US Bridges

SR 73 NB over Bonita Canyon Drive

Fair

Orange County, California · 12-ORA-073-22.50-IRVN · Structure no. 55 0760R

Built
1996
29 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
315 ft
3 main spans
Daily traffic
33,000
2020 count
Owner
State
State Highway Agency

About this bridge

SR 73 NB over Bonita Canyon Drive is a prestressed concrete continuous box beam or girders - multiple carrying SR 73 NB over Bonita Canyon Drive in Orange County, California. It was built in 1996, so it is 29 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 33,000 vehicles a day, projected to reach 40,200 by 2040. The structure is 315 ft (96 m) long and 76 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesSR 73 NB
CrossesBonita Canyon Drive
Location12-ORA-073-22.50-IRVN
RouteState Highway 73
CountyOrange County
StateCalifornia
Coordinates33.63105, -117.84142
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.
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 geometry8: 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 - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length315 ft (96 m)
Longest span157 ft (48 m)
Deck width76 ft (23.1 m)
Roadway width73 ft (22.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33,000 (2020)
Projected traffic40,200 by 2040
Trucks0%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed2.5 mi (4 km)
TollOn a toll 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 SR 73 NB over Bonita Canyon Drive built?

It was built in 1996, making it 29 years old in 2025.

What condition is SR 73 NB over Bonita Canyon Drive 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 August 2023.

How much traffic does SR 73 NB over Bonita Canyon Drive carry?

About 33,000 vehicles per day (2020 count).

How long is SR 73 NB over Bonita Canyon Drive?

The structure is 315 ft (96 m) long with a longest span of 157 ft (48 m) and a deck 76 ft wide.

Who owns SR 73 NB over Bonita Canyon Drive?

It is owned by the State Highway Agency.