I-90 over Mercer Sl
Poor Condition56 years old74,410 vehicles/day
Location
| State | Washington |
| County | King |
| Location | 6.6 E Jct I-5 |
| Carries | I-90 |
| Crosses | Mercer Sl |
| Coordinates | 47.57905, -122.18977 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 6 (Satisfactory) |
| Superstructure | 3 (Serious) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Box Beam - Multiple |
| Total Length | 2669.0 ft (813.5 m) |
| Max Span | 100.1 ft (30.5 m) |
| Deck Width | 75.5 ft (23 m) |
| Deck Area | 18710.5 sq m |
| Main Spans | 4 |
| Year Built | 1970 (reconstructed 1993) |
Traffic
| Avg Daily Traffic | 74,410 (2023) |
| Truck Traffic | 3% |
| Lanes On Bridge | 5 |
| Lanes Under Bridge | 3 |
Inspection & Ownership
| Last Inspection | 223 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 0008610A0000000 |