US Bridges

Magnolia Avenue over Interstate 15

Fair

Riverside County, California · 08-RIV-015-40.35-COR · Structure no. 56 0497

Built
1975
50 years old, rebuilt 2005
Condition
Fair
inspected February 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
279 ft
2 main spans
Daily traffic
175,283
2023 count
Owner
State
State Highway Agency

About this bridge

Magnolia Avenue over Interstate 15 is a prestressed concrete continuous box beam or girders - multiple carrying Magnolia Avenue over Interstate 15 in Riverside County, California. It was built in 1975 and reconstructed in 2005, so it is 50 years old, younger 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 175,283 vehicles a day, roughly 1% of them trucks, projected to reach 188,731 by 2042. The structure is 279 ft (85 m) long and 128 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesMagnolia Avenue
CrossesInterstate 15
Location08-RIV-015-40.35-COR
RouteCity Street 0R100
Coordinates33.86549, -117.54256
Functional classUrban Minor Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2024
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment9: Superior to present desirable criteria
Operating rating62.8 US tons
Inventory rating41.4 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length279 ft (85 m)
Longest span156 ft (47.7 m)
Deck width128 ft (39 m)
Roadway width116 ft (35.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic175,283 (2023)
Projected traffic188,731 by 2042
Trucks1%
Lanes on structure9
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed6.2 mi (10 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 Magnolia Avenue over Interstate 15 built?

It was built in 1975, making it 50 years old in 2025. It was reconstructed in 2005.

What condition is Magnolia Avenue over Interstate 15 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 February 2024.

How much traffic does Magnolia Avenue over Interstate 15 carry?

About 175,283 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Magnolia Avenue over Interstate 15?

The structure is 279 ft (85 m) long with a longest span of 156 ft (47.7 m) and a deck 128 ft wide.

Who owns Magnolia Avenue over Interstate 15?

It is owned by the State Highway Agency.