Structure 37 0251R · Santa Clara County, CA

NB Interstate 280 over Arastradero Road

Carries NB Interstate 280 over Arastradero Road, 04-scl-280-17.78-lah.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT132 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

132 ft end to end, longest span 71 ft. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a box-beam bridge.

Built196759 years old
Length131.9 ft40.2 m
Daily traffic58,500counted 2009
Last inspectedFebruary 2024every 24 months

Location

StateCalifornia
CountySanta Clara
Location04-scl-280-17.78-lah
CarriesNB Interstate 280
CrossesArastradero Road
Coordinates37.38639, -122.15314

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length131.9 ft (40.2 m)
Max Span70.9 ft (21.6 m)
Deck Width69.2 ft (21.1 m)
Deck Area848.2 sq m
Main Spans2
Year Built1967

Traffic

Avg Daily Traffic58,500 (2009)
Truck Traffic2%
Lanes On Bridge4
Lanes Under Bridge2

Inspection & Ownership

Last InspectionFebruary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number37 0251R

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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