Grand Coulee Dam
Washington — Okanogan County
Location
| State | Washington |
| County | Okanogan |
| Coordinates | 47.95660, -118.98050 |
Physical Characteristics
| NID Height | 550 ft |
| Dam Height | 550 ft |
| Dam Length | 5,375 ft |
| NID Storage | 9,715,346 acre-ft |
| Max Storage | 9,715,346 acre-ft |
| Surface Area | 82,300 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Not Available |
| EAP Status | — |
| Last Inspection | — |
| Inspection Frequency | 4 |
Dam Information
| Year Completed | 1941 |
| Primary Purpose | Flood Risk Reduction |
| Dam Type | — |
| Owner Type | — |
| Owner | BUREAU OF RECLAMATION |
About This Dam Record
Dam safety data is maintained by the Army Corps of Engineers National Inventory of Dams (NID). High-hazard dams are those where failure could cause loss of life or major property damage downstream.