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40th Street Bridge
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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 26,091 vehicles per day and is 102 years old (reconstructed in 1991).
Its sufficiency rating of 58.5 places it below the national average of 63.6.
The NBI records a navigation clearance of 15 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 2432 feet long — a longer crossing, over 1 minute.
An arch bridge design with some openness to the surroundings.
About 15 feet above ground — standard overpass height.
About 26,091 vehicles cross daily — moderate traffic, some congestion possible.
The deck is 54 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
1924
102 years old (rebuilt 1991)
Structure Type
Steel Arch (Deck)
Total Length
2,432 ft
741.3 m
Deck Width
54 ft
16.5 m
Spans
3
sections between supports
Max Span
380 ft
longest unsupported section (115.8 m)
Traffic Lanes
3 lanes
Two-way traffic
Clearance Below
15 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
26,091vehicles/day
40.47236°N, 79.96786°W
Steel Arch (Deck)
A steel arch bridge uses a curved steel structure to carry loads primarily through compression. These bridges are known for their elegant appearance and structural efficiency.
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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.