Structure 37 0206 · Santa Clara County, CA

De Anza Boulevard over Interstate 280

Carries De Anza Boulevard over Interstate 280, 04-scl-280-9.43-cpo.

Overall conditionFair

Set by its lowest-rated component: Deck at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT230 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

230 ft end to end, longest span 80 ft: about 3 semi-trucks nose to tail. 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.

Built1965rebuilt 1996
Length230.0 ft70.1 m
Daily traffic138,500counted 2012
Last inspectedJanuary 2024every 24 months

Location

StateCalifornia
CountySanta Clara
Location04-scl-280-9.43-cpo
CarriesDe Anza Boulevard
CrossesInterstate 280
Coordinates37.33406, -122.03211

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length230.0 ft (70.1 m)
Max Span80.1 ft (24.4 m)
Deck Width152.9 ft (46.6 m)
Deck Area3266.7 sq m
Main Spans4
Year Built1965 (reconstructed 1996)

Traffic

Avg Daily Traffic138,500 (2012)
Truck Traffic5%
Lanes On Bridge10
Lanes Under Bridge8

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number37 0206

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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