Halenanahu Reservoir
High HazardUnsatisfactory ConditionEmergency Action Plan: Yes
Location
| County | Kauai |
| Nearest City | Kipu |
| River/Stream | HALENANHU STREAM |
| Coordinates | 21.96497, -159.43208 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 40 ft |
| Dam Height | 35 ft |
| Dam Length | 650 ft |
| Year Completed | 1920 (106 years old) |
Storage & Hydraulics
| NID Storage | 460 acre-ft |
| Max Storage | 460 acre-ft |
| Normal Storage | 460 acre-ft |
| Surface Area | 22 acres |
| Drainage Area | 1 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Grove Farm Company |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Unsatisfactory |
| Last Inspection | 11/06/2025 |
| Emergency Action Plan | Yes |