Structure 50 0363 · Kern County, CA

Comanche Drive over SR 58

Carries Comanche Drive over SR 58, 06-ker-058-r63.58.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT224 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

224 ft end to end, longest span 112 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 box-beam bridge.

Built197056 years old
Length224.1 ft68.3 m
Daily traffic4,000counted 2006
Last inspectedSeptember 2023every 24 months

Location

StateCalifornia
CountyKern
Location06-ker-058-r63.58
CarriesComanche Drive
CrossesSR 58
Coordinates35.33864, -118.84324

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length224.1 ft (68.3 m)
Max Span111.9 ft (34.1 m)
Deck Width34.1 ft (10.4 m)
Deck Area710.3 sq m
Main Spans2
Year Built1970

Traffic

Avg Daily Traffic4,000 (2006)
Truck Traffic15%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number50 0363

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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