US Bridges

Interstate 40 over Watson Wash

Fair

San Bernardino County, California · 08-SBD-040-R105.90 · Structure no. 54 1282R

Built
2004
21 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
744 ft
17 main spans
Daily traffic
7,500
2019 count
Owner
State
State Highway Agency

About this bridge

Interstate 40 over Watson Wash is a concrete continuous slab carrying Interstate 40 over Watson Wash in San Bernardino County, California. It was built in 2004, so it is 21 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 7,500 vehicles a day, roughly 46% of them trucks, projected to reach 11,046 by 2041. The structure is 744 ft (226.8 m) long and 41 ft wide. If it were closed, the detour would be 12.4 mi (20 km).

Location

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CarriesInterstate 40
CrossesWatson Wash
Location08-SBD-040-R105.90
RouteInterstate 40
CountySan Bernardino County
StateCalifornia
Coordinates34.80947, -115.21322
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.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans17
Design loadHS 20 + Mod
Structure length744 ft (226.8 m)
Longest span44 ft (13.4 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,500 (2019)
Projected traffic11,046 by 2041
Trucks46%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Interstate 40 over Watson Wash built?

It was built in 2004, making it 21 years old in 2025.

What condition is Interstate 40 over Watson Wash 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 Watson Wash carry?

About 7,500 vehicles per day (2019 count), of which roughly 46% are trucks.

How long is Interstate 40 over Watson Wash?

The structure is 744 ft (226.8 m) long with a longest span of 44 ft (13.4 m) and a deck 41 ft wide.

Who owns Interstate 40 over Watson Wash?

It is owned by the State Highway Agency.