Analyzing deck conditions, superstructure ratings, and bad puns...
Analyzing deck conditions, superstructure ratings, and bad puns...
Crunching the numbers on America's infrastructure...
over LEWIS RIVER
19.7 N JCT SR 502
Parametric wireframe generated from real NBI dimensions. Drag to rotate, scroll to zoom.
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This bridge has a Poor overall condition rating of 3 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 1,239 vehicles per day and is 94 years old (reconstructed in 1957).
Its sufficiency rating of 42.9 places it below the national average of 63.6.
For travelers with bridge anxiety
This bridge may cause some awareness for travelers with bridge anxiety, but has manageable characteristics.
This bridge is 458 feet long — a short crossing, about 10-15 seconds.
A suspension bridge — an open design, typically high above the waterway.
No height data available — likely a standard overpass height.
About 1,239 vehicles cross daily — light traffic, a smooth crossing.
The deck is 20 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
1932
94 years old (rebuilt 1957)
Structure Type
Steel Suspension
Total Length
458 ft
139.6 m
Deck Width
20 ft
6.1 m
Spans
1
sections between supports
Max Span
300 ft
longest unsupported section (91.4 m)
Traffic Lanes
1 lane
Daily Traffic
1,239vehicles/day
45.96031°N, 122.37247°W
Steel Suspension
A suspension bridge hangs the deck from cables supported by tall towers. This design enables the longest bridge spans in the world.
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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.