Or 99w(hwy 91)nb over Harbor Drive Viaduct
Fair Condition77 years old11,470 vehicles/day
Location
| State | Oregon |
| County | Multnomah |
| Location | Near W End Ross Isl. Br. |
| Carries | Or 99w(hwy 91)nb |
| Crosses | Harbor Drive Viaduct |
| Coordinates | 45.49554, -122.67778 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Tee Beam |
| Total Length | 514.1 ft (156.7 m) |
| Max Span | 42.0 ft (12.8 m) |
| Deck Width | 33.8 ft (10.3 m) |
| Deck Area | 1614.0 sq m |
| Main Spans | 13 |
| Year Built | 1949 |
Traffic
| Avg Daily Traffic | 11,470 (2022) |
| Truck Traffic | 1% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 224 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 05195A01W 00193 |