US Bridges

55th ST over Acta

Fair

Los Angeles County, California · E/O Alameda ST · Structure no. 53C2122

Built
2000
25 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
7,019
2017 count
Owner
City
City or Municipal Highway Agency

About this bridge

55th ST over Acta is a prestressed concrete stringer/multi-beam or girder carrying 55th ST over Acta in Los Angeles County, California. It was built in 2000, so it is 25 years old, younger 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 7,019 vehicles a day, roughly 24% of them trucks, projected to reach 8,071 by 2042. The structure is 60 ft (18.3 m) long and 102 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
Carries55th ST
CrossesActa
LocationE/O Alameda ST
RouteCity Street 0
CountyLos Angeles County
StateCalifornia
Coordinates33.99288, -118.23815
Functional classUrban Local

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating101.1 US tons
Inventory rating77.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length60 ft (18.3 m)
Longest span51 ft (15.5 m)
Deck width102 ft (31 m)
Roadway width99 ft (30.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,019 (2017)
Projected traffic8,071 by 2042
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed0.6 mi (1 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 55th ST over Acta built?

It was built in 2000, making it 25 years old in 2025.

What condition is 55th ST over Acta 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 September 2024.

How much traffic does 55th ST over Acta carry?

About 7,019 vehicles per day (2017 count), of which roughly 24% are trucks.

How long is 55th ST over Acta?

The structure is 60 ft (18.3 m) long with a longest span of 51 ft (15.5 m) and a deck 102 ft wide.

Who owns 55th ST over Acta?

It is owned by the City or Municipal Highway Agency.