US Bridges

ST RTE 99 & UP RR over Friant-Kern Canal

Fair

Kern County, California · 06-KER-099-46.32 · Structure no. 50 0144

Built
1950
75 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete Continuous
Length
41 ft
3 main spans
Daily traffic
59,000
2020 count
Owner
State
State Highway Agency

About this bridge

ST RTE 99 & UP RR over Friant-Kern Canal is a concrete continuous culvert carrying ST RTE 99 & UP RR over Friant-Kern Canal in Kern County, California. It was built in 1950, so it is 75 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 59,000 vehicles a day, roughly 23% of them trucks, projected to reach 116,492 by 2042. The structure is 41 ft (12.5 m) long and 203 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

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CarriesST RTE 99 & UP RR
CrossesFriant-Kern Canal
Location06-KER-099-46.32
RouteState Highway 99
CountyKern County
StateCalifornia
Coordinates35.6309, -119.2159
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
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 geometry9: Superior to present desirable 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 Continuous
DeckNot applicable
Main spans3
Design loadUnknown
Structure length41 ft (12.5 m)
Longest span13 ft (4 m)
Deck width203 ft (62 m)
Roadway width112 ft (34 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic59,000 (2020)
Projected traffic116,492 by 2042
Trucks23%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and railroad
CrossesWaterway
Detour if closed11.8 mi (19 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 ST RTE 99 & UP RR over Friant-Kern Canal built?

It was built in 1950, making it 75 years old in 2025.

What condition is ST RTE 99 & UP RR over Friant-Kern Canal in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2024.

How much traffic does ST RTE 99 & UP RR over Friant-Kern Canal carry?

About 59,000 vehicles per day (2020 count), of which roughly 23% are trucks.

How long is ST RTE 99 & UP RR over Friant-Kern Canal?

The structure is 41 ft (12.5 m) long with a longest span of 13 ft (4 m) and a deck 203 ft wide.

Who owns ST RTE 99 & UP RR over Friant-Kern Canal?

It is owned by the State Highway Agency.