The average US bridge is 48 years old. That's a lot of birthday candles.
The average US bridge is 48 years old. That's a lot of birthday candles.
Did you know? The oldest bridge in the NBI was built in 1697.
over MON RIVER & PRIVATE RR
145 Hot Metal 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 17,500 vehicles per day and is 122 years old (reconstructed in 2000).
Its sufficiency rating of 56.5 places it below the national average of 63.6.
The NBI records a navigation clearance of 48 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 1117 feet long — a moderate crossing, about 30 seconds.
A truss bridge — the steel framework can provide a sense of enclosure.
About 48 feet above ground — moderate height, similar to a 3-5 story building.
About 17,500 vehicles cross daily — moderate traffic, some congestion possible.
The deck is 28 feet wide with 1-2 lanes — a narrower crossing.
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
1904
122 years old (rebuilt 2000)
Structure Type
Steel Truss (Thru)
Total Length
1,117 ft
340.5 m
Deck Width
28 ft
8.4 m
Spans
5
sections between supports
Max Span
321 ft
longest unsupported section (97.8 m)
Traffic Lanes
2 lanes
Two-way traffic
Clearance Below
48 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
17,500vehicles/day
40.42863°N, 79.96024°W
Steel Truss (Thru)
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.