Analyzing deck conditions, superstructure ratings, and bad puns...
Analyzing deck conditions, superstructure ratings, and bad puns...
Why did the bridge go to therapy? It had too many spans of anxiety.
over IRWIN CREEK
04-MRN-101-11.20-SRF
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 129,000 vehicles per day and is 131 years old (reconstructed in 1987).
Its sufficiency rating of 51.8 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 207 feet long — a short crossing, about 10-15 seconds.
This is a culvert — you may not even notice you're crossing it.
No height data available — likely a standard overpass height.
About 129,000 vehicles cross daily — very heavy traffic, high congestion risk.
The deck is 0 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
1895
131 years old (rebuilt 1987)
Structure Type
Concrete Culvert
Total Length
207 ft
63.0 m
Spans
1
sections between supports
Max Span
15 ft
longest unsupported section (4.6 m)
Traffic Lanes
9 lanes
Two-way traffic
Daily Traffic
129,000vehicles/day
37.97689°N, 122.52026°W
Concrete Culvert
A concrete culvert is a drainage structure that allows water to flow beneath a road. While technically not a traditional bridge, culverts over 20 feet are tracked in the national inventory.
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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.