Structure 37 0403L · Santa Clara County, CA

SB State Route 87 over US Highway 101 & Conns

Carries SB State Route 87 over US Highway 101 & Conns, 04-scl-087-9.08-sjs.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,709 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 5/9 · sets the rating

1,709 ft end to end, longest span 185 ft: about 4.7 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.

Built199234 years old
Length1709.3 ft521 m
Daily traffic40,500counted 2009
Last inspectedJanuary 2024every 24 months

Location

StateCalifornia
CountySanta Clara
Location04-scl-087-9.08-sjs
CarriesSB State Route 87
CrossesUS Highway 101 & Conns
Coordinates37.37149, -121.92726

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignBox Beam - Multiple
Total Length1709.3 ft (521 m)
Max Span185.4 ft (56.5 m)
Deck Width39.4 ft (12 m)
Deck Area6,252 sq m
Main Spans11
Year Built1992

Traffic

Avg Daily Traffic40,500 (2009)
Truck Traffic3%
Lanes On Bridge2
Lanes Under Bridge13

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 0403L

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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