US Bridges

Jeronimo Road over Oso Creek

Poor

Orange County, California · .30 MI E Marguerite Pkwy · Structure no. 55C0493

Built
1973
52 years old
Condition
Poor
inspected May 2024
Type
Culvert
Steel
Length
26 ft
1 main span
Daily traffic
15,313
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Jeronimo Road over Oso Creek is a steel culvert carrying Jeronimo Road over Oso Creek in Orange County, California. It was built in 1973, so it is 52 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 15,313 vehicles a day, roughly 1% of them trucks, projected to reach 27,240 by 2044. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesJeronimo Road
CrossesOso Creek
Location.30 MI E Marguerite Pkwy
RouteCity Street 0
CountyOrange County
StateCalifornia
Coordinates33.60778, -117.64982
Functional classUrban Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span25 ft (7.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,313 (2020)
Projected traffic27,240 by 2044
Trucks1%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.1 million (2021 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Jeronimo Road over Oso Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is Jeronimo Road over Oso Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.

How much traffic does Jeronimo Road over Oso Creek carry?

About 15,313 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Jeronimo Road over Oso Creek?

The structure is 26 ft (7.9 m) long with a longest span of 25 ft (7.6 m).

Who owns Jeronimo Road over Oso Creek?

It is owned by the City or Municipal Highway Agency.