Why do engineers love bridges? They're outstanding in their field.
Why do engineers love bridges? They're outstanding in their field.
Wow, there are a lot of bridges here... one second please.
over WATER MERRIMACK RIVER
JUST EAST OF MIDDLESEX RD
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 15,470 vehicles per day and is 96 years old (reconstructed in 2013).
Its sufficiency rating of 58.4 places it below the national average of 63.6.
For travelers with bridge anxiety
This bridge may cause some awareness for travelers with bridge anxiety, but has manageable characteristics.
This bridge is 591 feet long — a short crossing, about 10-15 seconds.
An arch bridge design with some openness to the surroundings.
No height data available — likely a standard overpass height.
About 15,470 vehicles cross daily — moderate traffic, some congestion possible.
The deck is 42 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
1930
96 years old (rebuilt 2013)
Structure Type
Steel Arch (Thru)
Total Length
591 ft
180.0 m
Deck Width
42 ft
12.7 m
Spans
1
sections between supports
Max Span
547 ft
longest unsupported section (166.7 m)
Traffic Lanes
2 lanes
Two-way traffic
Daily Traffic
15,470vehicles/day
42.67615°N, 71.42120°W
Steel Arch (Thru)
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.