US Bridges

WB Trabuco Road over Aliso Creek

Good

Orange County, California · 0.35 Mi. E/O El Toro Road · Structure no. 55C0216L

Built
1975
50 years old
Condition
Good
inspected September 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
204 ft
2 main spans
Daily traffic
16,500
2017 count
Owner
City
City or Municipal Highway Agency

About this bridge

WB Trabuco Road over Aliso Creek is a concrete continuous box beam or girders - multiple carrying WB Trabuco Road over Aliso Creek in Orange County, California. It was built in 1975, so it is 50 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 16,500 vehicles a day, roughly 1% of them trucks, projected to reach 25,652 by 2041. The structure is 204 ft (62.2 m) long and 42 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesWB Trabuco Road
CrossesAliso Creek
Location0.35 Mi. E/O El Toro Road
RouteCity Street 0
Coordinates33.63304, -117.67648
Functional classUrban Other Principal Arterial

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length204 ft (62.2 m)
Longest span100 ft (30.5 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,500 (2017)
Projected traffic25,652 by 2041
Trucks1%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 WB Trabuco Road over Aliso Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is WB Trabuco Road over Aliso 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 September 2024.

How much traffic does WB Trabuco Road over Aliso Creek carry?

About 16,500 vehicles per day (2017 count), of which roughly 1% are trucks.

How long is WB Trabuco Road over Aliso Creek?

The structure is 204 ft (62.2 m) long with a longest span of 100 ft (30.5 m) and a deck 42 ft wide.

Who owns WB Trabuco Road over Aliso Creek?

It is owned by the City or Municipal Highway Agency.