US Bridges

Westridge RD over Arroyo Canyon

Fair

Los Angeles County, California · 210 M W/O Mandvle Cyn RD · Structure no. 53C1686

Built
1928
97 years old
Condition
Fair
inspected September 2024
Type
Arch - Deck
Concrete
Length
78 ft
1 main span
Daily traffic
4,000
2016 count
Owner
City
City or Municipal Highway Agency

About this bridge

Westridge RD over Arroyo Canyon is a concrete arch - deck carrying Westridge RD over Arroyo Canyon in Los Angeles County, California. It was built in 1928, so it is 97 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 5 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 4,000 vehicles a day, roughly 1% of them trucks, projected to reach 6,245 by 2045. The structure is 78 ft (23.8 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesWestridge RD
CrossesArroyo Canyon
Location210 M W/O Mandvle Cyn RD
RouteCity Street 0
CountyLos Angeles County
StateCalifornia
Coordinates34.06531, -118.49566
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating80.7 US tons
Inventory rating48.2 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 20
Structure length78 ft (23.8 m)
Longest span72 ft (21.9 m)
Deck width32 ft (9.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,000 (2016)
Projected traffic6,245 by 2045
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Westridge RD over Arroyo Canyon built?

It was built in 1928, making it 97 years old in 2025.

What condition is Westridge RD over Arroyo Canyon 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 Westridge RD over Arroyo Canyon carry?

About 4,000 vehicles per day (2016 count), of which roughly 1% are trucks.

How long is Westridge RD over Arroyo Canyon?

The structure is 78 ft (23.8 m) long with a longest span of 72 ft (21.9 m) and a deck 32 ft wide.

Who owns Westridge RD over Arroyo Canyon?

It is owned by the City or Municipal Highway Agency.