Why was the bridge always tired? Too many crossings.
Why was the bridge always tired? Too many crossings.
Fun fact: Covered bridges were roofed to protect the wood, not the travelers.
over POWERHOUSE FOREBAY WATER
LOWER GRANITE DAM
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 50 vehicles per day and is 53 years old.
Its sufficiency rating of 63.5 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 164 feet long — a quick crossing, under 5 seconds at highway speed.
A standard overpass design with solid barriers on each side.
No height data available — likely a standard overpass height.
Only about 50 vehicles cross daily — very light traffic with low congestion risk.
The deck is 29 feet wide with 1-2 lanes — a narrower 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
1973
53 years old
Structure Type
Prestressed Concrete Stringer/Multi-beam/Girder
Total Length
164 ft
49.9 m
Deck Width
29 ft
8.9 m
Spans
2
sections between supports
Max Span
82 ft
longest unsupported section (24.9 m)
Traffic Lanes
2 lanes
Two-way traffic
Daily Traffic
50vehicles/day
46.65677°N, 117.43154°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.