Crunching the numbers on America's infrastructure...
Crunching the numbers on America's infrastructure...
What did one bridge say to the other? 'You're looking a bit stressed.'
over LOWER BOONESFERRY
0.6 MI N OF TUALATIN RV
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This bridge has a Fair overall condition rating of 6 out of 9. While it is not classified as structurally deficient, it shows some deterioration that is being monitored.
The bridge carries 156,558 vehicles per day and is 51 years old.
Its sufficiency rating of 70.8 is above 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 222 feet long — a short crossing, about 10-15 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 156,558 vehicles cross daily — very heavy traffic, high congestion risk.
The deck is 135 feet wide with multiple lanes — easy to stay in a center lane.
This bridge crosses over land, not water — no water views 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
1975
51 years old
Structure Type
Concrete (Continuous) Box Beam (Multiple)
Total Length
222 ft
67.7 m
Deck Width
135 ft
41.2 m
Spans
3
sections between supports
Max Span
120 ft
longest unsupported section (36.6 m)
Traffic Lanes
6 lanes
Two-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
156,558vehicles/day
45.39641°N, 122.74719°W
Concrete (Continuous) Box Beam (Multiple)
A concrete box beam bridge uses hollow rectangular concrete sections. The box shape provides excellent torsional resistance and allows for longer spans.
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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.