US Bridges

Interstate 5 over Oso Creek

Fair

Orange County, California · 12-ORA-005-14.79-MSNV · Structure no. 55 0233

Built
1959
66 years old, rebuilt 2024
Condition
Fair
inspected June 2024
Type
Slab
Concrete Continuous
Length
254 ft
9 main spans
Daily traffic
194,000
2022 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 over Oso Creek is a concrete continuous slab carrying Interstate 5 over Oso Creek in Orange County, California. It was built in 1959 and reconstructed in 2024, so it is 66 years old, older 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 194,000 vehicles a day, roughly 8% of them trucks, projected to reach 326,454 by 2046. The structure is 254 ft (77.4 m) long and 213 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesInterstate 5
CrossesOso Creek
Location12-ORA-005-14.79-MSNV
RouteInterstate 5
CountyOrange County
StateCalifornia
Coordinates33.57392, -117.67154
Functional classUrban Principal Arterial - Interstate

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 protection8 Very GoodNo problems noted.
Last inspectionJune 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 rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20
Structure length254 ft (77.4 m)
Longest span29 ft (8.8 m)
Deck width213 ft (64.9 m)
Roadway width207 ft (63 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic194,000 (2022)
Projected traffic326,454 by 2046
Trucks8%
Lanes on structure14
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Interstate 5 over Oso Creek built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2024.

What condition is Interstate 5 over Oso 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 June 2024.

How much traffic does Interstate 5 over Oso Creek carry?

About 194,000 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Interstate 5 over Oso Creek?

The structure is 254 ft (77.4 m) long with a longest span of 29 ft (8.8 m) and a deck 213 ft wide.

Who owns Interstate 5 over Oso Creek?

It is owned by the State Highway Agency.