US Bridges

120th ST over Compton Crk

Fair

Los Angeles County, California · 0.1MI E/O Central Ave · Structure no. 53C0625

Built
1953
72 years old
Condition
Fair
inspected July 2021
Type
Stringer/Multi-beam or Girder
Steel
Length
58 ft
1 main span
Daily traffic
10,435
2012 count
Owner
County
County Highway Agency

About this bridge

120th ST over Compton Crk is a steel stringer/multi-beam or girder carrying 120th ST over Compton Crk in Los Angeles County, California. It was built in 1953, so it is 72 years old, older 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 10,435 vehicles a day, roughly 2% of them trucks, projected to reach 12,000 by 2041. The structure is 58 ft (17.7 m) long and 80 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries120th ST
CrossesCompton Crk
Location0.1MI E/O Central Ave
RouteCounty Highway 0L137
CountyLos Angeles County
StateCalifornia
Coordinates33.92364, -118.25178
Functional classUrban Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJuly 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.8 US tons
Inventory rating42.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length58 ft (17.7 m)
Longest span56 ft (17.1 m)
Deck width80 ft (24.4 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic10,435 (2012)
Projected traffic12,000 by 2041
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 120th ST over Compton Crk built?

It was built in 1953, making it 72 years old in 2025.

What condition is 120th ST over Compton Crk 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 July 2021.

How much traffic does 120th ST over Compton Crk carry?

About 10,435 vehicles per day (2012 count), of which roughly 2% are trucks.

How long is 120th ST over Compton Crk?

The structure is 58 ft (17.7 m) long with a longest span of 56 ft (17.1 m) and a deck 80 ft wide.

Who owns 120th ST over Compton Crk?

It is owned by the County Highway Agency.