Structure 37 0280R · Santa Clara County, CA

NB Interstate 280 over 7th Street

Carries NB Interstate 280 over 7th Street, 04-scl-280-r1.55-sjs.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructure8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT122 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 8/9

122 ft end to end. 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.

Built197254 years old
Length122.0 ft37.2 m
Daily traffic111,700counted 2019
Last inspectedJanuary 2025every 48 months

Location

StateCalifornia
CountySanta Clara
Location04-scl-280-r1.55-sjs
CarriesNB Interstate 280
Crosses7th Street
Coordinates37.32809, -121.87569

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length122.0 ft (37.2 m)
Max Span120.1 ft (36.6 m)
Deck Width67.9 ft (20.7 m)
Deck Area770.0 sq m
Main Spans1
Year Built1972

Traffic

Avg Daily Traffic111,700 (2019)
Truck Traffic3%
Lanes On Bridge4
Lanes Under Bridge3

Inspection & Ownership

Last InspectionJanuary 2025
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number37 0280R

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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