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A bridge's favorite type of music? Heavy metal. Or suspension... it depends.
over THUNDER BAY RIVER
0.2 MI E OF US23
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 5 out of 9. While it is not classified as structurally deficient, it shows some deterioration that is being monitored.
The bridge carries 15,700 vehicles per day and is 87 years old (reconstructed in 1988).
Its sufficiency rating of 57.4 places it below the national average of 63.6.
The NBI records a navigation clearance of 1 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 264 feet long — a short crossing, about 10-15 seconds.
A movable bridge — it may occasionally stop for boat traffic.
About 1 feet above ground — standard overpass height.
About 15,700 vehicles cross daily — moderate traffic, some congestion possible.
The deck is 62 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
1939
87 years old (rebuilt 1988)
Structure Type
Steel Movable (Bascule)
Total Length
264 ft
80.6 m
Deck Width
62 ft
18.9 m
Spans
1
sections between supports
Max Span
127 ft
longest unsupported section (38.7 m)
Traffic Lanes
3 lanes
Two-way traffic
Clearance Below
1 ft
navigation clearance under deck
Daily Traffic
15,700vehicles/day
45.06390°N, 83.43060°W
Steel Movable (Bascule)
A movable bridge can change position to allow passage of boats or other traffic. Steel movable bridges include lift, bascule (drawbridge), and swing types.
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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.