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.
Analyzing deck conditions, superstructure ratings, and bad puns...
over JOHNSON CREEK
.5 MI SE MT CARROLL
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 25 vehicles per day and is 37 years old.
Its sufficiency rating of 62.3 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 27 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.
Only about 25 vehicles cross daily — very light traffic with low congestion risk.
The deck is 24 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
1989
37 years old
Structure Type
Prestressed Concrete Box Beam (Multiple)
Total Length
27 ft
8.1 m
Deck Width
24 ft
7.3 m
Spans
1
sections between supports
Max Span
25 ft
longest unsupported section (7.6 m)
Traffic Lanes
2 lanes
Two-way traffic
Daily Traffic
25vehicles/day
42.07607°N, 89.95820°W
Prestressed Concrete Box Beam (Multiple)
A prestressed concrete box beam bridge combines hollow box sections with prestressing technology, enabling longer spans with reduced weight and material usage.
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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.