SR 520 over Wls PKWY & Sammamish R
Fair Condition50 years old42,985 vehicles/day
Location
| State | Washington |
| County | King |
| Location | 4.9 E Jct I-405 |
| Carries | SR 520 |
| Crosses | Wls PKWY & Sammamish R |
| Coordinates | 47.66708, -122.12733 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Box Beam - Multiple |
| Total Length | 387.1 ft (118 m) |
| Max Span | 127.0 ft (38.7 m) |
| Deck Width | 59.1 ft (18 m) |
| Deck Area | 2,124 sq m |
| Main Spans | 4 |
| Year Built | 1976 (reconstructed 2010) |
Traffic
| Avg Daily Traffic | 42,985 (2023) |
| Truck Traffic | 3% |
| Lanes On Bridge | 3 |
| Lanes Under Bridge | 4 |
Inspection & Ownership
| Last Inspection | 824 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 0010201A0000000 |