Connecting the data points... literally.
Connecting the data points... literally.
Why did the truss bridge break up with the beam bridge? It needed more support.
over SR 0230 AMTRAK NSRC
MULBERRY STREET
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 8,140 vehicles per day and is 117 years old (reconstructed in 2015).
Its sufficiency rating of 58.1 places it below the national average of 63.6.
The NBI records a navigation clearance of 18 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 1601 feet long — a moderate crossing, about 30 seconds.
An arch bridge design with some openness to the surroundings.
About 18 feet above ground — moderate height, similar to a 3-5 story building.
About 8,140 vehicles cross daily — light traffic, a smooth crossing.
The deck is 45 feet wide with 2-3 lanes — moderate 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
1909
117 years old (rebuilt 2015)
Structure Type
Concrete Arch (Deck)
Total Length
1,601 ft
488.0 m
Deck Width
45 ft
13.7 m
Spans
19
sections between supports
Max Span
101 ft
longest unsupported section (30.8 m)
Traffic Lanes
2 lanes
Two-way traffic
Clearance Below
18 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
8,140vehicles/day
40.26068°N, 76.87678°W
Concrete Arch (Deck)
A concrete arch bridge uses a curved concrete structure to transfer loads through compression. Concrete arches are durable and can be very aesthetically pleasing.
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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.