Blackburn ST over I-5
Fair Condition72 years old4,314 vehicles/day
Location
| State | Washington |
| County | Skagit |
| Location | 4.7 N Jct SR 534 |
| Carries | Blackburn ST |
| Crosses | I-5 |
| Coordinates | 48.40658, -122.33133 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 8 (Very Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Tee Beam |
| Total Length | 193.9 ft (59.1 m) |
| Max Span | 45.9 ft (14 m) |
| Deck Width | 33.8 ft (10.3 m) |
| Deck Area | 608.7 sq m |
| Main Spans | 5 |
| Year Built | 1954 |
Traffic
| Avg Daily Traffic | 4,314 (2002) |
| Truck Traffic | 1% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 4 |
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 | 0004535A0000000 |