Loading 624,191 bridges... give or take a few.
Loading 624,191 bridges... give or take a few.
Loading 624,191 bridges... give or take a few.
over BLACK RIVER
IN PORT HURON
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 15,710 vehicles per day and is 69 years old (reconstructed in 2002).
Its sufficiency rating of 59.1 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 375 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 15,710 vehicles cross daily — moderate traffic, some congestion possible.
The deck is 57 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 2002)
Structure Type
Steel Movable (Bascule)
Total Length
375 ft
114.3 m
Deck Width
57 ft
17.5 m
Spans
1
sections between supports
Max Span
190 ft
longest unsupported section (57.9 m)
Traffic Lanes
4 lanes
Two-way traffic
Clearance Below
1 ft
navigation clearance under deck
Daily Traffic
15,710vehicles/day
42.98053°N, 82.43353°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.