SR 99 over Mercer ST
Good Condition11 years old12,045 vehicles/day
Location
| State | Washington |
| County | King |
| Location | 5.7 N Jct SR 509 |
| Carries | SR 99 |
| Crosses | Mercer ST |
| Coordinates | 47.62443, -122.34377 |
Condition Ratings
| Overall Condition | Good |
| Deck | 8 (Very Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 8 (Very Good) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 128.9 ft (39.3 m) |
| Max Span | 124.0 ft (37.8 m) |
| Deck Width | 117.5 ft (35.8 m) |
| Deck Area | 1406.9 sq m |
| Main Spans | 1 |
| Year Built | 2015 |
Traffic
| Avg Daily Traffic | 12,045 (2023) |
| Truck Traffic | 4% |
| Lanes On Bridge | 7 |
| Lanes Under Bridge | 7 |
Inspection & Ownership
| Last Inspection | 823 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Historical significance is not determined |
| Structure Number | 0018549C0000000 |