Structure 35 0263G · San Mateo County, CA

E380-s101 Connectr over S101-san Bruno Av 7th Av

Carries E380-s101 Connectr over S101-san Bruno Av 7th Av, 04-sm-380-6.19-sbr.

Overall conditionPoor

Set by its lowest-rated component: Deck at 4 of 9.

How ratings work
Decksets the rating4/9 · Poor
Superstructure7/9 · Good
Substructure7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,369 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 7/9Substructure 7/9

1,369 ft end to end, longest span 150 ft: about 3.8 football fields. 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.

Built197650 years old
Length1369.4 ft417.4 m
Daily traffic42,000counted 2005
Last inspectedFebruary 2024every 24 months

Location

StateCalifornia
CountySan Mateo
Location04-sm-380-6.19-sbr
CarriesE380-s101 Connectr
CrossesS101-san Bruno Av 7th Av
Coordinates37.63379, -122.40617

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignBox Beam - Multiple
Total Length1369.4 ft (417.4 m)
Max Span149.6 ft (45.6 m)
Deck Width43.0 ft (13.1 m)
Deck Area5467.9 sq m
Main Spans6
Year Built1976

Traffic

Avg Daily Traffic42,000 (2005)
Truck Traffic6%
Lanes On Bridge2
Lanes Under Bridge5

Inspection & Ownership

Last InspectionFebruary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number35 0263G

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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