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.
Did you know? The oldest bridge in the NBI was built in 1697.
over BITTERROOT RIVER
MISSOULA-BROOKS ST
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 6 out of 9. While it is not classified as structurally deficient, it shows some deterioration that is being monitored.
The bridge carries 28,185 vehicles per day and is 58 years old (reconstructed in 1995).
Its sufficiency rating of 64.2 is above 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 347 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 28,185 vehicles cross daily — moderate traffic, some congestion possible.
The deck is 86 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
1968
58 years old (rebuilt 1995)
Structure Type
Prestressed Concrete Stringer/Multi-beam/Girder
Total Length
347 ft
105.7 m
Deck Width
86 ft
26.2 m
Spans
4
sections between supports
Max Span
87 ft
longest unsupported section (26.5 m)
Traffic Lanes
4 lanes
Two-way traffic
Daily Traffic
28,185vehicles/day
46.83147°N, 114.05458°W
Prestressed Concrete Stringer/Multi-beam/Girder
A prestressed concrete stringer bridge uses pretensioned concrete beams, where steel tendons are stretched before concrete is poured. This creates stronger, lighter 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.