US Bridges

Westbound I-40 over Kelbaker Road

Fair

San Bernardino County, California · 08-SBD-040-R78.17 · Structure no. 54 0885L

Built
1973
52 years old
Condition
Fair
inspected January 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
124 ft
1 main span
Daily traffic
8,500
2018 count
Owner
State
State Highway Agency

About this bridge

Westbound I-40 over Kelbaker Road is a prestressed concrete box beam or girders - multiple carrying Westbound I-40 over Kelbaker Road in San Bernardino County, California. It was built in 1973, so it is 52 years old, younger 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 5 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 8,500 vehicles a day, roughly 46% of them trucks, projected to reach 12,235 by 2047. The structure is 124 ft (37.8 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesWestbound I-40
CrossesKelbaker Road
Location08-SBD-040-R78.17
RouteInterstate 40
CountySan Bernardino County
StateCalifornia
Coordinates34.72129, -115.67864
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.4 US tons
Inventory rating34 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length124 ft (37.8 m)
Longest span124 ft (37.8 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,500 (2018)
Projected traffic12,235 by 2047
Trucks46%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 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 Westbound I-40 over Kelbaker Road built?

It was built in 1973, making it 52 years old in 2025.

What condition is Westbound I-40 over Kelbaker Road 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 January 2025.

How much traffic does Westbound I-40 over Kelbaker Road carry?

About 8,500 vehicles per day (2018 count), of which roughly 46% are trucks.

How long is Westbound I-40 over Kelbaker Road?

The structure is 124 ft (37.8 m) long with a longest span of 124 ft (37.8 m) and a deck 42 ft wide.

Who owns Westbound I-40 over Kelbaker Road?

It is owned by the State Highway Agency.