Structure 38C0117 · Stanislaus County, CA

Howard Road over California Aqueduct

Carries Howard Road over California Aqueduct, 0.7 Mi E Of I-5.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT178 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 7/9

178 ft end to end, longest span 89 ft: about 2 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 tee-beam bridge.

Built196561 years old
Length177.8 ft54.2 m
Daily traffic2,810counted 2016
Last inspectedAugust 2024every 24 months

Location

StateCalifornia
CountyStanislaus
Location0.7 Mi E Of I-5
CarriesHoward Road
CrossesCalifornia Aqueduct
Coordinates37.53643, -121.25791

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length177.8 ft (54.2 m)
Max Span88.9 ft (27.1 m)
Deck Width34.1 ft (10.4 m)
Deck Area563.7 sq m
Main Spans2
Year Built1965

Traffic

Avg Daily Traffic2,810 (2016)
Truck Traffic20%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerOther State Agencies
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number38C0117

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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