US Bridges

Seco ST over Arroyo Seco Chan

Fair

Los Angeles County, California · 0.1MI W/O Arroyo Blvd · Structure no. 53C0756

Built
1939
86 years old
Condition
Fair
inspected July 2024
Type
Slab
Concrete
Length
67 ft
1 main span
Daily traffic
1,793
2014 count
Owner
City
City or Municipal Highway Agency

About this bridge

Seco ST over Arroyo Seco Chan is a concrete slab carrying Seco ST over Arroyo Seco Chan in Los Angeles County, California. It was built in 1939, so it is 86 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 1,793 vehicles a day, roughly 1% of them trucks, projected to reach 1,972 by 2044. The structure is 67 ft (20.3 m) long and 73 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSeco ST
CrossesArroyo Seco Chan
Location0.1MI W/O Arroyo Blvd
RouteCity Street 0Q488
CountyLos Angeles County
StateCalifornia
Coordinates34.15599, -118.16811
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating37.1 US tons
Inventory rating22.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length67 ft (20.3 m)
Longest span60 ft (18.3 m)
Deck width73 ft (22.2 m)
Roadway width60 ft (18.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,793 (2014)
Projected traffic1,972 by 2044
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Seco ST over Arroyo Seco Chan built?

It was built in 1939, making it 86 years old in 2025.

What condition is Seco ST over Arroyo Seco Chan 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 2024.

How much traffic does Seco ST over Arroyo Seco Chan carry?

About 1,793 vehicles per day (2014 count), of which roughly 1% are trucks.

How long is Seco ST over Arroyo Seco Chan?

The structure is 67 ft (20.3 m) long with a longest span of 60 ft (18.3 m) and a deck 73 ft wide.

Who owns Seco ST over Arroyo Seco Chan?

It is owned by the City or Municipal Highway Agency.