US Bridges

Allen Road over State Route 58

Fair

Kern County, California · 06-KER-058-R45.37-BKD · Structure no. 50 0550

Built
2013
12 years old
Condition
Fair
inspected December 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
167 ft
2 main spans
Daily traffic
1,000
2016 count
Owner
State
State Highway Agency

About this bridge

Allen Road over State Route 58 is a concrete continuous box beam or girders - multiple carrying Allen Road over State Route 58 in Kern County, California. It was built in 2013, so it is 12 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,000 vehicles a day, roughly 3% of them trucks, projected to reach 3,071 by 2045. The structure is 167 ft (50.9 m) long and 124 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesAllen Road
CrossesState Route 58
Location06-KER-058-R45.37-BKD
RouteCity Street 0
CountyKern County
StateCalifornia
Coordinates35.36139, -119.14528
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length167 ft (50.9 m)
Longest span93 ft (28.3 m)
Deck width124 ft (37.9 m)
Roadway width113 ft (34.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2016)
Projected traffic3,071 by 2045
Trucks3%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Allen Road over State Route 58 built?

It was built in 2013, making it 12 years old in 2025.

What condition is Allen Road over State Route 58 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in December 2023.

How much traffic does Allen Road over State Route 58 carry?

About 1,000 vehicles per day (2016 count), of which roughly 3% are trucks.

How long is Allen Road over State Route 58?

The structure is 167 ft (50.9 m) long with a longest span of 93 ft (28.3 m) and a deck 124 ft wide.

Who owns Allen Road over State Route 58?

It is owned by the State Highway Agency.