Loading... unlike some bridges, we promise not to leave you hanging.
Loading... unlike some bridges, we promise not to leave you hanging.
Why did the truss bridge break up with the beam bridge? It needed more support.
over SOUTH BR LONETREE CK
9.6E & 1.3S TRIPP
Parametric wireframe generated from real NBI dimensions. Drag to rotate, scroll to zoom.
Loading 3D model...
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 69 vehicles per day and is 87 years old.
Its sufficiency rating of 61.6 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 36 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.
Only about 69 vehicles cross daily — very light traffic with low congestion risk.
The deck is 27 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
1939
87 years old
Structure Type
Concrete (Continuous) Slab
Total Length
36 ft
11.1 m
Deck Width
27 ft
8.3 m
Spans
2
sections between supports
Max Span
16 ft
longest unsupported section (4.9 m)
Traffic Lanes
2 lanes
Two-way traffic
Daily Traffic
69vehicles/day
43.20849°N, 97.77626°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.
Learn more about this bridge typeNo ratings yet. Be the first to rate this bridge!
Sign in and track South Dakota to receive alerts when new inspection data is published. Premium members get bridge-specific notifications.
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.