Why did the truss bridge break up with the beam bridge? It needed more support.
Why did the truss bridge break up with the beam bridge? It needed more support.
Gathering condition ratings from coast to coast...
over CLARK FORK RIVER
MISSOULA-MADISON ST
Parametric wireframe generated from real NBI dimensions. Drag to rotate, scroll to zoom.
Loading 3D model...
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 18,393 vehicles per day and is 68 years old (reconstructed in 2017).
Its sufficiency rating of 59.2 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 552 feet long — a short crossing, about 10-15 seconds.
A standard overpass design with solid barriers on each side.
No height data available — likely a standard overpass height.
About 18,393 vehicles cross daily — moderate traffic, some congestion possible.
The deck is 69 feet wide with multiple lanes — easy to stay in a center lane.
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
1958
68 years old (rebuilt 2017)
Structure Type
Steel (Continuous) Girder & Floorbeam
Total Length
552 ft
168.2 m
Deck Width
69 ft
20.9 m
Spans
3
sections between supports
Max Span
150 ft
longest unsupported section (45.7 m)
Traffic Lanes
4 lanes
Two-way traffic
Daily Traffic
18,393vehicles/day
46.86696°N, 113.98786°W
Steel (Continuous) Girder & Floorbeam
A steel girder bridge relies on large steel I-beams or plate girders as the primary load-bearing members. These bridges can span significant distances and carry heavy loads.
Learn more about this bridge typeNo ratings yet. Be the first to rate this bridge!
Sign in and track Montana to receive alerts when new inspection data is published. Premium members get bridge-specific notifications.
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.