I-90 over SR 18

Fair Condition51 years old22,901 vehicles/day

Location

StateWashington
CountyKing
Location9.7 E Jct SR 900
CarriesI-90
CrossesSR 18
Coordinates47.50822, -121.88414

Condition Ratings

Overall ConditionFair
Deck6 (Satisfactory)
Superstructure6 (Satisfactory)
Substructure7 (Good)
Scour CriticalNot applicable

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignStringer/Multi-beam
Total Length208.0 ft (63.4 m)
Max Span109.9 ft (33.5 m)
Deck Width70.9 ft (21.6 m)
Deck Area1369.4 sq m
Main Spans3
Year Built1975

Traffic

Avg Daily Traffic22,901 (2023)
Truck Traffic7%
Lanes On Bridge4
Lanes Under Bridge4

Inspection & Ownership

Last Inspection623
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure Number0009732A0000000

Nearby Bridges

I-90 over SR 18 0.1 mi Fair SR 18 over Lake Creek 0.3 mi Good Upper Preston RD over Lake Creek 1.0 mi Fair I-90 over Game Crossing 1.3 mi Fair I-90 over Game Crossing 1.3 mi Poor SR 18 over Raging River 1.6 mi Good I-90 over W Snoqualmie Ic 1.7 mi Good I-90 over W Snoqualmie Ic 1.7 mi Fair I-90 over Raging River 2.0 mi Poor I-90 over Raging River 2.1 mi Good