Structure 43 0004R · San Benito County, CA

US Highway 101 NB over San Benito River

Carries US Highway 101 NB over San Benito River, 05-sbt-101-5.21.

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
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT722 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 7/9

722 ft end to end, longest span 102 ft: about 2.0 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 multi-beam bridge.

Built195175 years old
Length722.1 ft220.1 m
Daily traffic25,500counted 2009
Last inspectedApril 2024every 24 months

Location

StateCalifornia
CountySan Benito
Location05-sbt-101-5.21
CarriesUS Highway 101 NB
CrossesSan Benito River
Coordinates36.88661, -121.55910

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length722.1 ft (220.1 m)
Max Span102.0 ft (31.1 m)
Deck Width32.5 ft (9.9 m)
Deck Area2179.0 sq m
Main Spans3
Year Built1951

Traffic

Avg Daily Traffic25,500 (2009)
Truck Traffic17%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number43 0004R

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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