SR 520 Ramp over Portage Bay
Fair Condition63 years old11,169 vehicles/day
Location
| State | Washington |
| County | King |
| Location | 0.8 E Jct I-5 |
| Carries | SR 520 Ramp |
| Crosses | Portage Bay |
| Coordinates | 47.64356, -122.30466 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 375.0 ft (114.3 m) |
| Max Span | 75.1 ft (22.9 m) |
| Deck Width | 22.6 ft (6.9 m) |
| Deck Area | 788.7 sq m |
| Main Spans | 5 |
| Year Built | 1963 |
Traffic
| Avg Daily Traffic | 11,169 (2022) |
| Truck Traffic | 5% |
| Lanes On Bridge | 1 |
Inspection & Ownership
| Last Inspection | 324 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 0006819B0000000 |