Structure KN0000000 · King County, WA
Carries I-90 over Lake Washington, 1.9 E Jct I-5.
6,561 ft end to end: about 18 football fields, or 1.2 miles. Lengths are drawn to scale; at this length a semi-truck would be a speck. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a bridge of this kind.
| State | Washington |
| County | King |
| Location | 1.9 E Jct I-5 |
| Carries | I-90 |
| Crosses | Lake Washington |
| Coordinates | 47.59000, -122.28333 |
| Material | Concrete |
| Design | Other |
| Total Length | 6561.0 ft (1999.8 m) |
| Max Span | 6561.0 ft (1999.8 m) |
| Deck Width | 60.0 ft (18.3 m) |
| Deck Area | 36596.3 sq m |
| Main Spans | 1 |
| Year Built | 1940 (reconstructed 1992) |
| Avg Daily Traffic | 68,544 (2023) |
| Truck Traffic | 3% |
| Lanes On Bridge | 4 |
| Last Inspection | May 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 000000KN0000000 |
Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."
A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.