Bridges: the original social network. Connecting communities since 850 BC.
Bridges: the original social network. Connecting communities since 850 BC.
Why don't bridges ever get lonely? Because they're always making connections.
over M-5621- CSX RR (340519C)
IN NORTHSIDE OF CALHOUN
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 72,600 vehicles per day and is 64 years old (reconstructed in 1987).
Its sufficiency rating of 56.7 places it below the national average of 63.6.
The NBI records a navigation clearance of 22 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 may cause some awareness for travelers with bridge anxiety, but has manageable characteristics.
This bridge is 317 feet long — a short crossing, about 10-15 seconds.
A standard overpass design with solid barriers on each side.
About 22 feet above ground — moderate height, similar to a 3-5 story building.
About 72,600 vehicles cross daily — heavy traffic, congestion likely during rush hours.
The deck is 139 feet wide with multiple lanes — easy to stay in a center lane.
This bridge crosses over land, not water — no water views 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
1962
64 years old (rebuilt 1987)
Structure Type
Steel (Continuous) Stringer/Multi-beam/Girder
Total Length
317 ft
96.6 m
Deck Width
139 ft
42.5 m
Spans
4
sections between supports
Max Span
86 ft
longest unsupported section (26.2 m)
Traffic Lanes
6 lanes
Two-way traffic
Clearance Below
22 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
72,600vehicles/day
34.55094°N, 84.93030°W
Steel (Continuous) Stringer/Multi-beam/Girder
A steel stringer bridge uses parallel steel beams (stringers) to support the deck. This is one of the most common bridge types in the US, valued for its simplicity and strength.
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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.