Structure 37 0166 · Santa Clara County, CA

San Tomas Expwy over U.s. Highway 101

Carries San Tomas Expwy over U.s. Highway 101, 04-scl-101-41.98-scl.

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 FT286 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

286 ft end to end, longest span 82 ft: about 4 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 multi-beam bridge.

Built1961rebuilt 1983
Length286.1 ft87.2 m
Daily traffic87,360counted 2001
Last inspectedFebruary 2025every 24 months

Location

StateCalifornia
CountySanta Clara
Location04-scl-101-41.98-scl
CarriesSan Tomas Expwy
CrossesU.s. Highway 101
Coordinates37.38160, -121.96393

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length286.1 ft (87.2 m)
Max Span82.0 ft (25 m)
Deck Width127.6 ft (38.9 m)
Deck Area3392.1 sq m
Main Spans4
Year Built1961 (reconstructed 1983)

Traffic

Avg Daily Traffic87,360 (2001)
Truck Traffic1%
Lanes On Bridge8
Lanes Under Bridge12

Inspection & Ownership

Last InspectionFebruary 2025
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number37 0166

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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