O'sullivan Dam
High HazardNot Available ConditionEmergency Action Plan: Yes
Location
| State | Washington |
| County | Grant |
| Nearest City | SYMINA |
| River/Stream | LOWER CRAB CREEK |
| Coordinates | 46.98200, -119.29080 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 200 ft |
| Dam Height | 200 ft |
| Dam Length | 19,000 ft |
| Year Completed | 1949 (77 years old) |
Storage & Hydraulics
| NID Storage | 546,300 acre-ft |
| Max Storage | 546,300 acre-ft |
| Normal Storage | 511,700 acre-ft |
| Surface Area | 27,800 acres |
| Drainage Area | 79,162 sq mi |
| Max Discharge | 29,600 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | BUREAU OF RECLAMATION |
| Owner Type | Federal |
| Hazard Classification | High |
| Condition Assessment | Not Available |
| Last Inspection | 08/18/2023 |
| Emergency Action Plan | Yes |