90 feet, this dam is taller than 98% of all dams in the United States.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Hawaii dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Hawaii |
| County | Honolulu |
| Nearest City | Wahiawa |
| River/Stream | S Fork Kaukonahua |
| Coordinates | 21.49800, -157.98100 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 90 ft |
| Dam Height | 90 ft |
| Dam Length | 550 ft |
| Year Completed | 1925 (101 years old) |
Storage & Hydraulics
| NID Storage | 970 acre-ft |
| Max Storage | 970 acre-ft |
| Normal Storage | 880 acre-ft |
| Surface Area | 22 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 5,600 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | Schofield Barracks |
| Owner Type | Federal |
| Hazard Classification | High |
| Condition Assessment | Unsatisfactory |
| Last Inspection | 06/22/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | HI00025 |
| Federal ID | HI00025 |
| More Info | State Dam Safety Program |