US Bridges

Interstate 5 SB over SR 99 Truck Ramp SB

Good

Kern County, California · 06-KER-005-R15.51L · Structure no. 50 0240L

Built
1972
53 years old
Condition
Good
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
333 ft
3 main spans
Daily traffic
34,500
2009 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 SB over SR 99 Truck Ramp SB is a prestressed concrete continuous box beam or girders - multiple carrying Interstate 5 SB over SR 99 Truck Ramp SB 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 34,500 vehicles a day, roughly 24% of them trucks, projected to reach 33,862 by 2043. The structure is 333 ft (101.5 m) long and 42 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

CarriesInterstate 5 SB
CrossesSR 99 Truck Ramp SB
Location06-KER-005-R15.51L
RouteInterstate 5
Coordinates35.01394, -118.95496
Functional classRural Principal Arterial - Interstate

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.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60.7 US tons
Inventory rating44 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length333 ft (101.5 m)
Longest span145 ft (44.2 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,500 (2009)
Projected traffic33,862 by 2043
Trucks24%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate 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 Interstate 5 SB over SR 99 Truck Ramp SB built?

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

What condition is Interstate 5 SB over SR 99 Truck Ramp SB 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 May 2023.

How much traffic does Interstate 5 SB over SR 99 Truck Ramp SB carry?

About 34,500 vehicles per day (2009 count), of which roughly 24% are trucks.

How long is Interstate 5 SB over SR 99 Truck Ramp SB?

The structure is 333 ft (101.5 m) long with a longest span of 145 ft (44.2 m) and a deck 42 ft wide.

Who owns Interstate 5 SB over SR 99 Truck Ramp SB?

It is owned by the State Highway Agency.