Structure 29 0060 · San Joaquin County, CA

State Route 88 over Calaveras River

Carries State Route 88 over Calaveras River, 10-sj-088-6.10.

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
Channelnot part of overall4/9 · Poor
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT74 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 5/9 · sets the ratingSubstructure 7/9

74 ft end to end. Lengths and the car 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 girder bridge.

Built194779 years old
Length74.1 ft22.6 m
Daily traffic6,700counted 2009
Last inspectedMarch 2023every 24 months

Location

StateCalifornia
CountySan Joaquin
Location10-sj-088-6.10
CarriesState Route 88
CrossesCalaveras River
Coordinates38.05190, -121.18800

Physical Characteristics

MaterialSteel
DesignGirder and Floorbeam
Total Length74.1 ft (22.6 m)
Max Span68.2 ft (20.8 m)
Deck Width30.2 ft (9.2 m)
Deck Area207.9 sq m
Main Spans1
Year Built1947

Traffic

Avg Daily Traffic6,700 (2009)
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number29 0060

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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