SR 509 over S 128th ST
Fair Condition58 years old21,456 vehicles/day
Location
| State | Washington |
| County | King |
| Location | 1.3 N Jct SR 518 |
| Carries | SR 509 |
| Crosses | S 128th ST |
| Coordinates | 47.48836, -122.32614 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Prestressed Concrete Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 203.1 ft (61.9 m) |
| Max Span | 107.9 ft (32.9 m) |
| Deck Width | 85.0 ft (25.9 m) |
| Deck Area | 1603.2 sq m |
| Main Spans | 3 |
| Year Built | 1968 |
Traffic
| Avg Daily Traffic | 21,456 (2023) |
| Truck Traffic | 3% |
| Lanes On Bridge | 4 |
| Lanes Under Bridge | 6 |
Inspection & Ownership
| Last Inspection | 523 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Historical significance is not determined |
| Structure Number | 0008276C0000000 |