US Bridges

Parthenia ST over Santa Susana Creek

Good

Los Angeles County, California · 0.2 MI E/O Canoga Ave · Structure no. 53C1277

Built
1966
59 years old, rebuilt 2000
Condition
Good
inspected November 2023
Type
Culvert
Concrete
Length
43 ft
1 main span
Daily traffic
8,727
2016 count
Owner
City
City or Municipal Highway Agency

About this bridge

Parthenia ST over Santa Susana Creek is a concrete culvert carrying Parthenia ST over Santa Susana Creek in Los Angeles County, California. It was built in 1966 and reconstructed in 2000, so it is 59 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 8,727 vehicles a day, roughly 2% of them trucks, projected to reach 18,439 by 2042. The structure is 43 ft (13.1 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesParthenia ST
CrossesSanta Susana Creek
Location0.2 MI E/O Canoga Ave
RouteCity Street 0
Coordinates34.22809, -118.59436
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 inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length43 ft (13.1 m)
Longest span39 ft (11.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,727 (2016)
Projected traffic18,439 by 2042
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 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 Santa Susana Creek built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 2000.

What condition is Parthenia ST over Santa Susana 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 November 2023.

How much traffic does Parthenia ST over Santa Susana Creek carry?

About 8,727 vehicles per day (2016 count), of which roughly 2% are trucks.

How long is Parthenia ST over Santa Susana Creek?

The structure is 43 ft (13.1 m) long with a longest span of 39 ft (11.9 m).

Who owns Parthenia ST over Santa Susana Creek?

It is owned by the City or Municipal Highway Agency.