SR 520 W-n Ramp over Northup Way
Fair Condition33 years old12,471 vehicles/day
Location
| State | Washington |
| County | King |
| Location | Jct I-405 |
| Carries | SR 520 W-n Ramp |
| Crosses | Northup Way |
| Coordinates | 47.63317, -122.18697 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Prestressed Concrete Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 162.1 ft (49.4 m) |
| Max Span | 64.0 ft (19.5 m) |
| Deck Width | 35.1 ft (10.7 m) |
| Deck Area | 528.6 sq m |
| Main Spans | 3 |
| Year Built | 1993 |
Traffic
| Avg Daily Traffic | 12,471 (2023) |
| Truck Traffic | 5% |
| Lanes On Bridge | 1 |
| Lanes Under Bridge | 2 |
Inspection & Ownership
| Last Inspection | October 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 0014039F0000000 |