SR 18 W-s Ramp over I-5 & SR 18

Fair Condition14 years old28,117 vehicles/day

Location

StateWashington
CountyKing
LocationJct I-5
CarriesSR 18 W-s Ramp
CrossesI-5 & SR 18
Coordinates47.28983, -122.30336

Condition Ratings

Overall ConditionFair
Deck6 (Satisfactory)
Superstructure6 (Satisfactory)
Substructure8 (Very Good)
Scour CriticalNot applicable

Physical Characteristics

MaterialSteel Continuous
DesignBox Beam - Single/Spread
Total Length2407.2 ft (733.7 m)
Max Span250.0 ft (76.2 m)
Deck Width42.7 ft (13 m)
Deck Area9538.1 sq m
Main Spans5
Year Built2012

Traffic

Avg Daily Traffic28,117 (2023)
Truck Traffic12%
Lanes On Bridge2
Lanes Under Bridge16

Inspection & Ownership

Last Inspection724
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Structure Number0017936B0000000

Nearby Bridges

I-5 over SR 18 0.1 mi Fair I-5 over SR 18 0.2 mi Fair SR 18 E-n Ramp over I-5 SR 18 Ramps 0.3 mi Fair Weyerhaeuser Way S over SR 18 0.6 mi Fair I-5 over S 336th ST 0.7 mi Fair I-5 over S 336th ST 0.7 mi Fair SR 161 over I-5 0.8 mi Fair Military RD over SR 18 1.6 mi Good SR 18 over Peasley Canyon RD 1.7 mi Fair Sr99 over W. Fk. Hylebos Creek 1.7 mi Good