US Bridges

N73-S55 Connector over Santa Ana Delhi Channel

Fair

Orange County, California · 12-ORA-073-R26.57-NPTB · Structure no. 55 1029G

Built
1999
26 years old
Condition
Fair
inspected May 2024
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
289 ft
3 main spans
Daily traffic
28,130
2014 count
Owner
State
State Highway Agency

About this bridge

N73-S55 Connector over Santa Ana Delhi Channel is a concrete continuous box beam or girders - single or spread carrying N73-S55 Connector over Santa Ana Delhi Channel 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 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 28,130 vehicles a day, roughly 1% of them trucks, projected to reach 30,940 by 2042. The structure is 289 ft (88 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesN73-S55 Connector
CrossesSanta Ana Delhi Channel
Location12-ORA-073-R26.57-NPTB
RouteState Highway 73
CountyOrange County
StateCalifornia
Coordinates33.67474, -117.88557
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length289 ft (88 m)
Longest span108 ft (33 m)
Deck width34 ft (10.3 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,130 (2014)
Projected traffic30,940 by 2042
Trucks1%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesRelief for waterway
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 N73-S55 Connector over Santa Ana Delhi Channel built?

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

What condition is N73-S55 Connector over Santa Ana Delhi Channel 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 May 2024.

How much traffic does N73-S55 Connector over Santa Ana Delhi Channel carry?

About 28,130 vehicles per day (2014 count), of which roughly 1% are trucks.

How long is N73-S55 Connector over Santa Ana Delhi Channel?

The structure is 289 ft (88 m) long with a longest span of 108 ft (33 m) and a deck 34 ft wide.

Who owns N73-S55 Connector over Santa Ana Delhi Channel?

It is owned by the State Highway Agency.