SR 520 over Northup Way

Good Condition55 years old45,466 vehicles/day

Location

StateWashington
CountyKing
Location0.3 E Jct I-405
CarriesSR 520
CrossesNorthup Way
Coordinates47.63214, -122.18181

Condition Ratings

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

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length376.0 ft (114.6 m)
Max Span143.0 ft (43.6 m)
Deck Width68.6 ft (20.9 m)
Deck Area2395.1 sq m
Main Spans3
Year Built1971 (reconstructed 1998)

Traffic

Avg Daily Traffic45,466 (2023)
Truck Traffic3%
Lanes On Bridge4
Lanes Under Bridge3

Inspection & Ownership

Last Inspection624
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure Number0009086A0000000

Nearby Bridges

SR 520 over 120th AVE NE 0.0 mi Fair I-405 N-e Ramp over Northup Way 0.0 mi Good SR 520 over Peat Bog 0.1 mi Fair SR 520 over Pedestrian Trail 0.1 mi Fair N-e Ramp over Trail 0.1 mi Good SR 520 over Pedestrian Trail 0.1 mi Good Northup Way over Eastside Rail Corridor 0.2 mi Fair SR 520 over 116th AVE NE 0.2 mi Fair 405 N-e Ramp over 116th AVE NE 0.2 mi Good SR 520 over 116th AVE NE 0.2 mi Fair