US Bridges

Main ST over Interstate 10

Fair

Riverside County, California · 08-RIV-010-R19.40 · Structure no. 56 0456

Built
1964
61 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
288 ft
4 main spans
Daily traffic
1,800
2014 count
Owner
State
State Highway Agency

About this bridge

Main ST over Interstate 10 is a concrete continuous box beam or girders - multiple carrying Main ST over Interstate 10 in Riverside County, California. It was built in 1964, so it is 61 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 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 1,800 vehicles a day, roughly 10% of them trucks, projected to reach 2,600 by 2044. The structure is 288 ft (87.8 m) long and 43 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesMain ST
CrossesInterstate 10
Location08-RIV-010-R19.40
RouteCounty Highway 0
CountyRiverside County
StateCalifornia
Coordinates33.91911, -116.77682
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.8 US tons
Inventory rating34.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length288 ft (87.8 m)
Longest span101 ft (30.8 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2014)
Projected traffic2,600 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

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 Main ST over Interstate 10 built?

It was built in 1964, making it 61 years old in 2025.

What condition is Main ST over Interstate 10 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 July 2023.

How much traffic does Main ST over Interstate 10 carry?

About 1,800 vehicles per day (2014 count), of which roughly 10% are trucks.

How long is Main ST over Interstate 10?

The structure is 288 ft (87.8 m) long with a longest span of 101 ft (30.8 m) and a deck 43 ft wide.

Who owns Main ST over Interstate 10?

It is owned by the State Highway Agency.