I-90 Ramp over Mercer Slough I-90

Good Condition31 years old2,421 vehicles/day

Location

StateWashington
CountyKing
Location6.4 E Jct I-5
CarriesI-90 Ramp
CrossesMercer Slough I-90
Coordinates47.58075, -122.17883

Condition Ratings

Overall ConditionGood
Deck7 (Good)
Superstructure7 (Good)
Substructure7 (Good)
Channel/Waterway8 (Very Good)
Scour Critical8 — Stable, low risk

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length2996.1 ft (913.2 m)
Max Span256.9 ft (78.3 m)
Deck Width28.9 ft (8.8 m)
Deck Area8036.2 sq m
Main Spans13
Year Built1995

Traffic

Avg Daily Traffic2,421 (2010)
Truck Traffic5%
Lanes On Bridge1
Lanes Under Bridge9

Inspection & Ownership

Last Inspection623
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Structure Number0014177A0000000

Nearby Bridges

I-90 Ramp To I-405 over I-90 Mainline 0.2 mi Fair I-405 NB Hov over I-90 Factoria 0.2 mi Fair I-90 W-n Ramp over I-90 Wbcd 0.2 mi Fair I-405 over I-90 0.2 mi Good I-405 over I-90 Factoria 0.2 mi Fair I-90 W-s Ramp over I-90 Mainline 0.3 mi Fair W-n Ramp To I-405 over S-w Ramp To I-90 0.3 mi Fair 405 NE Ramp over NE Ramp Over Ped Path 0.3 mi Good I-90 over Mercer Slough 0.4 mi Fair I-90 over Mercer Slough 0.4 mi Fair