Structure 50C0174 · Kern County, CA

Mt Vernon AVE over Up Rr Bnsf Ry Edison HWY

Carries Mt Vernon AVE over Up Rr Bnsf Ry Edison HWY, 0.3 Mi N California St..

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
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT697 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 7/9

697 ft end to end, longest span 107 ft: about 1.9 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 multi-beam bridge.

Built196066 years old
Length696.9 ft212.4 m
Daily traffic31,500counted 2015
Last inspectedDecember 2023every 24 months

Location

StateCalifornia
CountyKern
Location0.3 Mi N California St.
CarriesMt Vernon AVE
CrossesUp Rr Bnsf Ry Edison HWY
Coordinates35.37046, -118.96743

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length696.9 ft (212.4 m)
Max Span107.0 ft (32.6 m)
Deck Width70.5 ft (21.5 m)
Deck Area4566.6 sq m
Main Spans2
Year Built1960

Traffic

Avg Daily Traffic31,500 (2015)
Truck Traffic1%
Lanes On Bridge4
Lanes Under Bridge8

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number50C0174

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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