Structure 50 0247 · Kern County, CA

Panama Lane over State Route 99

Carries Panama Lane over State Route 99, 06-ker-099-19.54.

Overall conditionPoor

Set by its lowest-rated component: Deck at 4 of 9.

How ratings work
Decksets the rating4/9 · Poor
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT289 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 7/9Substructure 7/9

289 ft end to end, longest span 96 ft: about 4 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.

Built1962rebuilt 1997
Length289.0 ft88.1 m
Daily traffic44,034counted 2013
Last inspectedDecember 2023every 24 months

Location

StateCalifornia
CountyKern
Location06-ker-099-19.54
CarriesPanama Lane
CrossesState Route 99
Coordinates35.29575, -119.03091

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length289.0 ft (88.1 m)
Max Span96.1 ft (29.3 m)
Deck Width101.7 ft (31 m)
Deck Area2731.1 sq m
Main Spans4
Year Built1962 (reconstructed 1997)

Traffic

Avg Daily Traffic44,034 (2013)
Truck Traffic20%
Lanes On Bridge6
Lanes Under Bridge8

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number50 0247

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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