Structure 37 0273R · Santa Clara County, CA

NB Route 87 & Ramp over N87-n280 Con & Auzerais

Carries NB Route 87 & Ramp over N87-n280 Con & Auzerais, 04-scl-087-5.21-sjs.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT821 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

821 ft end to end: about 2.3 football fields. 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.

Built1970rebuilt 2007
Length820.9 ft250.2 m
Daily traffic65,000counted 2009
Last inspectedJanuary 2024every 24 months

Location

StateCalifornia
CountySanta Clara
Location04-scl-087-5.21-sjs
CarriesNB Route 87 & Ramp
CrossesN87-n280 Con & Auzerais
Coordinates37.32456, -121.89228

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length820.9 ft (250.2 m)
Max Span99.1 ft (30.2 m)
Deck Width51.8 ft (15.8 m)
Deck Area3953.2 sq m
Main Spans1
Year Built1970 (reconstructed 2007)

Traffic

Avg Daily Traffic65,000 (2009)
Truck Traffic3%
Lanes On Bridge3
Lanes Under Bridge6

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 0273R

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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