US Bridges

S73-MACARTHUR Off over Bonita Creek

Good

Orange County, California · 12-ORA-073-23.78-IRVN · Structure no. 55 0733K

Built
1996
29 years old, rebuilt 2020
Condition
Good
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
371 ft
3 main spans
Daily traffic
6,270
2014 count
Owner
State
State Highway Agency

About this bridge

S73-MACARTHUR Off over Bonita Creek is a prestressed concrete continuous box beam or girders - multiple carrying S73-MACARTHUR Off over Bonita Creek in Orange County, California. It was built in 1996 and reconstructed in 2020, 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 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 6,270 vehicles a day, roughly 1% of them trucks, projected to reach 6,900 by 2042. The structure is 371 ft (113 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesS73-MACARTHUR Off
CrossesBonita Creek
Location12-ORA-073-23.78-IRVN
RouteState Highway 73
Coordinates33.64028, -117.86085
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.
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 evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length371 ft (113 m)
Longest span138 ft (42 m)
Deck width39 ft (12 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,270 (2014)
Projected traffic6,900 by 2042
Trucks1%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 S73-MACARTHUR Off over Bonita Creek built?

It was built in 1996, making it 29 years old in 2025. It was reconstructed in 2020.

What condition is S73-MACARTHUR Off over Bonita Creek 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 2024.

How much traffic does S73-MACARTHUR Off over Bonita Creek carry?

About 6,270 vehicles per day (2014 count), of which roughly 1% are trucks.

How long is S73-MACARTHUR Off over Bonita Creek?

The structure is 371 ft (113 m) long with a longest span of 138 ft (42 m) and a deck 39 ft wide.

Who owns S73-MACARTHUR Off over Bonita Creek?

It is owned by the State Highway Agency.