US Bridges

State Route 91 over Stanton Ave

Good

Orange County, California · 12-ORA-091-R2.85-BPK · Structure no. 55 0301

Built
1970
55 years old, rebuilt 1998
Condition
Good
inspected September 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
126 ft
1 main span
Daily traffic
268,000
2016 count
Owner
State
State Highway Agency

About this bridge

State Route 91 over Stanton Ave is a prestressed concrete box beam or girders - multiple carrying State Route 91 over Stanton Ave in Orange County, California. It was built in 1970 and reconstructed in 1998, so it is 55 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 268,000 vehicles a day, roughly 8% of them trucks, projected to reach 299,000 by 2042. The structure is 126 ft (38.4 m) long and 181 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesState Route 91
CrossesStanton Ave
Location12-ORA-091-R2.85-BPK
RouteState Highway 91
Coordinates33.85586, -117.99394
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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length126 ft (38.4 m)
Longest span124 ft (37.8 m)
Deck width181 ft (55.3 m)
Roadway width176 ft (53.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic268,000 (2016)
Projected traffic299,000 by 2042
Trucks8%
Lanes on structure12
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 Stanton Ave built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1998.

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

About 268,000 vehicles per day (2016 count), of which roughly 8% are trucks.

How long is State Route 91 over Stanton Ave?

The structure is 126 ft (38.4 m) long with a longest span of 124 ft (37.8 m) and a deck 181 ft wide.

Who owns State Route 91 over Stanton Ave?

It is owned by the State Highway Agency.