McNary Lock and Dam
Oregon — Benton County — COLUMBIA RIVER
Location
| State | Oregon |
| County | Benton |
| River | COLUMBIA RIVER |
| Coordinates | 45.93604, -119.29777 |
Physical Characteristics
| NID Height | 220 ft |
| Dam Height | — |
| Dam Length | 7,365 ft |
| NID Storage | 1,350,000 acre-ft |
| Max Storage | 0 acre-ft |
| Surface Area | 38,800 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Not Available |
| EAP Status | Yes |
| Last Inspection | August 11, 2025 |
| Inspection Frequency | 5 |
Dam Information
| Year Completed | 1954 |
| Primary Purpose | Navigation |
| Dam Type | Concrete |
| Owner Type | Federal |
| Owner | USACE - Walla Walla District |
| Other Name | Lake Wallula |
Location Map
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.