US Bridges

WB52&NB5-LA Jolla over Mtdb BNSF AMTRAK I 5 Con

Fair

San Diego County, California · 11-SD-052-0.19-SD · Structure no. 57 0520L

Built
1966
59 years old
Condition
Fair
inspected February 2025
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
1,763 ft
17 main spans
Daily traffic
18,200
2019 count
Owner
State
State Highway Agency

About this bridge

WB52&NB5-LA Jolla over Mtdb BNSF AMTRAK I 5 Con is a concrete continuous box beam or girders - single or spread carrying WB52&NB5-LA Jolla over Mtdb BNSF AMTRAK I 5 Con in San Diego County, California. It was built in 1966, so it is 59 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 6 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 18,200 vehicles a day, roughly 3% of them trucks, projected to reach 21,519 by 2043. The structure is 1,763 ft (537.4 m) long and 46 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesWB52&NB5-LA Jolla
CrossesMtdb BNSF AMTRAK I 5 Con
Location11-SD-052-0.19-SD
RouteState Highway 52
CountySan Diego County
StateCalifornia
Coordinates32.83849, -117.23471
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.4 US tons
Inventory rating46.1 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans17
Design loadHS 20 + Mod
Structure length1,763 ft (537.4 m)
Longest span130 ft (39.6 m)
Deck width46 ft (14 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,200 (2019)
Projected traffic21,519 by 2043
Trucks3%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was WB52&NB5-LA Jolla over Mtdb BNSF AMTRAK I 5 Con built?

It was built in 1966, making it 59 years old in 2025.

What condition is WB52&NB5-LA Jolla over Mtdb BNSF AMTRAK I 5 Con 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 February 2025.

How much traffic does WB52&NB5-LA Jolla over Mtdb BNSF AMTRAK I 5 Con carry?

About 18,200 vehicles per day (2019 count), of which roughly 3% are trucks.

How long is WB52&NB5-LA Jolla over Mtdb BNSF AMTRAK I 5 Con?

The structure is 1,763 ft (537.4 m) long with a longest span of 130 ft (39.6 m) and a deck 46 ft wide.

Who owns WB52&NB5-LA Jolla over Mtdb BNSF AMTRAK I 5 Con?

It is owned by the State Highway Agency.