Marshland Dist 504 over Westport Slough
Good Condition31 years old608 vehicles/day
Location
| State | Oregon |
| County | Columbia |
| Location | 040 Mi W Clatskanie |
| Carries | Marshland Dist 504 |
| Crosses | Westport Slough |
| Coordinates | 46.11952, -123.28098 |
Condition Ratings
| Overall Condition | Good |
| Deck | 8 (Very Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 8 (Very Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Slab |
| Total Length | 191.9 ft (58.5 m) |
| Max Span | 64.0 ft (19.5 m) |
| Deck Width | 24.0 ft (7.3 m) |
| Deck Area | 427.1 sq m |
| Main Spans | 3 |
| Year Built | 1995 |
Traffic
| Avg Daily Traffic | 608 (2020) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 523 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 17475 412700002 |