What did one bridge say to the other? 'You're looking a bit stressed.'
What did one bridge say to the other? 'You're looking a bit stressed.'
A bridge's favorite type of music? Heavy metal. Or suspension... it depends.
over 3RD AVE BIG SIOUX RVR RR
EAST OF 2ND AVENUE - SF
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 5 out of 9. While it is not classified as structurally deficient, it shows some deterioration that is being monitored.
The bridge carries 12,500 vehicles per day and is 55 years old (reconstructed in 1986).
Its sufficiency rating of 60.2 places it below the national average of 63.6.
The NBI records a navigation clearance of 17 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 1578 feet long — a moderate crossing, about 30 seconds.
A standard overpass design with solid barriers on each side.
About 17 feet above ground — moderate height, similar to a 3-5 story building.
About 12,500 vehicles cross daily — moderate traffic, some congestion possible.
The deck is 49 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 (rebuilt 1986)
Structure Type
Steel (Continuous) Stringer/Multi-beam/Girder
Total Length
1,578 ft
481.1 m
Deck Width
49 ft
14.8 m
Spans
19
sections between supports
Max Span
140 ft
longest unsupported section (42.7 m)
Traffic Lanes
3 lanes
One-way traffic
Clearance Below
17 ft
navigation clearance under deck
Clearance height compared to familiar objects
Height shown is the navigation clearance below the bridge deck. The total height of the bridge structure (including towers and superstructure) may be higher.
Daily Traffic
12,500vehicles/day
43.54642°N, 96.71792°W
Steel (Continuous) Stringer/Multi-beam/Girder
A steel stringer bridge uses parallel steel beams (stringers) to support the deck. This is one of the most common bridge types in the US, valued for its simplicity and strength.
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.