SR 509 over SR 509/des Moines Mem
Good Condition47 years old7,555 vehicles/day
Location
| State | Washington |
| County | King |
| Location | 4.7 N Jct SR 516 |
| Carries | SR 509 |
| Crosses | SR 509/des Moines Mem |
| Coordinates | 47.43881, -122.32233 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 85.0 ft (25.9 m) |
| Max Span | 80.7 ft (24.6 m) |
| Deck Width | 61.0 ft (18.6 m) |
| Deck Area | 481.7 sq m |
| Main Spans | 1 |
| Year Built | 1979 |
Traffic
| Avg Daily Traffic | 7,555 (2023) |
| Truck Traffic | 6% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 4 |
Inspection & Ownership
| Last Inspection | 923 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 0011405A0000000 |