I-90 over SR 18

Fair Condition63 years old22,901 vehicles/day

Location

StateWashington
CountyKing
Location9.7 E Jct SR 900
CarriesI-90
CrossesSR 18
Coordinates47.50900, -121.88392

Condition Ratings

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

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length158.1 ft (48.2 m)
Max Span71.9 ft (21.9 m)
Deck Width75.5 ft (23 m)
Deck Area1108.6 sq m
Main Spans3
Year Built1963 (reconstructed 1978)

Traffic

Avg Daily Traffic22,901 (2023)
Truck Traffic7%
Lanes On Bridge3
Lanes Under Bridge5

Inspection & Ownership

Last Inspection623
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure Number0006966B0000000

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 1.6 mi Good I-90 over W Snoqualmie Ic 1.6 mi Fair I-90 over Raging River 2.0 mi Poor I-90 over Raging River 2.0 mi Good