US Bridges

State Route 91 over Magnolia Ave

Fair

Riverside County, California · 08-RIV-091-11.10-RIV · Structure no. 56 0426

Built
1959
66 years old, rebuilt 1973
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
345 ft
3 main spans
Daily traffic
203,000
2019 count
Owner
State
State Highway Agency

About this bridge

State Route 91 over Magnolia Ave is a prestressed concrete stringer/multi-beam or girder carrying State Route 91 over Magnolia Ave in Riverside County, California. It was built in 1959 and reconstructed in 1973, so it is 66 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 203,000 vehicles a day, roughly 5% of them trucks, projected to reach 242,578 by 2040. The structure is 345 ft (105.2 m) long and 156 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesState Route 91
CrossesMagnolia Ave
Location08-RIV-091-11.10-RIV
RouteState Highway 91
Coordinates33.89698, -117.48837
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating70 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 20
Structure length345 ft (105.2 m)
Longest span82 ft (25 m)
Deck width156 ft (47.7 m)
Roadway width150 ft (45.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic203,000 (2019)
Projected traffic242,578 by 2040
Trucks5%
Lanes on structure10
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was State Route 91 over Magnolia Ave built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1973.

What condition is State Route 91 over Magnolia Ave 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 State Route 91 over Magnolia Ave carry?

About 203,000 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is State Route 91 over Magnolia Ave?

The structure is 345 ft (105.2 m) long with a longest span of 82 ft (25 m) and a deck 156 ft wide.

Who owns State Route 91 over Magnolia Ave?

It is owned by the State Highway Agency.