Structure 29C0127 · San Joaquin County, CA

Manthey Road over San Joaquin River

Carries Manthey Road over San Joaquin River, 0.2 Mi NE Of Stewart RD.

Overall conditionPoor

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

How ratings work
Decksets the rating4/9 · Poor
Superstructure5/9 · Fair
Substructure5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT537 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 5/9Substructure 5/9

537 ft end to end, longest span 200 ft: about 7 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 through truss.

Built1926100 years old
Length536.7 ft163.6 m
Daily traffic750counted 1987
Last inspectedSeptember 2024every 24 months

Location

StateCalifornia
CountySan Joaquin
Location0.2 Mi NE Of Stewart RD
CarriesManthey Road
CrossesSan Joaquin River
Coordinates37.78532, -121.30764

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length536.7 ft (163.6 m)
Max Span200.5 ft (61.1 m)
Deck Width33.5 ft (10.2 m)
Deck Area1668.7 sq m
Main Spans2
Year Built1926

Traffic

Avg Daily Traffic750 (1987)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number29C0127

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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