Nuuanu Reservoir No. 1
High HazardPoor ConditionEmergency Action Plan: Yes
Location
| County | Honolulu |
| Coordinates | 21.33968, -157.83740 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 34 ft |
| Dam Height | 34 ft |
| Dam Length | 588 ft |
| Year Completed | 1905 (121 years old) |
Storage & Hydraulics
| NID Storage | 63 acre-ft |
| Max Storage | 63 acre-ft |
| Normal Storage | 44 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 428 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 | Poor |
| Last Inspection | 04/04/2024 |
| Emergency Action Plan | Yes |