Nuuanu Dam No. 4
High HazardFair ConditionEmergency Action Plan: Yes
Location
| County | Honolulu |
| Nearest City | HONOLULU |
| River/Stream | NUUANU STREAM |
| Coordinates | 21.35263, -157.80781 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 73 ft |
| Dam Height | 66 ft |
| Dam Length | 2,120 ft |
| Year Completed | 1910 (116 years old) |
Storage & Hydraulics
| NID Storage | 3,600 acre-ft |
| Max Storage | 3,600 acre-ft |
| Normal Storage | 242 acre-ft |
| Surface Area | 25 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 4,000 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Honolulu Board of Water Supply |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 04/04/2024 |
| Emergency Action Plan | Yes |