SR 900 over I-90

Fair Condition56 years old40,805 vehicles/day

Location

StateWashington
CountyKing
Location9.6 E Jct I-405
CarriesSR 900
CrossesI-90
Coordinates47.54827, -122.06138

Condition Ratings

Overall ConditionFair
Deck5 (Fair)
Superstructure6 (Satisfactory)
Substructure7 (Good)
Scour CriticalNot applicable

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length241.1 ft (73.5 m)
Max Span128.0 ft (39 m)
Deck Width88.6 ft (27 m)
Deck Area1984.5 sq m
Main Spans2
Year Built1970 (reconstructed 2004)

Traffic

Avg Daily Traffic40,805 (2023)
Truck Traffic3%
Lanes On Bridge6
Lanes Under Bridge8

Inspection & Ownership

Last Inspection923
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure Number0008573H0000000

Nearby Bridges

NW Sammamish Road over Tributary 170 0.3 mi Good EB I-90 over Tibbetts Creek 0.4 mi Good WB I-90 over Tibbetts Creek 0.4 mi Good W Lk Sam PKWY SE over Tibbetts Creek 0.4 mi Good Newport Way SW over Tibbetts Creek 0.5 mi Good SR 900 over Tibbetts CR 0.6 mi Good Ballfield Road over Tibbets Creek 0.7 mi Fair N.w.sammamish Road over Issaquah Creek 0.7 mi Fair SE 62nd Street over Issaquah Creek 0.7 mi Good I-90 over Issaquah Creek 0.8 mi Good