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Crunching the numbers on America's infrastructure...
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over BIRCH STREET VIADUCT
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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 200 vehicles per day and is 66 years old (reconstructed in 1979).
Its sufficiency rating of 41.3 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 704 feet long — a moderate crossing, about 30 seconds.
A standard overpass design with solid barriers on each side.
No height data available — likely a standard overpass height.
Only about 200 vehicles cross daily — very light traffic with low congestion risk.
The deck is 14 feet wide — a very narrow, single-lane 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
1960
66 years old (rebuilt 1979)
Structure Type
Wood/Timber Stringer/Multi-beam/Girder
Total Length
704 ft
214.7 m
Deck Width
14 ft
4.3 m
Spans
70
sections between supports
Max Span
13 ft
longest unsupported section (4.0 m)
Traffic Lanes
1 lane
Daily Traffic
200vehicles/day
56.80996°N, 132.95586°W
Wood/Timber Stringer/Multi-beam/Girder
A timber stringer bridge uses wooden beams as the primary structure. While less common today, timber bridges remain practical for low-traffic rural roads and historic settings.
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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.