Analyzing deck conditions, superstructure ratings, and bad puns...
Analyzing deck conditions, superstructure ratings, and bad puns...
Why did the truss bridge break up with the beam bridge? It needed more support.
over KIAWAH RIVER
2 MI SW SEABROOK ISLAND
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 10,400 vehicles per day and is 39 years old.
Its sufficiency rating of 74.2 is above the national average of 63.6.
The NBI records a navigation clearance of 10 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 180 feet long — a short crossing, about 10-15 seconds.
A standard overpass design with solid barriers on each side.
About 10 feet above ground — standard overpass height.
About 10,400 vehicles cross daily — moderate traffic, some congestion possible.
The deck is 32 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
1987
39 years old
Structure Type
Prestressed Concrete Slab
Total Length
180 ft
54.9 m
Deck Width
32 ft
9.8 m
Spans
5
sections between supports
Max Span
36 ft
longest unsupported section (11.0 m)
Traffic Lanes
2 lanes
Two-way traffic
Clearance Below
10 ft
navigation clearance under deck
Daily Traffic
10,400vehicles/day
32.60385°N, 80.13226°W
Prestressed Concrete Slab
A prestressed concrete slab bridge uses a flat concrete deck that has been pretensioned for additional strength. Efficient for short to medium spans.
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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.