US Bridges

Interstate 10 over South Garnet Wash

Fair

Riverside County, California · 08-RIV-010-32.70 · Structure no. 56 0400

Built
1954
71 years old, rebuilt 1967
Condition
Fair
inspected April 2023
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
85,000
2014 count
Owner
State
State Highway Agency

About this bridge

Interstate 10 over South Garnet Wash is a concrete continuous culvert carrying Interstate 10 over South Garnet Wash in Riverside County, California. It was built in 1954 and reconstructed in 1967, so it is 71 years old, older 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 6 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 85,000 vehicles a day, roughly 26% of them trucks, projected to reach 122,420 by 2040. The structure is 22 ft (6.7 m) long and 155 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesInterstate 10
CrossesSouth Garnet Wash
Location08-RIV-010-32.70
RouteInterstate 10
CountyRiverside County
StateCalifornia
Coordinates33.90467, -116.55475
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable 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 typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span11 ft (3.3 m)
Deck width155 ft (47.1 m)
Roadway width133 ft (40.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic85,000 (2014)
Projected traffic122,420 by 2040
Trucks26%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 10 over South Garnet Wash built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1967.

What condition is Interstate 10 over South Garnet 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 April 2023.

How much traffic does Interstate 10 over South Garnet Wash carry?

About 85,000 vehicles per day (2014 count), of which roughly 26% are trucks.

How long is Interstate 10 over South Garnet Wash?

The structure is 22 ft (6.7 m) long with a longest span of 11 ft (3.3 m) and a deck 155 ft wide.

Who owns Interstate 10 over South Garnet Wash?

It is owned by the State Highway Agency.