Structure 35 0157R · San Mateo County, CA

EB State Route 92 over Caltrain Up Rr Pacific

Carries EB State Route 92 over Caltrain Up Rr Pacific, 04-sm-092-r11.38-sm.

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 FT318 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

318 ft end to end, longest span 87 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.

Built196363 years old
Length317.9 ft96.9 m
Daily traffic36,000counted 2009
Last inspectedAugust 2022every 48 months

Location

StateCalifornia
CountySan Mateo
Location04-sm-092-r11.38-sm
CarriesEB State Route 92
CrossesCaltrain Up Rr Pacific
Coordinates37.55162, -122.30953

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length317.9 ft (96.9 m)
Max Span86.9 ft (26.5 m)
Deck Width49.5 ft (15.1 m)
Deck Area1463.2 sq m
Main Spans5
Year Built1963

Traffic

Avg Daily Traffic36,000 (2009)
Truck Traffic3%
Lanes On Bridge3
Lanes Under Bridge6

Inspection & Ownership

Last InspectionAugust 2022
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number35 0157R

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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