I-405 over Northup Way

Good Condition61 years old67,108 vehicles/day

Location

StateWashington
CountyKing
Location0.1 N Jct SR 520
CarriesI-405
CrossesNorthup Way
Coordinates47.63328, -122.18739

Condition Ratings

Overall ConditionGood
Deck7 (Good)
Superstructure7 (Good)
Substructure7 (Good)
Scour CriticalNot applicable

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignStringer/Multi-beam
Total Length160.1 ft (48.8 m)
Max Span58.1 ft (17.7 m)
Deck Width78.1 ft (23.8 m)
Deck Area1161.4 sq m
Main Spans3
Year Built1965 (reconstructed 1993)

Traffic

Avg Daily Traffic67,108 (2023)
Truck Traffic6%
Lanes On Bridge5
Lanes Under Bridge2

Inspection & Ownership

Last Inspection424
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure Number0007596E0000000

Nearby Bridges

SR 520 E-n Ramp over Northup Way 0.0 mi Good SR 520 W-n Ramp over Northup Way 0.0 mi Fair I-405 over Northup Way 0.0 mi Good S-e Ramp I-405 over SR 520 0.1 mi Good SR 520 E-n Ramp over 115th AVE NE & Trail 0.1 mi Fair I-405 S-w Ramp over Northup Way 0.1 mi Good I-405 over 115th AVE NE & Trail 0.1 mi Good I-405 over SR 520 0.1 mi Good I-405 over SR 520 0.1 mi Good SR 520 over 116th AVE NE 0.1 mi Fair