Structure 37C0122 · Santa Clara County, CA

S Whisman Road over Up Rr Central Exp Evelyn

Carries S Whisman Road over Up Rr Central Exp Evelyn, At Central Expwy.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT383 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 7/9

383 ft end to end: about 5 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 tee-beam bridge.

Built196759 years old
Length382.9 ft116.7 m
Daily traffic11,000counted 2015
Last inspectedSeptember 2023every 24 months

Location

StateCalifornia
CountySanta Clara
LocationAt Central Expwy
CarriesS Whisman Road
CrossesUp Rr Central Exp Evelyn
Coordinates37.38876, -122.06304

Physical Characteristics

MaterialPrestressed Concrete
DesignTee Beam
Total Length382.9 ft (116.7 m)
Max Span75.1 ft (22.9 m)
Deck Width71.5 ft (21.8 m)
Deck Area2544.1 sq m
Main Spans1
Year Built1967

Traffic

Avg Daily Traffic11,000 (2015)
Truck Traffic2%
Lanes On Bridge4
Lanes Under Bridge6

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number37C0122

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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