Crunching the numbers on America's infrastructure...
Crunching the numbers on America's infrastructure...
Analyzing deck conditions, superstructure ratings, and bad puns...
over PORTAGE CREEK
1.9 N JCT SR 531
Parametric wireframe generated from real NBI dimensions. Drag to rotate, scroll to zoom.
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This bridge has a Fair overall condition rating of 6 out of 9. While it is not classified as structurally deficient, it shows some deterioration that is being monitored.
The bridge carries 47,995 vehicles per day and is 69 years old (reconstructed in 1969).
Its sufficiency rating of 67.8 is above 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 121 feet long — a quick crossing, under 5 seconds at highway speed.
A standard overpass design with solid barriers on each side.
No height data available — likely a standard overpass height.
About 47,995 vehicles cross daily — moderate traffic, some congestion possible.
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
1957
69 years old (rebuilt 1969)
Structure Type
Concrete (Continuous) Slab
Total Length
121 ft
36.9 m
Deck Width
55 ft
16.9 m
Spans
5
sections between supports
Max Span
30 ft
longest unsupported section (9.1 m)
Traffic Lanes
3 lanes
One-way traffic
Daily Traffic
47,995vehicles/day
48.17927°N, 122.19534°W
Concrete (Continuous) Slab
A concrete slab bridge is a simple, solid concrete deck that acts as both the structural support and driving surface. Common for short spans, they are durable and low-maintenance.
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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.