Gathering condition ratings from coast to coast...
Gathering condition ratings from coast to coast...
Did you know? The oldest bridge in the NBI was built in 1697.
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2.4E JCT US14A -SPEARFISH
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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 1,500 vehicles per day and is 48 years old.
Its sufficiency rating of 65.1 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 93 feet long — a quick crossing, under 5 seconds at highway speed.
A standard overpass design with solid barriers on each side.
No height data available — likely a standard overpass height.
About 1,500 vehicles cross daily — light traffic, a smooth crossing.
The deck is 35 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
1978
48 years old
Structure Type
Concrete (Continuous) Slab
Total Length
93 ft
28.3 m
Deck Width
35 ft
10.6 m
Spans
3
sections between supports
Max Span
30 ft
longest unsupported section (9.1 m)
Traffic Lanes
2 lanes
Two-way traffic
Daily Traffic
1,500vehicles/day
44.47472°N, 103.79644°W
Concrete (Continuous) Slab
A concrete slab bridge is a simple, solid concrete deck that acts as both the structural support and driving surface. Common for short spans, they are durable and low-maintenance.
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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.