US Bridges

State Route 91 over Acacia Street

Good

Orange County, California · 12-ORA-091-4.76-ANA · Structure no. 55 0218

Built
1959
66 years old, rebuilt 1999
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
122 ft
3 main spans
Daily traffic
265,000
2014 count
Owner
State
State Highway Agency

About this bridge

State Route 91 over Acacia Street is a steel stringer/multi-beam or girder carrying State Route 91 over Acacia Street in Orange County, California. It was built in 1959 and reconstructed in 1999, 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 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 265,000 vehicles a day, roughly 6% of them trucks, projected to reach 295,000 by 2040. The structure is 122 ft (37.1 m) long and 157 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesState Route 91
CrossesAcacia Street
Location12-ORA-091-4.76-ANA
RouteState Highway 91
Coordinates33.85373, -117.89824
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 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 alignment8: Equal to present desirable criteria
Operating rating91.1 US tons
Inventory rating54.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length122 ft (37.1 m)
Longest span67 ft (20.4 m)
Deck width157 ft (47.9 m)
Roadway width152 ft (46.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic265,000 (2014)
Projected traffic295,000 by 2040
Trucks6%
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 Acacia Street built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1999.

What condition is State Route 91 over Acacia Street 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 August 2023.

How much traffic does State Route 91 over Acacia Street carry?

About 265,000 vehicles per day (2014 count), of which roughly 6% are trucks.

How long is State Route 91 over Acacia Street?

The structure is 122 ft (37.1 m) long with a longest span of 67 ft (20.4 m) and a deck 157 ft wide.

Who owns State Route 91 over Acacia Street?

It is owned by the State Highway Agency.