Structure 43 0032 · San Benito County, CA

State Route 129 over US HWY 101 (@pm R4.90)

Carries State Route 129 over US HWY 101 (@pm R4.90), 05-sbt-129-r2.63.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT211 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

211 ft end to end, longest span 114 ft: about 3 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 multi-beam bridge.

Built196858 years old
Length211.0 ft64.3 m
Daily traffic10,600counted 2009
Last inspectedApril 2024every 24 months

Location

StateCalifornia
CountySan Benito
Location05-sbt-129-r2.63
CarriesState Route 129
CrossesUS HWY 101 (@pm R4.90)
Coordinates36.88259, -121.56191

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length211.0 ft (64.3 m)
Max Span113.5 ft (34.6 m)
Deck Width48.9 ft (14.9 m)
Deck Area958.1 sq m
Main Spans2
Year Built1968

Traffic

Avg Daily Traffic10,600 (2009)
Truck Traffic28%
Lanes On Bridge2
Lanes Under Bridge6

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number43 0032

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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