I-5 over Union Slough
Fair Condition58 years old64,989 vehicles/day
Location
| State | Washington |
| County | Snohomish |
| Location | 3.3 N Jct US 2 |
| Carries | I-5 |
| Crosses | Union Slough |
| Coordinates | 48.02314, -122.17553 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 396.0 ft (120.7 m) |
| Max Span | 85.0 ft (25.9 m) |
| Deck Width | 51.5 ft (15.7 m) |
| Deck Area | 1895.0 sq m |
| Main Spans | 4 |
| Year Built | 1968 |
Traffic
| Avg Daily Traffic | 64,989 (2023) |
| Truck Traffic | 6% |
| Lanes On Bridge | 3 |
Inspection & Ownership
| Last Inspection | 623 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Historical significance is not determined |
| Structure Number | 0008226B0000000 |