I-405 over Northup Way

Good Condition72 years old67,108 vehicles/day

Location

StateWashington
CountyKing
Location0.1 N Jct SR 520
CarriesI-405
CrossesNorthup Way
Coordinates47.63365, -122.18770

Condition Ratings

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

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length149.0 ft (45.4 m)
Max Span58.1 ft (17.7 m)
Deck Width70.9 ft (21.6 m)
Deck Area980.6 sq m
Main Spans3
Year Built1954 (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 Number0004609A0000000

Nearby Bridges

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