US Bridges

Bonita Canyon Road over Bonita Creek

Fair

Orange County, California · 12-ORA-073-22.52-NPTB · Structure no. 55 0933Z

Built
1996
29 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete Continuous
Length
75 ft
6 main spans
Daily traffic
10,000
2020 count
Owner
State
State Highway Agency

About this bridge

Bonita Canyon Road over Bonita Creek is a concrete continuous culvert carrying Bonita Canyon Road over Bonita Creek 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 6 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 10,000 vehicles a day, roughly 1% of them trucks, projected to reach 11,000 by 2040. The structure is 75 ft (23 m) long and 149 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesBonita Canyon Road
CrossesBonita Creek
Location12-ORA-073-22.52-NPTB
RouteState Highway 73
CountyOrange County
StateCalifornia
Coordinates33.63026, -117.84286
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable 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

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadUnknown
Structure length75 ft (23 m)
Longest span12 ft (3.7 m)
Deck width149 ft (45.5 m)
Roadway width146 ft (44.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,000 (2020)
Projected traffic11,000 by 2040
Trucks1%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Bonita Canyon Road over Bonita Creek built?

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

What condition is Bonita Canyon Road over Bonita Creek 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 2023.

How much traffic does Bonita Canyon Road over Bonita Creek carry?

About 10,000 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Bonita Canyon Road over Bonita Creek?

The structure is 75 ft (23 m) long with a longest span of 12 ft (3.7 m) and a deck 149 ft wide.

Who owns Bonita Canyon Road over Bonita Creek?

It is owned by the State Highway Agency.