US Bridges

Interstate 10 EB over Dillon Road

Fair

Riverside County, California · 08-RIV-010-R58.89-COA · Structure no. 56 0617R

Built
1972
53 years old
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
214 ft
2 main spans
Daily traffic
11,250
2016 count
Owner
State
State Highway Agency

About this bridge

Interstate 10 EB over Dillon Road is a concrete continuous box beam or girders - multiple carrying Interstate 10 EB over Dillon Road in Riverside County, California. It was built in 1972, so it is 53 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 11,250 vehicles a day, roughly 40% of them trucks, projected to reach 23,158 by 2040. The structure is 214 ft (65.2 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesInterstate 10 EB
CrossesDillon Road
Location08-RIV-010-R58.89-COA
RouteInterstate 10
CountyRiverside County
StateCalifornia
Coordinates33.71489, -116.17331
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.8 US tons
Inventory rating63.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length214 ft (65.2 m)
Longest span107 ft (32.6 m)
Deck width41 ft (12.5 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,250 (2016)
Projected traffic23,158 by 2040
Trucks40%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 Interstate 10 EB over Dillon Road built?

It was built in 1972, making it 53 years old in 2025.

What condition is Interstate 10 EB over Dillon 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 October 2023.

How much traffic does Interstate 10 EB over Dillon Road carry?

About 11,250 vehicles per day (2016 count), of which roughly 40% are trucks.

How long is Interstate 10 EB over Dillon Road?

The structure is 214 ft (65.2 m) long with a longest span of 107 ft (32.6 m) and a deck 41 ft wide.

Who owns Interstate 10 EB over Dillon Road?

It is owned by the State Highway Agency.