Why did the bridge go to therapy? It had too many spans of anxiety.
Why did the bridge go to therapy? It had too many spans of anxiety.
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over BONNEVILLE DAM
A-BRANCH FISHLADDER BRIDG
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 83 vehicles per day and is 88 years old.
Its sufficiency rating of 62.7 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 150 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 83 vehicles cross daily — very light traffic with low congestion risk.
The deck is 24 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
1938
88 years old
Structure Type
Concrete (Continuous) Stringer/Multi-beam/Girder
Total Length
150 ft
45.6 m
Deck Width
24 ft
7.3 m
Spans
3
sections between supports
Max Span
70 ft
longest unsupported section (21.3 m)
Traffic Lanes
2 lanes
Daily Traffic
83vehicles/day
45.64230°N, 121.94552°W
Concrete (Continuous) Stringer/Multi-beam/Girder
A concrete stringer bridge uses reinforced concrete beams running parallel to traffic. It combines the durability of concrete with efficient beam-based load distribution.
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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.