Why was the bridge always tired? Too many crossings.
Why was the bridge always tired? Too many crossings.
Almost there! Just bridging the gap...
over IRONDEQUOIT BAY
RTE 104-IRONDEQUOIT BAY
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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 65,994 vehicles per day and is 59 years old (reconstructed in 1980).
Its sufficiency rating of 62.2 places it below the national average of 63.6.
The NBI records a navigation clearance of 45 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 has some features that may be challenging for travelers with bridge anxiety. See the tips below for a more comfortable crossing.
This bridge is 2321 feet long — a longer crossing, over 1 minute.
A truss bridge — the steel framework can provide a sense of enclosure.
About 45 feet above ground — moderate height, similar to a 3-5 story building.
About 65,994 vehicles cross daily — heavy traffic, congestion likely during rush hours.
The deck is 89 feet wide with multiple lanes — easy to stay in a center lane.
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
1967
59 years old (rebuilt 1980)
Structure Type
Steel (Continuous) Truss (Deck)
Total Length
2,321 ft
707.4 m
Deck Width
89 ft
27.1 m
Spans
9
sections between supports
Max Span
357 ft
longest unsupported section (108.8 m)
Traffic Lanes
6 lanes
Two-way traffic
Clearance Below
45 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
65,994vehicles/day
43.21102°N, 77.53752°W
Steel (Continuous) Truss (Deck)
A steel truss bridge uses a framework of interconnected triangular elements. The geometric rigidity of triangles makes this design extremely efficient at distributing loads.
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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.