Oso Loop RD over N.f. Stillaguamish River
Good Condition36 years old357 vehicles/day
Location
| State | Washington |
| County | Snohomish |
| Location | 0.3 S Jct SR 530 |
| Carries | Oso Loop RD |
| Crosses | N.f. Stillaguamish River |
| Coordinates | 48.26599, -121.92866 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 580.1 ft (176.8 m) |
| Max Span | 140.1 ft (42.7 m) |
| Deck Width | 30.8 ft (9.4 m) |
| Deck Area | 1661.9 sq m |
| Main Spans | 5 |
| Year Built | 1990 |
Traffic
| Avg Daily Traffic | 357 (2023) |
| Truck Traffic | 18% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 624 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Historical significance is not determined |
| Structure Number | 085766000000000 |