Fun fact: Covered bridges were roofed to protect the wood, not the travelers.
Fun fact: Covered bridges were roofed to protect the wood, not the travelers.
Bridges: the original social network. Connecting communities since 850 BC.
over LAKE WASHINGTON
3.8 E JCT I-5
Parametric wireframe generated from real NBI dimensions. Drag to rotate, scroll to zoom.
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This bridge has a Good overall condition rating of 7 out of 9. It is in good structural condition and is not classified as structurally deficient.
The bridge carries 68,544 vehicles per day and is 86 years old (reconstructed in 1992).
Its sufficiency rating of 61.0 places it below the national average of 63.6.
The NBI records a navigation clearance of 29 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 890 feet long — a moderate crossing, about 30 seconds.
An arch bridge design with some openness to the surroundings.
About 29 feet above ground — moderate height, similar to a 3-5 story building.
About 68,544 vehicles cross daily — heavy traffic, congestion likely during rush hours.
The deck is 55 feet wide with 3-4 lanes — standard width.
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
1940
86 years old (rebuilt 1992)
Structure Type
Steel Arch (Thru)
Total Length
890 ft
271.3 m
Deck Width
55 ft
16.8 m
Spans
1
sections between supports
Max Span
227 ft
longest unsupported section (69.2 m)
Traffic Lanes
4 lanes
One-way traffic
Clearance Below
29 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
68,544vehicles/day
47.58926°N, 122.25577°W
Steel Arch (Thru)
A steel arch bridge uses a curved steel structure to carry loads primarily through compression. These bridges are known for their elegant appearance and structural efficiency.
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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.