I-405 N-w Ramp over Sammamish R I-405 SR 5
Fair Condition58 years old8,770 vehicles/day
Location
| State | Washington |
| County | King |
| Location | 8.7 N Jct SR 520 |
| Carries | I-405 N-w Ramp |
| Crosses | Sammamish R I-405 SR 5 |
| Coordinates | 47.75597, -122.18503 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Box Beam - Multiple |
| Total Length | 1469.2 ft (447.8 m) |
| Max Span | 108.9 ft (33.2 m) |
| Deck Width | 27.6 ft (8.4 m) |
| Deck Area | 3761.5 sq m |
| Main Spans | 15 |
| Year Built | 1968 |
Traffic
| Avg Daily Traffic | 8,770 (2023) |
| Truck Traffic | 5% |
| Lanes On Bridge | 1 |
| Lanes Under Bridge | 14 |
Inspection & Ownership
| Last Inspection | November 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 0008382D0000000 |