I-90 Ramp To I-405 over I-90 Mainline

Fair Condition57 years old21,663 vehicles/day

Location

StateWashington
CountyKing
LocationJct I-405
CarriesI-90 Ramp To I-405
CrossesI-90 Mainline
Coordinates47.57989, -122.17528

Condition Ratings

Overall ConditionFair
Deck6 (Satisfactory)
Superstructure7 (Good)
Substructure7 (Good)
Scour CriticalNot applicable

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length454.1 ft (138.4 m)
Max Span134.8 ft (41.1 m)
Deck Width36.4 ft (11.1 m)
Deck Area1536.2 sq m
Main Spans4
Year Built1969

Traffic

Avg Daily Traffic21,663 (2023)
Truck Traffic5%
Lanes On Bridge1
Lanes Under Bridge10

Inspection & Ownership

Last Inspection424
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure Number0008190B0000000

Nearby Bridges

I-405 NB Hov over I-90 Factoria 0.0 mi Fair I-405 over I-90 0.1 mi Good I-405 over I-90 Factoria 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 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-405 Ramp over EB I-90 Ramp 0.2 mi Good I-90 over Richards RD 0.3 mi Good I-90 over Richards RD 0.3 mi Fair