Fun fact: Covered bridges were roofed to protect the wood, not the travelers.
Fun fact: Covered bridges were roofed to protect the wood, not the travelers.
Did you know? The oldest bridge in the NBI was built in 1697.
over Shasta Lake
02-SHA-005-R28.14
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 5 out of 9. While it is not classified as structurally deficient, it shows some deterioration that is being monitored.
The bridge carries 19,500 vehicles per day and is 85 years old (reconstructed in 2008).
Its sufficiency rating of 62.1 places it below the national average of 63.6.
The NBI records a navigation clearance of 2 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 has some features that may be challenging for travelers with bridge anxiety. See the tips below for a more comfortable crossing.
This bridge is 3588 feet long — an extended crossing, several minutes.
A truss bridge — the steel framework can provide a sense of enclosure.
About 2 feet above ground — standard overpass height.
About 19,500 vehicles cross daily — moderate traffic, some congestion possible.
The deck is 62 feet wide with 3-4 lanes — standard width.
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
1941
85 years old (rebuilt 2008)
Structure Type
Steel Truss (Deck)
Total Length
3,588 ft
1093.6 m
Deck Width
62 ft
18.9 m
Spans
8
sections between supports
Max Span
630 ft
longest unsupported section (192.0 m)
Traffic Lanes
4 lanes
Two-way traffic
Clearance Below
2 ft
navigation clearance under deck
Daily Traffic
19,500vehicles/day
40.76166°N, 122.31861°W
Steel Truss (Deck)
A steel truss bridge uses a framework of interconnected triangular elements. The geometric rigidity of triangles makes this design extremely efficient at distributing loads.
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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.