US Bridges

Carlsbad Blvd over Mtdb BNSF RY AMTRAK

Good

San Diego County, California · 0.5MI N/O Carlsbad Vlg RD · Structure no. 57C0134

Built
1925
100 years old, rebuilt 1935
Condition
Good
inspected August 2023
Type
Tee Beam
Concrete
Length
165 ft
5 main spans
Daily traffic
20,713
2016 count
Owner
City
City or Municipal Highway Agency

About this bridge

Carlsbad Blvd over Mtdb BNSF RY AMTRAK is a concrete tee beam carrying Carlsbad Blvd over Mtdb BNSF RY AMTRAK in San Diego County, California. It was built in 1925 and reconstructed in 1935, so it is 100 years old, older 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 20,713 vehicles a day, roughly 1% of them trucks, projected to reach 30,474 by 2040. The structure is 165 ft (50.3 m) long and 52 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesCarlsbad Blvd
CrossesMtdb BNSF RY AMTRAK
Location0.5MI N/O Carlsbad Vlg RD
RouteCity Street 0
Coordinates33.16386, -117.35432
Functional classUrban Minor Arterial

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.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating51.8 US tons
Inventory rating31.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length165 ft (50.3 m)
Longest span45 ft (13.7 m)
Deck width52 ft (15.7 m)
Roadway width36 ft (11.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,713 (2016)
Projected traffic30,474 by 2040
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Carlsbad Blvd over Mtdb BNSF RY AMTRAK built?

It was built in 1925, making it 100 years old in 2025. It was reconstructed in 1935.

What condition is Carlsbad Blvd over Mtdb BNSF RY AMTRAK 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 August 2023.

How much traffic does Carlsbad Blvd over Mtdb BNSF RY AMTRAK carry?

About 20,713 vehicles per day (2016 count), of which roughly 1% are trucks.

How long is Carlsbad Blvd over Mtdb BNSF RY AMTRAK?

The structure is 165 ft (50.3 m) long with a longest span of 45 ft (13.7 m) and a deck 52 ft wide.

Who owns Carlsbad Blvd over Mtdb BNSF RY AMTRAK?

It is owned by the City or Municipal Highway Agency.