56th AVE So over Duwamish River
Fair Condition41 years old2,900 vehicles/day
Location
| State | Washington |
| County | King |
| Location | 0.1e Interurban AVE |
| Carries | 56th AVE So |
| Crosses | Duwamish River |
| Coordinates | 47.48250, -122.26744 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 4 — Foundations need monitoring |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Box Beam - Multiple |
| Total Length | 244.1 ft (74.4 m) |
| Max Span | 149.0 ft (45.4 m) |
| Deck Width | 34.8 ft (10.6 m) |
| Deck Area | 788.6 sq m |
| Main Spans | 2 |
| Year Built | 1985 |
Traffic
| Avg Daily Traffic | 2,900 (2023) |
| Truck Traffic | 30% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 423 |
| Inspection Frequency | Every 24 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Historical significance is not determined |
| Structure Number | 081662000000000 |