US Bridges

Interstate 10 WB over Adair Ditch

Good

Riverside County, California · 08-RIV-010-R100.38 · Structure no. 56 0099L

Built
1967
58 years old
Condition
Good
inspected October 2024
Type
Slab
Concrete Continuous
Length
52 ft
2 main spans
Daily traffic
11,500
2015 count
Owner
State
State Highway Agency

About this bridge

Interstate 10 WB over Adair Ditch is a concrete continuous slab carrying Interstate 10 WB over Adair Ditch in Riverside County, California. It was built in 1967, so it is 58 years old, older 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 11,500 vehicles a day, roughly 40% of them trucks, projected to reach 19,732 by 2042. The structure is 52 ft (15.8 m) long and 41 ft wide.

CarriesInterstate 10 WB
CrossesAdair Ditch
Location08-RIV-010-R100.38
RouteInterstate 10
Coordinates33.69658, -115.48002
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.
Channel and channel protection3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 rating32.5 US tons
Inventory rating25.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length52 ft (15.8 m)
Longest span26 ft (7.9 m)
Deck width41 ft (12.5 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,500 (2015)
Projected traffic19,732 by 2042
Trucks40%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 10 WB over Adair Ditch built?

It was built in 1967, making it 58 years old in 2025.

What condition is Interstate 10 WB over Adair Ditch 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 October 2024.

How much traffic does Interstate 10 WB over Adair Ditch carry?

About 11,500 vehicles per day (2015 count), of which roughly 40% are trucks.

How long is Interstate 10 WB over Adair Ditch?

The structure is 52 ft (15.8 m) long with a longest span of 26 ft (7.9 m) and a deck 41 ft wide.

Who owns Interstate 10 WB over Adair Ditch?

It is owned by the State Highway Agency.