NE 21st AVE over B-8 Over Columbia Slough
Fair Condition52 years old1,416 vehicles/day
Location
| State | Oregon |
| County | Multnomah |
| Location | 21st-n Of Columbia BLVD |
| Carries | NE 21st AVE |
| Crosses | B-8 Over Columbia Slough |
| Coordinates | 45.58119, -122.64387 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 8 (Very Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 4 — Foundations need monitoring |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Slab |
| Total Length | 128.9 ft (39.3 m) |
| Max Span | 42.0 ft (12.8 m) |
| Deck Width | 56.1 ft (17.1 m) |
| Deck Area | 672.0 sq m |
| Main Spans | 3 |
| Year Built | 1974 |
Traffic
| Avg Daily Traffic | 1,416 (2020) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 724 |
| Inspection Frequency | Every 24 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 25B08 000 |