US Bridges

Strathern ST over Aliso Creek

Good

Los Angeles County, California · 175FT E/O Wilbur Ave · Structure no. 53C1330

Built
1952
73 years old, rebuilt 2006
Condition
Good
inspected October 2024
Type
Culvert
Concrete Continuous
Length
53 ft
2 main spans
Daily traffic
3,665
2016 count
Owner
Local
Other Local Agency

About this bridge

Strathern ST over Aliso Creek is a concrete continuous culvert carrying Strathern ST over Aliso Creek in Los Angeles County, California. It was built in 1952 and reconstructed in 2006, so it is 73 years old, older 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 3,665 vehicles a day, roughly 2% of them trucks, projected to reach 5,858 by 2042. The structure is 53 ft (16.1 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesStrathern ST
CrossesAliso Creek
Location175FT E/O Wilbur Ave
RouteCity Street 0
Coordinates34.21558, -118.54411
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length53 ft (16.1 m)
Longest span25 ft (7.6 m)
Deck width52 ft (15.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,665 (2016)
Projected traffic5,858 by 2042
Trucks2%
Lanes on structure2
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

OwnerOther Local 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 Strathern ST over Aliso Creek built?

It was built in 1952, making it 73 years old in 2025. It was reconstructed in 2006.

What condition is Strathern ST over Aliso Creek 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 October 2024.

How much traffic does Strathern ST over Aliso Creek carry?

About 3,665 vehicles per day (2016 count), of which roughly 2% are trucks.

How long is Strathern ST over Aliso Creek?

The structure is 53 ft (16.1 m) long with a longest span of 25 ft (7.6 m) and a deck 52 ft wide.

Who owns Strathern ST over Aliso Creek?

It is owned by the Other Local Agency and maintained by the City or Municipal Highway Agency.