US Bridges

Parthenia ST over Aliso Creek

Good

Los Angeles County, California · 0.57MI W/O Reseda Blvd · Structure no. 53C1280

Built
1955
70 years old, rebuilt 1970
Condition
Good
inspected October 2024
Type
Culvert
Concrete Continuous
Length
52 ft
2 main spans
Daily traffic
34,493
2015 count
Owner
City
City or Municipal Highway Agency

About this bridge

Parthenia ST over Aliso Creek is a concrete continuous culvert carrying Parthenia ST over Aliso Creek in Los Angeles County, California. It was built in 1955 and reconstructed in 1970, so it is 70 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 34,493 vehicles a day, roughly 3% of them trucks, projected to reach 60,766 by 2042. The structure is 52 ft (15.8 m) long and 80 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesParthenia ST
CrossesAliso Creek
Location0.57MI W/O Reseda Blvd
RouteCity Street 0
Coordinates34.22813, -118.5462
Functional classUrban Other Principal 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 evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.2 US tons
Inventory rating35.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length52 ft (15.8 m)
Longest span24 ft (7.4 m)
Deck width80 ft (24.4 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,493 (2015)
Projected traffic60,766 by 2042
Trucks3%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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 Parthenia ST over Aliso Creek built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1970.

What condition is Parthenia 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 Parthenia ST over Aliso Creek carry?

About 34,493 vehicles per day (2015 count), of which roughly 3% are trucks.

How long is Parthenia ST over Aliso Creek?

The structure is 52 ft (15.8 m) long with a longest span of 24 ft (7.4 m) and a deck 80 ft wide.

Who owns Parthenia ST over Aliso Creek?

It is owned by the City or Municipal Highway Agency.