US Bridges

Aliso Creek Road over Aliso Creek

Good

Orange County, California · 100 W/O Alicia Parkway · Structure no. 55C0550

Built
1988
37 years old, rebuilt 1993
Condition
Good
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
170 ft
1 main span
Daily traffic
25,915
2018 count
Owner
County
County Highway Agency

About this bridge

Aliso Creek Road over Aliso Creek is a prestressed concrete box beam or girders - multiple carrying Aliso Creek Road over Aliso Creek in Orange County, California. It was built in 1988 and reconstructed in 1993, so it is 37 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 25,915 vehicles a day, roughly 1% of them trucks, projected to reach 48,795 by 2041. The structure is 170 ft (51.9 m) long and 125 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesAliso Creek Road
CrossesAliso Creek
Location100 W/O Alicia Parkway
RouteCounty Highway 0
Coordinates33.55548, -117.71877
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 inspectionMay 2023
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
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length170 ft (51.9 m)
Longest span164 ft (50 m)
Deck width125 ft (38 m)
Roadway width113 ft (34.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,915 (2018)
Projected traffic48,795 by 2041
Trucks1%
Lanes on structure9
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 Aliso Creek Road over Aliso Creek built?

It was built in 1988, making it 37 years old in 2025. It was reconstructed in 1993.

What condition is Aliso Creek 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 May 2023.

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

About 25,915 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is Aliso Creek Road over Aliso Creek?

The structure is 170 ft (51.9 m) long with a longest span of 164 ft (50 m) and a deck 125 ft wide.

Who owns Aliso Creek Road over Aliso Creek?

It is owned by the County Highway Agency.