US Bridges

State Route 86S NB over Dillon Road

Fair

Riverside County, California · 08-RIV-086-R22.16-COA · Structure no. 56 0760R

Built
1993
32 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
181 ft
2 main spans
Daily traffic
153,000
2020 count
Owner
State
State Highway Agency

About this bridge

State Route 86S NB over Dillon Road is a prestressed concrete continuous box beam or girders - single or spread carrying State Route 86S NB over Dillon Road in Riverside County, California. It was built in 1993, so it is 32 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 153,000 vehicles a day, roughly 21% of them trucks, projected to reach 177,936 by 2045. The structure is 181 ft (55.2 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesState Route 86S NB
CrossesDillon Road
Location08-RIV-086-R22.16-COA
RouteState Highway 86
Coordinates33.7079, -116.18089
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionApril 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 rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length181 ft (55.2 m)
Longest span91 ft (27.6 m)
Deck width42 ft (12.9 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic153,000 (2020)
Projected traffic177,936 by 2045
Trucks21%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 State Route 86S NB over Dillon Road built?

It was built in 1993, making it 32 years old in 2025.

What condition is State Route 86S NB 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 April 2023.

How much traffic does State Route 86S NB over Dillon Road carry?

About 153,000 vehicles per day (2020 count), of which roughly 21% are trucks.

How long is State Route 86S NB over Dillon Road?

The structure is 181 ft (55.2 m) long with a longest span of 91 ft (27.6 m) and a deck 42 ft wide.

Who owns State Route 86S NB over Dillon Road?

It is owned by the State Highway Agency.