Structure 39 0190 · Merced County, CA

SR 33 (jensen Ave) over California Aqueduct

Carries SR 33 (jensen Ave) over California Aqueduct, 10-mer-033-r14.41.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
Channelnot part of overall9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT243 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 5/9 · sets the rating

243 ft end to end, longest span 59 ft: about 3 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.

Built196561 years old
Length243.1 ft74.1 m
Daily traffic8,200counted 2009
Last inspectedFebruary 2025every 24 months

Location

StateCalifornia
CountyMerced
Location10-mer-033-r14.41
CarriesSR 33 (jensen Ave)
CrossesCalifornia Aqueduct
Coordinates37.07393, -121.01618

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length243.1 ft (74.1 m)
Max Span59.4 ft (18.1 m)
Deck Width34.1 ft (10.4 m)
Deck Area770.6 sq m
Main Spans4
Year Built1965

Traffic

Avg Daily Traffic8,200 (2009)
Truck Traffic30%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2025
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number39 0190

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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