I-90 over 4th AVE NW & Trail

Fair Condition55 years old32,550 vehicles/day

Location

StateWashington
CountyKing
Location1.0 E Jct SR 900
CarriesI-90
Crosses4th AVE NW & Trail
Coordinates47.54264, -122.04072

Condition Ratings

Overall ConditionFair
Deck7 (Good)
Superstructure6 (Satisfactory)
Substructure6 (Satisfactory)
Scour CriticalNot applicable

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignStringer/Multi-beam
Total Length444.9 ft (135.6 m)
Max Span109.9 ft (33.5 m)
Deck Width75.1 ft (22.9 m)
Deck Area3105.2 sq m
Main Spans5
Year Built1971

Traffic

Avg Daily Traffic32,550 (2023)
Truck Traffic7%
Lanes On Bridge4
Lanes Under Bridge3

Inspection & Ownership

Last Inspection823
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure Number0008573C0000000

Nearby Bridges

I-90 over 4th AVE NW & Trail 0.0 mi Fair I-90 WB On Ramp over 224th AVE NW & Trail 0.0 mi Fair N.w.gilman Blvd. over Issaquah Ck. 0.2 mi Fair E Lake Sammamish over N Fork Issaquah Creek 0.2 mi Good I-90 over Issaquah Creek 0.2 mi Good 4th AVE NW over North Fork Issaquah CR 0.2 mi Good I-90 over Issaquah Creek 0.2 mi Good I-90 over Front Street 0.2 mi Good I-90 over Front ST N 0.3 mi Fair N.w. Juniper St. over Issaquah Creek 0.3 mi Good