US Bridges

W/B Snta Mrgta Pwy over Arroyo Trabuco

Good

Orange County, California · 0.2 MI E/O Alicia Parkway · Structure no. 55C0520L

Built
1991
34 years old
Condition
Good
inspected September 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
1,207 ft
7 main spans
Daily traffic
29,150
2017 count
Owner
County
County Highway Agency

About this bridge

W/B Snta Mrgta Pwy over Arroyo Trabuco is a prestressed concrete continuous box beam or girders - multiple carrying W/B Snta Mrgta Pwy over Arroyo Trabuco in Orange County, California. It was built in 1991, so it is 34 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 29,150 vehicles a day, roughly 1% of them trucks, projected to reach 49,166 by 2042. The structure is 1,207 ft (367.9 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesW/B Snta Mrgta Pwy
CrossesArroyo Trabuco
Location0.2 MI E/O Alicia Parkway
RouteCounty Highway 0
Coordinates33.63815, -117.61779
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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
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

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20 + Mod
Structure length1,207 ft (367.9 m)
Longest span184 ft (56.1 m)
Deck width52 ft (15.8 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,150 (2017)
Projected traffic49,166 by 2042
Trucks1%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 W/B Snta Mrgta Pwy over Arroyo Trabuco built?

It was built in 1991, making it 34 years old in 2025.

What condition is W/B Snta Mrgta Pwy over Arroyo Trabuco 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 W/B Snta Mrgta Pwy over Arroyo Trabuco carry?

About 29,150 vehicles per day (2017 count), of which roughly 1% are trucks.

How long is W/B Snta Mrgta Pwy over Arroyo Trabuco?

The structure is 1,207 ft (367.9 m) long with a longest span of 184 ft (56.1 m) and a deck 52 ft wide.

Who owns W/B Snta Mrgta Pwy over Arroyo Trabuco?

It is owned by the County Highway Agency.