HWY 100 over Viaduct
Poor Condition112 years old901 vehicles/day
Location
| State | Oregon |
| County | Multnomah |
| Location | 0.2 Mi W Multnomah Falls |
| Carries | HWY 100 |
| Crosses | Viaduct |
| Coordinates | 45.57710, -122.12100 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 6 (Satisfactory) |
| Superstructure | 4 (Poor) |
| Substructure | 6 (Satisfactory) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Slab |
| Total Length | 401.9 ft (122.5 m) |
| Max Span | 20.0 ft (6.1 m) |
| Deck Width | 20.0 ft (6.1 m) |
| Deck Area | 747.2 sq m |
| Main Spans | 20 |
| Year Built | 1914 |
Traffic
| Avg Daily Traffic | 901 (2022) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 924 |
| Inspection Frequency | Every 12 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is on the National Register of Historic Places |
| Structure Number | 00840 125 01950 |