US Bridges

State Route 58 over BNSF RY & AMTRAK

Fair

Kern County, California · 0.2 MI W of Enger ST · Structure no. 50C0398

Built
1971
54 years old
Condition
Fair
inspected November 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
179 ft
3 main spans
Daily traffic
32,500
2009 count
Owner
County
County Highway Agency

About this bridge

State Route 58 over BNSF RY & AMTRAK is a prestressed concrete continuous box beam or girders - multiple carrying State Route 58 over BNSF RY & AMTRAK in Kern County, California. It was built in 1971, so it is 54 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 32,500 vehicles a day, roughly 27% of them trucks, projected to reach 34,680 by 2043. The structure is 179 ft (54.6 m) long and 99 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesState Route 58
CrossesBNSF RY & AMTRAK
Location0.2 MI W of Enger ST
RouteCounty Highway 0
CountyKern County
StateCalifornia
Coordinates35.38337, -119.12819
Functional classUrban Other Principal 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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.7 US tons
Inventory rating36 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length179 ft (54.6 m)
Longest span75 ft (22.9 m)
Deck width99 ft (30.1 m)
Roadway width72 ft (22 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32,500 (2009)
Projected traffic34,680 by 2043
Trucks27%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 State Route 58 over BNSF RY & AMTRAK built?

It was built in 1971, making it 54 years old in 2025.

What condition is State Route 58 over BNSF RY & AMTRAK 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 November 2023.

How much traffic does State Route 58 over BNSF RY & AMTRAK carry?

About 32,500 vehicles per day (2009 count), of which roughly 27% are trucks.

How long is State Route 58 over BNSF RY & AMTRAK?

The structure is 179 ft (54.6 m) long with a longest span of 75 ft (22.9 m) and a deck 99 ft wide.

Who owns State Route 58 over BNSF RY & AMTRAK?

It is owned by the County Highway Agency.