Structure 50C0258 · Kern County, CA

Zerker RD over Friant-kern Canal

Carries Zerker RD over Friant-kern Canal, 2.2 Mi N 7th Standard RD.

Overall conditionGood

Set by its lowest-rated component: Deck at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructure8/9 · Very Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT70 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 8/9

70 ft end to end, longest span 34 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 tee-beam bridge.

Built1950rebuilt 1989
Length69.9 ft21.3 m
Daily traffic1,650counted 2005
Last inspectedNovember 2024every 24 months

Location

StateCalifornia
CountyKern
Location2.2 Mi N 7th Standard RD
CarriesZerker RD
CrossesFriant-kern Canal
Coordinates35.47403, -119.15327

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length69.9 ft (21.3 m)
Max Span34.1 ft (10.4 m)
Deck Width43.6 ft (13.3 m)
Deck Area283.3 sq m
Main Spans2
Year Built1950 (reconstructed 1989)

Traffic

Avg Daily Traffic1,650 (2005)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number50C0258

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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