Did you know? The oldest bridge in the NBI was built in 1697.
Did you know? The oldest bridge in the NBI was built in 1697.
If I had a dime for every bridge I've crossed, I'd have about ten bucks by now.
over SNOHOMISH RIVER
4.6 N JCT SR 529 SPUR
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This bridge has a Poor overall condition rating of 4 out of 9. This bridge is classified as being in poor condition, meaning one or more structural components have significant deterioration. Poor condition does not mean the bridge is unsafe to drive on, but it does mean repairs or replacement may be needed.
The bridge carries 16,286 vehicles per day and is 99 years old (reconstructed in 1994).
Its sufficiency rating of 49.6 places it below the national average of 63.6.
The NBI records a navigation clearance of 75 feet — the minimum vertical space below the bridge deck. The total height of the bridge structure (including towers, railings, and superstructure) may be higher.
For travelers with bridge anxiety
This bridge has some features that may be challenging for travelers with bridge anxiety. See the tips below for a more comfortable crossing.
This bridge is 2680 feet long — a longer crossing, over 1 minute.
A movable bridge — it may occasionally stop for boat traffic.
About 75 feet above ground — an elevated crossing, similar to a 5-10 story building.
About 16,286 vehicles cross daily — moderate traffic, some congestion possible.
The deck is 25 feet wide with 1-2 lanes — a narrower crossing.
This bridge crosses over water. Focus on the road ahead — the water is far below.
This comfort score is designed to help individuals with bridge anxiety plan their travel. All bridges in the National Bridge Inventory are regularly inspected and deemed safe for travel. This is not medical advice — if you experience severe anxiety, please consult a healthcare professional.
Year Built
1927
99 years old (rebuilt 1994)
Structure Type
Steel Movable (Lift)
Total Length
2,680 ft
816.9 m
Deck Width
25 ft
7.6 m
Spans
1
sections between supports
Max Span
180 ft
longest unsupported section (54.9 m)
Traffic Lanes
2 lanes
One-way traffic
Clearance Below
75 ft
navigation clearance under deck
Clearance height compared to familiar objects
Height shown is the navigation clearance below the bridge deck. The total height of the bridge structure (including towers and superstructure) may be higher.
Daily Traffic
16,286vehicles/day
48.01215°N, 122.18942°W
Steel Movable (Lift)
A movable bridge can change position to allow passage of boats or other traffic. Steel movable bridges include lift, bascule (drawbridge), and swing types.
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Data from the National Bridge Inventory (NBI), maintained by the Federal Highway Administration (FHWA).
Data year: 2025. Conditions may have changed since the last inspection.
This information is provided for educational and informational purposes only. It should not be used as the sole basis for any decisions related to bridge safety or transportation planning. Always consult official sources and local authorities for the most current data.