US Bridges

State Route 91 EB over Magnolia Ave

Good

Orange County, California · 12-ORA-091-R3.85R-FUL · Structure no. 55 0296R

Built
1958
67 years old, rebuilt 2000
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
174 ft
3 main spans
Daily traffic
132,500
2016 count
Owner
State
State Highway Agency

About this bridge

State Route 91 EB over Magnolia Ave is a steel stringer/multi-beam or girder carrying State Route 91 EB over Magnolia Ave in Orange County, California. It was built in 1958 and reconstructed in 2000, so it is 67 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 132,500 vehicles a day, roughly 6% of them trucks, projected to reach 147,500 by 2042. The structure is 174 ft (53.1 m) long and 84 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesState Route 91 EB
CrossesMagnolia Ave
Location12-ORA-091-R3.85R-FUL
RouteState Highway 91
Coordinates33.85754, -117.9763
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating68.2 US tons
Inventory rating40.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length174 ft (53.1 m)
Longest span103 ft (31.4 m)
Deck width84 ft (25.6 m)
Roadway width81 ft (24.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic132,500 (2016)
Projected traffic147,500 by 2042
Trucks6%
Lanes on structure5
Traffic directionOne-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 EB over Magnolia Ave built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 2000.

What condition is State Route 91 EB over Magnolia Ave 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 September 2024.

How much traffic does State Route 91 EB over Magnolia Ave carry?

About 132,500 vehicles per day (2016 count), of which roughly 6% are trucks.

How long is State Route 91 EB over Magnolia Ave?

The structure is 174 ft (53.1 m) long with a longest span of 103 ft (31.4 m) and a deck 84 ft wide.

Who owns State Route 91 EB over Magnolia Ave?

It is owned by the State Highway Agency.