Structure 29 0051 · San Joaquin County, CA

State Route 4 over Private Access

Carries State Route 4 over Private Access, 10-sj-004-14.22.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 5 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating5/9 · Fair
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
24 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 5/9 · sets the ratingSubstructure 7/9

24 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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.

Built193393 years old
Length24.0 ft7.3 m
Daily traffic19,950counted 2009
Last inspectedJune 2023every 24 months

Location

StateCalifornia
CountySan Joaquin
Location10-sj-004-14.22
CarriesState Route 4
CrossesPrivate Access
Coordinates37.92890, -121.32696

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length24.0 ft (7.3 m)
Max Span23.0 ft (7 m)
Deck Width30.8 ft (9.4 m)
Deck Area68.6 sq m
Main Spans1
Year Built1933

Traffic

Avg Daily Traffic19,950 (2009)
Truck Traffic17%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number29 0051

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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