US Bridges

4th ST Ramp C over Flower Street

Good

Los Angeles County, California · At Flower Street · Structure no. 53C1172

Built
1972
53 years old
Condition
Good
inspected August 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
364 ft
5 main spans
Daily traffic
1,680
2018 count
Owner
City
City or Municipal Highway Agency

About this bridge

4th ST Ramp C over Flower Street is a concrete continuous box beam or girders - multiple carrying 4th ST Ramp C over Flower Street in Los Angeles County, California. It was built in 1972, so it is 53 years old, younger 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 1,680 vehicles a day, roughly 1% of them trucks, projected to reach 1,830 by 2044. The structure is 364 ft (110.8 m) long and 25 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Carries4th ST Ramp C
CrossesFlower Street
LocationAt Flower Street
RouteCity Street 0
Coordinates34.05312, -118.25534
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 inspectionAugust 2024
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 alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length364 ft (110.8 m)
Longest span84 ft (25.5 m)
Deck width25 ft (7.5 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deck30 ft (9.1 m)

Traffic and service

Average daily traffic1,680 (2018)
Projected traffic1,830 by 2044
Trucks1%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 4th ST Ramp C over Flower Street built?

It was built in 1972, making it 53 years old in 2025.

What condition is 4th ST Ramp C over Flower Street 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 2024.

How much traffic does 4th ST Ramp C over Flower Street carry?

About 1,680 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is 4th ST Ramp C over Flower Street?

The structure is 364 ft (110.8 m) long with a longest span of 84 ft (25.5 m) and a deck 25 ft wide.

Who owns 4th ST Ramp C over Flower Street?

It is owned by the City or Municipal Highway Agency.