US Bridges

Main Street over Route 101

Good

Los Angeles County, California · 07-LA-101-0.93-LA · Structure no. 53 0628

Built
1950
75 years old
Condition
Good
inspected April 2021
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
141 ft
2 main spans
Daily traffic
50,000
2021 count
Owner
State
State Highway Agency

About this bridge

Main Street over Route 101 is a concrete continuous box beam or girders - multiple carrying Main Street over Route 101 in Los Angeles County, California. It was built in 1950, so it is 75 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 50,000 vehicles a day, roughly 2% of them trucks, projected to reach 65,000 by 2039. The structure is 141 ft (43 m) long and 93 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesMain Street
CrossesRoute 101
Location07-LA-101-0.93-LA
RouteCity Street 0L043
Coordinates34.05543, -118.24025
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 inspectionApril 2021
Inspection intervalevery 48 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 alignment8: Equal to present desirable criteria
Operating rating83.6 US tons
Inventory rating50 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length141 ft (43 m)
Longest span74 ft (22.6 m)
Deck width93 ft (28.3 m)
Roadway width63 ft (19.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50,000 (2021)
Projected traffic65,000 by 2039
Trucks2%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 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 Main Street over Route 101 built?

It was built in 1950, making it 75 years old in 2025.

What condition is Main Street over Route 101 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 April 2021.

How much traffic does Main Street over Route 101 carry?

About 50,000 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is Main Street over Route 101?

The structure is 141 ft (43 m) long with a longest span of 74 ft (22.6 m) and a deck 93 ft wide.

Who owns Main Street over Route 101?

It is owned by the State Highway Agency.