US Bridges

Interstate 40 over Arbol Ditch

Fair

San Bernardino County, California · 08-SBD-040-R129.78 · Structure no. 54 0204L

Built
1971
54 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
104 ft
4 main spans
Daily traffic
13,600
2023 count
Owner
State
State Highway Agency

About this bridge

Interstate 40 over Arbol Ditch is a concrete continuous slab carrying Interstate 40 over Arbol Ditch in San Bernardino 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 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 13,600 vehicles a day, roughly 40% of them trucks, projected to reach 19,046 by 2043. The structure is 104 ft (31.7 m) long and 53 ft wide. If it were closed, the detour would be 12.4 mi (20 km).

Location

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CarriesInterstate 40
CrossesArbol Ditch
Location08-SBD-040-R129.78
RouteInterstate 40
CountySan Bernardino County
StateCalifornia
Coordinates34.87719, -114.80567
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110 US tons
Inventory rating67.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length104 ft (31.7 m)
Longest span30 ft (9.1 m)
Deck width53 ft (16.2 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,600 (2023)
Projected traffic19,046 by 2043
Trucks40%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed12.4 mi (20 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Interstate 40 over Arbol Ditch built?

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

What condition is Interstate 40 over Arbol Ditch 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 2023.

How much traffic does Interstate 40 over Arbol Ditch carry?

About 13,600 vehicles per day (2023 count), of which roughly 40% are trucks.

How long is Interstate 40 over Arbol Ditch?

The structure is 104 ft (31.7 m) long with a longest span of 30 ft (9.1 m) and a deck 53 ft wide.

Who owns Interstate 40 over Arbol Ditch?

It is owned by the State Highway Agency.