US Bridges

Interstate 5 SB over Kern River Flood Canal

Poor

Kern County, California · 06-KER-005-71.64 · Structure no. 50 0315L

Built
1967
58 years old
Condition
Poor
inspected October 2024
Type
Slab
Concrete Continuous
Length
213 ft
8 main spans
Daily traffic
16,000
2019 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 SB over Kern River Flood Canal is a concrete continuous slab carrying Interstate 5 SB over Kern River Flood Canal in Kern County, California. It was built in 1967, so it is 58 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 16,000 vehicles a day, roughly 31% of them trucks, projected to reach 27,000 by 2042. The structure is 213 ft (64.9 m) long and 42 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesInterstate 5 SB
CrossesKern River Flood Canal
Location06-KER-005-71.64
RouteInterstate 5
Coordinates35.59966, -119.63973
Functional classRural Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.8 US tons
Inventory rating43.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20 + Mod
Structure length213 ft (64.9 m)
Longest span28 ft (8.5 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,000 (2019)
Projected traffic27,000 by 2042
Trucks31%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.4 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Interstate 5 SB over Kern River Flood Canal built?

It was built in 1967, making it 58 years old in 2025.

What condition is Interstate 5 SB over Kern River Flood Canal in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.

How much traffic does Interstate 5 SB over Kern River Flood Canal carry?

About 16,000 vehicles per day (2019 count), of which roughly 31% are trucks.

How long is Interstate 5 SB over Kern River Flood Canal?

The structure is 213 ft (64.9 m) long with a longest span of 28 ft (8.5 m) and a deck 42 ft wide.

Who owns Interstate 5 SB over Kern River Flood Canal?

It is owned by the State Highway Agency.