US Bridges

Frontage Road over Calloway Drive

Good

Kern County, California · 0.5 MI South of SR58 · Structure no. 50C0386

Built
1990
35 years old
Condition
Good
inspected November 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
144 ft
2 main spans
Daily traffic
500
2012 count
Owner
County
County Highway Agency

About this bridge

Frontage Road over Calloway Drive is a prestressed concrete continuous box beam or girders - multiple carrying Frontage Road over Calloway Drive in Kern County, California. It was built in 1990, so it is 35 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 500 vehicles a day, roughly 2% of them trucks, projected to reach 578 by 2045. The structure is 144 ft (44 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesFrontage Road
CrossesCalloway Drive
Location0.5 MI South of SR58
RouteCounty Highway 0
CountyKern County
StateCalifornia
Coordinates35.37653, -119.11072
Functional classUrban Local

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 inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length144 ft (44 m)
Longest span72 ft (22 m)
Deck width42 ft (12.8 m)
Roadway width36 ft (10.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2012)
Projected traffic578 by 2045
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

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 Frontage Road over Calloway Drive built?

It was built in 1990, making it 35 years old in 2025.

What condition is Frontage Road over Calloway Drive 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 November 2023.

How much traffic does Frontage Road over Calloway Drive carry?

About 500 vehicles per day (2012 count), of which roughly 2% are trucks.

How long is Frontage Road over Calloway Drive?

The structure is 144 ft (44 m) long with a longest span of 72 ft (22 m) and a deck 42 ft wide.

Who owns Frontage Road over Calloway Drive?

It is owned by the County Highway Agency.