SR 509 over Thames Creek/ped Trail
Fair Condition97 years old3,869 vehicles/day
Location
| State | Washington |
| County | King |
| Location | 11.0 N Jct I-705 |
| Carries | SR 509 |
| Crosses | Thames Creek/ped Trail |
| Coordinates | 47.31797, -122.41444 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 5 (Fair) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 9 — Foundation above flood level |
Physical Characteristics
| Material | Steel |
| Design | Girder and Floorbeam |
| Total Length | 557.1 ft (169.8 m) |
| Max Span | 71.9 ft (21.9 m) |
| Deck Width | 35.1 ft (10.7 m) |
| Deck Area | 1816.9 sq m |
| Main Spans | 11 |
| Year Built | 1929 (reconstructed 1996) |
Traffic
| Avg Daily Traffic | 3,869 (2023) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 724 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000HX0000000 |