US Bridges

State Route 58 EB over Cottonwood Road

Good

Kern County, California · 06-KER-058-R55.40 · Structure no. 50 0401R

Built
1974
51 years old, rebuilt 2015
Condition
Good
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
155 ft
1 main span
Daily traffic
42,000
2019 count
Owner
State
State Highway Agency

About this bridge

State Route 58 EB over Cottonwood Road is a prestressed concrete box beam or girders - multiple carrying State Route 58 EB over Cottonwood Road in Kern County, California. It was built in 1974 and reconstructed in 2015, so it is 51 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 42,000 vehicles a day, roughly 25% of them trucks, projected to reach 58,306 by 2045. The structure is 155 ft (47.3 m) long and 59 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesState Route 58 EB
CrossesCottonwood Road
Location06-KER-058-R55.40
RouteState Highway 58
Coordinates35.35221, -118.98555
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.2 US tons
Inventory rating27.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length155 ft (47.3 m)
Longest span155 ft (47.3 m)
Deck width59 ft (17.9 m)
Roadway width55 ft (16.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42,000 (2019)
Projected traffic58,306 by 2045
Trucks25%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
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 State Route 58 EB over Cottonwood Road built?

It was built in 1974, making it 51 years old in 2025. It was reconstructed in 2015.

What condition is State Route 58 EB over Cottonwood Road in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does State Route 58 EB over Cottonwood Road carry?

About 42,000 vehicles per day (2019 count), of which roughly 25% are trucks.

How long is State Route 58 EB over Cottonwood Road?

The structure is 155 ft (47.3 m) long with a longest span of 155 ft (47.3 m) and a deck 59 ft wide.

Who owns State Route 58 EB over Cottonwood Road?

It is owned by the State Highway Agency.