I-405 over I-90

Good Condition18 years old48,783 vehicles/day

Location

StateWashington
CountyKing
Location5.7 N Jct SR 900
CarriesI-405
CrossesI-90
Coordinates47.57914, -122.17469

Condition Ratings

Overall ConditionGood
Deck8 (Very Good)
Superstructure8 (Very Good)
Substructure8 (Very Good)
Scour CriticalNot applicable

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignStringer/Multi-beam
Total Length893.0 ft (272.2 m)
Max Span161.1 ft (49.1 m)
Deck Width59.1 ft (18 m)
Deck Area4899.6 sq m
Main Spans6
Year Built2008

Traffic

Avg Daily Traffic48,783 (2023)
Truck Traffic6%
Lanes On Bridge3
Lanes Under Bridge15

Inspection & Ownership

Last Inspection223
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Structure Number0017283A0000000

Nearby Bridges

I-405 over I-90 Factoria 0.0 mi Fair I-405 NB Hov over I-90 Factoria 0.0 mi Fair I-90 Ramp To I-405 over I-90 Mainline 0.1 mi Fair I-90 W-s Ramp over I-90 Mainline 0.1 mi Fair 405 NE Ramp over NE Ramp Over Ped Path 0.2 mi Good I-405 Ramp over EB I-90 Ramp 0.2 mi Good W-n Ramp To I-405 over S-w Ramp To I-90 0.2 mi Fair I-90 Ramp over Mercer Slough I-90 0.2 mi Good I-90 over Richards RD 0.3 mi Good I-90 over Richards RD 0.3 mi Fair