US Bridges

Monroe ST over Interstate 10

Good

Riverside County, California · 08-RIV-010-R54.74-IND · Structure no. 56 0611

Built
1972
53 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
249 ft
2 main spans
Daily traffic
11,660
2014 count
Owner
State
State Highway Agency

About this bridge

Monroe ST over Interstate 10 is a prestressed concrete continuous box beam or girders - multiple carrying Monroe ST over Interstate 10 in Riverside County, California. It was built in 1972, so it is 53 years old, younger 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 11,660 vehicles a day, roughly 14% of them trucks, projected to reach 23,464 by 2040. The structure is 249 ft (75.9 m) long and 47 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesMonroe ST
CrossesInterstate 10
Location08-RIV-010-R54.74-IND
RouteCounty Highway 0Z858
Coordinates33.73979, -116.23399
Functional classUrban Minor Arterial

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.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating47.5 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length249 ft (75.9 m)
Longest span128 ft (39 m)
Deck width47 ft (14.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,660 (2014)
Projected traffic23,464 by 2040
Trucks14%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 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 Monroe ST over Interstate 10 built?

It was built in 1972, making it 53 years old in 2025.

What condition is Monroe ST over Interstate 10 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 October 2023.

How much traffic does Monroe ST over Interstate 10 carry?

About 11,660 vehicles per day (2014 count), of which roughly 14% are trucks.

How long is Monroe ST over Interstate 10?

The structure is 249 ft (75.9 m) long with a longest span of 128 ft (39 m) and a deck 47 ft wide.

Who owns Monroe ST over Interstate 10?

It is owned by the State Highway Agency.