Omao Reservoir
High HazardUnsatisfactory ConditionEmergency Action Plan: Yes
Location
| State | Hawaii |
| County | Kauai |
| Nearest City | KOLOA |
| River/Stream | OMAO STREAM |
| Coordinates | 21.92112, -159.48321 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 32 ft |
| Dam Height | 32 ft |
| Dam Length | 454 ft |
| Year Completed | 1915 (111 years old) |
Storage & Hydraulics
| NID Storage | 194 acre-ft |
| Max Storage | 194 acre-ft |
| Normal Storage | 139 acre-ft |
| Surface Area | 8 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 3,000 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Alexander & Baldwin, Inc., Eric A. Knudsen Trust |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Unsatisfactory |
| Last Inspection | 03/06/2025 |
| Emergency Action Plan | Yes |