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Crunching the numbers on America's infrastructure...
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over SPEARFISH CK
0.2 W JCT US 85
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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 2,000 vehicles per day and is 55 years old.
Its sufficiency rating of 67.0 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 173 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 2,000 vehicles cross daily — light traffic, a smooth crossing.
The deck is 43 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
1971
55 years old
Structure Type
Steel (Continuous) Girder & Floorbeam
Total Length
173 ft
52.7 m
Deck Width
43 ft
13.0 m
Spans
3
sections between supports
Max Span
81 ft
longest unsupported section (24.8 m)
Traffic Lanes
2 lanes
Two-way traffic
Daily Traffic
2,000vehicles/day
44.51792°N, 103.86567°W
Steel (Continuous) Girder & Floorbeam
A steel girder bridge relies on large steel I-beams or plate girders as the primary load-bearing members. These bridges can span significant distances and carry heavy 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.