Seattle BLVD over Sound Transit Tunnel
Fair Condition116 years old22,000 vehicles/day
Location
| State | Washington |
| County | King |
| Location | Seattle BLVD Eo 4th AVE S |
| Carries | Seattle BLVD |
| Crosses | Sound Transit Tunnel |
| Coordinates | 47.59611, -122.32833 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel |
| Design | Girder and Floorbeam |
| Total Length | 287.1 ft (87.5 m) |
| Max Span | 75.1 ft (22.9 m) |
| Deck Width | 101.0 ft (30.8 m) |
| Deck Area | 2,695 sq m |
| Main Spans | 3 |
| Year Built | 1910 (reconstructed 1981) |
Traffic
| Avg Daily Traffic | 22,000 (2019) |
| Truck Traffic | 5% |
| Lanes On Bridge | 6 |
Inspection & Ownership
| Last Inspection | 823 |
| Inspection Frequency | Every 24 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 085041000000000 |