Us101 (hwy 9) over Half Viaduct
Fair Condition86 years old5,743 vehicles/day
Location
| State | Oregon |
| County | Tillamook |
| Location | 023 Mi N Manzanita |
| Carries | Us101 (hwy 9) |
| Crosses | Half Viaduct |
| Coordinates | 45.74187, -123.95450 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 8 (Very Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 6 (Satisfactory) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Tee Beam |
| Total Length | 375.0 ft (114.3 m) |
| Max Span | 15.1 ft (4.6 m) |
| Deck Width | 22.6 ft (6.9 m) |
| Deck Area | 788.7 sq m |
| Main Spans | 25 |
| Year Built | 1940 |
Traffic
| Avg Daily Traffic | 5,743 (2022) |
| Truck Traffic | 12% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | October 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is eligible for the National Register |
| Structure Number | 01951 009 04086 |