Fetching data from the National Bridge Inventory...
Fetching data from the National Bridge Inventory...
Fetching data from the National Bridge Inventory...
over GREAT NORTHERN AREA
HELENA-LYNDALE AVE
Parametric wireframe generated from real NBI dimensions. Drag to rotate, scroll to zoom.
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This bridge has a Good overall condition rating of 7 out of 9. It is in good structural condition and is not classified as structurally deficient.
The bridge carries 20,397 vehicles per day and is 23 years old.
Its sufficiency rating of 75.8 is above the national average of 63.6.
The NBI records a navigation clearance of 12 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 is likely to be a comfortable crossing for most travelers.
This bridge is 20 feet long — a quick crossing, under 5 seconds at highway speed.
An arch bridge design with some openness to the surroundings.
About 12 feet above ground — standard overpass height.
About 20,397 vehicles cross daily — moderate traffic, some congestion possible.
The deck is 98 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
2003
23 years old
Structure Type
Concrete Arch (Deck)
Total Length
20 ft
6.1 m
Deck Width
98 ft
29.9 m
Spans
1
sections between supports
Max Span
20 ft
longest unsupported section (6.1 m)
Traffic Lanes
4 lanes
Two-way traffic
Clearance Below
12 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
20,397vehicles/day
46.59809°N, 112.03612°W
Concrete Arch (Deck)
A concrete arch bridge uses a curved concrete structure to transfer loads through compression. Concrete arches are durable and can be very aesthetically pleasing.
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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.