Pioneer Highway over Thomsen Slough
Fair Condition107 years old4,051 vehicles/day
Location
| State | Washington |
| County | Snohomish |
| Location | 8.0 E Jct SR 532 |
| Carries | Pioneer Highway |
| Crosses | Thomsen Slough |
| Coordinates | 48.19093, -122.23117 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 8 (Very Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete |
| Design | Arch - Deck |
| Total Length | 40.0 ft (12.2 m) |
| Max Span | 40.0 ft (12.2 m) |
| Deck Width | 30.8 ft (9.4 m) |
| Deck Area | 114.7 sq m |
| Main Spans | 1 |
| Year Built | 1919 (reconstructed 2003) |
Traffic
| Avg Daily Traffic | 4,051 (2022) |
| Truck Traffic | 14% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 724 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 0000364B0000000 |