I-405 S-w Ramp over Northup Way

Good Condition60 years old9,907 vehicles/day

Location

StateWashington
CountyKing
Location0.1 N Jct SR 520
CarriesI-405 S-w Ramp
CrossesNorthup Way
Coordinates47.63410, -122.18821

Condition Ratings

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

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length136.2 ft (41.5 m)
Max Span54.1 ft (16.5 m)
Deck Width26.6 ft (8.1 m)
Deck Area336.1 sq m
Main Spans3
Year Built1966

Traffic

Avg Daily Traffic9,907 (2023)
Truck Traffic5%
Lanes On Bridge1
Lanes Under Bridge2

Inspection & Ownership

Last Inspection721
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure Number0007596G0000000

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