Structure 39C0295 · Merced County, CA

Volta Road over Delta-mendota Canal

Carries Volta Road over Delta-mendota Canal, 0.4 Mi S Pioneer RD.

Overall conditionFair

Set by its lowest-rated component: Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT106 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

106 ft end to end, longest span 27 ft. 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 multi-beam bridge.

Built194581 years old
Length106.0 ft32.3 m
Daily traffic158counted 2008
Last inspectedFebruary 2025every 24 months

Location

StateCalifornia
CountyMerced
Location0.4 Mi S Pioneer RD
CarriesVolta Road
CrossesDelta-mendota Canal
Coordinates37.03739, -120.92707

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length106.0 ft (32.3 m)
Max Span26.9 ft (8.2 m)
Deck Width21.0 ft (6.4 m)
Deck Area206.7 sq m
Main Spans4
Year Built1945

Traffic

Avg Daily Traffic158 (2008)
Truck Traffic42%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2025
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number39C0295

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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