SR 18 over M Street
Good Condition42 years old31,748 vehicles/day
Location
| State | Washington |
| County | King |
| Location | 0.6 E Jct SR 164 |
| Carries | SR 18 |
| Crosses | M Street |
| Coordinates | 47.30347, -122.21367 |
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 | 119.1 ft (36.3 m) |
| Max Span | 119.1 ft (36.3 m) |
| Deck Width | 85.0 ft (25.9 m) |
| Deck Area | 940.2 sq m |
| Main Spans | 1 |
| Year Built | 1984 |
Traffic
| Avg Daily Traffic | 31,748 (2023) |
| Truck Traffic | 11% |
| Lanes On Bridge | 4 |
| Lanes Under Bridge | 5 |
Inspection & Ownership
| Last Inspection | November 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 0012555A0000000 |