US Bridges

N55-W91 Connector over State Route 91

Fair

Orange County, California · 12-ORA-055-R17.76-ANA · Structure no. 55 0329G

Built
1962
63 years old
Condition
Fair
inspected March 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
350 ft
4 main spans
Daily traffic
23,737
2020 count
Owner
State
State Highway Agency

About this bridge

N55-W91 Connector over State Route 91 is a concrete continuous box beam or girders - multiple carrying N55-W91 Connector over State Route 91 in Orange County, California. It was built in 1962, so it is 63 years old, older 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 23,737 vehicles a day, roughly 6% of them trucks, projected to reach 35,000 by 2042. The structure is 350 ft (106.7 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesN55-W91 Connector
CrossesState Route 91
Location12-ORA-055-R17.76-ANA
RouteState Highway 55
CountyOrange County
StateCalifornia
Coordinates33.84433, -117.82869
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionMarch 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 geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.9 US tons
Inventory rating40.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length350 ft (106.7 m)
Longest span98 ft (29.9 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,737 (2020)
Projected traffic35,000 by 2042
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 N55-W91 Connector over State Route 91 built?

It was built in 1962, making it 63 years old in 2025.

What condition is N55-W91 Connector over State Route 91 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 March 2024.

How much traffic does N55-W91 Connector over State Route 91 carry?

About 23,737 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is N55-W91 Connector over State Route 91?

The structure is 350 ft (106.7 m) long with a longest span of 98 ft (29.9 m) and a deck 34 ft wide.

Who owns N55-W91 Connector over State Route 91?

It is owned by the State Highway Agency.