US Bridges

Canoga Ave over Santa Susana Creek

Fair

Los Angeles County, California · 0.2 M N/O Parthenia ST · Structure no. 53C1117

Built
1966
59 years old, rebuilt 1971
Condition
Fair
inspected November 2023
Type
Culvert
Concrete
Length
45 ft
1 main span
Daily traffic
23,713
2016 count
Owner
County
County Highway Agency

About this bridge

Canoga Ave over Santa Susana Creek is a concrete culvert carrying Canoga Ave over Santa Susana Creek in Los Angeles County, California. It was built in 1966 and reconstructed in 1971, 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 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 23,713 vehicles a day, roughly 3% of them trucks, projected to reach 60,766 by 2042. The structure is 45 ft (13.7 m) long and 77 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesCanoga Ave
CrossesSanta Susana Creek
Location0.2 M N/O Parthenia ST
RouteCity Street 0
Coordinates34.23073, -118.59745
Functional classUrban Other Principal 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
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating93.3 US tons
Inventory rating56.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length45 ft (13.7 m)
Longest span40 ft (12.2 m)
Deck width77 ft (23.6 m)
Roadway width62 ft (18.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,713 (2016)
Projected traffic60,766 by 2042
Trucks3%
Lanes on structure5
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

OwnerCounty 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 Canoga Ave over Santa Susana Creek built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1971.

What condition is Canoga Ave over Santa Susana Creek 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 November 2023.

How much traffic does Canoga Ave over Santa Susana Creek carry?

About 23,713 vehicles per day (2016 count), of which roughly 3% are trucks.

How long is Canoga Ave over Santa Susana Creek?

The structure is 45 ft (13.7 m) long with a longest span of 40 ft (12.2 m) and a deck 77 ft wide.

Who owns Canoga Ave over Santa Susana Creek?

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