US Bridges

I 5 NB over Santiago Creek

Good

Orange County, California · 12-ORA-005-33.39-SA · Structure no. 55 1046R

Built
1996
29 years old
Condition
Good
inspected November 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
165 ft
2 main spans
Daily traffic
183,000
2016 count
Owner
State
State Highway Agency

About this bridge

I 5 NB over Santiago Creek is a prestressed concrete continuous box beam or girders - multiple carrying I 5 NB over Santiago Creek in Orange County, California. It was built in 1996, so it is 29 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 183,000 vehicles a day, roughly 5% of them trucks, projected to reach 200,463 by 2041. The structure is 165 ft (50.2 m) long and 131 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 5 NB
CrossesSantiago Creek
Location12-ORA-005-33.39-SA
RouteInterstate 5
Coordinates33.77168, -117.86969
Functional classUrban Principal Arterial - Interstate

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 protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
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

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length165 ft (50.2 m)
Longest span82 ft (25.1 m)
Deck width131 ft (39.9 m)
Roadway width122 ft (37.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic183,000 (2016)
Projected traffic200,463 by 2041
Trucks5%
Lanes on structure7
Traffic directionOne-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 I 5 NB over Santiago Creek built?

It was built in 1996, making it 29 years old in 2025.

What condition is I 5 NB over Santiago 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 November 2023.

How much traffic does I 5 NB over Santiago Creek carry?

About 183,000 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is I 5 NB over Santiago Creek?

The structure is 165 ft (50.2 m) long with a longest span of 82 ft (25.1 m) and a deck 131 ft wide.

Who owns I 5 NB over Santiago Creek?

It is owned by the State Highway Agency.