US Bridges

County Line RD over Friant-Kern Canal

Good

Kern County, California · 0.5 MI East of Zachary Av · Structure no. 50C0091

Built
1971
54 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
86 ft
1 main span
Daily traffic
3,000
2005 count
Owner
County
County Highway Agency

About this bridge

County Line RD over Friant-Kern Canal is a prestressed concrete stringer/multi-beam or girder carrying County Line RD over Friant-Kern Canal 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 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 3,000 vehicles a day, roughly 10% of them trucks, projected to reach 4,289 by 2046. The structure is 86 ft (26.1 m) long and 41 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesCounty Line RD
CrossesFriant-Kern Canal
Location0.5 MI East of Zachary Av
RouteCounty Highway 0
Coordinates35.79052, -119.17834
Functional classRural Minor Collector

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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating30 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length86 ft (26.1 m)
Longest span83 ft (25.3 m)
Deck width41 ft (12.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2005)
Projected traffic4,289 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 County Line RD over Friant-Kern Canal built?

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

What condition is County Line RD 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 March 2024.

How much traffic does County Line RD over Friant-Kern Canal carry?

About 3,000 vehicles per day (2005 count), of which roughly 10% are trucks.

How long is County Line RD over Friant-Kern Canal?

The structure is 86 ft (26.1 m) long with a longest span of 83 ft (25.3 m) and a deck 41 ft wide.

Who owns County Line RD over Friant-Kern Canal?

It is owned by the County Highway Agency.