I-405 over May Creek

Good Condition68 years old74,980 vehicles/day

Location

StateWashington
CountyKing
Location1.8 N Jct SR 900
CarriesI-405
CrossesMay Creek
Coordinates47.52797, -122.19776

Condition Ratings

Overall ConditionGood
Deck7 (Good)
Superstructure7 (Good)
Substructure7 (Good)
Channel/Waterway8 (Very Good)
Scour Critical5 — Stable for scour

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length169.0 ft (51.5 m)
Max Span65.9 ft (20.1 m)
Deck Width79.4 ft (24.2 m)
Deck Area1246.3 sq m
Main Spans3
Year Built1958 (reconstructed 1986)

Traffic

Avg Daily Traffic74,980 (2023)
Truck Traffic6%
Lanes On Bridge4

Inspection & Ownership

Last Inspection623
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure Number0005347C0000000

Nearby Bridges