Structure 29C0231 · San Joaquin County, CA

Howard Road over San Joaquin River 01

Carries Howard Road over San Joaquin River 01, 1.6 Mi W Of S Wolfe RD.

Overall conditionPoor

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

How ratings work
Decksets the rating4/9 · Poor
Superstructure8/9 · Very Good
Substructure7/9 · Good
Channelnot part of overall9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT363 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 8/9Substructure 7/9

363 ft end to end, longest span 120 ft: about 5 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.

Built197551 years old
Length362.5 ft110.5 m
Daily traffic1,482counted 2013
Last inspectedSeptember 2024every 24 months

Location

StateCalifornia
CountySan Joaquin
Location1.6 Mi W Of S Wolfe RD
CarriesHoward Road
CrossesSan Joaquin River 01
Coordinates37.87775, -121.33261

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length362.5 ft (110.5 m)
Max Span120.1 ft (36.6 m)
Deck Width33.5 ft (10.2 m)
Deck Area1127.1 sq m
Main Spans3
Year Built1975

Traffic

Avg Daily Traffic1,482 (2013)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number29C0231

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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