Loading structural data... this is riveting stuff.
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Why was the bridge always tired? Too many crossings.
over EEL RIVER & NWP RR
0.5 MI SE OF ALDERPOINT
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 240 vehicles per day and is 54 years old.
Its sufficiency rating of 60.1 places it below the national average of 63.6.
The NBI records a navigation clearance of 31 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 762 feet long — a moderate crossing, about 30 seconds.
A standard overpass design with solid barriers on each side.
About 31 feet above ground — moderate height, similar to a 3-5 story building.
Only about 240 vehicles cross daily — very light traffic with low congestion risk.
The deck is 30 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
1972
54 years old
Structure Type
Steel (Continuous) Stringer/Multi-beam/Girder
Total Length
762 ft
232.3 m
Deck Width
30 ft
9.1 m
Spans
3
sections between supports
Max Span
280 ft
longest unsupported section (85.3 m)
Traffic Lanes
2 lanes
Two-way traffic
Clearance Below
31 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
240vehicles/day
40.17291°N, 123.60490°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.
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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.