US Bridges

East Frontage Road over Backus Road Drain No. 1

Good

Kern County, California · 09-KER-014-R9.30 · Structure no. 50 0453Y

Built
1972
53 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete
Length
30 ft
6 main spans
Daily traffic
50
2014 count
Owner
State
State Highway Agency

About this bridge

East Frontage Road over Backus Road Drain No. 1 is a concrete culvert carrying East Frontage Road over Backus Road Drain No. 1 in Kern County, California. It was built in 1972, so it is 53 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 50 vehicles a day, roughly 2% of them trucks, projected to reach 104 by 2041. The structure is 30 ft (9 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesEast Frontage Road
CrossesBackus Road Drain No. 1
Location09-KER-014-R9.30
RouteState Highway 14
Coordinates34.95492, -118.15978
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans6
Design loadUnknown
Structure length30 ft (9 m)
Longest span5 ft (1.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2014)
Projected traffic104 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 East Frontage Road over Backus Road Drain No. 1 built?

It was built in 1972, making it 53 years old in 2025.

What condition is East Frontage Road over Backus Road Drain No. 1 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 April 2023.

How much traffic does East Frontage Road over Backus Road Drain No. 1 carry?

About 50 vehicles per day (2014 count), of which roughly 2% are trucks.

How long is East Frontage Road over Backus Road Drain No. 1?

The structure is 30 ft (9 m) long with a longest span of 5 ft (1.5 m).

Who owns East Frontage Road over Backus Road Drain No. 1?

It is owned by the State Highway Agency.