Gathering condition ratings from coast to coast...
Gathering condition ratings from coast to coast...
A bridge walked into a bar. The bartender said, 'Why the long span?'
over BIG ISLAND SLOUGH
0.7 MI E OF UNDERWOOD RD
Parametric wireframe generated from real NBI dimensions. Drag to rotate, scroll to zoom.
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This bridge has a Good overall condition rating of 7 out of 9. It is in good structural condition and is not classified as structurally deficient.
The bridge carries 21,750 vehicles per day and is 33 years old.
Its sufficiency rating of 63.8 is above 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 165 feet long — a short crossing, about 10-15 seconds.
A standard overpass design with solid barriers on each side.
No height data available — likely a standard overpass height.
About 21,750 vehicles cross daily — moderate traffic, some congestion possible.
The deck is 37 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
1993
33 years old
Structure Type
Prestressed Concrete Box Beam (Multiple)
Total Length
165 ft
50.3 m
Deck Width
37 ft
11.4 m
Spans
3
sections between supports
Max Span
55 ft
longest unsupported section (16.8 m)
Traffic Lanes
2 lanes
One-way traffic
Daily Traffic
21,750vehicles/day
29.65170°N, 95.07576°W
Prestressed Concrete Box Beam (Multiple)
A prestressed concrete box beam bridge combines hollow box sections with prestressing technology, enabling longer spans with reduced weight and material usage.
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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.