US Bridges

Interstate 40 over Ardis Ditch

Poor

San Bernardino County, California · 08-SBD-040-R118.66 · Structure no. 54 0201L

Built
1971
54 years old
Condition
Poor
inspected March 2023
Type
Slab
Concrete Continuous
Length
81 ft
3 main spans
Daily traffic
7,500
2019 count
Owner
State
State Highway Agency

About this bridge

Interstate 40 over Ardis Ditch is a concrete continuous slab carrying Interstate 40 over Ardis 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 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 7,500 vehicles a day, roughly 42% of them trucks, projected to reach 12,046 by 2041. The structure is 81 ft (24.7 m) long and 41 ft wide. If it were closed, the detour would be 12.4 mi (20 km).

CarriesInterstate 40
CrossesArdis Ditch
Location08-SBD-040-R118.66
RouteInterstate 40
Coordinates34.83918, -114.99229
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
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.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110 US tons
Inventory rating69.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length81 ft (24.7 m)
Longest span32 ft (9.8 m)
Deck width41 ft (12.5 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,500 (2019)
Projected traffic12,046 by 2041
Trucks42%
Lanes on structure2
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$519,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Interstate 40 over Ardis Ditch built?

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

What condition is Interstate 40 over Ardis Ditch 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 March 2023.

How much traffic does Interstate 40 over Ardis Ditch carry?

About 7,500 vehicles per day (2019 count), of which roughly 42% are trucks.

How long is Interstate 40 over Ardis Ditch?

The structure is 81 ft (24.7 m) long with a longest span of 32 ft (9.8 m) and a deck 41 ft wide.

Who owns Interstate 40 over Ardis Ditch?

It is owned by the State Highway Agency.