US Bridges

Interstate 5 NB over San Luis Rey River

Poor

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

Built
1970
55 years old
Condition
Poor
inspected April 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
681 ft
6 main spans
Daily traffic
78,500
2020 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 NB over San Luis Rey River is a concrete continuous box beam or girders - multiple carrying Interstate 5 NB over San Luis Rey River in San Diego County, California. It was built in 1970, so it is 55 years old, older 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 78,500 vehicles a day, roughly 6% of them trucks, projected to reach 139,500 by 2045. The structure is 681 ft (207.6 m) long and 78 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesInterstate 5 NB
CrossesSan Luis Rey River
Location11-SD-005-R54.04-OCN
RouteInterstate 5
Coordinates33.20607, -117.38405
Functional classUrban Principal Arterial - Interstate

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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, 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 evaluation4: Meets minimum tolerable limits to be 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 rating72.9 US tons
Inventory rating43.9 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length681 ft (207.6 m)
Longest span133 ft (40.5 m)
Deck width78 ft (23.8 m)
Roadway width76 ft (23.2 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$8 million (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Interstate 5 NB over San Luis Rey River built?

It was built in 1970, making it 55 years old in 2025.

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

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

The structure is 681 ft (207.6 m) long with a longest span of 133 ft (40.5 m) and a deck 78 ft wide.

Who owns Interstate 5 NB over San Luis Rey River?

It is owned by the State Highway Agency.