US Bridges

Interstate 5 SB over San Luis Rey River

Fair

San Diego County, California · 11-SD-005-R54.04-OCN · Structure no. 57 0713L

Built
1971
54 years old
Condition
Fair
inspected April 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
678 ft
9 main spans
Daily traffic
78,500
2020 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 SB over San Luis Rey River is a concrete continuous box beam or girders - multiple carrying Interstate 5 SB over San Luis Rey River in San Diego County, California. It was built in 1971, so it is 54 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 78,500 vehicles a day, roughly 6% of them trucks, projected to reach 139,500 by 2045. The structure is 678 ft (206.7 m) long and 77 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesInterstate 5 SB
CrossesSan Luis Rey River
Location11-SD-005-R54.04-OCN
RouteInterstate 5
Coordinates33.2059, -117.38434
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating110 US tons
Inventory rating70.3 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20
Structure length678 ft (206.7 m)
Longest span133 ft (40.5 m)
Deck width77 ft (23.5 m)
Roadway width75 ft (22.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic78,500 (2020)
Projected traffic139,500 by 2045
Trucks6%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 SB over San Luis Rey River built?

It was built in 1971, making it 54 years old in 2025.

What condition is Interstate 5 SB over San Luis Rey River 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 April 2024.

How much traffic does Interstate 5 SB over San Luis Rey River carry?

About 78,500 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is Interstate 5 SB over San Luis Rey River?

The structure is 678 ft (206.7 m) long with a longest span of 133 ft (40.5 m) and a deck 77 ft wide.

Who owns Interstate 5 SB over San Luis Rey River?

It is owned by the State Highway Agency.