US Bridges

Jeronimo Road over Aliso Creek

Fair

Orange County, California · 0.35 Mi. S/O Toro Road · Structure no. 55C0155

Built
1974
51 years old
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
87 ft
1 main span
Daily traffic
28,281
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Jeronimo Road over Aliso Creek is a prestressed concrete box beam or girders - multiple carrying Jeronimo Road over Aliso Creek in Orange County, California. It was built in 1974, so it is 51 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 5 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 28,281 vehicles a day, roughly 1% of them trucks, projected to reach 42,048 by 2045. The structure is 87 ft (26.5 m) long and 95 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesJeronimo Road
CrossesAliso Creek
Location0.35 Mi. S/O Toro Road
RouteCity Street 0
CountyOrange County
StateCalifornia
Coordinates33.62483, -117.68667
Functional classUrban Other Principal 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.2 US tons
Inventory rating45 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length87 ft (26.5 m)
Longest span84 ft (25.6 m)
Deck width95 ft (29 m)
Roadway width83 ft (25.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,281 (2020)
Projected traffic42,048 by 2045
Trucks1%
Lanes on structure4
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

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 Jeronimo Road over Aliso Creek built?

It was built in 1974, making it 51 years old in 2025.

What condition is Jeronimo Road over Aliso 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 September 2024.

How much traffic does Jeronimo Road over Aliso Creek carry?

About 28,281 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Jeronimo Road over Aliso Creek?

The structure is 87 ft (26.5 m) long with a longest span of 84 ft (25.6 m) and a deck 95 ft wide.

Who owns Jeronimo Road over Aliso Creek?

It is owned by the City or Municipal Highway Agency.