Analyzing deck conditions, superstructure ratings, and bad puns...
Analyzing deck conditions, superstructure ratings, and bad puns...
A bridge's favorite type of music? Heavy metal. Or suspension... it depends.
over SPOUT RUN & SPOUT RUN PA
7.8 MILES SOUTH OF I-495.
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 6 out of 9. While it is not classified as structurally deficient, it shows some deterioration that is being monitored.
The bridge carries 27,400 vehicles per day and is 67 years old (reconstructed in 1991).
Its sufficiency rating of 66.2 is above the national average of 63.6.
The NBI records a navigation clearance of 44 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 335 feet long — a short crossing, about 10-15 seconds.
An arch bridge design with some openness to the surroundings.
About 44 feet above ground — moderate height, similar to a 3-5 story building.
About 27,400 vehicles cross daily — moderate traffic, some congestion possible.
The deck is 38 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
1959
67 years old (rebuilt 1991)
Structure Type
Concrete Arch (Deck)
Total Length
335 ft
102.0 m
Deck Width
38 ft
11.6 m
Spans
1
sections between supports
Max Span
230 ft
longest unsupported section (70.1 m)
Traffic Lanes
2 lanes
One-way traffic
Clearance Below
44 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
27,400vehicles/day
38.90150°N, 77.08267°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.