I-5 over Stillaguamish River

Fair Condition93 years old45,626 vehicles/day

Location

StateWashington
CountySnohomish
Location0.7 N Jct SR 530
CarriesI-5
CrossesStillaguamish River
Coordinates48.19740, -122.21048

Condition Ratings

Overall ConditionFair
Deck7 (Good)
Superstructure6 (Satisfactory)
Substructure6 (Satisfactory)
Channel/Waterway6 (Satisfactory)
Scour Critical3 — Scour critical

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length858.9 ft (261.8 m)
Max Span200.1 ft (61 m)
Deck Width49.2 ft (15 m)
Deck Area3,927 sq m
Main Spans3
Year Built1933

Traffic

Avg Daily Traffic45,626 (2023)
Truck Traffic8%
Lanes On Bridge3
Lanes Under Bridge2

Inspection & Ownership

Last Inspection324
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure Number0001652A0000000

Nearby Bridges

I-5 over Stillaguamish R 0.1 mi Fair SR 530 over I-5 0.7 mi Good 236th ST NE over I-5 0.9 mi Fair 236th ST NE over Unnamed Stream 1.0 mi Good Pioneer Highway over Thomsen Slough 1.1 mi Fair 236 ST NE over Pilchuck Creek 1.1 mi Fair Hevly RD over Stillaguamish Slough 1.1 mi Fair Old 99 over Pilchuck Creek 1.2 mi Poor I-5 over Pilchuck Creek 1.2 mi Good I-5 over Pilchuck Creek 1.2 mi Good