Structure 37 0257R · Santa Clara County, CA

Meridian Road (nb) over Interstate 280

Carries Meridian Road (nb) over Interstate 280, 04-scl-280-r3.99.

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 FT277 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

277 ft end to end, longest span 136 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 box-beam bridge.

Built197254 years old
Length276.9 ft84.4 m
Daily traffic16,740counted 1999
Last inspectedFebruary 2025every 24 months

Location

StateCalifornia
CountySanta Clara
Location04-scl-280-r3.99
CarriesMeridian Road (nb)
CrossesInterstate 280
Coordinates37.31492, -121.91492

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignBox Beam - Multiple
Total Length276.9 ft (84.4 m)
Max Span136.2 ft (41.5 m)
Deck Width50.9 ft (15.5 m)
Deck Area1308.2 sq m
Main Spans2
Year Built1972

Traffic

Avg Daily Traffic16,740 (1999)
Truck Traffic2%
Lanes On Bridge3
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 0257R

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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