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.
The average US bridge is 48 years old. That's a lot of birthday candles.
over LITTLE MANISTEE RIVER
4 MI SW OF IRONS
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 8 out of 9. It is in good structural condition and is not classified as structurally deficient.
The bridge carries 642 vehicles per day and is 19 years old.
Its sufficiency rating of 78.2 is above the national average of 63.6.
For travelers with bridge anxiety
This bridge is likely to be a comfortable crossing for most travelers.
This bridge is 75 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 642 vehicles cross daily — very light traffic with low congestion risk.
The deck is 37 feet wide with 2-3 lanes — moderate 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
2007
19 years old
Structure Type
Prestressed Concrete Box Beam (Multiple)
Total Length
75 ft
22.9 m
Deck Width
37 ft
11.4 m
Spans
1
sections between supports
Max Span
72 ft
longest unsupported section (21.9 m)
Traffic Lanes
2 lanes
Two-way traffic
Daily Traffic
642vehicles/day
44.12063°N, 85.98300°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.