SR 520 over PKWY & Sammamish River
Good Condition31 years old42,985 vehicles/day
Location
| State | Washington |
| County | King |
| Location | 4.9 E Jct I-405 |
| Carries | SR 520 |
| Crosses | PKWY & Sammamish River |
| Coordinates | 47.66719, -122.12738 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete Continuous |
| Design | Box Beam - Multiple |
| Total Length | 391.4 ft (119.3 m) |
| Max Span | 123.7 ft (37.7 m) |
| Deck Width | 58.1 ft (17.7 m) |
| Deck Area | 2111.6 sq m |
| Main Spans | 4 |
| Year Built | 1995 |
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 | Historical significance is not determined |
| Structure Number | 0014444A0000000 |