US Bridges

Driver Road over Friant-Kern Canal

Good

Kern County, California · At Whisler RD · Structure no. 50C0119

Built
1949
76 years old, rebuilt 1989
Condition
Good
inspected November 2024
Type
Tee Beam
Concrete
Length
112 ft
2 main spans
Daily traffic
600
2007 count
Owner
County
County Highway Agency

About this bridge

Driver Road over Friant-Kern Canal is a concrete tee beam carrying Driver Road over Friant-Kern Canal in Kern County, California. It was built in 1949 and reconstructed in 1989, so it is 76 years old, older 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 600 vehicles a day, roughly 10% of them trucks, projected to reach 1,087 by 2045. The structure is 112 ft (34.2 m) long and 44 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesDriver Road
CrossesFriant-Kern Canal
LocationAt Whisler RD
RouteCounty Highway 0
Coordinates35.64474, -119.20445
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating19.6 US tons
Inventory rating15 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 15
Structure length112 ft (34.2 m)
Longest span56 ft (17.1 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2007)
Projected traffic1,087 by 2045
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Driver Road over Friant-Kern Canal built?

It was built in 1949, making it 76 years old in 2025. It was reconstructed in 1989.

What condition is Driver Road over Friant-Kern Canal 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 2024.

How much traffic does Driver Road over Friant-Kern Canal carry?

About 600 vehicles per day (2007 count), of which roughly 10% are trucks.

How long is Driver Road over Friant-Kern Canal?

The structure is 112 ft (34.2 m) long with a longest span of 56 ft (17.1 m) and a deck 44 ft wide.

Who owns Driver Road over Friant-Kern Canal?

It is owned by the County Highway Agency.