I-405 over 9th AVE SE
Good Condition58 years old46,512 vehicles/day
Location
| State | Washington |
| County | Snohomish |
| Location | 0.4 N Jct SR 527 |
| Carries | I-405 |
| Crosses | 9th AVE SE |
| Coordinates | 47.79786, -122.22044 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Prestressed Concrete Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 180.1 ft (54.9 m) |
| Max Span | 67.9 ft (20.7 m) |
| Deck Width | 57.4 ft (17.5 m) |
| Deck Area | 960.8 sq m |
| Main Spans | 3 |
| Year Built | 1968 (reconstructed 2001) |
Traffic
| Avg Daily Traffic | 46,512 (2023) |
| Truck Traffic | 5% |
| Lanes On Bridge | 3 |
| Lanes Under Bridge | 2 |
Inspection & Ownership
| Last Inspection | October 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 0008417A0000000 |