US Bridges

State Route 1 over UP RR

Good

Los Angeles County, California · 07-LA-001-8.34-LBCH · Structure no. 53 0347

Built
1948
77 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
152 ft
3 main spans
Daily traffic
26,000
2023 count
Owner
State
State Highway Agency

About this bridge

State Route 1 over UP RR is a steel stringer/multi-beam or girder carrying State Route 1 over UP RR in Los Angeles County, California. It was built in 1948, so it is 77 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 26,000 vehicles a day, roughly 11% of them trucks, projected to reach 36,500 by 2045. The structure is 152 ft (46.3 m) long and 113 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesState Route 1
CrossesUP RR
Location07-LA-001-8.34-LBCH
RouteState Highway 1
CountyLos Angeles County
StateCalifornia
Coordinates33.79011, -118.22586
Functional classUrban Other Principal 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 inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.4 US tons
Inventory rating29.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length152 ft (46.3 m)
Longest span52 ft (15.8 m)
Deck width113 ft (34.4 m)
Roadway width95 ft (29 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,000 (2023)
Projected traffic36,500 by 2045
Trucks11%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.9 mi (3 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 State Route 1 over UP RR built?

It was built in 1948, making it 77 years old in 2025.

What condition is State Route 1 over UP RR 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 December 2023.

How much traffic does State Route 1 over UP RR carry?

About 26,000 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is State Route 1 over UP RR?

The structure is 152 ft (46.3 m) long with a longest span of 52 ft (15.8 m) and a deck 113 ft wide.

Who owns State Route 1 over UP RR?

It is owned by the State Highway Agency.