US Bridges

Interstate 10 over San Gorgonio Wash

Good

Riverside County, California · 08-RIV-010-R16.14-BAN · Structure no. 56 0003

Built
1940
85 years old, rebuilt 1970
Condition
Good
inspected November 2023
Type
Slab
Concrete Continuous
Length
276 ft
10 main spans
Daily traffic
111,000
2018 count
Owner
State
State Highway Agency

About this bridge

Interstate 10 over San Gorgonio Wash is a concrete continuous slab carrying Interstate 10 over San Gorgonio Wash in Riverside County, California. It was built in 1940 and reconstructed in 1970, so it is 85 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 111,000 vehicles a day, roughly 18% of them trucks, projected to reach 155,000 by 2040. The structure is 276 ft (84 m) long and 144 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesInterstate 10
CrossesSan Gorgonio Wash
Location08-RIV-010-R16.14-BAN
RouteInterstate 10
CountyRiverside County
StateCalifornia
Coordinates33.93135, -116.82883
Functional classUrban 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 protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.1 US tons
Inventory rating20.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans10
Design loadH 20
Structure length276 ft (84 m)
Longest span33 ft (10.1 m)
Deck width144 ft (43.9 m)
Roadway width144 ft (43.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic111,000 (2018)
Projected traffic155,000 by 2040
Trucks18%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Interstate 10 over San Gorgonio Wash built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1970.

What condition is Interstate 10 over San Gorgonio Wash 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 November 2023.

How much traffic does Interstate 10 over San Gorgonio Wash carry?

About 111,000 vehicles per day (2018 count), of which roughly 18% are trucks.

How long is Interstate 10 over San Gorgonio Wash?

The structure is 276 ft (84 m) long with a longest span of 33 ft (10.1 m) and a deck 144 ft wide.

Who owns Interstate 10 over San Gorgonio Wash?

It is owned by the State Highway Agency.