US Bridges

Placentia Ave over State Route 91

Good

Orange County, California · 12-ORA-091-5.53-ANA · Structure no. 55 0853

Built
1999
26 years old
Condition
Good
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
295 ft
2 main spans
Daily traffic
10,000
2020 count
Owner
State
State Highway Agency

About this bridge

Placentia Ave over State Route 91 is a prestressed concrete continuous box beam or girders - multiple carrying Placentia Ave over State Route 91 in Orange County, California. It was built in 1999, so it is 26 years old, younger 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 10,000 vehicles a day, roughly 5% of them trucks, projected to reach 11,000 by 2040. The structure is 295 ft (89.9 m) long and 64 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesPlacentia Ave
CrossesState Route 91
Location12-ORA-091-5.53-ANA
RouteCity Street 0M181
Coordinates33.85412, -117.88489
Functional classUrban Collector

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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.6 US tons
Inventory rating44.3 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length295 ft (89.9 m)
Longest span157 ft (47.8 m)
Deck width64 ft (19.5 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,000 (2020)
Projected traffic11,000 by 2040
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Placentia Ave over State Route 91 built?

It was built in 1999, making it 26 years old in 2025.

What condition is Placentia Ave over State Route 91 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 May 2023.

How much traffic does Placentia Ave over State Route 91 carry?

About 10,000 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Placentia Ave over State Route 91?

The structure is 295 ft (89.9 m) long with a longest span of 157 ft (47.8 m) and a deck 64 ft wide.

Who owns Placentia Ave over State Route 91?

It is owned by the State Highway Agency.