Wow, there are a lot of bridges here... one second please.
Wow, there are a lot of bridges here... one second please.
If I had a dime for every bridge I've crossed, I'd have about ten bucks by now.
over KNIK RIVER ACCESS U.C.
MILE POINT 29.7
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 8 out of 9. It is in good structural condition and is not classified as structurally deficient.
The bridge carries 26,600 vehicles per day and is 33 years old.
Its sufficiency rating of 77.9 is above the national average of 63.6.
The NBI records a navigation clearance of 13 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 60 feet long — a quick crossing, under 5 seconds at highway speed.
This is a culvert — you may not even notice you're crossing it.
About 13 feet above ground — standard overpass height.
About 26,600 vehicles cross daily — moderate traffic, some congestion possible.
The deck is 0 feet wide — a very narrow, single-lane crossing.
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
1993
33 years old
Structure Type
Steel Culvert
Total Length
60 ft
18.3 m
Spans
2
sections between supports
Max Span
25 ft
longest unsupported section (7.7 m)
Traffic Lanes
4 lanes
Two-way traffic
Clearance Below
13 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
26,600vehicles/day
61.48930°N, 149.24510°W
Steel Culvert
A steel stringer bridge uses parallel steel beams (stringers) to support the deck. This is one of the most common bridge types in the US, valued for its simplicity and strength.
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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.