US Bridges

Dillon Road over Whitewater River

PoorPosted for load

Riverside County, California · 0.12 Mi. Se/O SR 86S · Structure no. 56C0318

Built
1950
75 years old, rebuilt 1969
Condition
Poor
inspected November 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
279 ft
1 main span
Daily traffic
8,700
2014 count
Owner
City
City or Municipal Highway Agency

About this bridge

Dillon Road over Whitewater River is a prestressed concrete box beam or girders - multiple carrying Dillon Road over Whitewater River in Riverside County, California. It was built in 1950 and reconstructed in 1969, so it is 75 years old, older 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. Its operating status is: posted for load restriction.

It carries about 8,700 vehicles a day, roughly 5% of them trucks, projected to reach 20,814 by 2046. The structure is 279 ft (85 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesDillon Road
CrossesWhitewater River
Location0.12 Mi. Se/O SR 86S
RouteCounty Highway 0
Coordinates33.70634, -116.18309
Functional classUrban Other Principal Arterial

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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating15 US tons
Inventory rating8.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1 (+10 approach)
Design loadHS 20
Structure length279 ft (85 m)
Longest span81 ft (24.7 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,700 (2014)
Projected traffic20,814 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$3.3 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Dillon Road over Whitewater River built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1969.

What condition is Dillon Road over Whitewater River 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 November 2024.

How much traffic does Dillon Road over Whitewater River carry?

About 8,700 vehicles per day (2014 count), of which roughly 5% are trucks.

How long is Dillon Road over Whitewater River?

The structure is 279 ft (85 m) long with a longest span of 81 ft (24.7 m) and a deck 34 ft wide.

Who owns Dillon Road over Whitewater River?

It is owned by the City or Municipal Highway Agency.