Fun fact: Covered bridges were roofed to protect the wood, not the travelers.
Fun fact: Covered bridges were roofed to protect the wood, not the travelers.
A bridge walked into a bar. The bartender said, 'Why the long span?'
over ILL RIVER
9.55 MI W OF ILL 89
Parametric wireframe generated from real NBI dimensions. Drag to rotate, scroll to zoom.
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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 7,000 vehicles per day and is 87 years old (reconstructed in 1990).
Its sufficiency rating of 56.9 places it below the national average of 63.6.
The NBI records a navigation clearance of 47 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 1573 feet long — a moderate crossing, about 30 seconds.
A truss bridge — the steel framework can provide a sense of enclosure.
About 47 feet above ground — moderate height, similar to a 3-5 story building.
About 7,000 vehicles cross daily — light traffic, a smooth crossing.
The deck is 29 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 (rebuilt 1990)
Structure Type
Steel (Continuous) Truss (Thru)
Total Length
1,573 ft
479.5 m
Deck Width
29 ft
8.8 m
Spans
3
sections between supports
Max Span
378 ft
longest unsupported section (115.2 m)
Traffic Lanes
2 lanes
Two-way traffic
Clearance Below
47 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
7,000vehicles/day
41.02634°N, 89.42053°W
Steel (Continuous) Truss (Thru)
A steel truss bridge uses a framework of interconnected triangular elements. The geometric rigidity of triangles makes this design extremely efficient at distributing 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.