Structure 50C0021R · Kern County, CA

Manor Street NB over Kern River

Carries Manor Street NB over Kern River, 0.2 Mi S Roberts Lane.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure7/9 · Good
Substructure7/9 · Good
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT616 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 7/9

616 ft end to end, longest span 50 ft: about 1.7 football fields. 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.

Built1957rebuilt 2021
Length616.1 ft187.8 m
Daily traffic10,750counted 2010
Last inspectedDecember 2024every 24 months

Location

StateCalifornia
CountyKern
Location0.2 Mi S Roberts Lane
CarriesManor Street NB
CrossesKern River
Coordinates35.40704, -119.00917

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length616.1 ft (187.8 m)
Max Span49.9 ft (15.2 m)
Deck Width40.0 ft (12.2 m)
Deck Area2291.2 sq m
Main Spans13
Year Built1957 (reconstructed 2021)

Traffic

Avg Daily Traffic10,750 (2010)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionDecember 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number50C0021R

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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